1 files changed, 67 insertions, 0 deletions
diff --git a/src/api/routes/channels/#channel_id/recipients.ts b/src/api/routes/channels/#channel_id/recipients.ts
new file mode 100644
index 00000000..25854415
--- /dev/null
+++ b/src/api/routes/channels/#channel_id/recipients.ts
@@ -0,0 +1,67 @@
+import { Request, Response, Router } from "express";
+import {
+	Channel,
+	ChannelRecipientAddEvent,
+	ChannelType,
+	DiscordApiErrors,
+	DmChannelDTO,
+	emitEvent,
+	PublicUserProjection,
+	Recipient,
+	User
+} from "@fosscord/util";
+import { route } from "@fosscord/api";
+
+const router: Router = Router();
+
+router.put("/:user_id", route({}), async (req: Request, res: Response) => {
+	const { channel_id, user_id } = req.params;
+	const channel = await Channel.findOneOrFail({ where: { id: channel_id }, relations: ["recipients"] });
+
+	if (channel.type !== ChannelType.GROUP_DM) {
+		const recipients = [...channel.recipients!.map((r) => r.user_id), user_id].unique();
+
+		const new_channel = await Channel.createDMChannel(recipients, req.user_id);
+		return res.status(201).json(new_channel);
+	} else {
+		if (channel.recipients!.map((r) => r.user_id).includes(user_id)) {
+			throw DiscordApiErrors.INVALID_RECIPIENT; //TODO is this the right error?
+		}
+
+		channel.recipients!.push(Recipient.create({ channel_id: channel_id, user_id: user_id }));
+		await channel.save();
+
+		await emitEvent({
+			event: "CHANNEL_CREATE",
+			data: await DmChannelDTO.from(channel, [user_id]),
+			user_id: user_id
+		});
+
+		await emitEvent({
+			event: "CHANNEL_RECIPIENT_ADD",
+			data: {
+				channel_id: channel_id,
+				user: await User.findOneOrFail({ where: { id: user_id }, select: PublicUserProjection })
+			},
+			channel_id: channel_id
+		} as ChannelRecipientAddEvent);
+		return res.sendStatus(204);
+	}
+});
+
+router.delete("/:user_id", route({}), async (req: Request, res: Response) => {
+	const { channel_id, user_id } = req.params;
+	const channel = await Channel.findOneOrFail({ where: { id: channel_id }, relations: ["recipients"] });
+	if (!(channel.type === ChannelType.GROUP_DM && (channel.owner_id === req.user_id || user_id === req.user_id)))
+		throw DiscordApiErrors.MISSING_PERMISSIONS;
+
+	if (!channel.recipients!.map((r) => r.user_id).includes(user_id)) {
+		throw DiscordApiErrors.INVALID_RECIPIENT; //TODO is this the right error?
+	}
+
+	await Channel.removeRecipientFromChannel(channel, user_id);
+
+	return res.sendStatus(204);
+});
+
+export default router;