372 lines
10 KiB
PHP
Executable file
372 lines
10 KiB
PHP
Executable file
<?php
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require_once('include/security.php');
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require_once('include/bbcode.php');
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require_once('include/items.php');
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function like_content(&$a) {
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if(! local_user() && ! remote_user()) {
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return;
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}
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$verb = notags(trim($_GET['verb']));
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if(! $verb)
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$verb = 'like';
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switch($verb) {
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case 'like':
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case 'unlike':
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$activity = ACTIVITY_LIKE;
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break;
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case 'dislike':
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case 'undislike':
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$activity = ACTIVITY_DISLIKE;
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break;
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default:
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return;
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break;
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}
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$item_id = (($a->argc > 1) ? notags(trim($a->argv[1])) : 0);
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logger('like: verb ' . $verb . ' item ' . $item_id);
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$r = q("SELECT * FROM `item` WHERE `id` = '%s' OR `uri` = '%s' LIMIT 1",
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dbesc($item_id),
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dbesc($item_id)
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);
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if(! $item_id || (! count($r))) {
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logger('like: no item ' . $item_id);
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return;
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}
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$item = $r[0];
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$owner_uid = $item['uid'];
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if(! can_write_wall($a,$owner_uid)) {
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return;
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}
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$remote_owner = null;
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if(! $item['wall']) {
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// The top level post may have been written by somebody on another system
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$r = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
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intval($item['contact-id']),
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intval($item['uid'])
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);
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if(! count($r))
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return;
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if(! $r[0]['self'])
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$remote_owner = $r[0];
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}
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// this represents the post owner on this system.
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$r = q("SELECT `contact`.*, `user`.`nickname` FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
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WHERE `contact`.`self` = 1 AND `contact`.`uid` = %d LIMIT 1",
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intval($owner_uid)
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);
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if(count($r))
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$owner = $r[0];
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if(! $owner) {
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logger('like: no owner');
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return;
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}
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if(! $remote_owner)
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$remote_owner = $owner;
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// This represents the person posting
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if((local_user()) && (local_user() == $owner_uid)) {
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$contact = $owner;
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}
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else {
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$r = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
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intval($_SESSION['visitor_id']),
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intval($owner_uid)
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);
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if(count($r))
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$contact = $r[0];
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}
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if(! $contact) {
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return;
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}
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// See if we've been passed a return path to redirect to
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$return_path = ((x($_REQUEST,'return')) ? $_REQUEST['return'] : '');
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$r = q("SELECT * FROM `item` WHERE `verb` = '%s' AND `deleted` = 0
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AND `contact-id` = %d AND ( `parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s') LIMIT 1",
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dbesc($activity),
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intval($contact['id']),
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dbesc($item_id),
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dbesc($item_id),
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dbesc($item['uri'])
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);
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if(count($r)) {
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$like_item = $r[0];
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// Already voted, undo it
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$r = q("UPDATE `item` SET `deleted` = 1, `unseen` = 1, `changed` = '%s' WHERE `id` = %d LIMIT 1",
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dbesc(datetime_convert()),
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intval($like_item['id'])
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);
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// Clean up the Diaspora signatures for this like
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// Go ahead and do it even if Diaspora support is disabled. We still want to clean up
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// if it had been enabled in the past
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$r = q("DELETE FROM `sign` WHERE `iid` = %d",
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intval($like_item['id'])
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);
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// Save the author information for the unlike in case we need to relay to Diaspora
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store_diaspora_like_retract_sig($activity, $item, $like_item, $contact);
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// proc_run('php',"include/notifier.php","like","$post_id"); // $post_id isn't defined here!
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$like_item_id = $like_item['id'];
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proc_run('php',"include/notifier.php","like","$like_item_id");
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like_content_return($a->get_baseurl(), $return_path);
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return; // NOTREACHED
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}
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$uri = item_new_uri($a->get_hostname(),$owner_uid);
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$post_type = (($item['resource-id']) ? t('photo') : t('status'));
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$objtype = (($item['resource-id']) ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE );
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$link = xmlify('<link rel="alternate" type="text/html" href="' . $a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id'] . '" />' . "\n") ;
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$body = $item['body'];
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$obj = <<< EOT
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<object>
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<type>$objtype</type>
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<local>1</local>
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<id>{$item['uri']}</id>
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<link>$link</link>
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<title></title>
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<content>$body</content>
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</object>
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EOT;
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if($verb === 'like')
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$bodyverb = t('%1$s likes %2$s\'s %3$s');
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if($verb === 'dislike')
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$bodyverb = t('%1$s doesn\'t like %2$s\'s %3$s');
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if(! isset($bodyverb))
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return;
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$arr = array();
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$arr['uri'] = $uri;
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$arr['uid'] = $owner_uid;
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$arr['contact-id'] = $contact['id'];
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$arr['type'] = 'activity';
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$arr['wall'] = $item['wall'];
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$arr['origin'] = 1;
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$arr['gravity'] = GRAVITY_LIKE;
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$arr['parent'] = $item['id'];
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$arr['parent-uri'] = $item['uri'];
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$arr['thr-parent'] = $item['uri'];
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$arr['owner-name'] = $remote_owner['name'];
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$arr['owner-link'] = $remote_owner['url'];
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$arr['owner-avatar'] = $remote_owner['thumb'];
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$arr['author-name'] = $contact['name'];
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$arr['author-link'] = $contact['url'];
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$arr['author-avatar'] = $contact['thumb'];
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$ulink = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
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$alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
