console-seolan /add-ons/ical/functions/parse/recur_functions.php

Language PHP Lines 258
MD5 Hash 70546ab525855b8a1571bafaf3fd91b6
Repository https://github.com/jcplat/console-seolan.git View Raw File
  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
<?php
/* from the std

"BYxxx rule parts modify the recurrence in some manner. BYxxx rule parts for a period of time which is the same or greater than the frequency generally reduce or limit the number of occurrences of the recurrence generated. For example, "FREQ=DAILY;BYMONTH=1" reduces the number of recurrence instances from all days (if BYMONTH tag is not present) to all days in January. BYxxx rule parts for a period of time less than the frequency generally increase or expand the number of occurrences of the recurrence. For example, "FREQ=YEARLY;BYMONTH=1,2" increases the number of days within the yearly recurrence set from 1 (if BYMONTH tag is not present) to 2.

If multiple BYxxx rule parts are specified, then after evaluating the specified FREQ and INTERVAL rule parts, the BYxxx rule parts are applied to the current set of evaluated occurrences in the following order: BYMONTH, BYWEEKNO, BYYEARDAY, BYMONTHDAY, BYDAY, BYHOUR, BYMINUTE, BYSECOND and BYSETPOS; then COUNT and UNTIL are evaluated."

We will use two kinds of functions - those that restrict the date to allowed values and those that expand allowed values
*/

function add_recur($times,$freq=''){
	global $recur_data;
	global $count, $mArray_begin, $mArray_end, $except_dates, $start_date, $start_date_unixtime,$end_range_unixtime,$until_unixtime, $day_offset, $current_view;	

	if (!is_array($times)) $times = array($times);
	/*	BYMONTH, BYWEEKNO, BYYEARDAY, BYMONTHDAY, BYDAY, BYHOUR, BYMINUTE, BYSECOND and BYSETPOS	*/
#dump_times($times);
	if ($current_view != 'search'){
		$times = restrict_bymonth($times,$freq); 
	#	$times = restrict_byweekno($times,$freq);
		$times = restrict_byyearday($times,$freq);
		$times = restrict_bymonthday($times,$freq);
		$times = restrict_byday($times,$freq);
		if($start_date_unixtime > $mArray_begin) $times[] = $start_date_unixtime;
		$times = restrict_bysetpos($times,$freq);#echo "restrict_bysetpos";
		$times = array_unique($times);
		sort($times); 
	}
	$until_date = date("Ymd",$end_range_unixtime);
	foreach ($times as $time){ 
		#echo "time:". date("Ymd",$time)." $until_date<br>\n";
		if (!isset($time) || $time == '') continue;
		$date = date("Ymd",$time);
		$time = strtotime("$date 12:00:00");
		# day offset fixes shifts across day boundaries due to time diffs.  
		# These are already fixed for the initial instance, but need to be fixed for recurrences
		if (date("Ymd", $time) != $start_date) $time = $time + $day_offset * (24*60*60);
		if(isset($time) 
			&& $time != ''
			&& !in_array($time, $recur_data) 
			&& !in_array($date, $except_dates) 
			&& $time <= $until_unixtime 
			&& $time >= $start_date_unixtime 
			&& $date <= $until_date
		){ 
			$count--; #echo "\n.$count\n";
			if($time >= $mArray_begin 
				&& $time  <= $mArray_end 
				&& $count >= 0
			) $recur_data[] = $time;
		}
	}
#dump_times($recur_data);
	return;
}
function expand_bymonth($time){
	global $bymonth, $byweekno, $bymonthday, $year, $start_unixtime, $freq_type;
	if(!empty($byweekno)) return $time;
	if(empty($bymonth)) $bymonth = array(date("m", $start_unixtime)); 
	$d = date("d",$start_unixtime);
	if (!empty($bymonthday)) $d = 1;
	foreach ($bymonth as $m){ 
		$time = mktime(12,0,0,$m,$d,$year); #echo "exm:".date("Ymd",$time)."\n";
		$times[] = $time;
	}	
	return $times;	
}
function expand_byweekno($times){
	global $byweekno, $year, $freq_type, $wkst, $wkst3char;
	# byweekno is only used when repeat is yearly
	# when it's set, the input times are irrelevant
	# it also needs a byday.
	if ($freq_type != 'year') return $times;
	if (empty($byweekno)) return $times;
	$total_weeks = date("W",mktime(12,0,0,12,24,$year) ) +1;
	$w1_start = strtotime("this $wkst3char", mktime(12,0,0,1,1,$year) ); 
	foreach($byweekno as $weekno){ 
		if($weekno < 0) $weekno = $weekno + $total_weeks;
		#echo "\n $wkst3char w1st:".date("Ymd", $w1_start)." ".date("Ymd", mktime(12,0,0,1,1,$year))." weekno:$weekno";
		$new_times[] = strtotime("+".(($weekno-1)*7)."days",$w1_start);
	}
	#dump_times($new_times);
	return $new_times;
}

