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✏️ Editing: XMLParser.js Writable

const { buildOptions} = require("./OptionsBuilder");
const Xml2JsParser = require("./Xml2JsParser");

class XMLParser{
    
    constructor(options){
        this.externalEntities = {};
        this.options = buildOptions(options);
        // console.log(this.options)
    }
    /**
     * Parse XML data string to JS object 
     * @param {string|Buffer} xmlData 
     * @param {boolean|Object} validationOption 
     */
    parse(xmlData){
        if(Array.isArray(xmlData) && xmlData.byteLength !== undefined){
            return this.parse(xmlData);
        }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 parser = new Xml2JsParser(this.options);
        parser.entityParser.addExternalEntities(this.externalEntities);
        return parser.parse(xmlData);
    }
    /**
     * Parse XML data buffer to JS object 
     * @param {string|Buffer} xmlData 
     * @param {boolean|Object} validationOption 
     */
    parseBytesArr(xmlData){
        if(Array.isArray(xmlData) && xmlData.byteLength !== undefined){
        }else{
            throw new Error("XML data is accepted in Bytes[] form.")
        }
        const parser = new Xml2JsParser(this.options);
        parser.entityParser.addExternalEntities(this.externalEntities);
        return parser.parseBytesArr(xmlData);
    }
    /**
     * Parse XML data stream to JS object 
     * @param {fs.ReadableStream} xmlDataStream 
     */
    parseStream(xmlDataStream){
        if(!isStream(xmlDataStream)) throw new Error("FXP: Invalid stream input");
        
        const orderedObjParser = new Xml2JsParser(this.options);
        orderedObjParser.entityParser.addExternalEntities(this.externalEntities);
        return orderedObjParser.parseStream(xmlDataStream);
    }

/**
     * 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 '&#xD;'")
        }else if(value === "&"){
            throw new Error("An entity with value '&' is not permitted");
        }else{
            this.externalEntities[key] = value;
        }
    }
}

function isStream(stream){
    if(stream && typeof stream.read === "function" && typeof stream.on === "function" && typeof stream.readableEnded === "boolean") return true;
    return false;
}

module.exports = XMLParser;

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