529 lines
20 KiB
Objective-C
529 lines
20 KiB
Objective-C
#import "RNFirebaseDatabase.h"
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#import "RNFirebaseEvents.h"
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#import "Firebase.h"
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#if __has_include(<FirebaseDatabase/FIRDatabase.h>)
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@interface RNFirebaseDBReference : NSObject
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@property RCTEventEmitter *emitter;
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@property FIRDatabaseQuery *query;
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@property NSNumber *refId;
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@property NSString *path;
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@property NSMutableDictionary *listeners;
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+ (NSDictionary *)snapshotToDict:(FIRDataSnapshot *)snapshot;
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@end
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@implementation RNFirebaseDBReference
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- (id)initWithPathAndModifiers:(RCTEventEmitter *)emitter database:(FIRDatabase *)database refId:(NSNumber *)refId path:(NSString *)path modifiers:(NSArray *)modifiers {
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self = [super init];
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if (self) {
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_emitter = emitter;
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_refId = refId;
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_path = path;
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_query = [self buildQueryAtPathWithModifiers:database path:path modifiers:modifiers];
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_listeners = [[NSMutableDictionary alloc] init];
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}
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return self;
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}
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- (void)addEventHandler:(NSNumber *)listenerId eventName:(NSString *)eventName {
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if (!_listeners[listenerId]) {
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id andPreviousSiblingKeyWithBlock = ^(FIRDataSnapshot *_Nonnull snapshot, NSString *_Nullable previousChildName) {
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NSDictionary *props = [RNFirebaseDBReference snapshotToDict:snapshot];
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[self sendJSEvent:DATABASE_DATA_EVENT title:eventName props:@{
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@"eventName": eventName,
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@"refId": _refId,
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@"listenerId": listenerId,
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@"path": _path,
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@"snapshot": props,
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@"previousChildName": previousChildName != nil ? previousChildName : [NSNull null]
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}];
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};
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id errorBlock = ^(NSError *_Nonnull error) {
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NSLog(@"Error onDBEvent: %@", [error debugDescription]);
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[self removeEventHandler:listenerId eventName:eventName];
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[self getAndSendDatabaseError:error listenerId:listenerId];
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};
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int eventType = [self eventTypeFromName:eventName];
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FIRDatabaseHandle handle = [_query observeEventType:eventType andPreviousSiblingKeyWithBlock:andPreviousSiblingKeyWithBlock withCancelBlock:errorBlock];
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_listeners[listenerId] = @(handle);
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} else {
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NSLog(@"Warning Trying to add duplicate listener for refId: %@ listenerId: %@", _refId, listenerId);
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}
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}
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- (void)addSingleEventHandler:(RCTResponseSenderBlock)callback {
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[_query observeSingleEventOfType:FIRDataEventTypeValue andPreviousSiblingKeyWithBlock:^(FIRDataSnapshot *_Nonnull snapshot, NSString *_Nullable previousChildName) {
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NSDictionary *props = [RNFirebaseDBReference snapshotToDict:snapshot];
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callback(@[[NSNull null], @{
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@"eventName": @"value",
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@"path": _path,
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@"refId": _refId,
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@"snapshot": props,
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@"previousChildName": previousChildName != nil ? previousChildName : [NSNull null]
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}]);
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} withCancelBlock:^(NSError *_Nonnull error) {
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NSLog(@"Error onDBEventOnce: %@", [error debugDescription]);
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callback(@[@{@"eventName": DATABASE_ERROR_EVENT, @"path": _path, @"refId": _refId, @"code": @([error code]), @"details": [error debugDescription], @"message": [error localizedDescription], @"description": [error description]}]);
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}];
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}
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- (void)removeEventHandler:(NSNumber *)listenerId eventName:(NSString *)eventName {
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FIRDatabaseHandle handle = (FIRDatabaseHandle) [_listeners[listenerId] integerValue];
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if (handle) {
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[_listeners removeObjectForKey:listenerId];
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[_query removeObserverWithHandle:handle];
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}
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}
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+ (NSDictionary *)snapshotToDict:(FIRDataSnapshot *)snapshot {
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NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
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[dict setValue:snapshot.key forKey:@"key"];
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NSDictionary *val = snapshot.value;
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dict[@"value"] = val;
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// Snapshot ordering
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NSMutableArray *childKeys = [NSMutableArray array];
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if (snapshot.childrenCount > 0) {
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// Since JS does not respect object ordering of keys
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// we keep a list of the keys and their ordering
