Detect version + automatically clear cache if the version changed

app/src/main/AndroidManifest.xml

@@ -7,7 +7,6 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
     <application

app/src/main/java/app/fedilab/mobilizon/MainActivity.java

@@ -36,16 +36,15 @@ import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 
 import com.google.android.material.navigation.NavigationView;
+import com.google.android.material.snackbar.Snackbar;
 import com.karumi.dexter.Dexter;
-import com.karumi.dexter.MultiplePermissionsReport;
-import com.karumi.dexter.PermissionToken;
-import com.karumi.dexter.listener.PermissionRequest;
 import com.karumi.dexter.listener.multi.MultiplePermissionsListener;
+import com.karumi.dexter.listener.multi.SnackbarOnAnyDeniedMultiplePermissionsListener;
 
+import java.io.File;
 import java.io.UnsupportedEncodingException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
-import java.util.List;
 
 import app.fedilab.mobilizon.client.RetrofitMobilizonAPI;
 import app.fedilab.mobilizon.client.entities.WellKnownNodeinfo;
@@ -97,7 +96,7 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
         webview_container = findViewById(R.id.webview_container);
         final ViewGroup videoLayout = findViewById(R.id.videoLayout);
         String instance = Helper.getLiveInstance(MainActivity.this);
-        Helper.initializeWebview(MainActivity.this, main_webview);
+        Helper.initializeWebview(MainActivity.this, main_webview, instance);
         MobilizonWebChromeClient mobilizonWebChromeClient = new MobilizonWebChromeClient(MainActivity.this, main_webview, webview_container, videoLayout);
         main_webview.setWebChromeClient(mobilizonWebChromeClient);
         main_webview.setWebViewClient(new MobilizonWebViewClient(MainActivity.this));
@@ -105,20 +104,60 @@ public class MainActivity extends AppCompatActivity implements NavigationView.On
         showProgressDialog();
         main_webview.loadUrl("https://" + instance);
 
+        MultiplePermissionsListener snackbarMultiplePermissionsListener =
+                SnackbarOnAnyDeniedMultiplePermissionsListener.Builder
+                        .with(main_webview, R.string.permissions_message)
+                        .withOpenSettingsButton(R.string.settings)
+                        .withCallback(new Snackbar.Callback() {
+                            @Override
+                            public void onShown(Snackbar snackbar) {
+                                // Event handler for when the given Snackbar is visible
+                            }
+                            @Override
+                            public void onDismissed(Snackbar snackbar, int event) {
+                                // Event handler for when the given Snackbar has been dismissed
+                            }
+                        })
+                        .build();
         Dexter.withContext(this)
                 .withPermissions(
-                        Manifest.permission.WRITE_EXTERNAL_STORAGE,
                         Manifest.permission.ACCESS_COARSE_LOCATION,
                         Manifest.permission.ACCESS_FINE_LOCATION
                 )
-                .withListener(new MultiplePermissionsListener() {
+                .withListener(snackbarMultiplePermissionsListener).check();
-                    @Override
-                    public void onPermissionsChecked(MultiplePermissionsReport report) {/* ... */}
 
-                    @Override
+        new Thread(() -> {
-                    public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {/* ... */}
+            try {
-                }).check();
+                WellKnownNodeinfo.NodeInfo instanceNodeInfo = new RetrofitMobilizonAPI(instance).getNodeInfo();
+                if (instanceNodeInfo.getSoftware() != null && instanceNodeInfo.getSoftware().getName().trim().toLowerCase().compareTo("mobilizon") == 0) {
+                    runOnUiThread(() -> {
+                        final SharedPreferences sharedpreferences = getSharedPreferences(Helper.APP_PREFS, Context.MODE_PRIVATE);
+                        String previousVersion = sharedpreferences.getString(Helper.PREF_VERSION+instance, null);
+                        if( previousVersion != null && previousVersion.trim().compareTo(instanceNodeInfo.getSoftware().getVersion()) != 0) {
+                            SharedPreferences.Editor editor = sharedpreferences.edit();
+                            editor.putString(Helper.PREF_VERSION + instance.trim(), instanceNodeInfo.getSoftware().getVersion().trim());
+                            editor.apply();
+                            File dir = new File(getFilesDir().getPath()+"/" + instance);
+                            if (dir.isDirectory()) {
+                                String[] children = dir.list();
+                                if( children != null) {
+                                    for (String child : children) {
+                                        //noinspection ResultOfMethodCallIgnored
+                                        new File(dir, child).delete();
+                                    }
+                                }
+                            }
+                            main_webview.reload();
+                        }else if(previousVersion == null) {
+                            SharedPreferences.Editor editor = sharedpreferences.edit();
+                            editor.putString(Helper.PREF_VERSION + instance.trim(), instanceNodeInfo.getSoftware().getVersion().trim());
+                            editor.apply();
+                        }
+                    });
+                }
+            } catch (Exception ignored) {}
 
+        }).start();
 
     }
 

app/src/main/java/app/fedilab/mobilizon/helper/Helper.java

@@ -29,9 +29,11 @@ import java.io.InputStream;
  * see <http://www.gnu.org/licenses>. */
 public class Helper {
 
+    @SuppressWarnings("unused")
+    public static final String TAG = "mobilizon_app";
     public static final String APP_PREFS = "app_prefs";
     public static final String PREF_INSTANCE = "instance";
-
+    public static final String PREF_VERSION = "version_";
     /**
      * Returns the preferred instance
      *
@@ -50,7 +52,7 @@ public class Helper {
      * @param webView WebView
      */
     @SuppressLint("SetJavaScriptEnabled")
-    public static void initializeWebview(Context context, WebView webView) {
+    public static void initializeWebview(Context context, WebView webView, String instance) {
 
         webView.getSettings().setJavaScriptEnabled(true);
         webView.getSettings().setUseWideViewPort(true);
@@ -60,7 +62,7 @@ public class Helper {
         webView.getSettings().setBuiltInZoomControls(true);
         webView.getSettings().setLoadsImagesAutomatically(true);
         webView.getSettings().setSupportMultipleWindows(false);
-        webView.getSettings().setGeolocationDatabasePath(context.getFilesDir().getPath());
+        webView.getSettings().setGeolocationDatabasePath(context.getFilesDir().getPath()+"/" + instance);
         webView.getSettings().setGeolocationEnabled(true);
         webView.getSettings().setAppCachePath(context.getCacheDir().getPath());
         webView.getSettings().setAppCacheEnabled(true);

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

@@ -37,4 +37,6 @@
     <string name="terms">Terms</string>
     <string name="license">License</string>
     <string name="about_the_app">About the app (Release %1$s)</string>
+    <string name="permissions_message">This permission is used for searching events next to your location.</string>
+    <string name="settings">Settings</string>
 </resources>