74 lines
2.9 KiB
Swift
74 lines
2.9 KiB
Swift
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//
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// Copyright (c) 2022 Open Whisper Systems. All rights reserved.
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//
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public struct EmojiWithSkinTones: Hashable {
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let baseEmoji: Emoji
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let skinTones: [Emoji.SkinTone]?
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init(baseEmoji: Emoji, skinTones: [Emoji.SkinTone]? = nil) {
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self.baseEmoji = baseEmoji
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// Deduplicate skin tones, while preserving order. This allows for
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// multi-skin tone emoji, where if you have for example the permutation
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// [.dark, .dark], it is consolidated to just [.dark], to be initialized
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// with either variant and result in the correct emoji.
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self.skinTones = skinTones?.reduce(into: [Emoji.SkinTone]()) { result, skinTone in
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guard !result.contains(skinTone) else { return }
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result.append(skinTone)
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}
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}
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var rawValue: String {
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if let skinTones = skinTones {
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return baseEmoji.emojiPerSkinTonePermutation?[skinTones] ?? baseEmoji.rawValue
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} else {
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return baseEmoji.rawValue
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}
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}
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}
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extension Emoji {
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private static let keyValueStore = SDSKeyValueStore(collection: "Emoji+PreferredSkinTonePermutation")
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static func allSendableEmojiByCategoryWithPreferredSkinTones(transaction: YapDatabaseReadTransaction) -> [Category: [EmojiWithSkinTones]] {
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return Category.allCases.reduce(into: [Category: [EmojiWithSkinTones]]()) { result, category in
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result[category] = category.normalizedEmoji.filter { $0.available }.map { $0.withPreferredSkinTones(transaction: transaction) }
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}
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}
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func withPreferredSkinTones(transaction: YapDatabaseReadTransaction) -> EmojiWithSkinTones {
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guard let rawSkinTones = Self.keyValueStore.getObject(forKey: rawValue, transaction: transaction) as? [String] else {
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return EmojiWithSkinTones(baseEmoji: self, skinTones: nil)
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}
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return EmojiWithSkinTones(baseEmoji: self, skinTones: rawSkinTones.compactMap { SkinTone(rawValue: $0) })
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}
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func setPreferredSkinTones(_ preferredSkinTonePermutation: [SkinTone]?, transaction: YapDatabaseReadWriteTransaction) {
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if let preferredSkinTonePermutation = preferredSkinTonePermutation {
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Self.keyValueStore.setObject(preferredSkinTonePermutation.map { $0.rawValue }, key: rawValue, transaction: transaction)
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} else {
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Self.keyValueStore.removeValue(forKey: rawValue, transaction: transaction)
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}
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}
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init?(_ string: String) {
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guard let emojiWithSkinTonePermutation = EmojiWithSkinTones(rawValue: string) else { return nil }
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self = emojiWithSkinTonePermutation.baseEmoji
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}
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}
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// MARK: -
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extension String {
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// This is slightly more accurate than String.isSingleEmoji,
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// but slower.
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//
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// * This will reject "lone modifiers".
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// * This will reject certain edge cases such as 🌈️.
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var isSingleEmojiUsingEmojiWithSkinTones: Bool {
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EmojiWithSkinTones(rawValue: self) != nil
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}
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}
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