summaryrefslogtreecommitdiffstats
path: root/system/libraries/Controller.php
blob: 6a3ea9962db879c4e7af46abc0413673d6ebec6d (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
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * Code Igniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package		CodeIgniter
 * @author		Rick Ellis
 * @copyright	Copyright (c) 2006, pMachine, Inc.
 * @license		http://www.codeignitor.com/user_guide/license.html 
 * @link		http://www.codeigniter.com
 * @since		Version 1.0
 * @filesource
 */
 
// ------------------------------------------------------------------------

/**
 * Code Igniter Application Controller Class
 *
 * This class object is the the super class the every library in 
 * Code Igniter will be assigned to.
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	Libraries
 * @author		Rick Ellis
 * @link		http://www.codeigniter.com/user_guide/general/controllers.html
 */
class Controller extends CI_Base {

	var $_ci_models			= array();
	var $_ci_scaffolding	= FALSE;
	var $_ci_scaff_table	= FALSE;
	
	/**
	 * Constructor
	 *
	 * Loads the base classes needed to run CI, and runs the "autoload"
	 * routine which loads the systems specified in the "autoload" config file.
	 */
	function Controller()
	{	
		parent::CI_Base();
		
		// Assign all the class objects that were instantiated by the
		// front controller to local class variables so that CI can be 
		// run as one big super object.
		$this->_ci_assign_core();
		
		// Load everything specified in the autoload.php file
		$this->load->_ci_autoloader($this->_ci_autoload());

		// This allows anything loaded using $this->load (viwes, files, etc.)
		// to become accessible from within the Controller class functions.
		foreach (get_object_vars($this) as $key => $var)
		{
			if (is_object($var))
			{
				$this->load->$key =& $this->$key;
			}
		}
		
		log_message('debug', "Controller Class Initialized");
	}
   	
	// --------------------------------------------------------------------

	/**
	 * Initialization Handler
	 *
	 * This function loads the requested class.
	 *
	 * @access	private
	 * @param 	string	the item that is being loaded
	 * @param	mixed	any additional parameters
	 * @return 	void
	 */
	function _ci_load_class($class, $params = NULL)
	{	
		// Prep the class name
		$class = strtolower(str_replace(EXT, '', $class));
		
		// Bug fix for backward compat.  
		// Kill this at some point in the future
		if ($class == 'unit_test')
		{
			$class = 'unit';
		}

		// Is this a class extension request?	
		if (substr($class, 0, 3) == 'my_')
		{
			$class = preg_replace("/my_(.+)/", "\\1", $class);
			$extend = TRUE;
		}
		else
		{
			$extend = FALSE;
		}
		
		// Does THIS file (Controller.php) contain an initialization
		// function that maps to the requested class?
		
		$method = '_ci_init_'.$class;
		
		if (method_exists($this, $method))
		{		
			if (is_null($params))
			{
				$this->$method();
			}
			else
			{
				$this->$method($params);
			}		
		
			// We're done...
			return TRUE;
		}
		
		// Are we extending one of the base classes?
		if ($extend == TRUE)
		{
			// Load the requested library from the main system/libraries folder
			if (file_exists(BASEPATH.'libraries/'.ucfirst($class).EXT))
			{
				include_once(BASEPATH.'libraries/'.ucfirst($class).EXT);
			}
			
			// Now look for a matching library
			foreach (array(ucfirst($class), $class) as $filename)
			{
				if (file_exists(APPPATH.'libraries/'.$filename.EXT))
				{
					include_once(APPPATH.'libraries/'.$filename.EXT);	
				}
			}
			
			return $this->_ci_init_class($filename, 'MY_', $params);
		}
		else
		{		
			// Lets search for the requested library file and load it.
			// For backward compatibility we'll test for filenames that are
			// both uppercase and lower.
			foreach (array(ucfirst($class), $class) as $filename)
			{
				for ($i = 1; $i < 3; $i++)
				{
					$path = ($i % 2) ? APPPATH : BASEPATH;
				
					if (file_exists($path.'libraries/'.$filename.EXT))
					{
						include_once($path.'libraries/'.$filename.EXT);
						return $this->_ci_init_class($filename, '', $params);
					}
				}
			}
		}
		
		// If we got this far we were unable to find the requested class
		log_message('error', "Unable to load the requested class: ".$class);
		show_error("Unable to load the class: ".$class);
	}
	
	// --------------------------------------------------------------------

	/**
	 * Instantiates a class
	 *
	 * @access	private
	 * @param	string
	 * @param	string
	 * @return	null
	 */
	function _ci_init_class($class, $prefix = '', $config = NULL)
	{	
		// Is there an associated config file for this class?
		if ($config == NULL)
		{
			if (file_exists(APPPATH.'config/'.$class.EXT))
			{
				include_once(APPPATH.'config/'.$class.EXT);
			}
		}
		
		if ($prefix == '')
		{
			$name = ( ! class_exists($class)) ? 'CI_'.$class : $class;
		}
		else
		{
			$name = $prefix.$class;
		}
						
