scrabble-scorer.js

// This assignment is inspired by a problem on Exercism (https://exercism.org/tracks/javascript/exercises/etl) that demonstrates Extract-Transform-Load using Scrabble's scoring system. 

const input = require("readline-sync");

const oldPointStructure = {
  1: ['A', 'E', 'I', 'O', 'U', 'L', 'N', 'R', 'S', 'T'],
  2: ['D', 'G'],
  3: ['B', 'C', 'M', 'P'],
  4: ['F', 'H', 'V', 'W', 'Y'],
  5: ['K'],
  8: ['J', 'X'],
  10: ['Q', 'Z']
};

function oldScrabbleScorer(word) {
	word = word.toUpperCase();
	let letterPoints = "";
  let totalScore = 0;
 
	for (let i = 0; i < word.length; i++) {
 
	  for (const pointValue in oldPointStructure) {
 
		 if (oldPointStructure[pointValue].includes(word[i])) {
			letterPoints += `Points for '${word[i]}': ${pointValue}\n`;
      totalScore += Number(pointValue);
		 }
 
	  }
	}
    return totalScore;
	//return letterPoints;
 }

// your job is to finish writing these functions and variables that we've named //
// don't change the names or your program won't work as expected. //

function initialPrompt() {
   let userWord = input.question(`Let's play some scrabble! 

Enter a word to score: `);
let regex = /^[a-zA-Z ]+$/;
while (!regex.test(userWord)){
    userWord = input.question('Numbers and special characters not allowed. Please enter a word: ')
}
   
   return userWord;
};

let newPointStructure = transform(oldPointStructure);
newPointStructure[" "] = 0;


let simpleScorer = function(word){
  word = word.toUpperCase();
	let letterPoints = "";
  let totalScore = 0;
 
	for (let i = 0; i < word.length; i++) {
      totalScore += 1;
	}
      return totalScore;
};

let vowelBonusScorer = function(word){
  word = word.toUpperCase();
	let letterPoints = "";
  let totalScore = 0;
 
	for (let i = 0; i < word.length; i++) {
      if (word[i] === 'A' || word[i] === 'E' || word[i] === 'I' || word[i] === 'O' || word[i] === 'U'){
			    letterPoints += `Points for '${word[i]}': 3 \n`;
          totalScore += 3;
      }
      else{
       
        totalScore += 1;
      }
	}
    return totalScore;
  

};

let scrabbleScorer = function(word){  
  word = word.toUpperCase();
  let totalScore = 0;
  for (let i = 0; i < word.length; i++) {
    for (const letter in newPointStructure){
      
      if(word[i] === letter.toUpperCase()){
      
        totalScore += newPointStructure[letter];
      }
    }

}
return totalScore;
};

const objectSimpleScore = {
  name: "Simple Score",
  description: "Each letter is worth 1 point.",
  scorerFunction: simpleScorer
};
const objectBonusVowel = {
  name: "Bonus Vowels",
  description: "Vowels are 3 pts, consonants are 1 pt.",
  scorerFunction: vowelBonusScorer

};
const objectOldScorer = {
  name: "Scrabble",
  description: "The traditional scoring algorithm.",
  scorerFunction: oldScrabbleScorer

};
const objectNewScorer = {
  name: "Scrabble",
  description: "The traditional scoring algorithm but better.",
  scorerFunction: scrabbleScorer

};

const scoringAlgorithms = [objectSimpleScore, objectBonusVowel, objectNewScorer];

function scorerPrompt() {
  console.log(`Which scoring algorithm would you like to use?: \n`)

  for (i=0; i<3; i++){
      console.log(`${i} - ${scoringAlgorithms[i]["name"]} : ${scoringAlgorithms[i]["description"]} `);
  }
  
   let chosenScorer = Number(input.question(`Enter 0, 1 or 2:   `));
   
        while(!(chosenScorer === 0 || chosenScorer === 1 || chosenScorer === 2)){
          chosenScorer = Number(input.question(`Please enter either 0, 1 or 2:   `));
        }
   return scoringAlgorithms[chosenScorer];

  }
  


function transform(oldPointStructure) {
  let newPointObject = {};
      for(const item in oldPointStructure){
        for (let i = 0; i < oldPointStructure[item].length ; i++){
            newPointObject[oldPointStructure[item][i].toLowerCase()] = Number(item);
        }
      }
   return newPointObject;
};

function runProgram() {

  let userWord = initialPrompt();
  console.log(`Score for '${userWord}': ${scorerPrompt().scorerFunction(userWord)}`);

}

// Don't write any code below this line //
// And don't change these or your program will not run as expected //
module.exports = {
   initialPrompt: initialPrompt,
   transform: transform,
   oldPointStructure: oldPointStructure,
   simpleScorer: simpleScorer,
   vowelBonusScorer: vowelBonusScorer,
   scrabbleScorer: scrabbleScorer,
   scoringAlgorithms: scoringAlgorithms,
   newPointStructure: newPointStructure,
	runProgram: runProgram,
	scorerPrompt: scorerPrompt
};