src/Module/RemoteFollow.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\Module;
  23
  24 use Friendica\BaseModule;
  25 use Friendica\DI;
  26 use Friendica\Core\Logger;
  27 use Friendica\Core\Protocol;
  28 use Friendica\Core\Renderer;
  29 use Friendica\Core\Search;
  30 use Friendica\Core\System;
  31 use Friendica\Model\Profile;
  32 use Friendica\Network\Probe;
  33
  34 /**
  35  * Remotely follow the account on this system by the provided account
  36  */
  37 class RemoteFollow extends BaseModule
  38 {
  39         public static function init(array $parameters = [])
  40         {
  41                 Profile::load(DI::app(), $parameters['profile']);
  42         }
  43
  44         public static function post(array $parameters = [])
  45         {
  46                 $a = DI::app();
  47
  48                 if (!empty($_POST['cancel']) || empty($_POST['dfrn_url'])) {
  49                         DI::baseUrl()->redirect();
  50                 }
  51
  52                 if (empty($a->profile['uid'])) {
  53                         notice(DI::l10n()->t('Profile unavailable.'));
  54                         return;
  55                 }
  56
  57                 $url = trim($_POST['dfrn_url']);
  58                 if (!strlen($url)) {
  59                         notice(DI::l10n()->t("Invalid locator"));
  60                         return;
  61                 }
  62
  63                 // Detect the network, make sure the provided URL is valid
  64                 $data = Probe::uri($url);
  65                 if ($data['network'] == Protocol::PHANTOM) {
  66                         notice(DI::l10n()->t("The provided profile link doesn't seem to be valid"));
  67                         return;
  68                 }
  69
  70                 // Fetch link for the "remote follow" functionality of the given profile
  71                 $follow_link_template = Probe::getRemoteFollowLink($url);
  72
  73                 if (empty($follow_link_template)) {
  74                         notice(DI::l10n()->t("Remote subscription can't be done for your network. Please subscribe directly on your system."));
  75                         return;
  76                 }
  77
  78                 Logger::notice('Remote request', ['url' => $url, 'follow' => $a->profile['url'], 'remote' => $follow_link_template]);
  79
  80                 // Substitute our user's feed URL into $follow_link_template
  81                 // Send the subscriber home to subscribe
  82                 // Diaspora needs the uri in the format user@domain.tld
  83                 if ($data['network'] == Protocol::DIASPORA) {
  84                         $uri = urlencode($a->profile['addr']);
  85                 } else {
  86                         $uri = urlencode($a->profile['url']);
  87                 }
  88
  89                 $follow_link = str_replace('{uri}', $uri, $follow_link_template);
  90                 System::externalRedirect($follow_link);
  91         }
  92
  93         public static function content(array $parameters = [])
  94         {
  95                 $a = DI::app();
  96
  97                 if (empty($a->profile)) {
  98                         return '';
  99                 }
 100
 101                 $target_addr = $a->profile['addr'];
 102                 $target_url = $a->profile['url'];
 103
 104                 $tpl = Renderer::getMarkupTemplate('auto_request.tpl');
 105                 $o = Renderer::replaceMacros($tpl, [
 106                         '$header'        => DI::l10n()->t('Friend/Connection Request'),
 107                         '$page_desc'     => DI::l10n()->t('Enter your Webfinger address (user@domain.tld) or profile URL here. If this isn\'t supported by your system, you have to subscribe to <strong>%s</strong> or <strong>%s</strong> directly on your system.', $target_addr, $target_url),
 108                         '$invite_desc'   => DI::l10n()->t('If you are not yet a member of the free social web, <a href="%s">follow this link to find a public Friendica node and join us today</a>.', Search::getGlobalDirectory() . '/servers'),
 109                         '$your_address'  => DI::l10n()->t('Your Webfinger address or profile URL:'),
 110                         '$pls_answer'    => DI::l10n()->t('Please answer the following:'),
 111                         '$submit'        => DI::l10n()->t('Submit Request'),
 112                         '$cancel'        => DI::l10n()->t('Cancel'),
 113
 114                         '$request'       => 'remote_follow/' . $parameters['profile'],
 115                         '$name'          => $a->profile['name'],
 116                         '$myaddr'        => Profile::getMyURL(),
 117                 ]);
 118                 return $o;
 119         }
 120 }