feat: Implement scanning in F-Droid build variant

app/build.gradle

@@ -229,6 +229,9 @@ dependencies {
     //open-source licenses
     playStoreImplementation "com.google.android.gms:play-services-oss-licenses:${versions.play_services}"
 
+    // QR Code Scanner
+    fdroidImplementation 'com.github.blikoon:QRCodeScanner:0.1.2'
+
     //Testing
     androidTestImplementation('androidx.test.espresso:espresso-core:3.2.0', {
         exclude group: 'com.android.support', module: 'support-annotations'

app/src/fdroid/java/com/eventyay/organizer/common/di/module/android/FlavorModule.java

@@ -1,7 +1,13 @@
 package com.eventyay.organizer.common.di.module.android;
 
+import com.eventyay.organizer.core.attendee.qrscan.ScanQRActivity;
+
 import dagger.Module;
+import dagger.android.ContributesAndroidInjector;
 
 @Module
 public abstract class FlavorModule {
+
+    @ContributesAndroidInjector(modules = BarcodeFragmentBuildersModule.class)
+    abstract ScanQRActivity contributeScanQRActivity();
 }

app/src/fdroid/java/com/eventyay/organizer/core/attendee/ScanQRView.java

@@ -0,0 +1,26 @@
+package com.eventyay.organizer.core.attendee;
+
+import androidx.annotation.NonNull;
+
+import com.eventyay.organizer.data.attendee.Attendee;
+
+public interface ScanQRView {
+
+    boolean hasCameraPermission();
+
+    void requestCameraPermission();
+
+    void showPermissionError(String error);
+
+    void onScannedAttendee(Attendee attendee);
+
+    void showBarcodePanel(boolean show);
+
+    void showMessage(@NonNull int stringRes);
+
+    void setTint(boolean matched);
+
+    void showProgress(boolean show);
+
+    void startScan();
+}

app/src/fdroid/java/com/eventyay/organizer/core/attendee/ScanningDecider.java

@@ -1,13 +1,16 @@
 package com.eventyay.organizer.core.attendee;
 
 import android.content.Context;
-import android.widget.Toast;
+import android.content.Intent;
 
-import com.eventyay.organizer.R;
+import com.eventyay.organizer.core.main.MainActivity;
 
 public class ScanningDecider {
 
     public void openScanQRActivity(Context context, long eventId) {
-        Toast.makeText(context, R.string.scanning_disabled_message, Toast.LENGTH_SHORT).show();
+        Intent intent = new Intent(context, com.eventyay.organizer.core.attendee.qrscan.ScanQRActivity.class);
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        intent.putExtra(MainActivity.EVENT_KEY, eventId);
+        context.startActivity(intent);
     }
 }

app/src/fdroid/java/com/eventyay/organizer/core/attendee/qrscan/ScanQRActivity.java

