diff --git a/api/src/routes/channels/#channel_id/recipients.ts b/api/src/routes/channels/#channel_id/recipients.ts
index ea6bc563..c7beeee8 100644
--- a/api/src/routes/channels/#channel_id/recipients.ts
+++ b/api/src/routes/channels/#channel_id/recipients.ts
@@ -1,5 +1,57 @@
-import { Router, Response, Request } from "express";
+import { Request, Response, Router } from "express";
+import { Channel, ChannelRecipientAddEvent, ChannelType, DiscordApiErrors, DmChannelDTO, emitEvent, PublicUserProjection, Recipient, User } from "@fosscord/util";
+
const router: Router = Router();
-// TODO:
+
+router.put("/:user_id", 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(new Recipient({ 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", 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;
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