refactoring

Resolve #7779

packages/backend/src/misc/reaction-lib.ts

@@ -0,0 +1,129 @@
+import { emojiRegex } from './emoji-regex';
+import { fetchMeta } from './fetch-meta';
+import { Emojis } from '@/models/index';
+import { toPunyNullable } from './convert-host';
+
+const legacies: Record<string, string> = {
+	'like':     '👍',
+	'love':     '❤', // ここに記述する場合は異体字セレクタを入れない
+	'laugh':    '😆',
+	'hmm':      '🤔',
+	'surprise': '😮',
+	'congrats': '🎉',
+	'angry':    '💢',
+	'confused': '😥',
+	'rip':      '😇',
+	'pudding':  '🍮',
+	'star':     '⭐',
+};
+
+export async function getFallbackReaction(): Promise<string> {
+	const meta = await fetchMeta();
+	return meta.useStarForReactionFallback ? '⭐' : '👍';
+}
+
+export function convertLegacyReactions(reactions: Record<string, number>) {
+	const _reactions = {} as Record<string, number>;
+
+	for (const reaction of Object.keys(reactions)) {
+		if (reactions[reaction] <= 0) continue;
+
+		if (Object.keys(legacies).includes(reaction)) {
+			if (_reactions[legacies[reaction]]) {
+				_reactions[legacies[reaction]] += reactions[reaction];
+			} else {
+				_reactions[legacies[reaction]] = reactions[reaction];
+			}
+		} else {
+			if (_reactions[reaction]) {
+				_reactions[reaction] += reactions[reaction];
+			} else {
+				_reactions[reaction] = reactions[reaction];
+			}
+		}
+	}
+
+	const _reactions2 = {} as Record<string, number>;
+
+	for (const reaction of Object.keys(_reactions)) {
+		_reactions2[decodeReaction(reaction).reaction] = _reactions[reaction];
+	}
+
+	return _reactions2;
+}
+
+export async function toDbReaction(reaction?: string | null, reacterHost?: string | null): Promise<string> {
+	if (reaction == null) return await getFallbackReaction();
+
+	reacterHost = toPunyNullable(reacterHost);
+
+	// 文字列タイプのリアクションを絵文字に変換
+	if (Object.keys(legacies).includes(reaction)) return legacies[reaction];
+
+	// Unicode絵文字
+	const match = emojiRegex.exec(reaction);
+	if (match) {
+		// 合字を含む1つの絵文字
+		const unicode = match[0];
+
+		// 異体字セレクタ除去
+		return unicode.match('\u200d') ? unicode : unicode.replace(/\ufe0f/g, '');
+	}
+
+	const custom = reaction.match(/^:([\w+-]+)(?:@\.)?:$/);
+	if (custom) {
+		const name = custom[1];
+		const emoji = await Emojis.findOne({
+			host: reacterHost || null,
+			name,
+		});
+
+		if (emoji) return reacterHost ? `:${name}@${reacterHost}:` : `:${name}:`;
+	}
+
+	return await getFallbackReaction();
+}
+
+type DecodedReaction = {
+	/**
+	 * リアクション名 (Unicode Emoji or ':name@hostname' or ':name@.')
+	 */
+	reaction: string;
+
+	/**
+	 * name (カスタム絵文字の場合name, Emojiクエリに使う)
+	 */
+	name?: string;
+
+	/**
+	 * host (カスタム絵文字の場合host, Emojiクエリに使う)
+	 */
+	host?: string | null;
+};
+
+export function decodeReaction(str: string): DecodedReaction {
+	const custom = str.match(/^:([\w+-]+)(?:@([\w.-]+))?:$/);
+
+	if (custom) {
+		const name = custom[1];
+		const host = custom[2] || null;
+
+		return {
+			reaction: `:${name}@${host || '.'}:`,	// ローカル分は@以降を省略するのではなく.にする
+			name,
+			host
+		};
+	}
+
+	return {
+		reaction: str,
+		name: undefined,
+		host: undefined
+	};
+}
+
+export function convertLegacyReaction(reaction: string): string {
+	reaction = decodeReaction(reaction).reaction;
+	if (Object.keys(legacies).includes(reaction)) return legacies[reaction];
+	return reaction;
+}