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					58 lines
				
				1.4 KiB
			
		
		
			
		
	
	
					58 lines
				
				1.4 KiB
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											3 years ago
										 
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								'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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