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Differences Between: [Versions 310 and 402] [Versions 311 and 402] [Versions 39 and 402] [Versions 400 and 402] [Versions 401 and 402] [Versions 402 and 403]

   1  <?php
   2  
   3  // This file is part of Moodle - http://moodle.org/
   4  //
   5  // Moodle is free software: you can redistribute it and/or modify
   6  // it under the terms of the GNU General Public License as published by
   7  // the Free Software Foundation, either version 3 of the License, or
   8  // (at your option) any later version.
   9  //
  10  // Moodle is distributed in the hope that it will be useful,
  11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  // GNU General Public License for more details.
  14  //
  15  // You should have received a copy of the GNU General Public License
  16  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17  
  18  /**
  19   * @package moodlecore
  20   * @subpackage backup
  21   * @copyright 2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  /**
  26   * Abstract class defining common stuff to be used by the backup stuff
  27   *
  28   * This class defines various constants and methods that will be used
  29   * by different classes, all related with the backup process. Just provides
  30   * the top hierarchy of the backup controller/worker stuff.
  31   *
  32   * TODO: Finish phpdocs
  33   */
  34  abstract class backup implements checksumable {
  35  
  36      // Backup type
  37      const TYPE_1ACTIVITY = 'activity';
  38      const TYPE_1SECTION  = 'section';
  39      const TYPE_1COURSE   = 'course';
  40  
  41      // Backup format
  42      const FORMAT_MOODLE  = 'moodle2';
  43      const FORMAT_MOODLE1 = 'moodle1';
  44      const FORMAT_IMSCC1  = 'imscc1';
  45      const FORMAT_IMSCC11 = 'imscc11';
  46      const FORMAT_UNKNOWN = 'unknown';
  47  
  48      // Interactive
  49      const INTERACTIVE_YES = true;
  50      const INTERACTIVE_NO  = false;
  51  
  52      /** Release the session during backup/restore */
  53      const RELEASESESSION_YES = true;
  54      /** Don't release the session during backup/restore */
  55      const RELEASESESSION_NO  = false;
  56  
  57      // Predefined modes (purposes) of the backup
  58      const MODE_GENERAL   = 10;
  59  
  60      /**
  61       * This is used for importing courses, and for duplicating activities.
  62       *
  63       * This mode will ensure that files are not included in the backup generation, and
  64       * during a restore they are copied from the existing file record.
  65       */
  66      const MODE_IMPORT    = 20;
  67      const MODE_HUB       = 30;
  68  
  69      /**
  70       * This mode is intended for duplicating courses and cases where the backup target is
  71       * within the same site.
  72       *
  73       * This mode will ensure that files are not included in the backup generation, and
  74       * during a restore they are copied from the existing file record.
  75       *
  76       * For creating a backup for archival purposes or greater longevity, use MODE_GENERAL.
  77       */
  78      const MODE_SAMESITE  = 40;
  79      const MODE_AUTOMATED = 50;
  80      const MODE_CONVERTED = 60;
  81  
  82      /**
  83       * This mode is for asynchronous backups.
  84       * These backups will run via adhoc scheduled tasks.
  85       */
  86      const MODE_ASYNC = 70;
  87  
  88      /**
  89       * This mode is for course copies.
  90       * It is similar to async, but identifies back up and restore tasks
  91       * as course copies.
  92       *
  93       * These copies will run via adhoc scheduled tasks.
  94       */
  95      const MODE_COPY = 80;
  96  
  97      // Target (new/existing/current/adding/deleting)
  98      const TARGET_CURRENT_DELETING = 0;
  99      const TARGET_CURRENT_ADDING   = 1;
 100      const TARGET_NEW_COURSE       = 2;
 101      const TARGET_EXISTING_DELETING= 3;
 102      const TARGET_EXISTING_ADDING  = 4;
 103  
 104      // Execution mode
 105      const EXECUTION_INMEDIATE = 1;
 106      const EXECUTION_DELAYED   = 2;
 107  
 108      // Status of the backup_controller
 109      const STATUS_CREATED     = 100;
 110      const STATUS_REQUIRE_CONV= 200;
 111      const STATUS_PLANNED     = 300;
 112      const STATUS_CONFIGURED  = 400;
 113      const STATUS_SETTING_UI  = 500;
 114      const STATUS_NEED_PRECHECK=600;
 115      const STATUS_AWAITING    = 700;
 116      const STATUS_EXECUTING   = 800;
 117      const STATUS_FINISHED_ERR= 900;
 118      const STATUS_FINISHED_OK =1000;
 119  
 120      // Logging levels
 121      const LOG_DEBUG   = 50;
 122      const LOG_INFO    = 40;
 123      const LOG_WARNING = 30;
 124      const LOG_ERROR   = 20;
 125      const LOG_NONE    = 10;
 126  
 127      // Some constants used to identify some helpfull processor variables
 128      // (using negative numbers to avoid any collision posibility
 129      // To be used when defining backup structures
 130      const VAR_COURSEID   = -1;  // To reference id of course in a processor
 131      const VAR_SECTIONID  = -11; // To reference id of section in a processor
 132      const VAR_ACTIVITYID = -21; // To reference id of activity in a processor
 133      const VAR_MODID      = -31; // To reference id of course_module in a processor
 134      const VAR_MODNAME    = -41; // To reference name of module in a processor
 135      const VAR_BLOCKID    = -51; // To reference id of block in a processor
 136      const VAR_BLOCKNAME  = -61; // To reference name of block in a processor
 137      const VAR_CONTEXTID  = -71; // To reference context id in a processor
 138      const VAR_PARENTID   = -81; // To reference the first parent->id in a backup structure
 139  
 140      // Used internally by the backup process
 141      const VAR_BACKUPID   = -1001; // To reference the backupid being processed
 142      const VAR_BASEPATH   = -1011; // To reference the dir where the file is generated
 143  
 144      // Type of operation
 145      const OPERATION_BACKUP  ='backup'; // We are performing one backup
 146      const OPERATION_RESTORE ='restore';// We are performing one restore
 147  
 148      // Options for "Include enrolment methods" restore setting.
 149      const ENROL_NEVER     = 0;
 150      const ENROL_WITHUSERS = 1;
 151      const ENROL_ALWAYS    = 2;
 152  
 153      // Version and release (to keep CFG->backup_version (and release) updated automatically).
 154      /**
 155       * Usually same than major release version, this is used to mark important
 156       * point is backup when some behavior/approach channged, in order to allow
 157       * conditional coding based on it.
 158       */
 159      const VERSION = 2023042400;
 160      /**
 161       * Usually same than major release zero version, mainly for informative/historic purposes.
 162       */
 163      const RELEASE = '4.2';
 164  
 165      /**
 166       * Cipher to be used in backup and restore operations.
 167       */
 168      const CIPHER = 'aes-256-cbc';
 169      /**
 170       * Bytes enforced for key, using the cypher above. Restrictive? Yes, but better than unsafe lengths
 171       */
 172      const CIPHERKEYLEN = 32;
 173  }
 174  
 175  /*
 176   * Exception class used by all the @backup stuff
 177   */
 178  abstract class backup_exception extends moodle_exception {
 179  
 180      public function __construct($errorcode, $a=NULL, $debuginfo=null) {
 181          parent::__construct($errorcode, 'error', '', $a, $debuginfo);
 182      }
 183  }