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   1  <?php
   2  ///////////////////////////////////////////////////////////////////////////
   3  //                                                                       //
   4  // NOTICE OF COPYRIGHT                                                   //
   5  //                                                                       //
   6  // Moodle - Modular Object-Oriented Dynamic Learning Environment         //
   7  //          http://moodle.org                                            //
   8  //                                                                       //
   9  // Copyright (C) 1999-onwards Moodle Pty Ltd  http://moodle.com          //
  10  //                                                                       //
  11  // This program is free software; you can redistribute it and/or modify  //
  12  // it under the terms of the GNU General Public License as published by  //
  13  // the Free Software Foundation; either version 2 of the License, or     //
  14  // (at your option) any later version.                                   //
  15  //                                                                       //
  16  // This program is distributed in the hope that it will be useful,       //
  17  // but WITHOUT ANY WARRANTY; without even the implied warranty of        //
  18  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
  19  // GNU General Public License for more details:                          //
  20  //                                                                       //
  21  //          http://www.gnu.org/copyleft/gpl.html                         //
  22  //                                                                       //
  23  ///////////////////////////////////////////////////////////////////////////
  24  
  25  class data_field_menu extends data_field_base {
  26  
  27      var $type = 'menu';
  28  
  29      function display_add_field($recordid = 0, $formdata = null) {
  30          global $DB, $OUTPUT;
  31  
  32          if ($formdata) {
  33              $fieldname = 'field_' . $this->field->id;
  34              $content = $formdata->$fieldname;
  35          } else if ($recordid) {
  36              $content = $DB->get_field('data_content', 'content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid));
  37              $content = trim($content);
  38          } else {
  39              $content = '';
  40          }
  41          $str = '<div title="' . s($this->field->description) . '">';
  42  
  43          $options = array();
  44          $rawoptions = explode("\n",$this->field->param1);
  45          foreach ($rawoptions as $option) {
  46              $option = trim($option);
  47              if ($option) {
  48                  $options[$option] = $option;
  49              }
  50          }
  51  
  52          $str .= '<label for="' . 'field_' . $this->field->id . '">';
  53          $str .= html_writer::span($this->field->name, 'accesshide');
  54          if ($this->field->required) {
  55              $image = html_writer::img($OUTPUT->pix_url('req'), get_string('requiredelement', 'form'),
  56                                       array('class' => 'req', 'title' => get_string('requiredelement', 'form')));
  57              $str .= html_writer::div($image, 'inline-req');
  58          }
  59          $str .= '</label>';
  60          $str .= html_writer::select($options, 'field_'.$this->field->id, $content, array('' => get_string('menuchoose', 'data')),
  61                                      array('id' => 'field_'.$this->field->id, 'class' => 'mod-data-input'));
  62  
  63          $str .= '</div>';
  64  
  65          return $str;
  66      }
  67  
  68      function display_search_field($content = '') {
  69          global $CFG, $DB;
  70  
  71          $varcharcontent =  $DB->sql_compare_text('content', 255);
  72          $sql = "SELECT DISTINCT $varcharcontent AS content
  73                    FROM {data_content}
  74                   WHERE fieldid=? AND content IS NOT NULL";
  75  
  76          $usedoptions = array();
  77          if ($used = $DB->get_records_sql($sql, array($this->field->id))) {
  78              foreach ($used as $data) {
  79                  $value = $data->content;
  80                  if ($value === '') {
  81                      continue;
  82                  }
  83                  $usedoptions[$value] = $value;
  84              }
  85          }
  86  
  87          $options = array();
  88          foreach (explode("\n",$this->field->param1) as $option) {
  89              $option = trim($option);
  90              if (!isset($usedoptions[$option])) {
  91                  continue;
  92              }
  93              $options[$option] = $option;
  94          }
  95          if (!$options) {
  96              // oh, nothing to search for
  97              return '';
  98          }
  99  
 100          $return = html_writer::label(get_string('namemenu', 'data'), 'menuf_'. $this->field->id, false, array('class' => 'accesshide'));
 101          $return .= html_writer::select($options, 'f_'.$this->field->id, $content);
 102          return $return;
 103      }
 104  
 105       function parse_search_field() {
 106              return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS);
 107       }
 108  
 109      function generate_sql($tablealias, $value) {
 110          global $DB;
 111  
 112          static $i=0;
 113          $i++;
 114          $name = "df_menu_$i";
 115          $varcharcontent = $DB->sql_compare_text("{$tablealias}.content", 255);
 116  
 117          return array(" ({$tablealias}.fieldid = {$this->field->id} AND $varcharcontent = :$name) ", array($name=>$value));
 118      }
 119  
 120      /**
 121       * Check if a field from an add form is empty
 122       *
 123       * @param mixed $value
 124       * @param mixed $name
 125       * @return bool
 126       */
 127      function notemptyfield($value, $name) {
 128          return strval($value) !== '';
 129      }
 130  
 131  }