默认分组无书籍时自动隐藏

app/src/main/java/io/legado/app/data/dao/BookGroupDao.kt

@@ -2,6 +2,7 @@ package io.legado.app.data.dao
 
 import androidx.lifecycle.LiveData
 import androidx.room.*
+import io.legado.app.constant.BookType
 import io.legado.app.data.entities.BookGroup
 
 @Dao
@@ -16,7 +17,16 @@ interface BookGroupDao {
     @Query("SELECT * FROM book_groups ORDER BY `order`")
     fun liveDataAll(): LiveData<List<BookGroup>>
 
-    @Query("SELECT * FROM book_groups where show > 0 or groupId >= 0 ORDER BY `order`")
+    @Query(
+        """
+        SELECT * FROM book_groups where groupId >= 0 
+        or (groupId = -4 and show > 0 and (select count(bookUrl) from books where ((SELECT sum(groupId) FROM book_groups where groupId > 0) & `group`) = 0 and type != ${BookType.audio} and origin != '${BookType.local}') > 0)
+        or (groupId = -3 and show > 0 and (select count(bookUrl) from books where type = ${BookType.audio}) > 0)
+        or (groupId = -2 and show > 0 and (select count(bookUrl) from books where origin = '${BookType.local}') > 0)
+        or (groupId = -1 and show > 0)
+        ORDER BY `order`
+    """
+    )
     fun liveDataShow(): LiveData<List<BookGroup>>
 
     @Query("SELECT * FROM book_groups where groupId >= 0 ORDER BY `order`")