		$varname = ( ! isset($remap[$class])) ? $class : $remap[$class];
		$varname = strtolower($varname);
				
		// Instantiate the class
		if ($config !== NULL)
		{
			$this->$varname = new $name($config);
		}
		else
		{		
			$this->$varname = new $name;
		}	
	}
  	
	// --------------------------------------------------------------------

	/**
	 * Loads and instantiates the requested model class
	 *
	 * @access	private
	 * @param	string
	 * @return	array
	 */
	function _ci_init_model($model, $name = '', $db_conn = FALSE)
	{
		// Is the model in a sub-folder?
		// If so, parse out the filename and path.
		if (strpos($model, '/') === FALSE)
		{
			$path = '';
		}
		else
		{
			$x = explode('/', $model);
			$model = end($x);			
			unset($x[count($x)-1]);
			$path = implode('/', $x).'/';
		}
	
		if ($name == '')
		{
			$name = $model;
		}
		
		$obj =& get_instance();
		if (in_array($name, $obj->_ci_models, TRUE))
		{
			return;
		}		
		
		if (isset($this->$name))
		{
			show_error('The model name you are loading is the name of a resource that is already being used: '.$name);
		}
	
		$model = strtolower($model);
		
		if ( ! file_exists(APPPATH.'models/'.$path.$model.EXT))
		{
			show_error('Unable to locate the model you have specified: '.$model);
		}
				
		if ($db_conn !== FALSE)
		{
			if ($db_conn === TRUE)
				$db_conn = '';
		
			$this->_ci_init_database($db_conn, FALSE, TRUE);
		}
	
		if ( ! class_exists('Model'))
		{
			require_once(BASEPATH.'libraries/Model'.EXT);
		}

		require_once(APPPATH.'models/'.$path.$model.EXT);

		$model = ucfirst($model);
		$this->$name = new $model();
		$this->_ci_models[] = $name;
		$this->_ci_assign_to_models();
	}  	

	// --------------------------------------------------------------------

	/**
	 * Assign to Models
	 *
	 * Makes sure that anything loaded by the loader class (libraries, plugins, etc.)
	 * will be available to modles, if any exist.
	 *
	 * @access	public
	 * @param	object
	 * @return	array
	 */
	function _ci_assign_to_models()
	{
		$obj =& get_instance();
		if (count($obj->_ci_models) == 0)
		{
			return;
		}
		foreach ($obj->_ci_models as $model)
		{			
			$obj->$model->_assign_libraries();			
		}		
	}  	
  	
	// --------------------------------------------------------------------

	/**
	 * Auto-initialize Core Classes
	 *
	 * This initializes the core systems that are specified in the 
	 * libraries/autoload.php file, as well as the systems specified in
	 * the $autoload class array above.
	 *
	 * It returns the "autoload" array so we can pass it to the Loader 
	 * class since it needs to autoload plugins and helper files
	 *
	 * The config/autoload.php file contains an array that permits 
	 * sub-systems to be loaded automatically.
	 *
	 * @access	private
	 * @return	array
	 */
	function _ci_autoload()
	{
		include_once(APPPATH.'config/autoload'.EXT);
		
		if ( ! isset($autoload))
		{
			return FALSE;
		}
		
		if (count($autoload['config']) > 0)
		{
			foreach ($autoload['config'] as $key => $val)
			{
				$this->config->load($val);
			}
		}
		unset($autoload['config']);
		
		// A little tweak to remain backward compatible
		// The $autoload['core'] item was deprecated
		if ( ! isset($autoload['libraries']))
		{
			$autoload['libraries'] = $autoload['core'];
		
		}
		
		$exceptions = array('dbutil', 'dbexport');
		
		foreach ($autoload['libraries'] as $item)
		{
			if ( ! in_array($item, $exceptions, TRUE))
			{
				$this->_ci_load_class($item);
			}
			else
			{
				$this->_ci_init_dbextra($item);
			}
		}
		unset($autoload['libraries']);

		return $autoload;
	}
  	
	// --------------------------------------------------------------------

	/**
	 * Assign the core classes to the global $CI object
	 *
	 * By assigning all the classes instantiated by the front controller
	 * local class variables we enable everything to be accessible using
	 * $this->class->function()
	 *
	 * @access	private
	 * @return	void
	 */
	function _ci_assign_core()
	{
		foreach (array('Config', 'Input', 'Benchmark', 'URI', 'Output') as $val)
		{
			$class = strtolower($val);
			$this->$class =& _load_class($val);
		}
		
		$this->lang	=& _load_class('Language');
	
		// In PHP 4 the Controller class is a child of CI_Loader.
		// In PHP 5 we run it as its own class.
		if (floor(phpversion()) >= 5)
		{
			$this->load = new CI_Loader();
		}
	}
  	
