]> git.mxchange.org Git - friendica.git/commitdiff
Reworked delivery
authorMichael <heluecht@pirati.ca>
Wed, 25 Apr 2018 21:18:21 +0000 (21:18 +0000)
committerMichael <heluecht@pirati.ca>
Wed, 25 Apr 2018 21:18:21 +0000 (21:18 +0000)
boot.php
src/Worker/Delivery.php

index 1ca8b8d8d8ccf720c977887789c6ebd5f8ade8cf..84bb9741e695319a23efa0129a30e365b8652bbb 100644 (file)
--- a/boot.php
+++ b/boot.php
@@ -486,6 +486,16 @@ define('SR_SCOPE_TAGS', 'tags');
  */
 define('NULL_DATE', '0001-01-01 00:00:00');
 
+/**
+ * Deliver commands
+ */
+define('DELIVER_MAIL',       'mail');
+define('DELIVER_SUGGESTION', 'suggest');
+define('DELIVER_RELOCATION', 'relocate');
+define('DELIVER_DELETION',   'drop');
+define('DELIVER_POST',       'wall-new');
+define('DELIVER_COMMENT',    'comment-new');
+
 // Normally this constant is defined - but not if "pcntl" isn't installed
 if (!defined("SIGTERM")) {
        define("SIGTERM", 15);
index 0a71e6ce29b4d26de3fd750c65bb274be9e884e0..e8c21fb38d5bfc0d870dbba2d46d972755d40e92 100644 (file)
@@ -27,52 +27,35 @@ class Delivery {
 
                logger('delivery: invoked: '.$cmd.': '.$item_id.' to '.$contact_id, LOGGER_DEBUG);
 
-               $mail = false;
-               $fsuggest = false;
-               $relocate = false;
                $top_level = false;
                $recipients = [];
                $followup = false;
 
-               $normal_mode = true;
-
-               $item = null;
-
                $recipients[] = $contact_id;
 
-               if ($cmd === 'mail') {
-                       $normal_mode = false;
-                       $mail = true;
-                       $message = q("SELECT * FROM `mail` WHERE `id` = %d LIMIT 1",
-                                       intval($item_id)
-                       );
-                       if (!count($message)) {
+               if ($cmd == DELIVER_MAIL) {
+                       $target_item = dba::selectFirst('mail', [], ['id' => $item_id]);
+                       if (!DBM::is_result($message)) {
                                return;
                        }
-                       $uid = $message[0]['uid'];
-                       $recipients[] = $message[0]['contact-id'];
-                       $item = $message[0];
-               } elseif ($cmd === 'suggest') {
-                       $normal_mode = false;
-                       $fsuggest = true;
-
-                       $suggest = q("SELECT * FROM `fsuggest` WHERE `id` = %d LIMIT 1",
-                               intval($item_id)
-                       );
-                       if (!count($suggest)) {
+                       $uid = $target_item['uid'];
+                       $recipients[] = $target_item['contact-id'];
+               } elseif ($cmd == DELIVER_SUGGESTION) {
+                       $target_item = dba::selectFirst('fsuggest', [], ['id' => $item_id]);
+                       if (!DBM::is_result($message)) {
                                return;
                        }
-                       $uid = $suggest[0]['uid'];
-                       $recipients[] = $suggest[0]['cid'];
-                       $item = $suggest[0];
-               } elseif ($cmd === 'relocate') {
-                       $normal_mode = false;
-                       $relocate = true;
+                       $uid = $target_item['uid'];
+                       $recipients[] = $target_item['contact-id'];
+               } elseif ($cmd == DELIVER_RELOCATION) {
                        $uid = $item_id;
                } else {
                        // find ancestors
-                       $target_item = dba::fetch_first("SELECT `item`.*, `contact`.`uid` AS `cuid` FROM `item`
+                       $target_item = dba::fetch_first("SELECT `item`.*, `contact`.`uid` AS `cuid`,
+                                                               `sign`.`signed_text`,`sign`.`signature`,`sign`.`signer`
+                                                       FROM `item`
                                                        INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
+                                                       LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
                                                        WHERE `item`.`id` = ? AND `visible` AND NOT `moderated`", $item_id);
 
