cdk-s3-vectors/node_modules/fast-xml-parser/src/xmlparser/node2json.js

A CDK construct library for Amazon S3 Vectors. This construct simplifies the creation of vector buckets, vector indexes with full configuration options, and Amazon Bedrock knowledge bases using S3 Vectors as the underlying vector store.

'use strict';

import XmlNode from './xmlNode.js';

const METADATA_SYMBOL = XmlNode.getMetaDataSymbol();

/**
 * 
 * @param {array} node 
 * @param {any} options 
 * @returns 
 */
export default function prettify(node, options){
  return compress( node, options);
}

/**
 * 
 * @param {array} arr 
 * @param {object} options 
 * @param {string} jPath 
 * @returns object
 */
function compress(arr, options, jPath){
  let text;
  const compressedObj = {};
  for (let i = 0; i < arr.length; i++) {
    const tagObj = arr[i];
    const property = propName(tagObj);
    let newJpath = "";
    if(jPath === undefined) newJpath = property;
    else newJpath = jPath + "." + property;

    if(property === options.textNodeName){
      if(text === undefined) text = tagObj[property];
      else text += "" + tagObj[property];
    }else if(property === undefined){
      continue;
    }else if(tagObj[property]){
      
      let val = compress(tagObj[property], options, newJpath);
      const isLeaf = isLeafTag(val, options);
      if (tagObj[METADATA_SYMBOL] !== undefined) {
        val[METADATA_SYMBOL] = tagObj[METADATA_SYMBOL]; // copy over metadata
      }

      if(tagObj[":@"]){
        assignAttributes( val, tagObj[":@"], newJpath, options);
      }else if(Object.keys(val).length === 1 && val[options.textNodeName] !== undefined && !options.alwaysCreateTextNode){
        val = val[options.textNodeName];
      }else if(Object.keys(val).length === 0){
        if(options.alwaysCreateTextNode) val[options.textNodeName] = "";
        else val = "";
      }

      if(compressedObj[property] !== undefined && compressedObj.hasOwnProperty(property)) {
        if(!Array.isArray(compressedObj[property])) {
            compressedObj[property] = [ compressedObj[property] ];
        }
        compressedObj[property].push(val);
      }else{
        //TODO: if a node is not an array, then check if it should be an array
        //also determine if it is a leaf node
        if (options.isArray(property, newJpath, isLeaf )) {
          compressedObj[property] = [val];
        }else{
          compressedObj[property] = val;
        }
      }
    }
    
  }
  // if(text && text.length > 0) compressedObj[options.textNodeName] = text;
  if(typeof text === "string"){
    if(text.length > 0) compressedObj[options.textNodeName] = text;
  }else if(text !== undefined) compressedObj[options.textNodeName] = text;
  return compressedObj;
}

function propName(obj){
  const keys = Object.keys(obj);
  for (let i = 0; i < keys.length; i++) {
    const key = keys[i];
    if(key !== ":@") return key;
  }
}

function assignAttributes(obj, attrMap, jpath, options){
  if (attrMap) {
    const keys = Object.keys(attrMap);
    const len = keys.length; //don't make it inline
    for (let i = 0; i < len; i++) {
      const atrrName = keys[i];
      if (options.isArray(atrrName, jpath + "." + atrrName, true, true)) {
        obj[atrrName] = [ attrMap[atrrName] ];
      } else {
        obj[atrrName] = attrMap[atrrName];
      }
    }
  }
}

function isLeafTag(obj, options){
  const { textNodeName } = options;
  const propCount = Object.keys(obj).length;
  
  if (propCount === 0) {
    return true;
  }

  if (
    propCount === 1 &&
    (obj[textNodeName] || typeof obj[textNodeName] === "boolean" || obj[textNodeName] === 0)
  ) {
    return true;
  }

  return false;
}