Allow download on native mobile

android/app/src/main/java/com/compassconnections/app/MainActivity.java

@@ -1,6 +1,7 @@
 package com.compassconnections.app;
 
 import android.Manifest;
+import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.os.Build;
@@ -13,8 +14,10 @@ import android.webkit.WebView;
 import androidx.activity.result.ActivityResultLauncher;
 import androidx.activity.result.contract.ActivityResultContracts;
 import androidx.core.content.ContextCompat;
+import androidx.core.content.FileProvider;
 
 import com.capacitorjs.plugins.pushnotifications.PushNotificationsPlugin;
+import com.compassconnections.app.MainActivity.WebAppInterface;
 import com.getcapacitor.BridgeActivity;
 import com.getcapacitor.BridgeWebViewClient;
 import com.getcapacitor.Plugin;
@@ -29,6 +32,10 @@ import com.google.android.play.core.install.model.UpdateAvailability;
 import org.json.JSONException;
 import org.json.JSONObject;
 
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
 import ee.forgr.capacitor.social.login.GoogleProvider;
 import ee.forgr.capacitor.social.login.ModifiedMainActivityForSocialLoginPlugin;
 import ee.forgr.capacitor.social.login.SocialLoginPlugin;
@@ -57,13 +64,42 @@ public class MainActivity extends BridgeActivity implements ModifiedMainActivity
         }
     }
 
-    public static class NativeBridge {
+    public static class WebAppInterface {
+        private final Context context;
+
+        public WebAppInterface(Context context) {
+            this.context = context;
+        }
+
         @JavascriptInterface
-        public boolean isNativeApp() {
-            return true;
+        public void downloadFile(String filename, String content) {
+            try {
+                // Create file in app-specific external storage
+                File file = new File(context.getExternalFilesDir(null), filename);
+
+                // Write content to file
+                FileOutputStream fos = new FileOutputStream(file);
+                fos.write(content.getBytes());
+                fos.close();
+
+                // Get URI via FileProvider
+                String authority = context.getPackageName() + ".provider";
+                android.net.Uri uri = FileProvider.getUriForFile(context, authority, file);
+
+                // Launch intent to view/share file
+                Intent intent = new Intent(Intent.ACTION_VIEW);
+                intent.setDataAndType(uri, "application/json");
+                intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_ACTIVITY_NEW_TASK);
+
+                context.startActivity(intent);
+
+            } catch (IOException e) {
+                Log.i("CompassApp", "Failed to download file", e);
+            }
         }
     }
 
+
     @Override
     protected void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
@@ -100,7 +136,7 @@ public class MainActivity extends BridgeActivity implements ModifiedMainActivity
         settings.setUserAgentString(settings.getUserAgentString() + " CompassAppWebView");
 
         settings.setJavaScriptEnabled(true);
-        webView.addJavascriptInterface(new NativeBridge(), "AndroidBridge");
+        webView.addJavascriptInterface(new WebAppInterface(this), "AndroidBridge");
 
         registerPlugin(PushNotificationsPlugin.class);
         // Initialize the Bridge with Push Notifications plugin

web/lib/util/webview.ts

@@ -4,7 +4,6 @@ import {IS_WEBVIEW} from "common/hosting/constants";
 export function isAndroidApp() {
   try {
     // Detect if Android bridge exists
-    // return typeof (window as any).AndroidBridge?.isNativeApp === 'function';
     return Capacitor.isNativePlatform() || IS_WEBVIEW
   } catch {
     return false;

web/pages/_document.tsx

@@ -4,6 +4,14 @@ import Script from 'next/script'
 import clsx from "clsx";
 import {IS_DEPLOYED} from "common/hosting/constants";
 
+declare global {
+  interface Window {
+    AndroidBridge?: {
+      downloadFile: (filename: string, content: string) => void
+    }
+  }
+}
+
 export default function Document() {
   return (
     <Html lang="en">

web/pages/settings.tsx

@@ -25,6 +25,7 @@ import HiddenProfilesModal from 'web/components/settings/hidden-profiles-modal'
 import {EmailVerificationButton} from "web/components/email-verification-button";
 import {api} from 'web/lib/api'
 import {useUser} from "web/hooks/use-user";
+import {isNativeMobile} from "web/lib/util/webview";
 
 export default function NotificationsPage() {
   const t = useT()
@@ -209,17 +210,21 @@ const DataPrivacySettings = () => {
     try {
       setIsDownloading(true)
       const data = await api('me/data', {})
-      const blob = new Blob([JSON.stringify(data, null, 2)], {
-        type: 'application/json',
-      })
-      const url = URL.createObjectURL(blob)
-      const link = document.createElement('a')
-      link.href = url
-      link.download = `compass-data-export${user?.username ? `-${user.username}` : ''}.json`
-      document.body.appendChild(link)
-      link.click()
-      document.body.removeChild(link)
-      URL.revokeObjectURL(url)
+      const jsonString = JSON.stringify(data, null, 2)
+      const filename = `compass-data-export${user?.username ? `-${user.username}` : ''}.json`;
+      if (isNativeMobile() && window.AndroidBridge && window.AndroidBridge.downloadFile) {
+        window.AndroidBridge.downloadFile(filename, jsonString)
+      } else {
+        const blob = new Blob([jsonString], {type: 'application/json'})
+        const url = URL.createObjectURL(blob)
+        const link = document.createElement('a')
+        link.href = url
+        link.download = filename
+        document.body.appendChild(link)
+        link.click()
+        document.body.removeChild(link)
+        URL.revokeObjectURL(url)
+      }
       toast.success(
         t(
           'settings.data_privacy.download.success',
@@ -256,4 +261,3 @@ const DataPrivacySettings = () => {
     </div>
   )
 }
-