[Summary view]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * @package    tool_xmldb
  19   * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
  20   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  21   */
  22  
  23  /**
  24   * This class will display the XML for one field being edited
  25   *
  26   * @package    tool_xmldb
  27   * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
  28   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  29   */
  30  class view_field_xml extends XMLDBAction {
  31  
  32      /**
  33       * Init method, every subclass will have its own
  34       */
  35      function init() {
  36          parent::init();
  37  
  38          // Set own custom attributes
  39          $this->sesskey_protected = false; // This action doesn't need sesskey protection
  40  
  41          // Get needed strings
  42          $this->loadStrings(array(
  43              // 'key' => 'module',
  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_XML;
  59  
  60          // These are always here
  61          global $CFG, $XMLDB;
  62  
  63          // Do the job, setting result as needed
  64  
  65          // Get the file parameter
  66          $field =  required_param('field', PARAM_PATH);
  67          $table =  required_param('table', PARAM_PATH);
  68          $select = required_param('select', PARAM_ALPHA); //original/edited
  69          // Get the dir containing the file
  70          $dirpath = required_param('dir', PARAM_PATH);
  71          $dirpath = $CFG->dirroot . $dirpath;
  72  
  73          // Get the correct dir
  74          if ($select == 'original') {
  75              if (!empty($XMLDB->dbdirs)) {
  76                  $base = $XMLDB->dbdirs[$dirpath];
  77              }
  78          } else if ($select == 'edited') {
  79              if (!empty($XMLDB->editeddirs)) {
  80                  $base = $XMLDB->editeddirs[$dirpath];
  81              }
  82          } else {
  83              $this->errormsg = 'Cannot access to ' . $select . ' info';
  84              $result = false;
  85          }
  86          if ($base) {
  87              // Only if the directory exists and it has been loaded
  88              if (!$base->path_exists || !$base->xml_loaded) {
  89                  $this->errormsg = 'Directory ' . $dirpath . ' not loaded';
  90                  return false;
  91              }
  92          } else {
  93              $this->errormsg = 'Problem handling ' . $select . ' files';
  94              return false;
  95          }
  96  
  97          // Get the structure
  98          if ($result) {
  99              if (!$structure = $base->xml_file->getStructure()) {
 100                  $this->errormsg = 'Error retrieving ' . $select . ' structure';
 101                  $result = false;
 102              }
 103          }
 104          // Get the tables
 105          if ($result) {
 106              if (!$tables = $structure->getTables()) {
 107                  $this->errormsg = 'Error retrieving ' . $select . ' tables';
 108                  $result = false;
 109              }
 110          }
 111          // Get the table
 112          if ($result && !$t = $structure->getTable($table)) {
 113              $this->errormsg = 'Error retrieving ' . $table . ' table';
 114              $result = false;
 115          }
 116          // Get the fields
 117          if ($result) {
 118              if (!$fields = $t->getFields()) {
 119                  $this->errormsg = 'Error retrieving ' . $select . ' fields';
 120                  $result = false;
 121              }
 122          }
 123          // Get the field
 124          if ($result && !$f = $t->getField($field)) {
 125              $this->errormsg = 'Error retrieving ' . $field . ' field';
 126              $result = false;
 127          }
 128  
 129          if ($result) {
 130              // Everything is ok. Generate the XML output
 131              $this->output = $f->xmlOutput();
 132          } else {
 133              // Switch to HTML and error
 134              $this->does_generate = ACTION_GENERATE_HTML;
 135          }
 136  
 137          // Return ok if arrived here
 138          return $result;
 139      }
 140  }
 141