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   1  <?php // $Id: delete_key.class.php,v 1.5 2007/10/10 05:25:20 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 delete completely one key
  28  
  29  class delete_key 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              'confirmdeletekey' => '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          $keyparam = required_param('key', 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['confirmdeletekey'] . '<br /><br />' . $keyparam . '</p>';
  78              $o.= '    <table class="boxaligncenter" cellpadding="20"><tr><td>';
  79              $o.= '      <div class="singlebutton">';
  80              $o.= '        <form action="index.php?action=delete_key&amp;confirmed=yes&amp;postaction=edit_table&amp;key=' . $keyparam . '&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 keys prev and next attributes
 101                          $tables =& $structure->getTables();
 102                          $table =& $structure->getTable($tableparam);
 103                          $keys =& $table->getKeys();
 104                          $key =& $table->getKey($keyparam);
 105                          if ($key->getPrevious()) {
 106                              $prev =& $table->getKey($key->getPrevious());
 107                              $prev->setNext($key->getNext());
 108                          }
 109                          if ($key->getNext()) {
 110                              $next =& $table->getKey($key->getNext());
 111                              $next->setPrevious($key->getPrevious());
 112                          }
 113                      /// Remove the key
 114                          $table->deleteKey($keyparam);
 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  ?>