src/Core/Protocol.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Core;
  23
  24 /**
  25  * Manage compatibility with federated networks
  26  */
  27 class Protocol
  28 {
  29         // Native support
  30         const ACTIVITYPUB = 'apub';    // ActivityPub (Pleroma, Mastodon, Osada, ...)
  31         const DFRN        = 'dfrn';    // Friendica, Mistpark, other DFRN implementations
  32         const DIASPORA    = 'dspr';    // Diaspora, Hubzilla, Socialhome, Ganggo
  33         const FEED        = 'feed';    // RSS/Atom feeds with no known "post/notify" protocol
  34         const MAIL        = 'mail';    // IMAP/POP
  35         const OSTATUS     = 'stat';    // GNU Social and other OStatus implementations
  36
  37         const NATIVE_SUPPORT = [self::DFRN, self::DIASPORA, self::OSTATUS, self::FEED, self::MAIL, self::ACTIVITYPUB];
  38
  39         const FEDERATED = [self::DFRN, self::DIASPORA, self::OSTATUS, self::ACTIVITYPUB];
  40
  41         const SUPPORT_PRIVATE = [self::DFRN, self::DIASPORA, self::MAIL, self::ACTIVITYPUB, self::PUMPIO];
  42
  43         // Supported through a connector
  44         const DIASPORA2 = 'dspc';    // Diaspora connector
  45         const LINKEDIN  = 'lnkd';    // LinkedIn
  46         const PUMPIO    = 'pump';    // pump.io
  47         const STATUSNET = 'stac';    // Statusnet connector
  48         const TWITTER   = 'twit';    // Twitter
  49         const DISCOURSE = 'dscs';    // Discourse
  50
  51         // Dead protocols
  52         const APPNET    = 'apdn';    // app.net - Dead protocol
  53         const FACEBOOK  = 'face';    // Facebook API - Not working anymore, API is closed
  54         const GPLUS     = 'goog';    // Google+ - Dead in 2019
  55
  56         // Currently unsupported
  57         const ICALENDAR = 'ical';    // iCalendar
  58         const MYSPACE   = 'mysp';    // MySpace
  59         const NEWS      = 'nntp';    // Network News Transfer Protocol
  60         const PNUT      = 'pnut';    // pnut.io
  61         const XMPP      = 'xmpp';    // XMPP
  62         const ZOT       = 'zot!';    // Zot!
  63
  64         const PHANTOM   = 'unkn';    // Place holder
  65
  66         /**
  67          * Returns the address string for the provided profile URL
  68          *
  69          * @param string $profile_url
  70          * @return string
  71          * @throws \Exception
  72          */
  73         public static function getAddrFromProfileUrl($profile_url)
  74         {
  75                 $network = self::matchByProfileUrl($profile_url, $matches);
  76
  77                 if ($network === self::PHANTOM) {
  78                         return "";
  79                 }
  80
  81                 $addr = $matches[2] . '@' . $matches[1];
  82
  83                 return $addr;
  84         }
  85
  86         /**
  87          * Guesses the network from a profile URL
  88          *
  89          * @param string $profile_url
  90          * @param array  $matches preg_match return array: [0] => Full match [1] => hostname [2] => username
  91          * @return string
  92          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  93          */
  94         public static function matchByProfileUrl($profile_url, &$matches = [])
  95         {
  96                 if (preg_match('=https?://(twitter\.com)/(.*)=ism', $profile_url, $matches)) {
  97                         return self::TWITTER;
  98                 }
  99
 100                 if (preg_match('=https?://(alpha\.app\.net)/(.*)=ism', $profile_url, $matches)) {
 101                         return self::APPNET;
 102                 }
 103
 104                 if (preg_match('=https?://(plus\.google\.com)/(.*)=ism', $profile_url, $matches)) {
 105                         return self::GPLUS;
 106                 }
 107
 108                 if (preg_match('=https?://(.*)/profile/(.*)=ism', $profile_url, $matches)) {
 109                         return self::DFRN;
 110                 }
 111
 112                 if (preg_match('=https?://(.*)/u/(.*)=ism', $profile_url, $matches)) {
 113                         return self::DIASPORA;
 114                 }
 115
 116                 if (preg_match('=https?://(.*)/channel/(.*)=ism', $profile_url, $matches)) {
 117                         // RedMatrix/Hubzilla is identified as Diaspora - friendica can't connect directly to it
 118                         return self::DIASPORA;
 119                 }
 120
 121                 if (preg_match('=https?://(.*)/user/(.*)=ism', $profile_url, $matches)) {
 122                         $statusnet_host = $matches[1];
 123                         $statusnet_user = $matches[2];
 124                         $UserData = DI::httpRequest()->fetchUrl('http://' . $statusnet_host . '/api/users/show.json?user_id=' . $statusnet_user);
 125                         $user = json_decode($UserData);
 126                         if ($user) {
 127                                 $matches[2] = $user->screen_name;
 128                                 return self::STATUSNET;
 129                         }
 130                 }
 131
 132                 // Mastodon, Pleroma
 133                 if (preg_match('=https?://(.+?)/users/(.+)=ism', $profile_url, $matches)
 134                         || preg_match('=https?://(.+?)/@(.+)=ism', $profile_url, $matches)
 135                 ) {
 136                         return self::ACTIVITYPUB;
 137                 }
 138
 139                 // pumpio (http://host.name/user)
 140                 if (preg_match('=https?://([\.\w]+)/([\.\w]+)$=ism', $profile_url, $matches)) {
 141                         return self::PUMPIO;
 142                 }
 143
 144                 return self::PHANTOM;
 145         }
 146
 147         /**
 148          * Returns a formatted mention from a profile URL and a display name
 149          *
 150          * @param string $profile_url
 151          * @param string $display_name
 152          * @return string
 153          * @throws \Exception
 154          */
 155         public static function formatMention($profile_url, $display_name)
 156         {
 157                 return $display_name . ' (' . self::getAddrFromProfileUrl($profile_url) . ')';
 158         }
 159 }