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   1  <?php // $Id: field.class.php,v 1.6.2.3 2008/05/30 16:10:42 robertall Exp $
   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_number extends data_field_base {
  26      var $type = 'number';
  27  
  28      function data_field_number($field=0, $data=0) {
  29          parent::data_field_base($field, $data);
  30      }
  31  
  32      function update_content($recordid, $value, $name='') {
  33          $content = new object;
  34          $content->fieldid = $this->field->id;
  35          $content->recordid = $recordid;
  36          $value = trim($value);
  37          if (strlen($value) > 0) {
  38              $content->content = floatval($value);
  39          } else {
  40              $content->content = null;
  41          }
  42          if ($oldcontent = get_record('data_content','fieldid', $this->field->id, 'recordid', $recordid)) {
  43              $content->id = $oldcontent->id;
  44              return update_record('data_content', $content);
  45          } else {
  46              return insert_record('data_content', $content);
  47          }
  48      }
  49  
  50      function display_browse_field($recordid, $template) {
  51          if ($content = get_record('data_content', 'fieldid', $this->field->id, 'recordid', $recordid)) {
  52              if (strlen($content->content) < 1) {
  53                  return false;
  54              }
  55              $number = $content->content;
  56              $decimals = trim($this->field->param1);
  57              // only apply number formatting if param1 contains an integer number >= 0:
  58              if (preg_match("/^\d+$/", $decimals)) {
  59                  $decimals = $decimals * 1;
  60                  // removes leading zeros (eg. '007' -> '7'; '00' -> '0')
  61                  $str = format_float($number, $decimals, true);
  62                  // For debugging only:
  63  #                $str .= " ($decimals)";
  64              } else {
  65                  $str = $number;
  66              }
  67              return $str;
  68          }
  69          return false;
  70      }
  71  
  72      function display_search_field($value = '') {
  73          return '<input type="text" size="16" name="f_'.$this->field->id.'" value="'.$value.'" />';
  74      }
  75  
  76      function parse_search_field() {
  77          return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS);
  78      }
  79      
  80      // need to cast?
  81      function generate_sql($tablealias, $value) {
  82          return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content = '$value') ";
  83      }
  84  
  85      function get_sort_sql($fieldname) {
  86          global $CFG;
  87          switch ($CFG->dbfamily) {
  88              case 'mysql':
  89                  // string in an arithmetic operation is converted to a floating-point number
  90                  return '('.$fieldname.'+0.0)';
  91              case 'postgres':
  92                  // cast for PG
  93                  return 'CAST('.$fieldname.' AS REAL)';
  94              default:
  95                  // the rest, just the field name. TODO: Analyse behaviour under MSSQL and Oracle
  96                  return $fieldname;
  97          }
  98      }
  99  
 100  }
 101  
 102  ?>