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import { Router, Response, Request } from "express";
import { Attachment, Channel, ChannelType, Embed, getPermission, Message } from "@fosscord/util";
import { HTTPError } from "lambert-server";
import { route } from "@fosscord/api";
import multer from "multer";
import { sendMessage } from "@fosscord/api";
import { uploadFile } from "@fosscord/api";
import { FindManyOptions, LessThan, MoreThan } from "typeorm";
const router: Router = Router();
export default router;
export function isTextChannel(type: ChannelType): boolean {
switch (type) {
case ChannelType.GUILD_STORE:
case ChannelType.GUILD_VOICE:
case ChannelType.GUILD_STAGE_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_NEWS_THREAD:
case ChannelType.GUILD_PUBLIC_THREAD:
case ChannelType.GUILD_PRIVATE_THREAD:
case ChannelType.GUILD_TEXT:
return true;
}
}
export interface MessageCreateSchema {
content?: string;
nonce?: string;
tts?: boolean;
flags?: string;
embeds?: Embed[];
embed?: Embed;
// TODO: ^ embed is deprecated in favor of embeds (https://discord.com/developers/docs/resources/channel#message-object)
allowed_mentions?: {
parse?: string[];
roles?: string[];
users?: string[];
replied_user?: boolean;
};
message_reference?: {
message_id: string;
channel_id: string;
guild_id?: string;
fail_if_not_exists?: boolean;
};
payload_json?: string;
file?: any;
attachments?: any[]; //TODO we should create an interface for attachments
}
// 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 Channel.findOneOrFail({ id: channel_id });
if (!channel) throw new HTTPError("Channel not found", 404);
isTextChannel(channel.type);
const around = `${req.query.around}`;
const before = `${req.query.before}`;
const after = `${req.query.after}`;
const limit = Number(req.query.limit) || 50;
if (limit < 1 || limit > 100) throw new HTTPError("limit must be between 1 and 100");
var halfLimit = Math.floor(limit / 2);
const permissions = await getPermission(req.user_id, channel.guild_id, channel_id);
permissions.hasThrow("VIEW_CHANNEL");
if (!permissions.has("READ_MESSAGE_HISTORY")) return res.json([]);
var query: FindManyOptions<Message> & { where: { id?: any } } = {
order: { id: "DESC" },
take: limit,
where: { channel_id },
relations: ["author", "webhook", "application", "mentions", "mention_roles", "mention_channels", "sticker_items", "attachments"]
};
if (after) query.where.id = MoreThan(after);
else if (before) query.where.id = LessThan(before);
else if (around) {
query.where.id = [
MoreThan((BigInt(around) - BigInt(halfLimit)).toString()),
LessThan((BigInt(around) + BigInt(halfLimit)).toString())
];
}
const messages = await Message.find(query);
return res.json(
messages.map((x) => {
(x.reactions || []).forEach((x: any) => {
// @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: "0", 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, res, next) => {
if (req.body.payload_json) {
req.body = JSON.parse(req.body.payload_json);
}
next();
},
route({ body: "MessageCreateSchema", permission: "SEND_MESSAGES" }),
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/${req.params.channel_id}`, req.file);
attachments.push({ ...file, proxy_url: file.url });
} catch (error) {
return res.status(400).json(error);
}
}
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: undefined
});
return res.json(data);
}
);
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