]> git.mxchange.org Git - friendica.git/blobdiff - src/Model/Contact.php
Merge pull request #7250 from MrPetovan/bug/6410-normalize-message-button
[friendica.git] / src / Model / Contact.php
index 5f63d89d0f974243d6f2ea7de78212c8ce14e54e..01bbd23a6d415983e3269af3ea9eda3aea092a98 100644 (file)
@@ -22,6 +22,7 @@ use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\OStatus;
 use Friendica\Protocol\PortableContact;
 use Friendica\Protocol\Salmon;
+use Friendica\Util\BaseURL;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
 use Friendica\Util\Strings;
@@ -109,6 +110,45 @@ class Contact extends BaseObject
         * @}
         */
 
+       /**
+        * @param array $fields    Array of selected fields, empty for all
+        * @param array $condition Array of fields for condition
+        * @param array $params    Array of several parameters
+        * @return array
+        * @throws \Exception
+        */
+       public static function select(array $fields = [], array $condition = [], array $params = [])
+       {
+               $statement = DBA::select('contact', $fields, $condition, $params);
+
+               return DBA::toArray($statement);
+       }
+
+       /**
+        * @param array $fields    Array of selected fields, empty for all
+        * @param array $condition Array of fields for condition
+        * @param array $params    Array of several parameters
+        * @return array
+        * @throws \Exception
+        */
+       public static function selectFirst(array $fields = [], array $condition = [], array $params = [])
+       {
+               $contact = DBA::selectFirst('contact', $fields, $condition, $params);
+
+               return $contact;
+       }
+
+       /**
+        * @param integer $id     Contact ID
+        * @param array   $fields Array of selected fields, empty for all
+        * @return array|boolean Contact record if it exists, false otherwise
+        * @throws \Exception
+        */
+       public static function getById($id, $fields = [])
+       {
+               return DBA::selectFirst('contact', $fields, ['id' => $id]);
+       }
+
        /**
         * @brief Tests if the given contact is a follower
         *
@@ -212,6 +252,28 @@ class Contact extends BaseObject
                return ['public' => $pcid, 'user' => $ucid];
        }
 
+       /**
+        * Returns contact details for a given contact id in combination with a user id
+        *
+        * @param int $cid A contact ID
+        * @param int $uid The User ID
+        * @param array $fields The selected fields for the contact
+        *
+        * @return array The contact details
+        *
+        * @throws \Exception
+        */
+       public static function getContactForUser($cid, $uid, array $fields = [])
+       {
+               $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => $uid]);
+
+               if (!DBA::isResult($contact)) {
+                       return [];
+               } else {
+                       return $contact;
+               }
+       }
+
        /**
         * @brief Block contact id for user id
         *
@@ -232,6 +294,11 @@ class Contact extends BaseObject
                }
 
                DBA::update('user-contact', ['blocked' => $blocked], ['cid' => $cdata['public'], 'uid' => $uid], true);
+
+               if ($blocked) {
+                       // Blocked contact can't be in any group
+                       self::removeFromGroups($cid);
+               }
        }
 
        /**
@@ -584,7 +651,10 @@ class Contact extends BaseObject
                }
 
                if ($update) {
-                       $fields['name-date'] = DateTimeFormat::utcNow();
+                       if ($fields['name'] != $self['name']) {
+                               $fields['name-date'] = DateTimeFormat::utcNow();
+                       }
+                       $fields['updated'] = DateTimeFormat::utcNow();
                        DBA::update('contact', $fields, ['id' => $self['id']]);
 
                        // Update the public contact as well
@@ -634,9 +704,15 @@ class Contact extends BaseObject
                if (empty($contact['network'])) {
                        return;
                }
-               if (($contact['network'] == Protocol::DFRN) && $dissolve) {
+
+               $protocol = $contact['network'];
+               if (($protocol == Protocol::DFRN) && !self::isLegacyDFRNContact($contact)) {
+                       $protocol = Protocol::ACTIVITYPUB;
+               }
+
+               if (($protocol == Protocol::DFRN) && $dissolve) {
                        DFRN::deliver($user, $contact, 'placeholder', true);
-               } elseif (in_array($contact['network'], [Protocol::OSTATUS, Protocol::DFRN])) {
+               } elseif (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
                        // create an unfollow slap
                        $item = [];
                        $item['verb'] = NAMESPACE_OSTATUS . "/unfollow";
@@ -651,9 +727,9 @@ class Contact extends BaseObject
                        if (!empty($contact['notify'])) {
                                Salmon::slapper($user, $contact['notify'], $slap);
                        }
-               } elseif ($contact['network'] == Protocol::DIASPORA) {
+               } elseif ($protocol == Protocol::DIASPORA) {
                        Diaspora::sendUnshare($user, $contact);
-               } elseif ($contact['network'] == Protocol::ACTIVITYPUB) {
+               } elseif ($protocol == Protocol::ACTIVITYPUB) {
                        ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
 
