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Code source de SPIP 1.8.3 |
1 <?php 2 3 /***************************************************************************\ 4 * SPIP, Systeme de publication pour l'internet * 5 * * 6 * Copyright (c) 2001-2005 * 7 * Arnaud Martin, Antoine Pitrou, Philippe Riviere, Emmanuel Saint-James * 8 * * 9 * Ce programme est un logiciel libre distribue sous licence GNU/GPL. * 10 * Pour plus de details voir le fichier COPYING.txt ou l'aide en ligne. * 11 \***************************************************************************/ 12 13 14 // 15 // Ce fichier ne sera execute qu'une fois 16 if (defined("_ECRIRE_INC_OBJET_BASE")) return; 17 define("_ECRIRE_INC_OBJET_BASE", "1"); 18 19 20 class _Abstract { 21 function abstract_error($str) { 22 die ("<h4>".$str."<br>"._T('info_contact_developpeur')."</h4>"); 23 } 24 function abstract_func() { 25 $this->abstract_error(_T('avis_erreur_fonction_contexte')); 26 } 27 function _Abstract() { $this->abstract_func(); } 28 } 29 30 31 class ObjectCacheInstance extends _Abstract { 32 // Variable values (array) 33 var $fast_vars; 34 var $slow_vars; 35 36 // Variable status 37 var $fast_vars_loaded = false; 38 var $slow_vars_loaded = false; 39 40 // Is modified ? 41 var $dirty = false; 42 43 function ObjectCacheInstance() { 44 $this->fast_vars = array(); 45 $this->slow_vars = array(); 46 } 47 } 48 49 50 class _ObjectFactory extends _Abstract { 51 // Factory ID 52 var $id_factory; 53 54 // Object class name (for instantiation) 55 var $object_class; 56 57 // SQL table name/pattern 58 var $sql_table; 59 var $sql_id; 60 61 // Plain array 62 var $fast_vars_list, $nb_fast_vars; 63 var $slow_vars_list, $nb_slow_vars; 64 65 // Associative array 66 var $fast_vars_array; 67 var $slow_vars_array; 68 69 // SQL field names 70 var $fast_vars_sql; 71 var $slow_vars_sql; 72 73 // Object cache 74 var $cache; 75 76 // --------------------------------------------------------- 77 78 // 79 // Init factory helper variables and constants 80 // 81 function init_factory($id_factory) { 82 $this->id_factory = $id_factory; 83 84 // Store different representations of fast vars 85 if (is_array($this->fast_vars_list)) { 86 reset($this->fast_vars_list); 87 while (list($key, $val) = each($this->fast_vars_list)) { 88 $this->fast_vars_array[$val] = $val; 89 $this->fast_vars_sql[] = $this->sql_table.'.'.$val; 90 } 91 $this->fast_vars_sql = join(', ', $this->fast_vars_sql); 92 $this->nb_fast_vars = count($this->fast_vars_list); 93 } 94 else $this->nb_fast_vars = 0; 95 96 // Store different representations of slow vars 97 if (is_array($this->slow_vars_list)) { 98 reset($this->slow_vars_list); 99 while (list($key, $val) = each($this->slow_vars_list)) { 100 $this->slow_vars_array[$val] = $val; 101 $this->slow_vars_sql[] = $this->sql_table.'.'.$val; 102 } 103 $this->slow_vars_sql = join(', ', $this->slow_vars_sql); 104 $this->nb_slow_vars = count($this->slow_vars_list); 105 } 106 else $this->nb_slow_vars = 0; 107 108 // Default value for object id in database 109 if (!$this->sql_id) { 110 $this->sql_id = 'id_'.strtolower($this->object_class); 111 } 112 } 113 114 115 // 116 // Object management methods 117 // 118 119 function new_object($id) { $this->abstract(); } 120 121 function create_object_cache_instance($id) { 122 if (!($g = $this->cache[$id])) { 123 $g = '_'.$this->object_class.'_'.$id; 124 $GLOBALS[$g] = new ObjectCacheInstance; 125 $this->cache[$id] = $g; 126 } 127 return $g; 128 } 129 130 // Create a new alias for an object 131 // (aliases are the only way by which user code sees an object) 132 function create_object_alias($id) { 133 $class = $this->object_class; 134 $alias = new $class; 135 $alias->init_object($this->id_factory, $id); 136 return $alias; 137 } 138 139 // Get field of an object (by ID) 140 function get_object_field($id, $name) { 141 $g = $this->cache[$id]; 142 if ($v = $this->fast_vars_array[$name]) { 143 if (!$GLOBALS[$g]->fast_vars_loaded) 144 $this->load_object_id($id, true); 145 return $GLOBALS[$g]->fast_vars[$v]; 146 } 147 else if ($v = $this->slow_vars_array[$name]) { 148 if (!$GLOBALS[$g]->slow_vars_loaded) 149 $this->load_object_id($id, false); 150 return $GLOBALS[$g]->slow_vars[$v]; 151 } 152 else { 153 $this->abstract_error(_T('avis_champ_incorrect_type_objet', array('name' => $name, 'type' => $this->object_class))); 154 } 155 } 156 157 // Set field of an object (by ID) 158 function set_object_field($id, $name, $value) { 159 $g = $this->cache[$id]; 160 if ($v = $this->fast_vars_array[$name]) { 161 if (!