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import { handleMessage, postHandleMessage, route } from "@fosscord/api";
import {
Attachment,
Channel,
ChannelType,
Config,
DmChannelDTO,
emitEvent,
getPermission,
HTTPError,
Member,
Message,
MessageCreateEvent,
MessageCreateSchema,
Snowflake,
uploadFile
} from "@fosscord/util";
import { Request, Response, Router } from "express";
import multer from "multer";
import { FindManyOptions, LessThan, MoreThan } from "typeorm";
import { URL } from "url";
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:
case ChannelType.GUILD_FORUM:
case ChannelType.DIRECTORY:
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:
case ChannelType.ENCRYPTED:
case ChannelType.ENCRYPTED_THREAD:
return true;
default:
throw new HTTPError("unimplemented", 400);
}
}
// 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({ where: { id: channel_id } });
if (!channel) throw new HTTPError("Channel not found", 404);
isTextChannel(channel.type);
const around = req.query.around ? `${req.query.around}` : undefined;
const before = req.query.before ? `${req.query.before}` : undefined;
const after = req.query.after ? `${req.query.after}` : undefined;
const limit = Number(req.query.limit) || 50;
if (limit < 1 || limit > 100) throw new HTTPError("limit must be between 1 and 100", 422);
let halfLimit = Math.floor(limit / 2);
const permissions = await getPermission(req.user_id, channel.guild_id, channel_id);
permissions.hasThrow("VIEW_CHANNEL");
if (!permissions.has("READ_MESSAGE_HISTORY")) return res.json([]);
let query: FindManyOptions<Message> & { where: { id?: any } } = {
order: { id: "DESC" },
take: limit,
where: { channel_id },
relations: ["author", "webhook", "application", "mentions", "mention_roles", "mention_channels", "sticker_items", "attachments"]
};
if (after) {
if (after > new Snowflake()) return res.status(422);
query.where.id = MoreThan(after);
} else if (before) {
if (before < req.params.channel_id) return res.status(422);
query.where.id = LessThan(before);
} else if (around) {
query.where.id = [
MoreThan((BigInt(around) - BigInt(halfLimit)).toString()),
LessThan((BigInt(around) + BigInt(halfLimit)).toString())
];
}
const messages = await Message.find(query);
const endpoint = Config.get().cdn.endpointPublic;
return res.json(
messages.map((x: any) => {
(x.reactions || []).forEach((x: any) => {
// @ts-ignore
if ((x.user_ids || []).includes(req.user_id)) x.me = true;
// @ts-ignore
delete x.user_ids;
});
// @ts-ignore
if (!x.author) x.author = { id: "4", discriminator: "0000", username: "Fosscord Ghost", public_flags: "0", avatar: null };
x.attachments?.forEach((y: any) => {
// dynamically set attachment proxy_url in case the endpoint changed
const uri = y.proxy_url.startsWith("http") ? y.proxy_url : `https://example.org${y.proxy_url}`;
y.proxy_url = `${endpoint == null ? "" : endpoint}${new URL(uri).pathname}`;
});
/**
Some clients ( discord.js ) only check if a property exists within the response,
which causes erorrs when, say, the `application` property is `null`.
**/
for (let curr in x) {
if (x[curr] === null) delete x[curr];
}
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
https://discord.com/developers/docs/resources/channel#create-message
TODO: text channel slowdown (per-user and across-users)
Q: trim and replace message content and every embed field A: NO, given this cannot be implemented in E2EE channels
TODO: only dispatch notifications for mentions denoted in allowed_mentions
**/
// Send message
router.post(
"/",
messageUpload.any(),
async (req, res, next) => {
if (req.body.payload_json) {
req.body = JSON.parse(req.body.payload_json);
}
next();
},
route({ body: "MessageCreateSchema", permission: "SEND_MESSAGES", right: "SEND_MESSAGES" }),
async (req: Request, res: Response) => {
const { channel_id } = req.params;
let body = req.body as MessageCreateSchema;
const attachments: Attachment[] = [];
const channel = await Channel.findOneOrFail({ where: { id: channel_id }, relations: ["recipients", "recipients.user"] });
if (!channel.isWritable()) {
throw new HTTPError(`Cannot send messages to channel of type ${channel.type}`, 400);
}
const files = (req.files as Express.Multer.File[]) ?? [];
for (let currFile of files) {
try {
const file: any = await uploadFile(`/attachments/${channel.id}`, currFile);
attachments.push({ ...file, proxy_url: file.url });
} catch (error) {
return res.status(400).json(error);
}
}
const embeds = body.embeds || [];
if (body.embed) embeds.push(body.embed);
let message = await handleMessage({
...body,
type: 0,
pinned: false,
author_id: req.user_id,
embeds,
channel_id,
attachments,
edited_timestamp: undefined,
timestamp: new Date()
});
channel.last_message_id = message.id;
if (channel.isDm()) {
const channel_dto = await DmChannelDTO.from(channel);
// Only one recipients should be closed here, since in group DMs the recipient is deleted not closed
Promise.all(
channel.recipients!.map((recipient) => {
if (recipient.closed) {
recipient.closed = false;
return Promise.all([
recipient.save(),
emitEvent({
event: "CHANNEL_CREATE",
data: channel_dto.excludedRecipients([recipient.user_id]),
user_id: recipient.user_id
})
]);
}
})
);
}
//Defining member fields
var member = await Member.findOneOrFail({ where: { id: req.user_id }, relations: ["roles"] });
// TODO: This doesn't work either
// member.roles = member.roles.filter((role) => {
// return role.id !== role.guild_id;
// }).map((role) => {
// return role.id;
// });
message.member = member;
// TODO: Figure this out
// delete message.member.last_message_id;
// delete message.member.index;
await Promise.all([
message.save(),
emitEvent({ event: "MESSAGE_CREATE", channel_id: channel_id, data: message } as MessageCreateEvent),
message.guild_id ? Member.update({ id: req.user_id, guild_id: message.guild_id }, { last_message_id: message.id }) : null,
channel.save()
]);
postHandleMessage(message).catch((e) => {}); // no await as it shouldnt block the message send function and silently catch error
return res.json(message);
}
);
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