✨ Friends Relationships

src/routes/users/@me/relationships.ts

@@ -0,0 +1,156 @@
+import {
+	RelationshipAddEvent,
+	UserModel,
+	PublicUserProjection,
+	toObject,
+	RelationshipType,
+	RelationshipRemoveEvent
+} from "@fosscord/server-util";
+import { Router } from "express";
+import { check, HTTPError } from "lambert-server";
+import { emitEvent } from "../../../util/Event";
+
+const router = Router();
+
+const userProjection = { "user_data.relationships": true, ...PublicUserProjection };
+
+router.put("/:id", check({ $type: Number }), async (req, res) => {
+	const { id } = req.params;
+	if (id === req.user_id) throw new HTTPError("You can't add yourself as a friend");
+	const body = req.body as { type?: number };
+
+	const user = await UserModel.findOne({ id: req.user_id }, userProjection).exec();
+	if (!user) throw new HTTPError("Invalid token", 400);
+
+	const friend = await UserModel.findOne({ id }, userProjection).exec();
+	if (!friend) throw new HTTPError("User not found", 404);
+
+	var relationship = user.user_data.relationships.find((x) => x.id === id);
+	const friendRequest = friend.user_data.relationships.find((x) => x.id === req.user_id);
+
+	if (body.type === RelationshipType.blocked) {
+		if (relationship) {
+			if (relationship.type === RelationshipType.blocked) throw new HTTPError("You already blocked the user");
+			relationship.type = RelationshipType.blocked;
+		} else {
+			relationship = { id, type: RelationshipType.blocked };
+			user.user_data.relationships.push(relationship);
+		}
+
+		if (friendRequest && friendRequest.type !== RelationshipType.blocked) {
+			friend.user_data.relationships.remove(friendRequest);
+			await Promise.all([
+				friend.save(),
+				emitEvent({
+					event: "RELATIONSHIP_REMOVE",
+					data: friendRequest,
+					user_id: id
+				} as RelationshipRemoveEvent)
+			]);
+		}
+
+		await Promise.all([
+			user.save(),
+			emitEvent({
+				event: "RELATIONSHIP_ADD",
+				data: {
+					...toObject(relationship),
+					user: { ...toObject(friend), user_data: undefined }
+				},
+				user_id: req.user_id
+			} as RelationshipAddEvent)
+		]);
+
+		return res.sendStatus(204);
+	}
+
+	var incoming_relationship = { id: req.user_id, nickname: undefined, type: RelationshipType.incoming };
+	var outgoing_relationship = { id, nickname: undefined, type: RelationshipType.outgoing };
+
+	if (friendRequest) {
+		if (friendRequest.type === RelationshipType.blocked) throw new HTTPError("The user blocked you");
+		// accept friend request
+		// @ts-ignore
+		incoming_relationship = friendRequest;
+		incoming_relationship.type = RelationshipType.friends;
+		outgoing_relationship.type = RelationshipType.friends;
+	} else friend.user_data.relationships.push(incoming_relationship);
+
+	if (relationship) {
+		if (relationship.type === RelationshipType.outgoing) throw new HTTPError("You already sent a friend request");
+		if (relationship.type === RelationshipType.blocked) throw new HTTPError("Unblock the user before sending a friend request");
+		if (relationship.type === RelationshipType.friends) throw new HTTPError("You are already friends with the user");
+	} else user.user_data.relationships.push(outgoing_relationship);
+
+	await Promise.all([
+		user.save(),
+		friend.save(),
+		emitEvent({
+			event: "RELATIONSHIP_ADD",
+			data: {
+				...outgoing_relationship,
+				user: { ...toObject(friend), user_data: undefined }
+			},
+			user_id: req.user_id
+		} as RelationshipAddEvent),
+		emitEvent({
+			event: "RELATIONSHIP_ADD",
+			data: {
+				...toObject(incoming_relationship),
+				should_notify: true,
+				user: { ...toObject(user), user_data: undefined }
+			},
+			user_id: id
+		} as RelationshipAddEvent)
+	]);
+
+	return res.sendStatus(204);
+});
+
+router.delete("/:id", async (req, res) => {
+	const { id } = req.params;
+	if (id === req.user_id) throw new HTTPError("You can't remove yourself as a friend");
+
+	const user = await UserModel.findOne({ id: req.user_id }).exec();
+	if (!user) throw new HTTPError("Invalid token", 400);
+
+	const friend = await UserModel.findOne({ id }, userProjection).exec();
+	if (!friend) throw new HTTPError("User not found", 404);
+
+	const relationship = user.user_data.relationships.find((x) => x.id === id);
+	const friendRequest = friend.user_data.relationships.find((x) => x.id === req.user_id);
+	if (relationship?.type === RelationshipType.blocked) {
+		// unblock user
+		user.user_data.relationships.remove(relationship);
+
+		await Promise.all([
+			user.save(),
+			emitEvent({ event: "RELATIONSHIP_REMOVE", user_id: req.user_id, data: relationship } as RelationshipRemoveEvent)
+		]);
+		return res.sendStatus(204);
+	}
+	if (!relationship || !friendRequest) throw new HTTPError("You are not friends with the user", 404);
+	if (friendRequest.type === RelationshipType.blocked) throw new HTTPError("The user blocked you");
+
+	user.user_data.relationships.remove(relationship);
+	friend.user_data.relationships.remove(friendRequest);
+
+	await Promise.all([
+		user.save(),
+		friend.save(),
+		emitEvent({
+			event: "RELATIONSHIP_REMOVE",
+			data: relationship,
+			user_id: req.user_id
+		} as RelationshipRemoveEvent),
+		emitEvent({
+			event: "RELATIONSHIP_REMOVE",
+			data: friendRequest,
+			user_id: id
+		} as RelationshipRemoveEvent)
+	]);
+
+	return res.sendStatus(204);
+});
+
+export default router;