1 | // |
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2 | // PSAlarm.m |
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3 | // Pester |
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4 | // |
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5 | // Created by Nicholas Riley on Wed Oct 09 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 "PSAlarm.h" |
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10 | |
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11 | NSString * const PSAlarmTimerSetNotification = @"PSAlarmTimerSetNotification"; |
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12 | NSString * const PSAlarmTimerExpiredNotification = @"PSAlarmTimerExpiredNotification"; |
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13 | |
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14 | @implementation PSAlarm |
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15 | |
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16 | - (void)dealloc; |
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17 | { |
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18 | // NSLog(@"DEALLOC %@", self); |
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19 | alarmType = PSAlarmInvalid; |
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20 | [alarmDate release]; alarmDate = nil; |
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21 | [alarmMessage release]; alarmMessage = nil; |
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22 | [invalidMessage release]; invalidMessage = nil; |
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23 | [timer release]; timer = nil; |
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24 | [super dealloc]; |
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25 | } |
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26 | |
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27 | - (void)_setAlarmDate:(NSCalendarDate *)aDate; |
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28 | { |
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29 | if (alarmDate != aDate) { |
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30 | [alarmDate release]; |
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31 | alarmDate = nil; |
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32 | alarmDate = [aDate retain]; |
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33 | } |
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34 | } |
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35 | |
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36 | - (void)_invalidate:(NSString *)aMessage; |
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37 | { |
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38 | alarmType = PSAlarmInvalid; |
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39 | if (aMessage != invalidMessage) { |
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40 | [invalidMessage release]; |
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41 | invalidMessage = nil; |
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42 | [self _setAlarmDate: nil]; |
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43 | alarmInterval = 0; |
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44 | invalidMessage = [aMessage retain]; |
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45 | } |
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46 | } |
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47 | |
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48 | - (void)_validateForType:(PSAlarmType)type; |
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49 | { |
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50 | [invalidMessage release]; |
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51 | invalidMessage = nil; |
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52 | alarmType = type; |
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53 | } |
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54 | |
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55 | - (void)_setDateFromInterval; |
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56 | { |
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57 | [alarmDate release]; alarmDate = nil; |
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58 | alarmDate = [NSCalendarDate dateWithTimeIntervalSinceNow: alarmInterval]; |
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59 | [alarmDate retain]; |
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60 | [self _validateForType: PSAlarmInterval]; |
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61 | } |
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62 | |
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63 | - (void)setInterval:(NSTimeInterval)anInterval; |
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64 | { |
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65 | alarmInterval = anInterval; |
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66 | if (alarmInterval <= 0) { |
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67 | [self _invalidate: @"Please specify an alarm interval."]; return; |
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68 | } |
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69 | [self _setDateFromInterval]; |
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70 | } |
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71 | |
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72 | - (void)_setIntervalFromDate; |
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73 | { |
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74 | alarmInterval = [alarmDate timeIntervalSinceNow]; |
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75 | if (alarmInterval <= 0) { |
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76 | [self _invalidate: @"Please specify an alarm time in the future."]; |
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77 | return; |
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78 | } |
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79 | [self _validateForType: PSAlarmDate]; |
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80 | } |
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81 | |
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82 | - (void)setForDateAtTime:(NSCalendarDate *)dateTime; |
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83 | { |
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84 | [self _setAlarmDate: dateTime]; |
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85 | [self _setIntervalFromDate]; |
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86 | } |
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87 | |
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88 | - (void)setForDate:(NSDate *)date atTime:(NSDate *)time; |
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89 | { |
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90 | NSCalendarDate *calTime, *calDate; |
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91 | if (time == nil && date == nil) { |
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92 | [self _invalidate: @"Please specify an alarm date and time."]; return; |
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93 | } |
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94 | if (time == nil) { |
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95 | [self _invalidate: @"Please specify an alarm time."]; return; |
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96 | } |
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97 | if (date == nil) { |
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98 | [self _invalidate: @"Please specify an alarm date."]; return; |
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99 | } |
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100 | // XXX if calTime's date is different from the default date, complain |
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101 | calTime = [NSCalendarDate dateWithTimeIntervalSinceReferenceDate: [time timeIntervalSinceReferenceDate]]; |
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102 | calDate = [NSCalendarDate dateWithTimeIntervalSinceReferenceDate: [date timeIntervalSinceReferenceDate]]; |
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103 | if (calTime == nil || calDate == nil) { |
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104 | [self _invalidate: @"Please specify a reasonable date and time."]; |
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105 | } |
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106 | [self setForDateAtTime: |
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107 | [[[NSCalendarDate alloc] initWithYear: [calDate yearOfCommonEra] |
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108 | month: [calDate monthOfYear] |
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109 | day: [calDate dayOfMonth] |
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110 | hour: [calTime hourOfDay] |
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111 | minute: [calTime minuteOfHour] |
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112 | second: [calTime secondOfMinute] |
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113 | timeZone: nil] autorelease]]; |
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114 | } |
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115 | |
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116 | - (BOOL)isValid; |
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117 | { |
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118 | if (alarmType == PSAlarmDate) [self _setIntervalFromDate]; |
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119 | return (alarmType != PSAlarmInvalid); |
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120 | } |
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121 | |
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122 | - (void)setMessage:(NSString *)aMessage; |
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123 | { |
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124 | if (aMessage != alarmMessage) { |
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125 | [alarmMessage release]; |
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126 | alarmMessage = nil; |
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127 | alarmMessage = [aMessage retain]; |
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128 | } |
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129 | } |
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130 | |
