Refactor : API calls moved out of the LoginActivity (commons-app#5599)

* Refactor :API calls separated from activity added to LoginClient
* getLoginToken() modifier set to private
* Code Cleanup : removed non-null from twofactor and Locale import
* Indentation fix

Author: neeldoshii

app/src/main/java/fr/free/nrw/commons/auth/LoginActivity.java

@@ -30,9 +30,9 @@
 import fr.free.nrw.commons.databinding.ActivityLoginBinding;
 import fr.free.nrw.commons.utils.ActivityUtils;
 import java.util.Locale;
-import fr.free.nrw.commons.wikidata.mwapi.MwQueryResponse;
 import fr.free.nrw.commons.auth.login.LoginCallback;
 
+import java.util.Objects;
 import javax.inject.Inject;
 import javax.inject.Named;
 
@@ -46,9 +46,6 @@
 import fr.free.nrw.commons.utils.SystemThemeUtils;
 import fr.free.nrw.commons.utils.ViewUtil;
 import io.reactivex.disposables.CompositeDisposable;
-import retrofit2.Call;
-import retrofit2.Callback;
-import retrofit2.Response;
 import timber.log.Timber;
 
 import static android.view.KeyEvent.KEYCODE_ENTER;
@@ -75,7 +72,6 @@ public class LoginActivity extends AccountAuthenticatorActivity {
     private AppCompatDelegate delegate;
     private LoginTextWatcher textWatcher = new LoginTextWatcher();
     private CompositeDisposable compositeDisposable = new CompositeDisposable();
-    private Call<MwQueryResponse> loginToken;
     final  String saveProgressDailog="ProgressDailog_state";
     final String saveErrorMessage ="errorMessage";
     final String saveUsername="username";
@@ -116,7 +112,7 @@ public void onCreate(Bundle savedInstanceState) {
             binding.loginCredentials.setVisibility(View.GONE);
         }
     }
-    /** 
+    /**
      * Hides the keyboard if the user's focus is not on the password (hasFocus is false).
      * @param view The keyboard
      * @param hasFocus Set to true if the keyboard has focus
@@ -212,63 +208,52 @@ protected void onDestroy() {
 
     public void performLogin() {
         Timber.d("Login to start!");
-        final String username = binding.loginUsername.getText().toString();
-        final String rawUsername = binding.loginUsername.getText().toString().trim();
-        final String password = binding.loginPassword.getText().toString();
-        String twoFactorCode = binding.loginTwoFactor.getText().toString();
+        final String username = Objects.requireNonNull(binding.loginUsername.getText()).toString();
+        final String password = Objects.requireNonNull(binding.loginPassword.getText()).toString();
+        final String twoFactorCode = Objects.requireNonNull(binding.loginTwoFactor.getText()).toString();
 
         showLoggingProgressBar();
-        doLogin(username, password, twoFactorCode);
+        loginClient.doLogin(username, password, twoFactorCode, Locale.getDefault().getLanguage(),
+            new LoginCallback() {
+                @Override
+                public void success(@NonNull LoginResult loginResult) {
+                    runOnUiThread(()->{
+                        Timber.d("Login Success");
+                        hideProgress();
+                        onLoginSuccess(loginResult);
+                    });
+                }
+
+                @Override
+                public void twoFactorPrompt(@NonNull Throwable caught, @Nullable String token) {
+                    runOnUiThread(()->{
+                        Timber.d("Requesting 2FA prompt");
+                        hideProgress();
+                        askUserForTwoFactorAuth();
+                    });
+                }
+
+                @Override
+                public void passwordResetPrompt(@Nullable String token) {
+                    runOnUiThread(()->{
+                        Timber.d("Showing password reset prompt");
+                        hideProgress();
+                        showPasswordResetPrompt();
+                    });
+                }
+
+                @Override
+                public void error(@NonNull Throwable caught) {
+                    runOnUiThread(()->{
+                        Timber.e(caught);
+                        hideProgress();
+                        showMessageAndCancelDialog(caught.getLocalizedMessage());
+                    });
+                }
+            });
     }
 
