Add registration feature

app/src/main/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.testapp">
+          package="com.testapp">
 
     <!-- To auto-complete the email text field in the login form with the user's emails -->
-    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
-    <uses-permission android:name="android.permission.READ_PROFILE" />
-    <uses-permission android:name="android.permission.READ_CONTACTS" />
-    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
+    <uses-permission android:name="android.permission.READ_PROFILE"/>
+    <uses-permission android:name="android.permission.READ_CONTACTS"/>
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 
     <application
         android:name=".CustomApplication"
@@ -20,31 +20,33 @@
             android:name=".LoginActivity"
             android:label="@string/app_name">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
+                <action android:name="android.intent.action.MAIN"/>
 
-                <category android:name="android.intent.category.LAUNCHER" />
+                <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
         <activity
             android:name=".NavDrawerActivity"
             android:label="@string/title_activity_nav_drawer"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.NoActionBar"/>
         <activity
             android:name=".SearchActivity"
             android:label="@string/title_activity_search"
-            android:theme="@style/AppTheme.NoActionBar" />
+            android:theme="@style/AppTheme.NoActionBar"/>
         <activity
             android:name=".DishViewActivity"
             android:label="@string/title_activity_blahblah"
-            android:theme="@style/AppTheme" />
+            android:theme="@style/AppTheme"/>
         <activity
             android:name=".StallViewActivity"
             android:label="@string/title_activity_stall_view"
-            android:theme="@style/AppTheme" />
+            android:theme="@style/AppTheme"/>
         <activity
             android:name=".AddDishReviewActivity"
             android:label="@string/title_activity_add_dish_review"
-            android:theme="@style/AppTheme"></activity>
+            android:theme="@style/AppTheme"/>
+        <activity android:name=".RegisterActivity">
+        </activity>
     </application>
 
 </manifest>
\ No newline at end of file

app/src/main/java/com/testapp/CanteeneoApiInterface.java

@@ -5,6 +5,7 @@ import com.testapp.entities.Dish;
 import com.testapp.entities.DishReview;
 import com.testapp.entities.DishType;
 import com.testapp.entities.Location;
+import com.testapp.entities.NewUserResult;
 import com.testapp.entities.Stall;
 import com.testapp.entities.StallReview;
 import com.testapp.entities.Token;
@@ -15,6 +16,8 @@ import okhttp3.ResponseBody;
 import retrofit2.Call;
 
 import retrofit2.http.Body;
+import retrofit2.http.Field;
+import retrofit2.http.FormUrlEncoded;
 import retrofit2.http.GET;
 import retrofit2.http.POST;
 import retrofit2.http.Path;
@@ -54,6 +57,10 @@ public interface CanteeneoApiInterface {
     @POST("api/dishes/{id}/reviews")
     Call<ResponseBody> newDishReview(@Path("id") int id, @Body DishReview review);
 
+    @FormUrlEncoded
+    @POST("api/users/new")
+    Call<NewUserResult> newUser(@Field("email") String email, @Field("username") String username, @Field("password") String password);
+
     @GET("api/token")
     Call<Token> getToken();
 }

app/src/main/java/com/testapp/LoginActivity.java

@@ -69,10 +69,23 @@ public class LoginActivity extends AppCompatActivity {
             }
         });
 
+        Button mRegisterButton = (Button) findViewById(R.id.register_button);
+        mRegisterButton.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                register();
+            }
+        });
+
         mLoginFormView = findViewById(R.id.login_form);
         mProgressView = findViewById(R.id.login_progress);
     }
 
+    public void register() {
+        Intent intent = new Intent(this, RegisterActivity.class);
+        startActivity(intent);
+    }
+
     public void guestLogin() {
         Intent intent = new Intent(this, NavDrawerActivity.class);
         startActivity(intent);
@@ -92,8 +105,8 @@ public class LoginActivity extends AppCompatActivity {
         boolean cancel = false;
         View focusView = null;
 
-        if (!TextUtils.isEmpty(password)) {
-            mPasswordView.setError(getString(R.string.error_invalid_password));
+        if (TextUtils.isEmpty(password)) {
+            mUsernameView.setError(getString(R.string.error_field_required));
             focusView = mPasswordView;
             cancel = true;
         }
@@ -180,9 +193,6 @@ public class LoginActivity extends AppCompatActivity {
 
             if (success) {
                 finish();
-            } else {
-                mPasswordView.setError(getString(R.string.error_incorrect_password));
-                mPasswordView.requestFocus();
             }
         }
 

