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Differences Between: [Versions 310 and 403] [Versions 311 and 403] [Versions 39 and 403] [Versions 400 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   * My Moodle -- a user's personal dashboard
  19   *
  20   * This file contains common functions for the dashboard and profile pages.
  21   *
  22   * @package    moodlecore
  23   * @subpackage my
  24   * @copyright  2010 Remote-Learner.net
  25   * @author     Hubert Chathi <hubert@remote-learner.net>
  26   * @author     Olav Jordan <olav.jordan@remote-learner.net>
  27   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  28   */
  29  
  30  define('MY_PAGE_PUBLIC', 0);
  31  define('MY_PAGE_PRIVATE', 1);
  32  define('MY_PAGE_DEFAULT', '__default');
  33  define('MY_PAGE_COURSES', '__courses');
  34  
  35  require_once("$CFG->libdir/blocklib.php");
  36  
  37  /**
  38   * For a given user, this returns the $page information for their My Moodle page
  39   *
  40   * @param int|null $userid the id of the user whose page should be retrieved
  41   * @param int|null $private either MY_PAGE_PRIVATE or MY_PAGE_PUBLIC
  42   * @param string|null $pagename Differentiate between standard /my or /courses pages.
  43   */
  44  function my_get_page(?int $userid, int $private = MY_PAGE_PRIVATE, string $pagename = MY_PAGE_DEFAULT) {
  45      global $DB, $CFG;
  46  
  47      if (empty($CFG->forcedefaultmymoodle) && $userid) {  // Ignore custom My Moodle pages if admin has forced them
  48          // Does the user have their own page defined?  If so, return it.
  49          if ($customised = $DB->get_record(
  50              'my_pages',
  51              array('userid' => $userid, 'private' => $private, 'name' => $pagename),
  52              '*',
  53              IGNORE_MULTIPLE
  54          )) {
  55              return $customised;
  56          }
  57      }
  58  
  59      // Otherwise return the system default page
  60      return $DB->get_record('my_pages', array('userid' => null, 'name' => $pagename, 'private' => $private), '*', IGNORE_MULTIPLE);
  61  }
  62  
  63  
  64  /**
  65   * This copies a system default page to the current user
  66   *
  67   * @param int $userid the id of the user whose page should be reset
  68   * @param int $private either MY_PAGE_PRIVATE or MY_PAGE_PUBLIC
  69   * @param string $pagetype either my-index or user-profile
  70   * @param string $pagename Differentiate between standard /my or /courses pages.
  71   */
  72  function my_copy_page(
  73      int $userid,
  74      int $private = MY_PAGE_PRIVATE,
  75      string $pagetype = 'my-index',
  76      string $pagename = MY_PAGE_DEFAULT
  77  ) {
  78      global $DB;
  79  
  80      if ($customised = $DB->get_record(
  81          'my_pages',
  82          array('userid' => $userid, 'name' => $pagename, 'private' => $private),
  83          '*',
  84          IGNORE_MULTIPLE
  85      )) {
  86          return $customised;  // We're done!
  87      }
  88  
  89      // Get the system default page
  90      if (!$systempage = $DB->get_record(
  91          'my_pages',
  92          array('userid' => null, 'name' => $pagename, 'private' => $private),
  93          '*',
  94          IGNORE_MULTIPLE
  95      )) {
  96          return false;  // error
  97      }
  98  
  99      // Clone the basic system page record
 100      $page = clone($systempage);
 101      unset($page->id);
 102      $page->userid = $userid;
 103      $page->id = $DB->insert_record('my_pages', $page);
 104  
 105      // Clone ALL the associated blocks as well
 106      $systemcontext = context_system::instance();
 107      $usercontext = context_user::instance($userid);
 108  
 109      $blockinstances = $DB->get_records('block_instances', array('parentcontextid' => $systemcontext->id,
 110                                                                  'pagetypepattern' => $pagetype,
 111                                                                  'subpagepattern' => $systempage->id));
 112      $roles = get_all_roles();
 113      $newblockinstanceids = [];
 114      foreach ($blockinstances as $instance) {
 115          $originalid = $instance->id;
 116          $originalcontext = context_block::instance($originalid);
 117          unset($instance->id);
 118          $instance->parentcontextid = $usercontext->id;
 119          $instance->subpagepattern = $page->id;
 120          $instance->timecreated = time();
 121          $instance->timemodified = $instance->timecreated;
 122          $instance->id = $DB->insert_record('block_instances', $instance);
 123          $newblockinstanceids[$originalid] = $instance->id;
 124          $blockcontext = context_block::instance($instance->id);  // Just creates the context record
 125          $block = block_instance($instance->blockname, $instance);
 126          if (empty($block) || !$block->instance_copy($originalid)) {
 127              debugging("Unable to copy block-specific data for original block
 128                  instance: $originalid to new block instance: $instance->id for
 129                  block: $instance->blockname", DEBUG_DEVELOPER);
 130          }
 131          // Check if there are any overrides on this block instance.