                        if (!DBM::is_result($target_item) || !intval($target_item['parent'])) {
@@ -84,11 +67,12 @@ class Delivery {
                        $updated = $target_item['edited'];
 
                        $items = q("SELECT `item`.*, `sign`.`signed_text`,`sign`.`signature`,`sign`.`signer`
-                               FROM `item` LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id` WHERE `parent` = %d AND visible = 1 AND moderated = 0 ORDER BY `id` ASC",
+                               FROM `item` LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`
+                               WHERE `parent` = %d AND visible = 1 AND moderated = 0 ORDER BY `id` ASC",
                                intval($parent_id)
                        );
 
-                       if (!count($items)) {
+                       if (!DBM::is_result($items)) {
                                return;
                        }
 
@@ -105,7 +89,7 @@ class Delivery {
                                        WHERE `id` IN ( $str_contacts ) "
                                );
                        }
-                       if ( !($icontacts && count($icontacts))) {
+                       if (!DBM::is_result($icontacts)) {
                                return;
                        }
 
@@ -136,7 +120,7 @@ class Delivery {
 
                $public_message = true;
 
-               if (!$mail && !$fsuggest && !$relocate) {
+               if (!in_array($cmd, [DELIVER_MAIL, DELIVER_SUGGESTION, DELIVER_RELOCATION])) {
                        $parent = $items[0];
 
                        // This is IMPORTANT!!!!
@@ -159,13 +143,7 @@ class Delivery {
                         *
                         */
 
-                       $relay_to_owner = false;
-
                        if (!$top_level && ($parent['wall'] == 0) && stristr($target_item['uri'], $localhost)) {
-                               $relay_to_owner = true;
-                       }
-
-                       if ($relay_to_owner) {
                                logger('followup '.$target_item["guid"], LOGGER_DEBUG);
                                // local followup to remote post
                                $followup = true;
@@ -178,7 +156,6 @@ class Delivery {
                                || $parent["private"]) {
                                $public_message = false; // private recipients, not public
                        }
-
                }
 
                // We don't deliver our items to blocked or pending contacts, and not to ourselves either
@@ -196,139 +173,16 @@ class Delivery {
                        $contact['network'] = NETWORK_DIASPORA;
                }
 
-               logger("main delivery by delivery: followup=$followup mail=$mail fsuggest=$fsuggest relocate=$relocate - network ".$contact['network']);
+               logger("Delivering " . $cmd . " followup=$followup - network ".$contact['network']);
 
