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Differences Between: [Versions 310 and 403] [Versions 311 and 403] [Versions 39 and 403] [Versions 400 and 403] [Versions 401 and 403]

   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   * Provide interface for blocks AJAX actions
  19   *
  20   * @copyright  2011 Lancaster University Network Services Limited
  21   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  22   * @package core
  23   */
  24  
  25  define('AJAX_SCRIPT', true);
  26  require_once(__DIR__ . '/../../config.php');
  27  
  28  // Initialise ALL common incoming parameters here, up front.
  29  $pagehash = required_param('pagehash', PARAM_RAW);
  30  $action = optional_param('action', '', PARAM_ALPHA);
  31  // Params for blocks-move actions.
  32  $buimoveid = optional_param('bui_moveid', 0, PARAM_INT);
  33  $buinewregion = optional_param('bui_newregion', '', PARAM_ALPHAEXT);
  34  $buibeforeid = optional_param('bui_beforeid', 0, PARAM_INT);
  35  
  36  $PAGE->set_url('/lib/ajax/blocks.php', ['pagehash' => $pagehash]);
  37  
  38  // Retrieve the edited page from the session hash.
  39  $page = moodle_page::retrieve_edited_page($pagehash, MUST_EXIST);
  40  
  41  // Verifying login and session.
  42  $cm = null;
  43  if (!is_null($page->cm)) {
  44      $cm = get_coursemodule_from_id(null, $page->cm->id, $page->course->id, false, MUST_EXIST);
  45  }
  46  require_login($page->course, false, $cm);
  47  require_sesskey();
  48  $PAGE->set_context($page->context);
  49  
  50  if (!$page->user_can_edit_blocks() || !$page->user_is_editing()) {
  51      throw new moodle_exception('nopermissions', '', $page->url->out(), get_string('editblock'));
  52  }
  53  
  54  // Send headers.
  55  echo $OUTPUT->header();
  56  
  57  switch ($action) {
  58      case 'move':
  59          // Loading blocks and instances for the region.
  60          $page->blocks->load_blocks();
  61          $instances = $page->blocks->get_blocks_for_region($buinewregion);
  62  
  63          $buinewweight = null;
  64          if ($buibeforeid == 0) {
  65              if (count($instances) === 0) {
  66                  // Moving the block into an empty region. Give it the default weight.
  67                  $buinewweight = 0;
  68              } else {
  69                  // Moving to very bottom.
  70                  $last = end($instances);
  71                  $buinewweight = $last->instance->weight + 1;
  72              }
  73          } else {
  74              // Moving somewhere.
  75              $lastweight = 0;
  76              $lastblock = 0;
  77              $first = reset($instances);
  78              if ($first) {
  79                  $lastweight = $first->instance->weight - 2;
  80              }
  81  
  82              foreach ($instances as $instance) {
  83                  if ($instance->instance->id == $buibeforeid) {
  84                      // Location found, just calculate weight like in block_manager->create_block_contents() and quit the loop.
  85                      if ($lastblock == $buimoveid) {
  86                          // Same block, same place - nothing to move.
  87                          break;
  88                      }
  89                      $buinewweight = ($lastweight + $instance->instance->weight) / 2;
  90                      break;
  91                  }
  92                  $lastweight = $instance->instance->weight;
  93                  $lastblock = $instance->instance->id;
  94              }
  95          }
  96  
  97          // Move block if we need.
  98          if (isset($buinewweight)) {
  99              // Nasty hack.
 100              $_POST['bui_newweight'] = $buinewweight;
 101              $page->blocks->process_url_move();
 102          }
 103          break;
 104  }