1 files changed, 45 insertions, 0 deletions
diff --git a/packages/frontend/src/instance.ts b/packages/frontend/src/instance.ts
new file mode 100644
index 0000000000..51464f32fb
--- /dev/null
+++ b/packages/frontend/src/instance.ts
@@ -0,0 +1,45 @@
+import { computed, reactive } from 'vue';
+import * as Misskey from 'misskey-js';
+import { api } from './os';
+
+// TODO: 他のタブと永続化されたstateを同期
+
+const instanceData = localStorage.getItem('instance');
+
+// TODO: instanceをリアクティブにするかは再考の余地あり
+
+export const instance: Misskey.entities.InstanceMetadata = reactive(instanceData ? JSON.parse(instanceData) : {
+	// TODO: set default values
+});
+
+export async function fetchInstance() {
+	const meta = await api('meta', {
+		detail: false,
+	});
+
+	for (const [k, v] of Object.entries(meta)) {
+		instance[k] = v;
+	}
+
+	localStorage.setItem('instance', JSON.stringify(instance));
+}
+
+export const emojiCategories = computed(() => {
+	if (instance.emojis == null) return [];
+	const categories = new Set();
+	for (const emoji of instance.emojis) {
+		categories.add(emoji.category);
+	}
+	return Array.from(categories);
+});
+
+export const emojiTags = computed(() => {
+	if (instance.emojis == null) return [];
+	const tags = new Set();
+	for (const emoji of instance.emojis) {
+		for (const tag of emoji.aliases) {
+			tags.add(tag);
+		}
+	}
+	return Array.from(tags);
+});