Load uploaderUrl when showing Channel Details from Play Queue

This checks if the uploaderUrl is in the database, if not it gets the
uploaderUrl and puts it in the database. This is similar to the fetching
of uploaderUrl when it doesn't exist done in TeamNewPipe#6919.

Also use createNotification when error occurs in getStreamInfo.

Author: ktprograms

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

@@ -14,6 +14,7 @@
 import org.schabi.newpipe.player.playqueue.PlayQueue;
 import org.schabi.newpipe.player.playqueue.PlayQueueItem;
 import org.schabi.newpipe.util.NavigationHelper;
+import org.schabi.newpipe.util.SaveUploaderUrlHelper;
 
 import java.util.Collections;
 
@@ -61,11 +62,13 @@ public static void openPopupMenu(final PlayQueue playQueue,
 
                     return true;
                 case R.id.menu_item_channel_details:
-                    // An intent must be used here.
-                    // Opening with FragmentManager transactions is not working,
-                    // as PlayQueueActivity doesn't use fragments.
-                    NavigationHelper.openChannelFragmentUsingIntent(context, item.getServiceId(),
-                            item.getUploaderUrl(), item.getUploader());
+                    SaveUploaderUrlHelper.saveUploaderUrlIfNeeded(context, item,
+                            // An intent must be used here.
+                            // Opening with FragmentManager transactions is not working,
+                            // as PlayQueueActivity doesn't use fragments.
+                            uploaderUrl -> NavigationHelper.openChannelFragmentUsingIntent(
+                                    context, item.getServiceId(), uploaderUrl, item.getUploader()
+                            ));
                     return true;
                 case R.id.menu_item_share:
                     shareText(context, item.getTitle(), item.getUrl(),

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

@@ -0,0 +1,84 @@
+package org.schabi.newpipe.util;
+
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
+import android.content.Context;
+import android.widget.Toast;
+
+import androidx.fragment.app.Fragment;
+
+import org.schabi.newpipe.NewPipeDatabase;
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.error.ErrorInfo;
+import org.schabi.newpipe.error.ErrorUtil;
+import org.schabi.newpipe.error.UserAction;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
+import org.schabi.newpipe.player.playqueue.PlayQueueItem;
+
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.schedulers.Schedulers;
+
+/**
+ * Utility class for putting the uploader url into the database - when required.
+ */
+public final class SaveUploaderUrlHelper {
+    private SaveUploaderUrlHelper() {
+    }
+
+    // Public functions which call the function that does
+    // the actual work with the correct parameters
+    public static void saveUploaderUrlIfNeeded(final Fragment fragment,
+                                               final StreamInfoItem infoItem,
+                                               final SaveUploaderUrlCallback callback) {
+        saveUploaderUrlIfNeeded(fragment.requireContext(),
+                infoItem.getServiceId(),
+                infoItem.getUrl(),
+                infoItem.getUploaderUrl(),
+                callback);
+    }
+    public static void saveUploaderUrlIfNeeded(final Context context,
+                                               final PlayQueueItem queueItem,
+                                               final SaveUploaderUrlCallback callback) {
+        saveUploaderUrlIfNeeded(context,
+                queueItem.getServiceId(),
+                queueItem.getUrl(),
+                queueItem.getUploaderUrl(),
+                callback);
+    }
+
+    /**
+     * Fetches and saves the uploaderUrl if it is empty (meaning that it does
+     * not exist in the video item). The callback is called with either the
+     * fetched uploaderUrl, or the already saved uploaderUrl, but it is always
+     * called with a valid uploaderUrl that can be used to show channel details.
+     */
+    private static void saveUploaderUrlIfNeeded(final Context context,
+                                         final int serviceId,
+                                         final String url,
+                                         // Only used if not null or empty
+                                         final String uploaderUrl,
+                                         final SaveUploaderUrlCallback callback) {
+        if (isNullOrEmpty(uploaderUrl)) {
+            Toast.makeText(context, R.string.loading_channel_details,
+                    Toast.LENGTH_SHORT).show();
+            ExtractorHelper.getStreamInfo(serviceId, url, false)
+                    .subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(result -> {
+                        NewPipeDatabase.getInstance(context).streamDAO()
+                                .setUploaderUrl(serviceId, url, result.getUploaderUrl())
+                                .subscribeOn(Schedulers.io()).subscribe();
+                        callback.onCallback(result.getUploaderUrl());
+                    }, throwable -> ErrorUtil.createNotification(context,
+                            new ErrorInfo(throwable, UserAction.REQUESTED_CHANNEL,
+                                    "Could not load channel details")
+                    ));
+        } else {
+            callback.onCallback(uploaderUrl);
+        }
+    }
+
+    public interface SaveUploaderUrlCallback {
+        void onCallback(String uploaderUrl);
+    }
+}

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

@@ -3,12 +3,10 @@
 import android.content.Context;
 import android.net.Uri;
 import android.util.Log;
-import android.widget.Toast;
 
 import androidx.fragment.app.Fragment;
 import androidx.preference.PreferenceManager;
 
-import org.schabi.newpipe.NewPipeDatabase;
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.database.stream.model.StreamEntity;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
@@ -27,36 +25,14 @@
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
 import io.reactivex.rxjava3.schedulers.Schedulers;
 
-import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
-
 public enum StreamDialogEntry {
     //////////////////////////////////////
     // enum values with DEFAULT actions //
     //////////////////////////////////////
 
     show_channel_details(R.string.show_channel_details, (fragment, item) -> {
-        if (isNullOrEmpty(item.getUploaderUrl())) {
-            final int serviceId = item.getServiceId();
-            final String url = item.getUrl();
-            Toast.makeText(fragment.getContext(), R.string.loading_channel_details,
-                    Toast.LENGTH_SHORT).show();
-            ExtractorHelper.getStreamInfo(serviceId, url, false)
-                    .subscribeOn(Schedulers.io())
-                    .observeOn(AndroidSchedulers.mainThread())
-                    .subscribe(result -> {
-                        NewPipeDatabase.getInstance(fragment.requireContext()).streamDAO()
-                                .setUploaderUrl(serviceId, url, result.getUploaderUrl())
-                                .subscribeOn(Schedulers.io()).subscribe();
-                        openChannelFragment(fragment, item, result.getUploaderUrl());
-                    }, throwable -> Toast.makeText(
-                            // TODO: Open the Error Activity
-                            fragment.getContext(),
-                            R.string.error_show_channel_details,
-                            Toast.LENGTH_SHORT
-                    ).show());
-        } else {
-            openChannelFragment(fragment, item, item.getUploaderUrl());
-        }
+        SaveUploaderUrlHelper.saveUploaderUrlIfNeeded(fragment, item,
+                uploaderUrl -> openChannelFragment(fragment, item, uploaderUrl));
     }),
 
     /**