Add flag option "null_to_table" to convert null values to table in wdata.write

api.lua

@@ -58,6 +58,7 @@ end
 --
 --  @table FlagsDef
 --  @tfield[opt] bool styled Outputs in a human-readable format if this is set (default: `true`).
+--  @tfield[opt] bool null_to_table "null" values will be converted to tables in output (default: `false`).
 
 
 --- Writes to config file in world directory.
@@ -97,6 +98,14 @@ function wdata.write(fname, data, flags)
 		end
 	end
 
+	if flags.null_to_table then
+		if flags.styled then
+			json_data = json_data:gsub(": null([,\n])", ": {}%1")
+		else
+			json_data = json_data:gsub(":null([,%]}])", ":{}%1")
+		end
+	end
+
 	return core.safe_file_write(fpath, json_data)
 end
 

changelog.txt

@@ -2,6 +2,7 @@
 next
 ----
 - changed wdata.write method to take table parameter "flags" instead of boolean "styled"
+- added flag option "null_to_table" for wdata.write that converts null values to tables
 
 
 v1.1