Add 'minetest.write_json'

2 files changed, 30 insertions, 0 deletions

diff --git a/src/script/lua_api/l_util.cpp b/src/script/lua_api/l_util.cpp
index fe10e4f57..9fa6fcb77 100644
--- a/src/script/lua_api/l_util.cpp
+++ b/src/script/lua_api/l_util.cpp
@@ -179,6 +179,32 @@ int ModApiUtil::l_parse_json(lua_State *L)
 	return 1;
 }
 
+// write_json(data[, styled]) -> string
+int ModApiUtil::l_write_json(lua_State *L)
+{
+	NO_MAP_LOCK_REQUIRED;
+
+	bool styled = false;
+	if (!lua_isnone(L, 2)) {
+		styled = lua_toboolean(L, 2);
+		lua_pop(L, 1);
+	}
+
+	Json::Value root;
+	get_json_value(L, root, 1);
+
+	std::string out;
+	if (styled) {
+		Json::StyledWriter writer;
+		out = writer.write(root);
+	} else {
+		Json::FastWriter writer;
+		out = writer.write(root);
+	}
+	lua_pushlstring(L, out.c_str(), out.size());
+	return 1;
+}
+
 // get_dig_params(groups, tool_capabilities[, time_from_last_punch])
 int ModApiUtil::l_get_dig_params(lua_State *L)
 {
@@ -249,6 +275,7 @@ void ModApiUtil::Initialize(lua_State *L, int top)
 	API_FCT(setting_save);
 
 	API_FCT(parse_json);
+	API_FCT(write_json);
 
 	API_FCT(get_dig_params);
 	API_FCT(get_hit_params);
diff --git a/src/script/lua_api/l_util.h b/src/script/lua_api/l_util.h
index d91c880cf..13357587a 100644
--- a/src/script/lua_api/l_util.h
+++ b/src/script/lua_api/l_util.h
@@ -64,6 +64,9 @@ private:
 	// parse_json(str[, nullvalue])
 	static int l_parse_json(lua_State *L);
 
+	// write_json(data[, styled])
+	static int l_write_json(lua_State *L);
+
 	// get_dig_params(groups, tool_capabilities[, time_from_last_punch])
 	static int l_get_dig_params(lua_State *L);