refactoring

Resolve #7779

packages/backend/src/server/api/endpoints/channels/show.ts

@@ -0,0 +1,43 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { ApiError } from '../../error';
+import { Channels } from '@/models/index';
+
+export const meta = {
+	tags: ['channels'],
+
+	requireCredential: false as const,
+
+	params: {
+		channelId: {
+			validator: $.type(ID),
+		},
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+		ref: 'Channel',
+	},
+
+	errors: {
+		noSuchChannel: {
+			message: 'No such channel.',
+			code: 'NO_SUCH_CHANNEL',
+			id: '6f6c314b-7486-4897-8966-c04a66a02923'
+		},
+	}
+};
+
+export default define(meta, async (ps, me) => {
+	const channel = await Channels.findOne({
+		id: ps.channelId,
+	});
+
+	if (channel == null) {
+		throw new ApiError(meta.errors.noSuchChannel);
+	}
+
+	return await Channels.pack(channel, me);
+});