bundesmessenger-ios/Riot/Modules/Common/SwiftUI/DependencyInjector.swift

// 
// Copyright 2021 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

struct DependencyInjector {
    private static var dependencyList: [String:Any] = [:]
    
    static func resolve<T>() -> T {
        guard let t = dependencyList[String(describing: T.self)] as? T else {
            fatalError("No provider registered for type \(T.self)")
        }
        return t
    }
    
    static func register<T>(dependency: T) {
        dependencyList[String(describing: T.self)] = dependency
    }
}

@propertyWrapper struct Inject<T> {
    var wrappedValue: T
    
    init() {
        self.wrappedValue = DependencyInjector.resolve()
    }
}