2021-07-05 15:28:14 +00:00
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//
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// Copyright 2021 New Vector Ltd
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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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2021-09-13 10:36:33 +00:00
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/// Used for storing and resolving dependencies at runtime.
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2021-08-14 23:36:15 +00:00
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struct DependencyContainer {
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2021-08-17 09:19:41 +00:00
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// Stores the dependencies with type information removed.
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private var dependencyStore: [String: Any] = [:]
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2021-09-13 10:36:33 +00:00
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/// Resolve a dependency by type.
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///
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/// Given a particular `Type` (Inferred from return type),
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/// generate a key and retrieve from storage.
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///
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/// - Returns: The resolved dependency.
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2021-08-14 23:36:15 +00:00
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func resolve<T>() -> T {
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let key = String(describing: T.self)
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2021-08-17 09:19:41 +00:00
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guard let t = dependencyStore[key] as? T else {
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fatalError("No provider registered for type \(T.self)")
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2021-08-05 23:27:13 +00:00
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}
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2021-08-14 23:36:15 +00:00
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return t
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}
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2021-09-13 10:36:33 +00:00
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/// Register a dependency.
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///
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/// Given a dependency, generate a key from it's `Type` and save in storage.
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/// - Parameter dependency: The dependency to register.
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2021-08-14 23:36:15 +00:00
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mutating func register<T>(dependency: T) {
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let key = String(describing: T.self)
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2021-08-17 09:19:41 +00:00
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dependencyStore[key] = dependency
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2021-08-05 23:27:13 +00:00
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}
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2021-07-05 15:28:14 +00:00
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}
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