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// in the snapshot event
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NSEnumerator *children = [snapshot children];
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FIRDataSnapshot *child;
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while (child = [children nextObject]) {
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[childKeys addObject:child.key];
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}
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}
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dict[@"childKeys"] = childKeys;
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[dict setValue:@(snapshot.hasChildren) forKey:@"hasChildren"];
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[dict setValue:@(snapshot.exists) forKey:@"exists"];
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[dict setValue:@(snapshot.childrenCount) forKey:@"childrenCount"];
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[dict setValue:snapshot.priority forKey:@"priority"];
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return dict;
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}
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- (NSDictionary *)getAndSendDatabaseError:(NSError *)error listenerId:(NSNumber *)listenerId {
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NSDictionary *event = @{@"eventName": DATABASE_ERROR_EVENT, @"path": _path, @"refId": _refId, @"listenerId": listenerId, @"code": @([error code]), @"details": [error debugDescription], @"message": [error localizedDescription], @"description": [error description]};
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@try {
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[_emitter sendEventWithName:DATABASE_ERROR_EVENT body:event];
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} @catch (NSException *err) {
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NSLog(@"An error occurred in getAndSendDatabaseError: %@", [err debugDescription]);
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NSLog(@"Tried to send: %@ with %@", DATABASE_ERROR_EVENT, event);
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}
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return event;
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}
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- (void)sendJSEvent:(NSString *)type title:(NSString *)title props:(NSDictionary *)props {
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@try {
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[_emitter sendEventWithName:type body:@{@"eventName": title, @"body": props}];
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} @catch (NSException *err) {
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NSLog(@"An error occurred in sendJSEvent: %@", [err debugDescription]);
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NSLog(@"Tried to send: %@ with %@", title, props);
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}
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}
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- (FIRDatabaseQuery *)buildQueryAtPathWithModifiers:(FIRDatabase *)database path:(NSString *)path modifiers:(NSArray *)modifiers {
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FIRDatabaseQuery *query = [[database reference] child:path];
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for (NSDictionary *modifier in modifiers) {
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NSString *type = [modifier valueForKey:@"type"];
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NSString *name = [modifier valueForKey:@"name"];
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if ([type isEqualToString:@"orderBy"]) {
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if ([name isEqualToString:@"orderByKey"]) {
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query = [query queryOrderedByKey];
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} else if ([name isEqualToString:@"orderByPriority"]) {
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query = [query queryOrderedByPriority];
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} else if ([name isEqualToString:@"orderByValue"]) {
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query = [query queryOrderedByValue];
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} else if ([name isEqualToString:@"orderByChild"]) {
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NSString *key = [modifier valueForKey:@"key"];
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query = [query queryOrderedByChild:key];
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}
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} else if ([type isEqualToString:@"limit"]) {
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int limit = [[modifier valueForKey:@"limit"] integerValue];
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if ([name isEqualToString:@"limitToLast"]) {
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query = [query queryLimitedToLast:limit];
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} else if ([name isEqualToString:@"limitToFirst"]) {
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query = [query queryLimitedToFirst:limit];
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}
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} else if ([type isEqualToString:@"filter"]) {
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NSString *valueType = [modifier valueForKey:@"valueType"];
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NSString *key = [modifier valueForKey:@"key"];
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id value = [self getIdValue:[modifier valueForKey:@"value"] type:valueType];
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if ([name isEqualToString:@"equalTo"]) {
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if (key != nil) {
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query = [query queryEqualToValue:value childKey:key];
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} else {
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query = [query queryEqualToValue:value];
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}
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} else if ([name isEqualToString:@"endAt"]) {
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if (key != nil) {
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query = [query queryEndingAtValue:value childKey:key];
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} else {
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query = [query queryEndingAtValue:value];
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}
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} else if ([name isEqualToString:@"startAt"]) {
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if (key != nil) {
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query = [query queryStartingAtValue:value childKey:key];
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} else {
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query = [query queryStartingAtValue:value];
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}
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}
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}
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}
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return query;
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}
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- (id)getIdValue:(NSString *)value type:(NSString *)type {
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if ([type isEqualToString:@"number"]) {
