forked from zelo72/mastodon-ios
104 lines
4.0 KiB
Swift
104 lines
4.0 KiB
Swift
//
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// InstanceService.swift
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// Mastodon
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//
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// Created by Cirno MainasuK on 2021-10-9.
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//
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import os.log
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import Foundation
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import Combine
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import CoreData
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import CoreDataStack
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import MastodonSDK
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final class InstanceService {
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var disposeBag = Set<AnyCancellable>()
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let logger = Logger(subsystem: "InstanceService", category: "Logic")
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// input
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let backgroundManagedObjectContext: NSManagedObjectContext
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weak var apiService: APIService?
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weak var authenticationService: AuthenticationService?
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// output
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init(
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apiService: APIService,
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authenticationService: AuthenticationService
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) {
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self.backgroundManagedObjectContext = apiService.backgroundManagedObjectContext
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self.apiService = apiService
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self.authenticationService = authenticationService
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authenticationService.activeMastodonAuthenticationBox
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.receive(on: DispatchQueue.main)
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.compactMap { $0?.domain }
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.removeDuplicates() // prevent infinity loop
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.sink { [weak self] domain in
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guard let self = self else { return }
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self.updateInstance(domain: domain)
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}
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.store(in: &disposeBag)
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}
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}
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extension InstanceService {
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func updateInstance(domain: String) {
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guard let apiService = self.apiService else { return }
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apiService.instance(domain: domain)
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.flatMap { response -> AnyPublisher<Mastodon.Response.Content<Mastodon.Entity.Instance>, Error> in
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let managedObjectContext = self.backgroundManagedObjectContext
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return managedObjectContext.performChanges {
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// get instance
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let (instance, _) = APIService.CoreData.createOrMergeInstance(
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into: managedObjectContext,
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domain: domain,
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entity: response.value,
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networkDate: response.networkDate,
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log: OSLog.api
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)
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// update relationship
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let request = MastodonAuthentication.sortedFetchRequest
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request.predicate = MastodonAuthentication.predicate(domain: domain)
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request.returnsObjectsAsFaults = false
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do {
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let authentications = try managedObjectContext.fetch(request)
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for authentication in authentications {
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authentication.update(instance: instance)
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}
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} catch {
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assertionFailure(error.localizedDescription)
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}
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}
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.setFailureType(to: Error.self)
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.tryMap { result -> Mastodon.Response.Content<Mastodon.Entity.Instance> in
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switch result {
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case .success:
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return response
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case .failure(let error):
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throw error
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}
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}
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.eraseToAnyPublisher()
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}
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.sink { [weak self] completion in
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guard let self = self else { return }
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switch completion {
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case .failure(let error):
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self.logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): [Instance] update instance failure: \(error.localizedDescription)")
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case .finished:
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self.logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): [Instance] update instance for domain: \(domain)")
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}
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} receiveValue: { [weak self] response in
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guard let self = self else { return }
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// do nothing
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}
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.store(in: &disposeBag)
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}
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}
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