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/**
* @fileoverview Utility functions for React pragma configuration
* @author Yannick Croissant
*/
'use strict';
const JSX_ANNOTATION_REGEX = /@jsx\s+([^\s]+)/;
// Does not check for reserved keywords or unicode characters
const JS_IDENTIFIER_REGEX = /^[_$a-zA-Z][_$a-zA-Z0-9]*$/;
function getCreateClassFromContext(context) {
let pragma = 'createReactClass';
// .eslintrc shared settings (http://eslint.org/docs/user-guide/configuring#adding-shared-settings)
if (context.settings.react && context.settings.react.createClass) {
pragma = context.settings.react.createClass;
}
if (!JS_IDENTIFIER_REGEX.test(pragma)) {
throw new Error(`createClass pragma ${pragma} is not a valid function name`);
}
return pragma;
}
function getFragmentFromContext(context) {
let pragma = 'Fragment';
// .eslintrc shared settings (http://eslint.org/docs/user-guide/configuring#adding-shared-settings)
if (context.settings.react && context.settings.react.fragment) {
pragma = context.settings.react.fragment;
}
if (!JS_IDENTIFIER_REGEX.test(pragma)) {
throw new Error(`Fragment pragma ${pragma} is not a valid identifier`);
}
return pragma;
}
function getFromContext(context) {
let pragma = 'React';
const sourceCode = context.getSourceCode();
const pragmaNode = sourceCode.getAllComments().find((node) => JSX_ANNOTATION_REGEX.test(node.value));
if (pragmaNode) {
const matches = JSX_ANNOTATION_REGEX.exec(pragmaNode.value);
pragma = matches[1].split('.')[0];
// .eslintrc shared settings (http://eslint.org/docs/user-guide/configuring#adding-shared-settings)
} else if (context.settings.react && context.settings.react.pragma) {
pragma = context.settings.react.pragma;
}
if (!JS_IDENTIFIER_REGEX.test(pragma)) {
throw new Error(`React pragma ${pragma} is not a valid identifier`);
}
return pragma;
}
module.exports = {
getCreateClassFromContext,
getFragmentFromContext,
getFromContext,
};
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