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"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = getAccessibleChildText;
var _jsxAstUtils = require("jsx-ast-utils");
var _isHiddenFromScreenReader = _interopRequireDefault(require("./isHiddenFromScreenReader"));
/**
* Returns a new "standardized" string: all whitespace is collapsed to one space,
* and the string is lowercase
* @param {string} input
* @returns lowercase, single-spaced, punctuation-stripped, trimmed string
*/
function standardizeSpaceAndCase(input) {
return input.trim().replace(/[,.?¿!‽¡;:]/g, '') // strip punctuation
.replace(/\s\s+/g, ' ') // collapse spaces
.toLowerCase();
}
/**
* Returns the (recursively-defined) accessible child text of a node, which (in-order) is:
* 1. The element's aria-label
* 2. If the element is a direct literal, the literal value
* 3. Otherwise, merge all of its children
* @param {JSXElement} node - node to traverse
* @returns child text as a string
*/
function getAccessibleChildText(node, elementType) {
var ariaLabel = (0, _jsxAstUtils.getLiteralPropValue)((0, _jsxAstUtils.getProp)(node.openingElement.attributes, 'aria-label'));
// early escape-hatch when aria-label is applied
if (ariaLabel) return standardizeSpaceAndCase(ariaLabel);
// early-return if alt prop exists and is an image
var altTag = (0, _jsxAstUtils.getLiteralPropValue)((0, _jsxAstUtils.getProp)(node.openingElement.attributes, 'alt'));
if (elementType(node.openingElement) === 'img' && altTag) return standardizeSpaceAndCase(altTag);
// skip if aria-hidden is true
if ((0, _isHiddenFromScreenReader["default"])(elementType(node.openingElement), node.openingElement.attributes)) {
return '';
}
var rawChildText = node.children.map(function (currentNode) {
// $FlowFixMe JSXText is missing in ast-types-flow
if (currentNode.type === 'Literal' || currentNode.type === 'JSXText') {
return String(currentNode.value);
}
if (currentNode.type === 'JSXElement') {
return getAccessibleChildText(currentNode, elementType);
}
return '';
}).join(' ');
return standardizeSpaceAndCase(rawChildText);
}
module.exports = exports.default;