letro-ios/ElementX/Sources/Other/CancellableTask.swift

//
// Copyright 2023 New Vector Ltd
//
// 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

@propertyWrapper
struct CancellableTask<S: Sendable, F: Error> {
    private var storedValue: Task<S, F>?
    
    init(_ value: Task<S, F>? = nil) {
        storedValue = value
    }
    
    var wrappedValue: Task<S, F>? {
        get {
            storedValue
        } set {
            storedValue?.cancel()
            storedValue = newValue
        }
    }
}