mastodon-ios/Mastodon/Scene/Profile/Header/ProfileHeaderViewModel.swift

116 lines
3.5 KiB
Swift

//
// ProfileHeaderViewModel.swift
// Mastodon
//
// Created by MainasuK Cirno on 2021-4-9.
//
import os.log
import UIKit
import Combine
import Kanna
import MastodonSDK
import MastodonMeta
final class ProfileHeaderViewModel {
static let avatarImageMaxSizeInPixel = CGSize(width: 400, height: 400)
static let maxProfileFieldCount = 4
var disposeBag = Set<AnyCancellable>()
// input
let context: AppContext
@Published var isEditing = false
@Published var accountForEdit: Mastodon.Entity.Account?
@Published var emojiMeta: MastodonContent.Emojis = [:]
let viewDidAppear = CurrentValueSubject<Bool, Never>(false)
let needsSetupBottomShadow = CurrentValueSubject<Bool, Never>(true)
let needsFiledCollectionViewHidden = CurrentValueSubject<Bool, Never>(false)
let isTitleViewContentOffsetSet = CurrentValueSubject<Bool, Never>(false)
// output
let isTitleViewDisplaying = CurrentValueSubject<Bool, Never>(false)
let displayProfileInfo = ProfileInfo()
let editProfileInfo = ProfileInfo()
let editProfileInfoDidInitialized = CurrentValueSubject<Void, Never>(Void()) // needs trigger initial event
init(context: AppContext) {
self.context = context
Publishers.CombineLatest(
$isEditing.removeDuplicates(), // only trigger when value toggle
$accountForEdit
)
.receive(on: DispatchQueue.main)
.sink { [weak self] isEditing, account in
guard let self = self else { return }
guard isEditing else { return }
// setup editing value when toggle to editing
self.editProfileInfo.name = self.displayProfileInfo.name // set to name
self.editProfileInfo.avatarImage = nil // set to empty
self.editProfileInfo.note = ProfileHeaderViewModel.normalize(note: self.displayProfileInfo.note)
self.editProfileInfoDidInitialized.send()
}
.store(in: &disposeBag)
}
}
extension ProfileHeaderViewModel {
class ProfileInfo {
// input
@Published var name: String?
@Published var avatarImageURL: URL?
@Published var avatarImage: UIImage?
@Published var note: String?
// output
@Published var avatarImageResource = ImageResource(url: nil, image: nil)
struct ImageResource {
let url: URL?
let image: UIImage?
}
init() {
Publishers.CombineLatest(
$avatarImageURL,
$avatarImage
)
.map { url, image in
ImageResource(url: url, image: image)
}
.assign(to: &$avatarImageResource)
}
}
}
extension ProfileHeaderViewModel {
static func normalize(note: String?) -> String? {
guard let note = note?.trimmingCharacters(in: .whitespacesAndNewlines),!note.isEmpty else {
return nil
}
let html = try? HTML(html: note, encoding: .utf8)
return html?.text
}
}
// MARK: - ProfileViewModelEditable
extension ProfileHeaderViewModel: ProfileViewModelEditable {
func isEdited() -> Bool {
guard isEditing else { return false }
guard editProfileInfo.name == displayProfileInfo.name else { return true }
guard editProfileInfo.avatarImage == nil else { return true }
guard editProfileInfo.note == ProfileHeaderViewModel.normalize(note: displayProfileInfo.note) else { return true }
return false
}
}