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/*
* Copyright 2017 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "FIRLogger.h"
#import "FChildEventRegistration.h"
#import "FIRDatabaseQuery_Private.h"
#import "FQueryParams.h"
#import "FQuerySpec.h"
#import "FIRDataSnapshot_Private.h"
#import "FDataEvent.h"
#import "FCancelEvent.h"
@interface FChildEventRegistration ()
@property (nonatomic, strong) FRepo *repo;
@property (nonatomic, copy, readwrite) NSDictionary *callbacks;
@property (nonatomic, copy, readwrite) fbt_void_nserror cancelCallback;
@property (nonatomic, readwrite) FIRDatabaseHandle handle;
@end
@implementation FChildEventRegistration
- (id)initWithRepo:(id)repo handle:(FIRDatabaseHandle)fHandle callbacks:(NSDictionary *)callbackBlocks cancelCallback:(fbt_void_nserror)cancelCallbackBlock {
self = [super init];
if (self) {
self.repo = repo;
self.handle = fHandle;
self.callbacks = callbackBlocks;
self.cancelCallback = cancelCallbackBlock;
}
return self;
}
- (BOOL) responseTo:(FIRDataEventType)eventType {
return self.callbacks != nil && [self.callbacks objectForKey:[NSNumber numberWithInteger:eventType]] != nil;
}
- (FDataEvent *) createEventFrom:(FChange *)change query:(FQuerySpec *)query {
FIRDatabaseReference *ref = [[FIRDatabaseReference alloc] initWithRepo:self.repo path:[query.path childFromString:change.childKey]];
FIRDataSnapshot *snapshot = [[FIRDataSnapshot alloc] initWithRef:ref indexedNode:change.indexedNode];
FDataEvent *eventData = [[FDataEvent alloc] initWithEventType:change.type eventRegistration:self
dataSnapshot:snapshot prevName:change.prevKey];
return eventData;
}
- (void) fireEvent:(id <FEvent>)event queue:(dispatch_queue_t)queue {
if ([event isCancelEvent]) {
FCancelEvent *cancelEvent = event;
FFLog(@"I-RDB061001", @"Raising cancel value event on %@", event.path);
NSAssert(self.cancelCallback != nil, @"Raising a cancel event on a listener with no cancel callback");
dispatch_async(queue, ^{
self.cancelCallback(cancelEvent.error);
});
} else if (self.callbacks != nil) {
FDataEvent *dataEvent = event;
FFLog(@"I-RDB061002", @"Raising event callback (%ld) on %@", (long)dataEvent.eventType, dataEvent.path);
fbt_void_datasnapshot_nsstring callback = [self.callbacks objectForKey:[NSNumber numberWithInteger:dataEvent.eventType]];
if (callback != nil) {
dispatch_async(queue, ^{
callback(dataEvent.snapshot, dataEvent.prevName);
});
}
}
}
- (FCancelEvent *) createCancelEventFromError:(NSError *)error path:(FPath *)path {
if (self.cancelCallback != nil) {
return [[FCancelEvent alloc] initWithEventRegistration:self error:error path:path];
} else {
return nil;
}
}
- (BOOL) matches:(id<FEventRegistration>)other {
return self.handle == NSNotFound || other.handle == NSNotFound || self.handle == other.handle;
}
@end
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