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import { Router, Response, Request } from "express";
import { Attachment, ChannelModel, ChannelType, getPermission, MessageDocument, MessageModel, toObject } from "@fosscord/util";
import { HTTPError } from "lambert-server";
import { MessageCreateSchema } from "../../../../schema/Message";
import { check, instanceOf, Length } from "../../../../util/instanceOf";
import multer from "multer";
import { Query } from "mongoose";
import { sendMessage } from "../../../../util/Message";
import { uploadFile } from "../../../../util/cdn";
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: Request, res: Response) => {
const channel_id = req.params.channel_id;
const channel = await ChannelModel.findOne(
{ id: channel_id },
{ guild_id: true, type: true, permission_overwrites: true, recipient_ids: true, owner_id: true }
)
.lean() // lean is needed, because we don't want to populate .recipients that also auto deletes .recipient_ids
.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);
// @ts-ignore
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([]);
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(), $lt: (BigInt(around) + BigInt(halfLimit)).toString() }
});
else {
query = MessageModel.find({ channel_id });
}
query = query.sort({ id: -1 });
const messages = await query.limit(limit).exec();
return res.json(
toObject(messages).map((x) => {
(x.reactions || []).forEach((x) => {
// @ts-ignore
if ((x.user_ids || []).includes(req.user_id)) x.me = true;
// @ts-ignore
delete x.user_ids;
});
// @ts-ignore
if (!x.author) x.author = { discriminator: "0000", username: "Deleted User", public_flags: 0n, avatar: null };
return x;
})
);
});
// TODO: config max upload size
const messageUpload = multer({
limits: {
fileSize: 1024 * 1024 * 100,
fields: 10,
files: 1
},
storage: multer.memoryStorage()
}); // max upload 50 mb
// TODO: dynamically change limit of MessageCreateSchema with config
// TODO: check: sum of all characters in an embed structure must not exceed 6000 characters
// https://discord.com/developers/docs/resources/channel#create-message
// TODO: text channel slowdown
// TODO: trim and replace message content and every embed field
// TODO: check allowed_mentions
// Send message
router.post("/", messageUpload.single("file"), async (req: Request, res: Response) => {
const { channel_id } = req.params;
var body = req.body as MessageCreateSchema;
const attachments: Attachment[] = [];
if (req.file) {
try {
const file = await uploadFile(`/attachments/${channel_id}`, req.file);
attachments.push({ ...file, proxy_url: file.url });
} catch (error) {
return res.status(400).json(error);
}
}
if (body.payload_json) {
body = JSON.parse(body.payload_json);
}
const errors = instanceOf(MessageCreateSchema, body, { req });
if (errors !== true) throw errors;
const embeds = [];
if (body.embed) embeds.push(body.embed);
const data = await sendMessage({
...body,
type: 0,
pinned: false,
author_id: req.user_id,
embeds,
channel_id,
attachments,
edited_timestamp: null
});
return res.send(data);
});
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