chore: boostrap scanner

6 files changed, 270 insertions, 2 deletions

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 08433778..3a762180 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -20,7 +20,10 @@
         android:name="android.permission.WRITE_EXTERNAL_STORAGE"
         tools:ignore="ScopedStorage" /> <!-- Used to show all apps in the allowed Apps selection -->
     <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" />
-
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false" />
+    <uses-permission android:name="android.permission.CAMERA"/>
     <application
         android:name=".base.BitmaskApp"
         android:allowBackup="false"
@@ -111,6 +114,10 @@
                 <action android:name="android.service.quicksettings.action.QS_TILE_PREFERENCES" />
             </intent-filter>
         </activity>
+        <activity android:name=".providersetup.activities.scanner.ScannerActivity"
+            android:launchMode="singleInstance"
+            android:screenOrientation="portrait"
+            android:exported="false" />
         <activity
             android:name=".base.MainActivity"
             android:label="@string/app_name"
diff --git a/app/src/main/java/se/leap/bitmaskclient/providersetup/activities/scanner/ScannerActivity.java b/app/src/main/java/se/leap/bitmaskclient/providersetup/activities/scanner/ScannerActivity.java
new file mode 100644
index 00000000..e3c081c2
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/providersetup/activities/scanner/ScannerActivity.java
@@ -0,0 +1,150 @@
+package se.leap.bitmaskclient.providersetup.activities.scanner;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.OptIn;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.camera.core.CameraSelector;
+import androidx.camera.core.ImageAnalysis;
+import androidx.camera.core.ImageProxy;
+import androidx.camera.core.Preview;
+import androidx.camera.lifecycle.ProcessCameraProvider;
+import androidx.lifecycle.ViewModelProvider;
+
+import com.google.mlkit.vision.barcode.BarcodeScanner;
+import com.google.mlkit.vision.barcode.BarcodeScanning;
+import com.google.mlkit.vision.barcode.common.Barcode;
+import com.google.mlkit.vision.common.InputImage;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import se.leap.bitmaskclient.base.models.Introducer;
+import se.leap.bitmaskclient.databinding.AScannerBinding;
+
+@OptIn(markerClass = androidx.camera.core.ExperimentalGetImage.class)
+public class ScannerActivity extends AppCompatActivity {
+    public static final String INVITE_CODE = "invite_code";
+    private static final String TAG = ScannerActivity.class.getSimpleName();
+    private AScannerBinding binding;
+    private ProcessCameraProvider cameraProvider;
+    private Preview previewUseCase;
+    private CameraSelector cameraSelector;
+    private ImageAnalysis analysisUseCase;
+
+    public static Intent newIntent(Context context) {
+        return new Intent(context, ScannerActivity.class);
+    }
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        binding = AScannerBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        initCamera();
+    }
+
+    private void initCamera() {
+        cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
+        new ViewModelProvider(this, ViewModelProvider.AndroidViewModelFactory.getInstance(getApplication())).get(ScannerViewModel.class).getProcessCameraProvider().observe(this, cameraProvider -> {
+            this.cameraProvider = cameraProvider;
+            bindCameraUseCases();
+        });
+    }
+
+    private void bindCameraUseCases() {
+        bindPreviewUseCase();
+        bindAnalyseUseCase();
+    }
+
+
+    private void bindPreviewUseCase() {
+        if (cameraProvider == null) {
+            return;
+        }
+        if (previewUseCase != null) {
+            cameraProvider.unbind(previewUseCase);
+        }
+
+        previewUseCase = new Preview.Builder().setTargetRotation(binding.previewView.getDisplay().getRotation()).build();
+        previewUseCase.setSurfaceProvider(binding.previewView.getSurfaceProvider());
+
+        try {
+            cameraProvider.bindToLifecycle(this, cameraSelector, previewUseCase);
+        } catch (Exception exception) {
+            Log.e(TAG, exception.getMessage());
+        }
+    }
+
+
+    private void bindAnalyseUseCase() {
+        // Note that if you know which format of barcode your app is dealing with, detection will be
+        // faster to specify the supported barcode formats one by one, e.g.
+        // BarcodeScannerOptions.Builder()
+        //     .setBarcodeFormats(Barcode.FORMAT_QR_CODE)
+        //     .build();
+        BarcodeScanner barcodeScanner = BarcodeScanning.getClient();
+
+        if (cameraProvider == null) {
+            return;
+        }
+        if (analysisUseCase != null) {
+            cameraProvider.unbind(analysisUseCase);
