recent-emoji.swift

import Foundation

extension Character {
    var isEmoji: Bool {
        return unicodeScalars.allSatisfy { $0.properties.isEmoji }
    }
}

func recentlyUsedEmoji() -> [Character]? {
  #if os(iOS)
    let preferences = UserDefaults(suiteName: "com.apple.EmojiPreferences")!
    guard let emojiDefaults = preferences.dictionary(forKey: "EmojiDefaultsKey"),
        let emojiRecentsDefaults = emojiDefaults["EmojiRecentsDefaultsKey"] as? [String: Any],
        let recents = emojiRecentsDefaults["RecentsKey"] as? [String]
    else {
        return nil
    }
  #elseif os(macOS)
    let preferences = UserDefaults(suiteName: "com.apple.EmojiPreferences")!
    guard let defaults = preferences.dictionary(forKey: "EMFDefaultsKey"),
        let recents = defaults["EMFRecentsKey"] as? [String]
    else {
        return nil
    }
  #else
    return nil
  #endif

    return recents.compactMap(Character.init)
                  .filter { $0.isEmoji }
}

recentlyUsedEmoji()
// ["🧐", "😨", "😱", "😤" "😡"]

preferences.dictionary(forKey: "EmojiDefaultsKey") doesn't work on iOS 13.2, but EMFDefaultsKey works great