Move utility methods out of CheckForNewAppVersion

app/src/main/java/org/schabi/newpipe/CheckForNewAppVersion.java

@@ -1,12 +1,9 @@
 package org.schabi.newpipe;
 
-import android.app.Application;
 import android.app.IntentService;
 import android.app.PendingIntent;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.pm.PackageManager;
-import android.content.pm.Signature;
 import android.net.Uri;
 import android.util.Log;
 
@@ -14,29 +11,17 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.core.app.NotificationCompat;
 import androidx.core.app.NotificationManagerCompat;
-import androidx.core.content.pm.PackageInfoCompat;
 import androidx.preference.PreferenceManager;
 
 import com.grack.nanojson.JsonObject;
 import com.grack.nanojson.JsonParser;
 import com.grack.nanojson.JsonParserException;
 
-import org.schabi.newpipe.error.ErrorInfo;
-import org.schabi.newpipe.error.ErrorUtil;
-import org.schabi.newpipe.error.UserAction;
 import org.schabi.newpipe.extractor.downloader.Response;
 import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
+import org.schabi.newpipe.util.ReleaseVersionUtil;
 
-import java.io.ByteArrayInputStream;
 import java.io.IOException;
-import java.io.InputStream;
-import java.security.MessageDigest;
-import java.security.NoSuchAlgorithmException;
-import java.security.cert.CertificateEncodingException;
-import java.security.cert.CertificateException;
-import java.security.cert.CertificateFactory;
-import java.security.cert.X509Certificate;
-import java.util.List;
 
 public final class CheckForNewAppVersion extends IntentService {
     public CheckForNewAppVersion() {
@@ -45,122 +30,45 @@ public final class CheckForNewAppVersion extends IntentService {
 
     private static final boolean DEBUG = MainActivity.DEBUG;
     private static final String TAG = CheckForNewAppVersion.class.getSimpleName();
-
-    // Public key of the certificate that is used in NewPipe release versions
-    private static final String RELEASE_CERT_PUBLIC_KEY_SHA1
-            = "B0:2E:90:7C:1C:D6:FC:57:C3:35:F0:88:D0:8F:50:5F:94:E4:D2:15";
     private static final String NEWPIPE_API_URL = "https://newpipe.net/api/data.json";
 
-    /**
-     * Method to get the APK's SHA1 key. See https://stackoverflow.com/questions/9293019/#22506133.
-     *
-     * @param application The application
-     * @return String with the APK's SHA1 fingerprint in hexadecimal
-     */
-    @NonNull
-    private static String getCertificateSHA1Fingerprint(@NonNull final Application application) {
-        final List<Signature> signatures;
-        try {
-            signatures = PackageInfoCompat.getSignatures(application.getPackageManager(),
-                    application.getPackageName());
-        } catch (final PackageManager.NameNotFoundException e) {
-            ErrorUtil.createNotification(application, new ErrorInfo(e,
-                    UserAction.CHECK_FOR_NEW_APP_VERSION, "Could not find package info"));
-            return "";
-        }
-        if (signatures.isEmpty()) {
-            return "";
-        }
-
-        final X509Certificate c;
-        try {
-            final byte[] cert = signatures.get(0).toByteArray();
-            final InputStream input = new ByteArrayInputStream(cert);
-            final CertificateFactory cf = CertificateFactory.getInstance("X509");
-            c = (X509Certificate) cf.generateCertificate(input);
-        } catch (final CertificateException e) {
-            ErrorUtil.createNotification(application, new ErrorInfo(e,
-                    UserAction.CHECK_FOR_NEW_APP_VERSION, "Certificate error"));
-            return "";
-        }
-
-        try {
-            final MessageDigest md = MessageDigest.getInstance("SHA1");
-            final byte[] publicKey = md.digest(c.getEncoded());
-            return byte2HexFormatted(publicKey);
-        } catch (NoSuchAlgorithmException | CertificateEncodingException e) {
-            ErrorUtil.createNotification(application, new ErrorInfo(e,
-                    UserAction.CHECK_FOR_NEW_APP_VERSION, "Could not retrieve SHA1 key"));
-            return "";
-        }
-    }
-
-    private static String byte2HexFormatted(final byte[] arr) {
-        final StringBuilder str = new StringBuilder(arr.length * 2);
-
-        for (int i = 0; i < arr.length; i++) {
-            String h = Integer.toHexString(arr[i]);
-            final int l = h.length();
-            if (l == 1) {
-                h = "0" + h;
-            }
-            if (l > 2) {
-                h = h.substring(l - 2, l);
-            }
-            str.append(h.toUpperCase());
-            if (i < (arr.length - 1)) {
-                str.append(':');
-            }
-        }
-        return str.toString();
-    }
-
     /**
      * Method to compare the current and latest available app version.
      * If a newer version is available, we show the update notification.
      *
-     * @param application    The application
      * @param versionName    Name of new version
      * @param apkLocationUrl Url with the new apk
      * @param versionCode    Code of new version
      */
-    private static void compareAppVersionAndShowNotification(@NonNull final Application application,
-                                                             final String versionName,
-                                                             final String apkLocationUrl,
-                                                             final int versionCode) {
+    private static void compareAppVersionAndShowNotification(final String versionName,
+                                                            final String apkLocationUrl,
+                                                            final int versionCode) {
         if (BuildConfig.VERSION_CODE >= versionCode) {
             return;
         }
 
