Add auto-update feature

app/build.gradle

@@ -31,4 +31,5 @@ dependencies {
     implementation 'com.android.support:appcompat-v7:28.0.0'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
     implementation 'com.android.support:design:28.0.0'
+    implementation 'android.arch.work:work-runtime:1.0.1'
 }

app/src/main/java/dummydomain/yetanothercallblocker/MainActivity.java

@@ -20,6 +20,13 @@ public class MainActivity extends AppCompatActivity {
         notificationsSwitch.setOnCheckedChangeListener((buttonView, isChecked)
                 -> CallReceiver.setEnabled(MainActivity.this, isChecked));
 
+        SwitchCompat autoUpdateSwitch = findViewById(R.id.autoUpdateEnabledSwitch);
+        autoUpdateSwitch.setChecked(Updater.isAutoUpdateScheduled());
+        autoUpdateSwitch.setOnCheckedChangeListener((buttonView, isChecked) -> {
+            if (isChecked) Updater.scheduleAutoUpdateWorker();
+            else Updater.cancelAutoUpdateWorker();
+        });
+
         PermissionHelper.checkPermissions(this);
     }
 

app/src/main/java/dummydomain/yetanothercallblocker/UpdateWorker.java

@@ -0,0 +1,32 @@
+package dummydomain.yetanothercallblocker;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import androidx.work.Worker;
+import androidx.work.WorkerParameters;
+import dummydomain.yetanothercallblocker.sia.DatabaseSingleton;
+
+public class UpdateWorker extends Worker {
+
+    private static final Logger LOG = LoggerFactory.getLogger(UpdateWorker.class);
+
+    public UpdateWorker(@NonNull Context context, @NonNull WorkerParameters workerParams) {
+        super(context, workerParams);
+    }
+
+    @NonNull
+    @Override
+    public Result doWork() {
+        LOG.info("doWork() started");
+
+        DatabaseSingleton.getCommunityDatabase().updateSecondaryDb();
+
+        LOG.info("doWork() finished");
+        return Result.success();
+    }
+
+}

app/src/main/java/dummydomain/yetanothercallblocker/Updater.java

@@ -0,0 +1,62 @@
+package dummydomain.yetanothercallblocker;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+import androidx.work.Constraints;
+import androidx.work.NetworkType;
+import androidx.work.PeriodicWorkRequest;
+import androidx.work.WorkInfo;
+import androidx.work.WorkManager;
+
+public class Updater {
+
+    private static final String AUTO_UPDATE_WORK_TAG = "autoUpdateWork";
+
+    private static final Logger LOG = LoggerFactory.getLogger(Updater.class);
+
+    public static void scheduleAutoUpdateWorker() {
+        if (isAutoUpdateScheduled()) return;
+
+        Constraints constraints = new Constraints.Builder()
+                .setRequiredNetworkType(NetworkType.CONNECTED)
+                .build();
+
+        PeriodicWorkRequest updateRequest =
+                new PeriodicWorkRequest.Builder(UpdateWorker.class, 1, TimeUnit.DAYS)
+                        .addTag(AUTO_UPDATE_WORK_TAG)
+                        .setConstraints(constraints)
+                        .build();
+
+        WorkManager.getInstance().enqueue(updateRequest);
+    }
+
+    public static void cancelAutoUpdateWorker() {
+        WorkManager.getInstance().cancelAllWorkByTag(AUTO_UPDATE_WORK_TAG);
+    }
+
+    public static boolean isAutoUpdateScheduled() {
+        return findScheduled() != null;
+    }
+
+    private static WorkInfo findScheduled() {
+        for (WorkInfo workInfo : getWorkInfoList()) {
+            if (workInfo.getState() == WorkInfo.State.ENQUEUED) return workInfo;
+        }
+        return null;
+    }
+
+    private static List<WorkInfo> getWorkInfoList() {
+        try {
+            return WorkManager.getInstance().getWorkInfosByTag(AUTO_UPDATE_WORK_TAG).get();
+        } catch (Exception e) {
+            LOG.warn("getWorkInfoList()", e);
+        }
+        return new ArrayList<>();
+    }
+
+}

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

@@ -12,4 +12,10 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/incoming_call_notifications_enabled" />
+
+    <android.support.v7.widget.SwitchCompat
+        android:id="@+id/autoUpdateEnabledSwitch"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/auto_update_enabled" />
 </LinearLayout>

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

@@ -42,6 +42,7 @@
     <string name="title_activity_reviews">Reviews</string>
 
     <string name="incoming_call_notifications_enabled">Incoming call notifications enabled</string>
+    <string name="auto_update_enabled">Auto-update enabled</string>
 
     <string name="open_debug_activity">Open debug screen</string>
     <string name="debug_activity_label">Debug</string>