app/src/main/java/com/testapp/RegisterActivity.java

+package com.testapp;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.annotation.TargetApi;
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.text.TextUtils;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.inputmethod.EditorInfo;
+import android.widget.AutoCompleteTextView;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.testapp.entities.NewUserResult;
+import com.testapp.entities.Token;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class RegisterActivity extends AppCompatActivity {
+
+    private EditText mEmailView;
+    private EditText mUsernameView;
+    private EditText mPasswordView;
+    private EditText mConfirmPasswordView;
+    private View mProgressView;
+    private View mRegisterFormView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_register);
+
+        mEmailView = (EditText)findViewById(R.id.email);
+        mUsernameView = (EditText) findViewById(R.id.username);
+        mPasswordView = (EditText) findViewById(R.id.password);
+        mConfirmPasswordView = (EditText)findViewById(R.id.confirm_password);
+
+        Button mRegisterButton = (Button) findViewById(R.id.register_button);
+        mRegisterButton.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                attemptSignIn();
+            }
+        });
+
+        mRegisterFormView = findViewById(R.id.register_form);
+        mProgressView = findViewById(R.id.register_progress);
+    }
+
+    private void attemptSignIn() {
+        mEmailView.setError(null);
+        mUsernameView.setError(null);
+        mPasswordView.setError(null);
+
+        String email = mEmailView.getText().toString();
+        String username = mUsernameView.getText().toString();
+        String password = mPasswordView.getText().toString();
+        String confirm_password = mConfirmPasswordView.getText().toString();
+
+        boolean cancel = false;
+        View focusView = null;
+
+        if(TextUtils.isEmpty(email)) {
+            mEmailView.setError(getString(R.string.error_field_required));
+            focusView = mEmailView;
+            cancel = true;
+        }
+
+        if(TextUtils.isEmpty(password)) {
+            mPasswordView.setError(getString(R.string.error_field_required));
+            focusView = mPasswordView;
+            cancel = true;
+        }
+
+        if(!password.equals(confirm_password)) {
+            mPasswordView.setError(getString(R.string.error_password_match));
+            mConfirmPasswordView.setError(getString(R.string.error_password_match));
+            focusView = mPasswordView;
+            cancel = true;
+        }
+
+        if (TextUtils.isEmpty(username)) {
+            mUsernameView.setError(getString(R.string.error_field_required));
+            focusView = mUsernameView;
+            cancel = true;
+        }
+
+        if (cancel) {
+            focusView.requestFocus();
+        } else {
+            showProgress(true);
+
+            Call<NewUserResult> call = AppUtils.service.newUser(email, username, password);
+            call.enqueue(new Callback<NewUserResult>() {
+                @Override
+                public void onResponse(Call<NewUserResult> call, Response<NewUserResult> response) {
+                    showProgress(false);
+
+                    NewUserResult result = response.body();
+                    if(result.isSuccess()) {
+                        Intent intent = new Intent(RegisterActivity.this, LoginActivity.class);
+                        startActivity(intent);
+                    } else {
+                        registerError(result.getField());
+                    }
+                }
+
+                @Override
+                public void onFailure(Call<NewUserResult> call, Throwable t) {
+                    showProgress(false);
+                    Toast.makeText(RegisterActivity.this, "Server failure, please try again. Message: " + t.getMessage(), Toast.LENGTH_LONG);
+                }
+            });
+        }
+    }
+
+    public void registerError(String field) {
+        if(field.equals("username")) {
+            mUsernameView.setError(getString(R.string.error_username_taken));
+            mUsernameView.requestFocus();
+        }
+        if(field.equals("email")) {
+            mEmailView.setError(getString(R.string.error_email_taken));
+            mEmailView.requestFocus();
+        }
+    }
+
+
+    @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
+    private void showProgress(final boolean show) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
+            int shortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime);
+
+            mRegisterFormView.setVisibility(show ? View.GONE : View.VISIBLE);
+            mRegisterFormView.animate().setDuration(shortAnimTime).alpha(
+                    show ? 0 : 1).setListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    mRegisterFormView.setVisibility(show ? View.GONE : View.VISIBLE);
+                }
+            });
+
+            mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
+            mProgressView.animate().setDuration(shortAnimTime).alpha(
+                    show ? 1 : 0).setListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
+                }
+            });
+        } else {
+            mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
+            mRegisterFormView.setVisibility(show ? View.GONE : View.VISIBLE);
+        }
+    }
+}

app/src/main/java/com/testapp/entities/NewUserResult.java

+package com.testapp.entities;
+
+public class NewUserResult {
+
+    boolean success;
+    String field;
+
+    public NewUserResult(boolean success, String field) {
+        this.success = success;
+        this.field = field;
+    }
+
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public void setSuccess(boolean success) {
+        this.success = success;
+    }
+
+    public String getField() {
+        return field;
+    }
+
+    public void setField(String field) {
+        this.field = field;
+    }
+}

app/src/main/res/layout/activity_login.xml

@@ -80,17 +80,18 @@
                 android:text="@string/action_sign_in"/>
 
             <Button
-                android:id="@+id/register_button"
+                android:id="@+id/use_as_guest_button"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
                 android:text="@string/action_guest"/>
 