+        final App app = App.getApp();
         // A pending intent to open the apk location url in the browser.
         final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(apkLocationUrl));
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-        final PendingIntent pendingIntent
-                = PendingIntent.getActivity(application, 0, intent, 0);
+        final PendingIntent pendingIntent = PendingIntent.getActivity(app, 0, intent, 0);
 
-        final String channelId = application
-                .getString(R.string.app_update_notification_channel_id);
+        final String channelId = app.getString(R.string.app_update_notification_channel_id);
         final NotificationCompat.Builder notificationBuilder
-                = new NotificationCompat.Builder(application, channelId)
+                = new NotificationCompat.Builder(app, channelId)
                 .setSmallIcon(R.drawable.ic_newpipe_update)
                 .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
                 .setContentIntent(pendingIntent)
                 .setAutoCancel(true)
-                .setContentTitle(application
-                        .getString(R.string.app_update_notification_content_title))
-                .setContentText(application
-                        .getString(R.string.app_update_notification_content_text)
+                .setContentTitle(app.getString(R.string.app_update_notification_content_title))
+                .setContentText(app.getString(R.string.app_update_notification_content_text)
                         + " " + versionName);
 
         final NotificationManagerCompat notificationManager
-                = NotificationManagerCompat.from(application);
+                = NotificationManagerCompat.from(app);
         notificationManager.notify(2000, notificationBuilder.build());
     }
 
-    public static boolean isReleaseApk(@NonNull final App app) {
-        return getCertificateSHA1Fingerprint(app).equals(RELEASE_CERT_PUBLIC_KEY_SHA1);
-    }
-
     private void checkNewVersion() throws IOException, ReCaptchaException {
         final App app = App.getApp();
 
@@ -168,7 +76,7 @@ public final class CheckForNewAppVersion extends IntentService {
         final NewVersionManager manager = new NewVersionManager();
 
         // Check if the current apk is a github one or not.
-        if (!isReleaseApk(app)) {
+        if (!ReleaseVersionUtil.isReleaseApk()) {
             return;
         }
 
@@ -181,13 +89,13 @@ public final class CheckForNewAppVersion extends IntentService {
 
