summaryrefslogtreecommitdiff
path: root/framework/Web/Services/TPageService.php
blob: be865d89ffbecab05b9bb6efbe986bdfb7a081ae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
<?php
/**
 * TPageService class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005-2014 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @package Prado\Web\Services
 */

namespace Prado\Web\Services;
use Prado\Prado;
use Prado\Exceptions\TConfigurationException;
use Prado\Exceptions\THttpException;
use Prado\Exceptions\TInvalidOperationException;
use Prado\TApplication;
use Prado\TApplicationMode;
use Prado\Web\UI\TTemplateManager;
use Prado\Web\UI\TThemeManager;

/**
 * TPageService class.
 *
 * TPageService implements the service for serving user page requests.
 *
 * Pages that are available to client users are stored under a directory specified by
 * {@link setBasePath BasePath}. The directory may contain subdirectories.
 * Pages serving for a similar goal are usually placed under the same directory.
 * A directory may contain a configuration file <b>config.xml</b> whose content
 * is similar to that of application configuration file.
 *
 * A page is requested via page path, which is a dot-connected directory names
 * appended by the page name. Assume '<BasePath>/Users/Admin' is the directory
 * containing the page 'Update'. Then the page can be requested via 'Users.Admin.Update'.
 * By default, the {@link setBasePath BasePath} of the page service is the "pages"
 * directory under the application base path. You may change this default
 * by setting {@link setBasePath BasePath} with a different path you prefer.
 *
 * Page name refers to the file name (without extension) of the page template.
 * In order to differentiate from the common control template files, the extension
 * name of the page template files must be '.page'. If there is a PHP file with
 * the same page name under the same directory as the template file, that file
 * will be considered as the page class file and the file name is the page class name.
 * If such a file is not found, the page class is assumed as {@link TPage}.
 *
 * Modules can be configured and loaded in page directory configurations.
 * Configuration of a module in a subdirectory will overwrite its parent
 * directory's configuration, if both configurations refer to the same module.
 *
 * By default, TPageService will automatically load two modules:
 * - {@link TTemplateManager} : manages page and control templates
 * - {@link TThemeManager} : manages themes used in a Prado application
 *
 * In page directory configurations, static authorization rules can also be specified,
 * which governs who and which roles can access particular pages.
 * Refer to {@link TAuthorizationRule} for more details about authorization rules.
 * Page authorization rules can be configured within an <authorization> tag in
 * each page directory configuration as follows,
 * <authorization>
 *   <deny pages="Update" users="?" />
 *   <allow pages="Admin" roles="administrator" />
 *   <deny pages="Admin" users="*" />
 * </authorization>
 * where the 'pages' attribute may be filled with a sequence of comma-separated
 * page IDs. If 'pages' attribute does not appear in a rule, the rule will be
 * applied to all pages in this directory and all subdirectories (recursively).
 * Application of authorization rules are in a bottom-up fashion, starting from
 * the directory containing the requested page up to all parent directories.
 * The first matching rule will be used. The last rule always allows all users
 * accessing to any resources.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @author Carl G. Mathisen <carlgmathisen@gmail.com>
 * @package Prado\Web\Services
 * @since 3.0
 */
class TPageService extends \Prado\TService
{
	/**
	 * Configuration file name
	 */
	const CONFIG_FILE_XML='config.xml';
	/**
	 * Configuration file name
	 */
	const CONFIG_FILE_PHP='config.php';
	/**
	 * Default base path
	 */
	const DEFAULT_BASEPATH='Pages';
	/**
	 * Fallback base path - used to be the default up to Prado < 3.2
	 */
	const FALLBACK_BASEPATH='pages';
	/**
	 * Prefix of ID used for storing parsed configuration in cache
	 */
	const CONFIG_CACHE_PREFIX='prado:pageservice:';
	/**
	 * Page template file extension
	 */
	const PAGE_FILE_EXT='.page';
	/**
	 * @var string root path of pages
	 */
	private $_basePath=null;
	/**
	 * @var string base path class in namespace format
	 */
	private $_basePageClass='TPage';
	/**
	 * @var string clientscript manager class in namespace format
	 * @since 3.1.7
	 */
	private $_clientScriptManagerClass='\Prado\Web\UI\TClientScriptManager';
	/**
	 * @var string default page
	 */
	private $_defaultPage='Home';
	/**
	 * @var string requested page (path)
	 */
	private $_pagePath=null;
	/**
	 * @var TPage the requested page
	 */
	private $_page=null;
	/**
	 * @var array list of initial page property values
	 */
	private $_properties=array();
	/**
	 * @var boolean whether service is initialized
	 */
	private $_initialized=false;
	/**
	 * @var TThemeManager theme manager
	 */
	private $_themeManager=null;
	/**
	 * @var TTemplateManager template manager
	 */
	private $_templateManager=null;

