カスタム絵文字一覧情報をmetaから分離

packages/frontend/src/custom-emojis.ts

@@ -0,0 +1,48 @@
+import { api } from './os';
+import { miLocalStorage } from './local-storage';
+
+const storageCache = miLocalStorage.getItem('emojis');
+let cached = storageCache ? JSON.parse(storageCache) : null;
+export async function getCustomEmojis() {
+	const now = Date.now();
+	const lastFetchedAt = miLocalStorage.getItem('lastEmojisFetchedAt');
+	if (cached && lastFetchedAt && (now - parseInt(lastFetchedAt)) < 1000 * 60 * 60) return cached;
+
+	const res = await api('emojis', {});
+
+	cached = res.emojis;
+	miLocalStorage.setItem('emojis', JSON.stringify(cached));
+	miLocalStorage.setItem('lastEmojisFetchedAt', now.toString());
+}
+
+let cachedCategories;
+export async function getCustomEmojiCategories() {
+	if (cachedCategories) return cachedCategories;
+
+	const customEmojis = await getCustomEmojis();
+
+	const categories = new Set();
+	for (const emoji of customEmojis) {
+		categories.add(emoji.category);
+	}
+	const res = Array.from(categories);
+	cachedCategories = res;
+	return res;
+}
+
+let cachedTags;
+export async function getCustomEmojiTags() {
+	if (cachedTags) return cachedTags;
+
+	const customEmojis = await getCustomEmojis();
+
+	const tags = new Set();
+	for (const emoji of customEmojis) {
+		for (const tag of emoji.aliases) {
+			tags.add(tag);
+		}
+	}
+	const res = Array.from(tags);
+	cachedTags = res;
+	return res;
+}