                        if ($dissolve) {
@@ -832,7 +908,7 @@ class Contact extends BaseObject
                        // If there is more than one entry we filter out the connector networks
                        if (count($r) > 1) {
                                foreach ($r as $id => $result) {
-                                       if ($result["network"] == Protocol::STATUSNET) {
+                                       if (!in_array($result["network"], Protocol::NATIVE_SUPPORT)) {
                                                unset($r[$id]);
                                        }
                                }
@@ -1001,7 +1077,7 @@ class Contact extends BaseObject
                $sparkle = false;
                if (($contact['network'] === Protocol::DFRN) && !$contact['self']) {
                        $sparkle = true;
-                       $profile_link = System::baseUrl() . '/redir/' . $contact['id'];
+                       $profile_link = System::baseUrl() . '/redir/' . $contact['id'] . '?url=' . $contact['url'];
                } else {
                        $profile_link = $contact['url'];
                }
@@ -1011,12 +1087,12 @@ class Contact extends BaseObject
                }
 
                if ($sparkle) {
-                       $status_link = $profile_link . '?url=status';
-                       $photos_link = $profile_link . '?url=photos';
-                       $profile_link = $profile_link . '?url=profile';
+                       $status_link = $profile_link . '?tab=status';
+                       $photos_link = str_replace('/profile/', '/photos/', $profile_link);
+                       $profile_link = $profile_link . '?tab=profile';
                }
 
-               if (in_array($contact['network'], [Protocol::DFRN, Protocol::DIASPORA]) && !$contact['self']) {
+               if (self::canReceivePrivateMessages($contact)) {
                        $pm_url = System::baseUrl() . '/message/new/' . $contact['id'];
                }
 
@@ -1099,6 +1175,90 @@ class Contact extends BaseObject
                           )", intval($uid), intval($uid));
        }
 
+       /**
+        * Have a look at all contact tables for a given profile url.
+        * This function works as a replacement for probing the contact.
+        *
+        * @param string  $url Contact URL
+        * @param integer $cid Contact ID
+        *
+        * @return array Contact array in the "probe" structure
+       */
+       private static function getProbeDataFromDatabase($url, $cid = null)
+       {
+               // The link could be provided as http although we stored it as https
+               $ssl_url = str_replace('http://', 'https://', $url);
+
+               $fields = ['id', 'uid', 'url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
+                       'photo', 'keywords', 'location', 'about', 'network',
+                       'priority', 'batch', 'request', 'confirm', 'poco'];
+
+               if (!empty($cid)) {
+                       $data = DBA::selectFirst('contact', $fields, ['id' => $cid]);
+                       if (DBA::isResult($data)) {
+                               return $data;
+                       }
+               }
+
+               $data = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url)]);
+
+               if (!DBA::isResult($data)) {
+                       $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
+                       $data = DBA::selectFirst('contact', $fields, $condition);
+               }
+
+               if (DBA::isResult($data)) {
+                       // For security reasons we don't fetch key data from our users
+                       $data["pubkey"] = '';
+                       return $data;
+               }
+
+               $fields = ['url', 'addr', 'alias', 'notify', 'name', 'nick',
+                       'photo', 'keywords', 'location', 'about', 'network'];
+               $data = DBA::selectFirst('gcontact', $fields, ['nurl' => Strings::normaliseLink($url)]);
+
+               if (!DBA::isResult($data)) {
+                       $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
+                       $data = DBA::selectFirst('contact', $fields, $condition);
+               }
+
+               if (DBA::isResult($data)) {
+                       $data["pubkey"] = '';
+                       $data["poll"] = '';
+                       $data["priority"] = 0;
+                       $data["batch"] = '';
+                       $data["request"] = '';
+                       $data["confirm"] = '';
+                       $data["poco"] = '';
+                       return $data;
+               }
+
+               $data = ActivityPub::probeProfile($url, false);
+               if (!empty($data)) {
+                       return $data;
+               }
+
+               $fields = ['url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
+                       'photo', 'network', 'priority', 'batch', 'request', 'confirm'];
+               $data = DBA::selectFirst('fcontact', $fields, ['url' => $url]);
+
+               if (!DBA::isResult($data)) {
+                       $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
+                       $data = DBA::selectFirst('contact', $fields, $condition);
+               }
+
+               if (DBA::isResult($data)) {
+                       $data["pubkey"] = '';
+                       $data["keywords"] = '';
+                       $data["location"] = '';
+                       $data["about"] = '';
+                       $data["poco"] = '';
+                       return $data;
+               }
+
+               return [];
+       }
+
        /**
         * @brief Fetch the contact id for a given URL and user
         *
@@ -1139,11 +1299,11 @@ class Contact extends BaseObject
 
                /// @todo Verify if we can't use Contact::getDetailsByUrl instead of the following
                // We first try the nurl (http://server.tld/nick), most common case
-               $contact = DBA::selectFirst('contact', ['id', 'avatar', 'avatar-date'], ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false]);
+               $contact = DBA::selectFirst('contact', ['id', 'avatar', 'updated', 'network'], ['nurl' => Strings::normaliseLink($url), 'uid' => $uid, 'deleted' => false]);
 
                // Then the addr (nick@server.tld)
                if (!DBA::isResult($contact)) {
-                       $contact = DBA::selectFirst('contact', ['id', 'avatar', 'avatar-date'], ['addr' => $url, 'uid' => $uid, 'deleted' => false]);
+                       $contact = DBA::selectFirst('contact', ['id', 'avatar', 'updated', 'network'], ['addr' => $url, 'uid' => $uid, 'deleted' => false]);
                }
 