@@ -0,0 +1,231 @@
+package com.eventyay.organizer.core.attendee.qrscan;
+
+import android.Manifest;
+import android.Manifest.permission;
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.ActivityInfo;
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.lifecycle.ViewModelProviders;
+
+import android.widget.Button;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.blikoon.qrcodescanner.QrCodeActivity;
+import com.eventyay.organizer.R;
+import com.eventyay.organizer.core.attendee.ScanQRView;
+import com.eventyay.organizer.core.attendee.checkin.AttendeeCheckInFragment;
+import com.eventyay.organizer.core.main.MainActivity;
+import com.eventyay.organizer.data.attendee.Attendee;
+import com.eventyay.organizer.ui.ViewUtils;
+
+import javax.inject.Inject;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import dagger.android.AndroidInjection;
+import dagger.android.AndroidInjector;
+import dagger.android.DispatchingAndroidInjector;
+import dagger.android.HasActivityInjector;
+import dagger.android.support.DaggerAppCompatActivity;
+import io.reactivex.disposables.CompositeDisposable;
+import timber.log.Timber;
+
+import static com.eventyay.organizer.ui.ViewUtils.showView;
+
+@SuppressWarnings("PMD.TooManyMethods")
+public class ScanQRActivity extends DaggerAppCompatActivity implements ScanQRView, HasActivityInjector {
+
+    public static final int PERM_REQ_CODE = 123;
+    private static final int REQUEST_CODE_QR_SCAN = 101;
+
+    @BindView(R.id.barcodePanel)
+    TextView barcodePanel;
+
+    @BindView(R.id.progressBar)
+    ProgressBar progressBar;
+
+    @BindView(R.id.startScanningAgain)
+    Button startScanningAgain;
+
+    @Inject
+    ViewModelProvider.Factory viewModelFactory;
+
+    @Inject
+    DispatchingAndroidInjector<Activity> dispatchingAndroidInjector;
+
+    private ScanQRViewModel scanQRViewModel;
+
+    private final CompositeDisposable compositeDisposable = new CompositeDisposable();
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        AndroidInjection.inject(this);
+        super.onCreate(savedInstanceState);
+        scanQRViewModel = ViewModelProviders.of(this, viewModelFactory).get(ScanQRViewModel.class);
+
+        setContentView(R.layout.activity_scan_qr);
+
+        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
+
+        ButterKnife.bind(this);
+
+        onCameraLoaded();
+
+        startScanningAgain.setOnClickListener(v -> startScan());
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+
+        long eventId = getIntent().getLongExtra(MainActivity.EVENT_KEY, -1);
+        if (eventId == -1) {
+            Timber.d("No Event ID provided. Exiting ...");
+            finish();
+            return;
+        }
+
+        scanQRViewModel.getProgress().observe(this, this::showProgress);
+        scanQRViewModel.getError().observe(this, this::showPermissionError);
+        scanQRViewModel.getMessage().observe(this, this::showMessage);
+        scanQRViewModel.getTint().observe(this, this::setTint);
+        scanQRViewModel.getShowBarcodePanelLiveData().observe(this, this::showBarcodePanel);
+        scanQRViewModel.getOnScannedAttendeeLiveData().observe(this, this::onScannedAttendee);
+        scanQRViewModel.loadAttendees();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+
+        compositeDisposable.dispose();
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        if (requestCode != PERM_REQ_CODE)
+            return;
+
+        // If request is cancelled, the result arrays are empty.
+        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+            cameraPermissionGranted(true);
+        } else {
+            cameraPermissionGranted(false);
+        }
+    }
+
+    // View Implementation Start
+
+    @Override
+    public boolean hasCameraPermission() {
+        return ContextCompat.checkSelfPermission(this, permission.CAMERA) == PackageManager.PERMISSION_GRANTED;
+    }
+
+    @Override
+    public void requestCameraPermission() {
+        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, PERM_REQ_CODE);
+    }
+
+    @Override
+    public void showPermissionError(String error) {
+        Toast.makeText(this, error, Toast.LENGTH_SHORT).show();
+    }
+
+    @Override
+    public void onScannedAttendee(Attendee attendee) {
+        showToggleDialog(attendee.getId());
+    }
+
+    @Override
+    public void showBarcodePanel(boolean show) {
+        showView(barcodePanel, show);
+    }
+
+    @Override
+    public void showMessage(int stringRes) {
+        barcodePanel.setText(getString(stringRes));
+    }
+
+    @Override
+    public void setTint(boolean matched) {
+        ViewUtils.setTint(barcodePanel,
+            ContextCompat.getColor(this, matched ? R.color.green_a400 : R.color.red_500)
+        );
+    }
+
+    @Override
+    public void showProgress(boolean show) {
+        showView(progressBar, show);
+    }
+
+    public void onCameraLoaded() {
+        if (hasCameraPermission()) {
+            startScan();
+        } else {
+            requestCameraPermission();
+        }
+    }
+
+    public void cameraPermissionGranted(boolean granted) {
+        if (granted) {
+            startScan();
+        } else {
+            showProgress(false);
+            showPermissionError("User denied permission");
+        }
+    }
+
+    @Override
+    public void startScan() {
+        Intent i = new Intent(ScanQRActivity.this, QrCodeActivity.class);
+        startActivityForResult(i, REQUEST_CODE_QR_SCAN);
+    }
+
+    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
+
+        if (requestCode == REQUEST_CODE_QR_SCAN) {
+            if (intent == null)
+                return;
+
+            scanQRViewModel.processBarcode(intent.getStringExtra
+                ("com.blikoon.qrcodescanner.got_qr_scan_relult"));
+
+        } else {
+            super.onActivityResult(requestCode, resultCode, intent);
+        }
+    }
+
+    public void showToggleDialog(long attendeeId) {
+        AttendeeCheckInFragment bottomSheetDialogFragment = AttendeeCheckInFragment.newInstance(attendeeId);
+        bottomSheetDialogFragment.show(getSupportFragmentManager(), bottomSheetDialogFragment.getTag());
+        bottomSheetDialogFragment.setOnCancelListener(() -> {
+            ViewUtils.setTint(barcodePanel, ContextCompat.getColor(this, R.color.light_blue_a400));
+            showBarcodePanel(false);
+            startScan();
+        });
+    }
+
+    @Override
+    public AndroidInjector<Activity> activityInjector() {
+        return dispatchingAndroidInjector;
+    }
+}

