125 lines
4.4 KiB
TypeScript
125 lines
4.4 KiB
TypeScript
import { ChannelModel, Embed, Message, MessageCreateEvent, MessageUpdateEvent } from "@fosscord/server-util";
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import { Snowflake } from "@fosscord/server-util";
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import { MessageModel } from "@fosscord/server-util";
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import { PublicMemberProjection } from "@fosscord/server-util";
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import { toObject } from "@fosscord/server-util";
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import { getPermission } from "@fosscord/server-util";
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import { HTTPError } from "lambert-server";
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import fetch from "node-fetch";
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import cheerio from "cheerio";
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import { emitEvent } from "./Event";
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// TODO: check webhook, application, system author
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const LINK_REGEX = /https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)/g;
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const DEFAULT_FETCH_OPTIONS: any = {
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redirect: "follow",
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follow: 1,
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headers: {
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"user-agent": "Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)"
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},
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size: 1024 * 1024 * 1,
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compress: true,
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method: "GET"
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};
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export async function handleMessage(opts: Partial<Message>) {
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const channel = await ChannelModel.findOne({ id: opts.channel_id }, { guild_id: true, type: true, permission_overwrites: true }).exec();
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if (!channel || !opts.channel_id) throw new HTTPError("Channel not found", 404);
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// TODO: are tts messages allowed in dm channels? should permission be checked?
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const permissions = await getPermission(opts.author_id, channel.guild_id, opts.channel_id, { channel });
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permissions.hasThrow("SEND_MESSAGES");
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if (opts.tts) permissions.hasThrow("SEND_TTS_MESSAGES");
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if (opts.message_reference) {
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permissions.hasThrow("READ_MESSAGE_HISTORY");
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if (opts.message_reference.guild_id !== channel.guild_id) throw new HTTPError("You can only reference messages from this guild");
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}
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if (opts.message_reference) {
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if (opts.message_reference.channel_id !== opts.channel_id) throw new HTTPError("You can only reference messages from this channel");
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// TODO: should be checked if the referenced message exists?
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}
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// TODO: check and put it all in the body
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return {
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...opts,
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guild_id: channel.guild_id,
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channel_id: opts.channel_id,
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// TODO: generate mentions and check permissions
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mention_channels_ids: [],
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mention_role_ids: [],
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mention_user_ids: [],
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attachments: [], // TODO: message attachments
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embeds: opts.embeds || [],
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reactions: opts.reactions || [],
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type: opts.type ?? 0
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};
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}
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// TODO: cache link result in db
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export async function postHandleMessage(message: Message) {
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var links = message.content?.match(LINK_REGEX);
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if (!links) return;
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const data = { ...message };
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data.embeds = data.embeds.filter((x) => x.type !== "link");
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links = links.slice(0, 5); // embed max 5 links
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for (const link of links) {
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try {
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const request = await fetch(link, DEFAULT_FETCH_OPTIONS);
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const text = await request.text();
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const $ = cheerio.load(text);
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const title = $('meta[property="og:title"]').attr("content");
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const provider_name = $('meta[property="og:site_name"]').text();
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const author_name = $('meta[property="article:author"]').attr("content");
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const description = $('meta[property="og:description"]').attr("content") || $('meta[property="description"]').attr("content");
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const image = $('meta[property="og:image"]').attr("content");
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const url = $('meta[property="og:url"]').attr("content");
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// TODO: color
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const embed: Embed = {
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provider: {
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url: link,
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name: provider_name
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}
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};
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if (author_name) embed.author = { name: author_name };
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if (image) embed.thumbnail = { proxy_url: image, url: image };
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if (title) embed.title = title;
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if (url) embed.url = url;
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if (description) embed.description = description;
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if (title || description) {
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data.embeds.push(embed);
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}
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} catch (error) {}
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}
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await Promise.all([
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emitEvent({
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event: "MESSAGE_UPDATE",
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guild_id: message.guild_id,
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channel_id: message.channel_id,
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data
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} as MessageUpdateEvent),
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MessageModel.updateOne({ id: message.id, channel_id: message.channel_id }, data).exec()
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]);
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}
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export async function sendMessage(opts: Partial<Message>) {
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const message = await handleMessage({ ...opts, id: Snowflake.generate(), timestamp: new Date() });
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const data = toObject(await new MessageModel(message).populate({ path: "member", select: PublicMemberProjection }).save());
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await emitEvent({ event: "MESSAGE_CREATE", channel_id: opts.channel_id, data, guild_id: message.guild_id } as MessageCreateEvent);
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postHandleMessage(data); // no await as it shouldnt block the message send function
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return data;
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}
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