Add single delete API

app/src/main/java/gallery/memories/NativeX.java

@@ -2,7 +2,6 @@ package gallery.memories;
 
 import static android.view.WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS;
 
-import android.app.Activity;
 import android.app.DownloadManager;
 import android.content.Context;
 import android.graphics.Color;
@@ -16,6 +15,7 @@ import android.webkit.WebResourceRequest;
 import android.webkit.WebResourceResponse;
 import android.webkit.WebView;
 
+import androidx.appcompat.app.AppCompatActivity;
 import androidx.collection.ArrayMap;
 
 import java.io.ByteArrayInputStream;
@@ -26,13 +26,13 @@ import gallery.memories.service.TimelineQuery;
 
 public class NativeX {
     public static final String TAG = "NativeX";
-    Activity mActivity;
+    AppCompatActivity mActivity;
     WebView mWebView;
 
     protected ImageService mImageService;
     protected TimelineQuery mQuery;
 
-    public NativeX(Activity activity, WebView webView) {
+    public NativeX(AppCompatActivity activity, WebView webView) {
         mActivity = activity;
         mWebView = webView;
         mImageService = new ImageService(activity);
@@ -112,8 +112,10 @@ public class NativeX {
             return makeResponse(mImageService.getPreview(Long.parseLong(parts[3])), "image/jpeg");
         } else if (path.matches("^/image/full/\\d+$")) {
             return makeResponse(mImageService.getFull(Long.parseLong(parts[3])), "image/jpeg");
-        }  else if (path.matches("^/image/info/\\d+$")) {
-            return makeResponse(mQuery.getImageInfo(Long.parseLong(parts[3])));
+        } else if (path.matches("^/api/image/info/\\d+$")) {
+            return makeResponse(mQuery.getImageInfo(Long.parseLong(parts[4])));
+        } else if (path.matches("^/api/image/delete/\\d+$")) {
+            return makeResponse(mQuery.delete(Long.parseLong(parts[4])));
         } else if (path.matches("^/api/days$")) {
             return makeResponse(mQuery.getDays());
         } else if (path.matches("/api/days/\\d+$")) {

app/src/main/java/gallery/memories/service/TimelineQuery.java

@@ -1,14 +1,22 @@
 package gallery.memories.service;
 
-import android.content.Context;
+import android.app.Activity;
+import android.app.PendingIntent;
+import android.content.ContentUris;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.icu.text.SimpleDateFormat;
 import android.net.Uri;
+import android.os.Build;
 import android.provider.MediaStore;
 import android.text.TextUtils;
 import android.util.Log;
 
+import androidx.activity.result.ActivityResult;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.IntentSenderRequest;
+import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.appcompat.app.AppCompatActivity;
 import androidx.collection.ArraySet;
 import androidx.exifinterface.media.ExifInterface;
 
@@ -19,19 +27,31 @@ import org.json.JSONObject;
 import java.io.IOException;
 import java.text.ParseException;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 
 public class TimelineQuery {
     final static String TAG = "TimelineQuery";
-    Context mCtx;
+    AppCompatActivity mCtx;
     SQLiteDatabase mDb;
 
-    public TimelineQuery(Context context) {
+    boolean deleting = false;
+    ActivityResultLauncher<IntentSenderRequest> deleteIntentLauncher;
+    ActivityResult deleteResult;
+
+    public TimelineQuery(AppCompatActivity context) {
         mCtx = context;
         mDb = new DbService(context).getWritableDatabase();
 
+        deleteIntentLauncher = mCtx.registerForActivityResult(new ActivityResultContracts.StartIntentSenderForResult(), result -> {
+            synchronized (deleteIntentLauncher) {
+                deleteResult = result;
+                deleteIntentLauncher.notify();
+            }
+        });
+
         fullSyncDb();
     }
 
@@ -257,6 +277,46 @@ public class TimelineQuery {
         }
     }
 
+    public JSONObject delete(long id) throws Exception {
+        synchronized (this) {
+            if (deleting) {
+                throw new Exception("Already deleting another set of images");
+            }
+            deleting = true;
+        }
+
+        try {
+            // Delete file with media store
+            Uri collection = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+                // Delete with media store
+                Uri uri = ContentUris.withAppendedId(collection, id);
+                PendingIntent intent = MediaStore.createTrashRequest(mCtx.getContentResolver(), Collections.singletonList(uri), true);
+                deleteIntentLauncher.launch(new IntentSenderRequest.Builder(intent.getIntentSender()).build());
+
+                // Wait for response
+                synchronized (deleteIntentLauncher) {
+                    deleteIntentLauncher.wait();
+                }
+
+                // Throw if canceled or failed
+                if (deleteResult.getResultCode() != Activity.RESULT_OK) {
+                    throw new Exception("Delete canceled or failed");
+                }
+            } else {
+                // Delete with media store
+                Uri uri = ContentUris.withAppendedId(collection, id);
+                mCtx.getContentResolver().delete(uri, null, null);
+            }
+
+            return new JSONObject().put("message", "ok");
+        } finally {
+            synchronized (this) {
+                deleting = false;
+            }
+        }
+    }
+
     protected void fullSyncDb() {
         Uri collection = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
 
@@ -332,5 +392,8 @@ public class TimelineQuery {
                 Log.v(TAG, "Inserted file to local DB: " + id + " / " + name + " / " + dayId);
             }
         }
+
+        // Clean up stale files
+        mDb.execSQL("DELETE FROM images WHERE flag = 1");
     }
 }