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import {
RelationshipAddEvent,
User,
PublicUserProjection,
RelationshipType,
RelationshipRemoveEvent,
emitEvent,
Relationship,
Config
} from "@fosscord/util";
import { Router, Response, Request } from "express";
import { HTTPError } from "lambert-server";
import { DiscordApiErrors } from "../../../util/Constants";
import { check, Length } from "../../../util/instanceOf";
const router = Router();
const userProjection: (keyof User)[] = ["relationships", ...PublicUserProjection];
router.get("/", async (req: Request, res: Response) => {
const user = await User.findOneOrFail({ where: { id: req.user_id }, select: ["relationships"] });
return res.json(user.relationships);
});
async function updateRelationship(req: Request, res: Response, friend: User, type: RelationshipType) {
const id = friend.id;
if (id === req.user_id) throw new HTTPError("You can't add yourself as a friend");
const user = await User.findOneOrFail({ id: req.user_id }, { relations: ["relationships"], select: userProjection });
var relationship = user.relationships.find((x) => x.id === id);
const friendRequest = friend.relationships.find((x) => x.id === req.user_id);
// TODO: you can add infinitely many blocked users (should this be prevented?)
if (type === RelationshipType.blocked) {
if (relationship) {
if (relationship.type === RelationshipType.blocked) throw new HTTPError("You already blocked the user");
relationship.type = RelationshipType.blocked;
} else {
relationship = new Relationship({ id, type: RelationshipType.blocked });
user.relationships.push(relationship);
}
if (friendRequest && friendRequest.type !== RelationshipType.blocked) {
friend.relationships.remove(friendRequest);
await Promise.all([
user.save(),
emitEvent({
event: "RELATIONSHIP_REMOVE",
data: friendRequest,
user_id: id
} as RelationshipRemoveEvent)
]);
}
await Promise.all([
user.save(),
emitEvent({
event: "RELATIONSHIP_ADD",
data: {
...relationship,
user: { ...friend }
},
user_id: req.user_id
} as RelationshipAddEvent)
]);
return res.sendStatus(204);
}
const { maxFriends } = Config.get().limits.user;
if (user.relationships.length >= maxFriends) throw DiscordApiErrors.MAXIMUM_FRIENDS.withParams(maxFriends);
var incoming_relationship = new Relationship({ nickname: undefined, type: RelationshipType.incoming, id: req.user_id });
var outgoing_relationship = new Relationship({ nickname: undefined, type: RelationshipType.outgoing, id });
if (friendRequest) {
if (friendRequest.type === RelationshipType.blocked) throw new HTTPError("The user blocked you");
// accept friend request
incoming_relationship = friendRequest;
incoming_relationship.type = RelationshipType.friends;
outgoing_relationship.type = RelationshipType.friends;
} else friend.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.relationships.push(outgoing_relationship);
await Promise.all([
user.save(),
friend.save(),
emitEvent({
event: "RELATIONSHIP_ADD",
data: {
...outgoing_relationship,
user: { ...friend }
},
user_id: req.user_id
} as RelationshipAddEvent),
emitEvent({
event: "RELATIONSHIP_ADD",
data: {
...incoming_relationship,
should_notify: true,
user: { ...user }
},
user_id: id
} as RelationshipAddEvent)
]);
return res.sendStatus(204);
}
router.put("/:id", check({ $type: new Length(Number, 1, 4) }), async (req: Request, res: Response) => {
return await updateRelationship(
req,
res,
await User.findOneOrFail({ id: req.params.id }, { relations: ["relationships"], select: userProjection }),
req.body.type
);
});
router.post("/", check({ discriminator: String, username: String }), async (req: Request, res: Response) => {
return await updateRelationship(
req,
res,
await User.findOneOrFail({
relations: ["relationships"],
select: userProjection,
where: req.body as { discriminator: string; username: string }
}),
req.body.type
);
});
router.delete("/:id", async (req: Request, res: Response) => {
const { id } = req.params;
if (id === req.user_id) throw new HTTPError("You can't remove yourself as a friend");
const user = await User.findOneOrFail({ id: req.user_id }, { select: userProjection, relations: ["relationships"] });
const friend = await User.findOneOrFail({ id: id }, { select: userProjection, relations: ["relationships"] });
const relationship = user.relationships.find((x) => x.id === id);
const friendRequest = friend.relationships.find((x) => x.id === req.user_id);
if (relationship?.type === RelationshipType.blocked) {
// unblock user
user.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.relationships.remove(relationship);
friend.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;
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