                // Then the alias (which could be anything)
@@ -1151,19 +1311,25 @@ class Contact extends BaseObject
                        // The link could be provided as http although we stored it as https
                        $ssl_url = str_replace('http://', 'https://', $url);
                        $condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, $uid];
-                       $contact = DBA::selectFirst('contact', ['id', 'avatar', 'avatar-date'], $condition);
+                       $contact = DBA::selectFirst('contact', ['id', 'avatar', 'updated', 'network'], $condition);
                }
 
                if (DBA::isResult($contact)) {
                        $contact_id = $contact["id"];
 
                        // Update the contact every 7 days
-                       $update_contact = ($contact['avatar-date'] < DateTimeFormat::utc('now -7 days'));
+                       $update_contact = ($contact['updated'] < DateTimeFormat::utc('now -7 days'));
 
                        // We force the update if the avatar is empty
                        if (empty($contact['avatar'])) {
                                $update_contact = true;
                        }
+
+                       // Update the contact in the background if needed but it is called by the frontend
+                       if ($update_contact && $no_update && in_array($contact['network'], Protocol::NATIVE_SUPPORT)) {
+                               Worker::add(PRIORITY_LOW, "UpdateContact", $contact_id);
+                       }
+
                        if (!$update_contact || $no_update) {
                                return $contact_id;
                        }
@@ -1172,19 +1338,13 @@ class Contact extends BaseObject
                        return 0;
                }
 
-               // When we don't want to update, we look if some of our users already know this contact
-               if ($no_update) {
-                       $fields = ['url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
-                               'photo', 'keywords', 'location', 'about', 'network',
-                               'priority', 'batch', 'request', 'confirm', 'poco'];
-                       $data = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url)]);
-
-                       if (DBA::isResult($data)) {
-                               // For security reasons we don't fetch key data from our users
-                               $data["pubkey"] = '';
-                       }
+               // When we don't want to update, we look if we know this contact in any way
+               if ($no_update && empty($default)) {
+                       $data = self::getProbeDataFromDatabase($url, $contact_id);
+                       $background_update = true;
                } else {
                        $data = [];
+                       $background_update = false;
                }
 
                if (empty($data)) {
@@ -1202,47 +1362,19 @@ class Contact extends BaseObject
                                return 0;
                        }
 
-                       // Get data from the gcontact table
-                       $fields = ['name', 'nick', 'url', 'photo', 'addr', 'alias', 'network'];
-                       $contact = DBA::selectFirst('gcontact', $fields, ['nurl' => Strings::normaliseLink($url)]);
-                       if (!DBA::isResult($contact)) {
-                               $contact = DBA::selectFirst('contact', $fields, ['nurl' => Strings::normaliseLink($url)]);
-                       }
-
-                       if (!DBA::isResult($contact)) {
-                               $fields = ['url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
-                                       'photo', 'keywords', 'location', 'about', 'network',
-                                       'priority', 'batch', 'request', 'confirm', 'poco'];
-                               $contact = DBA::selectFirst('contact', $fields, ['addr' => $url]);
-                       }
-
-                       // The link could be provided as http although we stored it as https
-                       $ssl_url = str_replace('http://', 'https://', $url);
-
-                       if (!DBA::isResult($contact)) {
-                               $condition = ['alias' => [$url, Strings::normaliseLink($url), $ssl_url]];
-                               $contact = DBA::selectFirst('contact', $fields, $condition);
-                       }
-
-                       if (!DBA::isResult($contact)) {
-                               $fields = ['url', 'addr', 'alias', 'notify', 'poll', 'name', 'nick',
-                                       'photo', 'network', 'priority', 'batch', 'request', 'confirm'];
-                               $condition = ['url' => [$url, Strings::normaliseLink($url), $ssl_url]];
-                               $contact = DBA::selectFirst('fcontact', $fields, $condition);
+                       $contact = array_merge(self::getProbeDataFromDatabase($url, $contact_id), $default);
+                       if (empty($contact)) {
+                               return 0;
                        }
 
-                       if (!empty($default)) {
-                               $contact = $default;
-                       }
+                       $data = array_merge($data, $contact);
+               }
 
-                       if (!DBA::isResult($contact)) {
-                               return 0;
-                       } else {
-                               $data = array_merge($data, $contact);
-                       }
+               if (empty($data)) {
+                       return 0;
                }
 
-               if (!$contact_id && ($data["alias"] != '') && ($data["alias"] != $url) && !$in_loop) {
+               if (!$contact_id && !empty($data['alias']) && ($data['alias'] != $url) && !$in_loop) {
                        $contact_id = self::getIdForURL($data["alias"], $uid, true, $default, true);
                }
 
