summaryrefslogtreecommitdiffstats
path: root/system/libraries/Calendar.php
blob: ec355d24fff598d7ccddf4880e35bd35c0cbbe48 (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
<?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 Calendar Class
 *
 * This class enables the creation of calendars 
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	Libraries
 * @author		Rick Ellis
 * @link		http://www.codeigniter.com/user_guide/libraries/calendar.html
 */ 
class CI_Calendar {

	var $CI;
	var $lang;
	var $local_time;
	var $template		= '';
	var $start_day		= 'sunday';
	var $month_type 	= 'long';
	var $day_type		= 'abr';
	var $show_next_prev	= FALSE;
	var $next_prev_url	= '';

	/**
	 * Constructor
	 *
	 * Loads the calendar language file and sets the default time reference
	 *
	 * @access	public
	 */
	function CI_Calendar()
	{		
		$this->CI =& get_instance();
		
		if ( ! in_array('calendar_lang'.EXT, $this->CI->lang->is_loaded, TRUE))
		{
			$this->CI->lang->load('calendar');
		}

		$this->local_time = time();
		log_message('debug', "Calendar Class Initialized");
	}
	
	// --------------------------------------------------------------------
	
	/**
	 * Initialize the user preferences
	 *
	 * Accepts an associative array as input, containing display preferences
	 *
	 * @access	public
	 * @param	array	config preferences
	 * @return	void
	 */	
	function initialize($config = array())
	{
		foreach ($config as $key => $val)
		{
			if (isset($this->$key))
			{
				$this->$key = $val;
			}
		}
	} 
	
	// --------------------------------------------------------------------

	/**
	 * Generate the calendar
	 *
	 * @access	public
	 * @param	integer	the year
	 * @param	integer	the month
	 * @param	array	the data to be shown in the calendar cells
	 * @return	string
	 */
    function generate($year = '', $month = '', $data = array())
    {
		// Set and validate the supplied month/year
    	if ($year == '')
    		$year  = date("Y", $this->local_time);
    		
    	if ($month == '')
			$month = date("m", $this->local_time);
			
 		if (strlen($year) == 1)
			$year = '200'.$year;
		
 		if (strlen($year) == 2)
			$year = '20'.$year;

 		if (strlen($month) == 1)
			$month = '0'.$month;
		
		$adjusted_date = $this->adjust_date($month, $year);
		
		$month	= $adjusted_date['month'];
		$year	= $adjusted_date['year'];  
		
		// Determine the total days in the month
		$total_days = $this->get_total_days($month, $year); 
						
		// Set the starting day of the week
		$start_days	= array('sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday' => 3, 'thursday' => 4, 'friday' => 5, 'saturday' => 6);
		$start_day = ( ! isset($start_days[$this->start_day])) ? 0 : $start_days[$this->start_day];
		
		// Set the starting day number
		$local_date = mktime(12, 0, 0, $month, 1, $year);
		$date = getdate($local_date);
		$day  = $start_day + 1 - $date["wday"];
		
		while ($day > 1)
		{
			$day -= 7;
		}
		
		// Set the current month/year/day
		// We use this to determine the "today" date
		$cur_year	= date("Y", $this->local_time);
		$cur_month	= date("m", $this->local_time);
		$cur_day	= date("j", $this->local_time);
		
		$is_current_month = ($cur_year == $year AND $cur_month == $month) ? TRUE : FALSE;
	
		// Generate the template data array
		$this->parse_template();
	
		// Begin building the calendar output						
		$out = $this->temp['table_open'];
		$out .= "\n";	

		$out .= "\n";		
		$out .= $this->temp['heading_row_start'];
		$out .= "\n";
		
		// "previous" month link
		if ($this->show_next_prev == TRUE)
		{
			$adjusted_date = $this->adjust_date($month - 1, $year);
			$out .= str_replace('{previous_url}', $this->next_prev_url.$adjusted_date['year'].'/'.$adjusted_date['month'], $this->temp['heading_previous_cell']);
			$out .= "\n";
		}

		// Heading containing the month/year
		$colspan = ($this->show_next_prev == TRUE) ? 5 : 7;
		
		$this->temp['heading_title_cell'] = str_replace('{colspan}', $colspan, $this->temp['heading_title_cell']);
		$this->temp['heading_title_cell'] = str_replace('{heading}', $this->get_month_name($month)."&nbsp;".$year, $this->temp['heading_title_cell']);
		
		$out .= $this->temp['heading_title_cell'];
		$out .= "\n";

