dir/include/items.php

<?php

require_once('include/bbcode.php');
require_once('include/oembed.php');
require_once('include/salmon.php');
require_once('include/crypto.php');

function get_feed_for(&$a, $dfrn_id, $owner_nick, $last_update, $direction = 0) {


	$sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
	$public_feed = (($dfrn_id) ? false : true);
	$starred     = false;   // not yet implemented, possible security issues
	$converse    = false;

	if($public_feed && $a->argc > 2) {
		for($x = 2; $x < $a->argc; $x++) {
			if($a->argv[$x] == 'converse')
				$converse = true;
			if($a->argv[$x] == 'starred')
				$starred = true;
			if($a->argv[$x] === 'category' && $a->argc > ($x + 1) && strlen($a->argv[$x+1]))
				$category = $a->argv[$x+1];
		}


	}

	

	// default permissions - anonymous user

	$sql_extra = " AND `allow_cid` = '' AND `allow_gid` = '' AND `deny_cid`  = '' AND `deny_gid`  = '' ";

	$r = q("SELECT `contact`.*, `user`.`uid` AS `user_uid`, `user`.`nickname`, `user`.`timezone`, `user`.`page-flags`
		FROM `contact` LEFT JOIN `user` ON `user`.`uid` = `contact`.`uid`
		WHERE `contact`.`self` = 1 AND `user`.`nickname` = '%s' LIMIT 1",
		dbesc($owner_nick)
	);

	if(! count($r))
		killme();

	$owner = $r[0];
	$owner_id = $owner['user_uid'];
	$owner_nick = $owner['nickname'];

	$birthday = feed_birthday($owner_id,$owner['timezone']);

	if(! $public_feed) {

		$sql_extra = '';
		switch($direction) {
			case (-1):
				$sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($dfrn_id));
				$my_id = $dfrn_id;
				break;
			case 0:
				$sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
				$my_id = '1:' . $dfrn_id;
				break;
			case 1:
				$sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", dbesc($dfrn_id));
				$my_id = '0:' . $dfrn_id;
				break;
			default:
				return false;
				break; // NOTREACHED
		}

		$r = q("SELECT * FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `contact`.`uid` = %d $sql_extra LIMIT 1",
			intval($owner_id)
		);

		if(! count($r))
			killme();

		$contact = $r[0];
		$groups = init_groups_visitor($contact['id']);

		if(count($groups)) {
			for($x = 0; $x < count($groups); $x ++) 
				$groups[$x] = '<' . intval($groups[$x]) . '>' ;
			$gs = implode('|', $groups);
		}
		else
			$gs = '<<>>' ; // Impossible to match 

		$sql_extra = sprintf(" 
			AND ( `allow_cid` = '' OR     `allow_cid` REGEXP '<%d>' ) 
			AND ( `deny_cid`  = '' OR NOT `deny_cid`  REGEXP '<%d>' ) 
			AND ( `allow_gid` = '' OR     `allow_gid` REGEXP '%s' )
			AND ( `deny_gid`  = '' OR NOT `deny_gid`  REGEXP '%s') 
		",
			intval($contact['id']),
			intval($contact['id']),
			dbesc($gs),
			dbesc($gs)
		);
	}

	if($public_feed)
		$sort = 'DESC';
	else
		$sort = 'ASC';

	if(! strlen($last_update))
		$last_update = 'now -30 days';

	if(isset($category)) {
		$sql_extra .= file_tag_file_query('item',$category,'category');
	}

	if($public_feed) {
		if(! $converse)
			$sql_extra .= " AND `contact`.`self` = 1 ";
	}

	$check_date = datetime_convert('UTC','UTC',$last_update,'Y-m-d H:i:s');

	$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, 
		`contact`.`name`, `contact`.`network`, `contact`.`photo`, `contact`.`url`, 
		`contact`.`name-date`, `contact`.`uri-date`, `contact`.`avatar-date`,
		`contact`.`thumb`, `contact`.`dfrn-id`, `contact`.`self`, 
		`contact`.`id` AS `contact-id`, `contact`.`uid` AS `contact-uid`,
		`sign`.`signed_text`, `sign`.`signature`, `sign`.`signer`
		FROM `item` LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
		LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
		WHERE `item`.`uid` = %d AND `item`.`visible` = 1 and `item`.`moderated` = 0 AND `item`.`parent` != 0 
		AND `item`.`wall` = 1 AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
		AND ( `item`.`edited` > '%s' OR `item`.`changed` > '%s' )
		$sql_extra
		ORDER BY `parent` %s, `created` ASC LIMIT 0, 300",
		intval($owner_id),
		dbesc($check_date),
		dbesc($check_date),
		dbesc($sort)
	);

	// Will check further below if this actually returned results.
	// We will provide an empty feed if that is the case.

	$items = $r;

	$feed_template = get_markup_template(($dfrn_id) ? 'atom_feed_dfrn.tpl' : 'atom_feed.tpl');

	$atom = '';

	$hubxml = feed_hublinks();

	$salmon = feed_salmonlinks($owner_nick);

	$atom .= replace_macros($feed_template, array(
		'$version'      => xmlify(FRIENDICA_VERSION),
		'$feed_id'      => xmlify($a->get_baseurl() . '/profile/' . $owner_nick),
		'$feed_title'   => xmlify($owner['name']),
		'$feed_updated' => xmlify(datetime_convert('UTC', 'UTC', 'now' , ATOM_TIME)) ,
		'$hub'          => $hubxml,
		'$salmon'       => $salmon,
		'$name'         => xmlify($owner['name']),
		'$profile_page' => xmlify($owner['url']),
		'$photo'        => xmlify($owner['photo']),
		'$thumb'        => xmlify($owner['thumb']),
		'$picdate'      => xmlify(datetime_convert('UTC','UTC',$owner['avatar-date'] . '+00:00' , ATOM_TIME)) ,
		'$uridate'      => xmlify(datetime_convert('UTC','UTC',$owner['uri-date']    . '+00:00' , ATOM_TIME)) ,
		'$namdate'      => xmlify(datetime_convert('UTC','UTC',$owner['name-date']   . '+00:00' , ATOM_TIME)) , 
		'$birthday'     => ((strlen($birthday)) ? '<dfrn:birthday>' . xmlify($birthday) . '</dfrn:birthday>' : ''),
		'$community'    => (($owner['page-flags'] == PAGE_COMMUNITY) ? '<dfrn:community>1</dfrn:community>' : '')
	));

	call_hooks('atom_feed', $atom);

	if(! count($items)) {

		call_hooks('atom_feed_end', $atom);

		$atom .= '</feed>' . "\r\n";
		return $atom;
	}

	foreach($items as $item) {

		// prevent private email from leaking.
		if($item['network'] === NETWORK_MAIL)
			continue;

		// public feeds get html, our own nodes use bbcode

		if($public_feed) {
			$type = 'html';
			// catch any email that's in a public conversation and make sure it doesn't leak
			if($item['private'])
				continue;
		}
		else {
			$type = 'text';
		}

		$atom .= atom_entry($item,$type,null,$owner,true);
	}

	call_hooks('atom_feed_end', $atom);

	$atom .= '</feed>' . "\r\n";

	return $atom;
}


function construct_verb($item) {
	if($item['verb'])
		return $item['verb'];
	return ACTIVITY_POST;
}

function construct_activity_object($item) {

	if($item['object']) {
		$o = '<as:object>' . "\r\n";
		$r = parse_xml_string($item['object'],false);


		if(! $r)
			return '';
		if($r->type)
			$o .= '<as:object-type>' . xmlify($r->type) . '</as:object-type>' . "\r\n";
		if($r->id)
			$o .= '<id>' . xmlify($r->id) . '</id>' . "\r\n";
		if($r->title)
			$o .= '<title>' . xmlify($r->title) . '</title>' . "\r\n";
		if($r->link) {
			if(substr($r->link,0,1) === '<') {
				// patch up some facebook "like" activity objects that got stored incorrectly
				// for a couple of months prior to 9-Jun-2011 and generated bad XML.
				// we can probably remove this hack here and in the following function in a few months time.
				if(strstr($r->link,'&') && (! strstr($r->link,'&amp;')))
					$r->link = str_replace('&','&amp;', $r->link);
				$r->link = preg_replace('/\<link(.*?)\"\>/','<link$1"/>',$r->link);
				$o .= $r->link;
			}					
			else
				$o .= '<link rel="alternate" type="text/html" href="' . xmlify($r->link) . '" />' . "\r\n";
		}
		if($r->content)
			$o .= '<content type="html" >' . xmlify(bbcode($r->content)) . '</content>' . "\r\n";
		$o .= '</as:object>' . "\r\n";
		return $o;
	}

	return '';
} 

function construct_activity_target($item) {

	if($item['target']) {
		$o = '<as:target>' . "\r\n";
		$r = parse_xml_string($item['target'],false);
		if(! $r)
			return '';
		if($r->type)
			$o .= '<as:object-type>' . xmlify($r->type) . '</as:object-type>' . "\r\n";
		if($r->id)
			$o .= '<id>' . xmlify($r->id) . '</id>' . "\r\n";
		if($r->title)
			$o .= '<title>' . xmlify($r->title) . '</title>' . "\r\n";
		if($r->link) {
			if(substr($r->link,0,1) === '<') {
				if(strstr($r->link,'&') && (! strstr($r->link,'&amp;')))
					$r->link = str_replace('&','&amp;', $r->link);
				$r->link = preg_replace('/\<link(.*?)\"\>/','<link$1"/>',$r->link);
				$o .= $r->link;
			}					
			else
				$o .= '<link rel="alternate" type="text/html" href="' . xmlify($r->link) . '" />' . "\r\n";
		}
		if($r->content)
			$o .= '<content type="html" >' . xmlify(bbcode($r->content)) . '</content>' . "\r\n";
		$o .= '</as:target>' . "\r\n";
		return $o;
	}

	return '';
} 




function get_atom_elements($feed,$item) {

	require_once('library/HTMLPurifier.auto.php');
	require_once('include/html2bbcode.php');

	$best_photo = array();

	$res = array();

	$author = $item->get_author();
	if($author) { 
		$res['author-name'] = unxmlify($author->get_name());
		$res['author-link'] = unxmlify($author->get_link());
	}
	else {
		$res['author-name'] = unxmlify($feed->get_title());
		$res['author-link'] = unxmlify($feed->get_permalink());
	}
	$res['uri'] = unxmlify($item->get_id());
	$res['title'] = unxmlify($item->get_title());
	$res['body'] = unxmlify($item->get_content());
	$res['plink'] = unxmlify($item->get_link(0));

	if($res['plink'])
		$base_url = implode('/', array_slice(explode('/',$res['plink']),0,3));
	else
		$base_url = '';

	// look for a photo. We should check media size and find the best one,
	// but for now let's just find any author photo

	$rawauthor = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'author');

	if($rawauthor && $rawauthor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link']) {
		$base = $rawauthor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];
		foreach($base as $link) {
			if(!x($res, 'author-avatar') || !$res['author-avatar']) {
				if($link['attribs']['']['rel'] === 'photo' || $link['attribs']['']['rel'] === 'avatar')
					$res['author-avatar'] = unxmlify($link['attribs']['']['href']);
			}
		}
	}			

	$rawactor = $item->get_item_tags(NAMESPACE_ACTIVITY, 'actor');

	if($rawactor && activity_match($rawactor[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'],ACTIVITY_OBJ_PERSON)) {
		$base = $rawactor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];
		if($base && count($base)) {
			foreach($base as $link) {
				if($link['attribs']['']['rel'] === 'alternate' && (! $res['author-link']))
					$res['author-link'] = unxmlify($link['attribs']['']['href']);
				if(!x($res, 'author-avatar') || !$res['author-avatar']) {
					if($link['attribs']['']['rel'] === 'avatar' || $link['attribs']['']['rel'] === 'photo')
						$res['author-avatar'] = unxmlify($link['attribs']['']['href']);
				}
			}
		}
	}

	// No photo/profile-link on the item - look at the feed level

	if((! (x($res,'author-link'))) || (! (x($res,'author-avatar')))) {
		$rawauthor = $feed->get_feed_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'author');
		if($rawauthor && $rawauthor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link']) {
			$base = $rawauthor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];
			foreach($base as $link) {
				if($link['attribs']['']['rel'] === 'alternate' && (! $res['author-link']))
					$res['author-link'] = unxmlify($link['attribs']['']['href']);
				if(! $res['author-avatar']) {
					if($link['attribs']['']['rel'] === 'photo' || $link['attribs']['']['rel'] === 'avatar')
						$res['author-avatar'] = unxmlify($link['attribs']['']['href']);
				}
			}
		}			

		$rawactor = $feed->get_feed_tags(NAMESPACE_ACTIVITY, 'subject');

		if($rawactor && activity_match($rawactor[0]['child'][NAMESPACE_ACTIVITY]['object-type'][0]['data'],ACTIVITY_OBJ_PERSON)) {
			$base = $rawactor[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];

			if($base && count($base)) {
				foreach($base as $link) {
					if($link['attribs']['']['rel'] === 'alternate' && (! $res['author-link']))
						$res['author-link'] = unxmlify($link['attribs']['']['href']);
					if(! (x($res,'author-avatar'))) {
						if($link['attribs']['']['rel'] === 'avatar' || $link['attribs']['']['rel'] === 'photo')
							$res['author-avatar'] = unxmlify($link['attribs']['']['href']);
					}
				}
			}
		}
	}

	$apps = $item->get_item_tags(NAMESPACE_STATUSNET,'notice_info');
	if($apps && $apps[0]['attribs']['']['source']) {
		$res['app'] = strip_tags(unxmlify($apps[0]['attribs']['']['source']));
		if($res['app'] === 'web')
			$res['app'] = 'OStatus';
	}		   

	// base64 encoded json structure representing Diaspora signature

	$dsig = $item->get_item_tags(NAMESPACE_DFRN,'diaspora_signature');
	if($dsig) {
		$res['dsprsig'] = unxmlify($dsig[0]['data']);
	}

	$dguid = $item->get_item_tags(NAMESPACE_DFRN,'diaspora_guid');
	if($dguid)
		$res['guid'] = unxmlify($dguid[0]['data']);

	$bm = $item->get_item_tags(NAMESPACE_DFRN,'bookmark');
	if($bm)
		$res['bookmark'] = ((unxmlify($bm[0]['data']) === 'true') ? 1 : 0);


	/**
	 * If there's a copy of the body content which is guaranteed to have survived mangling in transit, use it.
	 */

	$have_real_body = false;

	$rawenv = $item->get_item_tags(NAMESPACE_DFRN, 'env');
	if($rawenv) {
		$have_real_body = true;
		$res['body'] = $rawenv[0]['data'];
		$res['body'] = str_replace(array(' ',"\t","\r","\n"), array('','','',''),$res['body']);
		// make sure nobody is trying to sneak some html tags by us
		$res['body'] = notags(base64url_decode($res['body']));
	}

	$maxlen = get_max_import_size();
	if($maxlen && (strlen($res['body']) > $maxlen))
		$res['body'] = substr($res['body'],0, $maxlen);

	// It isn't certain at this point whether our content is plaintext or html and we'd be foolish to trust 
	// the content type. Our own network only emits text normally, though it might have been converted to 
	// html if we used a pubsubhubbub transport. But if we see even one html tag in our text, we will
	// have to assume it is all html and needs to be purified.

