react-native-firebase/ios/RNFirebase/database/RNFirebaseDatabase.m

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#import "RNFirebaseDatabase.h"
#if __has_include(<FirebaseDatabase/FIRDatabase.h>)
#import "RNFirebaseDatabaseReference.h"
#import "RNFirebaseEvents.h"
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@implementation RNFirebaseDatabase
RCT_EXPORT_MODULE();
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// TODO document methods
- (id)init {
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self = [super init];
if (self != nil) {
_dbReferences = [[NSMutableDictionary alloc] init];
_transactions = [[NSMutableDictionary alloc] init];
_transactionQueue = dispatch_queue_create("io.invertase.react-native-firebase", DISPATCH_QUEUE_CONCURRENT);
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}
return self;
}
RCT_EXPORT_METHOD(goOnline:
(NSString *) appName) {
[[RNFirebaseDatabase getDatabaseForApp:appName] goOnline];
}
RCT_EXPORT_METHOD(goOffline:
(NSString *) appName) {
[[RNFirebaseDatabase getDatabaseForApp:appName] goOffline];
}
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RCT_EXPORT_METHOD(setPersistence:
(NSString *) appName
state:
(BOOL) state) {
[RNFirebaseDatabase getDatabaseForApp:appName].persistenceEnabled = state;
}
RCT_EXPORT_METHOD(keepSynced:
(NSString *) appName
refId:
(nonnull
NSNumber *) refId
path:(NSString *) path
modifiers:(NSArray *) modifiers
state:(BOOL) state) {
FIRDatabaseQuery *query = [self getInternalReferenceForApp:appName refId:refId path:path modifiers:modifiers keep:false].query;
[query keepSynced:state];
}
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RCT_EXPORT_METHOD(transactionTryCommit:
(NSString *) appName
transactionId:
(nonnull
NSNumber *) transactionId
updates:(NSDictionary *) updates) {
__block NSMutableDictionary *transactionState;
dispatch_sync(_transactionQueue, ^{
transactionState = _transactions[transactionId];
});
if (!transactionState) {
NSLog(@"tryCommitTransaction for unknown ID %@", transactionId);
return;
}
dispatch_semaphore_t sema = [transactionState valueForKey:@"semaphore"];
BOOL abort = [[updates valueForKey:@"abort"] boolValue];
if (abort) {
[transactionState setValue:@true forKey:@"abort"];
} else {
id newValue = [updates valueForKey:@"value"];
[transactionState setValue:newValue forKey:@"value"];
}
dispatch_semaphore_signal(sema);
}
RCT_EXPORT_METHOD(transactionStart:
(NSString *) appName
path:
(NSString *) path
transactionId:
(nonnull
NSNumber *) transactionId
applyLocally:(BOOL) applyLocally) {
dispatch_async(_transactionQueue, ^{
NSMutableDictionary *transactionState = [NSMutableDictionary new];
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
transactionState[@"semaphore"] = sema;
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref runTransactionBlock:^FIRTransactionResult * _Nonnull(FIRMutableData *
_Nonnull currentData) {
dispatch_barrier_async(_transactionQueue, ^{
[_transactions setValue:transactionState forKey:transactionId];
NSDictionary *updateMap = [self createTransactionUpdateMap:appName transactionId:transactionId updatesData:currentData];
[self sendEventWithName:DATABASE_TRANSACTION_EVENT body:updateMap];
});
// wait for the js event handler to call tryCommitTransaction
// this wait occurs on the Firebase Worker Queue
// so if the tryCommitTransaction fails to signal the semaphore
// no further blocks will be executed by Firebase until the timeout expires
dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, 30 * NSEC_PER_SEC);
BOOL timedout = dispatch_semaphore_wait(sema, delayTime) != 0;
BOOL abort = [transactionState valueForKey:@"abort"] || timedout;
id value = [transactionState valueForKey:@"value"];
dispatch_barrier_async(_transactionQueue, ^{
[_transactions removeObjectForKey:transactionId];
});
if (abort) {
return [FIRTransactionResult abort];
} else {
currentData.value = value;
return [FIRTransactionResult successWithValue:currentData];
}
}
andCompletionBlock:
^(NSError *_Nullable databaseError, BOOL committed, FIRDataSnapshot *_Nullable snapshot) {