	// --------------------------------------------------------------------

	/**
	 * Initialize Scaffolding
	 *
	 * This initializing function works a bit different than the
	 * others. It doesn't load the class.  Instead, it simply
	 * sets a flag indicating that scaffolding is allowed to be
	 * used.  The actual scaffolding function below is
	 * called by the front controller based on whether the
	 * second segment of the URL matches the "secret" scaffolding
	 * word stored in the application/config/routes.php
	 *
	 * @access	private
	 * @param	string	the table to scaffold
	 * @return	void
	 */
	function _ci_init_scaffolding($table = FALSE)
	{
		if ($table === FALSE)
		{
			show_error('You must include the name of the table you would like access when you initialize scaffolding');
		}
		
		$this->_ci_scaffolding = TRUE;
		$this->_ci_scaff_table = $table;
	}
  	
	// --------------------------------------------------------------------

	/**
	 * Initialize Database
	 *
	 * @access	private
	 * @param	mixed	database connection values
	 * @param	bool	whether to return the object for multiple connections
	 * @param	bool	whether to load the active record class
	 * @return	void
	 */
	function _ci_init_database($params = '', $return = FALSE, $active_record = FALSE)
	{	
		if ($this->_ci_is_loaded('db') == TRUE AND $return == FALSE AND $active_record == FALSE)
		{
			return;
		}
	
		// Load the DB config file if needed.  We'll test for a DSN string
		if (is_string($params) AND strpos($params, '://') === FALSE)
		{
			include(APPPATH.'config/database'.EXT);
			
			$group = ($params == '') ? $active_group : $params;
			
			if ( ! isset($db[$group]))
			{
				show_error('You have specified an invalid database connection group: '.$group);
			}
			
			$params = $db[$group];
		}
		
		// No DB specified yet?  Beat them senseless...
		if ( ! isset($params['dbdriver']) OR $params['dbdriver'] == '')
		{
			show_error('You have not selected a database type to connect to.');
		}

		// Load the DB classes.  Note: Since the active record class is optional
		// we need to dynamically create a class that extends proper parent class 
		// based on whether we're using the active record class or not.
		// Kudos to Paul for discovering this clever use of eval()
		
		if ($active_record == TRUE)
		{
			$params['active_r'] = TRUE;
		}
		
		require_once(BASEPATH.'database/DB_driver'.EXT);

		if ( ! isset($params['active_r']) OR $params['active_r'] == TRUE) 
		{
			require_once(BASEPATH.'database/DB_active_rec'.EXT);
			
			if ( ! class_exists('CI_DB'))
			{
				eval('class CI_DB extends CI_DB_active_record { }');
			}
		}
		else
		{
			if ( ! class_exists('CI_DB'))
			{
				eval('class CI_DB extends CI_DB_driver { }');
			}
		}
				
		require_once(BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver'.EXT);

		// Instantiate the DB adapter
		$driver = 'CI_DB_'.$params['dbdriver'].'_driver';
		$DB = new $driver($params);
		
		if ($return === TRUE)
		{
			return $DB;
		}
		
		$obj =& get_instance();
		$obj->db =& $DB;
	}

	// --------------------------------------------------------------------

	/**
	 * Initialize Database Ancillary Classes
	 *
	 * @access	private
	 * @param	str		class name
	 * @return	void
	 */
	function _ci_init_dbextra($class)
	{
		if ( ! $this->_ci_is_loaded('db'))
		{
			$this->_ci_init_database();
		}
			
		if ($class == 'dbutil')
		{
			require_once(BASEPATH.'database/DB_utility'.EXT);
			require_once(BASEPATH.'database/drivers/'.$this->db->dbdriver.'/'.$this->db->dbdriver.'_utility'.EXT);
			$class = 'CI_DB_'.$this->db->dbdriver.'_utility';
			$this->dbutil = new $class();
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Returns TRUE if a class is loaded, FALSE if not
	 *
	 * @access	public
	 * @param	string	 the class name
	 * @return	bool
	 */
	function _ci_is_loaded($class)
	{
		return ( ! isset($this->$class) OR ! is_object($this->$class)) ? FALSE : TRUE;
	}
  	  	
	// --------------------------------------------------------------------

	/**
	 * Scaffolding
	 *
	 * Initializes the scaffolding.
	 *
	 * @access	private
	 * @return	void
	 */
	function _ci_scaffolding()
	{
		if ($this->_ci_scaffolding === FALSE OR $this->_ci_scaff_table === FALSE)
		{
			show_404('Scaffolding unavailable');
		}
		
		if (class_exists('Scaffolding')) return;
			
		if ( ! in_array($this->uri->segment(3), array('add', 'insert', 'edit', 'update', 'view', 'delete', 'do_delete'), TRUE))
		{
			$method = 'view';
		}
		else
		{
			$method = $this->uri->segment(3);
		}
		
		$this->_ci_init_database("", FALSE, TRUE);
		$this->_ci_load_class('pagination');
		require_once(BASEPATH.'scaffolding/Scaffolding'.EXT);
		$this->scaff = new Scaffolding($this->_ci_scaff_table);
		$this->scaff->$method();
	}

}
// END _Controller class
?>