	/**
	 * Initializes the service.
	 * This method is required by IService interface and is invoked by application.
	 * @param TXmlElement service configuration
	 */
	public function init($config)
	{
		Prado::trace("Initializing TPageService",'\Prado\Web\Services\TPageService');

		$pageConfig=$this->loadPageConfig($config);

		$this->initPageContext($pageConfig);

		$this->_initialized=true;
	}

	/**
	 * Initializes page context.
	 * Page context includes path alias settings, namespace usages,
	 * parameter initialization, module loadings, page initial properties
	 * and authorization rules.
	 * @param TPageConfiguration
	 */
	protected function initPageContext($pageConfig)
	{
		$application=$this->getApplication();
		foreach($pageConfig->getApplicationConfigurations() as $appConfig)
			$application->applyConfiguration($appConfig);

		$this->applyConfiguration($pageConfig);
	}

	/**
	 * Applies a page configuration.
	 * @param TPageConfiguration the configuration
	 */
	protected function applyConfiguration($config)
	{
		// initial page properties (to be set when page runs)
		$this->_properties=array_merge($this->_properties, $config->getProperties());
		$this->getApplication()->getAuthorizationRules()->mergeWith($config->getRules());
		$pagePath=$this->getRequestedPagePath();
		// external configurations
		foreach($config->getExternalConfigurations() as $filePath=>$params)
		{
			list($configPagePath,$condition)=$params;
			if($condition!==true)
				$condition=$this->evaluateExpression($condition);
			if($condition)
			{
				if(($path=Prado::getPathOfNamespace($filePath,Prado::getApplication()->getConfigurationFileExt()))===null || !is_file($path))
					throw new TConfigurationException('pageservice_includefile_invalid',$filePath);
				$c=new TPageConfiguration($pagePath);
				$c->loadFromFile($path,$configPagePath);
				$this->applyConfiguration($c);
			}
		}

	}

	/**
	 * Determines the requested page path.
	 * @return string page path requested
	 */
	protected function determineRequestedPagePath()
	{
		$pagePath=$this->getRequest()->getServiceParameter();
		if(empty($pagePath))
			$pagePath=$this->getDefaultPage();
		return $pagePath;
	}

	/**
	 * Collects configuration for a page.
	 * @param TXmlElement additional configuration specified in the application configuration
	 * @return TPageConfiguration
	 */
	protected function loadPageConfig($config)
	{
		$application=$this->getApplication();
		$pagePath=$this->getRequestedPagePath();
		if(($cache=$application->getCache())===null)
		{
			$pageConfig=new TPageConfiguration($pagePath);
			if($config!==null)
			{
				if($application->getConfigurationType()==TApplication::CONFIG_TYPE_PHP)
					$pageConfig->loadPageConfigurationFromPhp($config,$application->getBasePath(),'');
				else
					$pageConfig->loadPageConfigurationFromXml($config,$application->getBasePath(),'');
			}
			$pageConfig->loadFromFiles($this->getBasePath());
		}
		else
		{
			$configCached=true;
			$currentTimestamp=array();
			$arr=$cache->get(self::CONFIG_CACHE_PREFIX.$this->getID().$pagePath);
			if(is_array($arr))
			{
				list($pageConfig,$timestamps)=$arr;
				if($application->getMode()!==TApplicationMode::Performance)
				{
					foreach($timestamps as $fileName=>$timestamp)
					{
						if($fileName===0) // application config file
						{
							$appConfigFile=$application->getConfigurationFile();
							$currentTimestamp[0]=$appConfigFile===null?0:@filemtime($appConfigFile);
							if($currentTimestamp[0]>$timestamp || ($timestamp>0 && !$currentTimestamp[0]))
								$configCached=false;
						}
						else
						{
							$currentTimestamp[$fileName]=@filemtime($fileName);
							if($currentTimestamp[$fileName]>$timestamp || ($timestamp>0 && !$currentTimestamp[$fileName]))
								$configCached=false;
						}
					}
				}
			}
			else
			{
				$configCached=false;
				$paths=explode('.',$pagePath);
				$configPath=$this->getBasePath();
				$fileName = $this->getApplication()->getConfigurationType()==TApplication::CONFIG_TYPE_PHP
					? self::CONFIG_FILE_PHP
					: self::CONFIG_FILE_XML;
				foreach($paths as $path)
				{
					$configFile=$configPath.DIRECTORY_SEPARATOR.$fileName;
					$currentTimestamp[$configFile]=@filemtime($configFile);
					$configPath.=DIRECTORY_SEPARATOR.$path;
				}
				$appConfigFile=$application->getConfigurationFile();
				$currentTimestamp[0]=$appConfigFile===null?0:@filemtime($appConfigFile);
			}
			if(!$configCached)
			{
				$pageConfig=new TPageConfiguration($pagePath);
				if($config!==null)
				{
					if($application->getConfigurationType()==TApplication::CONFIG_TYPE_PHP)
						$pageConfig->loadPageConfigurationFromPhp($config,$application->getBasePath(),'');
					else
						$pageConfig->loadPageConfigurationFromXml($config,$application->getBasePath(),'');
				}
				$pageConfig->loadFromFiles($this->getBasePath());
				$cache->set(self::CONFIG_CACHE_PREFIX.$this->getID().$pagePath,array($pageConfig,$currentTimestamp));
			}
		}
		return $pageConfig;
	}

