70 lines
1.9 KiB
Swift
70 lines
1.9 KiB
Swift
/*
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* Copyright 2022 The Yorkie Authors. All rights reserved.
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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 Foundation
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/**
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* `Change` represents a unit of modification in the document.
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*/
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struct Change {
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/// The ID of this change.
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private(set) var id: ChangeID
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// `operations` represent a series of user edits.
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private(set) var operations: [Operation]
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// `message` is used to save a description of the change.
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let message: String?
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init(id: ChangeID, operations: [Operation], message: String? = nil) {
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self.id = id
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self.operations = operations
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self.message = message
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}
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/**
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* `setActor` sets the given actor.
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*/
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mutating func setActor(_ actorID: ActorID) {
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let operations = self.operations.map {
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var new = $0
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new.setActor(actorID)
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return new
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}
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self.operations = operations
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self.id.setActor(actorID)
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}
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/**
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* `execute` executes the operations of this change to the given root.
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*/
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func execute(root: CRDTRoot) throws {
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try self.operations.forEach {
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try $0.execute(root: root)
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}
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}
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/**
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* `structureAsString` returns a String containing the meta data of this change.
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*/
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var structureAsString: String {
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return self.operations
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.map { $0.structureAsString }
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.joined(separator: ",")
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}
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}
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