@alu0101209067/addlogging
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Páctice 3 npm module addlogging
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<title>JSDoc: Source: my-sol-logging-espree.js</title>
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<h1 class="page-title">Source: my-sol-logging-espree.js</h1>
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<pre class="prettyprint source linenums"><code>#!/usr/bin/env node
const esprima = require('espree');
const estraverse = require('estraverse');
let escodegen = require('escodegen');
/**
* Function that recive a code like a string and then create a code
* @param {string} code
* @returns {string}
*/
module.exports.addLogging = function(code, pattern = '') {
let ast = esprima.parse(code, {ecmaVersion: 6, loc : true});
estraverse.traverse(ast, {
enter: function(node, parent) {
if (node.type === 'FunctionDeclaration' ||
node.type === 'FunctionExpression' ||
node.type === 'ArrowFunctionExpression') {
if (!pattern
|| (node.id === null && parent.id.name.match(pattern))
|| node.id
&& node.id.name.match(pattern))
{
addBeforeCode(node);
}
}
}
});
return escodegen.generate(ast);
}
/**
* Function that recive a node add one line of code before code
* @param {} node
* @returns {void}
*/
function addBeforeCode(node) {
let name = node.id ? node.id.name : '<anonymous function>';
const params = node.params.map(param =>`\$\{${param.name}\}`);
let beforeCode = `console.log(\`Entering ${name}(${params}) at line ${node.loc.start.line}\`);`;
let beforeNodes = esprima.parse(beforeCode, {ecmaVersion: 6}).body; // Is an Array of ASTs
node.body.body = beforeNodes.concat(node.body.body);
}</code></pre>
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<h2><a href="index.html">Home</a></h2><h3>Global</h3><ul><li><a href="global.html#addBeforeCode">addBeforeCode</a></li><li><a href="global.html#addLogging">addLogging</a></li></ul>
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Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 3.6.6</a> on Tue Mar 09 2021 23:00:46 GMT+0000 (Coordinated Universal Time)
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