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285fb262 RB |
1 | <?php |
2 | /*************************************************************************** | |
3 | * Copyright (C) 2003-2010 Polytechnique.org * | |
4 | * http://opensource.polytechnique.org/ * | |
5 | * * | |
6 | * This program is free software; you can redistribute it and/or modify * | |
7 | * it under the terms of the GNU General Public License as published by * | |
8 | * the Free Software Foundation; either version 2 of the License, or * | |
9 | * (at your option) any later version. * | |
10 | * * | |
11 | * This program is distributed in the hope that it will be useful, * | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
14 | * GNU General Public License for more details. * | |
15 | * * | |
16 | * You should have received a copy of the GNU General Public License * | |
17 | * along with this program; if not, write to the Free Software * | |
18 | * Foundation, Inc., * | |
19 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * | |
20 | ***************************************************************************/ | |
21 | ||
857a2b96 FB |
22 | __autoload('xdb'); |
23 | ||
0d78a96b | 24 | // {{{ class PlLimit |
bd9b36fe RB |
25 | class PlLimit |
26 | { | |
27 | private $count = null; | |
28 | private $from = null; | |
29 | ||
30 | public function __construct($count = null, $from = null) | |
31 | { | |
32 | $this->count = $count; | |
33 | $this->from = $from; | |
34 | } | |
35 | ||
36 | public function getSql() | |
37 | { | |
4aa4899b | 38 | if (!is_null($this->count) && $this->count != 0) { |
bd9b36fe RB |
39 | if (!is_null($this->from) && $this->from != 0) { |
40 | return XDB::format('LIMIT {?}, {?}', (int)$this->from, (int)$this->count); | |
41 | } else { | |
42 | return XDB::format('LIMIT {?}', (int)$this->count); | |
43 | } | |
44 | } | |
45 | return ''; | |
46 | } | |
47 | } | |
0d78a96b | 48 | // }}} |
bd9b36fe | 49 | |
0d78a96b | 50 | // {{{ class PlSqlJoin |
285fb262 RB |
51 | class PlSqlJoin |
52 | { | |
53 | private $mode; | |
54 | private $table; | |
55 | private $condition; | |
56 | ||
57 | const MODE_LEFT = 'LEFT'; | |
58 | const MODE_RIGHT = 'RIGHT'; | |
59 | const MODE_INNER = 'INNER'; | |
60 | ||
ae3effcc | 61 | private function __construct($mode, $params) |
285fb262 | 62 | { |
ae3effcc FB |
63 | $table = array_shift($params); |
64 | $condition = call_user_func_array(array('XDB', 'format'), $params); | |
285fb262 | 65 | if ($mode != self::MODE_LEFT && $mode != self::MODE_RIGHT && $mode != self::MODE_INNER) { |
4aa4899b | 66 | Platal::page()->kill("Join mode error: unknown mode $mode"); |
285fb262 RB |
67 | return; |
68 | } | |
69 | $this->mode = $mode; | |
70 | $this->table = $table; | |
71 | $this->condition = $condition; | |
72 | } | |
73 | ||
74 | public function mode() | |
75 | { | |
76 | return $this->mode; | |
77 | } | |
78 | ||
79 | public function table() | |
80 | { | |
81 | return $this->table; | |
82 | } | |
83 | ||
bd9b36fe | 84 | public function condition() |
285fb262 RB |
85 | { |
86 | return $this->condition; | |
87 | } | |
285fb262 | 88 | |
bd9b36fe RB |
89 | /** Replace all "metas" in the condition with their translation. |
90 | * $ME always becomes the alias of the table | |
91 | * @param $key The name the joined table will have in the final query | |
92 | * @param $joinMetas An array of meta => conversion to apply to the condition | |