                switch ($contact['network']) {
 
                        case NETWORK_DFRN:
-                               logger('notifier: '.$target_item["guid"].' dfrndelivery: '.$contact['name']);
-
-                               if ($mail) {
-                                       $item['body'] = Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
-                                       $atom = DFRN::mail($item, $owner);
-                               } elseif ($fsuggest) {
-                                       $atom = DFRN::fsuggest($item, $owner);
-                                       dba::delete('fsuggest', ['id' => $item['id']]);
-                               } elseif ($relocate) {
-                                       $atom = DFRN::relocate($owner, $uid);
-                               } elseif ($followup) {
-                                       $msgitems = [];
-                                       foreach ($items as $item) {  // there is only one item
-                                               if (!$item['parent']) {
-                                                       return;
-                                               }
-                                               if ($item['id'] == $item_id) {
-                                                       logger('followup: item: '. print_r($item,true), LOGGER_DATA);
-                                                       $msgitems[] = $item;
-                                               }
-                                       }
-                                       $atom = DFRN::entries($msgitems,$owner);
-                               } else {
-                                       $msgitems = [];
-                                       foreach ($items as $item) {
-                                               if (!$item['parent']) {
-                                                       return;
-                                               }
-
-                                               // private emails may be in included in public conversations. Filter them.
-                                               if ($public_message && $item['private']) {
-                                                       return;
-                                               }
-
-                                               $item_contact = self::getItemContact($item,$icontacts);
-                                               if (!$item_contact) {
-                                                       return;
-                                               }
-
-                                               if ($normal_mode) {
-                                                       // Only add the parent when we don't delete other items.
-                                                       if ($item_id == $item['id'] || (($item['id'] == $item['parent']) && ($cmd != 'drop'))) {
-                                                               $item["entry:comment-allow"] = true;
-                                                               $item["entry:cid"] = (($top_level) ? $contact['id'] : 0);
-                                                               $msgitems[] = $item;
-                                                       }
-                                               } else {
-                                                       $item["entry:comment-allow"] = true;
-                                                       $msgitems[] = $item;
-                                               }
-                                       }
-                                       $atom = DFRN::entries($msgitems,$owner);
-                               }
-
-                               logger('notifier entry: '.$contact["url"].' '.$target_item["guid"].' entry: '.$atom, LOGGER_DEBUG);
-
-                               logger('notifier: '.$atom, LOGGER_DATA);
-                               $basepath =  implode('/', array_slice(explode('/',$contact['url']),0,3));
-
-                               // perform local delivery if we are on the same site
-
-                               if (link_compare($basepath,System::baseUrl())) {
-                                       $nickname = basename($contact['url']);
-                                       if ($contact['issued-id']) {
-                                               $sql_extra = sprintf(" AND `dfrn-id` = '%s' ", dbesc($contact['issued-id']));
-                                       } else {
-                                               $sql_extra = sprintf(" AND `issued-id` = '%s' ", dbesc($contact['dfrn-id']));
-                                       }
-
-                                       $x = q("SELECT  `contact`.*, `contact`.`uid` AS `importer_uid`,
-                                               `contact`.`pubkey` AS `cpubkey`,
-                                               `contact`.`prvkey` AS `cprvkey`,
-                                               `contact`.`thumb` AS `thumb`,
-                                               `contact`.`url` as `url`,
-                                               `contact`.`name` as `senderName`,
-                                               `user`.*
-                                               FROM `contact`
-                                               INNER JOIN `user` ON `contact`.`uid` = `user`.`uid`
-                                               WHERE `contact`.`blocked` = 0 AND `contact`.`pending` = 0
-                                               AND `contact`.`network` = '%s' AND `user`.`nickname` = '%s'
-                                               $sql_extra
-                                               AND `user`.`account_expired` = 0 AND `user`.`account_removed` = 0 LIMIT 1",
-                                               dbesc(NETWORK_DFRN),
-                                               dbesc($nickname)
-                                       );
-
-                                       if ($x && count($x)) {
-                                               $write_flag = ((($x[0]['rel']) && ($x[0]['rel'] != CONTACT_IS_SHARING)) ? true : false);
-                                               if ((($owner['page-flags'] == PAGE_COMMUNITY) || $write_flag) && !$x[0]['writable']) {
-                                                       dba::update('contact', ['writable' => true], ['id' => $x[0]['id']]);
-                                                       $x[0]['writable'] = 1;
-                                               }
-
-                                               $ssl_policy = Config::get('system','ssl_policy');
-                                               $x[0] = Contact::updateSslPolicy($x[0], $ssl_policy);
-
-                                               // If we are setup as a soapbox we aren't accepting top level posts from this person
-
-                                               if (($x[0]['page-flags'] == PAGE_SOAPBOX) && $top_level) {
-                                                       break;
-                                               }
-                                               logger('mod-delivery: local delivery');
-                                               DFRN::import($atom, $x[0]);
-                                               break;
-                                       }
-                               }
-
-                               if (!Queue::wasDelayed($contact['id'])) {
-                                       $deliver_status = DFRN::deliver($owner, $contact, $atom);
-                               } else {
-                                       $deliver_status = -1;
-                               }
-
-                               logger('notifier: dfrn_delivery to '.$contact["url"].' with guid '.$target_item["guid"].' returns '.$deliver_status);
-
-                               if ($deliver_status < 0) {
-                                       logger('notifier: delivery failed: queuing message');
-                                       Queue::add($contact['id'], NETWORK_DFRN, $atom, false, $target_item['guid']);
-                               }
-
-                               if (($deliver_status >= 200) && ($deliver_status <= 299)) {
-                                       // We successfully delivered a message, the contact is alive
-                                       Contact::unmarkForArchival($contact);
-                               } else {
-                                       // The message could not be delivered. We mark the contact as "dead"
-                                       Contact::markForArchival($contact);
-                               }
+                               self::deliverDFRN($cmd, $contact, $icontacts, $owner, $items, $target_item, $public_message, $top_level, $followup);
+                               break;
 