		// "next" month link
		if ($this->show_next_prev == TRUE)
		{		
			$adjusted_date = $this->adjust_date($month + 1, $year);
			$out .= str_replace('{next_url}', $this->next_prev_url.$adjusted_date['year'].'/'.$adjusted_date['month'], $this->temp['heading_next_cell']);
		}

		$out .= "\n";		
		$out .= $this->temp['heading_row_end'];
		$out .= "\n";

		// Write the cells containing the days of the week
		$out .= "\n";	
		$out .= $this->temp['week_row_start'];
		$out .= "\n";

		$day_names = $this->get_day_names();

		for ($i = 0; $i < 7; $i ++)
		{
			$out .= str_replace('{week_day}', $day_names[($start_day + $i) %7], $this->temp['week_day_cell']);
		}

		$out .= "\n";
		$out .= $this->temp['week_row_end'];
		$out .= "\n";

		// Build the main body of the calendar        
		while ($day <= $total_days)
		{
			$out .= "\n";
			$out .= $this->temp['cal_row_start'];
			$out .= "\n";

			for ($i = 0; $i < 7; $i++)
			{ 
				$out .= ($is_current_month == TRUE AND $day == $cur_day) ? $this->temp['cal_cell_start_today'] : $this->temp['cal_cell_start'];
			
				if ($day > 0 AND $day <= $total_days)
				{ 					
					if (isset($data[$day]))
					{	
						// Cells with content
						$temp = ($is_current_month == TRUE AND $day == $cur_day) ? $this->temp['cal_cell_content_today'] : $this->temp['cal_cell_content'];
						$out .= str_replace('{day}', $day, str_replace('{content}', $data[$day], $temp));
					}
					else
					{
						// Cells with no content
						$temp = ($is_current_month == TRUE AND $day == $cur_day) ? $this->temp['cal_cell_no_content_today'] : $this->temp['cal_cell_no_content'];
						$out .= str_replace('{day}', $day, $temp);
					}
				}
				else
				{
					// Blank cells
					$out .= $this->temp['cal_cell_blank'];
				}
				
				$out .= ($is_current_month == TRUE AND $day == $cur_day) ? $this->temp['cal_cell_end_today'] : $this->temp['cal_cell_end'];				      	        
        	    $day++;
			}
			
			$out .= "\n";    	    
			$out .= $this->temp['cal_row_end'];
			$out .= "\n";    	    
		}

		$out .= "\n";    	
		$out .= $this->temp['table_close'];

		return $out;
    }
	
	// --------------------------------------------------------------------

	/**
	 * Get Month Name
	 *
	 * Generates a textual month name based on the numeric 
	 * month provided.
	 *
	 * @access	public
	 * @param	integer	the month
	 * @return	string
	 */
	function get_month_name($month)
	{
		if ($this->month_type == 'short')
		{
			$month_names = array('01' => 'cal_jan', '02' => 'cal_feb', '03' => 'cal_mar', '04' => 'cal_apr', '05' => 'cal_may', '06' => 'cal_jun', '07' => 'cal_jul', '08' => 'cal_aug', '09' => 'cal_sep', '10' => 'cal_oct', '11' => 'cal_nov', '12' => 'cal_dec');
		}
		else
		{
			$month_names = array('01' => 'cal_january', '02' => 'cal_february', '03' => 'cal_march', '04' => 'cal_april', '05' => 'cal_mayl', '06' => 'cal_june', '07' => 'cal_july', '08' => 'cal_august', '09' => 'cal_september', '10' => 'cal_october', '11' => 'cal_november', '12' => 'cal_december');
		}
		
		$month = $month_names[$month];
		
		if ($this->CI->lang->line($month) === FALSE)
		{
			return ucfirst(str_replace('cal_', '', $month));
		}

		return $this->CI->lang->line($month);
	}
	
	// --------------------------------------------------------------------
 
	/**
	 * Get Day Names
	 *
	 * Returns an array of day names (Sunday, Monday, etc.) based
	 * on the type.  Options: long, short, abrev 
	 *
	 * @access	public
	 * @param	string
	 * @return	array
	 */
	function get_day_names($day_type = '')
	{
		if ($day_type != '')
			$this->day_type = $day_type;
	
		if ($this->day_type == 'long')
		{
			$day_names = array('sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday');
		}
		elseif ($this->day_type == 'short')
		{
			$day_names = array('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat');
		}
		else
		{
			$day_names = array('su', 'mo', 'tu', 'we', 'th', 'fr', 'sa');
		}
	