$GLOBALS[$g]->fast_vars_loaded) 162 $this->load_object_id($id, true); 163 $GLOBALS[$g]->fast_vars[$v] = $value; 164 $GLOBALS[$g]->dirty = true; 165 } 166 else if ($v = $this->slow_vars_array[$name]) { 167 if (!$GLOBALS[$g]->slow_vars_loaded) 168 $this->load_object_id($id, false); 169 $GLOBALS[$g]->slow_vars[$v] = $value; 170 $GLOBALS[$g]->dirty = true; 171 } 172 else { 173 $this->abstract_error(_T('avis_champ_incorrect_type_objet', array('name' => $name)).$this->object_class); 174 } 175 } 176 177 178 // 179 // Load object by SQL query 180 // 181 function load_object_sql($query, $fast, $multiple = false) { 182 $cols = $this->fast_vars_sql; 183 if (!$fast && $this->slow_vars_sql) { 184 if ($cols) $cols .= ', '; 185 $cols .= $this->slow_vars_sql; 186 } 187 // Replace generic names by actual ones 188 $query = ereg_replace('#cols', $cols, $query); 189 $query = ereg_replace('#table', $this->sql_table, $query); 190 $query = ereg_replace('#id', $this->sql_table.'.'.$this->sql_id, $query); 191 $result = spip_query($query); 192 // If multiple results expected, create a result array 193 if ($multiple) $r = array(); 194 if ($result) while ($row = spip_fetch_array($result)) { 195 $id = $row[$this->sql_id]; 196 $g = $this->create_object_cache_instance($id); 197 // Read fast vars 198 for ($i = 0; $i < $this->nb_fast_vars; $i++) { 199 $var = $this->fast_vars_list[$i]; 200 $GLOBALS[$g]->fast_vars[$var] = $row[$var]; 201 } 202 $GLOBALS[$g]->fast_vars_loaded = true; 203 if (!$fast) { 204 // Read slow vars 205 for ($i = 0; $i < $this->nb_slow_vars; $i++) { 206 $var = $this->slow_vars_list[$i]; 207 $GLOBALS[$g]->slow_vars[$var] = $row[$var]; 208 } 209 $GLOBALS[$g]->slow_vars_loaded = true; 210 } 211 if ($multiple) $r[$id] = $id; 212 else break; 213 } 214 if ($multiple) return $r; 215 } 216 217 // 218 // Load object by ID 219 // 220 function load_object_id($id, $fast = true) { 221 $query = "SELECT #cols FROM #table WHERE #id=$id"; 222 $this->load_object_sql($query, $fast); 223 } 224 225 // 226 // Fetch object only if not in cache 227 // 228 function fetch_object_id($id, $fast = true) { 229 if ($g = $this->cache[$id]) { 230 if (!$GLOBALS[$g]->dirty) return; 231 } 232 else { 233 $g = $this->create_object_cache_instance($id); 234 } 235 $this->load_object_id($id, $fast); 236 } 237 238 // 239 // Create new object 240 // 241 function create_object() { 242 static $new_id = 0; 243 $id = 'new_'.(++$new_id); 244 $g = $this->create_object_cache_instance($id); 245 $GLOBALS[$g]->dirty = true; 246 $GLOBALS[$g]->fast_vars_loaded = true; 247 $GLOBALS[$g]->slow_vars_loaded = true; 248 $this->new_object($id); 249 return $id; 250 } 251 252 // 253 // Main load function : fetch object by generic criterium 254 // 255 function fetch_object($critere, $fast = true) { 256 if ($critere == 'new') { 257 // create object 258 $id = $this->create_object(); 259 } 260 else if ($critere > 0) { 261 // get object by id 262 $id = intval($critere); 263 $this->fetch_object_id($id, $fast); 264 } 265 else { 266 // get object list by sql 267 return $this->load_object_sql($critere, $fast, true); 268 } 269 return $this->create_object_alias($id); 270 } 271 272 // 273 // Main save function : update object by ID 274 // 275 function update_object($id) { 276 $g = $this->cache[$id]; 277 if ($GLOBALS[$g]->dirty) { 278 // generate INSERT query (penser au addslashes) 279 } 280 } 281 } 282 283 284 class _Object extends _Abstract { 285 // Factory ID 286 var $id_factory; 287 288 // Object ID 289 var $id = 0; 290 291 function init_object($id_factory, $id = 0) { 292 $this->id_factory = $id_factory; 293 if ($id) $this->id = $id; 294 } 295 296 function get($var) { 297 return $GLOBALS[$this->id_factory]->get_object_field($this->id, $var); 298 } 299 300 function set($var, $value) { 301 return $GLOBALS[$this->id_factory]->set_object_field($this->id, $var, $value); 302 } 303 304 function commit() { 305 return $GLOBALS[$this->id_factory]->update_object($this->id); 306 } 307 } 308 309 310 // 311 // Create a factory of a given type, and register it 312 // 313 314 function add_factory($type) { 315 global $factories; 316 $class = ucfirst($type).'Factory'; 317 $id_factory = $type.'_factory'; 318 $GLOBALS[$id_factory] = new $class; 319 $GLOBALS[$id_factory]->init_factory($id_factory); 320 return $id_factory; 321 } 322 323 324 325 ?>
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| Généré le : Thu Feb 22 22:27:47 2007 | par Balluche grâce à PHPXref 0.7 |