	// It doesn't matter all that much security wise - because before this content is used anywhere, we are 
	// going to escape any tags we find regardless, but this lets us import a limited subset of html from 
	// the wild, by sanitising it and converting supported tags to bbcode before we rip out any remaining 
	// html.

	if((strpos($res['body'],'<') !== false) && (strpos($res['body'],'>') !== false)) {

		$res['body'] = reltoabs($res['body'],$base_url);

		$res['body'] = html2bb_video($res['body']);

		$res['body'] = oembed_html2bbcode($res['body']);

		$config = HTMLPurifier_Config::createDefault();
		$config->set('Cache.DefinitionImpl', null);

		// we shouldn't need a whitelist, because the bbcode converter
		// will strip out any unsupported tags.

		$purifier = new HTMLPurifier($config);
		$res['body'] = $purifier->purify($res['body']);

		$res['body'] = @html2bbcode($res['body']);
	}
	elseif(! $have_real_body) {

		// it's not one of our messages and it has no tags
		// so it's probably just text. We'll escape it just to be safe.

		$res['body'] = escape_tags($res['body']);
	}

	// this tag is obsolete but we keep it for really old sites

	$allow = $item->get_item_tags(NAMESPACE_DFRN,'comment-allow');
	if($allow && $allow[0]['data'] == 1)
		$res['last-child'] = 1;
	else
		$res['last-child'] = 0;

	$private = $item->get_item_tags(NAMESPACE_DFRN,'private');
	if($private && $private[0]['data'] == 1)
		$res['private'] = 1;
	else
		$res['private'] = 0;

	$extid = $item->get_item_tags(NAMESPACE_DFRN,'extid');
	if($extid && $extid[0]['data'])
		$res['extid'] = $extid[0]['data'];

	$rawlocation = $item->get_item_tags(NAMESPACE_DFRN, 'location');
	if($rawlocation)
		$res['location'] = unxmlify($rawlocation[0]['data']);


	$rawcreated = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'published');
	if($rawcreated)
		$res['created'] = unxmlify($rawcreated[0]['data']);


	$rawedited = $item->get_item_tags(SIMPLEPIE_NAMESPACE_ATOM_10,'updated');
	if($rawedited)
		$res['edited'] = unxmlify($rawedited[0]['data']);

	if((x($res,'edited')) && (! (x($res,'created'))))
		$res['created'] = $res['edited']; 

	if(! $res['created'])
		$res['created'] = $item->get_date('c');

	if(! $res['edited'])
		$res['edited'] = $item->get_date('c');


	// Disallow time travelling posts

	$d1 = strtotime($res['created']);
	$d2 = strtotime($res['edited']);
	$d3 = strtotime('now');

	if($d1 > $d3)
		$res['created'] = datetime_convert();
	if($d2 > $d3)
		$res['edited'] = datetime_convert();

	$rawowner = $item->get_item_tags(NAMESPACE_DFRN, 'owner');
	if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['name'][0]['data'])
		$res['owner-name'] = unxmlify($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['name'][0]['data']);
	elseif($rawowner[0]['child'][NAMESPACE_DFRN]['name'][0]['data'])
		$res['owner-name'] = unxmlify($rawowner[0]['child'][NAMESPACE_DFRN]['name'][0]['data']);
	if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['uri'][0]['data'])
		$res['owner-link'] = unxmlify($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['uri'][0]['data']);
	elseif($rawowner[0]['child'][NAMESPACE_DFRN]['uri'][0]['data'])
		$res['owner-link'] = unxmlify($rawowner[0]['child'][NAMESPACE_DFRN]['uri'][0]['data']);

	if($rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link']) {
		$base = $rawowner[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['link'];

		foreach($base as $link) {
			if(!x($res, 'owner-avatar') || !$res['owner-avatar']) {
				if($link['attribs']['']['rel'] === 'photo' || $link['attribs']['']['rel'] === 'avatar')			
					$res['owner-avatar'] = unxmlify($link['attribs']['']['href']);
			}
		}
	}

	$rawgeo = $item->get_item_tags(NAMESPACE_GEORSS,'point');
	if($rawgeo)
		$res['coord'] = unxmlify($rawgeo[0]['data']);


	$rawverb = $item->get_item_tags(NAMESPACE_ACTIVITY, 'verb');

	// select between supported verbs

	if($rawverb) {
		$res['verb'] = unxmlify($rawverb[0]['data']);
	}

	// translate OStatus unfollow to activity streams if it happened to get selected
		
	if((x($res,'verb')) && ($res['verb'] === 'http://ostatus.org/schema/1.0/unfollow'))
		$res['verb'] = ACTIVITY_UNFOLLOW;

	$cats = $item->get_categories();
	if($cats) {
		$tag_arr = array();
		foreach($cats as $cat) {
			$term = $cat->get_term();
			if(! $term)
				$term = $cat->get_label();
			$scheme = $cat->get_scheme();
			if($scheme && $term && stristr($scheme,'X-DFRN:'))
				$tag_arr[] = substr($scheme,7,1) . '[url=' . unxmlify(substr($scheme,9)) . ']' . unxmlify($term) . '[/url]';
			elseif($term)
				$tag_arr[] = notags(trim($term));
		}
		$res['tag'] =  implode(',', $tag_arr);
	}

	$attach = $item->get_enclosures();
	if($attach) {
		$att_arr = array();
		foreach($attach as $att) {
			$len   = intval($att->get_length());
			$link  = str_replace(array(',','"'),array('%2D','%22'),notags(trim(unxmlify($att->get_link()))));
			$title = str_replace(array(',','"'),array('%2D','%22'),notags(trim(unxmlify($att->get_title()))));
			$type  = str_replace(array(',','"'),array('%2D','%22'),notags(trim(unxmlify($att->get_type()))));
			if(strpos($type,';'))
				$type = substr($type,0,strpos($type,';'));
			if((! $link) || (strpos($link,'http') !== 0))
				continue;

			if(! $title)
				$title = ' ';
			if(! $type)
				$type = 'application/octet-stream';

			$att_arr[] = '[attach]href="' . $link . '" length="' . $len . '" type="' . $type . '" title="' . $title . '"[/attach]'; 
		}
		$res['attach'] = implode(',', $att_arr);
	}

	$rawobj = $item->get_item_tags(NAMESPACE_ACTIVITY, 'object');

	if($rawobj) {
		$res['object'] = '<object>' . "\n";
		$child = $rawobj[0]['child'];
		if($child[NAMESPACE_ACTIVITY]['object-type'][0]['data']) {
			$res['object-type'] = $child[NAMESPACE_ACTIVITY]['object-type'][0]['data'];
			$res['object'] .= '<type>' . $child[NAMESPACE_ACTIVITY]['object-type'][0]['data'] . '</type>' . "\n";
		}	
		if(x($child[SIMPLEPIE_NAMESPACE_ATOM_10], 'id') && $child[SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'])
			$res['object'] .= '<id>' . $child[SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'] . '</id>' . "\n";
		if(x($child[SIMPLEPIE_NAMESPACE_ATOM_10], 'link') && $child[SIMPLEPIE_NAMESPACE_ATOM_10]['link'])
			$res['object'] .= '<link>' . encode_rel_links($child[SIMPLEPIE_NAMESPACE_ATOM_10]['link']) . '</link>' . "\n";
		if(x($child[SIMPLEPIE_NAMESPACE_ATOM_10], 'title') && $child[SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'])
			$res['object'] .= '<title>' . $child[SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'] . '</title>' . "\n";
		if(x($child[SIMPLEPIE_NAMESPACE_ATOM_10], 'content') && $child[SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data']) {
			$body = $child[SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data'];
			if(! $body)
				$body = $child[SIMPLEPIE_NAMESPACE_ATOM_10]['summary'][0]['data'];
			// preserve a copy of the original body content in case we later need to parse out any microformat information, e.g. events
			$res['object'] .= '<orig>' . xmlify($body) . '</orig>' . "\n";
			if((strpos($body,'<') !== false) || (strpos($body,'>') !== false)) {

				$body = html2bb_video($body);

				$config = HTMLPurifier_Config::createDefault();
				$config->set('Cache.DefinitionImpl', null);

				$purifier = new HTMLPurifier($config);
				$body = $purifier->purify($body);
				$body = html2bbcode($body);
			}

			$res['object'] .= '<content>' . $body . '</content>' . "\n";
		}

		$res['object'] .= '</object>' . "\n";
	}

	$rawobj = $item->get_item_tags(NAMESPACE_ACTIVITY, 'target');

	if($rawobj) {
		$res['target'] = '<target>' . "\n";
		$child = $rawobj[0]['child'];
		if($child[NAMESPACE_ACTIVITY]['object-type'][0]['data']) {
			$res['target'] .= '<type>' . $child[NAMESPACE_ACTIVITY]['object-type'][0]['data'] . '</type>' . "\n";
		}	
		if(x($child[SIMPLEPIE_NAMESPACE_ATOM_10], 'id') && $child[SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'])
			$res['target'] .= '<id>' . $child[SIMPLEPIE_NAMESPACE_ATOM_10]['id'][0]['data'] . '</id>' . "\n";
		if(x($child[SIMPLEPIE_NAMESPACE_ATOM_10], 'link') && $child[SIMPLEPIE_NAMESPACE_ATOM_10]['link'])
			$res['target'] .= '<link>' . encode_rel_links($child[SIMPLEPIE_NAMESPACE_ATOM_10]['link']) . '</link>' . "\n";
		if(x($child[SIMPLEPIE_NAMESPACE_ATOM_10], 'data') && $child[SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'])
			$res['target'] .= '<title>' . $child[SIMPLEPIE_NAMESPACE_ATOM_10]['title'][0]['data'] . '</title>' . "\n";
		if(x($child[SIMPLEPIE_NAMESPACE_ATOM_10], 'data') && $child[SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data']) {
			$body = $child[SIMPLEPIE_NAMESPACE_ATOM_10]['content'][0]['data'];
			if(! $body)
				$body = $child[SIMPLEPIE_NAMESPACE_ATOM_10]['summary'][0]['data'];
			// preserve a copy of the original body content in case we later need to parse out any microformat information, e.g. events
			$res['target'] .= '<orig>' . xmlify($body) . '</orig>' . "\n";
			if((strpos($body,'<') !== false) || (strpos($body,'>') !== false)) {

				$body = html2bb_video($body);

				$config = HTMLPurifier_Config::createDefault();
				$config->set('Cache.DefinitionImpl', null);

				$purifier = new HTMLPurifier($config);
				$body = $purifier->purify($body);
				$body = html2bbcode($body);
			}

			$res['target'] .= '<content>' . $body . '</content>' . "\n";
		}

		$res['target'] .= '</target>' . "\n";
	}

	$arr = array('feed' => $feed, 'item' => $item, 'result' => $res);

	call_hooks('parse_atom', $arr);

	return $res;
}

function encode_rel_links($links) {
	$o = '';
	if(! ((is_array($links)) && (count($links))))
		return $o;
	foreach($links as $link) {
		$o .= '<link ';
		if($link['attribs']['']['rel'])
			$o .= 'rel="' . $link['attribs']['']['rel'] . '" ';
		if($link['attribs']['']['type'])
			$o .= 'type="' . $link['attribs']['']['type'] . '" ';
		if($link['attribs']['']['href'])
			$o .= 'href="' . $link['attribs']['']['href'] . '" ';
		if( (x($link['attribs'],NAMESPACE_MEDIA)) && $link['attribs'][NAMESPACE_MEDIA]['width'])
			$o .= 'media:width="' . $link['attribs'][NAMESPACE_MEDIA]['width'] . '" ';
		if( (x($link['attribs'],NAMESPACE_MEDIA)) && $link['attribs'][NAMESPACE_MEDIA]['height'])
			$o .= 'media:height="' . $link['attribs'][NAMESPACE_MEDIA]['height'] . '" ';
		$o .= ' />' . "\n" ;
	}
	return xmlify($o);
}

function item_store($arr,$force_parent = false) {

	// If a Diaspora signature structure was passed in, pull it out of the 
	// item array and set it aside for later storage.

	$dsprsig = null;
	if(x($arr,'dsprsig')) {
		$dsprsig = json_decode(base64_decode($arr['dsprsig']));
		unset($arr['dsprsig']);
	}

	if(x($arr, 'gravity'))
		$arr['gravity'] = intval($arr['gravity']);
	elseif($arr['parent-uri'] === $arr['uri'])
		$arr['gravity'] = 0;
	elseif(activity_match($arr['verb'],ACTIVITY_POST))
		$arr['gravity'] = 6;
	else      
		$arr['gravity'] = 6;   // extensible catchall

	if(! x($arr,'type'))
		$arr['type']      = 'remote';

	// Shouldn't happen but we want to make absolutely sure it doesn't leak from a plugin.

	if((strpos($arr['body'],'<') !== false) || (strpos($arr['body'],'>') !== false)) 
		$arr['body'] = strip_tags($arr['body']);


