[26] | 1 | //
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| 2 | // PSAlarms.m
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| 3 | // Pester
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| 4 | //
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| 5 | // Created by Nicholas Riley on Fri Oct 11 2002.
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| 6 | // Copyright (c) 2002 Nicholas Riley. All rights reserved.
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| 7 | //
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| 8 |
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| 9 | #import "PSAlarms.h"
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| 10 | #import "PSAlarm.h"
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| 11 |
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| 12 | NSString * const PSAlarmsDidChangeNotification = @"PSAlarmsDidChangeNotification";
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[28] | 13 | NSString * const PSAlarmsNextAlarmDidChangeNotification = @"PSAlarmsNextAlarmDidChangeNotification";
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[26] | 14 |
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| 15 | static NSString * const PSPendingAlarms = @"Pester pending alarms"; // NSUserDefaults key
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| 16 |
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| 17 | static PSAlarms *PSAlarmsAllAlarms = nil;
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| 18 |
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[28] | 19 | @interface PSAlarms (Private)
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| 20 |
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| 21 | - (void)_updateNextAlarm;
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| 22 |
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| 23 | @end
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| 24 |
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[26] | 25 | @implementation PSAlarms
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| 26 |
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[28] | 27 | + (void)setUp;
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[26] | 28 | {
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| 29 | if (PSAlarmsAllAlarms == nil) {
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| 30 | PSAlarmsAllAlarms = [[self alloc] init];
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[28] | 31 | [PSAlarmsAllAlarms _updateNextAlarm]; // only generate notifications after singleton established
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[26] | 32 | }
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| 33 | }
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| 34 |
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| 35 | + (PSAlarms *)allAlarms;
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| 36 | {
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[28] | 37 | NSAssert(PSAlarmsAllAlarms != nil, @"Attempt to use +[PSAlarms allAlarms] before setup complete");
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[26] | 38 | return PSAlarmsAllAlarms;
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| 39 | }
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| 40 |
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[28] | 41 | - (void)_updateNextAlarm;
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| 42 | {
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| 43 | NSEnumerator *e;
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| 44 | PSAlarm *alarm, *oldNextAlarm = nextAlarm;
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| 45 | [nextAlarm release];
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| 46 | nextAlarm = nil;
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| 47 | // sort alarms so earliest is first
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| 48 | [alarms sortUsingSelector: @selector(compare:)];
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| 49 | // find first un-expired alarm
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| 50 | e = [alarms objectEnumerator];
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| 51 | while ( (alarm = [e nextObject]) != nil) {
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| 52 | if ([alarm isValid]) {
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| 53 | nextAlarm = [alarm retain];
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| 54 | break;
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| 55 | }
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| 56 | }
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| 57 | if (oldNextAlarm != nextAlarm)
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| 58 | [[NSNotificationCenter defaultCenter] postNotificationName: PSAlarmsNextAlarmDidChangeNotification object: nextAlarm];
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| 59 | }
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| 60 |
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[26] | 61 | - (id)init;
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| 62 | {
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| 63 | if ( (self = [super init]) != nil) {
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[28] | 64 | alarms = [[NSMutableArray alloc] init];
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[26] | 65 | NS_DURING
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[28] | 66 | NSArray *alarmsData = [[NSUserDefaults standardUserDefaults] arrayForKey: PSPendingAlarms];
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| 67 | NSEnumerator *e = [alarmsData objectEnumerator];
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| 68 | NSData *alarmData;
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| 69 | PSAlarm *alarm;
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| 70 | while ( (alarmData = [e nextObject]) != nil) {
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| 71 | alarm = [NSUnarchiver unarchiveObjectWithData: alarmData];
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| 72 | if (alarm != nil)
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| 73 | [alarms addObject: alarm];
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[26] | 74 | }
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| 75 | NS_HANDLER
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| 76 | // XXX need better error handling here, don't stomp on data
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| 77 | NSLog(@"An error occurred while attempting to restore the alarm list: %@", localException);
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| 78 | NS_ENDHANDLER
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| 79 | [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(_alarmTimerSet:) name: PSAlarmTimerSetNotification object: nil];
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| 80 | [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(_alarmTimerExpired:) name: PSAlarmTimerExpiredNotification object: nil];
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| 81 | }