@@ -1250,26 +1382,26 @@ class Contact extends BaseObject
                        $fields = [
                                'uid'       => $uid,
                                'created'   => DateTimeFormat::utcNow(),
-                               'url'       => $data["url"],
-                               'nurl'      => Strings::normaliseLink($data["url"]),
-                               'addr'      => $data["addr"],
-                               'alias'     => $data["alias"],
-                               'notify'    => $data["notify"],
-                               'poll'      => $data["poll"],
-                               'name'      => $data["name"],
-                               'nick'      => $data["nick"],
-                               'photo'     => $data["photo"],
-                               'keywords'  => $data["keywords"],
-                               'location'  => $data["location"],
-                               'about'     => $data["about"],
-                               'network'   => $data["network"],
-                               'pubkey'    => $data["pubkey"],
+                               'url'       => $data['url'],
+                               'nurl'      => Strings::normaliseLink($data['url']),
+                               'addr'      => defaults($data, 'addr', ''),
+                               'alias'     => defaults($data, 'alias', ''),
+                               'notify'    => defaults($data, 'notify', ''),
+                               'poll'      => defaults($data, 'poll', ''),
+                               'name'      => defaults($data, 'name', ''),
+                               'nick'      => defaults($data, 'nick', ''),
+                               'photo'     => defaults($data, 'photo', ''),
+                               'keywords'  => defaults($data, 'keywords', ''),
+                               'location'  => defaults($data, 'location', ''),
+                               'about'     => defaults($data, 'about', ''),
+                               'network'   => $data['network'],
+                               'pubkey'    => defaults($data, 'pubkey', ''),
                                'rel'       => self::SHARING,
-                               'priority'  => $data["priority"],
-                               'batch'     => $data["batch"],
-                               'request'   => $data["request"],
-                               'confirm'   => $data["confirm"],
-                               'poco'      => $data["poco"],
+                               'priority'  => defaults($data, 'priority', 0),
+                               'batch'     => defaults($data, 'batch', ''),
+                               'request'   => defaults($data, 'request', ''),
+                               'confirm'   => defaults($data, 'confirm', ''),
+                               'poco'      => defaults($data, 'poco', ''),
                                'name-date' => DateTimeFormat::utcNow(),
                                'uri-date'  => DateTimeFormat::utcNow(),
                                'avatar-date' => DateTimeFormat::utcNow(),
@@ -1290,17 +1422,22 @@ class Contact extends BaseObject
 
                        $contact_id = $contacts[0]["id"];
 
+                       // Update in the background when we fetched the data solely from the database
+                       if ($background_update) {
+                               Worker::add(PRIORITY_LOW, "UpdateContact", $contact_id);
+                       }
+
                        // Update the newly created contact from data in the gcontact table
                        $gcontact = DBA::selectFirst('gcontact', ['location', 'about', 'keywords', 'gender'], ['nurl' => Strings::normaliseLink($data["url"])]);
                        if (DBA::isResult($gcontact)) {
                                // Only use the information when the probing hadn't fetched these values
-                               if ($data['keywords'] != '') {
+                               if (!empty($data['keywords'])) {
                                        unset($gcontact['keywords']);
                                }
-                               if ($data['location'] != '') {
+                               if (!empty($data['location'])) {
                                        unset($gcontact['location']);
                                }
-                               if ($data['about'] != '') {
+                               if (!empty($data['about'])) {
                                        unset($gcontact['about']);
                                }
                                DBA::update('contact', $gcontact, ['id' => $contact_id]);
@@ -1314,7 +1451,9 @@ class Contact extends BaseObject
                        }
                }
 
-               self::updateAvatar($data["photo"], $uid, $contact_id);
+               if (!empty($data['photo'])) {
+                       self::updateAvatar($data['photo'], $uid, $contact_id);
+               }
 
                $fields = ['url', 'nurl', 'addr', 'alias', 'name', 'nick', 'keywords', 'location', 'about', 'avatar-date', 'pubkey'];
                $contact = DBA::selectFirst('contact', $fields, ['id' => $contact_id]);
@@ -1325,36 +1464,36 @@ class Contact extends BaseObject
                }
 
                $updated = ['addr' => $data['addr'],
-                       'alias' => $data['alias'],
+                       'alias' => defaults($data, 'alias', ''),
                        'url' => $data['url'],
                        'nurl' => Strings::normaliseLink($data['url']),
                        'name' => $data['name'],
                        'nick' => $data['nick']];
 
-               if ($data['keywords'] != '') {
+               if (!empty($data['keywords'])) {
                        $updated['keywords'] = $data['keywords'];
                }
-               if ($data['location'] != '') {
+               if (!empty($data['location'])) {
                        $updated['location'] = $data['location'];
                }
 
                // Update the technical stuff as well - if filled
-               if ($data['notify'] != '') {
+               if (!empty($data['notify'])) {
                        $updated['notify'] = $data['notify'];
                }
-               if ($data['poll'] != '') {
+               if (!empty($data['poll'])) {
                        $updated['poll'] = $data['poll'];
                }
-               if ($data['batch'] != '') {
+               if (!empty($data['batch'])) {
                        $updated['batch'] = $data['batch'];
                }
-               if ($data['request'] != '') {
+               if (!empty($data['request'])) {
                        $updated['request'] = $data['request'];
                }
-               if ($data['confirm'] != '') {
+               if (!empty($data['confirm'])) {
                        $updated['confirm'] = $data['confirm'];
                }
-               if ($data['poco'] != '') {
+               if (!empty($data['poco'])) {
                        $updated['poco'] = $data['poco'];
                }
 
@@ -1363,14 +1502,14 @@ class Contact extends BaseObject
                        $updated['pubkey'] = $data['pubkey'];
                }
 
