mirror of
https://github.com/firebase/firebase-ios-sdk
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103 lines
3.5 KiB
Objective-C
103 lines
3.5 KiB
Objective-C
/*
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* Copyright 2017 Google
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "FValueEventRegistration.h"
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#import "FCancelEvent.h"
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#import "FDataEvent.h"
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#import "FIRDataSnapshot_Private.h"
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#import "FIRDatabaseQuery_Private.h"
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#import "FQueryParams.h"
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#import "FQuerySpec.h"
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#import <FirebaseCore/FIRLogger.h>
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@interface FValueEventRegistration ()
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@property(nonatomic, strong) FRepo *repo;
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@property(nonatomic, copy, readwrite) fbt_void_datasnapshot callback;
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@property(nonatomic, copy, readwrite) fbt_void_nserror cancelCallback;
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@property(nonatomic, readwrite) FIRDatabaseHandle handle;
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@end
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@implementation FValueEventRegistration
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- (id)initWithRepo:(FRepo *)repo
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handle:(FIRDatabaseHandle)fHandle
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callback:(fbt_void_datasnapshot)callbackBlock
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cancelCallback:(fbt_void_nserror)cancelCallbackBlock {
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self = [super init];
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if (self) {
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self.repo = repo;
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self.handle = fHandle;
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self.callback = callbackBlock;
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self.cancelCallback = cancelCallbackBlock;
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}
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return self;
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}
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- (BOOL)responseTo:(FIRDataEventType)eventType {
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return eventType == FIRDataEventTypeValue;
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}
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- (FDataEvent *)createEventFrom:(FChange *)change query:(FQuerySpec *)query {
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FIRDatabaseReference *ref =
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[[FIRDatabaseReference alloc] initWithRepo:self.repo path:query.path];
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FIRDataSnapshot *snapshot =
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[[FIRDataSnapshot alloc] initWithRef:ref
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indexedNode:change.indexedNode];
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FDataEvent *eventData =
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[[FDataEvent alloc] initWithEventType:FIRDataEventTypeValue
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eventRegistration:self
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dataSnapshot:snapshot];
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return eventData;
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}
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- (void)fireEvent:(id<FEvent>)event queue:(dispatch_queue_t)queue {
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if ([event isCancelEvent]) {
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FCancelEvent *cancelEvent = event;
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FFLog(@"I-RDB065001", @"Raising cancel value event on %@", event.path);
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NSAssert(
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self.cancelCallback != nil,
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@"Raising a cancel event on a listener with no cancel callback");
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dispatch_async(queue, ^{
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self.cancelCallback(cancelEvent.error);
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});
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} else if (self.callback != nil) {
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FDataEvent *dataEvent = event;
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FFLog(@"I-RDB065002", @"Raising value event on %@",
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dataEvent.snapshot.key);
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dispatch_async(queue, ^{
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self.callback(dataEvent.snapshot);
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});
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}
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}
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- (FCancelEvent *)createCancelEventFromError:(NSError *)error
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path:(FPath *)path {
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if (self.cancelCallback != nil) {
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return [[FCancelEvent alloc] initWithEventRegistration:self
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error:error
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path:path];
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} else {
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return nil;
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}
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}
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- (BOOL)matches:(id<FEventRegistration>)other {
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return self.handle == NSNotFound || other.handle == NSNotFound ||
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self.handle == other.handle;
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}
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@end
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