feat(google-pixel-launcher-url): add ProvidesAssistContent.java

mastodon/src/main/java/org/joinmastodon/android/utils/ProvidesAssistContent.java

@@ -0,0 +1,32 @@
+package org.joinmastodon.android.utils;
+
+import android.app.Fragment;
+import android.app.assist.AssistContent;
+import android.net.Uri;
+
+import org.joinmastodon.android.fragments.HasAccountID;
+
+public interface ProvidesAssistContent {
+	void onProvideAssistContent(AssistContent assistContent);
+
+	default boolean callFragmentToProvideAssistContent(Fragment fragment, AssistContent assistContent) {
+		if (fragment instanceof ProvidesAssistContent assistiveFragment) {
+			assistiveFragment.onProvideAssistContent(assistContent);
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	interface ProvidesWebUri extends ProvidesAssistContent, HasAccountID {
+		Uri getWebUri(Uri.Builder base);
+
+		default Uri.Builder getUriBuilder() {
+			return getSession().getInstanceUri().buildUpon();
+		}
+
+		default void onProvideAssistContent(AssistContent assistContent) {
+			assistContent.setWebUri(getWebUri(getUriBuilder()));
+		}
+	}
+}