]> git.mxchange.org Git - friendica.git/blobdiff - src/Protocol/DFRN.php
Move Contact::Page_* constants to User::PAGE_FLAGS_*
[friendica.git] / src / Protocol / DFRN.php
index 1ab4d8f9e4959592cf887e9f09f651989de53455..550f5e07f17202dd85270733e4bafa2468a080f6 100644 (file)
@@ -14,9 +14,9 @@ use Friendica\App;
 use Friendica\Content\OEmbed;
 use Friendica\Content\Text\BBCode;
 use Friendica\Content\Text\HTML;
-use Friendica\Core\Addon;
 use Friendica\Core\Config;
-use Friendica\Core\L10n;
+use Friendica\Core\Hook;
+use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
 use Friendica\Core\System;
 use Friendica\Database\DBA;
@@ -32,16 +32,11 @@ use Friendica\Object\Image;
 use Friendica\Util\Crypto;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
+use Friendica\Util\Strings;
 use Friendica\Util\XML;
 use HTMLPurifier;
 use HTMLPurifier_Config;
 
-require_once 'boot.php';
-require_once 'include/dba.php';
-require_once "include/enotify.php";
-require_once "include/items.php";
-require_once "include/text.php";
-
 /**
  * @brief This class contain functions to create and send DFRN XML files
  */
@@ -61,6 +56,7 @@ class DFRN
         * @param integer $uid User id
         *
         * @return array importer
+        * @throws \Exception
         */
        public static function getImporter($cid, $uid = 0)
        {
@@ -101,7 +97,9 @@ class DFRN
         * @param array $owner Owner record
         *
         * @return string DFRN entries
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        * @todo  Find proper type-hints
         */
        public static function entries($items, $owner)
        {
@@ -139,10 +137,12 @@ class DFRN
         * @param boolean $onlyheader  Output only the header without content? (Default is "no")
         *
         * @return string DFRN feed entries
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
         */
        public static function feed($dfrn_id, $owner_nick, $last_update, $direction = 0, $onlyheader = false)
        {
-               $a = get_app();
+               $a = \get_app();
 
                $sitefeed    = ((strlen($owner_nick)) ? false : true); // not yet implemented, need to rewrite huge chunks of following logic
                $public_feed = (($dfrn_id) ? false : true);
@@ -175,30 +175,25 @@ class DFRN
                );
 
                if (! DBA::isResult($r)) {
-                       logger(sprintf('No contact found for nickname=%d', $owner_nick), LOGGER_WARNING);
-                       killme();
+                       Logger::log(sprintf('No contact found for nickname=%d', $owner_nick), Logger::WARNING);
+                       exit();
                }
 
                $owner = $r[0];
                $owner_id = $owner['uid'];
-               $owner_nick = $owner['nickname'];
 
                $sql_post_table = "";
 
                if (! $public_feed) {
-                       $sql_extra = '';
                        switch ($direction) {
                                case (-1):
                                        $sql_extra = sprintf(" AND `issued-id` = '%s' ", DBA::escape($dfrn_id));
-                                       $my_id = $dfrn_id;
                                        break;
                                case 0:
                                        $sql_extra = sprintf(" AND `issued-id` = '%s' AND `duplex` = 1 ", DBA::escape($dfrn_id));
-                                       $my_id = '1:' . $dfrn_id;
                                        break;
                                case 1:
                                        $sql_extra = sprintf(" AND `dfrn-id` = '%s' AND `duplex` = 1 ", DBA::escape($dfrn_id));
-                                       $my_id = '0:' . $dfrn_id;
                                        break;
                                default:
                                        return false;
@@ -211,12 +206,11 @@ class DFRN
                        );
 
                        if (! DBA::isResult($r)) {
-                               logger(sprintf('No contact found for uid=%d', $owner_id), LOGGER_WARNING);
-                               killme();
+                               Logger::log(sprintf('No contact found for uid=%d', $owner_id), Logger::WARNING);
+                               exit();
                        }
 
                        $contact = $r[0];
-                       include_once 'include/security.php';
 
                        $set = PermissionSet::get($owner_id, $contact['id']);
 
@@ -240,12 +234,11 @@ class DFRN
                if (isset($category)) {
                        $sql_post_table = sprintf(
                                "INNER JOIN (SELECT `oid` FROM `term` WHERE `term` = '%s' AND `otype` = %d AND `type` = %d AND `uid` = %d ORDER BY `tid` DESC) AS `term` ON `item`.`id` = `term`.`oid` ",
-                               DBA::escape(protect_sprintf($category)),
+                               DBA::escape(Strings::protectSprintf($category)),
                                intval(TERM_OBJ_POST),
                                intval(TERM_CATEGORY),
                                intval($owner_id)
                        );
-                       //$sql_extra .= file_tag_file_query('item',$category,'category');
                }
 
                if ($public_feed && ! $converse) {
@@ -301,12 +294,12 @@ class DFRN
                $root = self::addHeader($doc, $owner, $author, $alternatelink, true);
 
                /// @TODO This hook can't work anymore
-               //      Addon::callHooks('atom_feed', $atom);
+               //      \Friendica\Core\Hook::callAll('atom_feed', $atom);
 
                if (!DBA::isResult($items) || $onlyheader) {
                        $atom = trim($doc->saveXML());
 
-                       Addon::callHooks('atom_feed_end', $atom);
+                       Hook::callAll('atom_feed_end', $atom);
 
                        return $atom;
                }
@@ -335,7 +328,7 @@ class DFRN
 
                $atom = trim($doc->saveXML());
 
-               Addon::callHooks('atom_feed_end', $atom);
+               Hook::callAll('atom_feed_end', $atom);
 
                return $atom;
        }
@@ -347,6 +340,8 @@ class DFRN
         * @param boolean $conversation Show the conversation. If false show the single post.
         *
         * @return string DFRN feed entry
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
         */
        public static function itemFeed($item_id, $conversation = false)
        {
@@ -359,7 +354,7 @@ class DFRN
                $ret = Item::select(Item::DELIVER_FIELDLIST, $condition);
                $items = Item::inArray($ret);
                if (!DBA::isResult($items)) {
-                       killme();
+                       exit();
                }
 
                $item = $items[0];
@@ -367,7 +362,7 @@ class DFRN
                if ($item['uid'] != 0) {
                        $owner = User::getOwnerDataById($item['uid']);
                        if (!$owner) {
-                               killme();
+                               exit();
                        }
                } else {
                        $owner = ['uid' => 0, 'nick' => 'feed-item'];
@@ -412,7 +407,8 @@ class DFRN
         * @param array $owner Owner record
         *
         * @return string DFRN mail
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  Find proper type-hints
         */
        public static function mail($item, $owner)
        {
@@ -448,7 +444,8 @@ class DFRN
         * @param array $owner Owner record
         *
         * @return string DFRN suggestions
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  Find proper type-hints
         */
        public static function fsuggest($item, $owner)
        {
@@ -477,7 +474,8 @@ class DFRN
         * @param int   $uid   User ID
         *
         * @return string DFRN relocations
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  Find proper type-hints
         */
        public static function relocate($owner, $uid)
        {
@@ -538,7 +536,8 @@ class DFRN
         * @param bool   $public        Is it a header for public posts?
         *
         * @return object XML root object
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  Find proper type-hints
         */
        private static function addHeader($doc, $owner, $authorelement, $alternatelink = "", $public = false)
        {
@@ -588,14 +587,14 @@ class DFRN
                }
 
                // For backward compatibility we keep this element
-               if ($owner['page-flags'] == Contact::PAGE_COMMUNITY) {
+               if ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY) {
                        XML::addElement($doc, $root, "dfrn:community", 1);
                }
 
