require('dotenv').config();

const { WebhookClient,
        MessageEmbed } = require('discord.js');
const Parser = require('rss-parser');
const Enmap  = require('enmap');
const client = new WebhookClient(process.env.WH_ID, process.env.WH_TOKEN, { disableMentions: 'everyone' });
const parser = new Parser();
const db     = new Enmap({ name: 'db' });

let update = async () => {
    try {
        const feed = await parser.parseURL(process.env.FEED_URL);
        feed.items.forEach(async item => {
            if (!db.get(item.guid)) {
                db.set(item.guid, true);
                sendWH(item, feed);
            }
        });
    } catch(e) {
        console.error(e);
        client.send(''+e).catch();
    }
}

update();
//setInterval(update, 15000);

/**
 * 
 * @param {Parser.Item} item 
 * @param {Parser.Output} feed
 */
let sendWH = async (item, feed) => {
    let embed = new MessageEmbed()
        .setAuthor(item.title || 'Untitled', feed.image?.link, item.link || feed.link)
        .setDescription(`[Link](${item.link} "${item.link.replace('"', '\\"')}") | [Guid](${item.guid} "${item.guid.replace('"', '\\"')}")\n\n`
        + `${item.contentSnippet}`)
        .setTimestamp(Date.parse(item.isoDate) || Date.now())
    client.send({ username: feed.title, avatarURL: feed.image?.link, embeds: [ embed ] });
}