/*
 * Copyright (C) 2018 Guido Berhoerster <guido+feed-preview@berhoerster.name>
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

'use strict';

async function buildFeedSelection() {
    let tabs = await browser.tabs.query({active: true, currentWindow: true});
    let feeds = await browser.runtime.sendMessage(tabs[0].id);

    let feedListElement = document.querySelector('.panel-section-list');
    feedListElement.addEventListener('click', ev => {
        // find selected list item element and open the feed in a new tab
        for (let element = ev.target; element !== ev.currentTarget;
                element = element.parentElement) {
            if (element.classList.contains('panel-list-item')) {
                browser.tabs.create({url: element.dataset.href});
                break;
            }
        }
        ev.preventDefault();
    });

    let templateElement = document.querySelector('#feed-item-template');
    for (let feed of feeds) {
        let feedNode = document.importNode(templateElement.content, true);
        feedNode.querySelector('.panel-list-item').dataset.href = feed.href;

        let prefix = (feed.type === 'application/atom+xml') ? 'Atom Feed' :
                'RSS Feed';

        let imgNode = feedNode.querySelector('.icon > img');
        imgNode.src = browser.runtime.getURL('icons/feed-preview.svg');
        imgNode.alt = prefix;

        feedNode.querySelector('.text').textContent =
                `${prefix}: ${feed.title}`;
        feedListElement.appendChild(feedNode);
    }
}

buildFeedSelection();