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return @(value.doubleValue);
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} else if ([type isEqualToString:@"boolean"]) {
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return @(value.boolValue);
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} else {
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return value;
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}
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}
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- (BOOL)hasListeners {
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return [[_listeners allKeys] count] > 0;
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}
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- (int)eventTypeFromName:(NSString *)name {
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int eventType = FIRDataEventTypeValue;
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if ([name isEqualToString:DATABASE_VALUE_EVENT]) {
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eventType = FIRDataEventTypeValue;
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} else if ([name isEqualToString:DATABASE_CHILD_ADDED_EVENT]) {
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eventType = FIRDataEventTypeChildAdded;
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} else if ([name isEqualToString:DATABASE_CHILD_MODIFIED_EVENT]) {
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eventType = FIRDataEventTypeChildChanged;
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} else if ([name isEqualToString:DATABASE_CHILD_REMOVED_EVENT]) {
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eventType = FIRDataEventTypeChildRemoved;
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} else if ([name isEqualToString:DATABASE_CHILD_MOVED_EVENT]) {
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eventType = FIRDataEventTypeChildMoved;
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}
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return eventType;
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}
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@end
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@implementation RNFirebaseDatabase
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RCT_EXPORT_MODULE();
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- (id)init {
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self = [super init];
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if (self != nil) {
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_dbReferences = [[NSMutableDictionary alloc] init];
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_transactions = [[NSMutableDictionary alloc] init];
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_transactionQueue = dispatch_queue_create("io.invertase.react-native-firebase", DISPATCH_QUEUE_CONCURRENT);
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}
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return self;
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}
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- (void)sendTransactionEvent:(NSString *)type body:(id)body {
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@try {
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[self sendEventWithName:type body:body];
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} @catch (NSException *err) {
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NSLog(@"An error occurred in sendJSEvent: %@", [err debugDescription]);
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NSLog(@"Tried to send: %@ with %@", type, body);
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}
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}
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RCT_EXPORT_METHOD(startTransaction:
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(NSString *) path
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identifier:
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(NSString *) identifier
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applyLocally:
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(BOOL) applyLocally) {
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dispatch_async(_transactionQueue, ^{
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NSMutableDictionary *transactionState = [NSMutableDictionary new];
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dispatch_semaphore_t sema = dispatch_semaphore_create(0);
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transactionState[@"semaphore"] = sema;
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref runTransactionBlock:^FIRTransactionResult * _Nonnull(FIRMutableData *
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_Nonnull currentData) {
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dispatch_barrier_async(_transactionQueue, ^{
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[_transactions setValue:transactionState forKey:identifier];
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[self sendTransactionEvent:DATABASE_TRANSACTION_EVENT body:@{@"id": identifier, @"type": @"update", @"value": currentData.value}];
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});
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// wait for the js event handler to call tryCommitTransaction
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// this wait occurs on the Firebase Worker Queue
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// so if the tryCommitTransaction fails to signal the semaphore
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// no further blocks will be executed by Firebase until the timeout expires
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dispatch_time_t delayTime = dispatch_time(DISPATCH_TIME_NOW, 30 * NSEC_PER_SEC);
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BOOL timedout = dispatch_semaphore_wait(sema, delayTime) != 0;
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BOOL abort = [transactionState valueForKey:@"abort"] || timedout;
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id value = [transactionState valueForKey:@"value"];
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dispatch_barrier_async(_transactionQueue, ^{
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[_transactions removeObjectForKey:identifier];
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});
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if (abort) {
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return [FIRTransactionResult abort];
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} else {
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currentData.value = value;
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return [FIRTransactionResult successWithValue:currentData];
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}
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}
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andCompletionBlock:
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^(NSError *_Nullable databaseError, BOOL committed, FIRDataSnapshot *_Nullable snapshot) {
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if (databaseError != nil) {
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[self sendTransactionEvent:DATABASE_TRANSACTION_EVENT body:@{@"id": identifier, @"type": @"error", @"code": @([databaseError code]), @"message": [databaseError description]}];
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} else {
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[self sendTransactionEvent:DATABASE_TRANSACTION_EVENT body:@{@"id": identifier, @"type": @"complete", @"committed": @(committed), @"snapshot": [RNFirebaseDBReference snapshotToDict:snapshot],}];