	$arr['wall']          = ((x($arr,'wall'))          ? intval($arr['wall'])                : 0);
	$arr['uri']           = ((x($arr,'uri'))           ? notags(trim($arr['uri']))           : random_string());
	$arr['extid']         = ((x($arr,'extid'))         ? notags(trim($arr['extid']))         : '');
	$arr['author-name']   = ((x($arr,'author-name'))   ? notags(trim($arr['author-name']))   : '');
	$arr['author-link']   = ((x($arr,'author-link'))   ? notags(trim($arr['author-link']))   : '');
	$arr['author-avatar'] = ((x($arr,'author-avatar')) ? notags(trim($arr['author-avatar'])) : '');
	$arr['owner-name']    = ((x($arr,'owner-name'))    ? notags(trim($arr['owner-name']))    : '');
	$arr['owner-link']    = ((x($arr,'owner-link'))    ? notags(trim($arr['owner-link']))    : '');
	$arr['owner-avatar']  = ((x($arr,'owner-avatar'))  ? notags(trim($arr['owner-avatar']))  : '');
	$arr['created']       = ((x($arr,'created') !== false) ? datetime_convert('UTC','UTC',$arr['created']) : datetime_convert());
	$arr['edited']        = ((x($arr,'edited')  !== false) ? datetime_convert('UTC','UTC',$arr['edited'])  : datetime_convert());
	$arr['commented']     = datetime_convert();
	$arr['received']      = datetime_convert();
	$arr['changed']       = datetime_convert();
	$arr['title']         = ((x($arr,'title'))         ? notags(trim($arr['title']))         : '');
	$arr['location']      = ((x($arr,'location'))      ? notags(trim($arr['location']))      : '');
	$arr['coord']         = ((x($arr,'coord'))         ? notags(trim($arr['coord']))         : '');
	$arr['last-child']    = ((x($arr,'last-child'))    ? intval($arr['last-child'])          : 0 );
	$arr['visible']       = ((x($arr,'visible') !== false) ? intval($arr['visible'])         : 1 );
	$arr['deleted']       = 0;
	$arr['parent-uri']    = ((x($arr,'parent-uri'))    ? notags(trim($arr['parent-uri']))    : '');
	$arr['verb']          = ((x($arr,'verb'))          ? notags(trim($arr['verb']))          : '');
	$arr['object-type']   = ((x($arr,'object-type'))   ? notags(trim($arr['object-type']))   : '');
	$arr['object']        = ((x($arr,'object'))        ? trim($arr['object'])                : '');
	$arr['target-type']   = ((x($arr,'target-type'))   ? notags(trim($arr['target-type']))   : '');
	$arr['target']        = ((x($arr,'target'))        ? trim($arr['target'])                : '');
	$arr['plink']         = ((x($arr,'plink'))         ? notags(trim($arr['plink']))         : '');
	$arr['allow_cid']     = ((x($arr,'allow_cid'))     ? trim($arr['allow_cid'])             : '');
	$arr['allow_gid']     = ((x($arr,'allow_gid'))     ? trim($arr['allow_gid'])             : '');
	$arr['deny_cid']      = ((x($arr,'deny_cid'))      ? trim($arr['deny_cid'])              : '');
	$arr['deny_gid']      = ((x($arr,'deny_gid'))      ? trim($arr['deny_gid'])              : '');
	$arr['private']       = ((x($arr,'private'))       ? intval($arr['private'])             : 0 );
	$arr['bookmark']      = ((x($arr,'bookmark'))      ? intval($arr['bookmark'])            : 0 );
	$arr['body']          = ((x($arr,'body'))          ? trim($arr['body'])                  : '');
	$arr['tag']           = ((x($arr,'tag'))           ? notags(trim($arr['tag']))           : '');
	$arr['attach']        = ((x($arr,'attach'))        ? notags(trim($arr['attach']))        : '');
	$arr['app']           = ((x($arr,'app'))           ? notags(trim($arr['app']))           : '');
	$arr['origin']        = ((x($arr,'origin'))        ? intval($arr['origin'])              : 0 );
	$arr['guid']          = ((x($arr,'guid'))          ? notags(trim($arr['guid']))          : get_guid());

	if($arr['parent-uri'] === $arr['uri']) {
		$parent_id = 0;
		$parent_deleted = 0;
		$allow_cid = $arr['allow_cid'];
		$allow_gid = $arr['allow_gid'];
		$deny_cid  = $arr['deny_cid'];
		$deny_gid  = $arr['deny_gid'];
	}
	else { 

		// find the parent and snarf the item id and ACL's
		// and anything else we need to inherit

		$r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d ORDER BY `id` ASC LIMIT 1",
			dbesc($arr['parent-uri']),
			intval($arr['uid'])
		);

		if(count($r)) {

			// is the new message multi-level threaded?
			// even though we don't support it now, preserve the info
			// and re-attach to the conversation parent.

			if($r[0]['uri'] != $r[0]['parent-uri']) {
				$arr['thr-parent'] = $arr['parent-uri'];
				$arr['parent-uri'] = $r[0]['parent-uri'];
				$z = q("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `parent-uri` = '%s' AND `uid` = %d 
					ORDER BY `id` ASC LIMIT 1",
					dbesc($r[0]['parent-uri']),
					dbesc($r[0]['parent-uri']),
					intval($arr['uid'])
				);
				if($z && count($z))
					$r = $z;
			}

			$parent_id      = $r[0]['id'];
			$parent_deleted = $r[0]['deleted'];
			$allow_cid      = $r[0]['allow_cid'];
			$allow_gid      = $r[0]['allow_gid'];
			$deny_cid       = $r[0]['deny_cid'];
			$deny_gid       = $r[0]['deny_gid'];
			$arr['wall']    = $r[0]['wall'];
		}
		else {

			// Allow one to see reply tweets from status.net even when
			// we don't have or can't see the original post.

			if($force_parent) {
				logger('item_store: $force_parent=true, reply converted to top-level post.');
				$parent_id = 0;
				$arr['thr-parent'] = $arr['parent-uri'];
				$arr['parent-uri'] = $arr['uri'];
				$arr['gravity'] = 0;
			}
			else {
				logger('item_store: item parent was not found - ignoring item');
				return 0;
			}
			
			$parent_deleted = 0;
		}
	}

	$r = q("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
		dbesc($arr['uri']),
		intval($arr['uid'])
	);
	if($r && count($r)) {
		logger('item-store: duplicate item ignored. ' . print_r($arr,true));
		return 0;
	}

	call_hooks('post_remote',$arr);

	if(x($arr,'cancel')) {
		logger('item_store: post cancelled by plugin.');
		return 0;
	}

	dbesc_array($arr);

	logger('item_store: ' . print_r($arr,true), LOGGER_DATA);

	$r = dbq("INSERT INTO `item` (`" 
			. implode("`, `", array_keys($arr)) 
			. "`) VALUES ('" 
			. implode("', '", array_values($arr)) 
			. "')" );

	// find the item we just created

	$r = q("SELECT `id` FROM `item` WHERE `uri` = '%s' AND `uid` = %d ORDER BY `id` ASC ",
		$arr['uri'],           // already dbesc'd
		intval($arr['uid'])
	);

	if(count($r)) {
		$current_post = $r[0]['id'];
		logger('item_store: created item ' . $current_post);
	}
	else {
		logger('item_store: could not locate created item');
		return 0;
	}
	if(count($r) > 1) {
		logger('item_store: duplicated post occurred. Removing duplicates.');
		q("DELETE FROM `item` WHERE `uri` = '%s' AND `uid` = %d AND `id` != %d ",
			$arr['uri'],
			intval($arr['uid']),
			intval($current_post)
		);
	}

	if((! $parent_id) || ($arr['parent-uri'] === $arr['uri']))	
		$parent_id = $current_post;

 	if(strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid))
		$private = 1;
	else
		$private = $arr['private']; 

	// Set parent id - and also make sure to inherit the parent's ACL's.

	$r = q("UPDATE `item` SET `parent` = %d, `allow_cid` = '%s', `allow_gid` = '%s',
		`deny_cid` = '%s', `deny_gid` = '%s', `private` = %d, `deleted` = %d WHERE `id` = %d LIMIT 1",
		intval($parent_id),
		dbesc($allow_cid),
		dbesc($allow_gid),
		dbesc($deny_cid),
		dbesc($deny_gid),
		intval($private),
		intval($parent_deleted),
		intval($current_post)
	);

	// update the commented timestamp on the parent

	q("UPDATE `item` set `commented` = '%s', `changed` = '%s' WHERE `id` = %d LIMIT 1",
		dbesc(datetime_convert()),
		dbesc(datetime_convert()),
		intval($parent_id)
	);

	if($dsprsig) {
		q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
			intval($current_post),
			dbesc($dsprsig->signed_text),
			dbesc($dsprsig->signature),
			dbesc($dsprsig->signer)
		);
	}


	/**
	 * If this is now the last-child, force all _other_ children of this parent to *not* be last-child
	 */

	if($arr['last-child']) {
		$r = q("UPDATE `item` SET `last-child` = 0 WHERE `parent-uri` = '%s' AND `uid` = %d AND `id` != %d",
			dbesc($arr['uri']),
			intval($arr['uid']),
			intval($current_post)
		);
	}

	tag_deliver($arr['uid'],$current_post);

	return $current_post;
}

function get_item_contact($item,$contacts) {
	if(! count($contacts) || (! is_array($item)))
		return false;
	foreach($contacts as $contact) {
		if($contact['id'] == $item['contact-id']) {
			return $contact;
			break; // NOTREACHED
		}
	}
	return false;
}


function tag_deliver($uid,$item_id) {

	// look for mention tags and setup a second delivery chain for forum/community posts if appropriate

	$a = get_app();

	$mention = false;

	$u = q("select * from user where uid = %d limit 1",
		intval($uid)
	);
	if(! count($u))
		return;

	$community_page = (($u[0]['page-flags'] == PAGE_COMMUNITY) ? true : false);
	$prvgroup = (($u[0]['page-flags'] == PAGE_PRVGROUP) ? true : false);


	$i = q("select * from item where id = %d and uid = %d limit 1",
		intval($item_id),
		intval($uid)
	);
	if(! count($i))
		return;

	$item = $i[0];

	$link = normalise_link($a->get_baseurl() . '/profile/' . $u[0]['nickname']);

	// Diaspora uses their own hardwired link URL in @-tags
	// instead of the one we supply with webfinger

	$dlink = normalise_link($a->get_baseurl() . '/u/' . $u[0]['nickname']);

	$cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism',$item['body'],$matches,PREG_SET_ORDER);
	if($cnt) {
		foreach($matches as $mtch) {
			if(link_compare($link,$mtch[1]) || link_compare($dlink,$mtch[1])) {
				$mention = true;
				logger('tag_deliver: mention found: ' . $mtch[2]);
			}
		}
	}

	if(! $mention)
		return;

	// send a notification

	require_once('include/enotify.php');
	notification(array(
		'type'         => NOTIFY_TAGSELF,
		'notify_flags' => $u[0]['notify-flags'],
		'language'     => $u[0]['language'],
		'to_name'      => $u[0]['username'],
		'to_email'     => $u[0]['email'],
		'uid'          => $u[0]['uid'],
		'item'         => $item,
		'link'         => $a->get_baseurl() . '/display/' . $u[0]['nickname'] . '/' . $item['id'],
		'source_name'  => $item['author-name'],
		'source_link'  => $item['author-link'],
		'source_photo' => $item['author-avatar'],
		'verb'         => ACTIVITY_TAG,
		'otype'        => 'item'
	));

	if((! $community_page) && (! $prvgroup))
		return;


	// tgroup delivery - setup a second delivery chain
	// prevent delivery looping - only proceed
	// if the message originated elsewhere and is a top-level post

	if(($item['wall']) || ($item['origin']) || ($item['id'] != $item['parent']))
		return;

	// now change this copy of the post to a forum head message and deliver to all the tgroup members


	$c = q("select name, url, thumb from contact where self = 1 and uid = %d limit 1",
		intval($u[0]['uid'])
	);
	if(! count($c))
		return;

	// also reset all the privacy bits to the forum default permissions

	$private = ($u[0]['allow_cid'] || $u[0]['allow_gid'] || $u[0]['deny_cid'] || $u[0]['deny_gid']) ? 1 : 0;

	$forum_mode = (($prvgroup) ? 2 : 1);

	q("update item set wall = 1, origin = 1, forum_mode = %d, `owner-name` = '%s', `owner-link` = '%s', `owner-avatar` = '%s', 
		`private` = %d, `allow_cid` = '%s', `allow_gid` = '%s', `deny_cid` = '%s', `deny_gid` = '%s'  where id = %d limit 1",
		intval($forum_mode),
		dbesc($c[0]['name']),
		dbesc($c[0]['url']),
		dbesc($c[0]['thumb']),
		intval($private),
		dbesc($u[0]['allow_cid']),
		dbesc($u[0]['allow_gid']),
		dbesc($u[0]['deny_cid']),
		dbesc($u[0]['deny_gid']),
		intval($item_id)
	);

	proc_run('php','include/notifier.php','tgroup',$item_id);			

}






function dfrn_deliver($owner,$contact,$atom, $dissolve = false) {

	$a = get_app();

	$idtosend = $orig_id = (($contact['dfrn-id']) ? $contact['dfrn-id'] : $contact['issued-id']);

	if($contact['duplex'] && $contact['dfrn-id'])
		$idtosend = '0:' . $orig_id;
	if($contact['duplex'] && $contact['issued-id'])
		$idtosend = '1:' . $orig_id;		

	$rino = ((function_exists('mcrypt_encrypt')) ? 1 : 0);

	$rino_enable = get_config('system','rino_encrypt');

	if(! $rino_enable)
		$rino = 0;

	$ssl_val = intval(get_config('system','ssl_policy'));
	$ssl_policy = '';

	switch($ssl_val){
		case SSL_POLICY_FULL:
			$ssl_policy = 'full';
			break;
		case SSL_POLICY_SELFSIGN:
			$ssl_policy = 'self';
			break;			
		case SSL_POLICY_NONE:
		default:
			$ssl_policy = 'none';
			break;
	}

	$url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino=1' : '');

	logger('dfrn_deliver: ' . $url);

	$xml = fetch_url($url);

	$curl_stat = $a->get_curl_code();
	if(! $curl_stat)
		return(-1); // timed out

	logger('dfrn_deliver: ' . $xml, LOGGER_DATA);

	if(! $xml)
		return 3;

	if(strpos($xml,'<?xml') === false) {
		logger('dfrn_deliver: no valid XML returned');
		logger('dfrn_deliver: returned XML: ' . $xml, LOGGER_DATA);
		return 3;
	}

	$res = parse_xml_string($xml);

	if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
		return (($res->status) ? $res->status : 3);

	$postvars     = array();
	$sent_dfrn_id = hex2bin((string) $res->dfrn_id);
	$challenge    = hex2bin((string) $res->challenge);
	$perm         = (($res->perm) ? $res->perm : null);
	$dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
	$rino_allowed = ((intval($res->rino) === 1) ? 1 : 0);
	$page         = (($owner['page-flags'] == PAGE_COMMUNITY) ? 1 : 0);

	if($owner['page-flags'] == PAGE_PRVGROUP)
		$page = 2;

	$final_dfrn_id = '';

	if($perm) {
		if((($perm == 'rw') && (! intval($contact['writable']))) 
		|| (($perm == 'r') && (intval($contact['writable'])))) {
			q("update contact set writable = %d where id = %d limit 1",
				intval(($perm == 'rw') ? 1 : 0),
				intval($contact['id'])
			);
			$contact['writable'] = (string) 1 - intval($contact['writable']);			
		}
	}

	if(($contact['duplex'] && strlen($contact['pubkey'])) 
		|| ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
		|| ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))) {
		openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['pubkey']);
		openssl_public_decrypt($challenge,$postvars['challenge'],$contact['pubkey']);
	}
	else {
		openssl_private_decrypt($sent_dfrn_id,$final_dfrn_id,$contact['prvkey']);
		openssl_private_decrypt($challenge,$postvars['challenge'],$contact['prvkey']);
	}

	$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));

	if(strpos($final_dfrn_id,':') == 1)
		$final_dfrn_id = substr($final_dfrn_id,2);

	if($final_dfrn_id != $orig_id) {
		logger('dfrn_deliver: wrong dfrn_id.');
		// did not decode properly - cannot trust this site 
		return 3;
	}

	$postvars['dfrn_id']      = $idtosend;
	$postvars['dfrn_version'] = DFRN_PROTOCOL_VERSION;
	if($dissolve)
		$postvars['dissolve'] = '1';


	if((($contact['rel']) && ($contact['rel'] != CONTACT_IS_SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
		$postvars['data'] = $atom;
		$postvars['perm'] = 'rw';
	}
	else {
		$postvars['data'] = str_replace('<dfrn:comment-allow>1','<dfrn:comment-allow>0',$atom);
		$postvars['perm'] = 'r';
	}

