76 lines
2.5 KiB
JavaScript
76 lines
2.5 KiB
JavaScript
//my imports
|
|
const DiscordUtil = require("discordjs-util");
|
|
|
|
//external lib imports
|
|
const Dns = require("dns");
|
|
const Url = require("url");
|
|
const FeedRead = require("feed-read");
|
|
|
|
module.exports = class FeedData {
|
|
constructor({ url, channelName, roleName, cachedLinks }) {
|
|
this.url = url;
|
|
this.channelName = channelName;
|
|
this.roleName = roleName;
|
|
this.cachedLinks = cachedLinks | [];
|
|
}
|
|
|
|
/**
|
|
* Returns a promise providing all the links posted in the last 100 messages
|
|
* @param {Discord.Guild} guild The guild this feed belongs to
|
|
* @returns {Promise<string[]>} Links posted in last 100 messages
|
|
*/
|
|
updatePastPostedLinks(guild) {
|
|
const channel = guild.channels.find(ch => ch.type === "text" && ch.name === this.channelName);
|
|
|
|
return new Promise((resolve, reject) => {
|
|
channel.fetchMessages({ limit: 100 })
|
|
.then(messages => {
|
|
messages.forEach(m => Array.prototype.push.apply(this.cachedLinks, getUrls(m))); //push all the links in each message into our links array
|
|
resolve(this);
|
|
})
|
|
.catch(reject);
|
|
});
|
|
}
|
|
|
|
check(guild) {
|
|
Dns.resolve(Url.parse(this.url).host, err => { //check we can resolve the host, so we can throw an appropriate error if it fails
|
|
if (err)
|
|
DiscordUtil.dateError("Connection Error: Can't resolve host", err); //log our error if we can't resolve the host
|
|
else
|
|
FeedRead(this.url, (err, articles) => { //check the feed
|
|
if (err)
|
|
DiscordUtil.dateError(err);
|
|
else {
|
|
let latest = articles[0]; //extract the latest link
|
|
latest = normaliseUrl(latest); //standardise it a bit
|
|
|
|
//if we don't have it cached already, cache it and callback
|
|
if (!this.cachedLinks.includes(latest)) {
|
|
this.cachedLinks.push(latest);
|
|
post(guild, latest);
|
|
}
|
|
}
|
|
});
|
|
});
|
|
}
|
|
};
|
|
|
|
function post(guild, url){
|
|
const channel = guild.channels.first(ch => ch.type === "text" && ch.name.toLower() === this.channelName.toLower());
|
|
channel.send(url);
|
|
}
|
|
|
|
function normaliseUrl(url) {
|
|
url = url.replace("https://", "http://"); //cheaty way to get around http and https not matching
|
|
|
|
if (Url.parse(url).host.includes("youtu")) //detect youtu.be and youtube.com - yes I know it's hacky
|
|
url = url.split("&")[0]; //quick way to chop off stuff like &feature=youtube
|
|
|
|
url = url.replace("http://www.youtube.com/watch?v=", "http://youtu.be/"); //turn full url into share url
|
|
|
|
return url;
|
|
}
|
|
|
|
function getUrls(str) {
|
|
return str.match(/(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig);
|
|
} |