+                       case NETWORK_DIASPORA:
+                               self::deliverDiaspora($cmd, $contact, $owner, $target_item, $public_message, $top_level, $followup, $walltowall);
                                break;
 
                        case NETWORK_OSTATUS:
@@ -345,163 +199,253 @@ class Delivery {
                                break;
 
                        case NETWORK_MAIL:
+                               self::deliverMail($cmd, $contact, $owner, $target_item);
+                               break;
 
-                               if (Config::get('system','dfrn_only')) {
-                                       break;
-                               }
-                               // WARNING: does not currently convert to RFC2047 header encodings, etc.
+                       default:
+                               break;
+               }
 
-                               $addr = $contact['addr'];
-                               if (!strlen($addr)) {
-                                       break;
+               return;
+       }
+
+       private static function deliverDFRN($cmd, $contact, $icontacts, $owner, $items, $target_item, $public_message, $top_level, $followup)
+       {
+               logger('notifier: '.$target_item["guid"].' dfrndelivery: '.$contact['name']);
+
+               if ($cmd == DELIVER_MAIL) {
+                       $item = $target_item;
+                       $item['body'] = Item::fixPrivatePhotos($item['body'], $owner['uid'], null, $item['contact-id']);
+                       $atom = DFRN::mail($item, $owner);
+               } elseif ($cmd == DELIVER_SUGGESTION) {
+                       $item = $target_item;
+                       $atom = DFRN::fsuggest($item, $owner);
+                       dba::delete('fsuggest', ['id' => $item['id']]);
+               } elseif ($cmd == DELIVER_RELOCATION) {
+                       $atom = DFRN::relocate($owner, $owner['uid']);
+               } elseif ($followup) {
+                       $msgitems = [];
+                       $msgitems[] = $target_item;
+                       $atom = DFRN::entries($msgitems, $owner);
+               } else {
+                       $msgitems = [];
+                       foreach ($items as $item) {
+                               if (!$item['parent']) {
+                                       return;
                                }
 
-                               if ($cmd === 'wall-new' || $cmd === 'comment-new') {
-                                       $it = null;
-                                       if ($cmd === 'wall-new') {
-                                               $it = $items[0];
-                                       } else {
-                                               $r = q("SELECT * FROM `item` WHERE `id` = %d LIMIT 1",
-                                                       intval($item_id)
-                                               );
-                                               if (DBM::is_result($r)) {
-                                                       $it = $r[0];
-                                               }
-                                       }
-                                       if (!$it) {
-                                               break;
-                                       }
+                               // private emails may be in included in public conversations. Filter them.
+                               if ($public_message && $item['private']) {
+                                       return;
+                               }
 
-                                       $local_user = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
-                                               intval($uid)
-                                       );
-                                       if (!count($local_user)) {
-                                               break;
-                                       }
+                               $item_contact = self::getItemContact($item, $icontacts);
+                               if (!$item_contact) {
+                                       return;
+                               }
 
-                                       $reply_to = '';
-                                       $r1 = q("SELECT * FROM `mailacct` WHERE `uid` = %d LIMIT 1",
-                                               intval($uid)
-                                       );
-                                       if ($r1 && $r1[0]['reply_to']) {
-                                               $reply_to = $r1[0]['reply_to'];
+                               if (!in_array($cmd, [DELIVER_MAIL, DELIVER_SUGGESTION, DELIVER_RELOCATION])) {
+                                       // Only add the parent when we don't delete other items.
+                                       if ($target_item['id'] == $item['id'] || (($item['id'] == $item['parent']) && ($cmd != DELIVER_DELETION))) {
+                                               $item["entry:comment-allow"] = true;
+                                               $item["entry:cid"] = ($top_level ? $contact['id'] : 0);
+                                               $msgitems[] = $item;
                                        }
+                               } else {
+                                       $item["entry:comment-allow"] = true;
+                                       $msgitems[] = $item;
+                               }
+                       }
+                       $atom = DFRN::entries($msgitems,$owner);
+               }
 
-                                       $subject  = (($it['title']) ? Email::encodeHeader($it['title'],'UTF-8') : L10n::t("\x28no subject\x29")) ;
+               logger('notifier entry: '.$contact["url"].' '.$target_item["guid"].' entry: '.$atom, LOGGER_DEBUG);
 