	$postvars['ssl_policy'] = $ssl_policy;

	if($page)
		$postvars['page'] = $page;
	
	if($rino && $rino_allowed && (! $dissolve)) {
		$key = substr(random_string(),0,16);
		$data = bin2hex(aes_encrypt($postvars['data'],$key));
		$postvars['data'] = $data;
		logger('rino: sent key = ' . $key, LOGGER_DEBUG);	


		if($dfrn_version >= 2.1) {	
			if(($contact['duplex'] && strlen($contact['pubkey'])) 
				|| ($owner['page-flags'] == PAGE_COMMUNITY && strlen($contact['pubkey']))
				|| ($contact['rel'] == CONTACT_IS_SHARING && strlen($contact['pubkey']))) {

				openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
			}
			else {
				openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
			}
		}
		else {
			if(($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == PAGE_COMMUNITY)) {
				openssl_private_encrypt($key,$postvars['key'],$contact['prvkey']);
			}
			else {
				openssl_public_encrypt($key,$postvars['key'],$contact['pubkey']);
			}
		}

		logger('md5 rawkey ' . md5($postvars['key']));

		$postvars['key'] = bin2hex($postvars['key']);
	}

	logger('dfrn_deliver: ' . "SENDING: " . print_r($postvars,true), LOGGER_DATA);

	$xml = post_url($contact['notify'],$postvars);

	logger('dfrn_deliver: ' . "RECEIVED: " . $xml, LOGGER_DATA);

	$curl_stat = $a->get_curl_code();
	if((! $curl_stat) || (! strlen($xml)))
		return(-1); // timed out

	if(($curl_stat == 503) && (stristr($a->get_curl_headers(),'retry-after')))
		return(-1);

	if(strpos($xml,'<?xml') === false) {
		logger('dfrn_deliver: phase 2: no valid XML returned');
		logger('dfrn_deliver: phase 2: returned XML: ' . $xml, LOGGER_DATA);
		return 3;
	}

	$res = parse_xml_string($xml);

	return $res->status; 
}


/**
 *
 * consume_feed - process atom feed and update anything/everything we might need to update
 *
 * $xml = the (atom) feed to consume - RSS isn't as fully supported but may work for simple feeds.
 *
 * $importer = the contact_record (joined to user_record) of the local user who owns this relationship.
 *             It is this person's stuff that is going to be updated.
 * $contact =  the person who is sending us stuff. If not set, we MAY be processing a "follow" activity
 *             from an external network and MAY create an appropriate contact record. Otherwise, we MUST 
 *             have a contact record.
 * $hub = should we find a hub declation in the feed, pass it back to our calling process, who might (or 
 *        might not) try and subscribe to it.
 * $datedir sorts in reverse order
 * $pass - by default ($pass = 0) we cannot guarantee that a parent item has been 
 *      imported prior to its children being seen in the stream unless we are certain
 *      of how the feed is arranged/ordered.
 * With $pass = 1, we only pull parent items out of the stream.
 * With $pass = 2, we only pull children (comments/likes).
 *
 * So running this twice, first with pass 1 and then with pass 2 will do the right
 * thing regardless of feed ordering. This won't be adequate in a fully-threaded
 * model where comments can have sub-threads. That would require some massive sorting
 * to get all the feed items into a mostly linear ordering, and might still require
 * recursion.  
 */

function consume_feed($xml,$importer,&$contact, &$hub, $datedir = 0, $pass = 0) {

	require_once('library/simplepie/simplepie.inc');

	if(! strlen($xml)) {
		logger('consume_feed: empty input');
		return;
	}
		
	$feed = new SimplePie();
	$feed->set_raw_data($xml);
	if($datedir)
		$feed->enable_order_by_date(true);
	else
		$feed->enable_order_by_date(false);
	$feed->init();

	if($feed->error())
		logger('consume_feed: Error parsing XML: ' . $feed->error());

	$permalink = $feed->get_permalink();

	// Check at the feed level for updated contact name and/or photo

	$name_updated  = '';
	$new_name = '';
	$photo_timestamp = '';
	$photo_url = '';
	$birthday = '';

	$hubs = $feed->get_links('hub');

	if(count($hubs))
		$hub = implode(',', $hubs);

	$rawtags = $feed->get_feed_tags( NAMESPACE_DFRN, 'owner');
	if(! $rawtags)
		$rawtags = $feed->get_feed_tags( SIMPLEPIE_NAMESPACE_ATOM_10, 'author');
	if($rawtags) {
		$elems = $rawtags[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10];
		if($elems['name'][0]['attribs'][NAMESPACE_DFRN]['updated']) {
			$name_updated = $elems['name'][0]['attribs'][NAMESPACE_DFRN]['updated'];
			$new_name = $elems['name'][0]['data'];
		} 
		if((x($elems,'link')) && ($elems['link'][0]['attribs']['']['rel'] === 'photo') && ($elems['link'][0]['attribs'][NAMESPACE_DFRN]['updated'])) {
			$photo_timestamp = datetime_convert('UTC','UTC',$elems['link'][0]['attribs'][NAMESPACE_DFRN]['updated']);
			$photo_url = $elems['link'][0]['attribs']['']['href'];
		}

		if((x($rawtags[0]['child'], NAMESPACE_DFRN)) && (x($rawtags[0]['child'][NAMESPACE_DFRN],'birthday'))) {
			$birthday = datetime_convert('UTC','UTC', $rawtags[0]['child'][NAMESPACE_DFRN]['birthday'][0]['data']);
		}
	}

	if((is_array($contact)) && ($photo_timestamp) && (strlen($photo_url)) && ($photo_timestamp > $contact['avatar-date'])) {
		logger('consume_feed: Updating photo for ' . $contact['name']);
		require_once("Photo.php");
		$photo_failure = false;
		$have_photo = false;

		$r = q("SELECT `resource-id` FROM `photo` WHERE `contact-id` = %d AND `uid` = %d LIMIT 1",
			intval($contact['id']),
			intval($contact['uid'])
		);
		if(count($r)) {
			$resource_id = $r[0]['resource-id'];
			$have_photo = true;
		}
		else {
			$resource_id = photo_new_resource();
		}
			
		$img_str = fetch_url($photo_url,true);
		$img = new Photo($img_str);
		if($img->is_valid()) {
			if($have_photo) {
				q("DELETE FROM `photo` WHERE `resource-id` = '%s' AND `contact-id` = %d AND `uid` = %d",
					dbesc($resource_id),
					intval($contact['id']),
					intval($contact['uid'])
				);
			}
				
			$img->scaleImageSquare(175);
				
			$hash = $resource_id;
			$r = $img->store($contact['uid'], $contact['id'], $hash, basename($photo_url), 'Contact Photos', 4);
				
			$img->scaleImage(80);
			$r = $img->store($contact['uid'], $contact['id'], $hash, basename($photo_url), 'Contact Photos', 5);

			$img->scaleImage(48);
			$r = $img->store($contact['uid'], $contact['id'], $hash, basename($photo_url), 'Contact Photos', 6);

			$a = get_app();

			q("UPDATE `contact` SET `avatar-date` = '%s', `photo` = '%s', `thumb` = '%s', `micro` = '%s'  
				WHERE `uid` = %d AND `id` = %d LIMIT 1",
				dbesc(datetime_convert()),
				dbesc($a->get_baseurl() . '/photo/' . $hash . '-4.jpg'),
				dbesc($a->get_baseurl() . '/photo/' . $hash . '-5.jpg'),
				dbesc($a->get_baseurl() . '/photo/' . $hash . '-6.jpg'),
				intval($contact['uid']),
				intval($contact['id'])
			);
		}
	}

	if((is_array($contact)) && ($name_updated) && (strlen($new_name)) && ($name_updated > $contact['name-date'])) {
		$r = q("select * from contact where uid = %d and id = %d limit 1",
			intval($contact['uid']),
			intval($contact['id'])
		);

		$x = q("UPDATE `contact` SET `name` = '%s', `name-date` = '%s' WHERE `uid` = %d AND `id` = %d LIMIT 1",
			dbesc(notags(trim($new_name))),
			dbesc(datetime_convert()),
			intval($contact['uid']),
			intval($contact['id'])
		);

		// do our best to update the name on content items

		if(count($r)) {
			q("update item set `author-name` = '%s' where `author-name` = '%s' and `author-link` = '%s' and uid = %d",
				dbesc(notags(trim($new_name))),
				dbesc($r[0]['name']),
				dbesc($r[0]['url']),
				intval($contact['uid'])
			);
		}
	}

	if(strlen($birthday)) {
		if(substr($birthday,0,4) != $contact['bdyear']) {
			logger('consume_feed: updating birthday: ' . $birthday);

			/**
			 *
			 * Add new birthday event for this person
			 *
			 * $bdtext is just a readable placeholder in case the event is shared
			 * with others. We will replace it during presentation to our $importer
			 * to contain a sparkle link and perhaps a photo. 
			 *
			 */
			 
			$bdtext = t('Birthday:') . ' [url=' . $contact['url'] . ']' . $contact['name'] . '[/url]' ;


			$r = q("INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`desc`,`type`)
				VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s' ) ",
				intval($contact['uid']),
			 	intval($contact['id']),
				dbesc(datetime_convert()),
				dbesc(datetime_convert()),
				dbesc(datetime_convert('UTC','UTC', $birthday)),
				dbesc(datetime_convert('UTC','UTC', $birthday . ' + 1 day ')),
				dbesc($bdtext),
				dbesc('birthday')
			);
			

			// update bdyear

			q("UPDATE `contact` SET `bdyear` = '%s' WHERE `uid` = %d AND `id` = %d LIMIT 1",
				dbesc(substr($birthday,0,4)),
				intval($contact['uid']),
				intval($contact['id'])
			);

			// This function is called twice without reloading the contact
			// Make sure we only create one event. This is why &$contact 
			// is a reference var in this function

			$contact['bdyear'] = substr($birthday,0,4);
		}

	}

	$community_page = 0;
	$rawtags = $feed->get_feed_tags( NAMESPACE_DFRN, 'community');
	if($rawtags) {
		$community_page = intval($rawtags[0]['data']);
	}
	if(is_array($contact) && intval($contact['forum']) != $community_page) {
		q("update contact set forum = %d where id = %d limit 1",
			intval($community_page),
			intval($contact['id'])
		);
		$contact['forum'] = (string) $community_page;
	}


	// process any deleted entries

	$del_entries = $feed->get_feed_tags(NAMESPACE_TOMB, 'deleted-entry');
	if(is_array($del_entries) && count($del_entries) && $pass != 2) {
		foreach($del_entries as $dentry) {
			$deleted = false;
			if(isset($dentry['attribs']['']['ref'])) {
				$uri = $dentry['attribs']['']['ref'];
				$deleted = true;
				if(isset($dentry['attribs']['']['when'])) {
					$when = $dentry['attribs']['']['when'];
					$when = datetime_convert('UTC','UTC', $when, 'Y-m-d H:i:s');
				}
				else
					$when = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
			}
			if($deleted && is_array($contact)) {
				$r = q("SELECT `item`.*, `contact`.`self` FROM `item` left join `contact` on `item`.`contact-id` = `contact`.`id` 
					WHERE `uri` = '%s' AND `item`.`uid` = %d AND `contact-id` = %d AND NOT `item`.`file` LIKE '%%[%%' LIMIT 1",
					dbesc($uri),
					intval($importer['uid']),
					intval($contact['id'])
				);
				if(count($r)) {
					$item = $r[0];

					if(! $item['deleted'])
						logger('consume_feed: deleting item ' . $item['id'] . ' uri=' . $item['uri'], LOGGER_DEBUG);

					if(($item['verb'] === ACTIVITY_TAG) && ($item['object-type'] === ACTIVITY_OBJ_TAGTERM)) {
						$xo = parse_xml_string($item['object'],false);
						$xt = parse_xml_string($item['target'],false);
						if($xt->type === ACTIVITY_OBJ_NOTE) {
							$i = q("select * from `item` where uri = '%s' and uid = %d limit 1",
								dbesc($xt->id),
								intval($importer['importer_uid'])
							);
							if(count($i)) {

								// For tags, the owner cannot remove the tag on the author's copy of the post.

								$owner_remove = (($item['contact-id'] == $i[0]['contact-id']) ? true: false);
								$author_remove = (($item['origin'] && $item['self']) ? true : false);
								$author_copy = (($item['origin']) ? true : false);

								if($owner_remove && $author_copy)
									continue;
								if($author_remove || $owner_remove) {
									$tags = explode(',',$i[0]['tag']);
									$newtags = array();
									if(count($tags)) {
										foreach($tags as $tag)
											if(trim($tag) !== trim($xo->body))
												$newtags[] = trim($tag);
									}
									q("update item set tag = '%s' where id = %d limit 1",
										dbesc(implode(',',$newtags)),
										intval($i[0]['id'])
									);
								}
							}
						}
					}

					if($item['uri'] == $item['parent-uri']) {
						$r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
							`body` = '', `title` = ''
							WHERE `parent-uri` = '%s' AND `uid` = %d",
							dbesc($when),
							dbesc(datetime_convert()),
							dbesc($item['uri']),
							intval($importer['uid'])
						);
					}
					else {
						$r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s',
							`body` = '', `title` = '' 
							WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							dbesc($when),
							dbesc(datetime_convert()),
							dbesc($uri),
							intval($importer['uid'])
						);
						if($item['last-child']) {
							// ensure that last-child is set in case the comment that had it just got wiped.
							q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
								dbesc(datetime_convert()),
								dbesc($item['parent-uri']),
								intval($item['uid'])
							);
							// who is the last child now? 
							$r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `moderated` = 0 AND `uid` = %d 
								ORDER BY `created` DESC LIMIT 1",
									dbesc($item['parent-uri']),
									intval($importer['uid'])
							);
							if(count($r)) {
								q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d LIMIT 1",
									intval($r[0]['id'])
								);
							}
						}	
					}
				}	
			}
		}
	}

	// Now process the feed

	if($feed->get_item_quantity()) {		

		logger('consume_feed: feed item count = ' . $feed->get_item_quantity());

        // in inverse date order
		if ($datedir)
			$items = array_reverse($feed->get_items());
		else
			$items = $feed->get_items();


		foreach($items as $item) {

			$is_reply = false;		
			$item_id = $item->get_id();
			$rawthread = $item->get_item_tags( NAMESPACE_THREAD,'in-reply-to');
			if(isset($rawthread[0]['attribs']['']['ref'])) {
				$is_reply = true;
				$parent_uri = $rawthread[0]['attribs']['']['ref'];
			}

			if(($is_reply) && is_array($contact)) {

				if($pass == 1)
					continue;

				// Have we seen it? If not, import it.
	
