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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 | ||
0d78a96b | 22 | // {{{ class PlLimit |
bd9b36fe RB |
23 | class PlLimit |
24 | { | |
25 | private $count = null; | |
26 | private $from = null; | |
27 | ||
28 | public function __construct($count = null, $from = null) | |
29 | { | |
30 | $this->count = $count; | |
31 | $this->from = $from; | |
32 | } | |
33 | ||
34 | public function getSql() | |
35 | { | |
4aa4899b | 36 | if (!is_null($this->count) && $this->count != 0) { |
bd9b36fe RB |
37 | if (!is_null($this->from) && $this->from != 0) { |
38 | return XDB::format('LIMIT {?}, {?}', (int)$this->from, (int)$this->count); | |
39 | } else { | |
40 | return XDB::format('LIMIT {?}', (int)$this->count); | |
41 | } | |
42 | } | |
43 | return ''; | |
44 | } | |
45 | } | |
0d78a96b | 46 | // }}} |
bd9b36fe | 47 | |
0d78a96b | 48 | // {{{ class PlSqlJoin |
285fb262 RB |
49 | class PlSqlJoin |
50 | { | |
51 | private $mode; | |
52 | private $table; | |
53 | private $condition; | |
54 | ||
55 | const MODE_LEFT = 'LEFT'; | |
56 | const MODE_RIGHT = 'RIGHT'; | |
57 | const MODE_INNER = 'INNER'; | |
58 | ||
59 | public function __construct($mode, $table, $condition) | |
60 | { | |
61 | if ($mode != self::MODE_LEFT && $mode != self::MODE_RIGHT && $mode != self::MODE_INNER) { | |
4aa4899b | 62 | Platal::page()->kill("Join mode error: unknown mode $mode"); |
285fb262 RB |
63 | return; |
64 | } | |
65 | $this->mode = $mode; | |
66 | $this->table = $table; | |
67 | $this->condition = $condition; | |
68 | } | |
69 | ||
70 | public function mode() | |
71 | { | |
72 | return $this->mode; | |
73 | } | |
74 | ||
75 | public function table() | |
76 | { | |
77 | return $this->table; | |
78 | } | |
79 | ||
bd9b36fe | 80 | public function condition() |
285fb262 RB |
81 | { |
82 | return $this->condition; | |
83 | } | |
285fb262 | 84 | |
bd9b36fe RB |
85 | /** Replace all "metas" in the condition with their translation. |
86 | * $ME always becomes the alias of the table | |
87 | * @param $key The name the joined table will have in the final query | |
88 | * @param $joinMetas An array of meta => conversion to apply to the condition | |
89 | */ | |
90 | public function replaceJoinMetas($key, $joinMetas = array()) | |
285fb262 | 91 | { |
bd9b36fe RB |
92 | $joinMetas['$ME'] = $key; |
93 | return str_replace(array_keys($joinMetas), $joinMetas, $this->condition); | |
285fb262 RB |
94 | } |
95 | ||
bd9b36fe RB |
96 | /** Create a join command from an array of PlSqlJoin |
97 | * @param $joins The list of 'join' to convert into an SQL query | |
98 | * @param $joinMetas An array of ('$META' => 'conversion') to apply to the joins. | |
99 | */ | |
100 | public static function formatJoins(array $joins, array $joinMetas) | |
285fb262 RB |
101 | { |
102 | $str = ''; | |
103 | foreach ($joins as $key => $join) { | |
4aa4899b | 104 | if (!($join instanceof PlSqlJoin)) { |
bd9b36fe | 105 | Platal::page()->kill("Error: not a join: $join"); |
285fb262 RB |
106 | } |
107 | $mode = $join->mode(); | |
108 | $table = $join->table(); | |
109 | $str .= ' ' . $mode . ' JOIN ' . $table . ' AS ' . $key; | |
110 | if ($join->condition() != null) { | |
bd9b36fe | 111 | $str .= ' ON (' . $join->replaceJoinMetas($key, $joinMetas) . ')'; |
285fb262 RB |
112 | } |
113 | $str .= "\n"; | |
114 | } | |
115 | return $str; | |
116 | } | |
bd9b36fe | 117 | } |
0d78a96b | 118 | // }}} |
bd9b36fe | 119 | |
0d78a96b | 120 | // {{{ class PlFilterOrder |
f66f26e2 RB |
121 | abstract class PlFilterOrder |
122 | { | |
123 | protected $desc = false; | |
124 | public function __construct($desc = false) | |
125 | { | |
126 | $this->desc = $desc; | |
127 | } | |
128 | ||
