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1 | <?php |
2 | /* | |
3 | +--------------------------------------------------------------------+ | |
232624b1 | 4 | | CiviCRM version 4.4 | |
6a488035 TO |
5 | +--------------------------------------------------------------------+ |
6 | | Copyright CiviCRM LLC (c) 2004-2013 | | |
7 | +--------------------------------------------------------------------+ | |
8 | | This file is a part of CiviCRM. | | |
9 | | | | |
10 | | CiviCRM is free software; you can copy, modify, and distribute it | | |
11 | | under the terms of the GNU Affero General Public License | | |
12 | | Version 3, 19 November 2007 and the CiviCRM Licensing Exception. | | |
13 | | | | |
14 | | CiviCRM is distributed in the hope that it will be useful, but | | |
15 | | WITHOUT ANY WARRANTY; without even the implied warranty of | | |
16 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | | |
17 | | See the GNU Affero General Public License for more details. | | |
18 | | | | |
19 | | You should have received a copy of the GNU Affero General Public | | |
20 | | License and the CiviCRM Licensing Exception along | | |
21 | | with this program; if not, contact CiviCRM LLC | | |
22 | | at info[AT]civicrm[DOT]org. If you have questions about the | | |
23 | | GNU Affero General Public License or the licensing of CiviCRM, | | |
24 | | see the CiviCRM license FAQ at http://civicrm.org/licensing | | |
25 | +--------------------------------------------------------------------+ | |
26 | */ | |
27 | ||
28 | /** | |
29 | * | |
30 | * @package CRM | |
31 | * @copyright CiviCRM LLC (c) 2004-2013 | |
32 | * $Id$ | |
33 | * | |
34 | */ | |
35 | ||
36 | /** | |
37 | * Core StateMachine. All statemachines subclass for the core one | |
38 | * for functionality specific to their needs. | |
39 | * | |
40 | * A statemachine keeps track of differnt states and forms for a | |
41 | * html quickform controller. | |
42 | * | |
43 | */ | |
44 | class CRM_Core_StateMachine { | |
45 | ||
46 | /** | |
47 | * the controller of this state machine | |
48 | * @var object | |
49 | */ | |
50 | protected $_controller; | |
51 | ||
52 | /** | |
53 | * the list of states that belong to this state machine | |
54 | * @var array | |
55 | */ | |
56 | protected $_states; | |
57 | ||
58 | /** | |
59 | * the list of pages that belong to this state machine. Note | |
60 | * that a state and a form have a 1 <-> 1 relationship. so u | |
61 | * can always derive one from the other | |
62 | * @var array | |
63 | */ | |
64 | protected $_pages; | |
65 | ||
66 | /** | |
67 | * The names of the pages | |
68 | * | |
69 | * @var array | |
70 | */ | |
71 | protected $_pageNames; | |
72 | ||
73 | /** | |
74 | * the mode that the state machine is operating in | |
75 | * @var int | |
76 | */ | |
77 | protected $_action = NULL; | |
78 | ||
79 | /** | |
80 | * The display name for this machine | |
81 | * @var string | |
82 | */ | |
83 | protected $_name = NULL; | |
84 | ||
85 | /** | |
86 | * class constructor | |
87 | * | |
88 | * @param object $controller the controller for this state machine | |
89 | * | |
90 | * @return object | |
91 | * @access public | |
92 | */ | |
93 | function __construct(&$controller, $action = CRM_Core_Action::NONE) { | |
94 | $this->_controller = &$controller; | |
95 | $this->_action = $action; | |
96 | ||
97 | $this->_states = array(); | |
98 | } | |
99 | ||
100 | /** | |
101 | * getter for name | |
102 | * | |
103 | * @return string | |
104 | * @access public | |
105 | */ | |
106 | public function getName() { | |
107 | return $this->_name; | |
108 | } | |
109 | ||
110 | /** | |
111 | * setter for name | |
112 | * | |
113 | * @param string | |
114 | * | |
115 | * @return void | |
116 | * @access public | |
117 | */ | |
118 | public function setName($name) { | |
119 | $this->_name = $name; | |
120 | } | |
121 | ||
122 | /** | |
123 | * do a state transition jump. Currently only supported types are | |
124 | * Next and Back. The other actions (Cancel, Done, Submit etc) do | |
125 | * not need the state machine to figure out where to go | |