				$item_id  = $item->get_id();
				$datarray = get_atom_elements($feed,$item);


				if((! x($datarray,'author-name')) && ($contact['network'] != NETWORK_DFRN))
					$datarray['author-name'] = $contact['name'];
				if((! x($datarray,'author-link')) && ($contact['network'] != NETWORK_DFRN))
					$datarray['author-link'] = $contact['url'];
				if((! x($datarray,'author-avatar')) && ($contact['network'] != NETWORK_DFRN))
					$datarray['author-avatar'] = $contact['thumb'];

				if((! x($datarray,'author-name')) || (! x($datarray,'author-link'))) {
					logger('consume_feed: no author information! ' . print_r($datarray,true));
					continue;
				}

				$r = q("SELECT `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
					dbesc($item_id),
					intval($importer['uid'])
				);

				// Update content if 'updated' changes

				if(count($r)) {
					if((x($datarray,'edited') !== false) && (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {  
						$r = q("UPDATE `item` SET `title` = '%s', `body` = '%s', `tag` = '%s', `edited` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							dbesc($datarray['title']),
							dbesc($datarray['body']),
							dbesc($datarray['tag']),
							dbesc(datetime_convert('UTC','UTC',$datarray['edited'])),
							dbesc($item_id),
							intval($importer['uid'])
						);
					}

					// update last-child if it changes

					$allow = $item->get_item_tags( NAMESPACE_DFRN, 'comment-allow');
					if(($allow) && ($allow[0]['data'] != $r[0]['last-child'])) {
						$r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d",
							dbesc(datetime_convert()),
							dbesc($parent_uri),
							intval($importer['uid'])
						);
						$r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s'  WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							intval($allow[0]['data']),
							dbesc(datetime_convert()),
							dbesc($item_id),
							intval($importer['uid'])
						);
					}
					continue;
				}

				$force_parent = false;
				if($contact['network'] === NETWORK_OSTATUS || stristr($contact['url'],'twitter.com')) {
					if($contact['network'] === NETWORK_OSTATUS)
						$force_parent = true;
					if(strlen($datarray['title']))
						unset($datarray['title']);
					$r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d",
						dbesc(datetime_convert()),
						dbesc($parent_uri),
						intval($importer['uid'])
					);
					$datarray['last-child'] = 1;
				}

				if(($contact['network'] === NETWORK_FEED) || (! strlen($contact['notify']))) {
					// one way feed - no remote comment ability
					$datarray['last-child'] = 0;
				}
				$datarray['parent-uri'] = $parent_uri;
				$datarray['uid'] = $importer['uid'];
				$datarray['contact-id'] = $contact['id'];
				if((activity_match($datarray['verb'],ACTIVITY_LIKE)) || (activity_match($datarray['verb'],ACTIVITY_DISLIKE))) {
					$datarray['type'] = 'activity';
					$datarray['gravity'] = GRAVITY_LIKE;
					// only one like or dislike per person
					$r = q("select id from item where uid = %d and `contact-id` = %d and verb ='%s' and deleted = 0 limit 1",
						intval($datarray['uid']),
						intval($datarray['contact-id']),
						dbesc($datarray['verb'])
					);
					if($r && count($r))
						continue; 
				}

				if(($datarray['verb'] === ACTIVITY_TAG) && ($datarray['object-type'] === ACTIVITY_OBJ_TAGTERM)) {
					$xo = parse_xml_string($datarray['object'],false);
					$xt = parse_xml_string($datarray['target'],false);

					if($xt->type == ACTIVITY_OBJ_NOTE) {
						$r = q("select * from item where `uri` = '%s' AND `uid` = %d limit 1",
							dbesc($xt->id),
							intval($importer['importer_uid'])
						);
						if(! count($r))
							continue;

						// extract tag, if not duplicate, add to parent item
						if($xo->id && $xo->content) {
							$newtag = '#[url=' . $xo->id . ']'. $xo->content . '[/url]';
							if(! (stristr($r[0]['tag'],$newtag))) {
								q("UPDATE item SET tag = '%s' WHERE id = %d LIMIT 1",
									dbesc($r[0]['tag'] . (strlen($r[0]['tag']) ? ',' : '') . $newtag),
									intval($r[0]['id'])
								);
							}
						}
					}
				}

				$r = item_store($datarray,$force_parent);
				continue;
			}

			else {

				// Head post of a conversation. Have we seen it? If not, import it.

				$item_id  = $item->get_id();

				$datarray = get_atom_elements($feed,$item);

				if(is_array($contact)) {
					if((! x($datarray,'author-name')) && ($contact['network'] != NETWORK_DFRN))
						$datarray['author-name'] = $contact['name'];
					if((! x($datarray,'author-link')) && ($contact['network'] != NETWORK_DFRN))
						$datarray['author-link'] = $contact['url'];
					if((! x($datarray,'author-avatar')) && ($contact['network'] != NETWORK_DFRN))
						$datarray['author-avatar'] = $contact['thumb'];
				}

				if((! x($datarray,'author-name')) || (! x($datarray,'author-link'))) {
					logger('consume_feed: no author information! ' . print_r($datarray,true));
					continue;
				}

				// special handling for events

				if((x($datarray,'object-type')) && ($datarray['object-type'] === ACTIVITY_OBJ_EVENT)) {
					$ev = bbtoevent($datarray['body']);
					if(x($ev,'desc') && x($ev,'start')) {
						$ev['uid'] = $importer['uid'];
						$ev['uri'] = $item_id;
						$ev['edited'] = $datarray['edited'];
						$ev['private'] = $datarray['private'];

						if(is_array($contact))
							$ev['cid'] = $contact['id'];
						$r = q("SELECT * FROM `event` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							dbesc($item_id),
							intval($importer['uid'])
						);
						if(count($r))
							$ev['id'] = $r[0]['id'];
						$xyz = event_store($ev);
						continue;
					}
				}

				$r = q("SELECT `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
					dbesc($item_id),
					intval($importer['uid'])
				);

				// Update content if 'updated' changes

				if(count($r)) {
					if((x($datarray,'edited') !== false) && (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {  
						$r = q("UPDATE `item` SET `title` = '%s', `body` = '%s', `tag` = '%s', `edited` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							dbesc($datarray['title']),
							dbesc($datarray['body']),
							dbesc($datarray['tag']),
							dbesc(datetime_convert('UTC','UTC',$datarray['edited'])),
							dbesc($item_id),
							intval($importer['uid'])
						);
					}

					// update last-child if it changes

					$allow = $item->get_item_tags( NAMESPACE_DFRN, 'comment-allow');
					if($allow && $allow[0]['data'] != $r[0]['last-child']) {
						$r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							intval($allow[0]['data']),
							dbesc(datetime_convert()),
							dbesc($item_id),
							intval($importer['uid'])
						);
					}
					continue;
				}

				if(activity_match($datarray['verb'],ACTIVITY_FOLLOW)) {
					logger('consume-feed: New follower');
					new_follower($importer,$contact,$datarray,$item);
					return;
				}
				if(activity_match($datarray['verb'],ACTIVITY_UNFOLLOW))  {
					lose_follower($importer,$contact,$datarray,$item);
					return;
				}

				if(activity_match($datarray['verb'],ACTIVITY_REQ_FRIEND)) {
					logger('consume-feed: New friend request');
					new_follower($importer,$contact,$datarray,$item,true);
					return;
				}
				if(activity_match($datarray['verb'],ACTIVITY_UNFRIEND))  {
					lose_sharer($importer,$contact,$datarray,$item);
					return;
				}


				if(! is_array($contact))
					return;

				if($contact['network'] === NETWORK_OSTATUS || stristr($contact['url'],'twitter.com')) {
					if(strlen($datarray['title']))
						unset($datarray['title']);
					$datarray['last-child'] = 1;
				}

				if(($contact['network'] === NETWORK_FEED) || (! strlen($contact['notify']))) {
					// one way feed - no remote comment ability
					$datarray['last-child'] = 0;
				}

				// This is my contact on another system, but it's really me.
				// Turn this into a wall post.

				if($contact['remote_self'])
					$datarray['wall'] = 1;

				$datarray['parent-uri'] = $item_id;
				$datarray['uid'] = $importer['uid'];
				$datarray['contact-id'] = $contact['id'];

				if(! link_compare($datarray['owner-link'],$contact['url'])) {
					// The item owner info is not our contact. It's OK and is to be expected if this is a tgroup delivery, 
					// but otherwise there's a possible data mixup on the sender's system.
					// the tgroup delivery code called from item_store will correct it if it's a forum,
					// but we're going to unconditionally correct it here so that the post will always be owned by our contact. 
					logger('consume_feed: Correcting item owner.', LOGGER_DEBUG);
					$datarray['owner-name']   = $contact['name'];
					$datarray['owner-link']   = $contact['url'];
					$datarray['owner-avatar'] = $contact['thumb'];
				}

				$r = item_store($datarray);
				continue;

			}
		}
	}
}

function local_delivery($importer,$data) {

	$a = get_app();

	if($importer['readonly']) {
		// We aren't receiving stuff from this person. But we will quietly ignore them
		// rather than a blatant "go away" message.
		logger('local_delivery: ignoring');
		return 0;
		//NOTREACHED
	}

	// Consume notification feed. This may differ from consuming a public feed in several ways
	// - might contain email or friend suggestions
	// - might contain remote followup to our message
	//		- in which case we need to accept it and then notify other conversants
	// - we may need to send various email notifications

	$feed = new SimplePie();
	$feed->set_raw_data($data);
	$feed->enable_order_by_date(false);
	$feed->init();

/*
	// Currently unsupported - needs a lot of work
	$reloc = $feed->get_feed_tags( NAMESPACE_DFRN, 'relocate' );
	if(isset($reloc[0]['child'][NAMESPACE_DFRN])) {
		$base = $reloc[0]['child'][NAMESPACE_DFRN];
		$newloc = array();
		$newloc['uid'] = $importer['importer_uid'];
		$newloc['cid'] = $importer['id'];
		$newloc['name'] = notags(unxmlify($base['name'][0]['data']));
		$newloc['photo'] = notags(unxmlify($base['photo'][0]['data']));
		$newloc['url'] = notags(unxmlify($base['url'][0]['data']));
		$newloc['request'] = notags(unxmlify($base['request'][0]['data']));
		$newloc['confirm'] = notags(unxmlify($base['confirm'][0]['data']));
		$newloc['notify'] = notags(unxmlify($base['notify'][0]['data']));
		$newloc['poll'] = notags(unxmlify($base['poll'][0]['data']));
		$newloc['site-pubkey'] = notags(unxmlify($base['site-pubkey'][0]['data']));
		$newloc['pubkey'] = notags(unxmlify($base['pubkey'][0]['data']));
		$newloc['prvkey'] = notags(unxmlify($base['prvkey'][0]['data']));
		
		// TODO
		// merge with current record, current contents have priority
		// update record, set url-updated
		// update profile photos
		// schedule a scan?

	}
*/

	// handle friend suggestion notification

	$sugg = $feed->get_feed_tags( NAMESPACE_DFRN, 'suggest' );
	if(isset($sugg[0]['child'][NAMESPACE_DFRN])) {
		$base = $sugg[0]['child'][NAMESPACE_DFRN];
		$fsugg = array();
		$fsugg['uid'] = $importer['importer_uid'];
		$fsugg['cid'] = $importer['id'];
		$fsugg['name'] = notags(unxmlify($base['name'][0]['data']));
		$fsugg['photo'] = notags(unxmlify($base['photo'][0]['data']));
		$fsugg['url'] = notags(unxmlify($base['url'][0]['data']));
		$fsugg['request'] = notags(unxmlify($base['request'][0]['data']));
		$fsugg['body'] = escape_tags(unxmlify($base['note'][0]['data']));

		// Does our member already have a friend matching this description?

		$r = q("SELECT * FROM `contact` WHERE `name` = '%s' AND `nurl` = '%s' AND `uid` = %d LIMIT 1",
			dbesc($fsugg['name']),
			dbesc(normalise_link($fsugg['url'])),
			intval($fsugg['uid'])
		);
		if(count($r))
			return 0;

		// Do we already have an fcontact record for this person?

		$fid = 0;
		$r = q("SELECT * FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
			dbesc($fsugg['url']),
			dbesc($fsugg['name']),
			dbesc($fsugg['request'])
		);
		if(count($r)) {
			$fid = $r[0]['id'];

			// OK, we do. Do we already have an introduction for this person ?
			$r = q("select id from intro where uid = %d and fid = %d limit 1",
				intval($fsugg['uid']),
				intval($fid)
			);
			if(count($r))
				return 0;
		}
		if(! $fid)
			$r = q("INSERT INTO `fcontact` ( `name`,`url`,`photo`,`request` ) VALUES ( '%s', '%s', '%s', '%s' ) ",
			dbesc($fsugg['name']),
			dbesc($fsugg['url']),
			dbesc($fsugg['photo']),
			dbesc($fsugg['request'])
		);
		$r = q("SELECT * FROM `fcontact` WHERE `url` = '%s' AND `name` = '%s' AND `request` = '%s' LIMIT 1",
			dbesc($fsugg['url']),
			dbesc($fsugg['name']),
			dbesc($fsugg['request'])
		);
		if(count($r)) {
			$fid = $r[0]['id'];
		}
		// database record did not get created. Quietly give up.
		else
			return 0;


		$hash = random_string();
 
		$r = q("INSERT INTO `intro` ( `uid`, `fid`, `contact-id`, `note`, `hash`, `datetime`, `blocked` )
			VALUES( %d, %d, %d, '%s', '%s', '%s', %d )",
			intval($fsugg['uid']),
			intval($fid),
			intval($fsugg['cid']),
			dbesc($fsugg['body']),
			dbesc($hash),
			dbesc(datetime_convert()),
			intval(0)
		);

		notification(array(
			'type'         => NOTIFY_SUGGEST,
			'notify_flags' => $importer['notify-flags'],
			'language'     => $importer['language'],
			'to_name'      => $importer['username'],
			'to_email'     => $importer['email'],
			'uid'          => $importer['importer_uid'],
			'item'         => $fsugg,
			'link'         => $a->get_baseurl() . '/notifications/intros',
			'source_name'  => $importer['name'],
			'source_link'  => $importer['url'],
			'source_photo' => $importer['photo'],
			'verb'         => ACTIVITY_REQ_FRIEND,
			'otype'        => 'intro'
		));

		return 0;
	}

	$ismail = false;

	$rawmail = $feed->get_feed_tags( NAMESPACE_DFRN, 'mail' );
	if(isset($rawmail[0]['child'][NAMESPACE_DFRN])) {

		logger('local_delivery: private message received');

		$ismail = true;
		$base = $rawmail[0]['child'][NAMESPACE_DFRN];

		$msg = array();
		$msg['uid'] = $importer['importer_uid'];
		$msg['from-name'] = notags(unxmlify($base['sender'][0]['child'][NAMESPACE_DFRN]['name'][0]['data']));
		$msg['from-photo'] = notags(unxmlify($base['sender'][0]['child'][NAMESPACE_DFRN]['avatar'][0]['data']));
		$msg['from-url'] = notags(unxmlify($base['sender'][0]['child'][NAMESPACE_DFRN]['uri'][0]['data']));
		$msg['contact-id'] = $importer['id'];
		$msg['title'] = notags(unxmlify($base['subject'][0]['data']));
		$msg['body'] = escape_tags(unxmlify($base['content'][0]['data']));
		$msg['seen'] = 0;
		$msg['replied'] = 0;
		$msg['uri'] = notags(unxmlify($base['id'][0]['data']));
		$msg['parent-uri'] = notags(unxmlify($base['in-reply-to'][0]['data']));
		$msg['created'] = datetime_convert(notags(unxmlify('UTC','UTC',$base['sentdate'][0]['data'])));
		
		dbesc_array($msg);

