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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 "FIRMutableData.h"
#import "FIRMutableData_Private.h"
#import "FSnapshotHolder.h"
#import "FSnapshotUtilities.h"
#import "FChildrenNode.h"
#import "FTransformedEnumerator.h"
#import "FNamedNode.h"
#import "FIndexedNode.h"
@interface FIRMutableData ()
- (id) initWithPrefixPath:(FPath *)path andSnapshotHolder:(FSnapshotHolder *)snapshotHolder;
@property (strong, nonatomic) FSnapshotHolder* data;
@property (strong, nonatomic) FPath* prefixPath;
@end
@implementation FIRMutableData
@synthesize data;
@synthesize prefixPath;
- (id) initWithNode:(id<FNode>)node {
FSnapshotHolder* holder = [[FSnapshotHolder alloc] init];
FPath* path = [FPath empty];
[holder updateSnapshot:path withNewSnapshot:node];
return [self initWithPrefixPath:path andSnapshotHolder:holder];
}
- (id) initWithPrefixPath:(FPath *)path andSnapshotHolder:(FSnapshotHolder *)snapshotHolder {
self = [super init];
if (self) {
self.prefixPath = path;
self.data = snapshotHolder;
}
return self;
}
- (FIRMutableData *)childDataByAppendingPath:(NSString *)path {
FPath* wholePath = [self.prefixPath childFromString:path];
return [[FIRMutableData alloc] initWithPrefixPath:wholePath andSnapshotHolder:self.data];
}
- (FIRMutableData *) parent {
if ([self.prefixPath isEmpty]) {
return nil;
} else {
FPath* path = [self.prefixPath parent];
return [[FIRMutableData alloc] initWithPrefixPath:path andSnapshotHolder:self.data];
}
}
- (void) setValue:(id)aValue {
id<FNode> node = [FSnapshotUtilities nodeFrom:aValue withValidationFrom:@"setValue:"];
[self.data updateSnapshot:self.prefixPath withNewSnapshot:node];
}
- (void) setPriority:(id)aPriority {
id<FNode> node = [self.data getNode:self.prefixPath];
id<FNode> pri = [FSnapshotUtilities nodeFrom:aPriority];
node = [node updatePriority:pri];
[self.data updateSnapshot:self.prefixPath withNewSnapshot:node];
}
- (id) value {
return [[self.data getNode:self.prefixPath] val];
}
- (id) priority {
return [[[self.data getNode:self.prefixPath] getPriority] val];
}
- (BOOL) hasChildren {
id<FNode> node = [self.data getNode:self.prefixPath];
return ![node isLeafNode] && ![(FChildrenNode*)node isEmpty];
}
- (BOOL) hasChildAtPath:(NSString *)path {
id<FNode> node = [self.data getNode:self.prefixPath];
FPath* childPath = [[FPath alloc] initWith:path];
return ![[node getChild:childPath] isEmpty];
}
- (NSUInteger) childrenCount {
return [[self.data getNode:self.prefixPath] numChildren];
}
- (NSString *) key {
return [self.prefixPath getBack];
}
- (id<FNode>) nodeValue {
return [self.data getNode:self.prefixPath];
}
- (NSEnumerator<FIRMutableData *> *) children {
FIndexedNode *indexedNode = [FIndexedNode indexedNodeWithNode:self.nodeValue];
return [[FTransformedEnumerator alloc] initWithEnumerator:[indexedNode childEnumerator] andTransform:^id(FNamedNode *node) {
FPath* childPath = [self.prefixPath childFromString:node.name];
FIRMutableData * childData = [[FIRMutableData alloc] initWithPrefixPath:childPath andSnapshotHolder:self.data];
return childData;
}];
}
- (BOOL) isEqualToData:(FIRMutableData *)other {
return self.data == other.data && [[self.prefixPath description] isEqualToString:[other.prefixPath description]];
}
- (NSString *) description {
if (self.key == nil) {
return [NSString stringWithFormat:@"FIRMutableData (top-most transaction) %@ %@", self.key, self.value];
} else {
return [NSString stringWithFormat:@"FIRMutableData (%@) %@", self.key, self.value];
}
}
@end
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