epub-full-text-search/dist/lib/Normalize-URL/MetaDataParser.js

Sample Application

'use strict';

var _xml2js = require('xml2js');

var _xml2js2 = _interopRequireDefault(_xml2js);

var _q = require('q');

var _q2 = _interopRequireDefault(_q);

var _Helper = require('./../Helper');

var _Helper2 = _interopRequireDefault(_Helper);

var _Logger = require('./../Logger');

var _Logger2 = _interopRequireDefault(_Logger);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var parser = new _xml2js2.default.Parser(),
    parseString = _q2.default.denodeify(parser.parseString);

var MetaDataParser = {};
var container = 'container.xml';

MetaDataParser.getMetaDataFromUrl = function (urlToEpub) {

    var containerLink = urlToEpub + 'META-INF/' + container;

    return new Promise(function (resolve, reject) {

        _Helper2.default.getContent(containerLink).then(function (xmlString) {
            return getManifest(xmlString);
        }).then(function (result) {
            var opfFile = urlToEpub + result;
            return _Helper2.default.getContent(opfFile);
        }).then(function (opfContent) {
            return _q2.default.all([getBookTitle(opfContent), getSpineItems(opfContent)]);
        }).then(function (results) {
            resolve({
                title: results[0],
                spineItems: results[1],
                url: urlToEpub
            });
        }).catch(function (err) {
            _Logger2.default.log('error', err);
            reject(err);
        });
    });
};

function getManifest(data) {

    return parseString(data).then(function (result) {
        return result.container.rootfiles[0].rootfile[0].$['full-path'];
    }).fail(function (err) {
        _Logger2.default.log('error', err);
    });
}

function getBookTitle(data) {
    return parseString(data).then(function (result) {
        var metadata = result.package.metadata[0];
        return metadata['dc:title'][0]._ || metadata['dc:title'][0];
    }).fail(function (err) {
        _Logger2.default.log('error', err);
    });
}

function getSpineItems(data) {

    return parseString(data).then(function (r) {

        var manifest = r.package.manifest[0];
        var spine = r.package.spine[0];

        var result = [];

        for (var i = 0; i < spine.itemref.length; i++) {

            var spineItem = manifest.item.filter(function (value) {

                if (value.$.id === spine.itemref[i].$.idref) return value;
            });

            var spineitem = {};
            spineitem.id = spineItem[0].$.id;
            spineitem.href = spineItem[0].$.href;
            spineitem.baseCfi = "/" + '6' + "/" + (i + 1) * 2 + '[' + spineitem.id + ']!';

            result.push(spineitem);
        }

        return result;
    }).fail(function (err) {
        _Logger2.default.log('error', err);
    });
}

module.exports = MetaDataParser;