Function fetchRemoteImages

lib/output/modifiers/fetchRemoteImages.js:16–42

Fetch all remote images @param {String} rootFolder @param {String} currentFile @param {HTMLDom} $ @return {Promise}

(rootFolder, currentFile, $)

    @return {Promise}
*/
function fetchRemoteImages(rootFolder, currentFile, $) {
    var currentDirectory = path.dirname(currentFile);

    return editHTMLElement($, 'img', function($img) {
        var src = $img.attr('src');
        var extension = path.extname(src);

        if (!LocationUtils.isExternal(src)) {
            return;
        }

        // We avoid generating twice the same PNG
        var hash = crc.crc32(src).toString(16);
        var fileName = hash + extension;
        var filePath = path.join(rootFolder, fileName);

        return fs.assertFile(filePath, function() {
            return fs.download(src, filePath);
        })
        .then(function() {
            // Convert to relative
            src = LocationUtils.relative(currentDirectory, fileName);

            $img.replaceWith('<img src="' + src + '" />');
        });
    });
}

module.exports = fetchRemoteImages;