<?php

$debugging = false;

require_once("boot.php");

$a = new App;

@include(".htconfig.php");
require_once("dba.php");
$db = new dba($db_host, $db_user, $db_pass, $db_data, $install);
	unset($db_host, $db_user, $db_pass, $db_data);

require_once("session.php");
require_once("datetime.php");

if($argc < 2)
	exit;

	$a->set_baseurl(get_config('system',url'));

	$baseurl = $argv[1];
	$a->set_baseurl($argv[1]);

	$cmd = $argv[1];

	switch($cmd) {

		case 'mail':
		default:
			$item_id = intval($argv[2]);
			if(! $item_id)
				killme();
			break;
	}


	$recipients = array();

	if($cmd == 'mail') {

		$message = q("SELECT * FROM `mail` WHERE `id` = %d LIMIT 1",
				intval($item_id)
		);
		if(! count($message))
			killme();
		$uid = $message[0]['uid'];
		$recipients[] = $message[0]['contact-id'];
		$item = $message[0];

	}
	else {
		// find ancestors

		$r = q("SELECT `parent`, `uid`, `edited` FROM `item` WHERE `id` = %d LIMIT 1",
			intval($item_id)
		);
		if(! count($r))
			killme();

		$parent = $r[0]['parent'];
		$uid = $r[0]['uid'];
		$updated = $r[0]['edited'];

		$items = q("SELECT * FROM `item` WHERE `parent` = %d ORDER BY `id` ASC",
			intval($parent)
		);

		if(! count($items))
			killme();
	}

	$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
		intval($uid)
	);

	if(count($r))
		$owner = $r[0];
	else
		killme();

	if($cmd != 'mail') {

		require_once('include/group.php');

		$parent = $items[0];

		if($parent['type'] == 'remote') {
			// local followup to remote post
			$followup = true;
			$conversant_str = dbesc($parent['contact-id']);
		}
		else {
			$followup = false;

			$allow_people = expand_acl($parent['allow_cid']);
			$allow_groups = expand_groups(expand_acl($parent['allow_gid']));
			$deny_people = expand_acl($parent['deny_cid']);
			$deny_groups = expand_groups(expand_acl($parent['deny_gid']));

			$conversants = array();

			foreach($items as $item) {
				$recipients[] = $item['contact-id'];
				$conversants[] = $item['contact-id'];
			}

			$conversants = array_unique($conversants,SORT_NUMERIC);


			$recipients = array_unique(array_merge($recipients,$allow_people,$allow_groups),SORT_NUMERIC);
			$deny = array_unique(array_merge($deny_people,$deny_groups),SORT_NUMERIC);
			$recipients = array_diff($recipients,$deny);
	
			$conversant_str = dbesc(implode(', ',$conversants));
		}

		$r = q("SELECT * FROM `contact` WHERE `id` IN ( $conversant_str ) AND `blocked` = 0 AND `pending` = 0");

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

		$contacts = $r;

		$tomb_template = file_get_contents('view/atom_tomb.tpl');
		$item_template = file_get_contents('view/atom_item.tpl');
		$cmnt_template = file_get_contents('view/atom_cmnt.tpl');
	}

	$feed_template = file_get_contents('view/atom_feed.tpl');
	$mail_template = file_get_contents('view/atom_mail.tpl');

	$atom = '';


	$atom .= replace_macros($feed_template, array(
			'$feed_id' => xmlify($a->get_baseurl()),
			'$feed_title' => xmlify($owner['name']),
			'$feed_updated' => xmlify(datetime_convert('UTC', 'UTC', 
				$updated . '+00:00' , 'Y-m-d\TH:i:s\Z')) ,
			'$name' => xmlify($owner['name']),
			'$profile_page' => xmlify($owner['url']),
			'$photo' => xmlify($owner['photo']),
			'$thumb' => xmlify($owner['thumb']),
			'$picdate' => xmlify(datetime_convert('UTC','UTC',$owner['avatar-date'] . '+00:00' , 'Y-m-d\TH:i:s\Z')) ,
			'$uridate' => xmlify(datetime_convert('UTC','UTC',$owner['uri-date'] . '+00:00' , 'Y-m-d\TH:i:s\Z')) ,
			'$namdate' => xmlify(datetime_convert('UTC','UTC',$owner['name-date'] . '+00:00' , 'Y-m-d\TH:i:s\Z'))
	));

	if($cmd == 'mail') {
		$atom .= replace_macros($mail_template, array(
			'$name' => xmlify($owner['name']),
			'$profile_page' => xmlify($owner['url']),
			'$thumb' => xmlify($owner['thumb']),
			'$item_id' => xmlify($item['uri']),
			'$subject' => xmlify($item['title']),
			'$created' => xmlify(datetime_convert('UTC', 'UTC', 
				$item['created'] . '+00:00' , 'Y-m-d\TH:i:s\Z')),
			'$content' =>xmlify($item['body']),
			'$parent_id' => xmlify($item['parent-uri'])

