117 lines
5.3 KiB
Swift
117 lines
5.3 KiB
Swift
//
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// SearchViewModel.swift
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// Mastodon
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//
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// Created by sxiaojian on 2021/3/31.
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//
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import Combine
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import Foundation
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import MastodonSDK
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import OSLog
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import UIKit
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final class SearchViewModel {
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var disposeBag = Set<AnyCancellable>()
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// input
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let context: AppContext
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// output
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let searchText = CurrentValueSubject<String, Never>("")
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let searchScope = CurrentValueSubject<String, Never>("")
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let isSearching = CurrentValueSubject<Bool, Never>(false)
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let searchResult = CurrentValueSubject<Mastodon.Entity.SearchResult?, Never>(nil)
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var recommendHashTags = [Mastodon.Entity.Tag]()
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var recommendAccounts = [Mastodon.Entity.Account]()
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init(context: AppContext) {
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self.context = context
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guard let activeMastodonAuthenticationBox = self.context.authenticationService.activeMastodonAuthenticationBox.value else {
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return
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}
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Publishers.CombineLatest(
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searchText
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.filter { !$0.isEmpty }
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.debounce(for: .milliseconds(300), scheduler: DispatchQueue.main).removeDuplicates(),
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searchScope)
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.flatMap { (text, scope) -> AnyPublisher<Mastodon.Response.Content<Mastodon.Entity.SearchResult>, Error> in
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let query = Mastodon.API.Search.Query(accountID: nil,
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maxID: nil,
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minID: nil,
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type: scope,
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excludeUnreviewed: nil,
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q: text,
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resolve: nil,
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limit: nil,
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offset: nil,
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following: nil)
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return context.apiService.search(domain: activeMastodonAuthenticationBox.domain, query: query, mastodonAuthenticationBox: activeMastodonAuthenticationBox)
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}
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.sink { _ in
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} receiveValue: { [weak self] result in
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self?.searchResult.value = result.value
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}
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.store(in: &disposeBag)
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isSearching
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.sink { [weak self] isSearching in
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if !isSearching {
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self?.searchResult.value == nil
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}
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}
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.store(in: &disposeBag)
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}
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func requestRecommendHashTags() -> Future<Void, Error> {
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Future { promise in
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guard let activeMastodonAuthenticationBox = self.context.authenticationService.activeMastodonAuthenticationBox.value else {
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promise(.failure(APIService.APIError.implicit(APIService.APIError.ErrorReason.authenticationMissing)))
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return
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}
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self.context.apiService.recommendTrends(domain: activeMastodonAuthenticationBox.domain, query: nil)
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.sink { completion in
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switch completion {
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case .failure(let error):
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: recommendHashTags request fail: %s", (#file as NSString).lastPathComponent, #line, #function, error.localizedDescription)
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promise(.failure(error))
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case .finished:
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: recommendHashTags request success", (#file as NSString).lastPathComponent, #line, #function)
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promise(.success(()))
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}
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} receiveValue: { [weak self] tags in
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guard let self = self else { return }
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self.recommendHashTags = tags.value
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}
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.store(in: &self.disposeBag)
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}
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}
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func requestRecommendAccounts() -> Future<Void, Error> {
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Future { promise in
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guard let activeMastodonAuthenticationBox = self.context.authenticationService.activeMastodonAuthenticationBox.value else {
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promise(.failure(APIService.APIError.implicit(APIService.APIError.ErrorReason.authenticationMissing)))
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return
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}
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self.context.apiService.recommendAccount(domain: activeMastodonAuthenticationBox.domain, query: nil, mastodonAuthenticationBox: activeMastodonAuthenticationBox)
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.sink { completion in
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switch completion {
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case .failure(let error):
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: recommendHashTags request fail: %s", (#file as NSString).lastPathComponent, #line, #function, error.localizedDescription)
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promise(.failure(error))
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case .finished:
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os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: recommendHashTags request success", (#file as NSString).lastPathComponent, #line, #function)
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promise(.success(()))
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}
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} receiveValue: { [weak self] accounts in
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guard let self = self else { return }
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self.recommendAccounts = accounts.value
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}
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.store(in: &self.disposeBag)
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}
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}
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}
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