mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-09 22:36:01 +05:45
110 lines
4.0 KiB
Swift
110 lines
4.0 KiB
Swift
// Copyright 2022 Google LLC
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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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import FirebaseAppCheckInterop
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import FirebaseAuthInterop
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import FirebaseCore
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import FirebaseMessagingInterop
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import Foundation
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// Avoids exposing internal FirebaseCore APIs to Swift users.
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@_implementationOnly import FirebaseCoreExtension
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@objc(FIRFunctionsProvider)
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protocol FunctionsProvider {
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@objc func functions(for app: FirebaseApp,
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region: String?,
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customDomain: String?,
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type: AnyClass) -> Functions
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// TODO: See if we can avoid the `type` parameter by either making it a `Functions` argument to
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// allow subclasses, or avoid it entirely and fix tests. This was done for FunctionsCombineUnit,
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// although we may be able to now port to using `@testable` instead of using the mock.
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}
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@objc(FIRFunctionsComponent) class FunctionsComponent: NSObject, Library, FunctionsProvider {
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// MARK: - Private Variables
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/// The app associated with all functions instances in this container.
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/// This is `unowned` instead of `weak` so it can be used without unwrapping in `functions()`
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private unowned let app: FirebaseApp
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/// A map of active instances, grouped by app. Keys are FirebaseApp names and values are arrays
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/// containing all instances of Functions associated with the given app.
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private var instances: [String: [Functions]] = [:]
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/// Lock to manage access to the instances array to avoid race conditions.
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private var instancesLock: os_unfair_lock = .init()
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// MARK: - Initializers
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required init(app: FirebaseApp) {
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self.app = app
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}
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// MARK: - Library conformance
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static func componentsToRegister() -> [Component] {
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let appCheckInterop = Dependency(with: AppCheckInterop.self, isRequired: false)
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let authInterop = Dependency(with: AuthInterop.self, isRequired: false)
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let messagingInterop = Dependency(with: MessagingInterop.self, isRequired: false)
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return [Component(FunctionsProvider.self,
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instantiationTiming: .lazy,
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dependencies: [
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appCheckInterop,
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authInterop,
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messagingInterop,
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]) { container, isCacheable in
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guard let app = container.app else { return nil }
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isCacheable.pointee = true
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return self.init(app: app)
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}]
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}
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// MARK: - FunctionsProvider conformance
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func functions(for app: FirebaseApp,
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region: String?,
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customDomain: String?,
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type: AnyClass) -> Functions {
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os_unfair_lock_lock(&instancesLock)
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// Unlock before the function returns.
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defer { os_unfair_lock_unlock(&instancesLock) }
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if let associatedInstances = instances[app.name] {
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for instance in associatedInstances {
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// Domains may be nil, so handle with care.
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var equalDomains = false
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if let instanceCustomDomain = instance.customDomain {
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equalDomains = instanceCustomDomain == customDomain
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} else {
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equalDomains = customDomain == nil
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}
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// Check if it's a match.
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if instance.region == region, equalDomains {
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return instance
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}
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}
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}
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let newInstance = Functions(app: app,
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region: region ?? FunctionsConstants.defaultRegion,
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customDomain: customDomain)
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let existingInstances = instances[app.name, default: []]
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instances[app.name] = existingInstances + [newInstance]
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return newInstance
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}
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}
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