129 | public function toggleDesc() | |
130 | { | |
131 | $this->desc = !$desc; | |
132 | } | |
133 | ||
134 | public function setDescending($desc = true) | |
135 | { | |
136 | $this->desc = $desc; | |
137 | } | |
138 | ||
139 | public function buildSort(PlFilter &$pf) | |
140 | { | |
141 | $sel = $this->getSortTokens($pf); | |
142 | if (!is_array($sel)) { | |
143 | $sel = array($sel); | |
144 | } | |
145 | if ($this->desc) { | |
146 | foreach ($sel as $k => $s) { | |
147 | $sel[$k] = $s . ' DESC'; | |
148 | } | |
149 | } | |
150 | return $sel; | |
151 | } | |
152 | ||
0d78a96b | 153 | abstract protected function getSortTokens(PlFilter &$pf); |
f66f26e2 | 154 | } |
0d78a96b RB |
155 | // }}} |
156 | ||
157 | // {{{ class PFO_Random | |
158 | class PFO_Random extends PlFilterOrder | |
159 | { | |
160 | private $seed = null; | |
161 | ||
162 | public function __construct($seed = null, $desc = false) | |
163 | { | |
164 | parent::__construct($desc); | |
165 | $this->seed = $seed; | |
166 | } | |
167 | ||
168 | protected function getSortTokens(PlFilter &$pf) | |
169 | { | |
170 | if ($this->seed == null) { | |
171 | return 'RAND()'; | |
172 | } else { | |
173 | return XDB::format('RAND({?})', $this->seed); | |
174 | } | |
175 | } | |
176 | } | |
177 | // }}} | |
f66f26e2 RB |
178 | |
179 | // {{{ interface PlFilterCondition | |
180 | interface PlFilterCondition | |
181 | { | |
182 | const COND_TRUE = 'TRUE'; | |
183 | const COND_FALSE = 'FALSE'; | |
184 | ||
185 | public function buildCondition(PlFilter &$pf); | |
186 | } | |
187 | // }}} | |
188 | ||
189 | // {{{ class PFC_OneChild | |
190 | abstract class PFC_OneChild implements PlFilterCondition | |
191 | { | |
192 | protected $child; | |
193 | ||
194 | public function __construct(&$child = null) | |
195 | { | |
196 | if (!is_null($child) && ($child instanceof PlFilterCondition)) { | |
197 | $this->setChild($child); | |
198 | } | |
199 | } | |
200 | ||
201 | public function setChild(PlFilterCondition &$cond) | |
202 | { | |
203 | $this->child =& $cond; | |
204 | } | |
205 | } | |
206 | // }}} | |
207 | ||
208 | // {{{ class PFC_NChildren | |
209 | abstract class PFC_NChildren implements PlFilterCondition | |
210 | { | |
211 | protected $children = array(); | |
212 | ||
213 | public function __construct() | |
214 | { | |
215 | $children = func_get_args(); | |
216 | foreach ($children as &$child) { | |
217 | if (!is_null($child) && ($child instanceof PlFilterCondition)) { | |
218 | $this->addChild($child); | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
223 | public function addChild(PlFilterCondition &$cond) | |
224 | { | |
225 | $this->children[] =& $cond; | |
226 | } | |
227 | ||
228 | protected function catConds(array $cond, $op, $fallback) | |
229 | { | |
230 | if (count($cond) == 0) { | |
231 | return $fallback; | |
232 | } else if (count($cond) == 1) { | |
233 | return $cond[0]; | |
234 | } else { | |
235 | return '(' . implode(') ' . $op . ' (', $cond) . ')'; | |
236 | } | |
237 | } | |
238 | } | |
239 | // }}} | |
240 | ||
241 | // {{{ class PFC_True | |
242 | class PFC_True implements PlFilterCondition | |
243 | { | |
244 | public function buildCondition(PlFilter &$uf) | |
245 | { | |
246 | return self::COND_TRUE; | |
247 | } | |
248 | } | |
249 | // }}} | |
250 | ||
251 | // {{{ class PFC_False | |
252 | class PFC_False implements PlFilterCondition | |
253 | { | |
254 | public function buildCondition(PlFilter &$uf) | |
255 | { | |
256 | return self::COND_FALSE; | |
257 | } | |
258 | } | |
259 | // }}} | |
260 | ||
261 | // {{{ class PFC_Not | |
262 | class PFC_Not extends PFC_OneChild | |
263 | { | |
264 | public function buildCondition(PlFilter &$uf) | |
265 | { | |
