mod/data/field/number/field.class.php

   1 <?php // $Id$
   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 ?>