                // The former element is replaced by this one
                XML::addElement($doc, $root, "dfrn:account_type", $owner["account-type"]);
 
-               /// @todo We need a way to transmit the different page flags like "Contact::PAGE_PRVGROUP"
+               /// @todo We need a way to transmit the different page flags like "User::PAGE_FLAGS_PRVGROUP"
 
                XML::addElement($doc, $root, "updated", DateTimeFormat::utcNow(DateTimeFormat::ATOM));
 
@@ -614,7 +613,8 @@ class DFRN
         * @param boolean $public        boolean
         *
         * @return object XML author object
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  Find proper type-hints
         */
        private static function addAuthor($doc, $owner, $authorelement, $public)
        {
@@ -647,7 +647,7 @@ class DFRN
                XML::addElement($doc, $author, "dfrn:handle", $owner["addr"], $attributes);
 
                $attributes = ["rel" => "photo", "type" => "image/jpeg",
-                                       "media:width" => 175, "media:height" => 175, "href" => $owner['photo']];
+                                       "media:width" => 300, "media:height" => 300, "href" => $owner['photo']];
 
                if (!$public || !$hidewall) {
                        $attributes["dfrn:updated"] = $picdate;
@@ -689,7 +689,7 @@ class DFRN
                        XML::addElement($doc, $author, "poco:displayName", $profile["name"]);
                        XML::addElement($doc, $author, "poco:updated", $namdate);
 
-                       if (trim($profile["dob"]) > '0001-01-01') {
+                       if (trim($profile["dob"]) > DBA::NULL_DATE) {
                                XML::addElement($doc, $author, "poco:birthday", "0000-".date("m-d", strtotime($profile["dob"])));
                        }
 
@@ -758,7 +758,8 @@ class DFRN
         * @param array  $item        Item elements
         *
         * @return object XML author object
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  Find proper type-hints
         */
        private static function addEntryAuthor($doc, $element, $contact_url, $item)
        {
@@ -799,7 +800,8 @@ class DFRN
         * @param string $activity activity value
         *
         * @return object XML activity object
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  Find proper type-hints
         */
        private static function createActivity($doc, $element, $activity)
        {
@@ -864,8 +866,8 @@ class DFRN
         * @param object $root XML root
         * @param array  $item Item element
         *
-        * @return object XML attachment object
-        * @todo Find proper type-hints
+        * @return void XML attachment object
+        * @todo  Find proper type-hints
         */
        private static function getAttachment($doc, $root, $item)
        {
@@ -905,7 +907,9 @@ class DFRN
         * @param bool   $single  If set, the entry is created as an XML document with a single "entry" element
         *
         * @return object XML entry object
-        * @todo Find proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        * @todo  Find proper type-hints
         */
        private static function entry($doc, $type, array $item, array $owner, $comment = false, $cid = 0, $single = false)
        {
@@ -1001,7 +1005,7 @@ class DFRN
                XML::addElement($doc, $entry, "updated", DateTimeFormat::utc($item["edited"] . "+00:00", DateTimeFormat::ATOM));
 
                // "dfrn:env" is used to read the content
-               XML::addElement($doc, $entry, "dfrn:env", base64url_encode($body, true));
+               XML::addElement($doc, $entry, "dfrn:env", Strings::base64UrlEncode($body, true));
 
                // The "content" field is not read by the receiver. We could remove it when the type is "text"
                // We keep it at the moment, maybe there is some old version that doesn't read "dfrn:env"
@@ -1096,7 +1100,7 @@ class DFRN
                }
 
                foreach ($mentioned as $mention) {
-                       $condition = ['uid' => $owner["uid"], 'nurl' => normalise_link($mention)];
+                       $condition = ['uid' => $owner["uid"], 'nurl' => Strings::normaliseLink($mention)];
                        $contact = DBA::selectFirst('contact', ['forum', 'prv'], $condition);
 
                        if (DBA::isResult($contact) && ($contact["forum"] || $contact["prv"])) {
@@ -1161,19 +1165,20 @@ class DFRN
         * @param string $atom     Content that will be transmitted
         * @param bool   $dissolve (to be documented)
         *
+        * @param bool   $legacy_transport
         * @return int Deliver status. Negative values mean an error.
-        * @todo Add array type-hint for $owner, $contact
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        * @todo  Add array type-hint for $owner, $contact
         */
        public static function deliver($owner, $contact, $atom, $dissolve = false, $legacy_transport = false)
        {
-               $a = get_app();
-
                // At first try the Diaspora transport layer
                if (!$dissolve && !$legacy_transport) {
-                       $ret = self::transmit($owner, $contact, $atom);
-                       if ($ret >= 200) {
-                               logger('Delivery via Diaspora transport layer was successful with status ' . $ret);
-                               return $ret;
+                       $curlResult = self::transmit($owner, $contact, $atom);
+                       if ($curlResult >= 200) {
+                               Logger::log('Delivery via Diaspora transport layer was successful with status ' . $curlResult);
+                               return $curlResult;
                        }
                }
 
@@ -1189,10 +1194,9 @@ class DFRN
                $rino = Config::get('system', 'rino_encrypt');
                $rino = intval($rino);
 
-               logger("Local rino version: ". $rino, LOGGER_DEBUG);
+               Logger::log("Local rino version: ". $rino, Logger::DEBUG);
 
                $ssl_val = intval(Config::get('system', 'ssl_policy'));
-               $ssl_policy = '';
 
                switch ($ssl_val) {
                        case SSL_POLICY_FULL:
@@ -1209,24 +1213,24 @@ class DFRN
 
                $url = $contact['notify'] . '&dfrn_id=' . $idtosend . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . (($rino) ? '&rino='.$rino : '');
 
-               logger('dfrn_deliver: ' . $url);
+               Logger::log('dfrn_deliver: ' . $url);
 
-               $ret = Network::curl($url);
+               $curlResult = Network::curl($url);
 
-               if (!empty($ret["errno"]) && ($ret['errno'] == CURLE_OPERATION_TIMEDOUT)) {
+               if ($curlResult->isTimeout()) {
                        Contact::markForArchival($contact);
                        return -2; // timed out
                }
 
-               $xml = $ret['body'];
+               $xml = $curlResult->getBody();
 
-               $curl_stat = $a->get_curl_code();
+               $curl_stat = $curlResult->getReturnCode();
                if (empty($curl_stat)) {
                        Contact::markForArchival($contact);
                        return -3; // timed out
                }
 
-               logger('dfrn_deliver: ' . $xml, LOGGER_DATA);
+               Logger::log('dfrn_deliver: ' . $xml, Logger::DATA);
 
                if (empty($xml)) {
                        Contact::markForArchival($contact);
@@ -1234,8 +1238,8 @@ class DFRN
                }
 
                if (strpos($xml, '<?xml') === false) {
-                       logger('dfrn_deliver: no valid XML returned');
-                       logger('dfrn_deliver: returned XML: ' . $xml, LOGGER_DATA);
+                       Logger::log('dfrn_deliver: no valid XML returned');
+                       Logger::log('dfrn_deliver: returned XML: ' . $xml, Logger::DATA);
                        Contact::markForArchival($contact);
                        return 3;
                }
@@ -1260,11 +1264,11 @@ class DFRN
                $perm         = (($res->perm) ? $res->perm : null);
                $dfrn_version = (float) (($res->dfrn_version) ? $res->dfrn_version : 2.0);
                $rino_remote_version = intval($res->rino);
-               $page         = (($owner['page-flags'] == Contact::PAGE_COMMUNITY) ? 1 : 0);
+               $page         = (($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? 1 : 0);
 
