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   1  <?php // $Id: move_updown_table.class.php,v 1.4 2007/10/10 05:25:25 nicolasconnault Exp $
   2  
   3  ///////////////////////////////////////////////////////////////////////////
   4  //                                                                       //
   5  // NOTICE OF COPYRIGHT                                                   //
   6  //                                                                       //
   7  // Moodle - Modular Object-Oriented Dynamic Learning Environment         //
   8  //          http://moodle.com                                            //
   9  //                                                                       //
  10  // Copyright (C) 1999 onwards Martin Dougiamas        http://dougiamas.com  //
  11  //           (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
  12  //                                                                       //
  13  // This program is free software; you can redistribute it and/or modify  //
  14  // it under the terms of the GNU General Public License as published by  //
  15  // the Free Software Foundation; either version 2 of the License, or     //
  16  // (at your option) any later version.                                   //
  17  //                                                                       //
  18  // This program is distributed in the hope that it will be useful,       //
  19  // but WITHOUT ANY WARRANTY; without even the implied warranty of        //
  20  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
  21  // GNU General Public License for more details:                          //
  22  //                                                                       //
  23  //          http://www.gnu.org/copyleft/gpl.html                         //
  24  //                                                                       //
  25  ///////////////////////////////////////////////////////////////////////////
  26  
  27  /// This class will will move one table down
  28  
  29  class move_updown_table extends XMLDBAction {
  30  
  31      /**
  32       * Init method, every subclass will have its own
  33       */
  34      function init() {
  35          parent::init();
  36  
  37      /// Set own custom attributes
  38  
  39      /// Get needed strings
  40          $this->loadStrings(array(
  41          /// 'key' => 'module',
  42          ));
  43      }
  44  
  45      /**
  46       * Invoke method, every class will have its own
  47       * returns true/false on completion, setting both
  48       * errormsg and output as necessary
  49       */
  50      function invoke() {
  51          parent::invoke();
  52  
  53          $result = true;
  54  
  55      /// Set own core attributes
  56          $this->does_generate = ACTION_NONE;
  57          //$this->does_generate = ACTION_GENERATE_HTML;
  58  
  59      /// These are always here
  60          global $CFG, $XMLDB;
  61  
  62      /// Do the job, setting result as needed
  63      /// Get the dir containing the file
  64          $dirpath = required_param('dir', PARAM_PATH);
  65          $dirpath = $CFG->dirroot . stripslashes_safe($dirpath);
  66  
  67      /// Get the correct dirs
  68          if (!empty($XMLDB->dbdirs)) {
  69              $dbdir =& $XMLDB->dbdirs[$dirpath];
  70          } else {
  71              return false;
  72          }
  73          if (!empty($XMLDB->editeddirs)) {
  74              $editeddir =& $XMLDB->editeddirs[$dirpath];
  75              $structure =& $editeddir->xml_file->getStructure();
  76          }
  77      /// ADD YOUR CODE HERE
  78          $prev = NULL;
  79          $next = NULL;
  80          $tableparam = required_param('table', PARAM_CLEAN);
  81          $direction  = required_param('direction', PARAM_ALPHA);
  82          $tables =& $structure->getTables();
  83          if ($direction == 'down') {
  84              $table =& $structure->getTable($tableparam);
  85              $swap  =& $structure->getTable($table->getNext());
  86          } else {
  87              $swap  =& $structure->getTable($tableparam);
  88              $table =& $structure->getTable($swap->getPrevious());
  89          }
  90  
  91      /// Change the table before the pair
  92          if ($table->getPrevious()) {
  93              $prev =& $structure->getTable($table->getPrevious());
  94              $prev->setNext($swap->getName());
  95              $swap->setPrevious($prev->getName());
  96              $prev->setChanged(true);
  97          } else {
  98              $swap->setPrevious(NULL);
  99          }
 100      /// Change the table after the pair
 101          if ($swap->getNext()) {
 102              $next =& $structure->getTable($swap->getNext());
 103              $next->setPrevious($table->getName());
 104              $table->setNext($next->getName());
 105              $next->setChanged(true);
 106          } else {
 107              $table->setNext(NULL);
 108          }
 109      /// Swap the tables
 110          $table->setPrevious($swap->getName());
 111          $swap->setNext($table->getName());
 112  
 113      /// Table has changed
 114          $table->setChanged(true);
 115  
 116      /// Reorder the structure
 117          $structure->orderTables($tables);
 118      /// Send tables back to structure (the order above break refs)
 119          $structure->setTables($tables);
 120      /// Recalculate the hash
 121          $structure->calculateHash(true);
 122  
 123      /// If the hash has changed from the original one, change the version
 124      /// and mark the structure as changed
 125          $origstructure =& $dbdir->xml_file->getStructure();
 126          if ($structure->getHash() != $origstructure->getHash()) {
 127              $structure->setVersion(userdate(time(), '%Y%m%d', 99, false));
 128              $structure->setChanged(true);
 129          }
 130  
 131      /// Launch postaction if exists (leave this here!)
 132          if ($this->getPostAction() && $result) {
 133              return $this->launch($this->getPostAction());
 134          }
 135  
 136      /// Return ok if arrived here
 137          return $result;
 138      }
 139  }
 140  ?>