	/**
	 * @return TTemplateManager template manager
	 */
	public function getTemplateManager()
	{
		if(!$this->_templateManager)
		{
			$this->_templateManager=new TTemplateManager;
			$this->_templateManager->init(null);
		}
		return $this->_templateManager;
	}

	/**
	 * @param TTemplateManager template manager
	 */
	public function setTemplateManager(TTemplateManager $value)
	{
		$this->_templateManager=$value;
	}

	/**
	 * @return TThemeManager theme manager
	 */
	public function getThemeManager()
	{
		if(!$this->_themeManager)
		{
			$this->_themeManager=new TThemeManager;
			$this->_themeManager->init(null);
		}
		return $this->_themeManager;
	}

	/**
	 * @param TThemeManager theme manager
	 */
	public function setThemeManager(TThemeManager $value)
	{
		$this->_themeManager=$value;
	}

	/**
	 * @return string the requested page path
	 */
	public function getRequestedPagePath()
	{
		if($this->_pagePath===null)
		{
			$this->_pagePath=strtr($this->determineRequestedPagePath(),'/\\','..');
			if(empty($this->_pagePath))
				throw new THttpException(404,'pageservice_page_required');
		}
		return $this->_pagePath;
	}

	/**
	 * @return TPage the requested page
	 */
	public function getRequestedPage()
	{
		return $this->_page;
	}

	/**
	 * @return string default page path to be served if no explicit page is request. Defaults to 'Home'.
	 */
	public function getDefaultPage()
	{
		return $this->_defaultPage;
	}

	/**
	 * @param string default page path to be served if no explicit page is request
	 * @throws TInvalidOperationException if the page service is initialized
	 */
	public function setDefaultPage($value)
	{
		if($this->_initialized)
			throw new TInvalidOperationException('pageservice_defaultpage_unchangeable');
		else
			$this->_defaultPage=$value;
	}

	/**
	 * @return string the URL for the default page
	 */
	public function getDefaultPageUrl()
	{
		return $this->constructUrl($this->getDefaultPage());
	}

	/**
	 * @return string the root directory for storing pages. Defaults to the 'pages' directory under the application base path.
	 */
	public function getBasePath()
	{
		if($this->_basePath===null)
		{
			$basePath=$this->getApplication()->getBasePath().DIRECTORY_SEPARATOR.self::DEFAULT_BASEPATH;
			if(($this->_basePath=realpath($basePath))===false || !is_dir($this->_basePath))
			{
				$basePath=$this->getApplication()->getBasePath().DIRECTORY_SEPARATOR.self::FALLBACK_BASEPATH;
				if(($this->_basePath=realpath($basePath))===false || !is_dir($this->_basePath))
					throw new TConfigurationException('pageservice_basepath_invalid',$basePath);
			}
		}
		return $this->_basePath;
	}

