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Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Post attachment vault class.
  19   *
  20   * @package    mod_forum
  21   * @copyright  2018 Ryan Wyllie <ryan@moodle.com>
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace mod_forum\local\vaults;
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  use mod_forum\local\entities\post as post_entity;
  30  use context;
  31  use file_storage;
  32  
  33  /**
  34   * Post attachment vault class.
  35   *
  36   * This should be the only place that accessed the database.
  37   *
  38   * This uses the repository pattern. See:
  39   * https://designpatternsphp.readthedocs.io/en/latest/More/Repository/README.html
  40   *
  41   * @copyright  2018 Ryan Wyllie <ryan@moodle.com>
  42   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  43   */
  44  class post_attachment {
  45      /** The component for attachments */
  46      private const COMPONENT = 'mod_forum';
  47      /** Sort the attachments by filename */
  48      private const SORT = 'filename';
  49      /** Don't include directories */
  50      private const INCLUDE_DIRECTORIES = false;
  51      /** @var file_storage $filestorage File storage */
  52      private $filestorage;
  53  
  54      /**
  55       * Construct.
  56       *
  57       * @param file_storage $filestorage File storage
  58       */
  59      public function __construct(file_storage $filestorage) {
  60          $this->filestorage = $filestorage;
  61      }
  62  
  63      /**
  64       * Get the attachments for the given posts. The results are indexed by
  65       * post id.
  66       *
  67       * @param context $context The (forum) context that the posts are in
  68       * @param post_entity[] $posts The list of posts to load attachments for
  69       * @param string $area The file storage area, can be 'attachment' or 'post' for inline attachments.
  70       * @return array Post attachments indexed by post id
  71       */
  72      private function get_area_attachments_for_posts(context $context, array $posts, string $area) {
  73          $itemids = array_map(function($post) {
  74              return $post->get_id();
  75          }, $posts);
  76  
  77          $files = $this->filestorage->get_area_files(
  78              $context->id,
  79              self::COMPONENT,
  80              $area,
  81              $itemids,
  82              self::SORT,
  83              self::INCLUDE_DIRECTORIES
  84          );
  85  
  86          $filesbyid = array_reduce($posts, function($carry, $post) {
  87              $carry[$post->get_id()] = [];
  88              return $carry;
  89          }, []);
  90  
  91          return array_reduce($files, function($carry, $file) {
  92              $itemid = $file->get_itemid();
  93              $carry[$itemid] = array_merge($carry[$itemid], [$file]);
  94              return $carry;
  95          }, $filesbyid);
  96      }
  97  
  98      /**
  99       * Get attachment for posts.
 100       *
 101       * @param context $context The (forum) context that the posts are in
 102       * @param post_entity[] $posts The list of posts to load attachments for
 103       * @return array Post attachments indexed by post id
 104       */
 105      public function get_attachments_for_posts(context $context, array $posts) {
 106          return $this->get_area_attachments_for_posts($context, $posts, 'attachment');
 107      }
 108  
 109      /**
 110       * Get inline attachments for posts.
 111       *
 112       * @param context $context The (forum) context that the posts are in
 113       * @param post_entity[] $posts The list of posts to load attachments for
 114       * @return array Post attachments indexed by post id
 115       */
 116      public function get_inline_attachments_for_posts(context $context, array $posts) {
 117          return $this->get_area_attachments_for_posts($context, $posts, 'post');
 118      }
 119  
 120  }