86 lines
2.8 KiB
JavaScript
86 lines
2.8 KiB
JavaScript
var console = require("console");
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var Dns = require("dns");
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var Url = require("url");
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var Discord = require("discord.io");
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var FeedRead = require("feed-read");
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var BotConfig = require("./botConfig.json");
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var Config = require("./config.json");
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//get a URL object from the feedUrl so we can examine it and check connectivity later
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var url = Url.parse(Config.feedUrl);
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//placeholder for our bot - we need to check for connectivity before assigning this though
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var bot;
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//check if we can connect to discordapp.com to authenticate the bot
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Dns.resolve("discordapp.com", function (err) {
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if (err) console.log("CONNECTION ERROR: Unable to locate discordapp.com to authenticate the bot (you are probably not connected to the internet). Details: " + (err.message || err));
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else {
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//if there was no error, go ahead and create and authenticate the bot
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bot = new Discord.Client({
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token: BotConfig.token,
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autorun: true
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});
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//when the bot is ready, set a polling interval for the rss feed
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bot.on("ready", function () {
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console.log(bot.username + " - (" + bot.id + ")");
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setInterval(checkFeedAndPost, Config.pollingInterval);
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});
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//easy way to check if the bot is active - replies "pong" when you type "ping" in discord
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bot.on("message", function (user, userID, channelID, message) {
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if (message === "ping") {
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bot.sendMessage({
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to: channelID,
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message: "pong"
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});
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}
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});
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}
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});
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function checkFeedAndPost() {
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//check that we have an internet connection (well not exactly - check that we have a connection to the host of the feedUrl)
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Dns.resolve(url.host, function (err) {
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if (err) console.log("CONNECTION ERROR: Cannot resolve host (you are probably not connected to the internet). Details: " + (err.message || err));
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else {
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//check the feed asynchronously, check the latest link when done
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FeedRead(Config.feedUrl, function (err, articles) {
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try {
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checkLinkAndPost(err, articles);
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}
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catch (ex) {
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//checkFeedAndPost is async due to being called by setInterval so the console log has to be here
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console.log("FEED ERROR: " + (ex.message || ex));
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}
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});
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}
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});
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}
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//checks if the link has been posted previously, posts if not
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function checkLinkAndPost(err, articles) {
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if (err) throw "Error reading RSS feed: " + (err.message || err);
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var latestLink = articles[0].link;
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//get the latest 100 messages (100 is the limit)
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bot.getMessages({
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channelID: Config.channelID,
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limit: 100
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}, function (err, messages) {
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if (err) throw err;
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//get an array of strings from the array of message objects
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var messageContents = messages.map((message) => { return message.content; });
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//if the messageContents array doesn't include the latest link, post it
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if (!messageContents.includes(latestLink))
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bot.sendMessage({
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to: Config.channelID,
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message: latestLink
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});
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});
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} |