/**
 * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
 * *
 * Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see  <http://www.gnu.org/licenses/>.
 *
 */

/**
 * This file works in conjunction with lib/html_script_finder/js_web_labels.js
 * to find mentions of external JavaScript files and their license information.
 * This allows the dom_handler to allow them by default.
 */

// find table.
exports.getLicenseList = function (document) {
    var tbl = document.getElementById("jslicense-labels1"),
        jsList = [],
        i = 0,
        le,
        rows,
        link,
        fileCell,
        licenseCell,
        sourceCell,
        row;

    if (tbl) {
        try {
            rows = tbl.getElementsByTagName("tr");
            le = rows.length;
            var mockElem = { textContent: "Unknown", href: "Unknown" };
            // loop through rows, and add each valid element to
            // the array.
            for (; i < le; i++) {
                row = rows[i].getElementsByTagName('td');

                if (row[0] && row[0].getElementsByTagName('a')[0]) {
                    fileCell = row[0].getElementsByTagName('a')[0];
                } else {
                    fileCell = mockElem;
                }

                if (row[1] && row[1].getElementsByTagName('a')[0]) {
                    licenseCell = row[1].getElementsByTagName('a')[0];
                } else {
                    licenseCell = mockElem;
                }

                if (row[2] && row[2].getElementsByTagName('a')[0]) {
                    sourceCell = row[2].getElementsByTagName('a')[0];
                } else {
                    sourceCell = mockElem;
                }
                if (fileCell.href !== 'Unknown') {
                    jsList.push({
                        'fileName': fileCell.textContent,
                        'fileUrl': fileCell.href,
                        'fileHash': null, // we'll fill this with value when needed to compare script.

                        'licenseName': licenseCell.textContent,
                        'licenseUrl': licenseCell.href, // this will now be a magnet link, most likely.

                        'sourceName': sourceCell.textContent,
                        'sourceUrl': sourceCell.href
                    });
                }
            }
        } catch (e) {
            console.debug(
                "Error fetching JS Web Label licenses",
                e, e.lineNumber, e.fileName, "index is", i);
        }
    }

    return jsList;
};
