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Viewing file:     XMLParser.js (2.07 KB)      -rw-r--r--

const { buildOptions} = require("./OptionsBuilder");
const OrderedObjParser = require("./OrderedObjParser");
const { prettify} = require("./node2json");
const validator = require('../validator');

class XMLParser{
    
    constructor(options){
        this.externalEntities = {};
        this.options = buildOptions(options);
        
    }
    /**
     * Parse XML dats to JS object 
     * @param {string|Buffer} xmlData 
     * @param {boolean|Object} validationOption 
     */
    parse(xmlData,validationOption){
        if(typeof xmlData === "string"){
        }else if( xmlData.toString){
            xmlData = xmlData.toString();
        }else{
            throw new Error("XML data is accepted in String or Bytes[] form.")
        }
        if( validationOption){
            if(validationOption === true) validationOption = {}; //validate with default options
            
            const result = validator.validate(xmlData, validationOption);
            if (result !== true) {
              throw Error( `${result.err.msg}:${result.err.line}:${result.err.col}` )
            }
          }
        const orderedObjParser = new OrderedObjParser(this.options);
        orderedObjParser.addExternalEntities(this.externalEntities);
        const orderedResult = orderedObjParser.parseXml(xmlData);
        if(this.options.preserveOrder || orderedResult === undefined) return orderedResult;
        else return prettify(orderedResult, this.options);
    }

    /**
     * Add Entity which is not by default supported by this library
     * @param {string} key 
     * @param {string} value 
     */
    addEntity(key, value){
        if(value.indexOf("&") !== -1){
            throw new Error("Entity value can't have '&'")
        }else if(key.indexOf("&") !== -1 || key.indexOf(";") !== -1){
            throw new Error("An entity must be set without '&' and ';'. Eg. use '#xD' for '
'")
        }else if(value === "&"){
            throw new Error("An entity with value '&' is not permitted");
        }else{
            this.externalEntities[key] = value;
        }
    }
}

module.exports = XMLParser;