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$plink = '[url=' . $a->get_baseurl() . '/display/' . $owner['nickname'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
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$arr['body'] = sprintf( $bodyverb, $ulink, $alink, $plink );
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$arr['verb'] = $activity;
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$arr['object-type'] = $objtype;
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$arr['object'] = $obj;
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$arr['allow_cid'] = $item['allow_cid'];
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$arr['allow_gid'] = $item['allow_gid'];
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$arr['deny_cid'] = $item['deny_cid'];
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$arr['deny_gid'] = $item['deny_gid'];
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$arr['visible'] = 1;
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$arr['unseen'] = 1;
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$arr['last-child'] = 0;
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$post_id = item_store($arr);
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if(! $item['visible']) {
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$r = q("UPDATE `item` SET `visible` = 1 WHERE `id` = %d AND `uid` = %d LIMIT 1",
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intval($item['id']),
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intval($owner_uid)
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);
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}
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// Save the author information for the like in case we need to relay to Diaspora
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store_diaspora_like_sig($activity, $post_type, $contact, $post_id);
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$arr['id'] = $post_id;
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call_hooks('post_local_end', $arr);
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proc_run('php',"include/notifier.php","like","$post_id");
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like_content_return($a->get_baseurl(), $return_path);
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killme(); // NOTREACHED
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// return; // NOTREACHED
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}
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// Decide how to return. If we were called with a 'return' argument,
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// then redirect back to the calling page. If not, just quietly end
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function like_content_return($baseurl, $return_path) {
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if($return_path) {
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$rand = '_=' . time();
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if(strpos($return_path, '?')) $rand = "&$rand";
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else $rand = "?$rand";
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goaway($baseurl . "/" . $return_path . $rand);
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}
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killme();
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}
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function store_diaspora_like_retract_sig($activity, $item, $like_item, $contact) {
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// Note that we can only create a signature for a user of the local server. We don't have
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// a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it
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// means we are the relay, and for relayable_retractions, Diaspora
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// only checks the parent_author_signature if it doesn't have to relay further
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//
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// If $item['resource-id'] exists, it means the item is a photo. Diaspora doesn't support
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// likes on photos, so don't bother.
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$enabled = intval(get_config('system','diaspora_enabled'));
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if(! $enabled) {
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logger('mod_like: diaspora support disabled, not storing like retraction signature', LOGGER_DEBUG);
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return;
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}
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logger('mod_like: storing diaspora like retraction signature');
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if(($activity === ACTIVITY_LIKE) && (! $item['resource-id'])) {
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$signed_text = $like_item['guid'] . ';' . 'Like';
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// Only works for NETWORK_DFRN
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$contact_baseurl_start = strpos($contact['url'],'://') + 3;
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$contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start;
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$contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length);
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$diaspora_handle = $contact['nick'] . '@' . $contact_baseurl;
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// Get contact's private key if he's a user of the local Friendica server
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$r = q("SELECT `contact`.`uid` FROM `contact` WHERE `url` = '%s' AND `self` = 1 LIMIT 1",
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dbesc($contact['url'])
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);
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if( $r) {
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$contact_uid = $r['uid'];
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$r = q("SELECT prvkey FROM user WHERE uid = %d LIMIT 1",
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intval($contact_uid)
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);
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if( $r)
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$authorsig = base64_encode(rsa_sign($signed_text,$r['prvkey'],'sha256'));
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}
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if(! isset($authorsig))
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$authorsig = '';
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q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
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intval($like_item['id']),
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dbesc($signed_text),
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dbesc($authorsig),
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dbesc($diaspora_handle)
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);
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}
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return;
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}
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function store_diaspora_like_sig($activity, $post_type, $contact, $post_id) {
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// Note that we can only create a signature for a user of the local server. We don't have
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// a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it
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// means we are the relay, and for relayable_retractions, Diaspora
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// only checks the parent_author_signature if it doesn't have to relay further
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$enabled = intval(get_config('system','diaspora_enabled'));
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if(! $enabled) {
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logger('mod_like: diaspora support disabled, not storing like signature', LOGGER_DEBUG);
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return;
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}
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logger('mod_like: storing diaspora like signature');
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if(($activity === ACTIVITY_LIKE) && ($post_type === t('status'))) {
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// Only works for NETWORK_DFRN
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$contact_baseurl_start = strpos($contact['url'],'://') + 3;
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$contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start;
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$contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length);
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$diaspora_handle = $contact['nick'] . '@' . $contact_baseurl;
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// Get contact's private key if he's a user of the local Friendica server
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$r = q("SELECT `contact`.`uid` FROM `contact` WHERE `url` = '%s' AND `self` = 1 LIMIT 1",
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dbesc($contact['url'])
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);
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if( $r) {
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$contact_uid = $r['uid'];
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$r = q("SELECT prvkey FROM user WHERE uid = %d LIMIT 1",
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intval($contact_uid)
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);
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if( $r)
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$contact_uprvkey = $r['prvkey'];
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}
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$r = q("SELECT guid, parent FROM `item` WHERE id = %d LIMIT 1",
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intval($post_id)
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);
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if( $r) {
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$p = q("SELECT guid FROM `item` WHERE id = %d AND parent = %d LIMIT 1",
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intval($r[0]['parent']),
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intval($r[0]['parent'])
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);
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if( $p) {
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$signed_text = $r[0]['guid'] . ';Post;' . $p[0]['guid'] . ';true;' . $diaspora_handle;
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if(isset($contact_uprvkey))
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$authorsig = base64_encode(rsa_sign($signed_text,$contact_uprvkey,'sha256'));
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else
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$authorsig = '';
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q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
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intval($post_id),
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dbesc($signed_text),
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dbesc($authorsig),
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dbesc($diaspora_handle)
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);
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}
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}
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}
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return;
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}
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