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131 | - (NSString *)message; |
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132 | { |
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133 | if (alarmMessage == nil || [alarmMessage isEqualToString: @""]) |
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134 | return @"Alarm!"; |
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135 | return alarmMessage; |
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136 | } |
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137 | |
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138 | - (NSString *)invalidMessage; |
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139 | { |
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140 | if (invalidMessage == nil) return @""; |
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141 | return invalidMessage; |
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142 | } |
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143 | |
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144 | - (NSDate *)date; |
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145 | { |
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146 | if (alarmType == PSAlarmInterval) [self _setDateFromInterval]; |
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147 | return alarmDate; |
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148 | } |
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149 | |
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150 | - (NSTimeInterval)interval; |
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151 | { |
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152 | if (alarmType == PSAlarmSet) return [timer timeInterval]; // XXX counts down? |
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153 | if (alarmType == PSAlarmDate) [self _setIntervalFromDate]; |
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154 | return alarmInterval; |
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155 | } |
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156 | |
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157 | - (BOOL)setTimer; |
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158 | { |
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159 | switch (alarmType) { |
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160 | case PSAlarmDate: if (![self isValid]) return NO; |
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161 | case PSAlarmInterval: |
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162 | timer = [NSTimer scheduledTimerWithTimeInterval: alarmInterval |
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163 | target: self |
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164 | selector: @selector(_timerExpired:) |
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165 | userInfo: nil |
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166 | repeats: NO]; |
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167 | if (timer != nil) { |
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168 | alarmType = PSAlarmSet; |
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169 | [[NSNotificationCenter defaultCenter] postNotificationName: PSAlarmTimerSetNotification object: self]; |
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170 | return YES; |
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171 | } |
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172 | default: |
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173 | return NO; |
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174 | } |
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175 | } |
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176 | |
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177 | - (void)cancel; |
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178 | { |
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179 | [timer release]; timer = nil; |
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180 | } |
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181 | |
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182 | - (void)_timerExpired:(NSTimer *)aTimer; |
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183 | { |
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184 | [[NSNotificationCenter defaultCenter] postNotificationName: PSAlarmTimerExpiredNotification object: self]; |
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185 | timer = nil; |
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186 | [timer release]; |
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187 | } |
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188 | |
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189 | - (NSString *)_alarmTypeString; |
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190 | { |
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191 | switch (alarmType) { |
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192 | case PSAlarmDate: return @"PSAlarmDate"; |
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193 | case PSAlarmInterval: return @"PSAlarmInterval"; |
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194 | case PSAlarmSet: return @"PSAlarmSet"; |
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195 | case PSAlarmInvalid: return @"PSAlarmInvalid"; |
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196 | default: return [NSString stringWithFormat: @"<unknown: %u>", alarmType]; |
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197 | } |
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198 | } |
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199 | |
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200 | - (NSComparisonResult)compare:(PSAlarm *)otherAlarm; |
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201 | { |
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202 | return [[self date] compare: [otherAlarm date]]; |
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203 | } |
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204 | |
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205 | - (NSString *)description; |
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206 | { |
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207 | return [NSString stringWithFormat: @"%@: type %@ date %@ interval %.1f%@", |
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208 | [super description], [self _alarmTypeString], alarmDate, alarmInterval, |
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209 | (alarmType == PSAlarmInvalid ? |
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210 | [NSString stringWithFormat: @"\ninvalid message: %@", invalidMessage] |
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211 | : (alarmType == PSAlarmSet ? |
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212 | [NSString stringWithFormat: @"\ntimer: %@", timer] : @""))]; |
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213 | } |
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214 | |
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215 | - (void)encodeWithCoder:(NSCoder *)coder; |
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216 | { |
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217 | if (![self isValid]) return; |
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218 | [coder encodeValueOfObjCType: @encode(PSAlarmType) at: &alarmType]; |
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219 | switch (alarmType) { |
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220 | case PSAlarmDate: |
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221 | case PSAlarmSet: |
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222 | [coder encodeObject: alarmDate]; |
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223 | break; |
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224 | case PSAlarmInterval: |
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225 | [coder encodeValueOfObjCType: @encode(NSTimeInterval) at: &alarmInterval]; |
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226 | break; |
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227 | default: |
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228 | break; |
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229 | } |
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230 | [coder encodeObject: alarmMessage]; |
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231 | return; |
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232 | } |
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233 | |
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234 | - (id)initWithCoder:(NSCoder *)coder; |
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235 | { |
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236 | if ( (self = [super init]) != nil) { |
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237 | [coder decodeValueOfObjCType: @encode(PSAlarmType) at: &alarmType]; |
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238 | switch (alarmType) { |
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239 | case PSAlarmDate: |
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240 | case PSAlarmSet: |
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241 | [self _setAlarmDate: [coder decodeObject]]; |
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242 | break; |
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243 | case PSAlarmInterval: |
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244 | [coder decodeValueOfObjCType: @encode(NSTimeInterval) at: &alarmInterval]; |
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245 | break; |
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246 | default: |
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247 | break; |
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248 | } |
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249 | [self setMessage: [coder decodeObject]]; |
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250 | if (alarmType == PSAlarmSet) { |
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251 | alarmType = PSAlarmDate; |
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252 | [self setTimer]; |
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253 | } |
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254 | } |
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255 | return self; |
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256 | } |
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257 | |
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258 | @end |
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