126 | * | |
127 | * @param object $page CRM_Core_Form the current form-page | |
128 | * @param string $actionName Current action name, as one Action object can serve multiple actions | |
129 | * @param string $type The type of transition being requested (Next or Back) | |
130 | * | |
131 | * @return void | |
132 | * @access public | |
133 | */ | |
134 | function perform(&$page, $actionName, $type = 'Next') { | |
135 | // save the form values and validation status to the session | |
136 | $page->isFormBuilt() or $page->buildForm(); | |
137 | ||
138 | $pageName = $page->getAttribute('name'); | |
139 | $data = &$page->controller->container(); | |
140 | ||
141 | $data['values'][$pageName] = $page->exportValues(); | |
142 | $data['valid'][$pageName] = $page->validate(); | |
143 | ||
144 | // if we are going to the next state | |
145 | // Modal form and page is invalid: don't go further | |
146 | if ($type == 'Next' && !$data['valid'][$pageName]) { | |
147 | return $page->handle('display'); | |
148 | } | |
149 | ||
150 | $state = &$this->_states[$pageName]; | |
151 | ||
152 | // dont know how or why we landed here so abort and display | |
153 | // current page | |
154 | if (empty($state)) { | |
155 | return $page->handle('display'); | |
156 | } | |
157 | ||
158 | // the page is valid, process it if we are jumping to the next state | |
159 | if ($type == 'Next') { | |
160 | $page->mainProcess(); | |
161 | // we get the state again, since postProcess might have changed it | |
162 | // this bug took me forever to find :) Lobo | |
163 | $state = &$this->_states[$pageName]; | |
164 | $state->handleNextState($page); | |
165 | } | |
166 | else { | |
167 | $state->handleBackState($page); | |
168 | } | |
169 | } | |
170 | ||
171 | /** | |
172 | * helper function to add a State to the state machine | |
173 | * | |
174 | * @param string $name the internal name | |
175 | * @param int $type the type of state (START|FINISH|SIMPLE) | |
176 | * @param object $prev the previous page if any | |
177 | * @param object $next the next page if any | |
178 | * | |
179 | * @return void | |
180 | * @access public | |
181 | */ | |
182 | function addState($name, $type, $prev, $next) { | |
183 | $this->_states[$name] = new CRM_Core_State($name, $type, $prev, $next, $this); | |
184 | } | |
185 | ||
186 | /** | |
187 | * Given a name find the corresponding state | |
188 | * | |
189 | * @param string $name the state name | |
190 | * | |
191 | * @return object the state object | |
192 | * @access public | |
193 | */ | |
194 | function find($name) { | |
195 | if (array_key_exists($name, $this->_states)) { | |
196 | return $this->_states[$name]; | |
197 | } | |
198 | else { | |
199 | return NULL; | |
200 | } | |
201 | } | |
202 | ||
203 | /** | |
204 | * return the list of state objects | |
205 | * | |
206 | * @return array array of states in the state machine | |
207 | * @access public | |
208 | */ | |
209 | function getStates() { | |
210 | return $this->_states; | |
211 | } | |
212 | ||
213 | /** | |
214 | * return the state object corresponding to the name | |
215 | * | |
216 | * @param string $name name of page | |
217 | * | |
218 | * @return CRM_Core_State state object matching the name | |
219 | * @access public | |
220 | */ | |
221 | function &getState($name) { | |
222 | if (isset($this->_states[$name])) { | |
223 | return $this->_states[$name]; | |
224 | } | |
225 | ||
226 | /* | |
227 | * This is a gross hack for ajax driven requests where | |
228 | * we change the form name to allow multiple edits to happen | |
229 | * We need a cleaner way of doing this going forward | |
230 | */ | |
231 | foreach ($this->_states as $n => $s ) { | |
232 | if (substr($name, 0, strlen($n)) == $n) { | |
233 | return $s; | |
234 | } | |
235 | } | |
236 | ||
237 | return null; | |
238 | } | |
239 | ||
240 | /** | |
241 | * return the list of form objects | |
242 | * | |
243 | * @return array array of pages in the state machine | |
244 | * @access public | |
245 | */ | |
246 | function getPages() { | |
