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58 lines
1.4 KiB
58 lines
1.4 KiB
'use strict';
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const fill = require('fill-range');
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const utils = require('./utils');
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const compile = (ast, options = {}) => {
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let walk = (node, parent = {}) => {
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let invalidBlock = utils.isInvalidBrace(parent);
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let invalidNode = node.invalid === true && options.escapeInvalid === true;
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let invalid = invalidBlock === true || invalidNode === true;
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let prefix = options.escapeInvalid === true ? '\\' : '';
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let output = '';
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if (node.isOpen === true) {
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return prefix + node.value;
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}
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if (node.isClose === true) {
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return prefix + node.value;
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}
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if (node.type === 'open') {
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return invalid ? (prefix + node.value) : '(';
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}
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if (node.type === 'close') {
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return invalid ? (prefix + node.value) : ')';
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}
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if (node.type === 'comma') {
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return node.prev.type === 'comma' ? '' : (invalid ? node.value : '|');
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}
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if (node.value) {
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return node.value;
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}
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if (node.nodes && node.ranges > 0) {
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let args = utils.reduce(node.nodes);
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let range = fill(...args, { ...options, wrap: false, toRegex: true });
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if (range.length !== 0) {
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return args.length > 1 && range.length > 1 ? `(${range})` : range;
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}
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}
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if (node.nodes) {
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for (let child of node.nodes) {
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output += walk(child, node);
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}
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}
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return output;
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};
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return walk(ast);
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};
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module.exports = compile;
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