マッチングアプリにつきまとう状態管理のつらさ/torte_state

Transcript

1. ϚονϯάΞϓϦʹ͖ͭ·ͱ͏ঢ়ଶ؅ཧͷͭΒ͞ ߴڮ ༏հ @corin8823 גࣜձࣾτϧς / Developer 2017.10.18 CA.SWIFT #4
2. ߴڮ ༏հ yusuke takahashi גࣜձࣾτϧς / Developer 2013೥౓৽ଔೖࣾ corin8823 @corin8823 ࣗݾ঺հ
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11. final class TopAction { enum Item { case load case error } private let dispatcher: Dispatcher init(dispatcher: Dispatcher = .shared) { self.dispatcher = dispatcher } func loadItem() { let req = API.ItemRequest() Session.send(req) { result in switch result { case .success(let items): self.dispatcher.dispatch(obj: items, key: Item.load) case .failure(let error): self.dispatcher.dispatch(obj: error, key: Item.error) } } } }
12. final class TopStore { private(set) var items = Variable<[Item]>([]) private(set) var error = PublishSubject<Error>() init(dispatcher: Dispatcher = .shared) { dispatcher.register(observer: self, key: TopAction.Item.load) { [weak self] (items: [Item]) in self?.items.value = items } dispatcher.register(observer: self, key: TopAction.Item.error) { [weak self] (error: Error) in self?.error.on(.next(error)) } } }
13. final class TopViewController: UIViewController { @IBOutlet weak var tableView: UITableView! private let store = TopStore() private let disposeBag = DisposeBag() override func viewDidLoad() { super.viewDidLoad() self.store.error .bind { _ in // error handling } .disposed(by: self.disposeBag) self.store.items .asObservable() .bind { [weak self] _ in self?.tableView.reloadData() } .disposed(by: self.disposeBag) TopAction().loadItem() } }
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15. final class TopDetailAction { enum ItemDetail { case update case error } func update(itemId: Int64) { let req = API.UpdateItemRequest(itemId: id) Session.send(req) { result in switch result { case .success(let item): self.dispatcher.dispatch(obj: item, key: ItemDetail.update) 
 case .failure(let error): self.dispatcher.dispatch(obj: error, key: update.error) } } } }
16. final class TopDetailAction { enum ItemDetail { case update case error } enum Item { case update } func update(itemId: Int64) { let req = API.UpdateItemRequest(itemId: id) Session.send(req) { result in switch result { case .success(let item): self.dispatcher.dispatch(obj: item, key: ItemDetail.update) self.dispatcher.dispatch(obj: item, key: Item.update) 
 case .failure(let error): self.dispatcher.dispatch(obj: error, key: update.error) } } } }
17. final class TopStore { private(set) var items = Variable<[Item]>([]) private(set) var error = PublishSubject<Error>() init(dispatcher: Dispatcher = .shared) { dispatcher.register(observer: self, key: TopAction.Item.load) { [weak self] (items: [Item]) in self?.items.value = items } dispatcher.register(observer: self, key: TopAction.Item.error) { [weak self] (error: Error) in self?.error.on(.next(error)) } dispatcher.register(observer: self, key: TopDetailAction.Item.update) { [weak self] (item: Item) in
 if let i = self?.items.value.findFirstIndex ({ $0.id == item.id }) { self?.items.value[i] = match } } } }
18. final class TopViewController: UIViewController { @IBOutlet weak var tableView: UITableView! private let store = TopStore() private let disposeBag = DisposeBag() override func viewDidLoad() { super.viewDidLoad() self.store.error .bind { _ in // error handling } .disposed(by: self.disposeBag) self.store.items .asObservable() .bind { [weak self] _ in self?.tableView.reloadData() } .disposed(by: self.disposeBag) TopAction().loadItem() } }
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