function expand_byyearday($times){
	global $byyearday, $year;
	if (empty($byyearday)) return $times;
	$py = $year-1; 
	$ny = $year+1;
	$new_times = array();
	foreach($times as $time){ 
		foreach($byyearday as $yearday){
			if($yearday > 0){ $day = strtotime("+$yearday days Dec 31, $py");#echo "\n".date("Ymd",$day)." = +$yearday days Dec 31, $py";
			}else $day = strtotime("Jan 1 $ny $yearday days");
			if(date("Y",$day == $year)) $new_times[] = $day;
		}	
	}
#	dump_times($new_times);
	return $new_times;
}

function expand_bymonthday($times){
	global $bymonthday, $year;
	if (empty($bymonthday)) return $times;
	foreach($times as $time){ 
		$month = date('m',$time);
		foreach($bymonthday as $monthday){ 
			if($monthday < 0) $monthday = date("t",$time) + $monthday +1;
			$new_times[] = mktime(12,0,0,$month,$monthday,$year);
			#echo "monthday:$monthday\n";
		}	
	}	
	return $new_times;
}

function expand_byday($time){
	global $freq_type, $byday, $bymonth,$byweekno, $wkst3char, $year, $month, $start_unixtime, $summary;
	if (empty($byday)) return array($time);
	$times = array();
	$the_sunday = dateOfWeek(date("Ymd",$time), $wkst3char);
	#echo "<pre>$summary $freq_type ".print_r($byday,true)."$wkst3char $the_sunday</pre>";
	foreach($byday as $key=>$day) {
		/* set $byday_arr
				[0] => byday string, e.g. 4TH
				[1] => sign/modifier
				[2] => 4 number
				[3] => TH day abbr
		*/
		ereg ('([-\+]{0,1})?([0-9]+)?([A-Z]{2})', $day, $byday_arr);
		$on_day = two2threeCharDays($byday_arr[3]);
		switch($freq_type){
			case 'week':
				#need to find the first day of the appropriate week.
				$next_date_time = strtotime("this $on_day",strtotime($the_sunday)) + (12 * 60 * 60);					
				$times[] = $next_date_time; 
				break;
			case 'month':
				$time = mktime(12,0,0,$month,1,$year);
			case 'year':
				if(empty($byweekno)){
					$week_arr = array(1,2,3,4,5);
					if(isset($byday_arr[2]) && $byday_arr[2] !='') $week_arr = array($byday_arr[2]); 
					$month_start = strtotime(date("Ym00",$time));
					$month_end = strtotime(date("Ymt",$time))+ (36 * 60 * 60);
					if($freq_type == 'year' && empty($bymonth)){
						$month_start = mktime(12,0,0,1,0,$year);
						$month_end   = mktime(12,0,0,1,1,$year+1);
					}
					foreach($week_arr as $week){
						#echo "<pre>$summary ".$byday_arr[1].$week.$on_day." st:".date("Ymd",$month_start)." t:".date("Ymd",$time)."\n";
						if($byday_arr[1] == '-') $next_date_time = strtotime($byday_arr[1].$week.$on_day,$month_end);
						else $next_date_time = strtotime($byday_arr[1].$week.$on_day,$month_start);
						# check that we're still in the same month
						if (date("m",$next_date_time) == date("m",$time) ) $times[] = $next_date_time; 
					}
				}else{
					# byweekno should act like freq_type = week
					$next_date_time = strtotime("this $on_day",strtotime($the_sunday)) + (12 * 60 * 60);					
					$times[] = $next_date_time; 				
				}
				break;
			default:
				$month_start = strtotime(date("Ym01",$time));
				$next_date_time = strtotime($byday_arr[1].$byday_arr[2].$on_day, $month_start); 
		}
	}
	#echo "exp byday";dump_times($times);
	return $times;
}


