Current File : /var/www/html/node_modules/eslint-plugin-react/lib/util/props.js
/**
* @fileoverview Utility functions for props
*/
'use strict';
const astUtil = require('./ast');
/**
* Checks if the Identifier node passed in looks like a propTypes declaration.
* @param {ASTNode} node The node to check. Must be an Identifier node.
* @returns {Boolean} `true` if the node is a propTypes declaration, `false` if not
*/
function isPropTypesDeclaration(node) {
if (node && (node.type === 'ClassProperty' || node.type === 'PropertyDefinition')) {
// Flow support
if (node.typeAnnotation && node.key.name === 'props') {
return true;
}
}
return astUtil.getPropertyName(node) === 'propTypes';
}
/**
* Checks if the node passed in looks like a contextTypes declaration.
* @param {ASTNode} node The node to check.
* @returns {Boolean} `true` if the node is a contextTypes declaration, `false` if not
*/
function isContextTypesDeclaration(node) {
if (node && (node.type === 'ClassProperty' || node.type === 'PropertyDefinition')) {
// Flow support
if (node.typeAnnotation && node.key.name === 'context') {
return true;
}
}
return astUtil.getPropertyName(node) === 'contextTypes';
}
/**
* Checks if the node passed in looks like a contextType declaration.
* @param {ASTNode} node The node to check.
* @returns {Boolean} `true` if the node is a contextType declaration, `false` if not
*/
function isContextTypeDeclaration(node) {
return astUtil.getPropertyName(node) === 'contextType';
}
/**
* Checks if the node passed in looks like a childContextTypes declaration.
* @param {ASTNode} node The node to check.
* @returns {Boolean} `true` if the node is a childContextTypes declaration, `false` if not
*/
function isChildContextTypesDeclaration(node) {
return astUtil.getPropertyName(node) === 'childContextTypes';
}
/**
* Checks if the Identifier node passed in looks like a defaultProps declaration.
* @param {ASTNode} node The node to check. Must be an Identifier node.
* @returns {Boolean} `true` if the node is a defaultProps declaration, `false` if not
*/
function isDefaultPropsDeclaration(node) {
const propName = astUtil.getPropertyName(node);
return (propName === 'defaultProps' || propName === 'getDefaultProps');
}
/**
* Checks if we are declaring a display name
* @param {ASTNode} node The AST node being checked.
* @returns {Boolean} True if we are declaring a display name, false if not.
*/
function isDisplayNameDeclaration(node) {
switch (node.type) {
case 'ClassProperty':
case 'PropertyDefinition':
return node.key && node.key.name === 'displayName';
case 'Identifier':
return node.name === 'displayName';
case 'Literal':
return node.value === 'displayName';
default:
return false;
}
}
/**
* Checks if the PropTypes MemberExpression node passed in declares a required propType.
* @param {ASTNode} propTypeExpression node to check. Must be a `PropTypes` MemberExpression.
* @returns {Boolean} `true` if this PropType is required, `false` if not.
*/
function isRequiredPropType(propTypeExpression) {
return propTypeExpression.type === 'MemberExpression' && propTypeExpression.property.name === 'isRequired';
}
module.exports = {
isPropTypesDeclaration,
isContextTypesDeclaration,
isContextTypeDeclaration,
isChildContextTypesDeclaration,
isDefaultPropsDeclaration,
isDisplayNameDeclaration,
isRequiredPropType,
};
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