588 lines
23 KiB
Objective-C
588 lines
23 KiB
Objective-C
#import "RNFirebase.h"
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#import "RNFirebaseDatabase.h"
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#import "RNFirebaseEvents.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
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database:(FIRDatabase *) database
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refId:(NSNumber *) refId
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path:(NSString *) path
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modifiers:(NSArray *) modifiers
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{
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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
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eventName:(NSString *) eventName
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{
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if (![_listeners objectForKey:listenerId]) {
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id withBlock = ^(FIRDataSnapshot * _Nonnull snapshot) {
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NSDictionary *props = [RNFirebaseDBReference snapshotToDict:snapshot];
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[self sendJSEvent:DATABASE_DATA_EVENT
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title:eventName
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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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}];
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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
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listenerId:listenerId];
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};
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int eventType = [self eventTypeFromName:eventName];
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FIRDatabaseHandle handle = [_query observeEventType:eventType
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withBlock:withBlock
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withCancelBlock:errorBlock];
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[_listeners setObject:@(handle) forKey:listenerId];
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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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{
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[_query observeSingleEventOfType:FIRDataEventTypeValue
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withBlock:^(FIRDataSnapshot * _Nonnull snapshot) {
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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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}]);
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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(@[@{
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@"eventName": DATABASE_ERROR_EVENT,
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@"path": _path,
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@"refId": _refId,
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@"code": @([error code]),
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@"details": [error debugDescription],
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@"message": [error localizedDescription],
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@"description": [error description]
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}]);
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}];
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}
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- (void) removeEventHandler:(NSNumber *) listenerId
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eventName:(NSString *) eventName
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{
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FIRDatabaseHandle handle = [[_listeners objectForKey: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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{
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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 setObject:val forKey:@"value"];
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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 setObject:childKeys forKey:@"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
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listenerId:(NSNumber *) listenerId
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{
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NSDictionary *event = @{
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@"eventName": DATABASE_ERROR_EVENT,
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@"path": _path,
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@"refId": _refId,
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@"listenerId": listenerId,
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@"code": @([error code]),
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@"details": [error debugDescription],
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@"message": [error localizedDescription],
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@"description": [error description]
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};
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@try {
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[_emitter sendEventWithName:DATABASE_ERROR_EVENT body:event];
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}
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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
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path:(NSString*) path
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modifiers:(NSArray *) modifiers
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{
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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
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type:(NSString *) type
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{
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if ([type isEqualToString:@"number"]) {
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return [NSNumber numberWithInteger:value.integerValue];
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} else if ([type isEqualToString:@"boolean"]) {
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return [NSNumber numberWithBool: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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{
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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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{
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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(RNFirebaseDatabase);
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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:(NSString *) path identifier:(NSString *) identifier applyLocally:(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 setObject:sema forKey:@"semaphore"];
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref runTransactionBlock:^FIRTransactionResult * _Nonnull(FIRMutableData * _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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} andCompletionBlock:^(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:@{
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@"id": identifier,
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@"type": @"error",
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@"code": [NSNumber numberWithInt:[databaseError code]],
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@"message": [databaseError description]
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}];
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} else {
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[self sendTransactionEvent:DATABASE_TRANSACTION_EVENT body:@{
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@"id": identifier,
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@"type": @"complete",
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@"committed": @(committed),
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@"snapshot": [RNFirebaseDBReference snapshotToDict:snapshot],
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}];
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}
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} withLocalEvents:applyLocally];
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});
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}
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RCT_EXPORT_METHOD(tryCommitTransaction:(NSString *) identifier withData:(NSDictionary *) data) {
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__block NSMutableDictionary *transactionState;
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dispatch_sync(_transactionQueue, ^{
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transactionState = [_transactions objectForKey: 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:(BOOL) enable
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callback:(RCTResponseSenderBlock) callback)
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{
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BOOL isEnabled = [FIRDatabase database].persistenceEnabled;
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if ( isEnabled != enable) {
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[FIRDatabase database].persistenceEnabled = enable;
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}
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callback(@[[NSNull null], @{
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@"result": @"success"
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}]);
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}
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RCT_EXPORT_METHOD(keepSynced:(NSString *) path
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withEnable:(BOOL) enable
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callback:(RCTResponseSenderBlock) callback)
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{
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref keepSynced:enable];
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callback(@[[NSNull null], @{
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@"status": @"success",
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@"path": path
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}]);
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}
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RCT_EXPORT_METHOD(set:(NSString *) path
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data:(NSDictionary *)data
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callback:(RCTResponseSenderBlock) callback)
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{
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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:(NSString *) path
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value:(NSDictionary *)value
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callback:(RCTResponseSenderBlock) callback)
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{
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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:(NSString *) path
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callback:(RCTResponseSenderBlock) callback)
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{
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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:(NSString *) path
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data:(NSDictionary *) data
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callback:(RCTResponseSenderBlock) callback)
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{
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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 = @{
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@"code": @([error code]),
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@"details": [error debugDescription],
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@"message": [error localizedDescription],
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@"description": [error description]
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};
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callback(@[evt]);
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} else {
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callback(@[[NSNull null], @{
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@"status": @"success",
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@"ref": newPath
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}]);
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}
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}];
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} else {
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callback(@[[NSNull null], @{
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@"status": @"success",
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@"ref": newPath
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}]);
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}
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}
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RCT_EXPORT_METHOD(on:(nonnull 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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{
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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], @{
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@"status": @"success",
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@"refId": refId,
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@"handle": path
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}]);
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}
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RCT_EXPORT_METHOD(once:(nonnull 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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{
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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:(nonnull NSNumber *) refId
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listeners:(NSArray *) listeners
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callback:(RCTResponseSenderBlock) callback)
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{
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RNFirebaseDBReference *ref = [_dbReferences objectForKey: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], @{
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@"status": @"success",
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@"refId": refId,
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}]);
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}
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// On disconnect
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RCT_EXPORT_METHOD(onDisconnectSet:(NSString *) path
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props:(NSDictionary *) props
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callback:(RCTResponseSenderBlock) callback)
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{
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FIRDatabaseReference *ref = [self getPathRef:path];
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[ref onDisconnectSetValue:props[@"value"]
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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:(NSString *) path
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callback:(RCTResponseSenderBlock) callback)
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{
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FIRDatabaseReference *ref = [self getPathRef:path];
|
|
[ref onDisconnectRemoveValueWithCompletionBlock:^(NSError * _Nullable error, FIRDatabaseReference * _Nonnull ref) {
|
|
[self handleCallback:@"onDisconnectRemove" callback:callback databaseError:error];
|
|
}];
|
|
}
|
|
|
|
|
|
|
|
RCT_EXPORT_METHOD(onDisconnectCancel:(NSString *) path
|
|
callback:(RCTResponseSenderBlock) callback)
|
|
{
|
|
FIRDatabaseReference *ref = [self getPathRef:path];
|
|
[ref cancelDisconnectOperationsWithCompletionBlock:^(NSError * _Nullable error, FIRDatabaseReference * _Nonnull ref) {
|
|
[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": [NSNumber numberWithInt:[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 objectForKey:refId];
|
|
|
|
if (ref == nil) {
|
|
ref = [[RNFirebaseDBReference alloc] initWithPathAndModifiers:self
|
|
database:[FIRDatabase database]
|
|
refId:refId
|
|
path:path
|
|
modifiers:modifiers];
|
|
[_dbReferences setObject:ref forKey:refId];
|
|
}
|
|
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
|