app/src/fdroid/res/layout/activity_scan_qr.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/activity_scan_qr"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="com.eventyay.organizer.core.attendee.qrscan.ScanQRActivity">
+
+    <TextView
+        android:id="@+id/barcodePanel"
+        style="@style/TextCapsule"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:visibility="gone"
+        tools:text="Barcode Value"
+        tools:visibility="visible" />
+
+    <ProgressBar
+        android:id="@+id/progressBar"
+        style="?android:attr/progressBarStyle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:orientation="vertical">
+
+        <ImageView
+            android:layout_width="@dimen/avatar_size"
+            android:layout_height="@dimen/avatar_size"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginBottom="@dimen/spacing_large"
+            android:src="@drawable/qrcode_scan" />
+
+        <Button
+            android:id="@+id/startScanningAgain"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:background="@color/light_blue_500"
+            android:padding="@dimen/spacing_medium"
+            android:text="@string/start_scanning_again" />
+
+    </LinearLayout>
+
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/AndroidManifest.xml

@@ -6,6 +6,7 @@
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.VIBRATE" />
 
     <application
         android:name="com.eventyay.organizer.OrgaApplication"

app/src/main/java/com/eventyay/organizer/core/attendee/qrscan/ScanQRViewModel.java

@@ -110,7 +110,7 @@ public List<Attendee> getAttendees() {
         return attendees;
     }
 
-    private void processBarcode(String barcode) {
+    public void processBarcode(String barcode) {
 
         Observable.fromIterable(attendees)
             .filter(attendee -> attendee.getOrder() != null)
@@ -141,6 +141,7 @@ private void checkAttendee(Attendee attendee) {
             toCheckOut && !attendee.isCheckedIn);
 
         attendee.setChecking(true);
+        showBarcodePanelLiveData.setValue(true);
 
         if (toCheckIn) {
             message.setValue(

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

@@ -33,6 +33,7 @@
 
     <dimen name="image_small">50dp</dimen>
     <dimen name="image_medium">60dp</dimen>
+    <dimen name="image_large">70dp</dimen>
     <dimen name="progressbar_large">80dp</dimen>
 
     <dimen name="check_in_button_width">100dp</dimen>

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

@@ -401,6 +401,7 @@
     <string name="yes">Yes</string>
     <string name="no">No</string>
     <string name="my_account">My Account</string>
+    <string name="start_scanning_again">Start scanning again</string>
 
     <string-array name="timezones">
         <item>Africa/Abidjan</item>