97 lines
3.3 KiB
Swift
97 lines
3.3 KiB
Swift
//
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// EmojiService+CustomEmojiViewModel.swift
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// Mastodon
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//
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// Created by MainasuK Cirno on 2021-3-15.
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//
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import Foundation
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import Combine
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import GameplayKit
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import MastodonSDK
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import MastodonCommon
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extension EmojiService {
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public final class CustomEmojiViewModel {
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var disposeBag = Set<AnyCancellable>()
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// input
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public let domain: String
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public weak var service: EmojiService?
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// output
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private(set) lazy var stateMachine: GKStateMachine = {
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// exclude timeline middle fetcher state
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let stateMachine = GKStateMachine(states: [
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LoadState.Initial(viewModel: self),
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LoadState.Loading(viewModel: self),
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LoadState.Fail(viewModel: self),
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LoadState.Finish(viewModel: self),
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])
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stateMachine.enter(LoadState.Initial.self)
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return stateMachine
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}()
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public let emojis = CurrentValueSubject<[Mastodon.Entity.Emoji]?, Never>(nil)
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public let emojiDict = CurrentValueSubject<[String: [Mastodon.Entity.Emoji]]?, Never>(nil)
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public let emojiMapping = CurrentValueSubject<[String: String], Never>([:])
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public let emojiTrie = CurrentValueSubject<Trie<Character>?, Never>(nil)
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private var learnedEmoji: Set<String> = Set()
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init(domain: String, service: EmojiService) {
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self.domain = domain
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self.service = service
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emojis
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.compactMap { value in
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guard let value else { return nil }
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return Dictionary(grouping: value, by: { value in value.shortcode })
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}
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.assign(to: \.value, on: emojiDict)
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.store(in: &disposeBag)
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emojiDict
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.compactMap { dict in
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guard let dict else { return nil }
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var mapping: [String: String] = [:]
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for (key, values) in dict {
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guard let emoji = values.first else { continue }
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mapping[key] = emoji.url
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}
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return mapping
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}
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.assign(to: \.value, on: emojiMapping)
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.store(in: &disposeBag)
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emojis
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.compactMap { emojis -> Trie<Character>? in
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guard let emojis, emojis.isEmpty == false else { return nil }
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var trie: Trie<Character> = Trie()
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for emoji in emojis {
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let key = emoji.shortcode.lowercased()
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trie.inserted(Array(key).slice, value: emoji)
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}
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return trie
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}
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.assign(to: \.value, on: emojiTrie)
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.store(in: &disposeBag)
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}
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func emoji(shortcode: String) -> Mastodon.Entity.Emoji? {
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if !learnedEmoji.contains(shortcode) {
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learnedEmoji.insert(shortcode)
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DispatchQueue.global().async {
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UITextChecker.learnWord(shortcode)
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UITextChecker.learnWord(":" + shortcode + ":")
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}
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}
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return emojiDict.value?[shortcode]?.first
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}
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}
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}
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