This code is a JavaScript implementation that imports modules and sets up variables for a universal project, including a rate limit and file system module. It defines several functions for outputting Angular app code slowly, compressing code, and handling errors, and executes the main workflow by fetching Angular app code, compressing it, and outputting script pieces.

Cell 2

var importer = require('../Core');
var searchProvider = importer.import("search notebook provider");
var lzw = importer.import("lzw compress");

var PROFILE_PATH = process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE;
var project = PROFILE_PATH + '/universal';
if (!fs.existsSync(project)) {
    fs.mkdirSync(project);
}

var rateLimit = 900000;

function outputSlowly(r, out) {
    var counter = 0;
    return new Promise(resolve => {
        var interval;
        var scriptPieces = Math.ceil(r.scripts.length / rateLimit);
        console.log(scriptPieces + ' pieces');
        interval = setInterval(() => {
            if (counter < scriptPieces) {
                out(r.scripts.substr(counter * rateLimit, rateLimit), counter, scriptPieces);
            } else {
                clearInterval(interval);
                resolve(r.compress);
            }
            counter++;
        }, 1100);
    });
};

function compress(code) {
    console.log('Compressing...');
    return ({compress: r[0].code, scripts: lzw.compressToBase64(code.scripts + code.chunks)});
};

$.async();
try {
    displAngular(project, '/search')
        .then(r => {
            $.html(r.html, true);
            return compress(r);
        })
        .then(r => {
            console.log('App will be available in ');
            return outputSlowly(r, (c, i, t) => {
                console.log((t - i) + ' - ' + c.substr(0, 10));
                $.html(`<script>
if(!doc.app) { doc.app=''; }
doc.app+=` + JSON.stringify(c) + `;
</script>`, true);
            });
        })
        .then(compress => $.html(`<script>
eval(decodeURI(` + JSON.stringify(encodeURI(compress)) + `));
doc.document.write(LZString.decompressFromBase64(doc.app));
doc.document.close();
</script>`, true))
        .then(() => searchProvider())
        .then(() => $.sendResult())
        .catch(e => $.sendError(e));
} catch (e) {
    $.sendError(e);
}

// Import required modules
const fs = require('fs');
const { importModules } = require('../Core');
const searchProvider = importModules('search notebook provider');
const lzw = importModules('lzw compress');

// Define environment variables
const PROFILE_PATH = process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE;

// Define project path and create directory if it doesn't exist
const projectPath = `${PROFILE_PATH}/universal`;
if (!fs.existsSync(projectPath)) {
    fs.mkdirSync(projectPath, { recursive: true });
}

// Define rate limit for script output
const rateLimit = 900000;
const rateLimitPerSecond = rateLimit / (1100 / 1000); // Convert milliseconds to seconds
console.log(`Outputting scripts at a rate of ${rateLimitPerSecond} per second`);

// Function to output scripts slowly
async function outputScriptsSlowly(r, out) {
    const scriptPieces = Math.ceil(r.scripts.length / rateLimit);
    console.log(`Outputting ${scriptPieces} pieces of script code`);

    for (let i = 0; i < scriptPieces; i++) {
        try {
            const chunk = r.scripts.substr(i * rateLimit, rateLimit);
            await out(chunk, i, scriptPieces);
        } catch (error) {
            console.error(`Error outputting script piece ${i}:`, error);
            break;
        }
    }

    return r.compress;
}

// Function to compress code
async function compressCode(code) {
    console.log('Compressing code...');
    return {
        compress: code.code[0],
        scripts: await lzw.compressToBase64(code.scripts + code.chunks),
    };
}

// Main function
async function main() {
    try {
        // Get search results
        const searchResults = await displAngular(projectPath, '/search');
        $.html(searchResults.html, true);

        // Compress code
        const compressedCode = await compressCode(searchResults);

        // Output scripts slowly
        const decompressedCode = await outputScriptsSlowly(compressedCode, (c, i, t) => {
            console.log(`${t - i} - ${c.substr(0, 10)}`);
            $.html(``, true);
        });

        // Add script to document
        $.html(``, true);

        // Send search results
        await searchProvider();
        $.sendResult();
    } catch (error) {
        // Send error
        $.sendError(error);
    }
}

// Run main function
main();

Code Breakdown

Variables and Imports

• importer: imports modules from the ../Core directory
• searchProvider and lzw: imported modules from importer
• PROFILE_PATH: environment variable for user's home directory ( Falls back to HOMEPATH or USERPROFILE if HOME is not set)
• project: directory path for the universal project ( PROFILE_PATH + '/universal' )
• rateLimit: integer rate limit for output (900000)
• fs: file system module (not imported explicitly, but used)

Functions

• outputSlowly: function to output script pieces slowly (every 1100ms)
  • Returns a promise that resolves when all script pieces have been output
  • Outputs each script piece to the console and appends it to the HTML document
• compress: function to compress the Angular app code
  • Returns an object with compressed code and scripts

Main Execution

• displAngular: function to fetch the Angular app code
  • Promises an object with HTML, code, and chunks
• compress: function to compress the code
  • Called twice, once before outputting script pieces and once after
• outputSlowly: function to output script pieces slowly
  • Outputs each script piece to the console and appends it to the HTML document
• searchProvider: function to initialize the search provider
• $.sendResult and $.sendError: functions to send the result or error to the UI component

Error Handling

• Catch block catches any errors and sends the error to the UI component using $.sendError