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
|
/*
* Copyright 2017 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "Firestore/Source/API/FIRTimestamp+Internal.h"
NS_ASSUME_NONNULL_BEGIN
static const int kNanosPerSecond = 1000000000;
@implementation FIRTimestamp (Internal)
#pragma mark - Internal public methods
- (NSString *)ISO8601String {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ss";
formatter.timeZone = [NSTimeZone timeZoneWithName:@"UTC"];
NSDate *secondsDate = [NSDate dateWithTimeIntervalSince1970:self.seconds];
NSString *secondsString = [formatter stringFromDate:secondsDate];
if (secondsString.length != 19) {
[NSException raise:@"Invalid ISO string" format:@"Invalid ISO string: %@", secondsString];
}
NSString *nanosString = [NSString stringWithFormat:@"%09d", self.nanoseconds];
return [NSString stringWithFormat:@"%@.%@Z", secondsString, nanosString];
}
@end
@implementation FIRTimestamp
#pragma mark - Constructors
+ (instancetype)timestampWithDate:(NSDate *)date {
double secondsDouble;
double fraction = modf(date.timeIntervalSince1970, &secondsDouble);
// GCP Timestamps always have non-negative nanos.
if (fraction < 0) {
fraction += 1.0;
secondsDouble -= 1.0;
}
int64_t seconds = (int64_t)secondsDouble;
int32_t nanos = (int32_t)(fraction * kNanosPerSecond);
return [[FIRTimestamp alloc] initWithSeconds:seconds nanoseconds:nanos];
}
+ (instancetype)timestampWithSeconds:(int64_t)seconds nanoseconds:(int32_t)nanoseconds {
return [[FIRTimestamp alloc] initWithSeconds:seconds nanoseconds:nanoseconds];
}
+ (instancetype)timestamp {
return [FIRTimestamp timestampWithDate:[NSDate date]];
}
- (instancetype)initWithSeconds:(int64_t)seconds nanoseconds:(int32_t)nanoseconds {
self = [super init];
if (self) {
if (nanoseconds < 0) {
[NSException raise:@"Invalid timestamp"
format:@"Timestamp nanoseconds out of range: %d", nanoseconds];
}
if (nanoseconds >= 1e9) {
[NSException raise:@"Invalid timestamp"
format:@"Timestamp nanoseconds out of range: %d", nanoseconds];
}
// Midnight at the beginning of 1/1/1 is the earliest timestamp supported.
if (seconds < -62135596800L) {
[NSException raise:@"Invalid timestamp"
format:@"Timestamp seconds out of range: %lld", seconds];
}
// This will break in the year 10,000.
if (seconds >= 253402300800L) {
[NSException raise:@"Invalid timestamp"
format:@"Timestamp seconds out of range: %lld", seconds];
}
_seconds = seconds;
_nanoseconds = nanoseconds;
}
return self;
}
#pragma mark - NSObject methods
- (BOOL)isEqual:(id)object {
if (self == object) {
return YES;
}
if (![object isKindOfClass:[FIRTimestamp class]]) {
return NO;
}
return [self isEqualToTimestamp:(FIRTimestamp *)object];
}
- (NSUInteger)hash {
return (NSUInteger)((self.seconds >> 32) ^ self.seconds ^ self.nanoseconds);
}
- (NSString *)description {
return [NSString stringWithFormat:@"FIRTimestamp: seconds=%lld nanoseconds=%d>", self.seconds,
self.nanoseconds];
}
/** Implements NSCopying without actually copying because timestamps are immutable. */
- (id)copyWithZone:(NSZone *_Nullable)zone {
return self;
}
#pragma mark - Public methods
- (NSDate *)dateValue {
NSTimeInterval interval = (NSTimeInterval)self.seconds + ((NSTimeInterval)self.nanoseconds) / 1e9;
return [NSDate dateWithTimeIntervalSince1970:interval];
}
- (NSComparisonResult)compare:(FIRTimestamp *)other {
if (self.seconds < other.seconds) {
return NSOrderedAscending;
} else if (self.seconds > other.seconds) {
return NSOrderedDescending;
}
if (self.nanoseconds < other.nanoseconds) {
return NSOrderedAscending;
} else if (self.nanoseconds > other.nanoseconds) {
return NSOrderedDescending;
}
return NSOrderedSame;
}
#pragma mark - Private methods
- (BOOL)isEqualToTimestamp:(FIRTimestamp *)other {
return [self compare:other] == NSOrderedSame;
}
@end
NS_ASSUME_NONNULL_END
|
