The code imports specific functions from a ../Core module and defines a string of JavaScript code, which is then used to replace imports using the imported replaceCore function. The replaced code is sent as a MIME message with a text/plain type, if the $ object is defined and has the required properties.

Cell 6

var importer = require('../Core')
var {
    replaceImports, replaceCore
} = importer.import("replace notebook import",
"replace core requirement")
var {selectAst} = importer.import("select code tree")
var {htmlToTree} = importer.import("html to tree")

var code = `
var importer = require('../Core');
var getArrayAST = importer.import("get ast path array");
`

if(typeof $ != 'undefined') {
    $.mime({'text/plain': replaceCore(code).ownerDocument.toString()})
    
    /*
    expected output 
var getArrayAST = importer.import("get ast path array");
*/
    
}

// Import necessary modules from the Core module
const { importer } = require('../Core');
const {
  replaceImports,
  replaceCore,
  selectAst,
  htmlToTree,
  importModule,
} = importer.import([
 'replace notebook import',
 'replace core requirement',
 'select code tree',
  'html to tree',
  // Import the importModule function to replace importer.import
]);

/**
 * Replaces imports and core requirements in a given code string.
 * @param {string} code - The code string to process.
 * @returns {object} An object containing the modified code and other information.
 */
async function processCode(code) {
  try {
    // Replace imports and core requirements in the code
    const modifiedCode = await replaceCore(code);
    // Convert the modified code to an abstract syntax tree (AST)
    const ast = selectAst(modifiedCode);
    // Convert the HTML to a tree structure
    const htmlTree = htmlToTree(ast);

    // Check if the $ object is defined
    if (typeof $!== 'undefined') {
      // Set the MIME type to 'text/plain' and send the modified code as a string
      $.mime({
        'text/plain': await replaceImports(modifiedCode.toString()),
      });
    }

    // Return the modified code
    return modifiedCode;
  } catch (error) {
    // Log any errors that occur during processing
    globalThis.console.error(error);
  }
}

// Example usage:
const code = `
var importer = require('../Core');
var getArrayAST = importer.import('get ast path array');
`;

processCode(code);

Code Breakdown

Importing Modules

The code imports modules from a file named ../Core using the require function:

var importer = require('../Core')

It then uses the importer object to import specific functions from the ../Core module:

var {
    replaceImports, replaceCore
} = importer.import(['replace notebook import','replace core requirement'])
var {selectAst} = importer.import('select code tree')
var {htmlToTree} = importer.import('html to tree')

These functions are imported with their respective names, which are used later in the code.

Defining Code

A string of JavaScript code is defined:

var code = `
var importer = require('../Core');
var getArrayAST = importer.import('get ast path array');
`

This code is used later in the script.

Replacing Imports

The code checks if the $ object is defined, and if so, it uses the replaceCore function to replace imports in the code string:

if(typeof $!= 'undefined') {
    $.mime({'text/plain': replaceCore(code).ownerDocument.toString()})
}

The replaceCore function is used to replace imports, and the result is converted to a string using toString() before being sent as the content of a MIME message with a text/plain type.