		$r = dbq("INSERT INTO `mail` (`" . implode("`, `", array_keys($msg)) 
			. "`) VALUES ('" . implode("', '", array_values($msg)) . "')" );

		// send notifications.

		require_once('include/enotify.php');

		$notif_params = array(
			'type' => NOTIFY_MAIL,
			'notify_flags' => $importer['notify-flags'],
			'language' => $importer['language'],
			'to_name' => $importer['username'],
			'to_email' => $importer['email'],
			'uid' => $importer['importer_uid'],
			'item' => $msg,
			'source_name' => $msg['from-name'],
			'source_link' => $importer['url'],
			'source_photo' => $importer['thumb'],
			'verb' => ACTIVITY_POST,
			'otype' => 'mail'
		);
			
		notification($notif_params);
		return 0;

		// NOTREACHED
	}	

	$community_page = 0;
	$rawtags = $feed->get_feed_tags( NAMESPACE_DFRN, 'community');
	if($rawtags) {
		$community_page = intval($rawtags[0]['data']);
	}
	if(intval($importer['forum']) != $community_page) {
		q("update contact set forum = %d where id = %d limit 1",
			intval($community_page),
			intval($importer['id'])
		);
		$importer['forum'] = (string) $community_page;
	}
	
	logger('local_delivery: feed item count = ' . $feed->get_item_quantity());

	// process any deleted entries

	$del_entries = $feed->get_feed_tags(NAMESPACE_TOMB, 'deleted-entry');
	if(is_array($del_entries) && count($del_entries)) {
		foreach($del_entries as $dentry) {
			$deleted = false;
			if(isset($dentry['attribs']['']['ref'])) {
				$uri = $dentry['attribs']['']['ref'];
				$deleted = true;
				if(isset($dentry['attribs']['']['when'])) {
					$when = $dentry['attribs']['']['when'];
					$when = datetime_convert('UTC','UTC', $when, 'Y-m-d H:i:s');
				}
				else
					$when = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
			}
			if($deleted) {

				$r = q("SELECT `item`.*, `contact`.`self` FROM `item` left join contact on `item`.`contact-id` = `contact`.`id`
					WHERE `uri` = '%s' AND `item`.`uid` = %d AND `contact-id` = %d AND NOT `item`.`file` LIKE '%%[%%' LIMIT 1",
					dbesc($uri),
					intval($importer['importer_uid']),
					intval($importer['id'])
				);

				if(count($r)) {
					$item = $r[0];

					if($item['deleted'])
						continue;

					logger('local_delivery: deleting item ' . $item['id'] . ' uri=' . $item['uri'], LOGGER_DEBUG);

					if(($item['verb'] === ACTIVITY_TAG) && ($item['object-type'] === ACTIVITY_OBJ_TAGTERM)) {
						$xo = parse_xml_string($item['object'],false);
						$xt = parse_xml_string($item['target'],false);

						if($xt->type === ACTIVITY_OBJ_NOTE) {
							$i = q("select * from `item` where uri = '%s' and uid = %d limit 1",
								dbesc($xt->id),
								intval($importer['importer_uid'])
							);
							if(count($i)) {

								// For tags, the owner cannot remove the tag on the author's copy of the post.
								
								$owner_remove = (($item['contact-id'] == $i[0]['contact-id']) ? true: false);
								$author_remove = (($item['origin'] && $item['self']) ? true : false);
								$author_copy = (($item['origin']) ? true : false); 

								if($owner_remove && $author_copy)
									continue;
								if($author_remove || $owner_remove) {								
									$tags = explode(',',$i[0]['tag']);
									$newtags = array();
									if(count($tags)) {
										foreach($tags as $tag)
											if(trim($tag) !== trim($xo->body))
												$newtags[] = trim($tag);
									}
									q("update item set tag = '%s' where id = %d limit 1",
										dbesc(implode(',',$newtags)),
										intval($i[0]['id'])
									);
								}
							}
						}
					}

					if($item['uri'] == $item['parent-uri']) {
						$r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s'
							WHERE `parent-uri` = '%s' AND `uid` = %d",
							dbesc($when),
							dbesc(datetime_convert()),
							dbesc($item['uri']),
							intval($importer['importer_uid'])
						);
					}
					else {
						$r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s' 
							WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							dbesc($when),
							dbesc(datetime_convert()),
							dbesc($uri),
							intval($importer['importer_uid'])
						);
						if($item['last-child']) {
							// ensure that last-child is set in case the comment that had it just got wiped.
							q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
								dbesc(datetime_convert()),
								dbesc($item['parent-uri']),
								intval($item['uid'])
							);
							// who is the last child now? 
							$r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `uid` = %d
								ORDER BY `created` DESC LIMIT 1",
									dbesc($item['parent-uri']),
									intval($importer['importer_uid'])
							);
							if(count($r)) {
								q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d LIMIT 1",
									intval($r[0]['id'])
								);
							}	
						}
					}	
				}
			}
		}
	}


	foreach($feed->get_items() as $item) {

		$is_reply = false;		
		$item_id = $item->get_id();
		$rawthread = $item->get_item_tags( NAMESPACE_THREAD, 'in-reply-to');
		if(isset($rawthread[0]['attribs']['']['ref'])) {
			$is_reply = true;
			$parent_uri = $rawthread[0]['attribs']['']['ref'];
		}

		if($is_reply) {
			$community = false;

			if($importer['page-flags'] == PAGE_COMMUNITY || $importer['page-flags'] == PAGE_PRVGROUP ) {
				$sql_extra = '';
				$community = true;
				logger('local_delivery: possible community reply');
			}
			else
				$sql_extra = " and contact.self = 1 and item.wall = 1 ";
 
			// was the top-level post for this reply written by somebody on this site? 
			// Specifically, the recipient? 

			$is_a_remote_comment = false;

			$r = q("select `item`.`id`, `item`.`uri`, `item`.`tag`, `item`.`forum_mode`,`item`.`origin`,`item`.`wall`, 
				`contact`.`name`, `contact`.`url`, `contact`.`thumb` from `item` 
				LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id` 
				WHERE `item`.`uri` = '%s' AND `item`.`parent-uri` = '%s'
				AND `item`.`uid` = %d 
				$sql_extra
				LIMIT 1",
				dbesc($parent_uri),
				dbesc($parent_uri),
				intval($importer['importer_uid'])
			);
			if($r && count($r))
				$is_a_remote_comment = true;			

			// Does this have the characteristics of a community or private group comment?
			// If it's a reply to a wall post on a community/prvgroup page it's a 
			// valid community comment. Also forum_mode makes it valid for sure. 
			// If neither, it's not.

			if($is_a_remote_comment && $community) {
				if((! $r[0]['forum_mode']) && (! $r[0]['wall'])) {
					$is_a_remote_comment = false;
					logger('local_delivery: not a community reply');
				}
			}

			if($is_a_remote_comment) {
				logger('local_delivery: received remote comment');
				$is_like = false;
				// remote reply to our post. Import and then notify everybody else.

				$datarray = get_atom_elements($feed,$item);

				$r = q("SELECT `id`, `uid`, `last-child`, `edited`, `body`  FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
					dbesc($item_id),
					intval($importer['importer_uid'])
				);

				// Update content if 'updated' changes

				if(count($r)) {
					$iid = $r[0]['id'];
					if((x($datarray,'edited') !== false) && (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {  
						logger('received updated comment' , LOGGER_DEBUG);
						$r = q("UPDATE `item` SET `title` = '%s', `body` = '%s', `tag` = '%s', `edited` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							dbesc($datarray['title']),
							dbesc($datarray['body']),
							dbesc($datarray['tag']),
							dbesc(datetime_convert('UTC','UTC',$datarray['edited'])),
							dbesc($item_id),
							intval($importer['importer_uid'])
						);

						proc_run('php',"include/notifier.php","comment-import",$iid);

					}

					continue;
				}


				// TODO: make this next part work against both delivery threads of a community post

//				if((! link_compare($datarray['author-link'],$importer['url'])) && (! $community)) {
//					logger('local_delivery: received relay claiming to be from ' . $importer['url'] . ' however comment author url is ' . $datarray['author-link'] ); 
					// they won't know what to do so don't report an error. Just quietly die.
//					return 0;
//				}					

				// our user with $importer['importer_uid'] is the owner

				$own = q("select name,url,thumb from contact where uid = %d and self = 1 limit 1",
					intval($importer['importer_uid'])
				);


				$datarray['type'] = 'remote-comment';
				$datarray['wall'] = 1;
				$datarray['parent-uri'] = $parent_uri;
				$datarray['uid'] = $importer['importer_uid'];
				$datarray['owner-name'] = $own[0]['name'];
				$datarray['owner-link'] = $own[0]['url'];
				$datarray['owner-avatar'] = $own[0]['thumb'];
				$datarray['contact-id'] = $importer['id'];

				if(($datarray['verb'] === ACTIVITY_LIKE) || ($datarray['verb'] === ACTIVITY_DISLIKE)) {
					$is_like = true;
					$datarray['type'] = 'activity';
					$datarray['gravity'] = GRAVITY_LIKE;
					$datarray['last-child'] = 0;
					// only one like or dislike per person
					$r = q("select id from item where uid = %d and `contact-id` = %d and verb ='%s' and deleted = 0 limit 1",
						intval($datarray['uid']),
						intval($datarray['contact-id']),
						dbesc($datarray['verb'])
					);
					if($r && count($r))
						continue; 
				}

				if(($datarray['verb'] === ACTIVITY_TAG) && ($datarray['object-type'] === ACTIVITY_OBJ_TAGTERM)) {
					
					$xo = parse_xml_string($datarray['object'],false);
					$xt = parse_xml_string($datarray['target'],false);

					if(($xt->type == ACTIVITY_OBJ_NOTE) && ($xt->id)) {

						// fetch the parent item

						$tagp = q("select * from item where uri = '%s' and uid = %d limit 1",
							dbesc($xt->id),
							intval($importer['importer_uid'])
						);
						if(! count($tagp))
							continue;	

						// extract tag, if not duplicate, and this user allows tags, add to parent item						

						if($xo->id && $xo->content) {
							$newtag = '#[url=' . $xo->id . ']'. $xo->content . '[/url]';
							if(! (stristr($tagp[0]['tag'],$newtag))) {
								$i = q("SELECT `blocktags` FROM `user` where `uid` = %d LIMIT 1",
									intval($importer['importer_uid'])
								);
								if(count($i) && ! intval($i[0]['blocktags'])) {
									q("UPDATE item SET tag = '%s', `edited` = '%s' WHERE id = %d LIMIT 1",
										dbesc($tagp[0]['tag'] . (strlen($tagp[0]['tag']) ? ',' : '') . $newtag),
										intval($tagp[0]['id']),
										dbesc(datetime_convert())
									);
								}
							}
						}													
					}
				}

// 				if($community) {
//					$newtag = '@[url=' . $a->get_baseurl() . '/profile/' . $importer['nickname'] . ']' . $importer['username'] . '[/url]';
//					if(! stristr($datarray['tag'],$newtag)) {
//						if(strlen($datarray['tag']))
//							$datarray['tag'] .= ',';
//						$datarray['tag'] .= $newtag;
//					}
//				}


				$posted_id = item_store($datarray);
				$parent = 0;

				if($posted_id) {
					$r = q("SELECT `parent` FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
						intval($posted_id),
						intval($importer['importer_uid'])
					);
					if(count($r))
						$parent = $r[0]['parent'];
			
					if(! $is_like) {
						$r1 = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `uid` = %d AND `parent` = %d",
							dbesc(datetime_convert()),
							intval($importer['importer_uid']),
							intval($r[0]['parent'])
						);

						$r2 = q("UPDATE `item` SET `last-child` = 1, `changed` = '%s' WHERE `uid` = %d AND `id` = %d LIMIT 1",
							dbesc(datetime_convert()),
							intval($importer['importer_uid']),
							intval($posted_id)
						);
					}

					if($posted_id && $parent) {
				
						proc_run('php',"include/notifier.php","comment-import","$posted_id");
					
						if((! $is_like) && (! $importer['self'])) {

							require_once('include/enotify.php');

							notification(array(
								'type'         => NOTIFY_COMMENT,
								'notify_flags' => $importer['notify-flags'],
								'language'     => $importer['language'],
								'to_name'      => $importer['username'],
								'to_email'     => $importer['email'],
								'uid'          => $importer['importer_uid'],
								'item'         => $datarray,
								'link'		   => $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $posted_id,
								'source_name'  => stripslashes($datarray['author-name']),
								'source_link'  => $datarray['author-link'],
								'source_photo' => ((link_compare($datarray['author-link'],$importer['url'])) 
									? $importer['thumb'] : $datarray['author-avatar']),
								'verb'         => ACTIVITY_POST,
								'otype'        => 'item',
								'parent'       => $parent,

							));

						}
					}

					return 0;
					// NOTREACHED
				}
			}
			else {

				// regular comment that is part of this total conversation. Have we seen it? If not, import it.