NSDictionary *resultMap = [self createTransactionResultMap:appName transactionId:transactionId error:databaseError committed:committed snapshot:snapshot];
[self sendEventWithName:DATABASE_TRANSACTION_EVENT body:resultMap];
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}
withLocalEvents:
applyLocally];
});
}
RCT_EXPORT_METHOD(onDisconnectSet:
(NSString *) appName
path:
(NSString *) path
props:
(NSDictionary *) props
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref onDisconnectSetValue:props[@"value"] withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
}];
}
RCT_EXPORT_METHOD(onDisconnectUpdate:
(NSString *) appName
path:
(NSString *) path
props:
(NSDictionary *) props
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref onDisconnectUpdateChildValues:props withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
}];
}
RCT_EXPORT_METHOD(onDisconnectRemove:
(NSString *) appName
path:
(NSString *) path
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref onDisconnectRemoveValueWithCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
}];
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}
RCT_EXPORT_METHOD(onDisconnectCancel:
(NSString *) appName
path:
(NSString *) path
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref cancelDisconnectOperationsWithCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
}];
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}
RCT_EXPORT_METHOD(set:
(NSString *) appName
path:
(NSString *) path
props:
(NSDictionary *) props
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref setValue:[props valueForKey:@"value"] withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
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}];
}
RCT_EXPORT_METHOD(setPriority:
(NSString *) appName
path:
(NSString *) path
priority:
(NSDictionary *) priority
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref setPriority:[priority valueForKey:@"value"] withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
}];
}
RCT_EXPORT_METHOD(setWithPriority:
(NSString *) appName
path:
(NSString *) path
data:
(NSDictionary *) data
priority:
(NSDictionary *) priority
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref setValue:[data valueForKey:@"value"] andPriority:[priority valueForKey:@"value"] withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
}];
}
RCT_EXPORT_METHOD(update:
(NSString *) appName
path:
(NSString *) path
props:
(NSDictionary *) props
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref updateChildValues:props withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
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}];
}
RCT_EXPORT_METHOD(remove:
(NSString *) appName
path:
(NSString *) path
resolver:
(RCTPromiseResolveBlock) resolve
rejecter:
(RCTPromiseRejectBlock) reject) {
FIRDatabaseReference *ref = [self getReferenceForAppPath:appName path:path];
[ref removeValueWithCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
[RNFirebaseDatabase handlePromise:resolve rejecter:reject databaseError:error];
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}];
}
RCT_EXPORT_METHOD(once:
(NSString *) appName
refId:
(nonnull
NSNumber *) refId
path:(NSString *) path
modifiers:(NSArray *) modifiers
eventName:(NSString *) eventName
resolver:(RCTPromiseResolveBlock) resolve
rejecter:(RCTPromiseRejectBlock) reject) {
RNFirebaseDatabaseReference *ref = [self getInternalReferenceForApp:appName refId:refId path:path modifiers:modifiers keep:false];
[ref addSingleEventHandler:eventName resolver:resolve rejecter:reject];
}
/*
* INTERNALS/UTILS
*/
+ (void)handlePromise:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject databaseError:(NSError *)databaseError {
if (databaseError != nil) {
NSDictionary *jsError = [RNFirebaseDatabase getJSError:databaseError];
reject([jsError valueForKey:@"code"], [jsError valueForKey:@"message"], databaseError);
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} else {
resolve([NSNull null]);
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}
}
