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Differences Between: [Versions 401 and 402] [Versions 401 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-plan
  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 the basis for one execution (backup/restore) step
  27   *
  28   * TODO: Finish phpdocs
  29   */
  30  abstract class base_step implements executable, loggable {
  31  
  32      protected $name;      // One simple name for identification purposes
  33      protected $task;      // Task this is part of
  34  
  35      /**
  36       * Constructor - instantiates one object of this class
  37       */
  38      public function __construct($name, $task = null) {
  39          if (!is_null($task) && !($task instanceof base_task)) {
  40              throw new base_step_exception('wrong_base_task_specified');
  41          }
  42          $this->name = $name;
  43          $this->task = $task;
  44          if (!is_null($task)) { // Add the step to the task if specified
  45              $task->add_step($this);
  46          }
  47      }
  48  
  49      public function get_name() {
  50          return $this->name;
  51      }
  52  
  53      public function set_task($task) {
  54          if (! $task instanceof base_task) {
  55              throw new base_step_exception('wrong_base_task_specified');
  56          }
  57          $this->task = $task;
  58      }
  59  
  60      /**
  61       * Destroy all circular references. It helps PHP 5.2 a lot!
  62       */
  63      public function destroy() {
  64          // No need to destroy anything recursively here, direct reset
  65          $this->task = null;
  66      }
  67  
  68      public function log($message, $level, $a = null, $depth = null, $display = false) {
  69          if (is_null($this->task)) {
  70              throw new base_step_exception('not_specified_base_task');
  71          }
  72          backup_helper::log($message, $level, $a, $depth, $display, $this->get_logger());
  73      }
  74  
  75  /// Protected API starts here
  76  
  77      protected function get_settings() {
  78          if (is_null($this->task)) {
  79              throw new base_step_exception('not_specified_base_task');
  80          }
  81          return $this->task->get_settings();
  82      }
  83  
  84      protected function get_setting($name) {
  85          if (is_null($this->task)) {
  86              throw new base_step_exception('not_specified_base_task');
  87          }
  88          return $this->task->get_setting($name);
  89      }
  90  
  91      protected function setting_exists($name) {
  92          if (is_null($this->task)) {
  93              throw new base_step_exception('not_specified_base_task');
  94          }
  95          return $this->task->setting_exists($name);
  96      }
  97  
  98      protected function get_setting_value($name) {
  99          if (is_null($this->task)) {
 100              throw new base_step_exception('not_specified_base_task');
 101          }
 102          return $this->task->get_setting_value($name);
 103      }
 104  
 105      protected function get_courseid() {
 106          if (is_null($this->task)) {
 107              throw new base_step_exception('not_specified_base_task');
 108          }
 109          return $this->task->get_courseid();
 110      }
 111  
 112      protected function get_basepath() {
 113          return $this->task->get_basepath();
 114      }
 115  
 116      protected function get_logger() {
 117          return $this->task->get_logger();
 118      }
 119  }
 120  
 121  
 122  /*
 123   * Exception class used by all the @base_step stuff
 124   */
 125  class base_step_exception extends moodle_exception {
 126  
 127      public function __construct($errorcode, $a=NULL, $debuginfo=null) {
 128          parent::__construct($errorcode, '', '', $a, $debuginfo);
 129      }
 130  }