Codecademy export

main.js

// All valid credit card numbers
const valid1 = [4, 5, 3, 9, 6, 7, 7, 9, 0, 8, 0, 1, 6, 8, 0, 8];
const valid2 = [5, 5, 3, 5, 7, 6, 6, 7, 6, 8, 7, 5, 1, 4, 3, 9];
const valid3 = [3, 7, 1, 6, 1, 2, 0, 1, 9, 9, 8, 5, 2, 3, 6];
const valid4 = [6, 0, 1, 1, 1, 4, 4, 3, 4, 0, 6, 8, 2, 9, 0, 5];
const valid5 = [4, 5, 3, 9, 4, 0, 4, 9, 6, 7, 8, 6, 9, 6, 6, 6];

// All invalid credit card numbers
const invalid1 = [4, 5, 3, 2, 7, 7, 8, 7, 7, 1, 0, 9, 1, 7, 9, 5];
const invalid2 = [5, 7, 9, 5, 5, 9, 3, 3, 9, 2, 1, 3, 4, 6, 4, 3];
const invalid3 = [3, 7, 5, 7, 9, 6, 0, 8, 4, 4, 5, 9, 9, 1, 4];
const invalid4 = [6, 0, 1, 1, 1, 2, 7, 9, 6, 1, 7, 7, 7, 9, 3, 5];
const invalid5 = [5, 3, 8, 2, 0, 1, 9, 7, 7, 2, 8, 8, 3, 8, 5, 4];

// Can be either valid or invalid
const mystery1 = [3, 4, 4, 8, 0, 1, 9, 6, 8, 3, 0, 5, 4, 1, 4];
const mystery2 = [5, 4, 6, 6, 1, 0, 0, 8, 6, 1, 6, 2, 0, 2, 3, 9];
const mystery3 = [6, 0, 1, 1, 3, 7, 7, 0, 2, 0, 9, 6, 2, 6, 5, 6, 2, 0, 3];
const mystery4 = [4, 9, 2, 9, 8, 7, 7, 1, 6, 9, 2, 1, 7, 0, 9, 3];
const mystery5 = [4, 9, 1, 3, 5, 4, 0, 4, 6, 3, 0, 7, 2, 5, 2, 3];

// An array of all the arrays above
const batch = [valid1, valid2, valid3, valid4, valid5, invalid1, invalid2, invalid3, invalid4, invalid5, mystery1, mystery2, mystery3, mystery4, mystery5];

let invalidCopy = [];
const validateCred = array => {
  let reverse = array.reverse();
  let total = reverse[0];
  // array.reverse();
  // console.log("array length is " + reverse.length)
  // console.log("reverse array is " + reverse)
  // console.log("original array is " + array)
  
  for(let i=1; i<=reverse.length -1 ; i++){
    if(i%2==0){
      // console.log("this is even, array value is " + array[i]);
      total = total + array[i];
      // console.log("current total value after even is " + total);
    }
     if(i%2==1){
      // console.log("this is odd, array value is " + array[i]);
      let oddplace = array[i]*2;
      if(oddplace > 9){
        oddplace -= 9;
      }
      total += oddplace;      
      // console.log("current total value after odd is " + total);
    }
  }
  
  // console.log("final value is " + total);
  if(total%10 == 0){
    // console.log("final value is " + total + " and is valid");
    return true;
  }
  // console.log("final value is " + total + " and is NOT valid");
  return false;

};

// validateCred(valid1);

const findInvalidCards = array => {
  let invalid = [];
  for(let i = 0; i < array.length; i++){
    if (validateCred(array[i]) === false ){
      // console.log("within if " + invalid)
    invalid.push(array[i].reverse());
    }
  }
  invalidCopy = invalid;
  console.log("below is invalid array")
  // console.log(invalid)
  return invalid;
}

findInvalidCards(batch);

const idInvalidCardCompanies = array => {
  let invalidComp = [];
  for(let i=0; i<array.length; i++){
    if(array[i][0] !== 3 && array[i][0] !== 4 && array[i][0] !== 5 && array[i][0] !== 6 ){
      console.log("company not found")
    }
    else{
      if(array[i][0] == 3){
        if(invalidComp.indexOf("Amex (American Express)") === -1 ){
          invalidComp.push("Amex (American Express)") 
        }
      }
      else if(array[i][0] == 4){
        if(invalidComp.indexOf("Amex (American Express)") === -1 ){
          invalidComp.push("Visa")
        }
      }
      else if(array[i][0] == 5){
        if(invalidComp.indexOf("Amex (American Express)") === -1 ){
          invalidComp.push("Mastercard")
        }
      }
      else if(array[i][0] == 6){
        if(invalidComp.indexOf("Amex (American Express)") === -1 ){
          invalidComp.push("Discover")
        }
      }
    }
  }
  console.log(invalidComp);
  return invalidComp;
}

idInvalidCardCompanies(invalidCopy);