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import { Router } from "express";
import {
ChannelModel,
ChannelType,
getPermission,
Message,
MessageCreateEvent,
MessageDocument,
MessageModel,
Snowflake,
toObject,
} from "@fosscord/server-util";
import { HTTPError } from "lambert-server";
import { MessageCreateSchema } from "../../../../schema/Message";
import { check, instanceOf, Length } from "../../../../util/instanceOf";
import { PublicUserProjection } from "../../../../util/User";
import multer from "multer";
import { emitEvent } from "../../../../util/Event";
import { Query } from "mongoose";
import { PublicMemberProjection } from "../../../../util/Member";
const router: Router = Router();
export default router;
export function isTextChannel(type: ChannelType): boolean {
switch (type) {
case ChannelType.GUILD_VOICE:
case ChannelType.GUILD_CATEGORY:
throw new HTTPError("not a text channel", 400);
case ChannelType.DM:
case ChannelType.GROUP_DM:
case ChannelType.GUILD_NEWS:
case ChannelType.GUILD_STORE:
case ChannelType.GUILD_TEXT:
return true;
}
}
// https://discord.com/developers/docs/resources/channel#create-message
// get messages
router.get("/", async (req, res) => {
const channel_id = req.params.channel_id;
const channel = await ChannelModel.findOne({ id: channel_id }, { guild_id: true, type: true, permission_overwrites: true }).exec();
if (!channel) throw new HTTPError("Channel not found", 404);
isTextChannel(channel.type);
try {
instanceOf({ $around: String, $after: String, $before: String, $limit: new Length(Number, 1, 100) }, req.query, {
path: "query",
req,
});
} catch (error) {
return res.status(400).json({ code: 50035, message: "Invalid Query", success: false, errors: error });
}
var { around, after, before, limit }: { around?: string; after?: string; before?: string; limit?: number } = req.query;
if (!limit) limit = 50;
var halfLimit = Math.floor(limit / 2);
if ([ChannelType.GUILD_VOICE, ChannelType.GUILD_CATEGORY, ChannelType.GUILD_STORE].includes(channel.type))
throw new HTTPError("Not a text channel");
if (channel.guild_id) {
const permissions = await getPermission(req.user_id, channel.guild_id, channel_id, { channel });
permissions.hasThrow("VIEW_CHANNEL");
if (!permissions.has("READ_MESSAGE_HISTORY")) return res.json([]);
} else if (channel.recipients) {
// group/dm channel
if (!channel.recipients.includes(req.user_id)) throw new HTTPError("You don't have permission to view this channel", 401);
}
var query: Query<MessageDocument[], MessageDocument>;
if (after) query = MessageModel.find({ channel_id, id: { $gt: after } });
else if (before) query = MessageModel.find({ channel_id, id: { $lt: before } });
else if (around)
query = MessageModel.find({
channel_id,
id: { $gt: (BigInt(around) - BigInt(halfLimit)).toString(), $lt: (BigInt(around) + BigInt(halfLimit)).toString() },
});
else {
query = MessageModel.find({ channel_id }).sort({ id: -1 });
}
const messages = await query.limit(limit).exec();
return res.json(toObject(messages));
});
// TODO: config max upload size
const messageUpload = multer({ limits: { fieldSize: 1024 * 1024 * 1024 * 50 } }); // max upload 50 mb
// TODO: dynamically change limit of MessageCreateSchema with config
// TODO: check: sum of all characters in an embed structure must not exceed 6000 characters
// https://discord.com/developers/docs/resources/channel#create-message
// TODO: text channel slowdown
// TODO: trim and replace message content and every embed field
// Send message
router.post("/", check(MessageCreateSchema), async (req, res) => {
const channel_id = req.params.channel_id;
const body = req.body as MessageCreateSchema;
const channel = await ChannelModel.findOne({ id: channel_id }, { guild_id: true, type: true, permission_overwrites: true }).exec();
if (!channel) throw new HTTPError("Channel not found", 404);
// TODO: are tts messages allowed in dm channels? should permission be checked?
if (channel.guild_id) {
const permissions = await getPermission(req.user_id, channel.guild_id, channel_id, { channel });
permissions.hasThrow("SEND_MESSAGES");
if (body.tts) permissions.hasThrow("SEND_TTS_MESSAGES");
if (body.message_reference) {
permissions.hasThrow("READ_MESSAGE_HISTORY");
if (body.message_reference.guild_id !== channel.guild_id)
throw new HTTPError("You can only reference messages from this guild");
}
}
if (body.message_reference) {
if (body.message_reference.channel_id !== channel_id) throw new HTTPError("You can only reference messages from this channel");
// TODO: should be checked if the referenced message exists?
}
const embeds = [];
if (body.embed) embeds.push(body.embed);
// TODO: check and put all in body in it
const message: Message = {
id: Snowflake.generate(),
channel_id,
guild_id: channel.guild_id,
author_id: req.user_id,
content: body.content,
timestamp: new Date(),
mention_channels_ids: [],
mention_role_ids: [],
mention_user_ids: [],
attachments: [],
embeds: [],
reactions: [],
type: 0,
tts: body.tts,
nonce: body.nonce,
pinned: false,
};
const doc = await new MessageModel(message).populate({ path: "member", select: PublicMemberProjection }).save();
const data = toObject(doc);
await emitEvent({ event: "MESSAGE_CREATE", channel_id, data, guild_id: channel.guild_id } as MessageCreateEvent);
return res.send(data);
});
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