admin/xmldb/actions/delete_index/delete_index.class.php

   1 <?php // $Id$
   2
   3 ///////////////////////////////////////////////////////////////////////////
   4 //                                                                       //
   5 // NOTICE OF COPYRIGHT                                                   //
   6 //                                                                       //
   7 // Moodle - Modular Object-Oriented Dynamic Learning Environment         //
   8 //          http://moodle.com                                            //
   9 //                                                                       //
  10 // Copyright (C) 2001-3001 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 delete completely one index
  28
  29 class delete_index 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             'confirmdeleteindex' => 'xmldb',
  42             'yes' => '',
  43             'no' => ''
  44         ));
  45     }
  46
  47     /**
  48      * Invoke method, every class will have its own
  49      * returns true/false on completion, setting both
  50      * errormsg and output as necessary
  51      */
  52     function invoke() {
  53         parent::invoke();
  54
  55         $result = true;
  56
  57     /// Set own core attributes
  58         $this->does_generate = ACTION_GENERATE_HTML;
  59
  60     /// These are always here
  61         global $CFG, $XMLDB;
  62
  63     /// Do the job, setting result as needed
  64
  65     /// Get the dir containing the file
  66         $dirpath = required_param('dir', PARAM_PATH);
  67         $dirpath = $CFG->dirroot . stripslashes_safe($dirpath);
  68         $tableparam = required_param('table', PARAM_PATH);
  69         $indexparam = required_param('index', PARAM_PATH);
  70
  71         $confirmed = optional_param('confirmed', false, PARAM_BOOL);
  72
  73     /// If  not confirmed, show confirmation box
  74         if (!$confirmed) {
  75             $o = '<table width="60" class="generalbox" border="0" cellpadding="5" cellspacing="0" id="notice">';
  76             $o.= '  <tr><td class="generalboxcontent">';
  77             $o.= '    <p class="centerpara">' . $this->str['confirmdeleteindex'] . '<br /><br />' . $indexparam . '</p>';
  78             $o.= '    <table class="boxaligncenter" cellpadding="20"><tr><td>';
  79             $o.= '      <div class="singlebutton">';
  80             $o.= '        <form action="index.php?action=delete_index&amp;confirmed=yes&amp;postaction=edit_table&amp;index=' . $indexparam . '&amp;table=' . $tableparam . '&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '" method="post"><fieldset class="invisiblefieldset">';
  81             $o.= '          <input type="submit" value="'. $this->str['yes'] .'" /></fieldset></form></div>';
  82             $o.= '      </td><td>';
  83             $o.= '      <div class="singlebutton">';
  84             $o.= '        <form action="index.php?action=edit_table&amp;table=' . $tableparam . '&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '" method="post"><fieldset class="invisiblefieldset">';
  85             $o.= '          <input type="submit" value="'. $this->str['no'] .'" /></fieldset></form></div>';
  86             $o.= '      </td></tr>';
  87             $o.= '    </table>';
  88             $o.= '  </td></tr>';
  89             $o.= '</table>';
  90
  91             $this->output = $o;
  92         } else {
  93         /// Get the edited dir
  94             if (!empty($XMLDB->editeddirs)) {
  95                 if (isset($XMLDB->editeddirs[$dirpath])) {
  96                     $dbdir =& $XMLDB->dbdirs[$dirpath];
  97                     $editeddir =& $XMLDB->editeddirs[$dirpath];
  98                     if ($editeddir) {
  99                         $structure =& $editeddir->xml_file->getStructure();
 100                     /// Move adjacent indexes prev and next attributes
 101                         $tables =& $structure->getTables();
 102                         $table =& $structure->getTable($tableparam);
 103                         $indexes =& $table->getIndexes();
 104                         $index =& $table->getIndex($indexparam);
 105                         if ($index->getPrevious()) {
 106                             $prev =& $table->getIndex($index->getPrevious());
 107                             $prev->setNext($index->getNext());
 108                         }
 109                         if ($index->getNext()) {
 110                             $next =& $table->getIndex($index->getNext());
 111                             $next->setPrevious($index->getPrevious());
 112                         }
 113                     /// Remove the index
 114                         $table->deleteIndex($indexparam);
 115
 116                     /// Recalculate the hash
 117                         $structure->calculateHash(true);
 118
 119                     /// If the hash has changed from the original one, change the version
 120                     /// and mark the structure as changed
 121                         $origstructure =& $dbdir->xml_file->getStructure();
 122                         if ($structure->getHash() != $origstructure->getHash()) {
 123                             $structure->setVersion(userdate(time(), '%Y%m%d', 99, false));
 124                             $structure->setChanged(true);
 125                         }
 126                     }
 127                 }
 128             }
 129         }
 130
 131     /// Launch postaction if exists (leave this here!)
 132         if ($this->getPostAction() && $result) {
 133             return $this->launch($this->getPostAction());
 134         }
 135
 136     /// Return ok if arrived here
 137         return $result;
 138     }
 139 }
 140 ?>