-               logger("Remote rino version: ".$rino_remote_version." for ".$contact["url"], LOGGER_DEBUG);
+               Logger::log("Remote rino version: ".$rino_remote_version." for ".$contact["url"], Logger::DEBUG);
 
-               if ($owner['page-flags'] == Contact::PAGE_PRVGROUP) {
+               if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
                        $page = 2;
                }
 
@@ -1281,7 +1285,7 @@ class DFRN
                }
 
                if (($contact['duplex'] && strlen($contact['pubkey']))
-                       || ($owner['page-flags'] == Contact::PAGE_COMMUNITY && strlen($contact['pubkey']))
+                       || ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY && strlen($contact['pubkey']))
                        || ($contact['rel'] == Contact::SHARING && strlen($contact['pubkey']))
                ) {
                        openssl_public_decrypt($sent_dfrn_id, $final_dfrn_id, $contact['pubkey']);
@@ -1298,7 +1302,7 @@ class DFRN
                }
 
                if ($final_dfrn_id != $orig_id) {
-                       logger('dfrn_deliver: wrong dfrn_id.');
+                       Logger::log('dfrn_deliver: wrong dfrn_id.');
                        // did not decode properly - cannot trust this site
                        Contact::markForArchival($contact);
                        return 3;
@@ -1310,7 +1314,7 @@ class DFRN
                        $postvars['dissolve'] = '1';
                }
 
-               if ((($contact['rel']) && ($contact['rel'] != Contact::SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == Contact::PAGE_COMMUNITY)) {
+               if ((($contact['rel']) && ($contact['rel'] != Contact::SHARING) && (! $contact['blocked'])) || ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY)) {
                        $postvars['data'] = $atom;
                        $postvars['perm'] = 'rw';
                } else {
@@ -1326,7 +1330,7 @@ class DFRN
 
 
                if ($rino > 0 && $rino_remote_version > 0 && (! $dissolve)) {
-                       logger('rino version: '. $rino_remote_version);
+                       Logger::log('rino version: '. $rino_remote_version);
 
                        switch ($rino_remote_version) {
                                case 1:
@@ -1335,7 +1339,7 @@ class DFRN
                                        break;
 
                                default:
-                                       logger("rino: invalid requested version '$rino_remote_version'");
+                                       Logger::log("rino: invalid requested version '$rino_remote_version'");
                                        Contact::markForArchival($contact);
                                        return -8;
                        }
@@ -1345,7 +1349,7 @@ class DFRN
 
                        if ($dfrn_version >= 2.1) {
                                if (($contact['duplex'] && strlen($contact['pubkey']))
-                                       || ($owner['page-flags'] == Contact::PAGE_COMMUNITY && strlen($contact['pubkey']))
+                                       || ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY && strlen($contact['pubkey']))
                                        || ($contact['rel'] == Contact::SHARING && strlen($contact['pubkey']))
                                ) {
                                        openssl_public_encrypt($key, $postvars['key'], $contact['pubkey']);
@@ -1353,39 +1357,41 @@ class DFRN
                                        openssl_private_encrypt($key, $postvars['key'], $contact['prvkey']);
                                }
                        } else {
-                               if (($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == Contact::PAGE_COMMUNITY)) {
+                               if (($contact['duplex'] && strlen($contact['prvkey'])) || ($owner['page-flags'] == User::PAGE_FLAGS_COMMUNITY)) {
                                        openssl_private_encrypt($key, $postvars['key'], $contact['prvkey']);
                                } else {
                                        openssl_public_encrypt($key, $postvars['key'], $contact['pubkey']);
                                }
                        }
 
-                       logger('md5 rawkey ' . md5($postvars['key']));
+                       Logger::log('md5 rawkey ' . md5($postvars['key']));
 
                        $postvars['key'] = bin2hex($postvars['key']);
                }
 
 
-               logger('dfrn_deliver: ' . "SENDING: " . print_r($postvars, true), LOGGER_DATA);
+               Logger::log('dfrn_deliver: ' . "SENDING: " . print_r($postvars, true), Logger::DATA);
+
+               $postResult = Network::post($contact['notify'], $postvars);
 
-               $xml = Network::post($contact['notify'], $postvars);
+               $xml = $postResult->getBody();
 
-               logger('dfrn_deliver: ' . "RECEIVED: " . $xml, LOGGER_DATA);
+               Logger::log('dfrn_deliver: ' . "RECEIVED: " . $xml, Logger::DATA);
 
-               $curl_stat = $a->get_curl_code();
+               $curl_stat = $postResult->getReturnCode();
                if (empty($curl_stat) || empty($xml)) {
                        Contact::markForArchival($contact);
                        return -9; // timed out
                }
 
-               if (($curl_stat == 503) && stristr($a->get_curl_headers(), 'retry-after')) {
+               if (($curl_stat == 503) && stristr($postResult->getHeader(), 'retry-after')) {
                        Contact::markForArchival($contact);
                        return -10;
                }
 
                if (strpos($xml, '<?xml') === false) {
-                       logger('dfrn_deliver: phase 2: no valid XML returned');
-                       logger('dfrn_deliver: phase 2: returned XML: ' . $xml, LOGGER_DATA);
+                       Logger::log('dfrn_deliver: phase 2: no valid XML returned');
+                       Logger::log('dfrn_deliver: phase 2: returned XML: ' . $xml, Logger::DATA);
                        Contact::markForArchival($contact);
                        return 3;
                }
@@ -1403,7 +1409,7 @@ class DFRN
                }
 
                if (!empty($res->message)) {
-                       logger('Delivery returned status '.$res->status.' - '.$res->message, LOGGER_DEBUG);
+                       Logger::log('Delivery returned status '.$res->status.' - '.$res->message, Logger::DEBUG);
                }
 
                if (($res->status >= 200) && ($res->status <= 299)) {
@@ -1416,26 +1422,27 @@ class DFRN
        /**
         * @brief Transmits atom content to the contacts via the Diaspora transport layer
         *
-        * @param array  $owner    Owner record
-        * @param array  $contact  Contact record of the receiver
-        * @param string $atom     Content that will be transmitted
+        * @param array  $owner   Owner record
+        * @param array  $contact Contact record of the receiver
+        * @param string $atom    Content that will be transmitted
         *
+        * @param bool   $public_batch
         * @return int Deliver status. Negative values mean an error.
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
         */
        public static function transmit($owner, $contact, $atom, $public_batch = false)
        {
-               $a = get_app();
-
                if (!$public_batch) {
                        if (empty($contact['addr'])) {
-                               logger('Empty contact handle for ' . $contact['id'] . ' - ' . $contact['url'] . ' - trying to update it.');
+                               Logger::log('Empty contact handle for ' . $contact['id'] . ' - ' . $contact['url'] . ' - trying to update it.');
                                if (Contact::updateFromProbe($contact['id'])) {
                                        $new_contact = DBA::selectFirst('contact', ['addr'], ['id' => $contact['id']]);
                                        $contact['addr'] = $new_contact['addr'];
                                }
 
                                if (empty($contact['addr'])) {
-                                       logger('Unable to find contact handle for ' . $contact['id'] . ' - ' . $contact['url']);
+                                       Logger::log('Unable to find contact handle for ' . $contact['id'] . ' - ' . $contact['url']);
                                        Contact::markForArchival($contact);
                                        return -21;
                                }
@@ -1443,7 +1450,7 @@ class DFRN
 
                        $fcontact = Diaspora::personByHandle($contact['addr']);
                        if (empty($fcontact)) {
-                               logger('Unable to find contact details for ' . $contact['id'] . ' - ' . $contact['addr']);
+                               Logger::log('Unable to find contact details for ' . $contact['id'] . ' - ' . $contact['addr']);
                                Contact::markForArchival($contact);
                                return -22;
                        }
@@ -1467,23 +1474,24 @@ class DFRN
 