		$days = array();
		foreach ($day_names as $val)
		{			
			$days[] = ($this->CI->lang->line('cal_'.$val) === FALSE) ? ucfirst($val) : $this->CI->lang->line('cal_'.$val);
		}
	
		return $days;
	}
 	
	// --------------------------------------------------------------------

	/**
	 * Adjust Date
	 *
	 * This function makes sure that we have a valid month/year.
	 * For example, if you submit 13 as the month, the year will
	 * increment and the month will become January.
	 *
	 * @access	public
	 * @param	integer	the month
	 * @param	integer	the year
	 * @return	array
	 */
    function adjust_date($month, $year)
    {
        $date = array(); 
                
        $date['month']	= $month;
        $date['year']	= $year;
        
        while ($date['month'] > 12)
        {
            $date['month'] -= 12;
            $date['year']++;
        }
        
        while ($date['month'] <= 0)
        {
            $date['month'] += 12;
            $date['year']--;
        }
        
        if (strlen($date['month']) == 1)
        {
        	$date['month'] = '0'.$date['month'];
        }
        
        return $date;
    }
 	
	// --------------------------------------------------------------------

	/**
	 * Total days in a given month
	 *
	 * @access	public
	 * @param	integer	the month
	 * @param	integer	the year
	 * @return	integer
	 */
    function get_total_days($month, $year)
    {
    	$days_in_month	= array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
    
        if ($month < 1 OR $month > 12)
        {
            return 0;
        }
        
        // Is the year a leap year?
        if ($month == 2)
        {        
			if ($year % 400 == 0 OR ($year % 4 == 0 AND $year % 100 != 0))
			{
				return 29;
			}
        }
    
        return $days_in_month[$month - 1];
    }
	
	// --------------------------------------------------------------------

	/**
	 * Set Default Template Data
	 *
	 * This is used in the event that the user has not created their own template
	 *
	 * @access	public
	 * @return array
	 */
	function default_template()
	{
		return  array (
						'table_open' 				=> '<table border="0" cellpadding="4" cellspacing="0">',
						'heading_row_start' 		=> '<tr>',
						'heading_previous_cell'		=> '<th><a href="{previous_url}">&lt;&lt;</a></th>',
						'heading_title_cell' 		=> '<th colspan="{colspan}">{heading}</th>',
						'heading_next_cell' 		=> '<th><a href="{next_url}">&gt;&gt;</a></th>',
						'heading_row_end' 			=> '</tr>',
						'week_row_start' 			=> '<tr>',
						'week_day_cell' 			=> '<td>{week_day}</td>',
						'week_row_end' 				=> '</tr>',
						'cal_row_start' 			=> '<tr>',
						'cal_cell_start' 			=> '<td>',
						'cal_cell_start_today'		=> '<td>',
						'cal_cell_content'			=> '<a href="{content}">{day}</a>',
						'cal_cell_content_today'	=> '<a href="{content}"><strong>{day}</strong></a>',
						'cal_cell_no_content'		=> '{day}',
						'cal_cell_no_content_today'	=> '<strong>{day}</strong>',
						'cal_cell_blank'			=> '&nbsp;',
						'cal_cell_end'				=> '</td>',
						'cal_cell_end_today'		=> '</td>',
						'cal_row_end'				=> '</tr>',
						'table_close'				=> '</table>'
					);	
	}
	
	// --------------------------------------------------------------------

	/**
	 * Parse Template
	 *
	 * Harvests the data within the template {pseudo-variables}
	 * used to display the calendar
	 *
	 * @access	public
	 * @return	void
	 */
 	function parse_template()
 	{
		$this->temp = $this->default_template();
 	
 		if ($this->template == '')
 		{
 			return;
 		}
 		
		$today = array('cal_cell_start_today', 'cal_cell_content_today', 'cal_cell_no_content_today', 'cal_cell_end_today');
		
		foreach (array('table_open', 'table_close', 'heading_row_start', 'heading_previous_cell', 'heading_title_cell', 'heading_next_cell', 'heading_row_end', 'week_row_start', 'week_day_cell', 'week_row_end', 'cal_row_start', 'cal_cell_start', 'cal_cell_content', 'cal_cell_no_content',  'cal_cell_blank', 'cal_cell_end', 'cal_row_end', 'cal_cell_start_today', 'cal_cell_content_today', 'cal_cell_no_content_today', 'cal_cell_end_today') as $val)
		{
			if (preg_match("/\{".$val."\}(.*?)\{\/".$val."\}/si", $this->template, $match))
			{
				$this->temp[$val] = $match['1'];
			}
			else
			{
				if (in_array($val, $today, TRUE))
				{
					$this->temp[$val] = $this->temp[str_replace('_today', '', $val)];
				}
			}
		} 	
 	}

}

// END CI_Calendar class
?>