mastodon-ios/Mastodon/Scene/Discovery/News/DiscoveryNewsViewModel.swift

75 lines
2.0 KiB
Swift

//
// DiscoveryNewsViewModel.swift
// Mastodon
//
// Created by MainasuK on 2022-4-13.
//
import os.log
import UIKit
import Combine
import GameplayKit
import CoreData
import CoreDataStack
import MastodonSDK
final class DiscoveryNewsViewModel {
var disposeBag = Set<AnyCancellable>()
// input
let context: AppContext
let listBatchFetchViewModel = ListBatchFetchViewModel()
// output
@Published var links: [Mastodon.Entity.Link] = []
var diffableDataSource: UITableViewDiffableDataSource<DiscoverySection, DiscoveryItem>?
private(set) lazy var stateMachine: GKStateMachine = {
let stateMachine = GKStateMachine(states: [
State.Initial(viewModel: self),
State.Reloading(viewModel: self),
State.Fail(viewModel: self),
State.Idle(viewModel: self),
State.Loading(viewModel: self),
State.NoMore(viewModel: self),
])
stateMachine.enter(State.Initial.self)
return stateMachine
}()
let didLoadLatest = PassthroughSubject<Void, Never>()
@Published var isServerSupportEndpoint = true
init(context: AppContext) {
self.context = context
// end init
Task {
await checkServerEndpoint()
} // end Task
}
deinit {
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
}
}
extension DiscoveryNewsViewModel {
func checkServerEndpoint() async {
guard let authenticationBox = context.authenticationService.activeMastodonAuthenticationBox.value else { return }
do {
_ = try await context.apiService.trendLinks(
domain: authenticationBox.domain,
query: .init(offset: nil, limit: nil)
)
} catch let error as Mastodon.API.Error where error.httpResponseStatus.code == 404 {
isServerSupportEndpoint = false
} catch {
// do nothing
}
}
}