                $content_type = ($public_batch ? "application/magic-envelope+xml" : "application/json");
 
-               $xml = Network::post($dest_url, $envelope, ["Content-Type: ".$content_type]);
+               $postResult = Network::post($dest_url, $envelope, ["Content-Type: ".$content_type]);
+               $xml = $postResult->getBody();
 
-               $curl_stat = $a->get_curl_code();
+               $curl_stat = $postResult->getReturnCode();
                if (empty($curl_stat) || empty($xml)) {
-                       logger('Empty answer from ' . $contact['id'] . ' - ' . $dest_url);
+                       Logger::log('Empty answer from ' . $contact['id'] . ' - ' . $dest_url);
                        Contact::markForArchival($contact);
                        return -9; // timed out
                }
 
-               if (($curl_stat == 503) && (stristr($a->get_curl_headers(), 'retry-after'))) {
+               if (($curl_stat == 503) && (stristr($postResult->getHeader(), 'retry-after'))) {
                        Contact::markForArchival($contact);
                        return -10;
                }
 
                if (strpos($xml, '<?xml') === false) {
-                       logger('No valid XML returned from ' . $contact['id'] . ' - ' . $dest_url);
-                       logger('Returned XML: ' . $xml, LOGGER_DATA);
+                       Logger::log('No valid XML returned from ' . $contact['id'] . ' - ' . $dest_url);
+                       Logger::log('Returned XML: ' . $xml, Logger::DATA);
                        Contact::markForArchival($contact);
                        return 3;
                }
@@ -1496,7 +1504,7 @@ class DFRN
                }
 
                if (!empty($res->message)) {
-                       logger('Transmit to ' . $dest_url . ' returned status '.$res->status.' - '.$res->message, LOGGER_DEBUG);
+                       Logger::log('Transmit to ' . $dest_url . ' returned status '.$res->status.' - '.$res->message, Logger::DEBUG);
                }
 
                if (($res->status >= 200) && ($res->status <= 299)) {
@@ -1506,43 +1514,6 @@ class DFRN
                return intval($res->status);
        }
 
-       /**
-        * @brief Add new birthday event for this person
-        *
-        * @param array  $contact  Contact record
-        * @param string $birthday Birthday of the contact
-        * @return void
-        * @todo Add array type-hint for $contact
-        */
-       private static function birthdayEvent($contact, $birthday)
-       {
-               // Check for duplicates
-               $condition = ['uid' => $contact['uid'], 'cid' => $contact['id'],
-                       'start' => DateTimeFormat::utc($birthday), 'type' => 'birthday'];
-               if (DBA::exists('event', $condition)) {
-                       return;
-               }
-
-               logger('updating birthday: ' . $birthday . ' for contact ' . $contact['id']);
-
-               $bdtext = L10n::t('%s\'s birthday', $contact['name']);
-               $bdtext2 = L10n::t('Happy Birthday %s', ' [url=' . $contact['url'] . ']' . $contact['name'] . '[/url]');
-
-               $r = q(
-                       "INSERT INTO `event` (`uid`,`cid`,`created`,`edited`,`start`,`finish`,`summary`,`desc`,`type`)
-                       VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s') ",
-                       intval($contact['uid']),
-                       intval($contact['id']),
-                       DBA::escape(DateTimeFormat::utcNow()),
-                       DBA::escape(DateTimeFormat::utcNow()),
-                       DBA::escape(DateTimeFormat::utc($birthday)),
-                       DBA::escape(DateTimeFormat::utc($birthday . ' + 1 day ')),
-                       DBA::escape($bdtext),
-                       DBA::escape($bdtext2),
-                       DBA::escape('birthday')
-               );
-       }
-
        /**
         * @brief Fetch the author data from head or entry items
         *
@@ -1554,7 +1525,9 @@ class DFRN
         * @param string $xml       optional, default empty
         *
         * @return array Relevant data of the author
-        * @todo Find good type-hints for all parameter
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        * @todo  Find good type-hints for all parameter
         */
        private static function fetchauthor($xpath, $context, $importer, $element, $onlyfetch, $xml = "")
        {
@@ -1565,7 +1538,7 @@ class DFRN
                $fields = ['id', 'uid', 'url', 'network', 'avatar-date', 'avatar', 'name-date', 'uri-date', 'addr',
                        'name', 'nick', 'about', 'location', 'keywords', 'xmpp', 'bdyear', 'bd', 'hidden', 'contact-type'];
                $condition = ["`uid` = ? AND `nurl` = ? AND `network` != ?",
-                       $importer["importer_uid"], normalise_link($author["link"]), Protocol::STATUSNET];
+                       $importer["importer_uid"], Strings::normaliseLink($author["link"]), Protocol::STATUSNET];
                $contact_old = DBA::selectFirst('contact', $fields, $condition);
 
                if (DBA::isResult($contact_old)) {
@@ -1573,7 +1546,7 @@ class DFRN
                        $author["network"] = $contact_old["network"];
                } else {
                        if (!$onlyfetch) {
-                               logger("Contact ".$author["link"]." wasn't found for user ".$importer["importer_uid"]." XML: ".$xml, LOGGER_DEBUG);
+                               Logger::log("Contact ".$author["link"]." wasn't found for user ".$importer["importer_uid"]." XML: ".$xml, Logger::DEBUG);
                        }
 
                        $author["contact-unknown"] = true;
@@ -1622,11 +1595,11 @@ class DFRN
                }
 
                if (empty($author['avatar'])) {
-                       logger('Empty author: ' . $xml);
+                       Logger::log('Empty author: ' . $xml);
                }
 
                if (DBA::isResult($contact_old) && !$onlyfetch) {
-                       logger("Check if contact details for contact " . $contact_old["id"] . " (" . $contact_old["nick"] . ") have to be updated.", LOGGER_DEBUG);
+                       Logger::log("Check if contact details for contact " . $contact_old["id"] . " (" . $contact_old["nick"] . ") have to be updated.", Logger::DEBUG);
 
                        $poco = ["url" => $contact_old["url"]];
 
@@ -1687,7 +1660,7 @@ class DFRN
                        // If the "hide" element is present then the profile isn't searchable.
                        $hide = intval(XML::getFirstNodeValue($xpath, $element . "/dfrn:hide/text()", $context) == "true");
 
-                       logger("Hidden status for contact " . $contact_old["url"] . ": " . $hide, LOGGER_DEBUG);
+                       Logger::log("Hidden status for contact " . $contact_old["url"] . ": " . $hide, Logger::DEBUG);
 
                        // If the contact isn't searchable then set the contact to "hidden".
                        // Problem: This can be manually overridden by the user.
@@ -1718,13 +1691,12 @@ class DFRN
                        // "poco:birthday" is the birthday in the format "yyyy-mm-dd"
                        $value = XML::getFirstNodeValue($xpath, $element . "/poco:birthday/text()", $context);
 
-                       if (!in_array($value, ["", "0000-00-00", "0001-01-01"])) {
+                       if (!in_array($value, ["", "0000-00-00", DBA::NULL_DATE])) {
                                $bdyear = date("Y");
-                               $value = str_replace("0000", $bdyear, $value);
+                               $value = str_replace(["0000", "0001"], $bdyear, $value);
 
                                if (strtotime($value) < time()) {
                                        $value = str_replace($bdyear, $bdyear + 1, $value);
-                                       $bdyear = $bdyear + 1;
                                }
 
                                $poco["bd"] = $value;
@@ -1733,7 +1705,7 @@ class DFRN
                        $contact = array_merge($contact_old, $poco);
 
                        if ($contact_old["bdyear"] != $contact["bdyear"]) {
-                               self::birthdayEvent($contact, $birthday);
+                               Event::createBirthday($contact, $birthday);
                        }
 
