forked from shadowfacts/Tusker
Add own-instance API request retrying
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@ -46,6 +46,9 @@ class MastodonController: ObservableObject {
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@Published private(set) var instance: Instance!
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@Published private(set) var instance: Instance!
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private(set) var customEmojis: [Emoji]?
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private(set) var customEmojis: [Emoji]?
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private var pendingOwnInstanceRequestCallbacks = [(Instance) -> Void]()
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private var ownInstanceRequest: URLSessionTask?
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var loggedIn: Bool {
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var loggedIn: Bool {
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accountInfo != nil
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accountInfo != nil
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}
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}
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@ -115,17 +118,56 @@ class MastodonController: ObservableObject {
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}
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}
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}
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}
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// todo: this should dedup requests
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func getOwnInstance(completion: ((Instance) -> Void)? = nil) {
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func getOwnInstance(completion: ((Instance) -> Void)? = nil) {
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getOwnInstanceInternal(retryAttempt: 0, completion: completion)
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}
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private func getOwnInstanceInternal(retryAttempt: Int, completion: ((Instance) -> Void)?) {
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// this is main thread only to prevent concurrent access to ownInstanceRequest and pendingOwnInstanceRequestCallbacks
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assert(Thread.isMainThread)
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if let instance = self.instance {
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if let instance = self.instance {
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completion?(instance)
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completion?(instance)
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} else {
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} else {
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if let completion = completion {
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pendingOwnInstanceRequestCallbacks.append(completion)
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}
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if ownInstanceRequest == nil {
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let request = Client.getInstance()
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let request = Client.getInstance()
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run(request) { (response) in
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ownInstanceRequest = run(request) { (response) in
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guard case let .success(instance, _) = response else { fatalError() }
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switch response {
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case .failure(_):
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let delay: DispatchTimeInterval
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switch retryAttempt {
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case 0:
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delay = .seconds(1)
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case 1:
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delay = .seconds(5)
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case 2:
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delay = .seconds(30)
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case 3:
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delay = .seconds(60)
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default:
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// if we've failed four times, just give up :/
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return
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}
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DispatchQueue.main.asyncAfter(deadline: .now() + delay) {
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// completion is nil because in this invocation of getOwnInstanceInternal we've already added it to the pending callbacks array
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self.getOwnInstanceInternal(retryAttempt: retryAttempt + 1, completion: nil)
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}
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case let .success(instance, _):
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DispatchQueue.main.async {
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DispatchQueue.main.async {
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self.ownInstanceRequest = nil
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self.instance = instance
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self.instance = instance
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completion?(instance)
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for completion in self.pendingOwnInstanceRequestCallbacks {
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completion(instance)
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}
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self.pendingOwnInstanceRequestCallbacks = []
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}
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}
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}
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}
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}
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}
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}
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}
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