01. Email Validator (Final Exam 071219)

function solve(input){

    const changeCase = (command, string)=>{
        if(command === 'upper'){
            return string.toUpperCase();
        }else if(command === 'lower'){
            return string.toLowerCase();
        }
    }

    const getDomain = (string, count)=>{
        console.log(string.substring(string.length - count));

    }

    const getUsername = (string) =>{
        let index = string.indexOf('@');
        if(index === -1){
        console.log("The email " + string + " doesn't contain the @ symbol.");
        }else{
            console.log(string.substring(0,index));
        }
    }

    const replaceWith = (string,char)=>{
        let output = string;
        while(output.indexOf(char) > -1){
            output = output.replace(char,'-');
        }
        return output;
    }

    const encrypt = (string) => {
        let arr = string.split('');
        let output = arr.map(letter=>{
            return letter.charCodeAt()
        }).join(' ');

        console.log(output);

    }


    let email = input.shift();

    for (const line of input) {
        if(line === 'Complete'){
            break;
        }
        let [firstArg, secondArg] = line.split(' ');
        switch(firstArg){
            case 'Make':
                email = changeCase(secondArg.toLowerCase(), email);
                console.log(email);
                break;

            case 'GetDomain':
                getDomain(email,Number(secondArg));
                break;

            case 'GetUsername':
                getUsername(email);
                break;

            case 'Replace':
              email = replaceWith(email, secondArg);
              console.log(email);
                break;

            case 'Encrypt':
                encrypt(email);
                break;
        }


    }


}