                        // Get all field names
@@ -1759,20 +1731,20 @@ class DFRN
                                $contact[$field] = DateTimeFormat::utc($contact[$field]);
 
                                if (strtotime($contact[$field]) > strtotime($contact_old[$field])) {
-                                       logger("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $contact_old[$field] . "'", LOGGER_DEBUG);
+                                       Logger::log("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $contact_old[$field] . "'", Logger::DEBUG);
                                        $update = true;
                                }
                        }
 
                        foreach ($fields as $field => $data) {
                                if ($contact[$field] != $contact_old[$field]) {
-                                       logger("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $contact_old[$field] . "'", LOGGER_DEBUG);
+                                       Logger::log("Difference for contact " . $contact["id"] . " in field '" . $field . "'. New value: '" . $contact[$field] . "', old value '" . $contact_old[$field] . "'", Logger::DEBUG);
                                        $update = true;
                                }
                        }
 
                        if ($update) {
-                               logger("Update contact data for contact " . $contact["id"] . " (" . $contact["nick"] . ")", LOGGER_DEBUG);
+                               Logger::log("Update contact data for contact " . $contact["id"] . " (" . $contact["nick"] . ")", Logger::DEBUG);
 
                                q(
                                        "UPDATE `contact` SET `name` = '%s', `nick` = '%s', `about` = '%s', `location` = '%s',
@@ -1875,11 +1847,12 @@ class DFRN
         * @param object $mail     mail elements
         * @param array  $importer Record of the importer user mixed with contact of the content
         * @return void
-        * @todo Find good type-hints for all parameter
+        * @throws \Exception
+        * @todo  Find good type-hints for all parameter
         */
        private static function processMail($xpath, $mail, $importer)
        {
-               logger("Processing mails");
+               Logger::log("Processing mails");
 
                /// @TODO Rewrite this to one statement
                $msg = [];
@@ -1910,6 +1883,7 @@ class DFRN
                        "to_email" => $importer["email"],
                        "uid" => $importer["importer_uid"],
                        "item" => $msg,
+                       "parent" => $msg["parent-uri"],
                        "source_name" => $msg["from-name"],
                        "source_link" => $importer["url"],
                        "source_photo" => $importer["thumb"],
@@ -1919,7 +1893,7 @@ class DFRN
 
                notification($notif_params);
 
-               logger("Mail is processed, notification was sent.");
+               Logger::log("Mail is processed, notification was sent.");
        }
 
        /**
@@ -1929,13 +1903,12 @@ class DFRN
         * @param object $suggestion suggestion elements
         * @param array  $importer   Record of the importer user mixed with contact of the content
         * @return boolean
-        * @todo Find good type-hints for all parameter
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  Find good type-hints for all parameter
         */
        private static function processSuggestion($xpath, $suggestion, $importer)
        {
-               $a = get_app();
-
-               logger("Processing suggestions");
+               Logger::log("Processing suggestions");
 
                /// @TODO Rewrite this to one statement
                $suggest = [];
@@ -1956,7 +1929,7 @@ class DFRN
                 *
                 * @see https://github.com/friendica/friendica/pull/3254#discussion_r107315246
                 */
-               $condition = ['name' => $suggest["name"], 'nurl' => normalise_link($suggest["url"]),
+               $condition = ['name' => $suggest["name"], 'nurl' => Strings::normaliseLink($suggest["url"]),
                        'uid' => $suggest["uid"]];
                if (DBA::exists('contact', $condition)) {
                        return false;
@@ -2001,14 +1974,14 @@ class DFRN
                 */
                if (!DBA::isResult($fcontact)) {
                        // Database record did not get created. Quietly give up.
-                       killme();
+                       exit();
                }
 
                $fid = $r[0]["id"];
 
-               $hash = random_string();
+               $hash = Strings::getRandomHex();
 
-               $r = q(
+               q(
                        "INSERT INTO `intro` (`uid`, `fid`, `contact-id`, `note`, `hash`, `datetime`, `blocked`)
                        VALUES(%d, %d, %d, '%s', '%s', '%s', %d)",
                        intval($suggest["uid"]),
@@ -2047,11 +2020,13 @@ class DFRN
         * @param object $relocation relocation elements
         * @param array  $importer   Record of the importer user mixed with contact of the content
         * @return boolean
-        * @todo Find good type-hints for all parameter
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        * @todo  Find good type-hints for all parameter
         */
        private static function processRelocation($xpath, $relocation, $importer)
        {
-               logger("Processing relocations");
+               Logger::log("Processing relocations");
 
                /// @TODO Rewrite this to one statement
                $relocate = [];
@@ -2086,7 +2061,7 @@ class DFRN
                );
 
                if (!DBA::isResult($r)) {
-                       logger("Query failed to execute, no result returned in " . __FUNCTION__);
+                       Logger::log("Query failed to execute, no result returned in " . __FUNCTION__);
                        return false;
                }
 
@@ -2096,24 +2071,24 @@ class DFRN
                $relocate["server_url"] = preg_replace("=(https?://)(.*)/profile/(.*)=ism", "$1$2", $relocate["url"]);
 
                $fields = ['name' => $relocate["name"], 'photo' => $relocate["avatar"],
-                       'url' => $relocate["url"], 'nurl' => normalise_link($relocate["url"]),
+                       'url' => $relocate["url"], 'nurl' => Strings::normaliseLink($relocate["url"]),
                        'addr' => $relocate["addr"], 'connect' => $relocate["addr"],
                        'notify' => $relocate["notify"], 'server_url' => $relocate["server_url"]];
-               DBA::update('gcontact', $fields, ['nurl' => normalise_link($old["url"])]);
+               DBA::update('gcontact', $fields, ['nurl' => Strings::normaliseLink($old["url"])]);
 
                // Update the contact table. We try to find every entry.
                $fields = ['name' => $relocate["name"], 'avatar' => $relocate["avatar"],
-                       'url' => $relocate["url"], 'nurl' => normalise_link($relocate["url"]),
+                       'url' => $relocate["url"], 'nurl' => Strings::normaliseLink($relocate["url"]),
                        'addr' => $relocate["addr"], 'request' => $relocate["request"],
                        'confirm' => $relocate["confirm"], 'notify' => $relocate["notify"],
                        'poll' => $relocate["poll"], 'site-pubkey' => $relocate["sitepubkey"]];
-               $condition = ["(`id` = ?) OR (`nurl` = ?)", $importer["id"], normalise_link($old["url"])];
+               $condition = ["(`id` = ?) OR (`nurl` = ?)", $importer["id"], Strings::normaliseLink($old["url"])];
 
                DBA::update('contact', $fields, $condition);
 
                Contact::updateAvatar($relocate["avatar"], $importer["importer_uid"], $importer["id"], true);
 
-               logger('Contacts are updated.');
+               Logger::log('Contacts are updated.');
 
                /// @TODO
                /// merge with current record, current contents have priority
@@ -2131,7 +2106,8 @@ class DFRN
         * @param array $importer  Record of the importer user mixed with contact of the content
         * @param int   $entrytype Is it a toplevel entry, a comment or a relayed comment?
         * @return mixed
-        * @todo set proper type-hints (array?)
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  set proper type-hints (array?)
         */
        private static function updateContent($current, $item, $importer, $entrytype)
        {
@@ -2162,17 +2138,18 @@ class DFRN
         * @param array $item     the new item record
         *
         * @return int Is it a toplevel entry, a comment or a relayed comment?
-        * @todo set proper type-hints (array?)
+        * @throws \Exception
+        * @todo  set proper type-hints (array?)
         */
        private static function getEntryType($importer, $item)
        {
                if ($item["parent-uri"] != $item["uri"]) {
                        $community = false;
 
