feat(Spotify): Add Hide Create button patch (#5062)

extensions/spotify/src/main/java/app/revanced/extension/spotify/layout/hide/createbutton/HideCreateButtonPatch.java

@@ -0,0 +1,51 @@
+package app.revanced.extension.spotify.layout.hide.createbutton;
+
+import java.util.List;
+
+import app.revanced.extension.shared.Utils;
+
+@SuppressWarnings("unused")
+public final class HideCreateButtonPatch {
+
+    /**
+     * A list of ids of resources which contain the Create button title.
+     */
+    private static final List<String> CREATE_BUTTON_TITLE_RES_ID_LIST = List.of(
+            Integer.toString(Utils.getResourceIdentifier("navigationbar_musicappitems_create_title", "string"))
+    );
+
+    /**
+     * The old id of the resource which contained the Create button title. Used in older versions of the app.
+     */
+    private static final int OLD_CREATE_BUTTON_TITLE_RES_ID =
+            Utils.getResourceIdentifier("bottom_navigation_bar_create_tab_title", "string");
+
+    /**
+     * Injection point. This method is called on every navigation bar item to check whether it is the Create button.
+     * If the navigation bar item is the Create button, it returns null to erase it.
+     * The method fingerprint used to patch ensures we can safely return null here.
+     */
+    public static Object returnNullIfIsCreateButton(Object navigationBarItem) {
+        if (navigationBarItem == null) {
+            return null;
+        }
+
+        String stringifiedNavigationBarItem = navigationBarItem.toString();
+        boolean isCreateButton = CREATE_BUTTON_TITLE_RES_ID_LIST.stream()
+                .anyMatch(stringifiedNavigationBarItem::contains);
+
+        if (isCreateButton) {
+            return null;
+        }
+
+        return navigationBarItem;
+    }
+
+    /**
+     * Injection point. Called in older versions of the app. Returns whether the old navigation bar item is the old
+     * Create button.
+     */
+    public static boolean isOldCreateButton(int oldNavigationBarItemTitleResId) {
+        return oldNavigationBarItemTitleResId == OLD_CREATE_BUTTON_TITLE_RES_ID;
+    }
+}