-                                       // only expose our real email address to true friends
+               logger('notifier: '.$atom, LOGGER_DATA);
+               $basepath =  implode('/', array_slice(explode('/',$contact['url']),0,3));
 
-                                       if (($contact['rel'] == CONTACT_IS_FRIEND) && !$contact['blocked']) {
-                                               if ($reply_to) {
-                                                       $headers  = 'From: '.Email::encodeHeader($local_user[0]['username'],'UTF-8').' <'.$reply_to.'>'."\n";
-                                                       $headers .= 'Sender: '.$local_user[0]['email']."\n";
-                                               } else {
-                                                       $headers  = 'From: '.Email::encodeHeader($local_user[0]['username'],'UTF-8').' <'.$local_user[0]['email'].'>'."\n";
-                                               }
-                                       } else {
-                                               $headers  = 'From: '. Email::encodeHeader($local_user[0]['username'], 'UTF-8') . ' <noreply@' . $a->get_hostname() . '>' . "\n";
-                                       }
+               // perform local delivery if we are on the same site
 
-                                       //if ($reply_to)
-                                       //      $headers .= 'Reply-to: '.$reply_to . "\n";
-
-                                       $headers .= 'Message-Id: <'. Email::iri2msgid($it['uri']).'>'. "\n";
-
-                                       //logger("Mail: uri: ".$it['uri']." parent-uri ".$it['parent-uri'], LOGGER_DEBUG);
-                                       //logger("Mail: Data: ".print_r($it, true), LOGGER_DEBUG);
-                                       //logger("Mail: Data: ".print_r($it, true), LOGGER_DATA);
-
-                                       if ($it['uri'] !== $it['parent-uri']) {
-                                               $headers .= "References: <".Email::iri2msgid($it["parent-uri"]).">";
-
-                                               // If Threading is enabled, write down the correct parent
-                                               if (($it["thr-parent"] != "") && ($it["thr-parent"] != $it["parent-uri"])) {
-                                                       $headers .= " <".Email::iri2msgid($it["thr-parent"]).">";
-                                               }
-                                               $headers .= "\n";
-
-                                               if (!$it['title']) {
-                                                       $r = q("SELECT `title` FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
-                                                               dbesc($it['parent-uri']),
-                                                               intval($uid));
-
-                                                       if (DBM::is_result($r) && ($r[0]['title'] != '')) {
-                                                               $subject = $r[0]['title'];
-                                                       } else {
-                                                               $r = q("SELECT `title` FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d LIMIT 1",
-                                                                       dbesc($it['parent-uri']),
-                                                                       intval($uid));
-
-                                                               if (DBM::is_result($r) && ($r[0]['title'] != '')) {
-                                                                       $subject = $r[0]['title'];
-                                                               }
-                                                       }
-                                               }
-                                               if (strncasecmp($subject,'RE:',3)) {
-                                                       $subject = 'Re: '.$subject;
-                                               }
-                                       }
-                                       Email::send($addr, $subject, $headers, $it);
+               if (link_compare($basepath, System::baseUrl())) {
+                       $condition = ['nurl' => normalise_link($contact['url']), 'self' => true];
+                       $target_self = dba::selectFirst('contact', ['uid'], $condition);
+                       if (!DBM::is_result($target_self)) {
+                               return;
+                       }
+                       $target_uid = $target_self['uid'];
+
+                       // Check if the user has got this contact
+                       $cid = Contact::getIdForURL($owner['url'], $target_uid);
+                       if (!$cid) {
+                               // Otherwise there should be a public contact
+                               $cid = Contact::getIdForURL($owner['url']);
+                               if (!$cid) {
+                                       return;
                                }
-                               break;
+                       }
 
-                       case NETWORK_DIASPORA:
-                               if ($public_message) {
-                                       $loc = 'public batch '.$contact['batch'];
-                               } else {
-                                       $loc = $contact['name'];
-                               }
+                       // We now have some contact, so we fetch it
+                       $target_importer = dba::fetch_first("SELECT *, `name` as `senderName`
+                                                       FROM `contact`
+                                                       WHERE NOT `blocked` AND `id` = ? LIMIT 1",
+                                                       $cid);
 
