enhance: 非ログイン時には別サーバーに遷移できるように (#13089)

* enhance: 非ログイン時にはMisskey Hub経由で別サーバーに遷移できるように

* fix

* サーバーサイド照会を削除

* クライアント側の照会動作

* hubを経由せずにリモートで続行できるように

* fix と pleaseLogin誘導箇所の追加

* fix

* fix

* Update CHANGELOG.md

---------

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

4 files changed, 102 insertions, 73 deletions

diff --git a/packages/frontend/src/pages/flash/flash.vue b/packages/frontend/src/pages/flash/flash.vue
index 40499fde0e..8a63176d00 100644
--- a/packages/frontend/src/pages/flash/flash.vue
+++ b/packages/frontend/src/pages/flash/flash.vue
@@ -79,6 +79,7 @@ import { defaultStore } from '@/store.js';
 import { $i } from '@/account.js';
 import { isSupportShare } from '@/scripts/navigator.js';
 import copyToClipboard from '@/scripts/copy-to-clipboard.js';
+import { pleaseLogin } from '@/scripts/please-login.js';
 
 const props = defineProps<{
 	id: string;
@@ -143,6 +144,7 @@ function shareWithNote() {
 
 function like() {
 	if (!flash.value) return;
+	pleaseLogin();
 
 	os.apiWithDialog('flash/like', {
 		flashId: flash.value.id,
@@ -154,6 +156,7 @@ function like() {
 
 async function unlike() {
 	if (!flash.value) return;
+	pleaseLogin();
 