-               if (($data["addr"] != $contact["addr"]) || ($data["alias"] != $contact["alias"])) {
+               if (($data['addr'] != $contact['addr']) || (!empty($data['alias']) && ($data['alias'] != $contact['alias']))) {
                        $updated['uri-date'] = DateTimeFormat::utcNow();
                }
                if (($data["name"] != $contact["name"]) || ($data["nick"] != $contact["nick"])) {
                        $updated['name-date'] = DateTimeFormat::utcNow();
                }
 
-               $updated['avatar-date'] = DateTimeFormat::utcNow();
+               $updated['updated'] = DateTimeFormat::utcNow();
 
                DBA::update('contact', $updated, ['id' => $contact_id], $contact);
 
@@ -1545,13 +1684,13 @@ class Contact extends BaseObject
        /**
         * @brief Blocks a contact
         *
-        * @param int $uid
+        * @param int $cid
         * @return bool
         * @throws \Exception
         */
-       public static function block($uid)
+       public static function block($cid, $reason = null)
        {
-               $return = DBA::update('contact', ['blocked' => true], ['id' => $uid]);
+               $return = DBA::update('contact', ['blocked' => true, 'block_reason' => $reason], ['id' => $cid]);
 
                return $return;
        }
@@ -1559,13 +1698,13 @@ class Contact extends BaseObject
        /**
         * @brief Unblocks a contact
         *
-        * @param int $uid
+        * @param int $cid
         * @return bool
         * @throws \Exception
         */
-       public static function unblock($uid)
+       public static function unblock($cid)
        {
-               $return = DBA::update('contact', ['blocked' => false], ['id' => $uid]);
+               $return = DBA::update('contact', ['blocked' => false, 'block_reason' => null], ['id' => $cid]);
 
                return $return;
        }
@@ -1619,27 +1758,39 @@ class Contact extends BaseObject
        /**
         * @param integer $id      contact id
         * @param string  $network Optional network we are probing for
+        * @param boolean $force   Optional forcing of network probing (otherwise we use the cached data)
         * @return boolean
         * @throws \Friendica\Network\HTTPException\InternalServerErrorException
         * @throws \ImagickException
         */
-       public static function updateFromProbe($id, $network = '')
+       public static function updateFromProbe($id, $network = '', $force = false)
        {
                /*
                  Warning: Never ever fetch the public key via Probe::uri and write it into the contacts.
                  This will reliably kill your communication with Friendica contacts.
                 */
 
-               $fields = ['url', 'nurl', 'addr', 'alias', 'batch', 'notify', 'poll', 'poco', 'network'];
+               $fields = ['avatar', 'uid', 'name', 'nick', 'url', 'addr', 'batch', 'notify',
+                       'poll', 'request', 'confirm', 'poco', 'network', 'alias'];
                $contact = DBA::selectFirst('contact', $fields, ['id' => $id]);
                if (!DBA::isResult($contact)) {
                        return false;
                }
 
-               $ret = Probe::uri($contact["url"], $network);
+               $uid = $contact['uid'];
+               unset($contact['uid']);
+
+               $contact['photo'] = $contact['avatar'];
+               unset($contact['avatar']);
+
+               $ret = Probe::uri($contact['url'], $network, $uid, !$force);
 
                // If Probe::uri fails the network code will be different (mostly "feed" or "unkn")
-               if (($ret["network"] != $contact["network"]) && !in_array($ret["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, $network])) {
+               if (in_array($ret['network'], [Protocol::FEED, Protocol::PHANTOM]) && ($ret['network'] != $contact['network'])) {
+                       return false;
+               }
+
+               if (!in_array($ret['network'], Protocol::NATIVE_SUPPORT)) {
                        return false;
                }
 
@@ -1647,11 +1798,11 @@ class Contact extends BaseObject
 
                // make sure to not overwrite existing values with blank entries
                foreach ($ret as $key => $val) {
-                       if (isset($contact[$key]) && ($contact[$key] != "") && ($val == "")) {
+                       if (!isset($contact[$key])) {
+                               unset($ret[$key]);
+                       } elseif (($contact[$key] != '') && ($val == '')) {
                                $ret[$key] = $contact[$key];
-                       }
-
-                       if (isset($contact[$key]) && ($ret[$key] != $contact[$key])) {
+                       } elseif ($ret[$key] != $contact[$key]) {
                                $update = true;
                        }
                }
@@ -1660,20 +1811,13 @@ class Contact extends BaseObject
                        return true;
                }
 
-               DBA::update(
-                       'contact', [
-                               'url'     => $ret['url'],
-                               'nurl'    => Strings::normaliseLink($ret['url']),
-                               'network' => $ret['network'],
-                               'addr'    => $ret['addr'],
-                               'alias'   => $ret['alias'],
-                               'batch'   => $ret['batch'],
-                               'notify'  => $ret['notify'],
-                               'poll'    => $ret['poll'],
-                               'poco'    => $ret['poco']
-                       ],
-                       ['id' => $id]
-               );
+               $ret['nurl'] = Strings::normaliseLink($ret['url']);
+               $ret['updated'] = DateTimeFormat::utcNow();
+
+               self::updateAvatar($ret['photo'], $uid, $id, true);
+
+               unset($ret['photo']);
+               DBA::update('contact', $ret, ['id' => $id]);
 