+        }
+
+        analysisUseCase = new ImageAnalysis.Builder().setTargetRotation(binding.previewView.getDisplay().getRotation()).build();
+
+        // Initialize our background executor
+        ExecutorService cameraExecutor = Executors.newSingleThreadExecutor();
+
+        analysisUseCase.setAnalyzer(cameraExecutor, imageProxy -> {
+            // Insert barcode scanning code here
+            processImageProxy(barcodeScanner, imageProxy);
+        });
+
+        try {
+            cameraProvider.bindToLifecycle(this, cameraSelector, analysisUseCase);
+        } catch (Exception exception) {
+            Log.e(TAG, exception.getMessage());
+        }
+    }
+
+    private void processImageProxy(BarcodeScanner barcodeScanner, ImageProxy imageProxy) {
+        InputImage inputImage = InputImage.fromMediaImage(imageProxy.getImage(), imageProxy.getImageInfo().getRotationDegrees());
+
+        barcodeScanner.process(inputImage).addOnSuccessListener(barcodes -> {
+            for (Barcode barcode : barcodes) {
+                try {
+                    Introducer introducer = Introducer.fromUrl(barcode.getRawValue());
+                    if (introducer != null && introducer.validate()) {
+                        imageProxy.close();
+                        setResult(RESULT_OK, new Intent().putExtra(INVITE_CODE, introducer));
+                        finish();
+                    } else {
+                        Toast.makeText(this, "Invalid introducer", Toast.LENGTH_SHORT).show();
+                    }
+                } catch (Exception e) {
+                    Log.e(TAG, e.getMessage());
+                    Toast.makeText(this, "Invalid introducer", Toast.LENGTH_SHORT).show();
+                }
+            }
+        }).addOnFailureListener(e -> {
+            Log.e(TAG, e.getMessage());
+        }).addOnCompleteListener(task -> {
+            // When the image is from CameraX analysis use case, must call image.close() on received
+            // images when finished using them. Otherwise, new images may not be received or the camera
+            // may stall.
+            imageProxy.close();
+        });
+    }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/providersetup/activities/scanner/ScannerViewModel.java b/app/src/main/java/se/leap/bitmaskclient/providersetup/activities/scanner/ScannerViewModel.java
new file mode 100644
index 00000000..d749e512
--- /dev/null
+++ b/app/src/main/java/se/leap/bitmaskclient/providersetup/activities/scanner/ScannerViewModel.java
@@ -0,0 +1,42 @@
+package se.leap.bitmaskclient.providersetup.activities.scanner;
+
+import android.app.Application;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.camera.lifecycle.ProcessCameraProvider;
+import androidx.core.content.ContextCompat;
+import androidx.lifecycle.AndroidViewModel;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+
+import com.google.common.util.concurrent.ListenableFuture;
+
+import java.util.concurrent.ExecutionException;
+
+public class ScannerViewModel extends AndroidViewModel {
+    private static final String TAG = ScannerViewModel.class.getSimpleName();
+    private MutableLiveData<ProcessCameraProvider> cameraProviderLiveData;
+
+    public ScannerViewModel(@NonNull Application application) {
+        super(application);
+    }
+
+    public LiveData<ProcessCameraProvider> getProcessCameraProvider() {
+        if (cameraProviderLiveData == null) {
+            cameraProviderLiveData = new MutableLiveData<>();
+            ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(getApplication());
+            cameraProviderFuture.addListener(() -> {
+                try {
+                    cameraProviderLiveData.setValue(cameraProviderFuture.get());
+                } catch (ExecutionException e) {
+                    // Handle any errors (including cancellation) here.
+                    Log.e(TAG, "Unhandled exception", e);
+                } catch (InterruptedException e) {
+                    Log.e(TAG, "Unhandled exception", e);
+                }
+            }, ContextCompat.getMainExecutor(getApplication()));
+        }
+        return cameraProviderLiveData;
+    }
+}
diff --git a/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/ProviderSelectionFragment.java b/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/ProviderSelectionFragment.java
index e5c19e28..8ccf7993 100644
--- a/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/ProviderSelectionFragment.java
+++ b/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/ProviderSelectionFragment.java
@@ -3,6 +3,10 @@ package se.leap.bitmaskclient.providersetup.fragments;
 import static se.leap.bitmaskclient.providersetup.fragments.viewmodel.ProviderSelectionViewModel.ADD_PROVIDER;
 import static se.leap.bitmaskclient.providersetup.fragments.viewmodel.ProviderSelectionViewModel.INVITE_CODE_PROVIDER;
 
