From 38377420f9df74a4522661cb154d06e0e4cd4215 Mon Sep 17 00:00:00 2001
From: helge <helge@e4a50df8-12e2-0310-a44c-efbce7f8a7e3>
Date: Mon, 19 Sep 2005 22:42:22 +0000
Subject: [PATCH] added rule calculation

git-svn-id: http://svn.opengroupware.org/SOPE/trunk@1118 e4a50df8-12e2-0310-a44c-efbce7f8a7e3
---
 sope-ical/samples/ievalrrule.m | 113 +++++++++++++++++++++++++++++----
 1 file changed, 100 insertions(+), 13 deletions(-)

diff --git a/sope-ical/samples/ievalrrule.m b/sope-ical/samples/ievalrrule.m
index 1ce1111d..41fd4d3d 100644
--- a/sope-ical/samples/ievalrrule.m
+++ b/sope-ical/samples/ievalrrule.m
@@ -20,36 +20,114 @@
 */
 
 #include <NGiCal/iCalRecurrenceRule.h>
+#include <NGiCal/iCalRecurrenceCalculator.h>
+#include <NGExtensions/NGCalendarDateRange.h>
 #include "common.h"
 
+static NSCalendarDate *dateForString(NSString *_s) {
+  // copied from ogo-chkaptconflicts, maybe move to NGExtensions?
+  static NSCalendarDate *now = nil;
+  static NSCalendarDate *mon = nil;
+  
+  if (now == nil) now = [[NSCalendarDate date] retain];
+  if (mon == nil) mon = [[now mondayOfWeek] retain];
+  _s = [_s lowercaseString];
+  
+  if ([_s isEqualToString:@"now"])       return now;
+  if ([_s isEqualToString:@"tomorrow"])  return [now tomorrow];
+  if ([_s isEqualToString:@"yesterday"]) return [now yesterday];
+  
+  if ([_s hasPrefix:@"mon"]) return mon;
+  if ([_s hasPrefix:@"tue"]) return [mon dateByAddingYears:0 months:0 days:1];
+  if ([_s hasPrefix:@"wed"]) return [mon dateByAddingYears:0 months:0 days:2];
+  if ([_s hasPrefix:@"thu"]) return [mon dateByAddingYears:0 months:0 days:3];
+  if ([_s hasPrefix:@"fri"]) return [mon dateByAddingYears:0 months:0 days:4];
+  if ([_s hasPrefix:@"sat"]) return [mon dateByAddingYears:0 months:0 days:5];
+  if ([_s hasPrefix:@"sun"]) return [mon dateByAddingYears:0 months:0 days:6];
+  
+  switch ([_s length]) {
+  case 6:
+    return [NSCalendarDate dateWithString:_s calendarFormat:@"%Y%m"];
+  case 8:
+    return [NSCalendarDate dateWithString:_s calendarFormat:@"%Y%m%d"];
+  case 10:
+    return [NSCalendarDate dateWithString:_s calendarFormat:@"%Y%-m-%d"];
+  case 13:
+    return [NSCalendarDate dateWithString:_s calendarFormat:@"%Y%m%d %H%M"];
+  case 14:
+    return [NSCalendarDate dateWithString:_s calendarFormat:@"%Y%m%d %H:%M"];
+  case 16:
+    return [NSCalendarDate dateWithString:_s calendarFormat:@"%Y-%m-%d %H:%M"];
+  default:
+    return nil;
+  }
+}
+
 static int usage(NSArray *args) {
   fprintf(stderr,
-	  "usage: %s <rrule> <startdate> <enddate>\n"
+	  "usage: %s <rrule> <startdate> <enddate> <cycleend>\n"
 	  "\n"
 	  "sample:\n"
-	  "  %s 'FREQ=MONTHLY;BYDAY=2TU' 20050901 20060301\n",
+	  "  %s 'FREQ=MONTHLY;BYDAY=2TU' '20050901 14:00' '20050901 15:00' "
+	  "20060921\n",
 	  [[args objectAtIndex:0] cString],
 	  [[args objectAtIndex:0] cString]);
   return 1;
 }
 
+static void printInstances(NSArray *instances) {
+  unsigned i, count;
+  
+  if ((count = [instances count]) == 0) {
+    printf("no reccurrences in given range\n");
+    return;
+  }
+  
+  for (i = 0; i < count; i++) {
+    NGCalendarDateRange *instance;
+    NSString *s;
+    
+    instance = [instances objectAtIndex:i];
+
+    s = [[instance startDate] descriptionWithCalendarFormat:
+				@"%a, %Y-%m-%d at %H:%M"];
+    printf("%s - ", [s cString]);
+
+    s = [[instance endDate] descriptionWithCalendarFormat:
+			      [[instance startDate] isDateOnSameDay:
+						      [instance endDate]]
+			    ? @"%H:%M"
+			    : @"%a, %Y-%m-%d at %H:%M"];
+    printf("%s\n", [s cString]);
+  }
+}
+
 static int runIt(NSArray *args) {
-  iCalRecurrenceRule *rrule;
-  NSCalendarDate *from, *to;
-  NSString *pattern;
-  NSString *s;
+  iCalRecurrenceCalculator *cpu;
+  iCalRecurrenceRule  *rrule;
+  NGCalendarDateRange *startRange, *calcRange;
+  NSCalendarDate      *from, *to, *cycleTo;
+  NSString            *pattern;
+  NSArray             *instances;
   
-  if ([args count] < 4)
+  if ([args count] < 5)
     return usage(args);
   
   pattern = [args objectAtIndex:1];
-  s       = [[args objectAtIndex:2] stringByAppendingString:@" 00:00"];
-  from    = [NSCalendarDate dateWithString:s calendarFormat:@"%Y%m%d %H:%M"];
-  s       = [[args objectAtIndex:3] stringByAppendingString:@" 23:59"];
-  to      = [NSCalendarDate dateWithString:s calendarFormat:@"%Y%m%d %H:%M"];
+  from    = dateForString([args objectAtIndex:2]);
+  to      = dateForString([args objectAtIndex:3]);
+  cycleTo = dateForString([args objectAtIndex:4]);
   
-  if (from == nil || to == nil || ![pattern isNotEmpty])
+  if (from == nil || to == nil || cycleTo == nil || ![pattern isNotEmpty])
     return usage(args);
+  
+  startRange =
+    [NGCalendarDateRange calendarDateRangeWithStartDate:from endDate:to];
+  
+  calcRange =
+    [NGCalendarDateRange calendarDateRangeWithStartDate:from endDate:cycleTo];
+  
+  /* parse rrule */
 
   if ((rrule = [[iCalRecurrenceRule alloc] initWithString:pattern]) == nil) {
     usage(args);
@@ -58,9 +136,18 @@ static int runIt(NSArray *args) {
     return 2;
   }
   
-  NSLog(@"from: %@ to: %@", from, to);
+  NSLog(@"from: %@ to: %@, cycle %@", from, to, cycleTo);
   NSLog(@"rrule: %@", rrule);
   
+  /* calculate */
+  
+  cpu = [iCalRecurrenceCalculator 
+	  recurrenceCalculatorForRecurrenceRule:rrule
+	  withFirstInstanceCalendarDateRange:startRange];
+  
+  instances = [cpu recurrenceRangesWithinCalendarDateRange:calcRange];
+  printInstances(instances);
+  
   return 0;
 }
 
-- 
2.39.5