//
// CHALLENGE (work in pairs):
// Move from f(o) -> o.f() and sure that the code is CQS compliant.
//


// 1
// class CsvParser<T extends Lines> {
//     Collection<T> parse(File location) {
//     }
// }

class Csv <T>{
    Collection<T extends Lines> content(File f);
}

class CsvFile<T extends Lines>{
    public CsvFile(Path path);
    Collection<T> lines();
    //or return stream -> this means lazy and read only
}


// 2
interface Ping {
    void send();
}

or Endpoint{ (or antyhing)
    void ping();
}


// 3
interface TcpSocket {
    Stream<Byte> read(); //verb so should return void
    Stream<Byte> stream(); // ok
}


// 4
// Iovation - a company that maintains a blacklist of email addresses and corresponding IPs
interface IovationClientRequest {
     String getEmail();
     String getIpAddress();
     boolean blockAccess();
}


this way:

interface IovationService {
    boolean shouldBlockWebsiteVisitor(WebsiteVisitor wv)
}

interFACE WebsiteVisitor {
     String email();
     String ipAddress();
}



// 5
interface User{
    String username, password;
    Token authenticate() throws WrongUserCredentialsProvided
}

this way:

interface Authentication{
    Authentication (String username, String password);
    Token token();
    void attempt();
}

auth = new Authentication(...)
auth.token();

// 6
interface Test {
    interface Result {
        void prettyPrint();
    }
    boolean hasFinished();
    Collection<Test.Result> results();
}

if (test.finished()) {
    //refactor into stream
    //test.results().forEach(Test.Result""prettyPrint)
    for (Test.Result testResult : test.results()) {
        testResult.prettyPrint();
    }
}


// 7
boolean destroyButtonAvailable =
    widgets
        .stream()
        .filter(Widget::isButton)
        .filter(Buttonlabel::isRedButton)
    OR
        map Button::label
        filter "Destory the world"::equals
        OR anyMatch instead of filter

        .isPresent();

class Buttonlabel implements Predicate<Button>{
        public static boolean isRedButton (Button b){
            return b.label().equals("Destroy The World");
        }
}

// 8
interface File {
     void openIfFound();
}