-    private void doLogin(String username, String password, String twoFactorCode) {
-        progressDialog.show();
-        loginToken = loginClient.getLoginToken();
-        loginToken.enqueue(
-                new Callback<MwQueryResponse>() {
-                    @Override
-                    public void onResponse(Call<MwQueryResponse> call,
-                                           Response<MwQueryResponse> response) {
-                        loginClient.login(username, password, null, twoFactorCode,
-                                response.body().query().loginToken(), Locale.getDefault().getLanguage(), new LoginCallback() {
-                                    @Override
-                                    public void success(@NonNull LoginResult result) {
-                                        Timber.d("Login Success");
-                                        onLoginSuccess(result);
-                                    }
-
-                                    @Override
-                                    public void twoFactorPrompt(@NonNull Throwable caught,
-                                                                @Nullable String token) {
-                                        Timber.d("Requesting 2FA prompt");
-                                        hideProgress();
-                                        askUserForTwoFactorAuth();
-                                    }
-
-                                    @Override
-                                    public void passwordResetPrompt(@Nullable String token) {
-                                        Timber.d("Showing password reset prompt");
-                                        hideProgress();
-                                        showPasswordResetPrompt();
-                                    }
-
-                                    @Override
-                                    public void error(@NonNull Throwable caught) {
-                                        Timber.e(caught);
-                                        hideProgress();
-                                        showMessageAndCancelDialog(caught.getLocalizedMessage());
-                                    }
-                                });
-                    }
-
-                    @Override
-                    public void onFailure(Call<MwQueryResponse> call, Throwable t) {
-                        Timber.e(t);
-                        showMessageAndCancelDialog(t.getLocalizedMessage());
-                    }
-                });
 
-    }
 
     private void hideProgress() {
         progressDialog.dismiss();
@@ -299,10 +284,6 @@ private void showLoggingProgressBar() {
     }
 
     private void onLoginSuccess(LoginResult loginResult) {
-        if (!progressDialog.isShowing()) {
-            // no longer attached to activity!
-            return;
-        }
         compositeDisposable.clear();
         sessionManager.setUserLoggedIn(true);
         sessionManager.updateAccount(loginResult);

app/src/main/java/fr/free/nrw/commons/auth/login/LoginClient.kt

@@ -28,7 +28,7 @@ class LoginClient(private val loginInterface: LoginInterface) {
      */
     private var userLanguage = ""
 
-    fun getLoginToken() = loginInterface.getLoginToken()
+    private fun getLoginToken() = loginInterface.getLoginToken()
 
     fun request(userName: String, password: String, cb: LoginCallback) {
         cancel()
@@ -106,6 +106,33 @@ class LoginClient(private val loginInterface: LoginInterface) {
         })
     }
 
+    fun doLogin(
+        username: String,
+        password: String,
+        twoFactorCode: String,
+        userLanguage: String,
+        loginCallback: LoginCallback
+    ) {
+        getLoginToken().enqueue(object :Callback<MwQueryResponse?>{
+            override fun onResponse(
+                call: Call<MwQueryResponse?>,
+                response: Response<MwQueryResponse?>
+            ) = if (response.isSuccessful){
+                val loginToken = response.body()?.query()?.loginToken()
+                loginToken?.let {
+                    login(username, password, null, twoFactorCode, it, userLanguage, loginCallback)
+                } ?: run {
+                    loginCallback.error(IOException("Failed to retrieve login token"))
+                }
+            } else {
+                loginCallback.error(IOException("Failed to retrieve login token"))
+            }
+
+            override fun onFailure(call: Call<MwQueryResponse?>, t: Throwable) {
+                loginCallback.error(t)
+            }
+        })
+    }
     @Throws(Throwable::class)
     fun loginBlocking(userName: String, password: String, twoFactorCode: String?) {
         val tokenResponse = getLoginToken().execute()