-                               logger('delivery: diaspora batch deliver: '.$loc);
+                       // This should never fail
+                       if (!DBM::is_result($target_importer)) {
+                               return;
+                       }
 
-                               if (Config::get('system','dfrn_only') || !Config::get('system','diaspora_enabled')) {
-                                       break;
-                               }
-                               if ($mail) {
-                                       Diaspora::sendMail($item,$owner,$contact);
-                                       break;
-                               }
+                       // Set the user id. This is important if this is a public contact
+                       $target_importer['importer_uid']  = $target_uid;
+                       DFRN::import($atom, $target_importer);
+                       return;
+               }
 
-                               if (!$normal_mode) {
-                                       break;
-                               }
-                               if (!$contact['pubkey'] && !$public_message) {
-                                       break;
-                               }
-                               if (($target_item['deleted']) && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
-                                       // top-level retraction
-                                       logger('diaspora retract: '.$loc);
-                                       Diaspora::sendRetraction($target_item,$owner,$contact,$public_message);
-                                       break;
-                               } elseif ($relocate) {
-                                       Diaspora::sendAccountMigration($owner, $contact, $uid);
-                                       break;
-                               } elseif ($followup) {
-                                       // send comments and likes to owner to relay
-                                       logger('diaspora followup: '.$loc);
-                                       Diaspora::sendFollowup($target_item,$owner,$contact,$public_message);
-                                       break;
-                               } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
-                                       // we are the relay - send comments, likes and relayable_retractions to our conversants
-                                       logger('diaspora relay: '.$loc);
-                                       Diaspora::sendRelay($target_item,$owner,$contact,$public_message);
-                                       break;
-                               } elseif ($top_level && !$walltowall) {
-                                       // currently no workable solution for sending walltowall
-                                       logger('diaspora status: '.$loc);
-                                       Diaspora::sendStatus($target_item,$owner,$contact,$public_message);
-                                       break;
-                               }
+               if (!Queue::wasDelayed($contact['id'])) {
+                       $deliver_status = DFRN::deliver($owner, $contact, $atom);
+               } else {
+                       $deliver_status = -1;
+               }
 
-                               logger('delivery: diaspora unknown mode: '.$contact['name']);
+               logger('notifier: dfrn_delivery to '.$contact["url"].' with guid '.$target_item["guid"].' returns '.$deliver_status);
 
-                               break;
+               if ($deliver_status < 0) {
+                       logger('notifier: delivery failed: queuing message');
+                       Queue::add($contact['id'], NETWORK_DFRN, $atom, false, $target_item['guid']);
+               }
 
-                       default:
-                               break;
+               if (($deliver_status >= 200) && ($deliver_status <= 299)) {
+                       // We successfully delivered a message, the contact is alive
+                       Contact::unmarkForArchival($contact);
+               } else {
+                       // The message could not be delivered. We mark the contact as "dead"
+                       Contact::markForArchival($contact);
                }
+       }
 
