134 lines
3.5 KiB
JavaScript
134 lines
3.5 KiB
JavaScript
const discord = require("discord.js");
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require("dotenv").config();
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// for some reason, node.js's built-in fetch function doesn't work for this
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// also node-fetch doesn't like being required
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const fetch = (...args) => import("node-fetch").then(n => n.default(...args));
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const client = new discord.Client({
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intents: [
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discord.GatewayIntentBits.Guilds,
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discord.GatewayIntentBits.GuildMessages,
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discord.GatewayIntentBits.MessageContent,
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],
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sweepers: {
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messages: {
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lifetime: 3600,
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interval: 3600,
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}
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}
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});
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// grab data from an instagram url
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async function fetchData(url) {
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const res = await fetch(url, {
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headers: {
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'User-Agent': 'curl/8.1.0',
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'Accept': '*/*'
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},
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credentials: "omit",
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});
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if(!res.ok) {
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console.log("oops. fetching instagram link returned bad status", res.statusText);
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return;
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}
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const text = await res.text();
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// here's where the wacky stuff happens
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// okay so instagram for some reason includes a full JSON-LD dump of
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// the post in the html returned, in this script tag
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// i just need to find the boundaries and parse the json
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let index = text.indexOf('<script type="application/ld+json"');
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if(index < 0) {
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console.log("couldn't find json data in html");
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return;
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}
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let json = text.substring(index);
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json = json.replace(/^<script type="application\/ld\+json"( nonce="[^"]+")?>/, "");
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console.log("Found JSON");
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index = json.indexOf('}</script>');
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if(index < 0) {
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console.log("couldn't find end of json data in html");
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return;
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}
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json = json.substring(0, index+1);
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let data;
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try {
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data = JSON.parse(json);
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} catch(err) {
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console.log("couldn't parse json", err);
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return;
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}
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return data;
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}
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client.on("messageCreate", async message => {
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if(message.author.bot) {
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return;
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}
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if(!/^https?:\/\/(www\.)?instagram\.com\/reel/.test(message.content)) {
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return;
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}
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const url = message.content.split(" ")[0];
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console.log("Fetching content for URL: " + url);
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let data;
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try {
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data = await fetchData(url);
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} catch(err) {
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console.log("Error fetching, retrying:", err);
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try {
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data = await fetchData(url);
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} catch(err) {
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console.log("Error fetching URL: " + url);
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console.log("Error:", err);
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message.channel.send("Failed to fetch data for link");
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return;
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}
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}
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if(!data) {
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console.log("data is empty");
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message.channel.send("Link had no data, or something went wrong");
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return;
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}
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const sendObj = {
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embeds: [{
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author: {
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name: data?.author?.alternateName,
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icon_url: data?.author?.image,
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},
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title: data?.author?.name,
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description: data?.headline,
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}],
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files: (data.video || []).map(d => d.contentUrl)
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};
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const interval = setInterval(() => message.channel.sendTyping().catch(() => {}), 3000);
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let success = true;
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try {
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console.log("posting...");
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message.channel.sendTyping().catch(() => {});
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await message.channel.send(sendObj);
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} catch(err) {
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console.log("Error posting to discord, attempting backup:", err);
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sendObj.content = sendObj.files.join(" ");
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delete sendObj.files;
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try {
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await message.channel.send(sendObj);
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} catch(err) {
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console.log("error posting backup", err);
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success = false;
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}
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}
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if(success) console.log("posted!");
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clearInterval(interval);
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});
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client.login(process.env.TOKEN).then(() => console.log("Logged into Discord as", client.user.username + "#" + client.user.discriminator));
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