firefish/packages/backend/src/models/repositories/channel.ts

import { db } from "@/db/postgre.js";
import { Channel } from "@/models/entities/channel.js";
import type { Packed } from "@/misc/schema.js";
import { DriveFiles, ChannelFollowings, NoteUnreads } from "../index.js";
import type { User } from "@/models/entities/user.js";

export const ChannelRepository = db.getRepository(Channel).extend({
	async pack(
		src: Channel["id"] | Channel,
		me?: { id: User["id"] } | null | undefined,
	): Promise<Packed<"Channel">> {
		const channel =
			typeof src === "object" ? src : await this.findOneByOrFail({ id: src });
		const meId = me ? me.id : null;

		const banner = channel.bannerId
			? await DriveFiles.findOneBy({ id: channel.bannerId })
			: null;

		const hasUnreadNote = meId
			? (await NoteUnreads.findOneBy({
					noteChannelId: channel.id,
					userId: meId,
				})) != null
			: undefined;

		const following = meId
			? await ChannelFollowings.findOneBy({
					followerId: meId,
					followeeId: channel.id,
				})
			: null;

		return {
			id: channel.id,
			createdAt: channel.createdAt.toISOString(),
			lastNotedAt: channel.lastNotedAt
				? channel.lastNotedAt.toISOString()
				: null,
			name: channel.name,
			description: channel.description,
			userId: channel.userId,
			bannerId: channel.bannerId,
			bannerUrl: banner ? DriveFiles.getPublicUrl(banner, false) : null,
			usersCount: channel.usersCount,
			notesCount: channel.notesCount,

			...(me
				? {
						isFollowing: following != null,
						hasUnreadNote,
					}
				: {}),
		};
	},
});