renderer.js

//Function that handles the reading of files and merge in values
  // red from file and get a string
  // merge values in to string
const fs = require('fs');

function mergeValues(values, content) {
  //Cycle over the keys
  for (var key in values) {
    //Replace all {{key}} with the value from the values object
    content = content.replace("{{" + key + "}}", values[key]);
  }
    //return merged content
    return content;
}
  function view(templateName, values, response) {
    //Read from the template files
    var fileContents = fs.readFileSync('./views/' + templateName + '.html', {encoding: "utf8"});
      // Insert values in to the Content
      fileContents = mergeValues(values, fileContents);
      //Write out to the response
      response.write(fileContents);
  }

module.exports.view = view;