+}
+
+
+// Decide how to return. If we were called with a 'return' argument,
+// then redirect back to the calling page. If not, just quietly end
+
+function like_content_return($baseurl, $return_path) {
+
+ if($return_path) {
+ $rand = '_=' . time();
+ if(strpos($return_path, '?')) $rand = "&$rand";
+ else $rand = "?$rand";
+
+ goaway($baseurl . "/" . $return_path . $rand);
+ }
+
+ killme();
+}
+
+
+function store_diaspora_like_retract_sig($activity, $item, $like_item, $contact) {
+ // Note that we can only create a signature for a user of the local server. We don't have
+ // a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it
+ // means we are the relay, and for relayable_retractions, Diaspora
+ // only checks the parent_author_signature if it doesn't have to relay further
+ //
+ // If $item['resource-id'] exists, it means the item is a photo. Diaspora doesn't support
+ // likes on photos, so don't bother.
+
+ $enabled = intval(get_config('system','diaspora_enabled'));
+ if(! $enabled) {
+ logger('mod_like: diaspora support disabled, not storing like retraction signature', LOGGER_DEBUG);
+ return;
+ }
+
+ logger('mod_like: storing diaspora like retraction signature');
+
+ if(($activity === ACTIVITY_LIKE) && (! $item['resource-id'])) {
+ $signed_text = $like_item['guid'] . ';' . 'Like';
+
+ // Only works for NETWORK_DFRN
+ $contact_baseurl_start = strpos($contact['url'],'://') + 3;
+ $contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start;
+ $contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length);
+ $diaspora_handle = $contact['nick'] . '@' . $contact_baseurl;
+
+ // Get contact's private key if he's a user of the local Friendica server
+ $r = q("SELECT `contact`.`uid` FROM `contact` WHERE `url` = '%s' AND `self` = 1 LIMIT 1",
+ dbesc($contact['url'])
+ );
+
+ if( $r) {
+ $contact_uid = $r['uid'];
+ $r = q("SELECT prvkey FROM user WHERE uid = %d LIMIT 1",
+ intval($contact_uid)
+ );
+
+ if( $r)
+ $authorsig = base64_encode(rsa_sign($signed_text,$r['prvkey'],'sha256'));
+ }
+
+ if(! isset($authorsig))
+ $authorsig = '';
+
+ q("insert into sign (`retract_iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+ intval($like_item['id']),
+ dbesc($signed_text),
+ dbesc($authorsig),
+ dbesc($diaspora_handle)
+ );
+ }
+
+ return;
+}
+
+function store_diaspora_like_sig($activity, $post_type, $contact, $post_id) {
+ // Note that we can only create a signature for a user of the local server. We don't have
+ // a key for remote users. That is ok, because if a remote user is "unlike"ing a post, it
+ // means we are the relay, and for relayable_retractions, Diaspora
+ // only checks the parent_author_signature if it doesn't have to relay further
+
+ $enabled = intval(get_config('system','diaspora_enabled'));
+ if(! $enabled) {
+ logger('mod_like: diaspora support disabled, not storing like signature', LOGGER_DEBUG);
+ return;
+ }
+
+ logger('mod_like: storing diaspora like signature');
+
+ if(($activity === ACTIVITY_LIKE) && ($post_type === t('status'))) {
+ // Only works for NETWORK_DFRN
+ $contact_baseurl_start = strpos($contact['url'],'://') + 3;
+ $contact_baseurl_length = strpos($contact['url'],'/profile') - $contact_baseurl_start;
+ $contact_baseurl = substr($contact['url'], $contact_baseurl_start, $contact_baseurl_length);
+ $diaspora_handle = $contact['nick'] . '@' . $contact_baseurl;
+
+ // Get contact's private key if he's a user of the local Friendica server
+ $r = q("SELECT `contact`.`uid` FROM `contact` WHERE `url` = '%s' AND `self` = 1 LIMIT 1",
+ dbesc($contact['url'])
+ );
+
+ if( $r) {
+ $contact_uid = $r['uid'];
+ $r = q("SELECT prvkey FROM user WHERE uid = %d LIMIT 1",
+ intval($contact_uid)
+ );
+
+ if( $r)
+ $contact_uprvkey = $r['prvkey'];
+ }
+
+ $r = q("SELECT guid, parent FROM `item` WHERE id = %d LIMIT 1",
+ intval($post_id)
+ );
+ if( $r) {
+ $p = q("SELECT guid FROM `item` WHERE id = %d AND parent = %d LIMIT 1",
+ intval($r[0]['parent']),
+ intval($r[0]['parent'])
+ );
+ if( $p) {
+ $signed_text = $r[0]['guid'] . ';Post;' . $p[0]['guid'] . ';true;' . $diaspora_handle;
+
+ if(isset($contact_uprvkey))
+ $authorsig = base64_encode(rsa_sign($signed_text,$contact_uprvkey,'sha256'));
+ else
+ $authorsig = '';
+
+ q("insert into sign (`iid`,`signed_text`,`signature`,`signer`) values (%d,'%s','%s','%s') ",
+ intval($post_id),
+ dbesc($signed_text),
+ dbesc($authorsig),
+ dbesc($diaspora_handle)
+ );
+ }
+ }
+ }
+
+ return;
+}