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}
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}
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withLocalEvents:
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applyLocally];
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});
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}
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RCT_EXPORT_METHOD(tryCommitTransaction:
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(NSString *) identifier
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withData:
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(NSDictionary *) data) {
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__block NSMutableDictionary *transactionState;
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dispatch_sync(_transactionQueue, ^{
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transactionState = _transactions[identifier];
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});
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if (!transactionState) {
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NSLog(@"tryCommitTransaction for unknown ID %@", identifier);
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return;
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}
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dispatch_semaphore_t sema = [transactionState valueForKey:@"semaphore"];
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BOOL abort = [[data valueForKey:@"abort"] boolValue];
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if (abort) {
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[transactionState setValue:@true forKey:@"abort"];
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} else {
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id newValue = [data valueForKey:@"value"];
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[transactionState setValue:newValue forKey:@"value"];
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}
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dispatch_semaphore_signal(sema);
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}
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RCT_EXPORT_METHOD(enablePersistence:
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(BOOL) enable
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callback:
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(RCTResponseSenderBlock) callback) {
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BOOL isEnabled = [FIRDatabase database].persistenceEnabled;
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if (isEnabled != enable) {
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@try {
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[FIRDatabase database].persistenceEnabled = enable;
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} @catch (NSException *exception) {
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// do nothing - for RN packager reloads
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}
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}
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callback(@[[NSNull null], @{@"result": @"success"}]);
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}
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RCT_EXPORT_METHOD(keepSynced:
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(NSString *) path
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withEnable:
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(BOOL) enable
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callback:
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(RCTResponseSenderBlock) callback) {
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref keepSynced:enable];
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callback(@[[NSNull null], @{@"status": @"success", @"path": path}]);
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}
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RCT_EXPORT_METHOD(set:
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(NSString *) path
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data:
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(NSDictionary *) data
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callback:
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(RCTResponseSenderBlock) callback) {
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref setValue:[data valueForKey:@"value"] withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
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[self handleCallback:@"set" callback:callback databaseError:error];
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}];
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}
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RCT_EXPORT_METHOD(update:
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(NSString *) path
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value:
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(NSDictionary *) value
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callback:
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(RCTResponseSenderBlock) callback) {
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref updateChildValues:value withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
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[self handleCallback:@"update" callback:callback databaseError:error];
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}];
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}
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RCT_EXPORT_METHOD(remove:
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(NSString *) path
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callback:
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(RCTResponseSenderBlock) callback) {
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref removeValueWithCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
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[self handleCallback:@"remove" callback:callback databaseError:error];
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}];
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}
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RCT_EXPORT_METHOD(push:
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(NSString *) path
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data:
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(NSDictionary *) data
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callback:
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(RCTResponseSenderBlock) callback) {
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FIRDatabaseReference *ref = [self getPathRef:path];
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FIRDatabaseReference *newRef = [ref childByAutoId];
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NSURL *url = [NSURL URLWithString:newRef.URL];
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NSString *newPath = [url path];
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if ([data count] > 0) {
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[newRef setValue:[data valueForKey:@"value"] withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
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if (error != nil) {
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// Error handling
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NSDictionary *evt = @{@"code": @([error code]), @"details": [error debugDescription], @"message": [error localizedDescription], @"description": [error description]};