                // Update the corresponding gcontact entry
                PortableContact::lastUpdated($ret["url"]);
@@ -1681,6 +1825,40 @@ class Contact extends BaseObject
                return true;
        }
 
+       /**
+        * Detects if a given contact array belongs to a legacy DFRN connection
+        *
+        * @param array $contact
+        * @return boolean
+        */
+       public static function isLegacyDFRNContact($contact)
+       {
+               // Newer Friendica contacts are connected via AP, then these fields aren't set
+               return !empty($contact['dfrn-id']) || !empty($contact['issued-id']);
+       }
+
+       /**
+        * Detects the communication protocol for a given contact url.
+        * This is used to detect Friendica contacts that we can communicate via AP.
+        *
+        * @param string $url contact url
+        * @param string $network Network of that contact
+        * @return string with protocol
+        */
+       public static function getProtocol($url, $network)
+       {
+               if ($network != Protocol::DFRN) {
+                       return $network;
+               }
+
+               $apcontact = APContact::getByURL($url);
+               if (!empty($apcontact) && !empty($apcontact['generator'])) {
+                       return Protocol::ACTIVITYPUB;
+               } else {
+                       return $network;
+               }
+       }
+
        /**
         * Takes a $uid and a url/handle and adds a new contact
         * Currently if the contact is DFRN, interactive needs to be true, to redirect to the
@@ -1756,7 +1934,9 @@ class Contact extends BaseObject
                        $contact = DBA::selectFirst('contact', ['id', 'rel'], $condition);
                }
 
-               if (($ret['network'] === Protocol::DFRN) && !DBA::isResult($contact)) {
+               $protocol = self::getProtocol($url, $ret['network']);
+
+               if (($protocol === Protocol::DFRN) && !DBA::isResult($contact)) {
                        if ($interactive) {
                                if (strlen($a->getURLPath())) {
                                        $myaddr = bin2hex(System::baseUrl() . '/profile/' . $a->user['nickname']);
@@ -1775,7 +1955,7 @@ class Contact extends BaseObject
                }
 
                // This extra param just confuses things, remove it
-               if ($ret['network'] === Protocol::DIASPORA) {
+               if ($protocol === Protocol::DIASPORA) {
                        $ret['url'] = str_replace('?absolute=true', '', $ret['url']);
                }
 
@@ -1798,7 +1978,7 @@ class Contact extends BaseObject
                        return $result;
                }
 
-               if ($ret['network'] === Protocol::OSTATUS && Config::get('system', 'ostatus_disabled')) {
+               if ($protocol === Protocol::OSTATUS && Config::get('system', 'ostatus_disabled')) {
                        $result['message'] .= L10n::t('The profile address specified belongs to a network which has been disabled on this site.') . EOL;
                        $ret['notify'] = '';
                }
@@ -1807,15 +1987,15 @@ class Contact extends BaseObject
                        $result['message'] .= L10n::t('Limited profile. This person will be unable to receive direct/personal notifications from you.') . EOL;
                }
 
-               $writeable = ((($ret['network'] === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
+               $writeable = ((($protocol === Protocol::OSTATUS) && ($ret['notify'])) ? 1 : 0);
 
-               $subhub = (($ret['network'] === Protocol::OSTATUS) ? true : false);
+               $subhub = (($protocol === Protocol::OSTATUS) ? true : false);
 
-               $hidden = (($ret['network'] === Protocol::MAIL) ? 1 : 0);
+               $hidden = (($protocol === Protocol::MAIL) ? 1 : 0);
 
-               $pending = in_array($ret['network'], [Protocol::ACTIVITYPUB]);
+               $pending = in_array($protocol, [Protocol::ACTIVITYPUB]);
 
-               if (in_array($ret['network'], [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
+               if (in_array($protocol, [Protocol::MAIL, Protocol::DIASPORA, Protocol::ACTIVITYPUB])) {
                        $writeable = 1;
                }
 
@@ -1826,7 +2006,7 @@ class Contact extends BaseObject
                        $fields = ['rel' => $new_relation, 'subhub' => $subhub, 'readonly' => false];
                        DBA::update('contact', $fields, ['id' => $contact['id']]);
                } else {
-                       $new_relation = (in_array($ret['network'], [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
+                       $new_relation = (in_array($protocol, [Protocol::MAIL]) ? self::FRIEND : self::SHARING);
 
