refactor(frontend): 非ログイン画面でのmeta取得を減らす (#13776)

* refactor(frontend): 非ログイン画面でのmeta取得を減らす

* fix(frontend): サーバー供給のmetaとクライアントフォールバックで取れるmetaの型が違うのを修正

* force fetch meta at welcome.vue

* refactor

6 files changed, 18 insertions, 40 deletions

diff --git a/packages/frontend/src/components/MkFeaturedPhotos.vue b/packages/frontend/src/components/MkFeaturedPhotos.vue
index 8d875790bc..c42c692db0 100644
--- a/packages/frontend/src/components/MkFeaturedPhotos.vue
+++ b/packages/frontend/src/components/MkFeaturedPhotos.vue
@@ -4,19 +4,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div v-if="meta" :class="$style.root" :style="{ backgroundImage: `url(${ meta.backgroundImageUrl })` }"></div>
+<div v-if="instance" :class="$style.root" :style="{ backgroundImage: `url(${ instance.backgroundImageUrl })` }"></div>
 </template>
 
 <script lang="ts" setup>
-import { ref } from 'vue';
-import * as Misskey from 'misskey-js';
-import { misskeyApi } from '@/scripts/misskey-api.js';
-
-const meta = ref<Misskey.entities.MetaResponse>();
-
-misskeyApi('meta', { detail: true }).then(gotMeta => {
-	meta.value = gotMeta;
-});
+import { instance } from '@/instance.js';
 </script>
 
 <style lang="scss" module>
diff --git a/packages/frontend/src/components/MkVisitorDashboard.vue b/packages/frontend/src/components/MkVisitorDashboard.vue
index be80baa774..611c7be216 100644
--- a/packages/frontend/src/components/MkVisitorDashboard.vue
+++ b/packages/frontend/src/components/MkVisitorDashboard.vue
@@ -4,19 +4,19 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div v-if="meta" :class="$style.root">
+<div v-if="instance" :class="$style.root">
 	<div :class="[$style.main, $style.panel]">
 		<img :src="instance.iconUrl || '/favicon.ico'" alt="" :class="$style.mainIcon"/>
 		<button class="_button _acrylic" :class="$style.mainMenu" @click="showMenu"><i class="ti ti-dots"></i></button>
 		<div :class="$style.mainFg">
 			<h1 :class="$style.mainTitle">
 				<!-- 背景色によってはロゴが見えなくなるのでとりあえず無効に -->
-				<!-- <img class="logo" v-if="meta.logoImageUrl" :src="meta.logoImageUrl"><span v-else class="text">{{ instanceName }}</span> -->
+				<!-- <img class="logo" v-if="instance.logoImageUrl" :src="instance.logoImageUrl"><span v-else class="text">{{ instanceName }}</span> -->
 				<span>{{ instanceName }}</span>
 			</h1>
 			<div :class="$style.mainAbout">
 				<!-- eslint-disable-next-line vue/no-v-html -->
-				<div v-html="meta.description || i18n.ts.headlineMisskey"></div>
+				<div v-html="instance.description || i18n.ts.headlineMisskey"></div>
 			</div>
 			<div v-if="instance.disableRegistration" :class="$style.mainWarn">
 				<MkInfo warn>{{ i18n.ts.invitationRequiredToRegister }}</MkInfo>
@@ -66,13 +66,8 @@ import { instance } from '@/instance.js';
 import MkNumber from '@/components/MkNumber.vue';
 import XActiveUsersChart from '@/components/MkVisitorDashboard.ActiveUsersChart.vue';
 
-const meta = ref<Misskey.entities.MetaResponse | null>(null);
 const stats = ref<Misskey.entities.StatsResponse | null>(null);
 
-misskeyApi('meta', { detail: true }).then(_meta => {
-	meta.value = _meta;
-});
-
 misskeyApi('stats', {}).then((res) => {
 	stats.value = res;
 });
diff --git a/packages/frontend/src/instance.ts b/packages/frontend/src/instance.ts
index 22337e7eb9..7df6ec205c 100644
--- a/packages/frontend/src/instance.ts
+++ b/packages/frontend/src/instance.ts
@@ -28,7 +28,7 @@ if (providedAt > cachedAt) {
 
 // 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.MetaResponse = reactive(cachedMeta ?? {});
+export const instance: Misskey.entities.MetaDetailed = reactive(cachedMeta ?? {});
 
 export const serverErrorImageUrl = computed(() => instance.serverErrorImageUrl ?? DEFAULT_SERVER_ERROR_IMAGE_URL);
 
@@ -38,7 +38,7 @@ export const notFoundImageUrl = computed(() => instance.notFoundImageUrl ?? DEFA
 
 export const isEnabledUrlPreview = computed(() => instance.enableUrlPreview ?? true);
 
-export async function fetchInstance(force = false): Promise<void> {
+export async function fetchInstance(force = false): Promise<Misskey.entities.MetaDetailed> {
 	if (!force) {
 		const cachedAt = miLocalStorage.getItem('instanceCachedAt') ? parseInt(miLocalStorage.getItem('instanceCachedAt')!) : 0;
 