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callback(@[evt]);
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} else {
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callback(@[[NSNull null], @{@"status": @"success", @"ref": newPath}]);
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}
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}];
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} else {
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callback(@[[NSNull null], @{@"status": @"success", @"ref": newPath}]);
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}
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}
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RCT_EXPORT_METHOD(on:
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(nonnull
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NSNumber *) refId
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path:(NSString *) path
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modifiers:(NSArray *) modifiers
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listenerId:(nonnull NSNumber *) listenerId
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name:(NSString *) eventName
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callback:(RCTResponseSenderBlock) callback) {
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RNFirebaseDBReference *ref = [self getDBHandle:refId path:path modifiers:modifiers];
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[ref addEventHandler:listenerId eventName:eventName];
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callback(@[[NSNull null], @{@"status": @"success", @"refId": refId, @"handle": path}]);
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}
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RCT_EXPORT_METHOD(once:
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(nonnull
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NSNumber *) refId
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path:(NSString *) path
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modifiers:(NSArray *) modifiers
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eventName:(NSString *) eventName
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callback:(RCTResponseSenderBlock) callback) {
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RNFirebaseDBReference *ref = [self getDBHandle:refId path:path modifiers:modifiers];
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[ref addSingleEventHandler:callback];
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}
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RCT_EXPORT_METHOD(off:
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(nonnull
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NSNumber *) refId
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listeners:(NSArray *) listeners
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callback:(RCTResponseSenderBlock) callback) {
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RNFirebaseDBReference *ref = _dbReferences[refId];
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if (ref != nil) {
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for (NSDictionary *listener in listeners) {
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NSNumber *listenerId = [listener valueForKey:@"listenerId"];
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NSString *eventName = [listener valueForKey:@"eventName"];
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[ref removeEventHandler:listenerId eventName:eventName];
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if (![ref hasListeners]) {
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[_dbReferences removeObjectForKey:refId];
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}
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}
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}
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callback(@[[NSNull null], @{@"status": @"success", @"refId": refId,}]);
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}
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// On disconnect
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RCT_EXPORT_METHOD(onDisconnectSet:
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(NSString *) path
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props:
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(NSDictionary *) props
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callback:
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(RCTResponseSenderBlock) callback) {
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref onDisconnectSetValue:props[@"value"] withCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
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[self handleCallback:@"onDisconnectSetObject" callback:callback databaseError:error];
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}];
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}
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RCT_EXPORT_METHOD(onDisconnectRemove:
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(NSString *) path
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callback:
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(RCTResponseSenderBlock) callback) {
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref onDisconnectRemoveValueWithCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
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[self handleCallback:@"onDisconnectRemove" callback:callback databaseError:error];
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}];
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}
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RCT_EXPORT_METHOD(onDisconnectCancel:
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(NSString *) path
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callback:
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(RCTResponseSenderBlock) callback) {
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref cancelDisconnectOperationsWithCompletionBlock:^(NSError *_Nullable error, FIRDatabaseReference *_Nonnull _ref) {
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[self handleCallback:@"onDisconnectCancel" callback:callback databaseError:error];
|
|
}];
|
|
}
|
|
|
|
RCT_EXPORT_METHOD(goOffline) {
|
|
[FIRDatabase database].goOffline;
|
|
}
|
|
|
|
RCT_EXPORT_METHOD(goOnline) {
|
|
[FIRDatabase database].goOnline;
|
|
}
|
|
|
|
- (FIRDatabaseReference *)getPathRef:(NSString *)path {
|
|
return [[[FIRDatabase database] reference] child:path];
|
|
}
|
|
|
|
- (void)handleCallback:(NSString *)methodName callback:(RCTResponseSenderBlock)callback databaseError:(NSError *)databaseError {
|
|
if (databaseError != nil) {
|
|
NSDictionary *evt = @{@"code": @([databaseError code]), @"details": [databaseError debugDescription], @"message": [databaseError localizedDescription], @"description": [databaseError description]};
|
|
callback(@[evt]);
|
|
} else {
|
|
callback(@[[NSNull null], @{@"status": @"success", @"method": methodName}]);
|
|
}
|
|
}
|
|
|
|
- (RNFirebaseDBReference *)getDBHandle:(NSNumber *)refId path:(NSString *)path modifiers:(NSArray *)modifiers {
|
|
RNFirebaseDBReference *ref = _dbReferences[refId];
|
|
|
|
if (ref == nil) {
|
|
ref = [[RNFirebaseDBReference alloc] initWithPathAndModifiers:self database:[FIRDatabase database] refId:refId path:path modifiers:modifiers];
|
|
_dbReferences[refId] = ref;
|
|
}
|
|
return ref;
|
|
}
|
|
|
|
// Not sure how to get away from this... yet
|
|
- (NSArray<NSString *> *)supportedEvents {
|
|
return @[DATABASE_DATA_EVENT, DATABASE_ERROR_EVENT, DATABASE_TRANSACTION_EVENT];
|
|
}
|
|
|
|
@end
|
|
|
|
#else
|
|
@implementation RNFirebaseDatabase
|
|
@end
|
|
#endif
|