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| 82 | return self;
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| 83 | }
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| 84 |
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| 85 | - (void)dealloc;
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| 86 | {
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[28] | 87 | [alarms release];
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[26] | 88 | [[NSNotificationCenter defaultCenter] removeObserver: self];
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| 89 | [super dealloc];
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| 90 | }
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| 91 |
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| 92 | - (void)_changed;
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| 93 | {
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[28] | 94 | NSMutableArray *alarmsData = [[NSMutableArray alloc] init];
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[26] | 95 | NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
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[28] | 96 | NSEnumerator *e;
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| 97 | PSAlarm *alarm;
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| 98 | [self _updateNextAlarm];
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| 99 | // NSLog(@"PSAlarms _changed:\n%@", alarms);
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| 100 | // archive
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| 101 | e = [alarms objectEnumerator];
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| 102 | while ( (alarm = [e nextObject]) != nil) {
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| 103 | [alarmsData addObject: [NSArchiver archivedDataWithRootObject: alarm]];
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| 104 | }
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| 105 | [defaults setObject: alarmsData forKey: PSPendingAlarms];
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[26] | 106 | [defaults synchronize];
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[28] | 107 | [alarmsData release];
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[26] | 108 | [[NSNotificationCenter defaultCenter] postNotificationName: PSAlarmsDidChangeNotification object: self];
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| 109 | }
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| 110 |
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| 111 | - (void)_alarmTimerExpired:(NSNotification *)notification;
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| 112 | {
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| 113 | [alarms removeObject: [notification object]];
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| 114 | [self _changed];
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| 115 | }
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| 116 |
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| 117 | - (void)_alarmTimerSet:(NSNotification *)notification;
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| 118 | {
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| 119 | [alarms addObject: [notification object]];
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| 120 | [self _changed];
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| 121 | }
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| 122 |
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[28] | 123 | - (PSAlarm *)nextAlarm;
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| 124 | {
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| 125 | return nextAlarm;
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| 126 | }
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| 127 |
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[26] | 128 | - (int)alarmCount;
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| 129 | {
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| 130 | return [alarms count];
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| 131 | }
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| 132 |
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| 133 | - (PSAlarm *)alarmAtIndex:(int)index;
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| 134 | {
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| 135 | return [alarms objectAtIndex: index];
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| 136 | }
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| 137 |
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| 138 | - (void)removeAlarmAtIndex:(int)index;
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| 139 | {
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[28] | 140 | [(PSAlarm *)[alarms objectAtIndex: index] cancel];
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[26] | 141 | [alarms removeObjectAtIndex: index];
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| 142 | }
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| 143 |
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| 144 | - (void)removeAlarmsAtIndices:(NSArray *)indices;
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| 145 | {
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| 146 | NSEnumerator *e = [indices objectEnumerator];
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| 147 | NSNumber *n;
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[28] | 148 | int indexCount = [indices count], i = 0, alarmIndex;
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[26] | 149 | int *indexArray = (int *)malloc(indexCount * sizeof(int));
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| 150 | NS_DURING
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| 151 | while ( (n = [e nextObject]) != nil) {
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[28] | 152 | alarmIndex = [n intValue];
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| 153 | [(PSAlarm *)[alarms objectAtIndex: alarmIndex] cancel];
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| 154 | indexArray[i] = alarmIndex;
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[26] | 155 | i++;
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| 156 | }
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| 157 | [alarms removeObjectsFromIndices: indexArray numIndices: indexCount];
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| 158 | [self _changed];
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| 159 | NS_HANDLER
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| 160 | free(indexArray);
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| 161 | [self _changed];
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| 162 | [localException raise];
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| 163 | NS_ENDHANDLER
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| 164 | }
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| 165 |
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| 166 | @end
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