66 lines
2.7 KiB
Swift
66 lines
2.7 KiB
Swift
//
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// Copyright (c) 2023 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import Dispatch
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public struct SingleValueStorageAsyncWrapper<Storage: SingleValueStorage>: AsyncSingleValueStorage {
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private let wrappedStorage: Storage
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private let accessQueue: DispatchQueue
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public init(wrappedStorage: Storage, accessQueue: DispatchQueue) {
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self.wrappedStorage = wrappedStorage
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self.accessQueue = accessQueue
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}
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public func hasStoredValue(completion: @escaping (Bool) -> Void) -> Cancellable {
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withWorkItem(execute: wrappedStorage.hasStoredValue, completion: completion)
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}
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public func store(value: Storage.ValueType, completion: @escaping (Result<Void, Storage.ErrorType>) -> Void) -> Cancellable {
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withWorkItem(execute: { wrappedStorage.store(value: value) }, completion: completion)
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}
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public func getValue(completion: @escaping (Result<Storage.ValueType, Storage.ErrorType>) -> Void) -> Cancellable {
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withWorkItem(execute: wrappedStorage.getValue, completion: completion)
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}
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public func deleteValue(completion: @escaping (Result<Void, Storage.ErrorType>) -> Void) -> Cancellable {
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withWorkItem(execute: wrappedStorage.deleteValue, completion: completion)
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}
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private func withWorkItem<T>(execute closure: @escaping () -> T, completion: @escaping (T) -> Void) -> Cancellable {
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let workItem = DispatchWorkItem {
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completion(closure())
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}
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accessQueue.async(execute: workItem)
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return workItem
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}
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}
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public extension SingleValueStorage {
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func async(on queue: DispatchQueue) -> SingleValueStorageAsyncWrapper<Self> {
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SingleValueStorageAsyncWrapper(wrappedStorage: self, accessQueue: queue)
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}
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}
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