add: change default avatar

crates/core/src/database/common.rs

@@ -75,6 +75,26 @@ impl DataManager {
 
         Ok(res.unwrap())
     }
+
+    pub async fn get_table_row_count_where(&self, table: &str, r#where: &str) -> Result<i32> {
+        let conn = match self.0.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = query_row!(
+            &conn,
+            &format!("SELECT COUNT(*)::int FROM {} {}", table, r#where),
+            params![],
+            |x| Ok(x.get::<usize, i32>(0))
+        );
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
+        Ok(res.unwrap())
+    }
 }
 
 #[macro_export]