1 | <?php |
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2 | /** |
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3 | * SortOrder.inc.php |
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4 | * Code by Strangecode :: www.strangecode.com :: This document contains copyrighted information |
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5 | * |
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6 | * SortOrder can determing how to sort results of a database query for display |
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7 | * on a listing. It can print column headers that will be links to |
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8 | * automatically change the sort and order. |
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9 | * |
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10 | * @requires This class requires Prefs.inc.php |
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11 | * |
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12 | * @author Quinn Comendant <quinn@strangecode.com> |
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13 | * @version 1.6.2 |
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14 | */ |
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15 | require_once dirname(__FILE__) . '/Prefs.inc.php'; |
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16 | |
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17 | class SortOrder { |
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18 | |
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19 | var $_columns; |
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20 | var $sort_by; |
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21 | var $order; |
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22 | var $asc_widget = '<img src="/admin/_widgets/sort_ascending.gif" alt="[ASC]" width="11" height="7" border="0" />'; |
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23 | var $desc_widget = '<img src="/admin/_widgets/sort_descending.gif" alt="[DESC]" width="11" height="7" border="0" />'; |
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24 | var $default_sort; |
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25 | var $default_order; |
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26 | |
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27 | /** |
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28 | * Constructor. Finds the current sort by and order. |
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29 | * |
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30 | * @param string $default_sort If not found elsewhere, this will be the |
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31 | * current sort by. |
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32 | * @param string $default_order If not found elsewhere, this will be the |
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33 | * current order. |
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34 | */ |
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35 | function SortOrder($default_sort = '', $default_order = '') |
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36 | { |
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37 | $this->setDefault($default_sort, $default_order); |
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38 | |
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39 | $this->default_sort = $default_sort; |
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40 | $this->default_order = $default_order; |
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41 | } |
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42 | |
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43 | /** |
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44 | * Build an array of valid sort SQL for each DB column. This SQL is reference |
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45 | * by the name and 'asc' or 'desc'. |
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46 | * |
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47 | * @param string $name Reference name for the column this SQL sorts on. |
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48 | * @param string $asc_sql The sort SQL if $this->order is ascending. |
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49 | * @param string $desc_sql The sort SQL if $this->order is descending. |
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50 | */ |
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51 | function setColumn($name, $asc_sql, $desc_sql) |
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52 | { |
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53 | $this->_columns[$name] = array( |
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54 | 'asc' => $asc_sql, |
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55 | 'desc' => $desc_sql |
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56 | ); |
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57 | } |
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58 | |
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59 | /** |
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60 | * Set sort and order values. This is how you set new sort values after |
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61 | * already declaring a SortOrder object, but expect values to come from |
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62 | * getFormData. |
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63 | * |
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64 | * @param string $default_sort If not found elsewhere, this will be the |
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65 | * current sort by. |
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66 | * @param string $default_order If not found elsewhere, this will be the |
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67 | * current order. |
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68 | */ |
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69 | function setDefault($default_sort = '', $default_order = '') |
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70 | { |
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71 | $prefs =& Prefs::getInstance(); |
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72 | |
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73 | // Which column to sort by? |
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74 | // (1) By GET or POST specification, if available. |
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75 | // (2) By saved preference, if available. |
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76 | // (3) By default (provided at class instantiation). |
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77 | $new_sort_by = getFormData('sort'); |
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78 | if (!empty($new_sort_by)) { |
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79 | $this->sort_by = $new_sort_by; |
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80 | $prefs->set('sort_by', $this->sort_by, $_SERVER['PHP_SELF']); |
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81 | } else if ($prefs->exists('sort_by', $_SERVER['PHP_SELF'])) { |
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82 | $this->sort_by = $prefs->get('sort_by', $_SERVER['PHP_SELF']); |
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83 | } else { |
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84 | $this->sort_by = $default_sort; |
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85 | } |
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86 | |
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87 | // Which sort order to use? |
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88 | // (1) By GET or POST specification, if available. |
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89 | // (2) By saved preference, if available. |
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90 | // (3) By default (provided at class instanciation). |
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91 | $new_order = getFormData('order'); |
