65 lines
2.5 KiB
Swift
65 lines
2.5 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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public struct AnySingleValueStorage<ValueType, ErrorType: Error>: SingleValueStorage {
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public typealias HasValueClosure = () -> Bool
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public typealias GetValueClosure = () -> Result<ValueType, ErrorType>
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public typealias StoreValueClosure = (ValueType) -> Result<Void, ErrorType>
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public typealias DeleteValueClosure = () -> Result<Void, ErrorType>
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private let hasValueClosure: HasValueClosure
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private let deleteValueClosure: DeleteValueClosure
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private let getValueClosure: GetValueClosure
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private let storeValueClosure: StoreValueClosure
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public init<Storage: SingleValueStorage>(storage: Storage)
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where Storage.ValueType == ValueType, Storage.ErrorType == ErrorType {
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self.hasValueClosure = storage.hasStoredValue
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self.deleteValueClosure = storage.deleteValue
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self.getValueClosure = storage.getValue
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self.storeValueClosure = storage.store
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}
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public func hasStoredValue() -> Bool {
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hasValueClosure()
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}
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public func store(value: ValueType) -> Result<Void, ErrorType> {
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storeValueClosure(value)
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}
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public func getValue() -> Result<ValueType, ErrorType> {
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getValueClosure()
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}
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public func deleteValue() -> Result<Void, ErrorType> {
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deleteValueClosure()
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}
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}
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public extension SingleValueStorage {
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func eraseToAnySingleValueStorate() -> AnySingleValueStorage<ValueType, ErrorType> {
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AnySingleValueStorage(storage: self)
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}
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}
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