93 | */ | |
94 | public function replaceJoinMetas($key, $joinMetas = array()) | |
285fb262 | 95 | { |
bd9b36fe RB |
96 | $joinMetas['$ME'] = $key; |
97 | return str_replace(array_keys($joinMetas), $joinMetas, $this->condition); | |
285fb262 RB |
98 | } |
99 | ||
bd9b36fe RB |
100 | /** Create a join command from an array of PlSqlJoin |
101 | * @param $joins The list of 'join' to convert into an SQL query | |
102 | * @param $joinMetas An array of ('$META' => 'conversion') to apply to the joins. | |
103 | */ | |
104 | public static function formatJoins(array $joins, array $joinMetas) | |
285fb262 RB |
105 | { |
106 | $str = ''; | |
107 | foreach ($joins as $key => $join) { | |
4aa4899b | 108 | if (!($join instanceof PlSqlJoin)) { |
bd9b36fe | 109 | Platal::page()->kill("Error: not a join: $join"); |
285fb262 RB |
110 | } |
111 | $mode = $join->mode(); | |
112 | $table = $join->table(); | |
113 | $str .= ' ' . $mode . ' JOIN ' . $table . ' AS ' . $key; | |
114 | if ($join->condition() != null) { | |
bd9b36fe | 115 | $str .= ' ON (' . $join->replaceJoinMetas($key, $joinMetas) . ')'; |
285fb262 RB |
116 | } |
117 | $str .= "\n"; | |
118 | } | |
119 | return $str; | |
120 | } | |
ae3effcc FB |
121 | |
122 | /** Build a left join | |
123 | * @param table The name of the table. | |
124 | * @param condition The condition of the jointure | |
125 | */ | |
126 | public static function left() | |
127 | { | |
128 | $params = func_get_args(); | |
129 | return new PlSqlJoin(self::MODE_LEFT, $params); | |
130 | } | |
131 | ||
132 | /** Build a right join | |
133 | * @param table The name of the table. | |
134 | * @param condition The condition of the jointure | |
135 | */ | |
136 | public static function right() | |
137 | { | |
138 | $params = func_get_args(); | |
139 | return new PlSqlJoin(self::MODE_RIGHT, $params); | |
140 | } | |
141 | ||
142 | /** Build a inner join | |
143 | * @param table The name of the table. | |
144 | * @param condition The condition of the jointure | |
145 | */ | |
146 | public static function inner() | |
147 | { | |
148 | $params = func_get_args(); | |
149 | return new PlSqlJoin(self::MODE_INNER, $params); | |
150 | } | |
bd9b36fe | 151 | } |
0d78a96b | 152 | // }}} |
bd9b36fe | 153 | |
0d78a96b | 154 | // {{{ class PlFilterOrder |
f66f26e2 RB |
155 | abstract class PlFilterOrder |
156 | { | |
157 | protected $desc = false; | |
158 | public function __construct($desc = false) | |
159 | { | |
160 | $this->desc = $desc; | |
161 | } | |
162 | ||
163 | public function toggleDesc() | |
164 | { | |
067a59f4 | 165 | $this->desc = !$this->desc; |
f66f26e2 RB |
166 | } |
167 | ||
168 | public function setDescending($desc = true) | |
169 | { | |
170 | $this->desc = $desc; | |
171 | } | |
172 | ||
173 | public function buildSort(PlFilter &$pf) | |
174 | { | |
175 | $sel = $this->getSortTokens($pf); | |
176 | if (!is_array($sel)) { | |
177 | $sel = array($sel); | |
178 | } | |
179 | if ($this->desc) { | |
180 | foreach ($sel as $k => $s) { | |
181 | $sel[$k] = $s . ' DESC'; | |
182 | } | |
183 | } | |
184 | return $sel; | |
185 | } | |
186 | ||
0d78a96b | 187 | abstract protected function getSortTokens(PlFilter &$pf); |
f66f26e2 | 188 | } |
0d78a96b RB |
189 | // }}} |
190 | ||
191 | // {{{ class PFO_Random | |
192 | class PFO_Random extends PlFilterOrder | |
193 | { | |
194 | private $seed = null; | |
195 | ||