                        // create contact record
                        DBA::insert('contact', [
@@ -1843,6 +2023,7 @@ class Contact extends BaseObject
                                'name'    => $ret['name'],
                                'nick'    => $ret['nick'],
                                'network' => $ret['network'],
+                               'protocol' => $protocol,
                                'pubkey'  => $ret['pubkey'],
                                'rel'     => $new_relation,
                                'priority'=> $ret['priority'],
@@ -1876,7 +2057,7 @@ class Contact extends BaseObject
                $owner = User::getOwnerDataById($uid);
 
                if (DBA::isResult($owner)) {
-                       if (in_array($contact['network'], [Protocol::OSTATUS, Protocol::DFRN])) {
+                       if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
                                // create a follow slap
                                $item = [];
                                $item['verb'] = ACTIVITY_FOLLOW;
@@ -1892,10 +2073,10 @@ class Contact extends BaseObject
                                if (!empty($contact['notify'])) {
                                        Salmon::slapper($owner, $contact['notify'], $slap);
                                }
-                       } elseif ($contact['network'] == Protocol::DIASPORA) {
+                       } elseif ($protocol == Protocol::DIASPORA) {
                                $ret = Diaspora::sendShare($a->user, $contact);
                                Logger::log('share returns: ' . $ret);
-                       } elseif ($contact['network'] == Protocol::ACTIVITYPUB) {
+                       } elseif ($protocol == Protocol::ACTIVITYPUB) {
                                $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact_id);
                                if (empty($activity_id)) {
                                        // This really should never happen
@@ -1923,7 +2104,7 @@ class Contact extends BaseObject
        public static function updateSslPolicy(array $contact, $new_policy)
        {
                $ssl_changed = false;
-               if ((intval($new_policy) == SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
+               if ((intval($new_policy) == BaseURL::SSL_POLICY_SELFSIGN || $new_policy === 'self') && strstr($contact['url'], 'https:')) {
                        $ssl_changed = true;
                        $contact['url']     =   str_replace('https:', 'http:', $contact['url']);
                        $contact['request'] =   str_replace('https:', 'http:', $contact['request']);
@@ -1933,7 +2114,7 @@ class Contact extends BaseObject
                        $contact['poco']    =   str_replace('https:', 'http:', $contact['poco']);
                }
 
-               if ((intval($new_policy) == SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
+               if ((intval($new_policy) == BaseURL::SSL_POLICY_FULL || $new_policy === 'full') && strstr($contact['url'], 'http:')) {
                        $ssl_changed = true;
                        $contact['url']     =   str_replace('http:', 'https:', $contact['url']);
                        $contact['request'] =   str_replace('http:', 'https:', $contact['request']);
@@ -1953,17 +2134,33 @@ class Contact extends BaseObject
                return $contact;
        }
 
-       public static function addRelationship($importer, $contact, $datarray, $item = '', $sharing = false) {
+       /**
+        * @param array  $importer Owner (local user) data
+        * @param array  $contact  Existing owner-specific contact data we want to expand the relationship with. Optional.
+        * @param array  $datarray An item-like array with at least the 'author-id' and 'author-url' keys for the contact. Mandatory.
+        * @param bool   $sharing  True: Contact is now sharing with Owner; False: Contact is now following Owner (default)
+        * @param string $note     Introduction additional message
+        * @return bool|null True: follow request is accepted; False: relationship is rejected; Null: relationship is pending
+        * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+        * @throws \ImagickException
+        */
+       public static function addRelationship(array $importer, array $contact, array $datarray, $sharing = false, $note = '')
+       {
                // Should always be set
                if (empty($datarray['author-id'])) {
-                       return;
+                       return false;
                }
 
-               $fields = ['url', 'name', 'nick', 'photo', 'network'];
+               $fields = ['url', 'name', 'nick', 'photo', 'network', 'blocked'];
                $pub_contact = DBA::selectFirst('contact', $fields, ['id' => $datarray['author-id']]);
                if (!DBA::isResult($pub_contact)) {
                        // Should never happen
-                       return;
+                       return false;
+               }
+
+               // Contact is blocked at node-level
+               if (self::isBlocked($datarray['author-id'])) {
+                       return false;
                }
 
                $url = defaults($datarray, 'author-link', $pub_contact['url']);
@@ -1972,37 +2169,46 @@ class Contact extends BaseObject
                $nick = $pub_contact['nick'];
                $network = $pub_contact['network'];
 
-               if (is_array($contact)) {
+               if (!empty($contact)) {
+            // Contact is blocked at user-level
+                   if (!empty($contact['id']) && !empty($importer['id']) &&
+                       self::isBlockedByUser($contact['id'], $importer['id'])) {
+                       return false;
+            }
+
+                       // Make sure that the existing contact isn't archived
+                       self::unmarkForArchival($contact);
+
                        if (($contact['rel'] == self::SHARING)
                                || ($sharing && $contact['rel'] == self::FOLLOWER)) {
-                               DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true],
+                               DBA::update('contact', ['rel' => self::FRIEND, 'writable' => true, 'pending' => false],
                                                ['id' => $contact['id'], 'uid' => $importer['uid']]);
                        }
 
