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yattee/Model/PlaylistsModel.swift

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Swift
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import Defaults
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import Foundation
import Siesta
import SwiftUI
final class PlaylistsModel: ObservableObject {
static var shared = PlaylistsModel()
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@Published var isLoading = false
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@Published var playlists = [Playlist]()
@Published var reloadPlaylists = false
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@Published var error: RequestError?
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var accounts = AccountsModel.shared
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init(_ playlists: [Playlist] = [Playlist]()) {
self.playlists = playlists
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}
var all: [Playlist] {
playlists.sorted { $0.title.lowercased() < $1.title.lowercased() }
}
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var editable: [Playlist] {
all.filter(\.editable)
}
var lastUsed: Playlist? {
find(id: Defaults[.lastUsedPlaylistID])
}
func find(id: Playlist.ID?) -> Playlist? {
if id.isNil {
return nil
}
return playlists.first { $0.id == id! }
}
var isEmpty: Bool {
playlists.isEmpty
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}
func load(force: Bool = false, onSuccess: @escaping () -> Void = {}) {
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guard accounts.app.supportsUserPlaylists, let account = accounts.current else {
playlists = []
return
}
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loadCachedPlaylists(account)
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guard accounts.signedIn else { return }
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DispatchQueue.main.async { [weak self] in
guard let self else { return }
let request = force ? self.resource?.load() : self.resource?.loadIfNeeded()
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guard !request.isNil else {
onSuccess()
return
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}
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self.isLoading = true
request?
.onCompletion { [weak self] _ in
self?.isLoading = false
}
.onSuccess { resource in
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self.error = nil
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if let playlists: [Playlist] = resource.typedContent() {
self.playlists = playlists
PlaylistsCacheModel.shared.storePlaylist(account: account, playlists: playlists)
onSuccess()
}
}
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.onFailure { self.error = $0 }
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}
}
private func loadCachedPlaylists(_ account: Account) {
let cache = PlaylistsCacheModel.shared.retrievePlaylists(account: account)
if !cache.isEmpty {
DispatchQueue.main.async(qos: .userInteractive) {
self.playlists = cache
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}
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}
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}
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func addVideo(
playlistID: Playlist.ID,
videoID: Video.ID,
onSuccess: @escaping () -> Void = {},
onFailure: ((RequestError) -> Void)? = nil
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) {
accounts.api.addVideoToPlaylist(
videoID,
playlistID,
onFailure: onFailure ?? { requestError in
NavigationModel.shared.presentAlert(
title: "Error when adding to playlist",
message: "(\(requestError.httpStatusCode ?? -1)) \(requestError.userMessage)"
)
}
) {
self.load(force: true) {
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Defaults[.lastUsedPlaylistID] = playlistID
self.reloadPlaylists.toggle()
onSuccess()
}
}
}
func removeVideo(index: String, playlistID: Playlist.ID, onSuccess: @escaping () -> Void = {}) {
accounts.api.removeVideoFromPlaylist(index, playlistID, onFailure: { _ in }) {
self.load(force: true) {
self.reloadPlaylists.toggle()
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onSuccess()
}
}
}
private var resource: Resource? {
accounts.api.playlists
}
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func onAccountChange() {
error = nil
playlists = []
load()
}
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}