				$item_id  = $item->get_id();
				$datarray = get_atom_elements($feed,$item);

				$r = q("SELECT `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
					dbesc($item_id),
					intval($importer['importer_uid'])
				);

				// Update content if 'updated' changes

				if(count($r)) {
					if((x($datarray,'edited') !== false) && (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {  
						$r = q("UPDATE `item` SET `title` = '%s', `body` = '%s', `tag` = '%s', `edited` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							dbesc($datarray['title']),
							dbesc($datarray['body']),
							dbesc($datarray['tag']),
							dbesc(datetime_convert('UTC','UTC',$datarray['edited'])),
							dbesc($item_id),
							intval($importer['importer_uid'])
						);
					}

					// update last-child if it changes

					$allow = $item->get_item_tags( NAMESPACE_DFRN, 'comment-allow');
					if(($allow) && ($allow[0]['data'] != $r[0]['last-child'])) {
						$r = q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d",
							dbesc(datetime_convert()),
							dbesc($parent_uri),
							intval($importer['importer_uid'])
						);
						$r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s'  WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
							intval($allow[0]['data']),
							dbesc(datetime_convert()),
							dbesc($item_id),
							intval($importer['importer_uid'])
						);
					}
					continue;
				}

				$datarray['parent-uri'] = $parent_uri;
				$datarray['uid'] = $importer['importer_uid'];
				$datarray['contact-id'] = $importer['id'];
				if(($datarray['verb'] == ACTIVITY_LIKE) || ($datarray['verb'] == ACTIVITY_DISLIKE)) {
					$datarray['type'] = 'activity';
					$datarray['gravity'] = GRAVITY_LIKE;
					// only one like or dislike per person
					$r = q("select id from item where uid = %d and `contact-id` = %d and verb ='%s' and deleted = 0 limit 1",
						intval($datarray['uid']),
						intval($datarray['contact-id']),
						dbesc($datarray['verb'])
					);
					if($r && count($r))
						continue; 

				}

				if(($datarray['verb'] === ACTIVITY_TAG) && ($datarray['object-type'] === ACTIVITY_OBJ_TAGTERM)) {

					$xo = parse_xml_string($datarray['object'],false);
					$xt = parse_xml_string($datarray['target'],false);

					if($xt->type == ACTIVITY_OBJ_NOTE) {
						$r = q("select * from item where `uri` = '%s' AND `uid` = %d limit 1",
							dbesc($xt->id),
							intval($importer['importer_uid'])
						);
						if(! count($r))
							continue;				

						// extract tag, if not duplicate, add to parent item						
						if($xo->content) {
							if(! (stristr($r[0]['tag'],trim($xo->content)))) {
								q("UPDATE item SET tag = '%s' WHERE id = %d LIMIT 1",
									dbesc($r[0]['tag'] . (strlen($r[0]['tag']) ? ',' : '') . '#[url=' . $xo->id . ']'. $xo->content . '[/url]'),
									intval($r[0]['id'])
								);
							}
						}													
					}
				}

				$posted_id = item_store($datarray);

				// find out if our user is involved in this conversation and wants to be notified.
			
				if(!x($datarray['type']) || $datarray['type'] != 'activity') {

					$myconv = q("SELECT `author-link`, `author-avatar`, `parent` FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d AND `parent` != 0 AND `deleted` = 0",
						dbesc($parent_uri),
						intval($importer['importer_uid'])
					);

					if(count($myconv)) {
						$importer_url = $a->get_baseurl() . '/profile/' . $importer['nickname'];

						// first make sure this isn't our own post coming back to us from a wall-to-wall event
						if(! link_compare($datarray['author-link'],$importer_url)) {

							
							foreach($myconv as $conv) {

								// now if we find a match, it means we're in this conversation
	
								if(! link_compare($conv['author-link'],$importer_url))
									continue;

								require_once('include/enotify.php');
								
								$conv_parent = $conv['parent'];

								notification(array(
									'type'         => NOTIFY_COMMENT,
									'notify_flags' => $importer['notify-flags'],
									'language'     => $importer['language'],
									'to_name'      => $importer['username'],
									'to_email'     => $importer['email'],
									'uid'          => $importer['importer_uid'],
									'item'         => $datarray,
									'link'		   => $a->get_baseurl() . '/display/' . $importer['nickname'] . '/' . $posted_id,
									'source_name'  => stripslashes($datarray['author-name']),
									'source_link'  => $datarray['author-link'],
									'source_photo' => ((link_compare($datarray['author-link'],$importer['url'])) 
										? $importer['thumb'] : $datarray['author-avatar']),
									'verb'         => ACTIVITY_POST,
									'otype'        => 'item',
									'parent'       => $conv_parent,

								));

								// only send one notification
								break;
							}
						}
					}
				}
				continue;
			}
		}

		else {

			// Head post of a conversation. Have we seen it? If not, import it.


			$item_id  = $item->get_id();
			$datarray = get_atom_elements($feed,$item);

			if((x($datarray,'object-type')) && ($datarray['object-type'] === ACTIVITY_OBJ_EVENT)) {
				$ev = bbtoevent($datarray['body']);
				if(x($ev,'desc') && x($ev,'start')) {
					$ev['cid'] = $importer['id'];
					$ev['uid'] = $importer['uid'];
					$ev['uri'] = $item_id;
					$ev['edited'] = $datarray['edited'];
					$ev['private'] = $datarray['private'];

					$r = q("SELECT * FROM `event` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
						dbesc($item_id),
						intval($importer['uid'])
					);
					if(count($r))
						$ev['id'] = $r[0]['id'];
					$xyz = event_store($ev);
					continue;
				}
			}

			$r = q("SELECT `uid`, `last-child`, `edited`, `body` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
				dbesc($item_id),
				intval($importer['importer_uid'])
			);

			// Update content if 'updated' changes

			if(count($r)) {
				if((x($datarray,'edited') !== false) && (datetime_convert('UTC','UTC',$datarray['edited']) !== $r[0]['edited'])) {  
					$r = q("UPDATE `item` SET `title` = '%s', `body` = '%s', `tag` = '%s', `edited` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
						dbesc($datarray['title']),
						dbesc($datarray['body']),
						dbesc($datarray['tag']),
						dbesc(datetime_convert('UTC','UTC',$datarray['edited'])),
						dbesc($item_id),
						intval($importer['importer_uid'])
					);
				}

				// update last-child if it changes

				$allow = $item->get_item_tags( NAMESPACE_DFRN, 'comment-allow');
				if($allow && $allow[0]['data'] != $r[0]['last-child']) {
					$r = q("UPDATE `item` SET `last-child` = %d , `changed` = '%s' WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
						intval($allow[0]['data']),
						dbesc(datetime_convert()),
						dbesc($item_id),
						intval($importer['importer_uid'])
					);
				}
				continue;
			}

			// This is my contact on another system, but it's really me.
			// Turn this into a wall post.

			if($importer['remote_self'])
				$datarray['wall'] = 1;

			$datarray['parent-uri'] = $item_id;
			$datarray['uid'] = $importer['importer_uid'];
			$datarray['contact-id'] = $importer['id'];

			if(! link_compare($datarray['owner-link'],$contact['url'])) {
				// The item owner info is not our contact. It's OK and is to be expected if this is a tgroup delivery, 
				// but otherwise there's a possible data mixup on the sender's system.
				// the tgroup delivery code called from item_store will correct it if it's a forum,
				// but we're going to unconditionally correct it here so that the post will always be owned by our contact. 
				logger('local_delivery: Correcting item owner.', LOGGER_DEBUG);
				$datarray['owner-name']   = $importer['senderName'];
				$datarray['owner-link']   = $importer['url'];
				$datarray['owner-avatar'] = $importer['thumb'];
			}

			$r = item_store($datarray);
			continue;
		}
	}

	return 0;
	// NOTREACHED

}


function new_follower($importer,$contact,$datarray,$item,$sharing = false) {
	$url = notags(trim($datarray['author-link']));
	$name = notags(trim($datarray['author-name']));
	$photo = notags(trim($datarray['author-avatar']));

	$rawtag = $item->get_item_tags(NAMESPACE_ACTIVITY,'actor');
	if($rawtag && $rawtag[0]['child'][NAMESPACE_POCO]['preferredUsername'][0]['data'])
		$nick = $rawtag[0]['child'][NAMESPACE_POCO]['preferredUsername'][0]['data'];

	if(is_array($contact)) {
		if(($contact['network'] == NETWORK_OSTATUS && $contact['rel'] == CONTACT_IS_SHARING)
			|| ($sharing && $contact['rel'] == CONTACT_IS_FOLLOWER)) {
			$r = q("UPDATE `contact` SET `rel` = %d WHERE `id` = %d AND `uid` = %d LIMIT 1",
				intval(CONTACT_IS_FRIEND),
				intval($contact['id']),
				intval($importer['uid'])
			);
		}
		// send email notification to owner?
	}
	else {
	
		// create contact record

		$r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `nurl`, `name`, `nick`, `photo`, `network`, `rel`, 
			`blocked`, `readonly`, `pending`, `writable` )
			VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, 1 ) ",
			intval($importer['uid']),
			dbesc(datetime_convert()),
			dbesc($url),
			dbesc(normalise_link($url)),
			dbesc($name),
			dbesc($nick),
			dbesc($photo),
			dbesc(($sharing) ? NETWORK_ZOT : NETWORK_OSTATUS),
			intval(($sharing) ? CONTACT_IS_SHARING : CONTACT_IS_FOLLOWER)
		);
		$r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `pending` = 1 LIMIT 1",
				intval($importer['uid']),
				dbesc($url)
		);
		if(count($r))
				$contact_record = $r[0];

		// create notification	
		$hash = random_string();

		if(is_array($contact_record)) {
			$ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `hash`, `datetime`)
				VALUES ( %d, %d, 0, 0, '%s', '%s' )",
				intval($importer['uid']),
				intval($contact_record['id']),
				dbesc($hash),
				dbesc(datetime_convert())
			);
		}
		$r = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
			intval($importer['uid'])
		);
		$a = get_app();
		if(count($r)) {

			if(intval($r[0]['def_gid'])) {
				require_once('include/group.php');
				group_add_member($r[0]['uid'],'',$contact_record['id'],$r[0]['def_gid']);
			}

			if(($r[0]['notify-flags'] & NOTIFY_INTRO) && ($r[0]['page-flags'] == PAGE_NORMAL)) {
				$email_tpl = get_intltext_template('follow_notify_eml.tpl');
				$email = replace_macros($email_tpl, array(
					'$requestor' => ((strlen($name)) ? $name : t('[Name Withheld]')),
					'$url' => $url,
					'$myname' => $r[0]['username'],
					'$siteurl' => $a->get_baseurl(),
					'$sitename' => $a->config['sitename']
				));
				$res = mail($r[0]['email'], 
					(($sharing) ? t('A new person is sharing with you at ') : t("You have a new follower at ")) . $a->config['sitename'],
					$email,
					'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
					. 'Content-type: text/plain; charset=UTF-8' . "\n"
					. 'Content-transfer-encoding: 8bit' );
			
			}
		}
	}
}

function lose_follower($importer,$contact,$datarray,$item) {

	if(($contact['rel'] == CONTACT_IS_FRIEND) || ($contact['rel'] == CONTACT_IS_SHARING)) {
		q("UPDATE `contact` SET `rel` = %d WHERE `id` = %d LIMIT 1",
			intval(CONTACT_IS_SHARING),
			intval($contact['id'])
		);
	}
	else {
		contact_remove($contact['id']);
	}
}

function lose_sharer($importer,$contact,$datarray,$item) {

	if(($contact['rel'] == CONTACT_IS_FRIEND) || ($contact['rel'] == CONTACT_IS_FOLLOWER)) {
		q("UPDATE `contact` SET `rel` = %d WHERE `id` = %d LIMIT 1",
			intval(CONTACT_IS_FOLLOWER),
			intval($contact['id'])
		);
	}
	else {
		contact_remove($contact['id']);
	}
}


function subscribe_to_hub($url,$importer,$contact,$hubmode = 'subscribe') {

	if(is_array($importer)) {
		$r = q("SELECT `nickname` FROM `user` WHERE `uid` = %d LIMIT 1",
			intval($importer['uid'])
		);
	}

	// Diaspora has different message-ids in feeds than they do 
	// through the direct Diaspora protocol. If we try and use
	// the feed, we'll get duplicates. So don't.

	if((! count($r)) || $contact['network'] === NETWORK_DIASPORA)
		return;

	$push_url = get_config('system','url') . '/pubsub/' . $r[0]['nickname'] . '/' . $contact['id'];

	// Use a single verify token, even if multiple hubs

	$verify_token = ((strlen($contact['hub-verify'])) ? $contact['hub-verify'] : random_string());

	$params= 'hub.mode=' . $hubmode . '&hub.callback=' . urlencode($push_url) . '&hub.topic=' . urlencode($contact['poll']) . '&hub.verify=async&hub.verify_token=' . $verify_token;

	logger('subscribe_to_hub: ' . $hubmode . ' ' . $contact['name'] . ' to hub ' . $url . ' endpoint: '  . $push_url . ' with verifier ' . $verify_token);

	if(! strlen($contact['hub-verify'])) {
		$r = q("UPDATE `contact` SET `hub-verify` = '%s' WHERE `id` = %d LIMIT 1",
			dbesc($verify_token),
			intval($contact['id'])
		);
	}

	post_url($url,$params);			
	return;

}


function atom_author($tag,$name,$uri,$h,$w,$photo) {
	$o = '';
	if(! $tag)
		return $o;
	$name = xmlify($name);
	$uri = xmlify($uri);
	$h = intval($h);
	$w = intval($w);
	$photo = xmlify($photo);


	$o .= "<$tag>\r\n";
	$o .= "<name>$name</name>\r\n";
	$o .= "<uri>$uri</uri>\r\n";
	$o .= '<link rel="photo"  type="image/jpeg" media:width="' . $w . '" media:height="' . $h . '" href="' . $photo . '" />' . "\r\n";
	$o .= '<link rel="avatar" type="image/jpeg" media:width="' . $w . '" media:height="' . $h . '" href="' . $photo . '" />' . "\r\n";

	call_hooks('atom_author', $o);

	$o .= "</$tag>\r\n";
	return $o;
}

function atom_entry($item,$type,$author,$owner,$comment = false,$cid = 0) {

	$a = get_app();

	if(! $item['parent'])
		return;

	if($item['deleted'])
		return '<at:deleted-entry ref="' . xmlify($item['uri']) . '" when="' . xmlify(datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME)) . '" />' . "\r\n";


	if($item['allow_cid'] || $item['allow_gid'] || $item['deny_cid'] || $item['deny_gid'])
		$body = fix_private_photos($item['body'],$owner['uid'],$item,$cid);
	else
		$body = $item['body'];


	$o = "\r\n\r\n<entry>\r\n";

	if(is_array($author))
		$o .= atom_author('author',$author['name'],$author['url'],80,80,$author['thumb']);
	else
		$o .= atom_author('author',(($item['author-name']) ? $item['author-name'] : $item['name']),(($item['author-link']) ? $item['author-link'] : $item['url']),80,80,(($item['author-avatar']) ? $item['author-avatar'] : $item['thumb']));
	if(strlen($item['owner-name']))
		$o .= atom_author('dfrn:owner',$item['owner-name'],$item['owner-link'],80,80,$item['owner-avatar']);

	if(($item['parent'] != $item['id']) || ($item['parent-uri'] !== $item['uri']))
		$o .= '<thr:in-reply-to ref="' . xmlify($item['parent-uri']) . '" type="text/html" href="' .  xmlify($a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['parent']) . '" />' . "\r\n";