 	const confirm = await os.confirm({
 		type: 'warning',
diff --git a/packages/frontend/src/pages/follow.vue b/packages/frontend/src/pages/follow.vue
deleted file mode 100644
index 247b0ac639..0000000000
--- a/packages/frontend/src/pages/follow.vue
+++ /dev/null
@@ -1,71 +0,0 @@
-<!--
-SPDX-FileCopyrightText: syuilo and misskey-project
-SPDX-License-Identifier: AGPL-3.0-only
--->
-
-<template>
-<div>
-</div>
-</template>
-
-<script lang="ts" setup>
-import { } from 'vue';
-import * as Misskey from 'misskey-js';
-import * as os from '@/os.js';
-import { misskeyApi } from '@/scripts/misskey-api.js';
-import { i18n } from '@/i18n.js';
-import { defaultStore } from '@/store.js';
-import { mainRouter } from '@/router/main.js';
-
-async function follow(user): Promise<void> {
-	const { canceled } = await os.confirm({
-		type: 'question',
-		text: i18n.tsx.followConfirm({ name: user.name || user.username }),
-	});
-
-	if (canceled) {
-		window.close();
-		return;
-	}
-
-	os.apiWithDialog('following/create', {
-		userId: user.id,
-		withReplies: defaultStore.state.defaultWithReplies,
-	});
-	user.withReplies = defaultStore.state.defaultWithReplies;
-}
-
-const acct = new URL(location.href).searchParams.get('acct');
-if (acct == null) {
-	throw new Error('acct required');
-}
-
-let promise;
-
-if (acct.startsWith('https://')) {
-	promise = misskeyApi('ap/show', {
-		uri: acct,
-	});
-	promise.then(res => {
-		if (res.type === 'User') {
-			follow(res.object);
-		} else if (res.type === 'Note') {
-			mainRouter.push(`/notes/${res.object.id}`);
-		} else {
-			os.alert({
-				type: 'error',
-				text: 'Not a user',
-			}).then(() => {
-				window.close();
-			});
-		}
-	});
-} else {
-	promise = misskeyApi('users/show', Misskey.acct.parse(acct));
-	promise.then(user => {
-		follow(user);
-	});
-}
-
-os.promiseDialog(promise, null, null, i18n.ts.fetchingAsApObject);
-</script>
diff --git a/packages/frontend/src/pages/lookup.vue b/packages/frontend/src/pages/lookup.vue
new file mode 100644
index 0000000000..3233953942
--- /dev/null
+++ b/packages/frontend/src/pages/lookup.vue
@@ -0,0 +1,97 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<MkStickyContainer>
+	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
+	<MkSpacer :contentMax="800">
+		<div v-if="state === 'done'" class="_buttonsCenter">
+			<MkButton @click="close">{{ i18n.ts.close }}</MkButton>
+			<MkButton @click="goToMisskey">{{ i18n.ts.goToMisskey }}</MkButton>
+		</div>
+		<div v-else class="_fullInfo">
+			<MkLoading/>
+		</div>
+	</MkSpacer>
+</MkStickyContainer>
+</template>
+
+<script lang="ts" setup>
+import { computed, ref } from 'vue';
+import * as Misskey from 'misskey-js';
+import * as os from '@/os.js';
+import { misskeyApi } from '@/scripts/misskey-api.js';
+import { i18n } from '@/i18n.js';
+import { definePageMetadata } from '@/scripts/page-metadata.js';
+import { mainRouter } from '@/router/main.js';
+import MkButton from '@/components/MkButton.vue';
+
+const state = ref<'fetching' | 'done'>('fetching');
+
+function fetch() {
+	const params = new URL(location.href).searchParams;
+
+	// acctのほうはdeprecated
+	let uri = params.get('uri') ?? params.get('acct');
+	if (uri == null) {
+		state.value = 'done';
+		return;
+	}
+
+	let promise: Promise<any>;
+
+	if (uri.startsWith('https://')) {
+		promise = misskeyApi('ap/show', {
+			uri,
+		});
+		promise.then(res => {
+			if (res.type === 'User') {
+				mainRouter.replace(res.object.host ? `/@${res.object.username}@${res.object.host}` : `/@${res.object.username}`);
+			} else if (res.type === 'Note') {
+				mainRouter.replace(`/notes/${res.object.id}`);
+			} else {
+				os.alert({
+					type: 'error',
+					text: 'Not a user',
+				});
+			}
+		});
+	} else {
+		if (uri.startsWith('acct:')) {
+			uri = uri.slice(5);
+		}
+		promise = misskeyApi('users/show', Misskey.acct.parse(uri));
+		promise.then(user => {
+			mainRouter.replace(user.host ? `/@${user.username}@${user.host}` : `/@${user.username}`);
+		});
+	}
+
+	os.promiseDialog(promise, null, null, i18n.ts.fetchingAsApObject);
+}
+
+function close(): void {
+	window.close();
+
+	// 閉じなければ100ms後タイムラインに
+	window.setTimeout(() => {
+		location.href = '/';
+	}, 100);
+}
+
+function goToMisskey(): void {
+	location.href = '/';
+}
+
+fetch();
+
+const headerActions = computed(() => []);
+
+const headerTabs = computed(() => []);
+
+definePageMetadata({
+	title: i18n.ts.lookup,
+	icon: 'ti ti-world-search',
+});
+</script>
diff --git a/packages/frontend/src/pages/user/home.vue b/packages/frontend/src/pages/user/home.vue
index 834d799072..d67990e9a2 100644
--- a/packages/frontend/src/pages/user/home.vue
+++ b/packages/frontend/src/pages/user/home.vue
@@ -32,9 +32,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 							</div>
 						</div>
 						<span v-if="$i && $i.id != user.id && user.isFollowed" class="followed">{{ i18n.ts.followsYou }}</span>
-						<div v-if="$i" class="actions">
+						<div class="actions">
 							<button class="menu _button" @click="menu"><i class="ti ti-dots"></i></button>
-							<MkFollowButton v-if="$i.id != user.id" v-model:user="user" :inline="true" :transparent="false" :full="true" class="koudoku"/>
+							<MkFollowButton v-if="$i?.id != user.id" v-model:user="user" :inline="true" :transparent="false" :full="true" class="koudoku"/>
 						</div>
 					</div>
 					<MkAvatar class="avatar" :user="user" indicator/>