+ (FIRDatabase *)getDatabaseForApp:(NSString *)appName {
FIRApp *app = [FIRApp appNamed:appName];
return [FIRDatabase databaseForApp:app];
}
- (FIRDatabaseReference *)getReferenceForAppPath:(NSString *)appName path:(NSString *)path {
return [[RNFirebaseDatabase getDatabaseForApp:appName] referenceWithPath:path];
}
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- (RNFirebaseDatabaseReference *)getInternalReferenceForApp:(NSString *)appName refId:(NSNumber *)refId path:(NSString *)path modifiers:(NSArray *)modifiers keep:(BOOL)keep {
RNFirebaseDatabaseReference *ref = _dbReferences[refId];
if (ref == nil) {
ref = [[RNFirebaseDatabaseReference alloc] initWithPathAndModifiers:self app:appName refId:refId refPath:path modifiers:modifiers];
if (keep) {
_dbReferences[refId] = ref;
}
}
return ref;
}
// TODO: Move to error util for use in other modules
+ (NSString *)getMessageWithService:(NSString *)message service:(NSString *)service fullCode:(NSString *)fullCode {
return [NSString stringWithFormat:@"%@: %@ (%@).", service, message, [fullCode lowercaseString]];
}
+ (NSString *)getCodeWithService:(NSString *)service code:(NSString *)code {
return [NSString stringWithFormat:@"%@/%@", [service uppercaseString], [code uppercaseString]];
}
+ (NSDictionary *)getJSError:(NSError *)nativeError {
NSMutableDictionary *errorMap = [[NSMutableDictionary alloc] init];
[errorMap setValue:@(nativeError.code) forKey:@"nativeErrorCode"];
[errorMap setValue:[nativeError localizedDescription] forKey:@"nativeErrorMessage"];
NSString *code;
NSString *message;
NSString *service = @"Database";
switch (nativeError.code) {
// iOS confirmed codes
case 1: // -3 on Android
code = [RNFirebaseDatabase getCodeWithService:service code:@"permission-denied"];
message = [RNFirebaseDatabase getMessageWithService:@"Client doesn't have permission to access the desired data." service:service fullCode:code];
break;
case 2: // -10 on Android
code = [RNFirebaseDatabase getCodeWithService:service code:@"unavailable"];
message = [RNFirebaseDatabase getMessageWithService:@"The service is unavailable." service:service fullCode:code];
break;
case 3: // -25 on Android
code = [RNFirebaseDatabase getCodeWithService:service code:@"write-cancelled"];
message = [RNFirebaseDatabase getMessageWithService:@"The write was canceled by the user." service:service fullCode:code];
break;
// TODO: Missing iOS equivalent codes
case -1:
code = [RNFirebaseDatabase getCodeWithService:service code:@"data-stale"];
message = [RNFirebaseDatabase getMessageWithService:@"The transaction needs to be run again with current data." service:service fullCode:code];
break;
case -2:
code = [RNFirebaseDatabase getCodeWithService:service code:@"failure"];
message = [RNFirebaseDatabase getMessageWithService:@"The server indicated that this operation failed." service:service fullCode:code];
break;
case -4:
code = [RNFirebaseDatabase getCodeWithService:service code:@"disconnected"];
message = [RNFirebaseDatabase getMessageWithService:@"The operation had to be aborted due to a network disconnect." service:service fullCode:code];
break;
case -6:
code = [RNFirebaseDatabase getCodeWithService:service code:@"expired-token"];
message = [RNFirebaseDatabase getMessageWithService:@"The supplied auth token has expired." service:service fullCode:code];
break;
case -7:
code = [RNFirebaseDatabase getCodeWithService:service code:@"invalid-token"];
message = [RNFirebaseDatabase getMessageWithService:@"The supplied auth token was invalid." service:service fullCode:code];
break;
case -8:
code = [RNFirebaseDatabase getCodeWithService:service code:@"max-retries"];
message = [RNFirebaseDatabase getMessageWithService:@"The transaction had too many retries." service:service fullCode:code];
break;
case -9:
code = [RNFirebaseDatabase getCodeWithService:service code:@"overridden-by-set"];
message = [RNFirebaseDatabase getMessageWithService:@"The transaction was overridden by a subsequent set." service:service fullCode:code];
break;
case -11:
code = [RNFirebaseDatabase getCodeWithService:service code:@"user-code-exception"];