	$o .= '<id>' . xmlify($item['uri']) . '</id>' . "\r\n";
	$o .= '<title>' . xmlify($item['title']) . '</title>' . "\r\n";
	$o .= '<published>' . xmlify(datetime_convert('UTC','UTC',$item['created'] . '+00:00',ATOM_TIME)) . '</published>' . "\r\n";
	$o .= '<updated>' . xmlify(datetime_convert('UTC','UTC',$item['edited'] . '+00:00',ATOM_TIME)) . '</updated>' . "\r\n";
	$o .= '<dfrn:env>' . base64url_encode($body, true) . '</dfrn:env>' . "\r\n";
	$o .= '<content type="' . $type . '" >' . xmlify((($type === 'html') ? bbcode($body) : $body)) . '</content>' . "\r\n";
	$o .= '<link rel="alternate" type="text/html" href="' . xmlify($a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id']) . '" />' . "\r\n";
	if($comment)
		$o .= '<dfrn:comment-allow>' . intval($item['last-child']) . '</dfrn:comment-allow>' . "\r\n";

	if($item['location']) {
		$o .= '<dfrn:location>' . xmlify($item['location']) . '</dfrn:location>' . "\r\n";
		$o .= '<poco:address><poco:formatted>' . xmlify($item['location']) . '</poco:formatted></poco:address>' . "\r\n";
	}

	if($item['coord'])
		$o .= '<georss:point>' . xmlify($item['coord']) . '</georss:point>' . "\r\n";

	if(($item['private']) || strlen($item['allow_cid']) || strlen($item['allow_gid']) || strlen($item['deny_cid']) || strlen($item['deny_gid']))
		$o .= '<dfrn:private>1</dfrn:private>' . "\r\n";

	if($item['extid'])
		$o .= '<dfrn:extid>' . xmlify($item['extid']) . '</dfrn:extid>' . "\r\n";
	if($item['bookmark'])
		$o .= '<dfrn:bookmark>true</dfrn:bookmark>' . "\r\n";

	if($item['app'])
		$o .= '<statusnet:notice_info local_id="' . $item['id'] . '" source="' . xmlify($item['app']) . '" ></statusnet:notice_info>' . "\r\n";

	if($item['guid'])
		$o .= '<dfrn:diaspora_guid>' . $item['guid'] . '</dfrn:diaspora_guid>' . "\r\n";

	if($item['signed_text']) {
		$sign = base64_encode(json_encode(array('signed_text' => $item['signed_text'],'signature' => $item['signature'],'signer' => $item['signer'])));
		$o .= '<dfrn:diaspora_signature>' . xmlify($sign) . '</dfrn:diaspora_signature>' . "\r\n";
	}

	$verb = construct_verb($item);
	$o .= '<as:verb>' . xmlify($verb) . '</as:verb>' . "\r\n";
	$actobj = construct_activity_object($item);
	if(strlen($actobj))
		$o .= $actobj;
	$actarg = construct_activity_target($item);
	if(strlen($actarg))
		$o .= $actarg;

	$tags = item_getfeedtags($item);
	if(count($tags)) {
		foreach($tags as $t) {
			$o .= '<category scheme="X-DFRN:' . xmlify($t[0]) . ':' . xmlify($t[1]) . '" term="' . xmlify($t[2]) . '" />' . "\r\n";
		}
	}

	$o .= item_getfeedattach($item);

	$mentioned = get_mentions($item);
	if($mentioned)
		$o .= $mentioned;
	
	call_hooks('atom_entry', $o);

	$o .= '</entry>' . "\r\n";
	
	return $o;
}

function fix_private_photos($s,$uid, $item = null, $cid = 0) {
	$a = get_app();

	logger('fix_private_photos', LOGGER_DEBUG);
	$site = substr($a->get_baseurl(),strpos($a->get_baseurl(),'://'));

	if(preg_match("/\[img(.*?)\](.*?)\[\/img\]/is",$s,$matches)) {
		$image = $matches[2];
		logger('fix_private_photos: found photo ' . $image, LOGGER_DEBUG);
		if(stristr($image , $site . '/photo/')) {
			$replace = false;
			$i = basename($image);
			$i = str_replace('.jpg','',$i);
			$x = strpos($i,'-');
			if($x) {
				$res = substr($i,$x+1);
				$i = substr($i,0,$x);
				$r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' AND `scale` = %d AND `uid` = %d",
					dbesc($i),
					intval($res),
					intval($uid)
				);
				if(count($r)) {

					// Check to see if we should replace this photo link with an embedded image
					// 1. No need to do so if the photo is public
					// 2. If there's a contact-id provided, see if they're in the access list
					//    for the photo. If so, embed it. 
					// 3. Otherwise, if we have an item, see if the item permissions match the photo
					//    permissions, regardless of order but first check to see if they're an exact
					//    match to save some processing overhead.
				
					// Currently we only embed one private photo per message so as not to hit import 
					// size limits at the receiving end.

					// To embed multiples, we would need to parse out the embedded photos on message
					// receipt and limit size based only on the text component. Would also need to
					// ignore all photos during bbcode translation and item localisation, as these
					// will hit internal regex backtrace limits.  

					if(has_permissions($r[0])) {
						if($cid) {
							$recips = enumerate_permissions($r[0]);
							if(in_array($cid, $recips)) {
								$replace = true;	
							}
						}
						elseif($item) {
							if(compare_permissions($item,$r[0]))
								$replace = true;
						}
					}
					if($replace) {
						logger('fix_private_photos: replacing photo', LOGGER_DEBUG);
						$s = str_replace($image, 'data:image/jpg;base64,' . base64_encode($r[0]['data']), $s);
						logger('fix_private_photos: replaced: ' . $s, LOGGER_DATA);
					}
				}
			}
		}	
	}
	return($s);
}


function has_permissions($obj) {
	if(($obj['allow_cid'] != '') || ($obj['allow_gid'] != '') || ($obj['deny_cid'] != '') || ($obj['deny_gid'] != ''))
		return true;
	return false;
}

function compare_permissions($obj1,$obj2) {
	// first part is easy. Check that these are exactly the same. 
	if(($obj1['allow_cid'] == $obj2['allow_cid'])
		&& ($obj1['allow_gid'] == $obj2['allow_gid'])
		&& ($obj1['deny_cid'] == $obj2['deny_cid'])
		&& ($obj1['deny_gid'] == $obj2['deny_gid']))
		return true;

	// This is harder. Parse all the permissions and compare the resulting set.

	$recipients1 = enumerate_permissions($obj1);
	$recipients2 = enumerate_permissions($obj2);
	sort($recipients1);
	sort($recipients2);
	if($recipients1 == $recipients2)
		return true;
	return false;
}

// returns an array of contact-ids that are allowed to see this object

function enumerate_permissions($obj) {
	require_once('include/group.php');
	$allow_people = expand_acl($obj['allow_cid']);
	$allow_groups = expand_groups(expand_acl($obj['allow_gid']));
	$deny_people  = expand_acl($obj['deny_cid']);
	$deny_groups  = expand_groups(expand_acl($obj['deny_gid']));
	$recipients   = array_unique(array_merge($allow_people,$allow_groups));
	$deny         = array_unique(array_merge($deny_people,$deny_groups));
	$recipients   = array_diff($recipients,$deny);
	return $recipients;
}

function item_getfeedtags($item) {
	$ret = array();
	$matches = false;
	$cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|',$item['tag'],$matches);
	if($cnt) {
		for($x = 0; $x < $cnt; $x ++) {
			if($matches[1][$x])
				$ret[] = array('#',$matches[1][$x], $matches[2][$x]);
		}
	}
	$matches = false; 
	$cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|',$item['tag'],$matches);
	if($cnt) {
		for($x = 0; $x < $cnt; $x ++) {
			if($matches[1][$x])
				$ret[] = array('@',$matches[1][$x], $matches[2][$x]);
		}
	} 
	return $ret;
}

function item_getfeedattach($item) {
	$ret = '';
	$arr = explode(',',$item['attach']);
	if(count($arr)) {
		foreach($arr as $r) {
			$matches = false;
			$cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"\[\/attach\]|',$r,$matches);
			if($cnt) {
				$ret .= '<link rel="enclosure" href="' . xmlify($matches[1]) . '" type="' . xmlify($matches[3]) . '" ';
				if(intval($matches[2]))
					$ret .= 'length="' . intval($matches[2]) . '" ';
				if($matches[4] !== ' ')
					$ret .= 'title="' . xmlify(trim($matches[4])) . '" ';
				$ret .= ' />' . "\r\n";
			}
		}
	}
	return $ret;
}


	
function item_expire($uid,$days) {

	if((! $uid) || ($days < 1))
		return;

	// $expire_network_only = save your own wall posts
	// and just expire conversations started by others

	$expire_network_only = get_pconfig($uid,'expire','network_only');
	$sql_extra = ((intval($expire_network_only)) ? " AND wall = 0 " : "");

	$r = q("SELECT * FROM `item` 
		WHERE `uid` = %d 
		AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY 
		AND `id` = `parent` 
		$sql_extra
		AND `deleted` = 0",
		intval($uid),
		intval($days)
	);

	if(! count($r))
		return;

	$expire_items = get_pconfig($uid, 'expire','items');
	$expire_items = (($expire_items===false)?1:intval($expire_items)); // default if not set: 1
	
	$expire_notes = get_pconfig($uid, 'expire','notes');
	$expire_notes = (($expire_notes===false)?1:intval($expire_notes)); // default if not set: 1

	$expire_starred = get_pconfig($uid, 'expire','starred');
	$expire_starred = (($expire_starred===false)?1:intval($expire_starred)); // default if not set: 1
	
	$expire_photos = get_pconfig($uid, 'expire','photos');
	$expire_photos = (($expire_photos===false)?0:intval($expire_photos)); // default if not set: 0
 
	logger('expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");

	foreach($r as $item) {

		// don't expire filed items

		if(strpos($item['file'],'[') !== false)
			continue;

		// Only expire posts, not photos and photo comments

		if($expire_photos==0 && strlen($item['resource-id']))
			continue;
		if($expire_starred==0 && intval($item['starred']))
			continue;
		if($expire_notes==0 && $item['type']=='note')
			continue;
		if($expire_items==0 && $item['type']!='note')
			continue;

		drop_item($item['id'],false);
	}

	proc_run('php',"include/notifier.php","expire","$uid");
	
}


function drop_items($items) {
	$uid = 0;

	if(! local_user() && ! remote_user())
		return;

	if(count($items)) {
		foreach($items as $item) {
			$owner = drop_item($item,false);
			if($owner && ! $uid)
				$uid = $owner;
		}
	}

	// multiple threads may have been deleted, send an expire notification

	if($uid)
		proc_run('php',"include/notifier.php","expire","$uid");
}


function drop_item($id,$interactive = true) {

	$a = get_app();

	// locate item to be deleted

	$r = q("SELECT * FROM `item` WHERE `id` = %d LIMIT 1",
		intval($id)
	);

	if(! count($r)) {
		if(! $interactive)
			return 0;
		notice( t('Item not found.') . EOL);
		goaway($a->get_baseurl() . '/' . $_SESSION['return_url']);
	}

	$item = $r[0];

	$owner = $item['uid'];

	// check if logged in user is either the author or owner of this item

	if((local_user() == $item['uid']) || (remote_user() == $item['contact-id'])) {

		// delete the item

		$r = q("UPDATE `item` SET `deleted` = 1, `title` = '', `body` = '', `edited` = '%s', `changed` = '%s' WHERE `id` = %d LIMIT 1",
			dbesc(datetime_convert()),
			dbesc(datetime_convert()),
			intval($item['id'])
		);

		// clean up categories and tags so they don't end up as orphans

		$matches = false;
		$cnt = preg_match_all('/<(.*?)>/',$item['file'],$matches,PREG_SET_ORDER);
		if($cnt) {
			foreach($matches as $mtch) {
				file_tag_unsave_file($item['uid'],$item['id'],$mtch[1],true);
			}
		}

		$matches = false;

		$cnt = preg_match_all('/\[(.*?)\]/',$item['file'],$matches,PREG_SET_ORDER);
		if($cnt) {
			foreach($matches as $mtch) {
				file_tag_unsave_file($item['uid'],$item['id'],$mtch[1],false);
			}
		}

		// If item is a link to a photo resource, nuke all the associated photos 
		// (visitors will not have photo resources)
		// This only applies to photos uploaded from the photos page. Photos inserted into a post do not
		// generate a resource-id and therefore aren't intimately linked to the item. 

		if(strlen($item['resource-id'])) {
			q("DELETE FROM `photo` WHERE `resource-id` = '%s' AND `uid` = %d ",
				dbesc($item['resource-id']),
				intval($item['uid'])
			);
			// ignore the result
		}

		// If item is a link to an event, nuke the event record.

		if(intval($item['event-id'])) {
			q("DELETE FROM `event` WHERE `id` = %d AND `uid` = %d LIMIT 1",
				intval($item['event-id']),
				intval($item['uid'])
			);
			// ignore the result
		}

		// clean up item_id and sign meta-data tables

		$r = q("DELETE FROM item_id where iid in (select id from item where parent = %d and uid = %d)",
			intval($item['id']),
			intval($item['uid'])
		);

		$r = q("DELETE FROM sign where iid in (select id from item where parent = %d and uid = %d)",
			intval($item['id']),
			intval($item['uid'])
		);

		// If it's the parent of a comment thread, kill all the kids

		if($item['uri'] == $item['parent-uri']) {
			$r = q("UPDATE `item` SET `deleted` = 1, `edited` = '%s', `changed` = '%s', `body` = '' , `title` = ''
				WHERE `parent-uri` = '%s' AND `uid` = %d ",
				dbesc(datetime_convert()),
				dbesc(datetime_convert()),
				dbesc($item['parent-uri']),
				intval($item['uid'])
			);
			// ignore the result
		}
		else {
			// ensure that last-child is set in case the comment that had it just got wiped.
			q("UPDATE `item` SET `last-child` = 0, `changed` = '%s' WHERE `parent-uri` = '%s' AND `uid` = %d ",
				dbesc(datetime_convert()),
				dbesc($item['parent-uri']),
				intval($item['uid'])
			);
			// who is the last child now? 
			$r = q("SELECT `id` FROM `item` WHERE `parent-uri` = '%s' AND `type` != 'activity' AND `deleted` = 0 AND `uid` = %d ORDER BY `edited` DESC LIMIT 1",
				dbesc($item['parent-uri']),
				intval($item['uid'])
			);
			if(count($r)) {
				q("UPDATE `item` SET `last-child` = 1 WHERE `id` = %d LIMIT 1",
					intval($r[0]['id'])
				);
			}

			// Add a relayable_retraction signature for Diaspora. Note that we can't add a target_author_signature
			// if the comment/like was deleted by a remote user. That should be ok, because if a remote user is deleting
			// the comment/like, that means we're the home of the post, and Diaspora will only
			// check the parent_author_signature of retractions that it doesn't have to relay further
			$signed_text = $item['guid'] . ';' . ( ($item['verb'] === ACTIVITY_LIKE) ? 'Like' : 'Comment');

			if(local_user() == $item['uid']) {

				$handle = $a->user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3);
				$authorsig = base64_encode(rsa_sign($signed_text,$a->user['prvkey'],'sha256'));
			}
			else {
				$r = q("SELECT `nick`, `url` FROM `contact` WHERE `id` = '%d' LIMIT 1",
					$item['contact-id']
				);
				if(count($r)) {
					$handle = $r['nick'] . '@' . substr($r['url'], strpos($r['url'],'://') + 3, strpos($r['url'],'/profile') - 1);
					$authorsig = '';
				}
			}

			if(isset($handle))
				q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
					intval($item['id']),
					dbesc($signed_text),
					dbesc($authorsig),
					dbesc($handle)
				);
		}
		$drop_id = intval($item['id']);

		// send the notification upstream/downstream as the case may be

		if(! $interactive)
			return $owner;

		proc_run('php',"include/notifier.php","drop","$drop_id");
		goaway($a->get_baseurl() . '/' . $_SESSION['return_url']);
		//NOTREACHED
	}
	else {
		if(! $interactive)
			return 0;
		notice( t('Permission denied.') . EOL);
		goaway($a->get_baseurl() . '/' . $_SESSION['return_url']);
		//NOTREACHED
	}
	
}