-                       if ($contact['network'] == Protocol::ACTIVITYPUB) {
-                               ActivityPub\Transmitter::sendContactAccept($contact['url'], $contact['hub-verify'], $importer['uid']);
-                       }
-
-                       // send email notification to owner?
+                       return true;
                } else {
+                       // send email notification to owner?
                        if (DBA::exists('contact', ['nurl' => Strings::normaliseLink($url), 'uid' => $importer['uid'], 'pending' => true])) {
                                Logger::log('ignoring duplicated connection request from pending contact ' . $url);
-                               return;
+                               return null;
                        }
+
                        // create contact record
-                       q("INSERT INTO `contact` (`uid`, `created`, `url`, `nurl`, `name`, `nick`, `photo`, `network`, `rel`,
-                               `blocked`, `readonly`, `pending`, `writable`)
-                               VALUES (%d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 1, 1)",
-                               intval($importer['uid']),
-                               DBA::escape(DateTimeFormat::utcNow()),
-                               DBA::escape($url),
-                               DBA::escape(Strings::normaliseLink($url)),
-                               DBA::escape($name),
-                               DBA::escape($nick),
-                               DBA::escape($photo),
-                               DBA::escape($network),
-                               intval(self::FOLLOWER)
-                       );
+                       DBA::insert('contact', [
+                               'uid'      => $importer['uid'],
+                               'created'  => DateTimeFormat::utcNow(),
+                               'url'      => $url,
+                               'nurl'     => Strings::normaliseLink($url),
+                               'name'     => $name,
+                               'nick'     => $nick,
+                               'photo'    => $photo,
+                               'network'  => $network,
+                               'rel'      => self::FOLLOWER,
+                               'blocked'  => 0,
+                               'readonly' => 0,
+                               'pending'  => 1,
+                               'writable' => 1,
+                       ]);
 
                        $contact_record = [
                                'id' => DBA::lastInsertId(),
@@ -2023,7 +2229,7 @@ class Contact extends BaseObject
 
                                if (is_array($contact_record)) {
                                        DBA::insert('intro', ['uid' => $importer['uid'], 'contact-id' => $contact_record['id'],
-                                                               'blocked' => false, 'knowyou' => false,
+                                                               'blocked' => false, 'knowyou' => false, 'note' => $note,
                                                                'hash' => $hash, 'datetime' => DateTimeFormat::utcNow()]);
                                }
 
@@ -2046,19 +2252,16 @@ class Contact extends BaseObject
                                                'verb'         => ($sharing ? ACTIVITY_FRIEND : ACTIVITY_FOLLOW),
                                                'otype'        => 'intro'
                                        ]);
-
                                }
                        } elseif (DBA::isResult($user) && in_array($user['page-flags'], [User::PAGE_FLAGS_SOAPBOX, User::PAGE_FLAGS_FREELOVE, User::PAGE_FLAGS_COMMUNITY])) {
                                $condition = ['uid' => $importer['uid'], 'url' => $url, 'pending' => true];
                                DBA::update('contact', ['pending' => false], $condition);
 
-                               $contact = DBA::selectFirst('contact', ['url', 'network', 'hub-verify'], ['id' => $contact_record['id']]);
-
-                               if ($contact['network'] == Protocol::ACTIVITYPUB) {
-                                       ActivityPub\Transmitter::sendContactAccept($contact['url'], $contact['hub-verify'], $importer['uid']);
-                               }
+                               return true;
                        }
                }
+
+               return null;
        }
 
        public static function removeFollower($importer, $contact, array $datarray = [], $item = "")
@@ -2162,12 +2365,15 @@ class Contact extends BaseObject
                        return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
                }
 
-               $cid = self::getIdForURL($contact_url, 0, true);
-               if (empty($cid)) {
+               $data = self::getProbeDataFromDatabase($contact_url);
+               if (empty($data)) {
                        return $url ?: $contact_url; // Equivalent to: ($url != '') ? $url : $contact_url;
                }
 
-               return self::magicLinkbyId($cid, $url);
+               // Prevents endless loop in case only a non-public contact exists for the contact URL
+               unset($data['uid']);
+
+               return self::magicLinkByContact($data, $contact_url);
        }
 
        /**
@@ -2208,10 +2414,14 @@ class Contact extends BaseObject
                        return $url;
                }
 
-               if ($contact['uid'] != 0) {
+               if (!empty($contact['uid'])) {
                        return self::magicLink($contact['url'], $url);
                }
 
+               if (empty($contact['id'])) {
+                       return $url ?: $contact['url'];
+               }
+
                $redirect = 'redir/' . $contact['id'];
 
                if ($url != '') {
@@ -2220,4 +2430,50 @@ class Contact extends BaseObject
 
                return $redirect;
        }
+
+       /**
+        * Remove a contact from all groups
+        *
+        * @param integer $contact_id
+        *
+        * @return boolean Success
+        */
+       public static function removeFromGroups($contact_id)
+       {
+               return DBA::delete('group_member', ['contact-id' => $contact_id]);
+       }
+
+       /**
+        * Is the contact a forum?
+        *
+        * @param integer $contactid ID of the contact
+        *
+        * @return boolean "true" if it is a forum
+        */
+       public static function isForum($contactid)
+       {
+               $fields = ['forum', 'prv'];
+               $condition = ['id' => $contactid];
+               $contact = DBA::selectFirst('contact', $fields, $condition);
+               if (!DBA::isResult($contact)) {
+                       return false;
+               }
+
+               // Is it a forum?
+               return ($contact['forum'] || $contact['prv']);
+       }
+
+       /**
+        * Can the remote contact receive private messages?
+        *
+        * @param array $contact
+        * @return bool
+        */
+       public static function canReceivePrivateMessages(array $contact)
+       {
+               $protocol = $contact['network'] ?? $contact['protocol'] ?? Protocol::PHANTOM;
+               $self = $contact['self'] ?? false;
+
+               return in_array($protocol, [Protocol::DFRN, Protocol::DIASPORA, Protocol::ACTIVITYPUB]) && !$self;
+       }
 }