196 | public function __construct($seed = null, $desc = false) | |
197 | { | |
198 | parent::__construct($desc); | |
199 | $this->seed = $seed; | |
200 | } | |
201 | ||
202 | protected function getSortTokens(PlFilter &$pf) | |
203 | { | |
204 | if ($this->seed == null) { | |
205 | return 'RAND()'; | |
206 | } else { | |
207 | return XDB::format('RAND({?})', $this->seed); | |
208 | } | |
209 | } | |
210 | } | |
211 | // }}} | |
f66f26e2 RB |
212 | |
213 | // {{{ interface PlFilterCondition | |
214 | interface PlFilterCondition | |
215 | { | |
216 | const COND_TRUE = 'TRUE'; | |
217 | const COND_FALSE = 'FALSE'; | |
218 | ||
219 | public function buildCondition(PlFilter &$pf); | |
220 | } | |
221 | // }}} | |
222 | ||
223 | // {{{ class PFC_OneChild | |
224 | abstract class PFC_OneChild implements PlFilterCondition | |
225 | { | |
226 | protected $child; | |
227 | ||
228 | public function __construct(&$child = null) | |
229 | { | |
230 | if (!is_null($child) && ($child instanceof PlFilterCondition)) { | |
231 | $this->setChild($child); | |
232 | } | |
233 | } | |
234 | ||
235 | public function setChild(PlFilterCondition &$cond) | |
236 | { | |
237 | $this->child =& $cond; | |
238 | } | |
239 | } | |
240 | // }}} | |
241 | ||
242 | // {{{ class PFC_NChildren | |
243 | abstract class PFC_NChildren implements PlFilterCondition | |
244 | { | |
245 | protected $children = array(); | |
246 | ||
247 | public function __construct() | |
248 | { | |
bf0ebb51 FB |
249 | $this->addChildren(pl_flatten(func_get_args())); |
250 | } | |
251 | ||
252 | public function addChildren(array $conds) | |
253 | { | |
254 | foreach ($conds as &$cond) { | |
255 | if (!is_null($cond) && ($cond instanceof PlFilterCondition)) { | |
256 | $this->addChild($cond); | |
f66f26e2 RB |
257 | } |
258 | } | |
259 | } | |
260 | ||
261 | public function addChild(PlFilterCondition &$cond) | |
262 | { | |
263 | $this->children[] =& $cond; | |
264 | } | |
265 | ||
266 | protected function catConds(array $cond, $op, $fallback) | |
267 | { | |
268 | if (count($cond) == 0) { | |
269 | return $fallback; | |
270 | } else if (count($cond) == 1) { | |
271 | return $cond[0]; | |
272 | } else { | |
273 | return '(' . implode(') ' . $op . ' (', $cond) . ')'; | |
274 | } | |
275 | } | |
276 | } | |
277 | // }}} | |
278 | ||
279 | // {{{ class PFC_True | |
280 | class PFC_True implements PlFilterCondition | |
281 | { | |
282 | public function buildCondition(PlFilter &$uf) | |
283 | { | |
284 | return self::COND_TRUE; | |
285 | } | |
286 | } | |
287 | // }}} | |
288 | ||
289 | // {{{ class PFC_False | |
290 | class PFC_False implements PlFilterCondition | |
291 | { | |
292 | public function buildCondition(PlFilter &$uf) | |
293 | { | |
294 | return self::COND_FALSE; | |
295 | } | |
296 | } | |
297 | // }}} | |
298 | ||
299 | // {{{ class PFC_Not | |
300 | class PFC_Not extends PFC_OneChild | |
301 | { | |
302 | public function buildCondition(PlFilter &$uf) | |
303 | { | |
304 | $val = $this->child->buildCondition($uf); | |
305 | if ($val == self::COND_TRUE) { | |
306 | return self::COND_FALSE; | |
307 | } else if ($val == self::COND_FALSE) { | |
308 | return self::COND_TRUE; | |
309 | } else { | |
310 | return 'NOT (' . $val . ')'; | |
311 | } | |
312 | } | |
313 | } | |
314 | // }}} | |
315 | ||
316 | // {{{ class PFC_And | |
317 | class PFC_And extends PFC_NChildren | |
318 | { | |