@@ -48,7 +48,7 @@ export async function fetchInstance(force = false): Promise<void> {
 	}
 
 	const meta = await misskeyApi('meta', {
-		detail: false,
+		detail: true,
 	});
 
 	for (const [k, v] of Object.entries(meta)) {
@@ -57,4 +57,6 @@ export async function fetchInstance(force = false): Promise<void> {
 
 	miLocalStorage.setItem('instance', JSON.stringify(instance));
 	miLocalStorage.setItem('instanceCachedAt', Date.now().toString());
+
+	return instance;
 }
diff --git a/packages/frontend/src/pages/welcome.entrance.a.vue b/packages/frontend/src/pages/welcome.entrance.a.vue
index 6c05aad24f..d6ba397f1b 100644
--- a/packages/frontend/src/pages/welcome.entrance.a.vue
+++ b/packages/frontend/src/pages/welcome.entrance.a.vue
@@ -42,11 +42,11 @@ import XTimeline from './welcome.timeline.vue';
 import MarqueeText from '@/components/MkMarquee.vue';
 import MkFeaturedPhotos from '@/components/MkFeaturedPhotos.vue';
 import misskeysvg from '/client-assets/misskey.svg';
-import { misskeyApi, misskeyApiGet } from '@/scripts/misskey-api.js';
+import { misskeyApiGet } from '@/scripts/misskey-api.js';
 import MkVisitorDashboard from '@/components/MkVisitorDashboard.vue';
 import { getProxiedImageUrl } from '@/scripts/media-proxy.js';
+import { instance as meta } from '@/instance.js';
 
-const meta = ref<Misskey.entities.MetaResponse>();
 const instances = ref<Misskey.entities.FederationInstance[]>();
 
 function getInstanceIcon(instance: Misskey.entities.FederationInstance): string {
@@ -56,10 +56,6 @@ function getInstanceIcon(instance: Misskey.entities.FederationInstance): string
 	return getProxiedImageUrl(instance.iconUrl, 'preview');
 }
 
-misskeyApi('meta', { detail: true }).then(_meta => {
-	meta.value = _meta;
-});
-
 misskeyApiGet('federation/instances', {
 	sort: '+pubSub',
 	limit: 20,
diff --git a/packages/frontend/src/pages/welcome.vue b/packages/frontend/src/pages/welcome.vue
index 9ba6a5885e..915fe35025 100644
--- a/packages/frontend/src/pages/welcome.vue
+++ b/packages/frontend/src/pages/welcome.vue
@@ -4,8 +4,8 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div v-if="meta">
-	<XSetup v-if="meta.requireSetup"/>
+<div v-if="instance">
+	<XSetup v-if="instance.requireSetup"/>
 	<XEntrance v-else/>
 </div>
 </template>
@@ -16,13 +16,13 @@ import * as Misskey from 'misskey-js';
 import XSetup from './welcome.setup.vue';
 import XEntrance from './welcome.entrance.a.vue';
 import { instanceName } from '@/config.js';
-import { misskeyApi } from '@/scripts/misskey-api.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
+import { fetchInstance } from '@/instance.js';
 
-const meta = ref<Misskey.entities.MetaResponse | null>(null);
+const instance = ref<Misskey.entities.MetaDetailed | null>(null);
 
-misskeyApi('meta', { detail: true }).then(res => {
-	meta.value = res;
+fetchInstance(true).then((res) => {
+	instance.value = res;
 });
 
 const headerActions = computed(() => []);
diff --git a/packages/frontend/src/ui/visitor.vue b/packages/frontend/src/ui/visitor.vue
index 29b305d9bc..80623083cf 100644
--- a/packages/frontend/src/ui/visitor.vue
+++ b/packages/frontend/src/ui/visitor.vue
@@ -70,11 +70,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <script lang="ts" setup>
 import { onMounted, provide, ref, computed } from 'vue';
-import * as Misskey from 'misskey-js';
 import XCommon from './_common_/common.vue';
 import { instanceName } from '@/config.js';
 import * as os from '@/os.js';
-import { misskeyApi } from '@/scripts/misskey-api.js';
 import { instance } from '@/instance.js';
 import XSigninDialog from '@/components/MkSigninDialog.vue';
 import XSignupDialog from '@/components/MkSignupDialog.vue';
@@ -114,7 +112,6 @@ const isTimelineAvailable = ref(instance.policies?.ltlAvailable || instance.poli
 const showMenu = ref(false);
 const isDesktop = ref(window.innerWidth >= DESKTOP_THRESHOLD);
 const narrow = ref(window.innerWidth < 1280);
-const meta = ref<Misskey.entities.MetaResponse>();
 
 const keymap = computed(() => {
 	return {
@@ -128,10 +125,6 @@ const keymap = computed(() => {
 	};
 });
 
-misskeyApi('meta', { detail: true }).then(res => {
-	meta.value = res;
-});
-
 function signin() {
 	os.popup(XSigninDialog, {
 		autoSet: true,