         // Make a network request to get latest NewPipe data.
         final Response response = DownloaderImpl.getInstance().get(NEWPIPE_API_URL);
-        handleResponse(response, manager, prefs, app);
+        handleResponse(response, manager);
     }
 
     private void handleResponse(@NonNull final Response response,
-                                @NonNull final NewVersionManager manager,
-                                @NonNull final SharedPreferences prefs,
-                                @NonNull final App app) {
+                                @NonNull final NewVersionManager manager) {
+        final App app = App.getApp();
+        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(app);
         try {
             // Store a timestamp which needs to be exceeded,
             // before a new request to the API is made.
@@ -209,14 +117,11 @@ public final class CheckForNewAppVersion extends IntentService {
                     .from(response.responseBody()).getObject("flavors")
                     .getObject("github").getObject("stable");
 
-            final String versionName = githubStableObject
-                    .getString("version");
-            final int versionCode = githubStableObject
-                    .getInt("version_code");
-            final String apkLocationUrl = githubStableObject
-                    .getString("apk");
+            final String versionName = githubStableObject.getString("version");
+            final int versionCode = githubStableObject.getInt("version_code");
+            final String apkLocationUrl = githubStableObject.getString("apk");
 
-            compareAppVersionAndShowNotification(app, versionName,
+            compareAppVersionAndShowNotification(versionName,
                     apkLocationUrl, versionCode);
         } catch (final JsonParserException e) {
             // Most likely something is wrong in data received from NEWPIPE_API_URL.

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -20,7 +20,6 @@
 
 package org.schabi.newpipe;
 
-import static org.schabi.newpipe.CheckForNewAppVersion.startNewVersionCheckService;
 import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
 import android.content.BroadcastReceiver;
@@ -177,7 +176,7 @@ public class MainActivity extends AppCompatActivity {
             // Start the service which is checking all conditions
             // and eventually searching for a new version.
             // The service searching for a new NewPipe version must not be started in background.
-            startNewVersionCheckService();
+            CheckForNewAppVersion.startNewVersionCheckService();
         }
     }
 

app/src/main/java/org/schabi/newpipe/settings/MainSettingsFragment.java

@@ -7,10 +7,9 @@ import android.view.MenuItem;
 
 import androidx.annotation.NonNull;
 
-import org.schabi.newpipe.App;
-import org.schabi.newpipe.CheckForNewAppVersion;
 import org.schabi.newpipe.MainActivity;
 import org.schabi.newpipe.R;
+import org.schabi.newpipe.util.ReleaseVersionUtil;
 
 public class MainSettingsFragment extends BasePreferenceFragment {
     public static final boolean DEBUG = MainActivity.DEBUG;
@@ -24,7 +23,7 @@ public class MainSettingsFragment extends BasePreferenceFragment {
         setHasOptionsMenu(true); // Otherwise onCreateOptionsMenu is not called
 
         // Check if the app is updatable
-        if (!CheckForNewAppVersion.isReleaseApk(App.getApp())) {
+        if (!ReleaseVersionUtil.isReleaseApk()) {
             getPreferenceScreen().removePreference(
                     findPreference(getString(R.string.update_pref_screen_key)));
 

app/src/main/java/org/schabi/newpipe/settings/SettingsActivity.java

@@ -23,8 +23,6 @@ import androidx.preference.PreferenceFragmentCompat;
 
 import com.jakewharton.rxbinding4.widget.RxTextView;
 
-import org.schabi.newpipe.App;
-import org.schabi.newpipe.CheckForNewAppVersion;
 import org.schabi.newpipe.MainActivity;
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.databinding.SettingsLayoutBinding;
@@ -37,6 +35,7 @@ import org.schabi.newpipe.settings.preferencesearch.PreferenceSearchResultListen
 import org.schabi.newpipe.settings.preferencesearch.PreferenceSearcher;
 import org.schabi.newpipe.util.DeviceUtils;
 import org.schabi.newpipe.util.KeyboardUtil;
+import org.schabi.newpipe.util.ReleaseVersionUtil;
 import org.schabi.newpipe.util.ThemeHelper;
 import org.schabi.newpipe.views.FocusOverlayView;
 