             <Button
-                android:id="@+id/use_as_guest_button"
-                style="@android:style/Widget.Material.Light.Button.Borderless"
+                android:id="@+id/register_button"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:text="@string/action_register"
+                android:layout_marginTop="16dp"
                 android:elevation="0dp"/>
 
         </LinearLayout>

app/src/main/res/layout/activity_register.xml

+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              xmlns:app="http://schemas.android.com/apk/res-auto"
+              xmlns:tools="http://schemas.android.com/tools"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent"
+              android:gravity="center_horizontal"
+              android:orientation="vertical"
+              android:paddingBottom="@dimen/activity_vertical_margin"
+              android:paddingLeft="@dimen/activity_horizontal_margin"
+              android:paddingRight="@dimen/activity_horizontal_margin"
+              android:paddingTop="@dimen/activity_vertical_margin"
+              android:focusable="true"
+              android:focusableInTouchMode="true"
+              tools:context="com.testapp.RegisterActivity">
+
+    <ProgressBar
+        android:id="@+id/register_progress"
+        style="?android:attr/progressBarStyleLarge"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:visibility="gone" />
+
+    <ScrollView
+        android:id="@+id/register_form"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <LinearLayout
+            android:id="@+id/email_login_form"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <ImageView
+                android:layout_width="match_parent"
+                android:layout_height="166dp"
+                app:srcCompat="@drawable/temp_logo"
+                android:id="@+id/imageView2"
+                android:scaleType="fitCenter" />
+
+            <android.support.design.widget.TextInputLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <EditText
+                    android:id="@+id/email"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:hint="@string/prompt_email"
+                    android:inputType="text"/>
+            </android.support.design.widget.TextInputLayout>
+
+            <android.support.design.widget.TextInputLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <EditText
+                    android:id="@+id/username"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:hint="@string/prompt_username"
+                    android:inputType="text"/>
+
+            </android.support.design.widget.TextInputLayout>
+
+            <android.support.design.widget.TextInputLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <EditText
+                    android:id="@+id/password"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:hint="@string/prompt_password"
+                    android:imeActionId="@+id/login"
+                    android:imeActionLabel="@string/action_sign_in_short"
+                    android:imeOptions="actionUnspecified"
+                    android:inputType="textPassword"
+                    android:maxLines="1" />
+
+            </android.support.design.widget.TextInputLayout>
+
+            <android.support.design.widget.TextInputLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content">
+
+                <EditText
+                    android:id="@+id/confirm_password"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:hint="@string/prompt_confirm_password"
+                    android:imeActionId="@+id/register"
+                    android:imeActionLabel="@string/action_sign_in_short"
+                    android:imeOptions="actionUnspecified"
+                    android:inputType="textPassword"
+                    android:maxLines="1" />
+
+            </android.support.design.widget.TextInputLayout>
+
+            <Button
+                android:id="@+id/register_button"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="16dp"
+                android:text="@string/action_register_short"/>
+
+        </LinearLayout>
+    </ScrollView>
+</LinearLayout>

app/src/main/res/values/strings.xml

 <resources>
     <string name="app_name">Canteeneo</string>
 
-    <!-- Strings related to login -->
+    <string name="prompt_email">E-mail</string>
     <string name="prompt_username">Username</string>
     <string name="prompt_password">Password</string>
+    <string name="prompt_confirm_password">Confirm Password</string>
     <string name="action_sign_in">Sign in</string>
     <string name="action_sign_in_short">Sign in</string>
-    <string name="action_register">New User? Register Here</string>
+    <string name="action_register">Register</string>
+    <string name="action_register_short">Register</string>
     <string name="error_invalid_email">This email address is invalid</string>
+    <string name="error_email_taken">This email address is already in our database</string>
+    <string name="error_username_taken">This username is already taken</string>
     <string name="error_invalid_password">This password is too short</string>
     <string name="error_incorrect_password">This password is incorrect</string>
     <string name="error_field_required">This field is required</string>
-    <string name="permission_rationale">"Contacts permissions are needed for providing email
-        completions."</string>
+    <string name="error_password_match">Passwords do not match!</string>
     <string name="action_guest">Use as guest</string>
     <string name="title_activity_nav_drawer">Main Menu</string>
     <string name="drawer_1">All Items</string>