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\App\BaseURL;
  25 use Friendica\App\Page;
  26 use Friendica\BaseModule;
  27 use Friendica\Content\Widget;
  28 use Friendica\Core\L10n;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Protocol;
  31 use Friendica\Core\Renderer;
  32 use Friendica\Core\Search;
  33 use Friendica\Core\System;
  34 use Friendica\Model\Contact;
  35 use Friendica\Model\Profile;
  36 use Friendica\Model\User;
  37 use Friendica\Network\HTTPException;
  38 use Friendica\Network\Probe;
  39
  40 /**
  41  * Remotely follow the account on this system by the provided account
  42  */
  43 class RemoteFollow extends BaseModule
  44 {
  45         /** @var array */
  46         protected $owner;
  47         /** @var Page */
  48         protected $page;
  49         /** @var BaseURL */
  50         protected $baseUrl;
  51
  52         public function __construct(L10n $l10n, Page $page, BaseURL $baseUrl, array $parameters = [])
  53         {
  54                 parent::__construct($l10n, $parameters);
  55
  56                 $this->owner = User::getOwnerDataByNick($this->parameters['profile']);
  57                 if (!$this->owner) {
  58                         throw new HTTPException\NotFoundException($this->t('User not found.'));
  59                 }
  60
  61                 $this->baseUrl = $baseUrl;
  62                 $this->page    = $page;
  63         }
  64
  65         public function post()
  66         {
  67                 if (!empty($_POST['cancel']) || empty($_POST['dfrn_url'])) {
  68                         $this->baseUrl->redirect();
  69                 }
  70
  71                 if (empty($this->owner)) {
  72                         notice($this->t('Profile unavailable.'));
  73                         return;
  74                 }
  75
  76                 $url = Probe::cleanURI($_POST['dfrn_url']);
  77                 if (!strlen($url)) {
  78                         notice($this->t("Invalid locator"));
  79                         return;
  80                 }
  81
  82                 // Detect the network, make sure the provided URL is valid
  83                 $data = Contact::getByURL($url);
  84                 if (!$data) {
  85                         notice($this->t("The provided profile link doesn't seem to be valid"));
  86                         return;
  87                 }
  88
  89                 if (empty($data['subscribe'])) {
  90                         notice($this->t("Remote subscription can't be done for your network. Please subscribe directly on your system."));
  91                         return;
  92                 }
  93
  94                 Logger::notice('Remote request', ['url' => $url, 'follow' => $this->owner['url'], 'remote' => $data['subscribe']]);
  95
  96                 // Substitute our user's feed URL into $data['subscribe']
  97                 // Send the subscriber home to subscribe
  98                 // Diaspora needs the uri in the format user@domain.tld
  99                 if ($data['network'] == Protocol::DIASPORA) {
 100                         $uri = urlencode($this->owner['addr']);
 101                 } else {
 102                         $uri = urlencode($this->owner['url']);
 103                 }
 104
 105                 $follow_link = str_replace('{uri}', $uri, $data['subscribe']);
 106                 System::externalRedirect($follow_link);
 107         }
 108
 109         public function content(): string
 110         {
 111                 if (empty($this->owner)) {
 112                         return '';
 113                 }
 114
 115                 $this->page['aside'] = Widget\VCard::getHTML($this->owner);
 116
 117                 $target_addr = $this->owner['addr'];
 118                 $target_url = $this->owner['url'];
 119
 120                 $tpl = Renderer::getMarkupTemplate('auto_request.tpl');
 121                 $o = Renderer::replaceMacros($tpl, [
 122                         '$header'        => $this->t('Friend/Connection Request'),
 123                         '$page_desc'     => $this->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, $target_url),
 124                         '$invite_desc'   => $this->t('If you are not yet a member of the free social web, <a href="%s">follow this link to find a public Friendica node and join us today</a>.', Search::getGlobalDirectory() . '/servers'),
 125                         '$your_address'  => $this->t('Your Webfinger address or profile URL:'),
 126                         '$pls_answer'    => $this->t('Please answer the following:'),
 127                         '$submit'        => $this->t('Submit Request'),
 128                         '$cancel'        => $this->t('Cancel'),
 129
 130                         '$request'       => 'remote_follow/' . $this->parameters['profile'],
 131                         '$name'          => $this->owner['name'],
 132                         '$myaddr'        => Profile::getMyURL(),
 133                 ]);
 134                 return $o;
 135         }
 136 }