src/Module/RemoteFollow.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   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\Content\Widget;
  26 use Friendica\DI;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Search;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Contact;
  33 use Friendica\Model\Profile;
  34 use Friendica\Model\User;
  35 use Friendica\Network\HTTPException;
  36 use Friendica\Network\Probe;
  37
  38 /**
  39  * Remotely follow the account on this system by the provided account
  40  */
  41 class RemoteFollow extends BaseModule
  42 {
  43         static $owner;
  44
  45         public static function init(array $parameters = [])
  46         {
  47                 self::$owner = User::getOwnerDataByNick($parameters['profile']);
  48                 if (!self::$owner) {
  49                         throw new HTTPException\NotFoundException(DI::l10n()->t('User not found.'));
  50                 }
  51
  52                 DI::page()['aside'] = Widget\VCard::getHTML(self::$owner);
  53         }
  54
  55         public static function post(array $parameters = [])
  56         {
  57                 if (!empty($_POST['cancel']) || empty($_POST['dfrn_url'])) {
  58                         DI::baseUrl()->redirect();
  59                 }
  60
  61                 if (empty(self::$owner)) {
  62                         notice(DI::l10n()->t('Profile unavailable.'));
  63                         return;
  64                 }
  65
  66                 $url = Probe::cleanURI($_POST['dfrn_url']);
  67                 if (!strlen($url)) {
  68                         notice(DI::l10n()->t("Invalid locator"));
  69                         return;
  70                 }
  71
  72                 // Detect the network, make sure the provided URL is valid
  73                 $data = Contact::getByURL($url);
  74                 if (!$data) {
  75                         notice(DI::l10n()->t("The provided profile link doesn't seem to be valid"));
  76                         return;
  77                 }
  78
  79                 if (empty($data['subscribe'])) {
  80                         notice(DI::l10n()->t("Remote subscription can't be done for your network. Please subscribe directly on your system."));
  81                         return;
  82                 }
  83
  84                 Logger::notice('Remote request', ['url' => $url, 'follow' => self::$owner['url'], 'remote' => $data['subscribe']]);
  85
  86                 // Substitute our user's feed URL into $data['subscribe']
  87                 // Send the subscriber home to subscribe
  88                 // Diaspora needs the uri in the format user@domain.tld
  89                 if ($data['network'] == Protocol::DIASPORA) {
  90                         $uri = urlencode(self::$owner['addr']);
  91                 } else {
  92                         $uri = urlencode(self::$owner['url']);
  93                 }
  94
  95                 $follow_link = str_replace('{uri}', $uri, $data['subscribe']);
  96                 System::externalRedirect($follow_link);
  97         }
  98
  99         public static function content(array $parameters = [])
 100         {
 101                 if (empty(self::$owner)) {
 102                         return '';
 103                 }
 104
 105                 $target_addr = self::$owner['addr'];
 106                 $target_url = self::$owner['url'];
 107
 108                 $tpl = Renderer::getMarkupTemplate('auto_request.tpl');
 109                 $o = Renderer::replaceMacros($tpl, [
 110                         '$header'        => DI::l10n()->t('Friend/Connection Request'),
 111                         '$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, $target_url),
 112                         '$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'),
 113                         '$your_address'  => DI::l10n()->t('Your Webfinger address or profile URL:'),
 114                         '$pls_answer'    => DI::l10n()->t('Please answer the following:'),
 115                         '$submit'        => DI::l10n()->t('Submit Request'),
 116                         '$cancel'        => DI::l10n()->t('Cancel'),
 117
 118                         '$request'       => 'remote_follow/' . $parameters['profile'],
 119                         '$name'          => self::$owner['name'],
 120                         '$myaddr'        => Profile::getMyURL(),
 121                 ]);
 122                 return $o;
 123         }
 124 }