-               return;
+       private static function deliverDiaspora($cmd, $contact, $owner, $target_item, $public_message, $top_level, $followup, $walltowall)
+       {
+               if ($public_message) {
+                       $loc = 'public batch ' . $contact['batch'];
+               } else {
+                       $loc = $contact['name'];
+               }
+
+               logger('delivery: diaspora batch deliver: ' . $loc);
+
+               if (Config::get('system', 'dfrn_only') || !Config::get('system', 'diaspora_enabled')) {
+                       return;
+               }
+               if ($cmd == DELIVER_MAIL) {
+                       Diaspora::sendMail($target_item, $owner, $contact);
+                       return;
+               }
+
+               if ($cmd == DELIVER_SUGGESTION) {
+                       return;
+               }
+               if (!$contact['pubkey'] && !$public_message) {
+                       return;
+               }
+               if (($target_item['deleted']) && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
+                       // top-level retraction
+                       logger('diaspora retract: ' . $loc);
+                       Diaspora::sendRetraction($target_item, $owner, $contact, $public_message);
+                       return;
+               } elseif ($cmd == DELIVER_RELOCATION) {
+                       Diaspora::sendAccountMigration($owner, $contact, $owner['uid']);
+                       return;
+               } elseif ($followup) {
+                       // send comments and likes to owner to relay
+                       logger('diaspora followup: ' . $loc);
+                       Diaspora::sendFollowup($target_item, $owner, $contact, $public_message);
+                       return;
+               } elseif ($target_item['uri'] !== $target_item['parent-uri']) {
+                       // we are the relay - send comments, likes and relayable_retractions to our conversants
+                       logger('diaspora relay: ' . $loc);
+                       Diaspora::sendRelay($target_item, $owner, $contact, $public_message);
+                       return;
+               } elseif ($top_level && !$walltowall) {
+                       // currently no workable solution for sending walltowall
+                       logger('diaspora status: ' . $loc);
+                       Diaspora::sendStatus($target_item, $owner, $contact, $public_message);
+                       return;
+               }
+
+               logger('Unknown mode ' . $cmd . ' for '.$contact['name']);
+       }
+
+       private static function deliverMail($cmd, $contact, $owner, $target_item)
+       {
+               if (Config::get('system','dfrn_only')) {
+                       return;
+               }
+               // WARNING: does not currently convert to RFC2047 header encodings, etc.
+
+               $addr = $contact['addr'];
+               if (!strlen($addr)) {
+                       return;
+               }
+
+               if (!in_array($cmd, [DELIVER_POST, DELIVER_COMMENT])) {
+                       return;
+               }
+
+               $local_user = dba::selectFirst('user', [], ['uid' => $owner['uid']]);
+               if (!DBM::is_result($local_user)) {
+                       return;
+               }
+
+               $reply_to = '';
+               $mailacct = dba::selectFirst('mailacct', ['reply_to'], ['uid' => $owner['uid']]);
+               if (DBM::is_result($mailacct) && !empty($mailacct['reply_to'])) {
+                       $reply_to = $mailacct['reply_to'];
+               }
+
+               $subject  = (($target_item['title']) ? Email::encodeHeader($target_item['title'], 'UTF-8') : L10n::t("\x28no subject\x29"));
+
+               // only expose our real email address to true friends
+
+               if (($contact['rel'] == CONTACT_IS_FRIEND) && !$contact['blocked']) {
+                       if ($reply_to) {
+                               $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8') . ' <' . $reply_to.'>' . "\n";
+                               $headers .= 'Sender: ' . $local_user['email'] . "\n";
+                       } else {
+                               $headers  = 'From: ' . Email::encodeHeader($local_user['username'],'UTF-8').' <' . $local_user['email'] . '>' . "\n";
+                       }
+               } else {
+                       $headers  = 'From: '. Email::encodeHeader($local_user['username'], 'UTF-8') . ' <noreply@' . $a->get_hostname() . '>' . "\n";
+               }
+
+               $headers .= 'Message-Id: <' . Email::iri2msgid($target_item['uri']) . '>' . "\n";
+
+               if ($target_item['uri'] !== $target_item['parent-uri']) {
+                       $headers .= "References: <" . Email::iri2msgid($target_item["parent-uri"]) . ">";
+
+                       // If Threading is enabled, write down the correct parent
+                       if (($target_item["thr-parent"] != "") && ($target_item["thr-parent"] != $target_item["parent-uri"])) {
+                               $headers .= " <".Email::iri2msgid($target_item["thr-parent"]).">";
+                       }
+                       $headers .= "\n";
+
+                       if (empty($target_item['title'])) {
+                               $condition = ['uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
+                               $title = dba::selectFirst('item', ['title'], $condition);
+                               if (DBM::is_result($title) && ($title['title'] != '')) {
+                                       $subject = $title['title'];
+                               } else {
+                                       $condition = ['parent-uri' => $target_item['parent-uri'], 'uid' => $owner['uid']];
+                                       $title = dba::selectFirst('item', ['title'], $condition);
+                                       if (DBM::is_result($title) && ($title['title'] != '')) {
+                                               $subject = $title['title'];
+                                       }
+                               }
+                       }
+                       if (strncasecmp($subject,  'RE:', 3)) {
+                               $subject = 'Re: ' . $subject;
+                       }
+               }
+               Email::send($addr, $subject, $headers, $it);
        }
 
        private static function getItemContact($item, $contacts)