DevOps Engineer - Rotunda Software - Julieta Ansola

urlParser.js

function extractVariables(urlFormat, urlInstance) {
  // Input validation for string types
  if (typeof urlFormat !== 'string' || typeof urlInstance !== 'string') {
    throw new Error('Both URLs must be strings.');
  }

  // Split URLs into parts
  const formatParts = urlFormat.split('/');
  const instanceParts = urlInstance.split('/');

  // Check if the number of parts in format and instance match
  if (formatParts.length !== instanceParts.length) {
    throw new Error('URLs do not match.');
  }

  // Result object to store variable parts and their values
  const result = {};

  // Iterate through each part of the URLs
  for (let i = 0, len = formatParts.length; i < len; i++) {
    const formatPart = formatParts[i];
    const instancePart = instanceParts[i];

    // Check if the current part in the URL format is a variable part
    if (formatPart[0] === ':') {
      // This is a variable part, extract the name and value
      const variableName = formatPart.slice(1);

      // Check if the variable name is not empty
      if (variableName) {
        result[variableName] = instancePart;
      } else {
        // Throw an error for an invalid variable name
        throw new Error('Invalid variable name in URL format.');
      }
    } else if (formatPart !== instancePart) {
      // Throw an error if format and instance parts do not match
      throw new Error('URLs do not match.');
    }
  }

  // Handle query parameters
  const queryStringStartIndex = urlInstance.indexOf('?');
  if (queryStringStartIndex !== -1) {
    // Extract and parse query parameters
    const queryParams = urlInstance.slice(queryStringStartIndex + 1).split('&');
    for (const param of queryParams) {
      const [key, value] = param.split('=');
      // Check if key and value are valid and add to the result object
      if (key && value) {
        result[key] = value;
      }
    }
  }

  
  return result
  }





try {
  const urlFormat = '/:version/api/:collection/:id';
  const urlInstance = '/6/api/listings/3?sort=desc&limit=10';

 
  const result = extractVariables(urlFormat, urlInstance);
  console.log(result);
} catch (error) {

  console.error(error.message);
}