message = [RNFirebaseDatabase getMessageWithService:@"User code called from the Firebase Database runloop threw an exception." service:service fullCode:code];
break;
case -24:
code = [RNFirebaseDatabase getCodeWithService:service code:@"network-error"];
message = [RNFirebaseDatabase getMessageWithService:@"The operation could not be performed due to a network error." service:service fullCode:code];
break;
default:
code = [RNFirebaseDatabase getCodeWithService:service code:@"unknown"];
message = [RNFirebaseDatabase getMessageWithService:@"An unknown error occurred." service:service fullCode:code];
break;
}
[errorMap setValue:code forKey:@"code"];
[errorMap setValue:message forKey:@"message"];
return errorMap;
}
- (NSDictionary *)createTransactionUpdateMap:(NSString *)appName transactionId:(NSNumber *)transactionId updatesData:(FIRMutableData *)updatesData {
NSMutableDictionary *updatesMap = [[NSMutableDictionary alloc] init];
[updatesMap setValue:transactionId forKey:@"id"];
[updatesMap setValue:@"update" forKey:@"type"];
[updatesMap setValue:appName forKey:@"appName"];
[updatesMap setValue:updatesData.value forKey:@"value"];
return updatesMap;
}
- (NSDictionary *)createTransactionResultMap:(NSString *)appName transactionId:(NSNumber *)transactionId error:(NSError *)error committed:(BOOL)committed snapshot:(FIRDataSnapshot *)snapshot {
NSMutableDictionary *resultMap = [[NSMutableDictionary alloc] init];
[resultMap setValue:transactionId forKey:@"id"];
[resultMap setValue:appName forKey:@"appName"];
// TODO: no timeout on iOS
[resultMap setValue:@(committed) forKey:@"committed"];
// TODO: no interrupted on iOS
if (error != nil) {
[resultMap setValue:@"error" forKey:@"type"];
[resultMap setValue:[RNFirebaseDatabase getJSError:error] forKey:@"error"];
// TODO: timeout error on iOS
} else {
[resultMap setValue:@"complete" forKey:@"type"];
[resultMap setValue:[RNFirebaseDatabaseReference snapshotToDict:snapshot] forKey:@"snapshot"];
}
return resultMap;
}
RCT_EXPORT_METHOD(on:(NSString *) appName args:(NSDictionary *) args) {
// todo
// RNFirebaseDatabaseReference *ref = [self getInternalReferenceForApp:appName refId:refId path:path modifiers:modifiers keep:false];
// TODO query identifier
// [ref addEventHandler:listenerId eventName:eventName];
}
/* TODO
RCT_EXPORT_METHOD(off:
(nonnull
NSNumber *) refId
listeners:(NSArray *) listeners
callback:(RCTResponseSenderBlock) callback) {
RNFirebaseDatabaseReference *ref = _dbReferences[refId];
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if (ref != nil) {
for (NSDictionary *listener in listeners) {
NSNumber *listenerId = [listener valueForKey:@"listenerId"];
NSString *eventName = [listener valueForKey:@"eventName"];
[ref removeEventHandler:listenerId eventName:eventName];
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if (![ref hasListeners]) {
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[_dbReferences removeObjectForKey:refId];
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}
}
}
callback(@[[NSNull null], @{@"status": @"success", @"refId": refId,}]);
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}
- (RNFirebaseDatabaseReference *)getDBHandle:(NSNumber *)refId path:(NSString *)path modifiers:(NSArray *)modifiers {
RNFirebaseDatabaseReference *ref = _dbReferences[refId];
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if (ref == nil) {
ref = [[RNFirebaseDatabaseReference alloc] initWithPathAndModifiers:self database:[FIRDatabase database] refId:refId path:path modifiers:modifiers];
_dbReferences[refId] = ref;
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}
return ref;
} */
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- (NSArray<NSString *> *)supportedEvents {
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return @[DATABASE_SYNC_EVENT, DATABASE_TRANSACTION_EVENT];
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}
@end
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#else
@implementation RNFirebaseDatabase
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@end
#endif