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var crc = require('crc');
var path = require('path');
var imagesUtil = require('../../utils/images');
var fs = require('../../utils/fs');
var LocationUtils = require('../../utils/location');
var editHTMLElement = require('./editHTMLElement');
/**
Convert all inline PNG images to PNG file
@param {String} rootFolder
@param {HTMLDom} $
@return {Promise}
*/
function inlinePng(rootFolder, currentFile, $) {
var currentDirectory = path.dirname(currentFile);
return editHTMLElement($, 'img', function($img) {
var src = $img.attr('src');
if (!LocationUtils.isDataURI(src)) {
return;
}
// We avoid generating twice the same PNG
var hash = crc.crc32(src).toString(16);
var fileName = hash + '.png';
// Result file path
var filePath = path.join(rootFolder, fileName);
return fs.assertFile(filePath, function() {
return imagesUtil.convertInlinePNG(src, filePath);
})
.then(function() {
// Convert filename to a relative filename
fileName = LocationUtils.relative(currentDirectory, fileName);
// Replace src
$img.attr('src', fileName);
});
});
}
module.exports = inlinePng;
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