@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
setupActionBar();
// set up the DB
helper = new StudentTestDB(this);
helper.getWritableDatabase();
// Set up the login form.
mIdNoView = (EditText) findViewById(R.id.usrId);
mIdNoView.setText(mIdNo);
mCodeView = (EditText) findViewById(R.id.courseCode);
mCodeView.setText(mCode);
mPasswordView = (EditText) findViewById(R.id.password);
if (getIntent().hasExtra("course")) {
mCodeView.setText(getIntent().getStringExtra("course"));
}
mPasswordView.setOnEditorActionListener(
new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) {
if (id == R.id.login || id == EditorInfo.IME_NULL) {
attemptLogin();
return true;
}
return false;
}
});
mLoginFormView = findViewById(R.id.login_form);
mLoginStatusView = findViewById(R.id.login_status);
mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);
findViewById(R.id.sign_in_button)
.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View view) {
attemptLogin();
}
});
if (doesDatabaseExist(getApplication(), StudentTestDB.DB_NAME)) {
Toast.makeText(getApplicationContext(), "Student DB exists", Toast.LENGTH_LONG).show();
} else
Toast.makeText(getApplicationContext(), "Student DB does not exist", Toast.LENGTH_LONG)
.show();
}
/**
* Attempts to sign in or register the account specified by the login form. If there are form
* errors (invalid IdNo, missing fields, etc.), the errors are presented and no actual login
* attempt is made.
*/
public void attemptLogin() {
// Reset errors.
mIdNoView.setError(null);
mCodeView.setError(null);
mPasswordView.setError(null);
// Store values at the time of the login attempt.
mIdNo = mIdNoView.getText().toString();
mCode = mCodeView.getText().toString();
mPassword = mPasswordView.getText().toString();
boolean cancel = false;
View focusView = null;
String path = null;
// Check for a valid IdNo.
if (TextUtils.isEmpty(mIdNo)) {
mIdNoView.setError(getString(R.string.error_field_required));
focusView = mIdNoView;
cancel = true;
}
// check for a non-empty course code
if (TextUtils.isEmpty(mCode)) {
mCodeView.setError(getString(R.string.error_field_required));
focusView = mCodeView;
cancel = true;
}
// Check for a valid password.
if (TextUtils.isEmpty(mPassword)) {
mPasswordView.setError(getString(R.string.error_field_required));
focusView = mPasswordView;
cancel = true;
} else if (mPassword.length() < 4) {
mPasswordView.setError(getString(R.string.error_invalid_password));
focusView = mPasswordView;
cancel = true;
} else {
// password entered is the password of the compressed test file
StudentTestDB db = new StudentTestDB(this);
Cursor testData = db.getTestDataCursor(mCode);
// TODO If a test is already attempted, prevent it from the solution
// being resent -- check status column in DB and give a dialog
// box/set a label along
// with questions notifying the student
// TODO Check test day/time before allowing access to a test
// TODO Set test duration from DB
fileName = mCode;
int status;
if (!testData.moveToFirst()) { // if cursor is null, then that test does
// not exist in database.
Toast.makeText(
getApplicationContext(),
"Test \"" + mCode + "\" does not exist in the database.",
Toast.LENGTH_LONG)
.show();
cancel = true;
} else {
teacherName = testData.getString(2);
duration = testData.getString(5);
fileName = testData.getString(6);
status = testData.getInt(7);
path = Environment.getExternalStorageDirectory() + "/Exam/";
// checks whether the file exists, if yes, extracts the contents
// to
// a folder else throws incorrect p/w if not
// found
File file = new File(path + fileName + ".zip");
ExtractAllFiles ef = new ExtractAllFiles(path, mPassword, fileName);
boolean ext = ef.extract();
if (!ext) {
mPasswordView.setError(getString(R.string.error_incorrect_password));
focusView = mPasswordView;
cancel = true;
}
}
}
if (cancel) {
// There was an error; don't attempt login and focus the first
// form field with an error.
focusView.requestFocus();
} else {
Intent intent = new Intent(LoginActivity.this, Questions.class);
intent.putExtra("teacher", teacherName);
intent.putExtra("path", path);
intent.putExtra("fileName", fileName);
intent.putExtra("crsCode", mCode);
intent.putExtra("idNo", mIdNo);
intent.putExtra("duration", duration);
startActivity(intent);
finish();
}
}
