Added Firebase authentication

1 files changed, 113 insertions, 0 deletions

diff --git a/app/src/main/java/org/marcinzelent/liberavem/LoginActivity.java b/app/src/main/java/org/marcinzelent/liberavem/LoginActivity.java
new file mode 100644
index 0000000..25acb3d
--- /dev/null
+++ b/app/src/main/java/org/marcinzelent/liberavem/LoginActivity.java
@@ -0,0 +1,113 @@
+package org.marcinzelent.liberavem;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ProgressBar;
+import android.widget.Toast;
+
+import com.google.android.gms.tasks.OnCompleteListener;
+import com.google.android.gms.tasks.Task;
+import com.google.firebase.auth.AuthResult;
+import com.google.firebase.auth.FirebaseAuth;
+
+public class LoginActivity extends AppCompatActivity {
+
+    private EditText inputEmail, inputPassword;
+    private FirebaseAuth auth;
+    private ProgressBar progressBar;
+    private Button btnSignup, btnLogin, btnReset;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        //Get Firebase auth instance
+        auth = FirebaseAuth.getInstance();
+
+        if (auth.getCurrentUser() != null) {
+            startActivity(new Intent(LoginActivity.this, MainActivity.class));
+            finish();
+        }
+
+        // set the view now
+        setContentView(R.layout.activity_login);
+
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
+        inputEmail = (EditText) findViewById(R.id.email);
+        inputPassword = (EditText) findViewById(R.id.password);
+        progressBar = (ProgressBar) findViewById(R.id.progressBar);
+        btnSignup = (Button) findViewById(R.id.btn_signup);
+        btnLogin = (Button) findViewById(R.id.btn_login);
+        btnReset = (Button) findViewById(R.id.btn_reset_password);
+
+        //Get Firebase auth instance
+        auth = FirebaseAuth.getInstance();
+
+        btnSignup.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                startActivity(new Intent(LoginActivity.this, SignupActivity.class));
+            }
+        });
+
+        btnReset.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                startActivity(new Intent(LoginActivity.this, ResetPasswordActivity.class));
+            }
+        });
+
+        btnLogin.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                String email = inputEmail.getText().toString();
+                final String password = inputPassword.getText().toString();
+
+                if (TextUtils.isEmpty(email)) {
+                    Toast.makeText(getApplicationContext(), "Enter email address!", Toast.LENGTH_SHORT).show();
+                    return;
+                }
+
+                if (TextUtils.isEmpty(password)) {
+                    Toast.makeText(getApplicationContext(), "Enter password!", Toast.LENGTH_SHORT).show();
+                    return;
+                }
+
+                progressBar.setVisibility(View.VISIBLE);
+
+                //authenticate user
+                auth.signInWithEmailAndPassword(email, password)
+                        .addOnCompleteListener(LoginActivity.this, new OnCompleteListener<AuthResult>() {
+                            @Override
+                            public void onComplete(@NonNull Task<AuthResult> task) {
+                                // If sign in fails, display a message to the user. If sign in succeeds
+                                // the auth state listener will be notified and logic to handle the
+                                // signed in user can be handled in the listener.
+                                progressBar.setVisibility(View.GONE);
+                                if (!task.isSuccessful()) {
+                                    // there was an error
+                                    if (password.length() < 6) {
+                                        inputPassword.setError(getString(R.string.minimum_password));
+                                    } else {
+                                        Toast.makeText(LoginActivity.this, getString(R.string.auth_failed), Toast.LENGTH_LONG).show();
+                                    }
+                                } else {
+                                    Intent intent = new Intent(LoginActivity.this, MainActivity.class);
+                                    startActivity(intent);
+                                    finish();
+                                }
+                            }
+                        });
+            }
+        });
+    }
+}
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