 132          // We check against all roles, not just roles assigned to the user.
 133          // This is so any overrides that are applied to the system default page
 134          // will be applied to the user's page as well, even if their role assignment changes in the future.
 135          foreach ($roles as $role) {
 136              $rolecapabilities = get_capabilities_from_role_on_context($role, $originalcontext);
 137              // If there are overrides, then apply them to the new block instance.
 138              foreach ($rolecapabilities as $rolecapability) {
 139                  role_change_permission(
 140                      $rolecapability->roleid,
 141                      $blockcontext,
 142                      $rolecapability->capability,
 143                      $rolecapability->permission
 144                  );
 145              }
 146          }
 147      }
 148  
 149      // Clone block position overrides.
 150      if ($blockpositions = $DB->get_records('block_positions',
 151              ['subpage' => $systempage->id, 'pagetype' => $pagetype, 'contextid' => $systemcontext->id])) {
 152          foreach ($blockpositions as &$positions) {
 153              $positions->subpage = $page->id;
 154              $positions->contextid = $usercontext->id;
 155              if (array_key_exists($positions->blockinstanceid, $newblockinstanceids)) {
 156                  // For block instances that were defined on the default dashboard and copied to the user dashboard
 157                  // use the new blockinstanceid.
 158                  $positions->blockinstanceid = $newblockinstanceids[$positions->blockinstanceid];
 159              }
 160              unset($positions->id);
 161          }
 162          $DB->insert_records('block_positions', $blockpositions);
 163      }
 164  
 165      return $page;
 166  }
 167  
 168  /**
 169   * For a given user, this deletes their My Moodle page and returns them to the system default.
 170   *
 171   * @param int $userid the id of the user whose page should be reset
 172   * @param int $private either MY_PAGE_PRIVATE or MY_PAGE_PUBLIC
 173   * @param string $pagetype either my-index or user-profile
 174   * @param string $pagename Differentiate between standard /my or /courses pages.
 175   * @return mixed system page, or false on error
 176   */
 177  function my_reset_page(
 178      int $userid,
 179      int $private = MY_PAGE_PRIVATE,
 180      string $pagetype='my-index',
 181      string $pagename = MY_PAGE_DEFAULT
 182  ) {
 183      global $DB, $CFG;
 184  
 185      $page = my_get_page($userid, $private, $pagename);
 186      if ($page->userid == $userid) {
 187          $context = context_user::instance($userid);
 188          if ($blocks = $DB->get_records('block_instances', array('parentcontextid' => $context->id,
 189                  'pagetypepattern' => $pagetype))) {
 190              foreach ($blocks as $block) {
 191                  if (is_null($block->subpagepattern) || $block->subpagepattern == $page->id) {
 192                      blocks_delete_instance($block);
 193                  }
 194              }
 195          }
 196          $DB->delete_records('block_positions', ['subpage' => $page->id, 'pagetype' => $pagetype, 'contextid' => $context->id]);
 197          $DB->delete_records('my_pages', array('id' => $page->id, 'name' => $pagename));
 198      }
 199  
 200      // Get the system default page
 201      if (!$systempage = $DB->get_record(
 202          'my_pages',
 203          array('userid' => null, 'name' => $pagename, 'private' => $private),
 204          '*',
 205          IGNORE_MULTIPLE
 206      )) {
 207          return false; // error
 208      }
 209  
 210      // Trigger dashboard has been reset event.
 211      $eventparams = array(
 212          'context' => context_user::instance($userid),
 213          'other' => array(
 214              'private' => $private,
 215              'pagetype' => $pagetype,
 216          ),
 217      );
 218      $event = \core\event\dashboard_reset::create($eventparams);
 219      $event->trigger();
 220      return $systempage;
 221  }
 222  
 223  /**
 224   * Resets the page customisations for all users.
