repo_description: React-specific linting rules for ESLint
repo_topics: development ecmascript eslint javascript lint react
code: /**
   * @fileoverview Enforce ES5 or ES6 class for React Components
   * @author Dan Hamilton
   */
  
  'use strict';
  
  const componentUtil = require('../util/componentUtil');
  const docsUrl = require('../util/docsUrl');
  const report = require('../util/report');
  
  // ------------------------------------------------------------------------------
  // Rule Definition
  // ------------------------------------------------------------------------------
  
  const messages = {
    shouldUseES6Class: 'Component should use es6 class instead of createClass',
    shouldUseCreateClass: 'Component should use createClass instead of es6 class',
  };
  
  /** @type {import('eslint').Rule.RuleModule} */
  module.exports = {
    meta: {
      docs: {
        description: 'Enforce ES5 or ES6 class for React Components',
        category: 'Stylistic Issues',
        recommended: false,
        url: docsUrl('prefer-es6-class'),
      },
  
      messages,
  
      schema: [{
        enum: ['always', 'never'],
      }],
    },
  
    create(context) {
      const configuration = context.options[0] || 'always';
  
      return {
        ObjectExpression(node) {
          if (componentUtil.isES5Component(node, context) && configuration === 'always') {
            report(context, messages.shouldUseES6Class, 'shouldUseES6Class', {
              node,
            });
          }
        },
        ClassDeclaration(node) {
          if (componentUtil.isES6Component(node, context) && configuration === 'never') {
            report(context, messages.shouldUseCreateClass, 'shouldUseCreateClass', {
              node,
            });
          }
        },
      };
    },
  };
  