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"use strict";
function last(array) {
return array[array.length - 1];
}
var brackets = {
/**
* Parse string to nodes tree
*/
parse: function parse(str) {
var current = [''];
var stack = [current];
for (var _iterator = str, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
var _ref;
if (_isArray) {
if (_i >= _iterator.length) break;
_ref = _iterator[_i++];
} else {
_i = _iterator.next();
if (_i.done) break;
_ref = _i.value;
}
var sym = _ref;
if (sym === '(') {
current = [''];
last(stack).push(current);
stack.push(current);
continue;
}
if (sym === ')') {
stack.pop();
current = last(stack);
current.push('');
continue;
}
current[current.length - 1] += sym;
}
return stack[0];
},
/**
* Generate output string by nodes tree
*/
stringify: function stringify(ast) {
var result = '';
for (var _iterator2 = ast, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
var _ref2;
if (_isArray2) {
if (_i2 >= _iterator2.length) break;
_ref2 = _iterator2[_i2++];
} else {
_i2 = _iterator2.next();
if (_i2.done) break;
_ref2 = _i2.value;
}
var i = _ref2;
if (typeof i === 'object') {
result += "(" + brackets.stringify(i) + ")";
continue;
}
result += i;
}
return result;
}
};
module.exports = brackets;
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