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