319 | public function buildCondition(PlFilter &$uf) | |
320 | { | |
321 | if (empty($this->children)) { | |
322 | return self::COND_FALSE; | |
323 | } else { | |
324 | $true = self::COND_FALSE; | |
325 | $conds = array(); | |
326 | foreach ($this->children as &$child) { | |
327 | $val = $child->buildCondition($uf); | |
328 | if ($val == self::COND_TRUE) { | |
329 | $true = self::COND_TRUE; | |
330 | } else if ($val == self::COND_FALSE) { | |
331 | return self::COND_FALSE; | |
332 | } else { | |
333 | $conds[] = $val; | |
334 | } | |
335 | } | |
336 | return $this->catConds($conds, 'AND', $true); | |
337 | } | |
338 | } | |
339 | } | |
340 | // }}} | |
341 | ||
342 | // {{{ class PFC_Or | |
343 | class PFC_Or extends PFC_NChildren | |
344 | { | |
345 | public function buildCondition(PlFilter &$uf) | |
346 | { | |
347 | if (empty($this->children)) { | |
348 | return self::COND_TRUE; | |
349 | } else { | |
350 | $true = self::COND_TRUE; | |
351 | $conds = array(); | |
352 | foreach ($this->children as &$child) { | |
353 | $val = $child->buildCondition($uf); | |
354 | if ($val == self::COND_TRUE) { | |
355 | return self::COND_TRUE; | |
356 | } else if ($val == self::COND_FALSE) { | |
357 | $true = self::COND_FALSE; | |
358 | } else { | |
359 | $conds[] = $val; | |
360 | } | |
361 | } | |
362 | return $this->catConds($conds, 'OR', $true); | |
363 | } | |
364 | } | |
365 | } | |
366 | // }}} | |
367 | ||
0d78a96b | 368 | // {{{ class PlFilter |
bd9b36fe RB |
369 | abstract class PlFilter |
370 | { | |
371 | /** Filters objects matching the PlFilter | |
372 | * @param $objects The objects to filter | |
373 | * @param $limit The portion of the matching objects to show | |
374 | */ | |
e1746810 | 375 | public abstract function filter(array $objects, $limit = null); |
bd9b36fe RB |
376 | |
377 | public abstract function setCondition(PlFilterCondition &$cond); | |
378 | ||
379 | public abstract function addSort(PlFilterOrder &$sort); | |
380 | ||
381 | public abstract function getTotalCount(); | |
382 | ||
383 | /** Get objects, selecting only those within a limit | |
384 | * @param $limit The portion of the matching objects to select | |
385 | */ | |
e1746810 | 386 | public abstract function get($limit = null); |
bd9b36fe RB |
387 | |
388 | /** PRIVATE FUNCTIONS | |
389 | */ | |
390 | ||
391 | /** List of metas to replace in joins: | |
392 | * '$COIN' => 'pan.x' means 'replace $COIN with pan.x in the condition of the joins' | |
393 | * | |
394 | * "$ME" => "joined table alias" is always added to these. | |
395 | */ | |
9a122520 RB |
396 | protected $joinMetas = array(); |
397 | ||
398 | protected $joinMethods = array(); | |
285fb262 | 399 | |
bd9b36fe RB |
400 | /** Build the 'join' part of the query |
401 | * This function will call all methods declared in self::$joinMethods | |
402 | * to get an array of PlSqlJoin objects to merge | |
403 | */ | |
9a122520 | 404 | protected function buildJoins() |
285fb262 RB |
405 | { |
406 | $joins = array(); | |
9a122520 | 407 | foreach ($this->joinMethods as $method) { |
285fb262 RB |
408 | $joins = array_merge($joins, $this->$method()); |
409 | } | |
9a122520 | 410 | return PlSqlJoin::formatJoins($joins, $this->joinMetas); |
285fb262 RB |
411 | } |
412 | ||
413 | } | |
0d78a96b | 414 | // }}} |
285fb262 | 415 | |
ae3effcc | 416 | // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: |
285fb262 | 417 | ?> |