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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 <Foundation/Foundation.h>
@class FImmutableTree;
@protocol FNode;
@class FPath;
/**
* This class holds a collection of writes that can be applied to nodes in unison. It abstracts away the logic with
* dealing with priority writes and multiple nested writes. At any given path, there is only allowed to be one write
* modifying that path. Any write to an existing path or shadowing an existing path will modify that existing write to
* reflect the write added.
*/
@interface FCompoundWrite : NSObject
- (id) initWithWriteTree:(FImmutableTree *)tree;
/**
* Creates a compound write with NSDictionary from path string to object
*/
+ (FCompoundWrite *) compoundWriteWithValueDictionary:(NSDictionary *)dictionary;
/**
* Creates a compound write with NSDictionary from path string to node
*/
+ (FCompoundWrite *) compoundWriteWithNodeDictionary:(NSDictionary *)dictionary;
+ (FCompoundWrite *) emptyWrite;
- (FCompoundWrite *) addWrite:(id<FNode>)node atPath:(FPath *)path;
- (FCompoundWrite *) addWrite:(id<FNode>)node atKey:(NSString *)key;
- (FCompoundWrite *) addCompoundWrite:(FCompoundWrite *)node atPath:(FPath *)path;
- (FCompoundWrite *) removeWriteAtPath:(FPath *)path;
- (id<FNode>)rootWrite;
- (BOOL) hasCompleteWriteAtPath:(FPath *)path;
- (id<FNode>) completeNodeAtPath:(FPath *)path;
- (NSArray *) completeChildren;
- (NSDictionary *)childCompoundWrites;
- (FCompoundWrite *) childCompoundWriteAtPath:(FPath *)path;
- (id<FNode>) applyToNode:(id<FNode>)node;
- (void)enumerateWrites:(void (^)(FPath *path, id<FNode>node, BOOL *stop))block;
- (NSDictionary *)valForExport:(BOOL)exportFormat;
- (BOOL) isEmpty;
@end
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