-                       if ($importer["page-flags"] == Contact::PAGE_COMMUNITY || $importer["page-flags"] == Contact::PAGE_PRVGROUP) {
+                       if ($importer["page-flags"] == User::PAGE_FLAGS_COMMUNITY || $importer["page-flags"] == User::PAGE_FLAGS_PRVGROUP) {
                                $sql_extra = "";
                                $community = true;
-                               logger("possible community action");
+                               Logger::log("possible community action");
                        } else {
                                $sql_extra = " AND `contact`.`self` AND `item`.`wall` ";
                        }
@@ -2209,7 +2186,7 @@ class DFRN
                         */
                        if ($is_a_remote_action && $community && (!$r[0]["forum_mode"]) && (!$r[0]["wall"])) {
                                $is_a_remote_action = false;
-                               logger("not a community action");
+                               Logger::log("not a community action");
                        }
 
                        if ($is_a_remote_action) {
@@ -2229,7 +2206,8 @@ class DFRN
         * @param array $importer  Record of the importer user mixed with contact of the content
         * @param int   $posted_id The record number of item record that was just posted
         * @return void
-        * @todo set proper type-hints (array?)
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  set proper type-hints (array?)
         */
        private static function doPoke($item, $importer, $posted_id)
        {
@@ -2252,7 +2230,7 @@ class DFRN
                                }
                        }
 
-                       if ($Blink && link_compare($Blink, System::baseUrl() . "/profile/" . $importer["nickname"])) {
+                       if ($Blink && Strings::compareLink($Blink, System::baseUrl() . "/profile/" . $importer["nickname"])) {
                                $author = DBA::selectFirst('contact', ['name', 'thumb', 'url'], ['id' => $item['author-id']]);
 
                                $item['id'] = $posted_id;
@@ -2292,11 +2270,12 @@ class DFRN
         * @param bool  $is_like   Is the verb a "like"?
         *
         * @return bool Should the processing of the entries be continued?
-        * @todo set proper type-hints (array?)
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @todo  set proper type-hints (array?)
         */
        private static function processVerbs($entrytype, $importer, &$item, &$is_like)
        {
-               logger("Process verb ".$item["verb"]." and object-type ".$item["object-type"]." for entrytype ".$entrytype, LOGGER_DEBUG);
+               Logger::log("Process verb ".$item["verb"]." and object-type ".$item["object-type"]." for entrytype ".$entrytype, Logger::DEBUG);
 
                if (($entrytype == DFRN::TOP_LEVEL)) {
                        // The filling of the the "contact" variable is done for legcy reasons
@@ -2308,22 +2287,22 @@ class DFRN
                        // Big question: Do we need these functions? They were part of the "consume_feed" function.
                        // This function once was responsible for DFRN and OStatus.
                        if (activity_match($item["verb"], ACTIVITY_FOLLOW)) {
-                               logger("New follower");
+                               Logger::log("New follower");
                                Contact::addRelationship($importer, $contact, $item, $nickname);
                                return false;
                        }
                        if (activity_match($item["verb"], ACTIVITY_UNFOLLOW)) {
-                               logger("Lost follower");
+                               Logger::log("Lost follower");
                                Contact::removeFollower($importer, $contact, $item);
                                return false;
                        }
                        if (activity_match($item["verb"], ACTIVITY_REQ_FRIEND)) {
-                               logger("New friend request");
+                               Logger::log("New friend request");
                                Contact::addRelationship($importer, $contact, $item, $nickname, true);
                                return false;
                        }
                        if (activity_match($item["verb"], ACTIVITY_UNFRIEND)) {
-                               logger("Lost sharer");
+                               Logger::log("Lost sharer");
                                Contact::removeSharer($importer, $contact, $item);
                                return false;
                        }
@@ -2349,6 +2328,12 @@ class DFRN
                                if (Item::exists($condition)) {
                                        return false;
                                }
+
+                               // The owner of an activity must be the author
+                               $item["owner-name"] = $item["author-name"];
+                               $item["owner-link"] = $item["author-link"];
+                               $item["owner-avatar"] = $item["author-avatar"];
+                               $item["owner-id"] = $item["author-id"];
                        } else {
                                $is_like = false;
                        }
@@ -2361,7 +2346,7 @@ class DFRN
                                        $item_tag = Item::selectFirst(['id', 'tag'], ['uri' => $xt->id, 'uid' => $importer["importer_uid"]]);
 
                                        if (!DBA::isResult($item_tag)) {
-                                               logger("Query failed to execute, no result returned in " . __FUNCTION__);
+                                               Logger::log("Query failed to execute, no result returned in " . __FUNCTION__);
                                                return false;
                                        }
 
@@ -2409,8 +2394,6 @@ class DFRN
                                                $item["plink"] = $href;
                                                break;
                                        case "enclosure":
-                                               $enclosure = $href;
-
                                                if (!empty($item["attach"])) {
                                                        $item["attach"] .= ",";
                                                } else {
@@ -2433,11 +2416,13 @@ class DFRN
         * @param array  $importer Record of the importer user mixed with contact of the content
         * @param object $xml      xml
         * @return void
-        * @todo Add type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        * @todo  Add type-hints
         */
        private static function processEntry($header, $xpath, $entry, $importer, $xml)
        {
-               logger("Processing entries");
+               Logger::log("Processing entries");
 
                $item = $header;
 
@@ -2455,7 +2440,7 @@ class DFRN
                );
                // Is there an existing item?
                if (DBA::isResult($current) && !self::isEditedTimestampNewer($current, $item)) {
-                       logger("Item ".$item["uri"]." (".$item['edited'].") already existed.", LOGGER_DEBUG);
+                       Logger::log("Item ".$item["uri"]." (".$item['edited'].") already existed.", Logger::DEBUG);
                        return;
                }
 
@@ -2484,16 +2469,16 @@ class DFRN
                $item["body"] = XML::getFirstNodeValue($xpath, "dfrn:env/text()", $entry);
                $item["body"] = str_replace([' ',"\t","\r","\n"], ['','','',''], $item["body"]);
                // make sure nobody is trying to sneak some html tags by us
-               $item["body"] = notags(base64url_decode($item["body"]));
+               $item["body"] = Strings::escapeTags(Strings::base64UrlDecode($item["body"]));
 
                $item["body"] = BBCode::limitBodySize($item["body"]);
 
                /// @todo Do we really need this check for HTML elements? (It was copied from the old function)
                if ((strpos($item['body'], '<') !== false) && (strpos($item['body'], '>') !== false)) {
-                       $base_url = get_app()->get_baseurl();
-                       $item['body'] = reltoabs($item['body'], $base_url);
+                       $base_url = \get_app()->getBaseURL();
+                       $item['body'] = HTML::relToAbs($item['body'], $base_url);
 
-                       $item['body'] = html2bb_video($item['body']);
+                       $item['body'] = HTML::toBBCodeVideo($item['body']);
 
                        $item['body'] = OEmbed::HTML2BBCode($item['body']);
 
@@ -2538,7 +2523,7 @@ class DFRN
                $item["guid"] = XML::getFirstNodeValue($xpath, "dfrn:diaspora_guid/text()", $entry);
 
                // We store the data from "dfrn:diaspora_signature" in a different table, this is done in "Item::insert"
-               $dsprsig = unxmlify(XML::getFirstNodeValue($xpath, "dfrn:diaspora_signature/text()", $entry));
+               $dsprsig = XML::unescape(XML::getFirstNodeValue($xpath, "dfrn:diaspora_signature/text()", $entry));
                if ($dsprsig != "") {
                        $item["dsprsig"] = $dsprsig;
                }
@@ -2595,8 +2580,6 @@ class DFRN
                        }
                }
 