266 | $val = $this->child->buildCondition($uf); | |
267 | if ($val == self::COND_TRUE) { | |
268 | return self::COND_FALSE; | |
269 | } else if ($val == self::COND_FALSE) { | |
270 | return self::COND_TRUE; | |
271 | } else { | |
272 | return 'NOT (' . $val . ')'; | |
273 | } | |
274 | } | |
275 | } | |
276 | // }}} | |
277 | ||
278 | // {{{ class PFC_And | |
279 | class PFC_And extends PFC_NChildren | |
280 | { | |
281 | public function buildCondition(PlFilter &$uf) | |
282 | { | |
283 | if (empty($this->children)) { | |
284 | return self::COND_FALSE; | |
285 | } else { | |
286 | $true = self::COND_FALSE; | |
287 | $conds = array(); | |
288 | foreach ($this->children as &$child) { | |
289 | $val = $child->buildCondition($uf); | |
290 | if ($val == self::COND_TRUE) { | |
291 | $true = self::COND_TRUE; | |
292 | } else if ($val == self::COND_FALSE) { | |
293 | return self::COND_FALSE; | |
294 | } else { | |
295 | $conds[] = $val; | |
296 | } | |
297 | } | |
298 | return $this->catConds($conds, 'AND', $true); | |
299 | } | |
300 | } | |
301 | } | |
302 | // }}} | |
303 | ||
304 | // {{{ class PFC_Or | |
305 | class PFC_Or extends PFC_NChildren | |
306 | { | |
307 | public function buildCondition(PlFilter &$uf) | |
308 | { | |
309 | if (empty($this->children)) { | |
310 | return self::COND_TRUE; | |
311 | } else { | |
312 | $true = self::COND_TRUE; | |
313 | $conds = array(); | |
314 | foreach ($this->children as &$child) { | |
315 | $val = $child->buildCondition($uf); | |
316 | if ($val == self::COND_TRUE) { | |
317 | return self::COND_TRUE; | |
318 | } else if ($val == self::COND_FALSE) { | |
319 | $true = self::COND_FALSE; | |
320 | } else { | |
321 | $conds[] = $val; | |
322 | } | |
323 | } | |
324 | return $this->catConds($conds, 'OR', $true); | |
325 | } | |
326 | } | |
327 | } | |
328 | // }}} | |
329 | ||
0d78a96b | 330 | // {{{ class PlFilter |
bd9b36fe RB |
331 | abstract class PlFilter |
332 | { | |
333 | /** Filters objects matching the PlFilter | |
334 | * @param $objects The objects to filter | |
335 | * @param $limit The portion of the matching objects to show | |
336 | */ | |
e1746810 | 337 | public abstract function filter(array $objects, $limit = null); |
bd9b36fe RB |
338 | |
339 | public abstract function setCondition(PlFilterCondition &$cond); | |
340 | ||
341 | public abstract function addSort(PlFilterOrder &$sort); | |
342 | ||
343 | public abstract function getTotalCount(); | |
344 | ||
345 | /** Get objects, selecting only those within a limit | |
346 | * @param $limit The portion of the matching objects to select | |
347 | */ | |
e1746810 | 348 | public abstract function get($limit = null); |
bd9b36fe RB |
349 | |
350 | /** PRIVATE FUNCTIONS | |
351 | */ | |
352 | ||
353 | /** List of metas to replace in joins: | |
354 | * '$COIN' => 'pan.x' means 'replace $COIN with pan.x in the condition of the joins' | |
355 | * | |
356 | * "$ME" => "joined table alias" is always added to these. | |
357 | */ | |
9a122520 RB |
358 | protected $joinMetas = array(); |
359 | ||
360 | protected $joinMethods = array(); | |
285fb262 | 361 | |
bd9b36fe RB |
362 | /** Build the 'join' part of the query |
363 | * This function will call all methods declared in self::$joinMethods | |
364 | * to get an array of PlSqlJoin objects to merge | |
365 | */ | |
9a122520 | 366 | protected function buildJoins() |
285fb262 RB |
367 | { |
368 | $joins = array(); | |
9a122520 | 369 | foreach ($this->joinMethods as $method) { |
285fb262 RB |
370 | $joins = array_merge($joins, $this->$method()); |
371 | } | |
9a122520 | 372 | return PlSqlJoin::formatJoins($joins, $this->joinMetas); |
285fb262 RB |
373 | } |
374 | ||
375 | } | |
0d78a96b | 376 | // }}} |
285fb262 RB |
377 | |
378 | ?> |