Make FSTTimestamp into a public Firestore class (#698)

- FSTTimestamp is now FIRTimestamp, under Firestore/Source/{Public,API}. This is a temporary solution; eventually, FIRTimestamp is supposed to live somewhere under Firebase;
- move most internal Timestamp methods to the public header (the only exception is ISOString).

1 files changed, 8 insertions, 7 deletions

diff --git a/Firestore/Source/Model/FSTFieldValue.mm b/Firestore/Source/Model/FSTFieldValue.mm
index 3f3548c..5ef64e1 100644
--- a/Firestore/Source/Model/FSTFieldValue.mm
+++ b/Firestore/Source/Model/FSTFieldValue.mm
@@ -16,12 +16,13 @@
 
 #import "Firestore/Source/Model/FSTFieldValue.h"
 
+#import "FIRTimestamp.h"
+
 #include "Firestore/core/src/firebase/firestore/util/comparison.h"
 #include "Firestore/core/src/firebase/firestore/util/string_apple.h"
 
 #import "Firestore/Source/API/FIRGeoPoint+Internal.h"
 #import "Firestore/Source/API/FIRSnapshotOptions+Internal.h"
-#import "Firestore/Source/Core/FSTTimestamp.h"
 #import "Firestore/Source/Model/FSTDocumentKey.h"
 #import "Firestore/Source/Model/FSTPath.h"
 #import "Firestore/Source/Util/FSTAssert.h"
@@ -424,19 +425,19 @@ struct Comparator<NSString *> {
 #pragma mark - FSTTimestampValue
 
 @interface FSTTimestampValue ()
-@property(nonatomic, strong, readonly) FSTTimestamp *internalValue;
+@property(nonatomic, strong, readonly) FIRTimestamp *internalValue;
 @end
 
 @implementation FSTTimestampValue
 
-+ (instancetype)timestampValue:(FSTTimestamp *)value {
++ (instancetype)timestampValue:(FIRTimestamp *)value {
   return [[FSTTimestampValue alloc] initWithValue:value];
 }
 
-- (id)initWithValue:(FSTTimestamp *)value {
+- (id)initWithValue:(FIRTimestamp *)value {
   self = [super init];
   if (self) {
-    _internalValue = value;  // FSTTimestamp is immutable.
+    _internalValue = value;  // FIRTimestamp is immutable.
   }
   return self;
 }
@@ -476,13 +477,13 @@ struct Comparator<NSString *> {
 
 @implementation FSTServerTimestampValue
 
-+ (instancetype)serverTimestampValueWithLocalWriteTime:(FSTTimestamp *)localWriteTime
++ (instancetype)serverTimestampValueWithLocalWriteTime:(FIRTimestamp *)localWriteTime
                                          previousValue:(nullable FSTFieldValue *)previousValue {
   return [[FSTServerTimestampValue alloc] initWithLocalWriteTime:localWriteTime
                                                    previousValue:previousValue];
 }
 
-- (id)initWithLocalWriteTime:(FSTTimestamp *)localWriteTime
+- (id)initWithLocalWriteTime:(FIRTimestamp *)localWriteTime
                previousValue:(nullable FSTFieldValue *)previousValue {
   self = [super init];
   if (self) {