// Finalize Nodejs Script
// 1 - Append JS in HTML Document
// 2 - Gzip HTML
// 3 - Covert to Raw Bytes
// 4 - ( Save to File: webpage.h ) in dist Folder
const fs = require('fs');
const zlib = require('zlib');
const { gzip } = require('@gfx/zopfli');
function getByteArray(file){
let fileData = file.toString('hex');
let result = [];
for (let i = 0; i < fileData.length; i+=2)
result.push('0x'+fileData[i]+''+fileData[i+1]);
return result;
}
let js = fs.readFileSync(__dirname+'/dist/js/app.js');
let html = `
WebSerial
`;
// Gzip the index.html file with JS Code.
const gzippedIndex = zlib.gzipSync(html, {'level': zlib.constants.Z_BEST_COMPRESSION});
let indexHTML = getByteArray(gzippedIndex);
let source =
`
const uint32_t WEBSERIAL_HTML_SIZE = ${indexHTML.length};
const uint8_t WEBSERIAL_HTML[] PROGMEM = { ${indexHTML} };
`;
fs.writeFileSync(__dirname+'/dist/webpage.h', source, 'utf8');
// Produce a second variant with zopfli
// Zopfli is a improved zip algorithm by google
// Takes much more time and maybe is not available on every machine
const input = html;
gzip(input, {numiterations: 15}, (err, output) => {
indexHTML = output;
let source =
`
const uint32_t WEBSERIAL_HTML_SIZE = ${indexHTML.length};
const uint8_t WEBSERIAL_HTML[] PROGMEM = { ${indexHTML} };
`;
fs.writeFileSync(__dirname + '/dist/webpage_zopfli.h', source, 'utf8');
});