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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 "FIRDataSnapshot.h"
#import "FIRDataSnapshot_Private.h"
#import "FChildrenNode.h"
#import "FValidation.h"
#import "FTransformedEnumerator.h"
#import "FIRDatabaseReference.h"
@interface FIRDataSnapshot ()
@property (nonatomic, strong) FIRDatabaseReference *ref;
@end
@implementation FIRDataSnapshot
- (id)initWithRef:(FIRDatabaseReference *)ref indexedNode:(FIndexedNode *)node
{
self = [super init];
if (self != nil) {
self->_ref = ref;
self->_node = node;
}
return self;
}
- (id) value {
return [self.node.node val];
}
- (id) valueInExportFormat {
return [self.node.node valForExport:YES];
}
- (FIRDataSnapshot *)childSnapshotForPath:(NSString *)childPathString {
[FValidation validateFrom:@"child:" validPathString:childPathString];
FPath* childPath = [[FPath alloc] initWith:childPathString];
FIRDatabaseReference * childRef = [self.ref child:childPathString];
id<FNode> childNode = [self.node.node getChild:childPath];
return [[FIRDataSnapshot alloc] initWithRef:childRef indexedNode:[FIndexedNode indexedNodeWithNode:childNode]];
}
- (BOOL) hasChild:(NSString *)childPathString {
[FValidation validateFrom:@"hasChild:" validPathString:childPathString];
FPath* childPath = [[FPath alloc] initWith:childPathString];
return ! [[self.node.node getChild:childPath] isEmpty];
}
- (id) priority {
id<FNode> priority = [self.node.node getPriority];
return priority.val;
}
- (BOOL) hasChildren {
if([self.node.node isLeafNode]) {
return false;
}
else {
return ![self.node.node isEmpty];
}
}
- (BOOL) exists {
return ![self.node.node isEmpty];
}
- (NSString *) key {
return [self.ref key];
}
- (NSUInteger) childrenCount {
return [self.node.node numChildren];
}
- (NSEnumerator<FIRDataSnapshot *> *) children {
return [[FTransformedEnumerator alloc] initWithEnumerator:self.node.childEnumerator andTransform:^id(FNamedNode *node) {
FIRDatabaseReference *childRef = [self.ref child:node.name];
return [[FIRDataSnapshot alloc] initWithRef:childRef indexedNode:[FIndexedNode indexedNodeWithNode:node.node]];
}];
}
- (NSString *) description {
return [NSString stringWithFormat:@"Snap (%@) %@", self.key, self.node.node];
}
@end
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