@@ -267,7 +266,7 @@ public class SettingsActivity extends AppCompatActivity implements
      */
     private void ensureSearchRepresentsApplicationState() {
         // Check if the update settings are available
-        if (!CheckForNewAppVersion.isReleaseApk(App.getApp())) {
+        if (!ReleaseVersionUtil.isReleaseApk()) {
             SettingsResourceRegistry.getInstance()
                     .getEntryByPreferencesResId(R.xml.update_settings)
                     .setSearchable(false);

app/src/main/java/org/schabi/newpipe/util/ReleaseVersionUtil.java

@@ -0,0 +1,96 @@
+package org.schabi.newpipe.util;
+
+import android.content.pm.PackageManager;
+import android.content.pm.Signature;
+
+import androidx.annotation.NonNull;
+import androidx.core.content.pm.PackageInfoCompat;
+
+import org.schabi.newpipe.App;
+import org.schabi.newpipe.error.ErrorInfo;
+import org.schabi.newpipe.error.ErrorUtil;
+import org.schabi.newpipe.error.UserAction;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+import java.util.List;
+
+public class ReleaseVersionUtil {
+    // Public key of the certificate that is used in NewPipe release versions
+    private static final String RELEASE_CERT_PUBLIC_KEY_SHA1
+            = "B0:2E:90:7C:1C:D6:FC:57:C3:35:F0:88:D0:8F:50:5F:94:E4:D2:15";
+
+    public static boolean isReleaseApk() {
+        return getCertificateSHA1Fingerprint().equals(RELEASE_CERT_PUBLIC_KEY_SHA1);
+    }
+
+    /**
+     * Method to get the APK's SHA1 key. See https://stackoverflow.com/questions/9293019/#22506133.
+     *
+     * @return String with the APK's SHA1 fingerprint in hexadecimal
+     */
+    @NonNull
+    private static String getCertificateSHA1Fingerprint() {
+        final App app = App.getApp();
+        final List<Signature> signatures;
+        try {
+            signatures = PackageInfoCompat.getSignatures(app.getPackageManager(),
+                    app.getPackageName());
+        } catch (final PackageManager.NameNotFoundException e) {
+            ErrorUtil.createNotification(app, new ErrorInfo(e,
+                    UserAction.CHECK_FOR_NEW_APP_VERSION, "Could not find package info"));
+            return "";
+        }
+        if (signatures.isEmpty()) {
+            return "";
+        }
+
+        final X509Certificate c;
+        try {
+            final byte[] cert = signatures.get(0).toByteArray();
+            final InputStream input = new ByteArrayInputStream(cert);
+            final CertificateFactory cf = CertificateFactory.getInstance("X509");
+            c = (X509Certificate) cf.generateCertificate(input);
+        } catch (final CertificateException e) {
+            ErrorUtil.createNotification(app, new ErrorInfo(e,
+                    UserAction.CHECK_FOR_NEW_APP_VERSION, "Certificate error"));
+            return "";
+        }
+
+        try {
+            final MessageDigest md = MessageDigest.getInstance("SHA1");
+            final byte[] publicKey = md.digest(c.getEncoded());
+            return byte2HexFormatted(publicKey);
+        } catch (NoSuchAlgorithmException | CertificateEncodingException e) {
+            ErrorUtil.createNotification(app, new ErrorInfo(e,
+                    UserAction.CHECK_FOR_NEW_APP_VERSION, "Could not retrieve SHA1 key"));
+            return "";
+        }
+    }
+
+    private static String byte2HexFormatted(final byte[] arr) {
+        final StringBuilder str = new StringBuilder(arr.length * 2);
+
+        for (int i = 0; i < arr.length; i++) {
+            String h = Integer.toHexString(arr[i]);
+            final int l = h.length();
+            if (l == 1) {
+                h = "0" + h;
+            }
+            if (l > 2) {
+                h = h.substring(l - 2, l);
+            }
+            str.append(h.toUpperCase());
+            if (i < (arr.length - 1)) {
+                str.append(':');
+            }
+        }
+        return str.toString();
+    }
+}