-               $enclosure = "";
-
                $links = $xpath->query("atom:link", $entry);
                if ($links) {
                        self::parseLinks($links, $item);
@@ -2663,10 +2646,10 @@ class DFRN
 
                        // Is it an event?
                        if (($item["object-type"] == ACTIVITY_OBJ_EVENT) && !$owner_unknown) {
-                               logger("Item ".$item["uri"]." seems to contain an event.", LOGGER_DEBUG);
+                               Logger::log("Item ".$item["uri"]." seems to contain an event.", Logger::DEBUG);
                                $ev = Event::fromBBCode($item["body"]);
-                               if ((x($ev, "desc") || x($ev, "summary")) && x($ev, "start")) {
-                                       logger("Event in item ".$item["uri"]." was found.", LOGGER_DEBUG);
+                               if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
+                                       Logger::log("Event in item ".$item["uri"]." was found.", Logger::DEBUG);
                                        $ev["cid"]     = $importer["id"];
                                        $ev["uid"]     = $importer["importer_uid"];
                                        $ev["uri"]     = $item["uri"];
@@ -2682,20 +2665,20 @@ class DFRN
                                        }
 
                                        $event_id = Event::store($ev);
-                                       logger("Event ".$event_id." was stored", LOGGER_DEBUG);
+                                       Logger::log("Event ".$event_id." was stored", Logger::DEBUG);
                                        return;
                                }
                        }
                }
 
                if (!self::processVerbs($entrytype, $importer, $item, $is_like)) {
-                       logger("Exiting because 'processVerbs' told us so", LOGGER_DEBUG);
+                       Logger::log("Exiting because 'processVerbs' told us so", Logger::DEBUG);
                        return;
                }
 
                // This check is done here to be able to receive connection requests in "processVerbs"
                if (($entrytype == DFRN::TOP_LEVEL) && $owner_unknown) {
-                       logger("Item won't be stored because user " . $importer["importer_uid"] . " doesn't follow " . $item["owner-link"] . ".", LOGGER_DEBUG);
+                       Logger::log("Item won't be stored because user " . $importer["importer_uid"] . " doesn't follow " . $item["owner-link"] . ".", Logger::DEBUG);
                        return;
                }
 
@@ -2703,19 +2686,17 @@ class DFRN
                // Update content if 'updated' changes
                if (DBA::isResult($current)) {
                        if (self::updateContent($current, $item, $importer, $entrytype)) {
-                               logger("Item ".$item["uri"]." was updated.", LOGGER_DEBUG);
+                               Logger::log("Item ".$item["uri"]." was updated.", Logger::DEBUG);
                        } else {
-                               logger("Item " . $item["uri"] . " already existed.", LOGGER_DEBUG);
+                               Logger::log("Item " . $item["uri"] . " already existed.", Logger::DEBUG);
                        }
                        return;
                }
 
                if (in_array($entrytype, [DFRN::REPLY, DFRN::REPLY_RC])) {
                        $posted_id = Item::insert($item);
-                       $parent = 0;
-
                        if ($posted_id) {
-                               logger("Reply from contact ".$item["contact-id"]." was stored with id ".$posted_id, LOGGER_DEBUG);
+                               Logger::log("Reply from contact ".$item["contact-id"]." was stored with id ".$posted_id, Logger::DEBUG);
 
                                if ($item['uid'] == 0) {
                                        Item::distribute($posted_id);
@@ -2725,23 +2706,23 @@ class DFRN
                        }
                } else { // $entrytype == DFRN::TOP_LEVEL
                        if (($importer["uid"] == 0) && ($importer["importer_uid"] != 0)) {
-                               logger("Contact ".$importer["id"]." isn't known to user ".$importer["importer_uid"].". The post will be ignored.", LOGGER_DEBUG);
+                               Logger::log("Contact ".$importer["id"]." isn't known to user ".$importer["importer_uid"].". The post will be ignored.", Logger::DEBUG);
                                return;
                        }
-                       if (!link_compare($item["owner-link"], $importer["url"])) {
+                       if (!Strings::compareLink($item["owner-link"], $importer["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::insert 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('Correcting item owner.', LOGGER_DEBUG);
+                               Logger::log('Correcting item owner.', Logger::DEBUG);
                                $item["owner-link"] = $importer["url"];
                                $item["owner-id"] = Contact::getIdForURL($importer["url"], 0);
                        }
 
                        if (($importer["rel"] == Contact::FOLLOWER) && (!self::tgroupCheck($importer["importer_uid"], $item))) {
-                               logger("Contact ".$importer["id"]." is only follower and tgroup check was negative.", LOGGER_DEBUG);
+                               Logger::log("Contact ".$importer["id"]." is only follower and tgroup check was negative.", Logger::DEBUG);
                                return;
                        }
 
@@ -2755,7 +2736,7 @@ class DFRN
                                $posted_id = $notify;
                        }
 
-                       logger("Item was stored with id ".$posted_id, LOGGER_DEBUG);
+                       Logger::log("Item was stored with id ".$posted_id, Logger::DEBUG);
 
                        if ($item['uid'] == 0) {
                                Item::distribute($posted_id);
@@ -2774,11 +2755,12 @@ class DFRN
         * @param object $deletion deletion elements
         * @param array  $importer Record of the importer user mixed with contact of the content
         * @return void
-        * @todo set proper type-hints
+        * @throws \Exception
+        * @todo  set proper type-hints
         */
        private static function processDeletion($xpath, $deletion, $importer)
        {
-               logger("Processing deletions");
+               Logger::log("Processing deletions");
                $uri = null;
 
                foreach ($deletion->attributes as $attributes) {
@@ -2794,18 +2776,18 @@ class DFRN
                $condition = ['uri' => $uri, 'uid' => $importer["importer_uid"]];
                $item = Item::selectFirst(['id', 'parent', 'contact-id', 'file', 'deleted'], $condition);
                if (!DBA::isResult($item)) {
-                       logger("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " wasn't found.", LOGGER_DEBUG);
+                       Logger::log("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " wasn't found.", Logger::DEBUG);
                        return;
                }
 
                if (strstr($item['file'], '[')) {
-                       logger("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " is filed. So it won't be deleted.", LOGGER_DEBUG);
+                       Logger::log("Item with uri " . $uri . " for user " . $importer["importer_uid"] . " is filed. So it won't be deleted.", Logger::DEBUG);
                        return;
                }
 
                // When it is a starting post it has to belong to the person that wants to delete it
                if (($item['id'] == $item['parent']) && ($item['contact-id'] != $importer["id"])) {
-                       logger("Item with uri " . $uri . " don't belong to contact " . $importer["id"] . " - ignoring deletion.", LOGGER_DEBUG);
+                       Logger::log("Item with uri " . $uri . " don't belong to contact " . $importer["id"] . " - ignoring deletion.", Logger::DEBUG);
                        return;
                }
 
@@ -2813,7 +2795,7 @@ class DFRN
                if (($item['id'] != $item['parent']) && ($item['contact-id'] != $importer["id"])) {
                        $condition = ['id' => $item['parent'], 'contact-id' => $importer["id"]];
                        if (!Item::exists($condition)) {
-                               logger("Item with uri " . $uri . " wasn't found or mustn't be deleted by contact " . $importer["id"] . " - ignoring deletion.", LOGGER_DEBUG);
+                               Logger::log("Item with uri " . $uri . " wasn't found or mustn't be deleted by contact " . $importer["id"] . " - ignoring deletion.", Logger::DEBUG);
                                return;
                        }
                }
@@ -2822,7 +2804,7 @@ class DFRN
                        return;
                }
 