+import android.Manifest;
+import android.app.Activity;
+import android.content.Intent;
+import android.content.pm.PackageManager;
 import android.graphics.Typeface;
 import android.os.Bundle;
 import android.text.Editable;
@@ -12,14 +16,18 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.RadioButton;
 
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
 import androidx.lifecycle.ViewModelProvider;
 
-import java.net.URISyntaxException;
 import java.util.ArrayList;
 
 import se.leap.bitmaskclient.R;
+import se.leap.bitmaskclient.providersetup.activities.scanner.ScannerActivity;
 import se.leap.bitmaskclient.base.models.Introducer;
 import se.leap.bitmaskclient.base.models.Provider;
 import se.leap.bitmaskclient.base.utils.ViewHelper;
@@ -30,6 +38,9 @@ import se.leap.bitmaskclient.providersetup.fragments.viewmodel.ProviderSelection
 
 public class ProviderSelectionFragment extends BaseSetupFragment implements CancelCallback {
 
+    private static final int PERMISSION_GRANTED_REQUEST_CODE = 1;
+    private ActivityResultLauncher<Intent> scannerActivityResultLauncher;
+
     private ProviderSelectionViewModel viewModel;
     private ArrayList<RadioButton> radioButtons;
 
@@ -49,6 +60,15 @@ public class ProviderSelectionFragment extends BaseSetupFragment implements Canc
                 new ProviderSelectionViewModelFactory(
                         getContext().getApplicationContext().getAssets())).
                 get(ProviderSelectionViewModel.class);
+        scannerActivityResultLauncher = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
+            if (result.getResultCode() == Activity.RESULT_OK) {
+                Intent data = result.getData();
+                if (data != null) {
+                    Introducer introducer = data.getParcelableExtra(ScannerActivity.INVITE_CODE);
+                    binding.editCustomProvider.setText(introducer.toUrl());
+                }
+            }
+        });
     }
 
     @Override
@@ -80,6 +100,7 @@ public class ProviderSelectionFragment extends BaseSetupFragment implements Canc
 
         binding.editCustomProvider.setVisibility(viewModel.getEditProviderVisibility());
         binding.syntaxCheck.setVisibility(viewModel.getEditProviderVisibility());
+        binding.qrScanner.setVisibility(viewModel.getQrScannerVisibility());
         return binding.getRoot();
     }
 
@@ -87,6 +108,28 @@ public class ProviderSelectionFragment extends BaseSetupFragment implements Canc
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         setupActivityCallback.registerCancelCallback(this);
+        initQrScanner();
+    }
+
+    private void initQrScanner() {
+        binding.qrScanner.setOnClickListener(v -> {
+            if (isCameraPermissionGranted()) {
+                scannerActivityResultLauncher.launch(ScannerActivity.newIntent(getContext()));
+            } else {
+                ActivityCompat.requestPermissions(
+                        getActivity(),
+                        new String[]{Manifest.permission.CAMERA},
+                        PERMISSION_GRANTED_REQUEST_CODE
+                );
+            }
+        });
+    }
+
+    private boolean isCameraPermissionGranted() {
+        return ContextCompat.checkSelfPermission(
+                getContext(),
+                Manifest.permission.CAMERA
+        ) == PackageManager.PERMISSION_GRANTED;
     }
 
     @Override
@@ -102,6 +145,7 @@ public class ProviderSelectionFragment extends BaseSetupFragment implements Canc
             binding.providerDescription.setText(viewModel.getProviderDescription(getContext()));
             binding.editCustomProvider.setVisibility(viewModel.getEditProviderVisibility());
             binding.syntaxCheck.setVisibility(viewModel.getEditProviderVisibility());
+            binding.qrScanner.setVisibility(viewModel.getQrScannerVisibility());
             if (viewModel.getCustomUrl() == null || viewModel.getCustomUrl().isEmpty()) {
                 binding.syntaxCheckResult.setText("");
                 binding.syntaxCheckResult.setTextColor(getResources().getColor(R.color.color_font_btn));
diff --git a/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/viewmodel/ProviderSelectionViewModel.java b/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/viewmodel/ProviderSelectionViewModel.java
index 58b43fbd..00117336 100644
--- a/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/viewmodel/ProviderSelectionViewModel.java
+++ b/app/src/main/java/se/leap/bitmaskclient/providersetup/fragments/viewmodel/ProviderSelectionViewModel.java
@@ -86,6 +86,13 @@ public class ProviderSelectionViewModel extends ViewModel {
         return provider.getDescription();
     }
 
+    public int getQrScannerVisibility() {
+        if (selected == INVITE_CODE_PROVIDER) {
+            return View.VISIBLE;
+        }
+        return View.GONE;
+    }
+
     public int getEditProviderVisibility() {
         if (selected == ADD_PROVIDER) {
             return View.VISIBLE;
diff --git a/app/src/main/res/layout/a_scanner.xml b/app/src/main/res/layout/a_scanner.xml
new file mode 100644
index 00000000..5fb2db53
--- /dev/null
+++ b/app/src/main/res/layout/a_scanner.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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"
+    tools:context=".providersetup.activities.scanner.ScannerActivity">
+
+    <androidx.camera.view.PreviewView
+        android:id="@+id/previewView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file