	/**
	 * @param string root directory (in namespace form) storing pages
	 * @throws TInvalidOperationException if the service is initialized already or basepath is invalid
	 */
	public function setBasePath($value)
	{
		if($this->_initialized)
			throw new TInvalidOperationException('pageservice_basepath_unchangeable');
		else if(($path=Prado::getPathOfNamespace($value))===null || !is_dir($path))
			throw new TConfigurationException('pageservice_basepath_invalid',$value);
		$this->_basePath=realpath($path);
	}

	/**
	 * Sets the base page class name (in namespace format).
	 * If a page only has a template file without page class file,
	 * this base page class will be instantiated.
	 * @param string class name
	 */
	public function setBasePageClass($value)
	{
		$this->_basePageClass=$value;
	}

	/**
	 * @return string base page class name in namespace format. Defaults to 'TPage'.
	 */
	public function getBasePageClass()
	{
		return $this->_basePageClass;
	}

	/**
	 * Sets the clientscript manager class (in namespace format).
	 * @param string class name
	 * @since 3.1.7
	 */
	public function setClientScriptManagerClass($value)
	{
		$this->_clientScriptManagerClass=$value;
	}

	/**
	 * @return string clientscript manager class in namespace format. Defaults to 'System.Web.UI.TClientScriptManager'.
	 * @since 3.1.7
	 */
	public function getClientScriptManagerClass()
	{
		return $this->_clientScriptManagerClass;
	}

	/**
	 * Runs the service.
	 * This will create the requested page, initializes it with the property values
	 * specified in the configuration, and executes the page.
	 */
	public function run()
	{
		Prado::trace("Running page service",'System.Web.Services.TPageService');
		$this->_page=$this->createPage($this->getRequestedPagePath());
		$this->runPage($this->_page,$this->_properties);
	}

	/**
	 * Creates a page instance based on requested page path.
	 * @param string requested page path
	 * @return TPage the requested page instance
	 * @throws THttpException if requested page path is invalid
	 * @throws TConfigurationException if the page class cannot be found
	 */
	protected function createPage($pagePath)
	{
		$path=$this->getBasePath().DIRECTORY_SEPARATOR.strtr($pagePath,'.',DIRECTORY_SEPARATOR);
		$hasTemplateFile=is_file($path.self::PAGE_FILE_EXT);
		$hasClassFile=is_file($path.Prado::CLASS_FILE_EXT);

		if(!$hasTemplateFile && !$hasClassFile)
			throw new THttpException(404,'pageservice_page_unknown',$pagePath);

		if($hasClassFile)
		{
			$className=basename($path);
			if(!class_exists($className,false))
				include_once($path.Prado::CLASS_FILE_EXT);
		}
		else
		{
			$className=$this->getBasePageClass();
			Prado::using($className);
			if(($pos=strrpos($className,'.'))!==false)
				$className=substr($className,$pos+1);
		}

 		if(!class_exists($className,false) || ($className!=='TPage' && !is_subclass_of($className,'TPage')))
			throw new THttpException(404,'pageservice_page_unknown',$pagePath);

		$page=new $className;
		$page->setPagePath($pagePath);

		if($hasTemplateFile)
			$page->setTemplate($this->getTemplateManager()->getTemplateByFileName($path.self::PAGE_FILE_EXT));

		return $page;
	}

	/**
	 * Executes a page.
	 * @param TPage the page instance to be run
	 * @param array list of initial page properties
	 */
	protected function runPage($page,$properties)
	{
		foreach($properties as $name=>$value)
			$page->setSubProperty($name,$value);
		$page->run($this->getResponse()->createHtmlWriter());
	}

	/**
	 * Constructs a URL with specified page path and GET parameters.
	 * @param string page path
	 * @param array list of GET parameters, null if no GET parameters required
	 * @param boolean whether to encode the ampersand in URL, defaults to true.
	 * @param boolean whether to encode the GET parameters (their names and values), defaults to true.
	 * @return string URL for the page and GET parameters
	 */
	public function constructUrl($pagePath,$getParams=null,$encodeAmpersand=true,$encodeGetItems=true)
	{
		return $this->getRequest()->constructUrl($this->getID(),$pagePath,$getParams,$encodeAmpersand,$encodeGetItems);
	}
}