247 | return $this->_pages; | |
248 | } | |
249 | ||
250 | /** | |
251 | * addSequentialStates: meta level function to create a simple | |
252 | * wizard for a state machine that is completely sequential. | |
253 | * | |
254 | * @access public | |
255 | * | |
256 | * @param array $states states is an array of arrays. Each element | |
257 | * of the top level array describes a state. Each state description | |
258 | * includes the name, the display name and the class name | |
259 | * | |
260 | * @param array $pages (reference ) the array of page objects | |
261 | * | |
262 | * @return void | |
263 | */ | |
264 | function addSequentialPages(&$pages) { | |
265 | $this->_pages = &$pages; | |
266 | $numPages = count($pages); | |
267 | ||
268 | $this->_pageNames = array(); | |
269 | foreach ($pages as $tempName => $value) { | |
270 | if (CRM_Utils_Array::value('className', $value)) { | |
271 | $this->_pageNames[] = $tempName; | |
272 | } | |
273 | else { | |
274 | $this->_pageNames[] = CRM_Utils_String::getClassName($tempName); | |
275 | } | |
276 | } | |
277 | ||
278 | $i = 0; | |
279 | foreach ($pages as $tempName => $value) { | |
280 | $name = $this->_pageNames[$i]; | |
281 | ||
282 | $className = CRM_Utils_Array::value('className', | |
283 | $value, | |
284 | $tempName | |
285 | ); | |
286 | $classPath = str_replace('_', '/', $className) . '.php'; | |
287 | if ($numPages == 1) { | |
288 | $prev = $next = NULL; | |
289 | $type = CRM_Core_State::START | CRM_Core_State::FINISH; | |
290 | } | |
291 | elseif ($i == 0) { | |
292 | // start state | |
293 | $prev = NULL; | |
294 | $next = $this->_pageNames[$i + 1]; | |
295 | $type = CRM_Core_State::START; | |
296 | } | |
297 | elseif ($i == $numPages - 1) { | |
298 | // finish state | |
299 | $prev = $this->_pageNames[$i - 1]; | |
300 | $next = NULL; | |
301 | $type = CRM_Core_State::FINISH; | |
302 | } | |
303 | else { | |
304 | // in between simple state | |
305 | $prev = $this->_pageNames[$i - 1]; | |
306 | $next = $this->_pageNames[$i + 1]; | |
307 | $type = CRM_Core_State::SIMPLE; | |
308 | } | |
309 | ||
310 | $this->addState($name, $type, $prev, $next); | |
311 | ||
312 | $i++; | |
313 | } | |
314 | } | |
315 | ||
316 | /** | |
317 | * reset the state machine | |
318 | * | |
319 | * @return void | |
320 | * @access public | |
321 | */ | |
322 | function reset() { | |
323 | $this->_controller->reset(); | |
324 | } | |
325 | ||
326 | /** | |
327 | * getter for action | |
328 | * | |
329 | * @return int | |
330 | * @access public | |
331 | */ | |
332 | function getAction() { | |
333 | return $this->_action; | |
334 | } | |
335 | ||
336 | /** | |
337 | * setter for content | |
338 | * | |
339 | * @param string $content the content generated by this state machine | |
340 | * | |
341 | * @return void | |
342 | * @access public | |
343 | */ | |
344 | function setContent(&$content) { | |
345 | $this->_controller->setContent($content); | |
346 | } | |
347 | ||
348 | /** | |
349 | * getter for content | |
350 | * | |
351 | * @return string | |
352 | * @access public | |
353 | */ | |
354 | function &getContent() { | |
355 | return $this->_controller->getContent(); | |
356 | } | |
357 | ||
358 | function getDestination() { | |
359 | return $this->_controller->getDestination(); | |
360 | } | |
361 | ||
362 | function getSkipRedirection() { | |
363 | return $this->_controller->getSkipRedirection(); | |
364 | } | |
365 | ||
366 | function fini() { | |
367 | return $this->_controller->fini(); | |
368 | } | |
369 | ||
370 | function cancelAction() { | |
371 | return $this->_controller->cancelAction(); | |
372 | } | |
373 | ||
374 | /** | |
375 | * Should the controller reset the session | |
376 | * In some cases, specifically search we want to remember | |
377 | * state across various actions and want to go back to the | |
378 | * beginning from the final state, but retain the same session | |
379 | * values | |
380 | * | |
381 | * @return boolean | |
382 | */ | |
383 | function shouldReset() { | |
384 | return TRUE; | |
385 | } | |
386 | ||
387 | } | |
388 |