add name mapping features to lua client generator (#16511)

bin/configs/lua.yaml

@@ -4,3 +4,5 @@ inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
 templateDir: modules/openapi-generator/src/main/resources/lua
 additionalProperties:
   packageName: petstore
+nameMappings:
+  phone: mobile

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/LuaClientCodegen.java

@@ -239,6 +239,11 @@ public class LuaClientCodegen extends DefaultCodegen implements CodegenConfig {
 
     @Override
     public String toVarName(String name) {
+        // obtain the name from nameMapping directly if provided
+        if (nameMapping.containsKey(name)) {
+            return nameMapping.get(name);
+        }
+
         // replace - with _ e.g. created-at => created_at
         name = sanitizeName(name.replaceAll("-", "_"));
 
@@ -263,6 +268,11 @@ public class LuaClientCodegen extends DefaultCodegen implements CodegenConfig {
 
     @Override
     public String toParamName(String name) {
+        // obtain the name from parameterNameMapping directly if provided
+        if (parameterNameMapping.containsKey(name)) {
+            return parameterNameMapping.get(name);
+        }
+
         return toVarName(name);
     }
 
@@ -273,6 +283,11 @@ public class LuaClientCodegen extends DefaultCodegen implements CodegenConfig {
 
     @Override
     public String toModelFilename(String name) {
+        // obtain the name from modelNameMapping directly if provided
+        if (modelNameMapping.containsKey(name)) {
+            return modelNameMapping.get(name);
+        }
+
         if (!StringUtils.isEmpty(modelNamePrefix)) {
             name = modelNamePrefix + "_" + name;
         }

samples/client/petstore/lua/petstore/model/user.lua

@@ -19,7 +19,7 @@ local function cast_user(t)
 	return setmetatable(t, user_mt)
 end
 
-local function new_user(id, username, first_name, last_name, email, password, phone, user_status)
+local function new_user(id, username, first_name, last_name, email, password, mobile, user_status)
 	return cast_user({
 		["id"] = id;
 		["username"] = username;
@@ -27,7 +27,7 @@ local function new_user(id, username, first_name, last_name, email, password, ph
 		["lastName"] = last_name;
 		["email"] = email;
 		["password"] = password;
-		["phone"] = phone;
+		["phone"] = mobile;
 		["userStatus"] = user_status;
 	})
 end