function restrict_bymonth($times,$freq=''){
	global $bymonth, $byyearday;
	if (empty($bymonth) || !empty($byyearday)) return $times;
	$new_times=array();
	foreach ($times as $time){ 
		if(in_array(date("m", $time), $bymonth)) $new_times[] = $time;
	}	
	return $new_times;
}
function restrict_byweekno($times,$freq=''){
	global $byweekno;
	if(empty($byweekno)) return $times;
	$new_times=array();
	foreach ($times as $time) if(in_array(date("W", $time), $byweekno)) $new_times[] = $time;
	return $new_times;

}
function restrict_byyearday($times,$freq=''){
	global $byyearday;
	if(empty($byyearday)) return $times;
	$new_times=array();
	foreach ($times as $time){
		foreach ($byyearday as $yearday){
			if($yearday < 0){
				$yearday = 365 + $yearday +1;
				if(date("L",$time)) $yearday += 1;
			}	
			$yearday_arr[] = $yearday;
		}
		# date(z,$time) gives 0 for Jan 1
		if(in_array((date("z", $time)+1), $yearday_arr)) $new_times[] = $time;
	}	
	return $new_times;
}

function restrict_bymonthday($times,$freq=''){
	global $bymonthday;
	if(empty($bymonthday)) return $times;
	$new_times=array();
	foreach ($times as $time){
		foreach ($bymonthday as $monthday){
			if($monthday < 0) $monthday = date("t",$time) + $monthday +1;
			$monthday_arr[] = $monthday;
		}	
		if(in_array(date("j", $time), $monthday_arr)) $new_times[] = $time;
	}	
	return $new_times;
}
function restrict_byday($times,$freq=''){
	global $byday;
	if(empty($byday)) return $times;
	foreach($byday as $key=>$day) {
		/* set $byday_arr
				[0] => byday string, e.g. 4TH
				[1] => sign/modifier
				[2] => 4 number
				[3] => TH day abbr
		*/
		ereg ('([-\+]{0,1})?([0-9]{1})?([A-Z]{2})', $day, $byday_arr);
		$byday3[] = two2threeCharDays($byday_arr[3]);
	}
	$new_times=array();
	foreach ($times as $time) if(in_array(strtolower(date("D", $time)), $byday3)) $new_times[] = $time;
	return $new_times;	
}

function restrict_bysetpos($times,$freq=''){
	global $bysetpos;
	if(empty($bysetpos)) return $times;
	sort($times);
	$new_times=array(); 
	foreach($bysetpos as $setpos){
		$new_times[] = implode('',array_slice($times, $setpos, 1));
	}
	return $new_times;	
}

# for diagnostics
function dump_times($times){
	global $summary;
	echo "<pre>$summary times:";
	#var_dump($times);
	foreach($times as $time) echo "\ndate:".date("Y-m-d H:i:s",$time);
	echo "</pre>";
}
Back to Top