-               logger('deleting item '.$item['id'].' uri='.$uri, LOGGER_DEBUG);
+               Logger::log('deleting item '.$item['id'].' uri='.$uri, Logger::DEBUG);
 
                Item::delete(['id' => $item['id']]);
        }
@@ -2834,7 +2816,9 @@ class DFRN
         * @param array  $importer     Record of the importer user mixed with contact of the content
         * @param bool   $sort_by_date Is used when feeds are polled
         * @return integer Import status
-        * @todo set proper type-hints
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        * @todo  set proper type-hints
         */
        public static function import($xml, $importer, $sort_by_date = false)
        {
@@ -2876,26 +2860,48 @@ class DFRN
                        self::fetchauthor($xpath, $doc->firstChild, $importer, "dfrn:owner", false, $xml);
                }
 
-               logger("Import DFRN message for user " . $importer["importer_uid"] . " from contact " . $importer["id"], LOGGER_DEBUG);
+               Logger::log("Import DFRN message for user " . $importer["importer_uid"] . " from contact " . $importer["id"], Logger::DEBUG);
 
                // is it a public forum? Private forums aren't exposed with this method
                $forum = intval(XML::getFirstNodeValue($xpath, "/atom:feed/dfrn:community/text()"));
 
                // The account type is new since 3.5.1
                if ($xpath->query("/atom:feed/dfrn:account_type")->length > 0) {
+                       // Hint: We are using separate update calls for uid=0 and uid!=0 since a combined call is bad for the database performance
+
                        $accounttype = intval(XML::getFirstNodeValue($xpath, "/atom:feed/dfrn:account_type/text()"));
 
                        if ($accounttype != $importer["contact-type"]) {
-                               DBA::update('contact', ['contact-type' => $accounttype], ['id' => $importer["id"]]);
+                               DBA::update('contact', ['contact-type' => $accounttype], ['id' => $importer['id']]);
+
+                               // Updating the public contact as well
+                               DBA::update('contact', ['contact-type' => $accounttype], ['uid' => 0, 'nurl' => $importer['nurl']]);
                        }
                        // A forum contact can either have set "forum" or "prv" - but not both
-                       if (($accounttype == Contact::ACCOUNT_TYPE_COMMUNITY) && (($forum != $importer["forum"]) || ($forum == $importer["prv"]))) {
-                               $condition = ['(`forum` != ? OR `prv` != ?) AND `id` = ?', $forum, !$forum, $importer["id"]];
+                       if ($accounttype == Contact::ACCOUNT_TYPE_COMMUNITY) {
+                               // It's a forum, so either set the public or private forum flag
+                               $condition = ['(`forum` != ? OR `prv` != ?) AND `id` = ?', $forum, !$forum, $importer['id']];
                                DBA::update('contact', ['forum' => $forum, 'prv' => !$forum], $condition);
+
+                               // Updating the public contact as well
+                               $condition = ['(`forum` != ? OR `prv` != ?) AND `uid` = 0 AND `nurl` = ?', $forum, !$forum, $importer['nurl']];
+                               DBA::update('contact', ['forum' => $forum, 'prv' => !$forum], $condition);
+                       } else {
+                               // It's not a forum, so remove the flags
+                               $condition = ['(`forum` OR `prv`) AND `id` = ?', $importer['id']];
+                               DBA::update('contact', ['forum' => false, 'prv' => false], $condition);
+
+                               // Updating the public contact as well
+                               $condition = ['(`forum` OR `prv`) AND `uid` = 0 AND `nurl` = ?', $importer['nurl']];
+                               DBA::update('contact', ['forum' => false, 'prv' => false], $condition);
                        }
                } elseif ($forum != $importer["forum"]) { // Deprecated since 3.5.1
                        $condition = ['`forum` != ? AND `id` = ?', $forum, $importer["id"]];
                        DBA::update('contact', ['forum' => $forum], $condition);
+
+                       // Updating the public contact as well
+                       $condition = ['`forum` != ? AND `uid` = 0 AND `nurl` = ?', $forum, $importer['nurl']];
+                       DBA::update('contact', ['forum' => $forum], $condition);
                }
 
 
@@ -2942,18 +2948,19 @@ class DFRN
                                self::processEntry($header, $xpath, $entry, $importer, $xml);
                        }
                }
-               logger("Import done for user " . $importer["importer_uid"] . " from contact " . $importer["id"], LOGGER_DEBUG);
+               Logger::log("Import done for user " . $importer["importer_uid"] . " from contact " . $importer["id"], Logger::DEBUG);
                return 200;
        }
 
        /**
         * @param App    $a            App
         * @param string $contact_nick contact nickname
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
         */
        public static function autoRedir(App $a, $contact_nick)
        {
                // prevent looping
-               if (x($_REQUEST, 'redir') && intval($_REQUEST['redir'])) {
+               if (!empty($_REQUEST['redir'])) {
                        return;
                }
 
@@ -2976,7 +2983,7 @@ class DFRN
                                return;
                        }
                        $baseurl = substr($baseurl, $domain_st + 3);
-                       $nurl = normalise_link($baseurl);
+                       $nurl = Strings::normaliseLink($baseurl);
 
                        /// @todo Why is there a query for "url" *and* "nurl"? Especially this normalising is strange.
                        $r = q("SELECT `id` FROM `contact` WHERE `uid` = (SELECT `uid` FROM `user` WHERE `nickname` = '%s' LIMIT 1)
@@ -3021,15 +3028,15 @@ class DFRN
                                return;
                        }
 
-                       $sec = random_string();
+                       $sec = Strings::getRandomHex();
 
                        DBA::insert('profile_check', ['uid' => local_user(), 'cid' => $cid, 'dfrn_id' => $dfrn_id, 'sec' => $sec, 'expire' => time() + 45]);
 
                        $url = curPageURL();
 
-                       logger('auto_redir: ' . $r[0]['name'] . ' ' . $sec, LOGGER_DEBUG);
+                       Logger::log('auto_redir: ' . $r[0]['name'] . ' ' . $sec, Logger::DEBUG);
                        $dest = (($url) ? '&destination_url=' . $url : '');
-                       goaway($r[0]['poll'] . '?dfrn_id=' . $dfrn_id
+                       System::externalRedirect($r[0]['poll'] . '?dfrn_id=' . $dfrn_id
                                . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&type=profile&sec=' . $sec . $dest);
                }
 
@@ -3066,23 +3073,23 @@ class DFRN
                        return false;
                }
 
-               $community_page = ($user['page-flags'] == Contact::PAGE_COMMUNITY);
-               $prvgroup = ($user['page-flags'] == Contact::PAGE_PRVGROUP);
+               $community_page = ($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY);
+               $prvgroup = ($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP);
 
-               $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
+               $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
 
                /*
                 * Diaspora uses their own hardwired link URL in @-tags
                 * instead of the one we supply with webfinger
                 */
-               $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
+               $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['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, $mtch[1])) {
+                               if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
                                        $mention = true;
-                                       logger('mention found: ' . $mtch[2]);
+                                       Logger::log('mention found: ' . $mtch[2]);
                                }
                        }
                }
@@ -3102,13 +3109,17 @@ class DFRN
         * item is assumed to be up-to-date.  If the timestamps are equal it
         * assumes the update has been seen before and should be ignored.
         *
+        * @param $existing
+        * @param $update
+        * @return bool
+        * @throws \Exception
         */
        private static function isEditedTimestampNewer($existing, $update)
        {
-               if (!x($existing, 'edited') || !$existing['edited']) {
+               if (empty($existing['edited'])) {
                        return true;
                }
-               if (!x($update, 'edited') || !$update['edited']) {
+               if (empty($update['edited'])) {
                        return false;
                }