tools.js

function ascii (a) { return a.charCodeAt(0); }

function codeToAscii(number){
    return String.fromCharCode(number);
}

module.exports = {

CeasarCipher: function(text, shift,method){
var citext = "";
  if(method === "Encode"){
   for (let i = 0; i < text.length; i++){
      if(text[i] === " "){
        citext += " ";
        //i++;
      }
      else{
       citext += codeToAscii(ascii(text[i]) + shift);
       // console.log(codeToAscii((ascii(text[i]))));
     }
   }
return citext;
} else{
for (let i = 0; i < text.length; i++){
   if(text[i] === " "){
     citext += " ";
     //i++;
   }
   else{
    citext += codeToAscii(ascii(text[i]) - shift);
    console.log(codeToAscii((ascii(text[i]))));
  }
}
return citext;
}
}


VigenereCipher : function(text,key,method){

text = text.toLowerCase();
var citext = "";
var newKey = "";

let z =0;
let hold =0;

for (let i =0; i < text.length + hold; i++){

   if (z === key.length ){
     z = 0;
     hold++;
 } else {

    newKey += key[z];
    z++;
  }
}

//console.log(newKey);

if (method === "Encode"){
    for (let i =0; i < text.length; i++){
      if(text[i] === " "){
        citext += " ";
        //i++;
      }

      else{
       citext += codeToAscii(((ascii(text[i]) - 64  + ascii(newKey[i])) % 26) + 97);
      // console.log(((ascii(text[i]) - 64  + ascii(newKey[i])) % 26) + 97);
     }
    }
    return citext;
  }else{
    for (let i =0; i < text.length; i++){
      if(text[i] === " "){
        citext += " ";
        //i++;
      }
      else{
       citext += codeToAscii(((ascii(text[i])  - ascii(newKey[i]) + 26) % 26) + 97);
      // console.log(codeToAscii((ascii(text[i]))));
     }
    }
   return citext;
  }

//console.log(citext);
}


}