 225   *
 226   * @param int $private Either MY_PAGE_PRIVATE or MY_PAGE_PUBLIC.
 227   * @param string $pagetype Either my-index or user-profile.
 228   * @param progress_bar|null $progressbar A progress bar to update.
 229   * @param string $pagename Differentiate between standard /my or /courses pages.
 230   * @return void
 231   */
 232  function my_reset_page_for_all_users(
 233      int $private = MY_PAGE_PRIVATE,
 234      string $pagetype = 'my-index',
 235      ?progress_bar $progressbar = null,
 236      string $pagename = MY_PAGE_DEFAULT
 237  ) {
 238      global $DB;
 239  
 240      // This may take a while. Raise the execution time limit.
 241      core_php_time_limit::raise();
 242  
 243      $users = $DB->get_fieldset_select(
 244          'my_pages',
 245          'DISTINCT(userid)',
 246          'userid IS NOT NULL AND private = :private',
 247          ['private' => $private]
 248      );
 249      $chunks = array_chunk($users, 20);
 250  
 251      if (!empty($progressbar) && count($chunks) > 0) {
 252          $count = count($chunks);
 253          $message = get_string('inprogress');
 254          $progressbar->update(0, $count, $message);
 255      }
 256  
 257      foreach ($chunks as $key => $userchunk) {
 258          list($infragment, $inparams) = $DB->get_in_or_equal($userchunk,  SQL_PARAMS_NAMED);
 259          // Find all the user pages and all block instances in them.
 260          $sql = "SELECT bi.id
 261                    FROM {my_pages} p
 262                    JOIN {context} ctx ON ctx.instanceid = p.userid AND ctx.contextlevel = :usercontextlevel
 263                    JOIN {block_instances} bi ON bi.parentcontextid = ctx.id
 264                     AND bi.pagetypepattern = :pagetypepattern
 265                     AND (bi.subpagepattern IS NULL OR bi.subpagepattern = " . $DB->sql_cast_to_char('p.id') . ")
 266                   WHERE p.private = :private
 267                     AND p.name = :name
 268                     AND p.userid $infragment";
 269  
 270          $params = array_merge([
 271              'private' => $private,
 272              'usercontextlevel' => CONTEXT_USER,
 273              'pagetypepattern' => $pagetype,
 274              'name' => $pagename
 275          ], $inparams);
 276          $blockids = $DB->get_fieldset_sql($sql, $params);
 277  
 278          // Wrap the SQL queries in a transaction.
 279          $transaction = $DB->start_delegated_transaction();
 280  
 281          // Delete the block instances.
 282          if (!empty($blockids)) {
 283              blocks_delete_instances($blockids);
 284          }
 285  
 286          // Finally delete the pages.
 287          $DB->delete_records_select(
 288              'my_pages',
 289              "userid $infragment AND private = :private",
 290              array_merge(['private' => $private], $inparams)
 291          );
 292  
 293          // We should be good to go now.
 294          $transaction->allow_commit();
 295  
 296          if (!empty($progressbar)) {
 297              $progressbar->update(((int) $key + 1), $count, $message);
 298          }
 299      }
 300  
 301      // Trigger dashboard has been reset event.
 302      $eventparams = array(
 303          'context' => context_system::instance(),
 304          'other' => array(
 305              'private' => $private,
 306              'pagetype' => $pagetype,
 307          ),
 308      );
 309      $event = \core\event\dashboards_reset::create($eventparams);
 310      $event->trigger();
 311  
 312      if (!empty($progressbar)) {
 313          $progressbar->update(1, 1, get_string('completed'));
 314      }
 315  }
 316  
 317  class my_syspage_block_manager extends block_manager {
 318      // HACK WARNING!
 319      // TODO: figure out a better way to do this
 320      /**
 321       * Load blocks using the system context, rather than the user's context.
 322       *
 323       * This is needed because the My Moodle pages set the page context to the
 324       * user's context for access control, etc.  But the blocks for the system
 325       * pages are stored in the system context.
 326       */
 327      public function load_blocks($includeinvisible = null) {
 328          $origcontext = $this->page->context;
 329          $this->page->context = context_system::instance();
 330          parent::load_blocks($includeinvisible);
 331          $this->page->context = $origcontext;
 332      }
 333  }