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92 | if (!empty($new_order)) { |
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93 | $this->order = $new_order; |
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94 | $prefs->set('sort_order', $this->order, $_SERVER['PHP_SELF']); |
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95 | } else if ($prefs->exists('sort_order', $_SERVER['PHP_SELF'])) { |
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96 | $this->order = $prefs->get('sort_order', $_SERVER['PHP_SELF']); |
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97 | } else { |
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98 | $this->order = $default_order; |
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99 | } |
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100 | } |
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101 | |
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102 | |
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103 | /** |
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104 | * Forcibly set sort and order values. This is how you set new sort values after |
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105 | * already declaring a SortOrder object. This will ignore getFormData values. |
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106 | * |
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107 | * @param string $sort The sort by name. |
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108 | * @param string $order The order direction (ASC, |
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109 | * for example, for an alphabetical sort) |
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110 | */ |
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111 | function set($sort = null, $order = null) |
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112 | { |
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113 | $prefs =& Prefs::getInstance(); |
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114 | |
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115 | // Set new sort value. |
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116 | if (isset($sort)) { |
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117 | $this->sort_by = $sort; |
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118 | $prefs->set('sort_by', $this->sort_by, $_SERVER['PHP_SELF']); |
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119 | } |
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120 | |
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121 | // Set new order value. |
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122 | if (isset($order)) { |
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123 | $this->order = $order; |
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124 | $prefs->set('sort_order', $this->order, $_SERVER['PHP_SELF']); |
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125 | } |
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126 | } |
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127 | |
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128 | |
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129 | /** |
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130 | * Returns the SQL code to sort by set column and set order. |
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131 | */ |
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132 | function getSortOrderSQL() |
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133 | { |
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134 | $app =& App::getInstance(); |
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135 | $db =& DB::getInstance(); |
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136 | |
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137 | if (!isset($this->_columns[strtolower($this->sort_by)])) { |
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138 | $this->sort_by = $this->default_sort; |
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139 | $this->order = $this->default_order; |
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140 | } |
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141 | if (!isset($this->_columns[strtolower($this->sort_by)][strtolower($this->order)])) { |
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142 | $this->order = 'ASC'; |
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143 | } |
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144 | |
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145 | if (!empty($this->_columns[strtolower($this->sort_by)][strtolower($this->order)])) { |
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146 | return sprintf(' ORDER BY %s ', $db->escapeString($this->_columns[strtolower($this->sort_by)][strtolower($this->order)])); |
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147 | } else { |
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148 | $app->logMsg(sprintf('Could not find SQL to sort by %s %s.', $this->sort_by, $this->order), LOG_WARNING, __FILE__, __LINE__); |
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149 | return ''; |
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150 | } |
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151 | } |
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152 | |
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153 | |
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154 | /** |
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155 | * Prints a link for a column header with URL sort determining logic. |
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156 | * |
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157 | * @param string $col The database column to sort by. |
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158 | * @param string $col_name The human-readable title of the column. |
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159 | * @param string $default_order The default order for this column (ASC, |
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160 | * for example, for an alphabetical sort) |
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161 | */ |
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162 | function printSortHeader($col, $col_name, $default_order='ASC') |
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163 | { |
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164 | $app =& App::getInstance(); |
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165 | |
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166 | if ($this->sort_by == $col) { |
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167 | if (strtolower($this->order) == 'desc') { |
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168 | ?><a href="<?php echo $app->oHREF($_SERVER['PHP_SELF'] . '?sort=' . $col . '&order=ASC'); ?>" title="<?php echo _("Change to ascending sort order"); ?>"><?php echo $this->desc_widget; ?></a><?php echo $col_name; ?><?php |
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169 | } else { |
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170 | ?><a href="<?php echo $app->oHREF($_SERVER['PHP_SELF'] . '?sort=' . $col . '&order=DESC'); ?>" title="<?php echo _("Change to descending sort order"); ?>"><?php echo $this->asc_widget; ?></a><?php echo $col_name; ?><?php |
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171 | } |
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172 | } else { |
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173 | ?><a href="<?php echo $app->oHREF($_SERVER['PHP_SELF'] . '?sort=' . $col . '&order=' . $default_order); ?>" title="<?php echo sprintf(_("Sort by %s"), $col_name); ?>"><?php echo $col_name; ?></a><?php |
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174 | } |
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175 | } |
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176 | |
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177 | } |
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178 | |
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179 | ?> |
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