Kaomoji.swift

import Foundation

struct Kaomoji: Decodable, Hashable, Identifiable {
    var id: String { string }
    let string: String
    let tags: [String]
}

final class KaomojiStore {
    @Published var allKaomojis: [Kaomoji] = []
    @Published var kaomojisByTag: [String: [Kaomoji]] = [:]
    
    static let shared = KaomojiStore()
    private static let itemPerGroup: Int = 7
    
    init() {
        guard let kaomojiURL = Bundle.main.url(forResource: "kaomoji", withExtension: "json") else {
            return
        }
        
        $allKaomojis
            .map { kaomojis in
                var kaomojiResult: [String: [Kaomoji]] = [:]
                for tag in KaomojiTags.allCases {
                    kaomojiResult[tag.rawValue] = kaomojis.filter { $0.tags.contains(tag.rawValue) }
                }
                return kaomojiResult
            }
            .assign(to: &$kaomojisByTag)
        
        FilePublisher(fileURL: kaomojiURL)
            .subscribe(on: DispatchQueue.global(qos: .background))
            .receive(on: DispatchQueue.main)
            .decode(type: [Kaomoji].self, decoder: JSONDecoder())
            .replaceError(with: [])
            .assign(to: &$allKaomojis)
    }
}

enum KaomojiTags: String, CaseIterable {
    case animals, angry, bear, bird, cat, confused, crazy, cry, cheer,
         dance, dead, dog, embarassed, evil, excited, fun, food,
         happy, hide, hug, hungry, hurt, kiss, laugh, love, exercise,
         monkey, music, pig, rabbit, run, sad, scared, smoke, punch,
         sleep, sorry, smug, stare, surprised, surrender, sing, shrug,
         think, troll, wave, whatever, wink, worried, write
    case seaCreatures = "sea creatures"
    case tableFlip = "table flip"

    static let all = KaomojiTags.allCases.map { $0.rawValue }.sorted()
}