		));
	}
	else {

		if($followup) {
			foreach($items as $item) {
				if($item['id'] == $item_id) {
					$atom .= replace_macros($cmnt_template, array(
						'$name' => xmlify($owner['name']),
						'$profile_page' => xmlify($owner['url']),
						'$thumb' => xmlify($owner['thumb']),
						'$item_id' => xmlify($item['uri']),
						'$title' => xmlify($item['title']),
						'$published' => xmlify(datetime_convert('UTC', 'UTC', 
							$item['created'] . '+00:00' , 'Y-m-d\TH:i:s\Z')),
						'$updated' => xmlify(datetime_convert('UTC', 'UTC', 
							$item['edited'] . '+00:00' , 'Y-m-d\TH:i:s\Z')),
						'$content' =>xmlify($item['body']),
						'$parent_id' => xmlify($item['parent-uri']),
						'$comment_allow' => 0
					));
				}
			}
		}
		else {
			foreach($items as $item) {
				if($item['deleted']) {
					$atom .= replace_macros($tomb_template, array(
						'$id' => xmlify($item['uri']),
						'$updated' => xmlify(datetime_convert('UTC', 'UTC', 
							$item['edited'] . '+00:00' , 'Y-m-d\TH:i:s\Z'))
					));
				}
				else {
					foreach($contacts as $contact) {
						if($item['contact-id'] == $contact['id']) {
							if($item['parent'] == $item['id']) {
								$atom .= replace_macros($item_template, array(
									'$name' => xmlify($contact['name']),
									'$profile_page' => xmlify($contact['url']),
									'$thumb' => xmlify($contact['thumb']),
									'$owner_name' => xmlify($item['owner-name']),
									'$owner_profile_page' => xmlify($item['owner-link']),
									'$owner_thumb' => xmlify($item['owner-avatar']),
									'$item_id' => xmlify($item['uri']),
									'$title' => xmlify($item['title']),
									'$published' => xmlify(datetime_convert('UTC', 'UTC', 
										$item['created'] . '+00:00' , 'Y-m-d\TH:i:s\Z')),
									'$updated' => xmlify(datetime_convert('UTC', 'UTC', 
										$item['edited'] . '+00:00' , 'Y-m-d\TH:i:s\Z')),
									'$content' =>xmlify($item['body']),
									'$comment_allow' => (($item['last-child'] && strlen($contact['dfrn-id'])) ? 1 : 0)
								));
							}
							else {
								$atom .= replace_macros($cmnt_template, array(
									'$name' => xmlify($contact['name']),
									'$profile_page' => xmlify($contact['url']),
									'$thumb' => xmlify($contact['thumb']),
									'$item_id' => xmlify($item['uri']),
									'$title' => xmlify($item['title']),
									'$published' => xmlify(datetime_convert('UTC', 'UTC', 
										$item['created'] . '+00:00' , 'Y-m-d\TH:i:s\Z')),
									'$updated' => xmlify(datetime_convert('UTC', 'UTC', 
										$item['edited'] . '+00:00' , 'Y-m-d\TH:i:s\Z')),
									'$content' =>xmlify($item['body']),
									'$parent_id' => xmlify($item['parent-uri']),
									'$comment_allow' => (($item['last-child']) ? 1 : 0)
								));
							}
						}
					}
				}
			}
		}
	}
	$atom .= "</feed>\r\n";

	if($debugging)
		echo $atom;

	// create a clone of this feed but with comments disabled to send to those who can't respond. 

	$atom_nowrite = str_replace('<dfrn:comment-allow>1','<dfrn:comment-allow>0',$atom);


	if($followup)
		$recip_str = $parent['contact-id'];
	else
		$recip_str = implode(', ', $recipients);


	$r = q("SELECT * FROM `contact` WHERE `id` IN ( %s ) ",
		dbesc($recip_str)
	);
	if(! count($r))
		killme();

	// delivery loop

	foreach($r as $rr) {
		if($rr['self'])
			continue;

		if(! strlen($rr['dfrn-id']))
			continue;


		$url = $rr['notify'] . '?dfrn_id=' . $rr['dfrn-id'];

		$xml = fetch_url($url);

		if($debugging)
			echo $xml;

		if(! $xml)
			continue;

		$res = simplexml_load_string($xml);

		if((intval($res->status) != 0) || (! strlen($res->challenge)) || (! strlen($res->dfrn_id)))
			continue;

		$postvars = array();
		$sent_dfrn_id = hex2bin($res->dfrn_id);

		$final_dfrn_id = '';
		openssl_public_decrypt($sent_dfrn_id,$final_dfrn_id,$rr['pubkey']);
		$final_dfrn_id = substr($final_dfrn_id, 0, strpos($final_dfrn_id, '.'));
		if($final_dfrn_id != $rr['dfrn-id']) {
			// did not decode properly - cannot trust this site 
			continue;
		}

		$postvars['dfrn_id'] = $rr['dfrn-id'];

		$challenge = hex2bin($res->challenge);

		openssl_public_decrypt($challenge,$postvars['challenge'],$rr['pubkey']);

		if($cmd == 'mail') {
			$postvars['data'] = $atom;
		}
		elseif(strlen($rr['dfrn-id']) && (! ($rr['blocked']) || ($rr['readonly']))) {
			$postvars['data'] = $atom;
		}
		else {
			$postvars['data'] = $atom_nowrite;
		}

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

		if($debugging)
			echo $xml;

		$res = simplexml_load_string($xml);

		// Currently there is no retry attempt for failed mail delivery.
		// We need to handle this in the UI, report the non-deliverables and try again
 
		if(($cmd == 'mail') && (intval($res->status) == 0)) {

			$r = q("UPDATE `mail` SET `delivered` = 1 WHERE `id` = %d LIMIT 1",
				intval($item_id)
			);
		}
	}

	killme();