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runtime_lua_context.go
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/
runtime_lua_context.go
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// Copyright 2018 The Nakama Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"fmt"
"github.com/yuin/gopher-lua"
)
const (
__RUNTIME_LUA_CTX_ENV = "env"
__RUNTIME_LUA_CTX_MODE = "execution_mode"
__RUNTIME_LUA_CTX_QUERY_PARAMS = "query_params"
__RUNTIME_LUA_CTX_USER_ID = "user_id"
__RUNTIME_LUA_CTX_USERNAME = "username"
__RUNTIME_LUA_CTX_USER_SESSION_EXP = "user_session_exp"
__RUNTIME_LUA_CTX_SESSION_ID = "session_id"
__RUNTIME_LUA_CTX_CLIENT_IP = "client_ip"
__RUNTIME_LUA_CTX_CLIENT_PORT = "client_port"
__RUNTIME_LUA_CTX_MATCH_ID = "match_id"
__RUNTIME_LUA_CTX_MATCH_NODE = "match_node"
__RUNTIME_LUA_CTX_MATCH_LABEL = "match_label"
__RUNTIME_LUA_CTX_MATCH_TICK_RATE = "match_tick_rate"
)
func NewRuntimeLuaContext(l *lua.LState, env *lua.LTable, mode RuntimeExecutionMode, queryParams map[string][]string, sessionExpiry int64, userID, username, sessionID, clientIP, clientPort string) *lua.LTable {
size := 3
if userID != "" {
size += 3
if sessionID != "" {
size++
}
}
if clientIP != "" {
size++
}
if clientPort != "" {
size++
}
lt := l.CreateTable(0, size)
lt.RawSetString(__RUNTIME_LUA_CTX_ENV, env)
lt.RawSetString(__RUNTIME_LUA_CTX_MODE, lua.LString(mode.String()))
if queryParams == nil {
lt.RawSetString(__RUNTIME_LUA_CTX_QUERY_PARAMS, l.CreateTable(0, 0))
} else {
lt.RawSetString(__RUNTIME_LUA_CTX_QUERY_PARAMS, RuntimeLuaConvertValue(l, queryParams))
}
if userID != "" {
lt.RawSetString(__RUNTIME_LUA_CTX_USER_ID, lua.LString(userID))
lt.RawSetString(__RUNTIME_LUA_CTX_USERNAME, lua.LString(username))
lt.RawSetString(__RUNTIME_LUA_CTX_USER_SESSION_EXP, lua.LNumber(sessionExpiry))
if sessionID != "" {
lt.RawSetString(__RUNTIME_LUA_CTX_SESSION_ID, lua.LString(sessionID))
}
}
if clientIP != "" {
lt.RawSetString(__RUNTIME_LUA_CTX_CLIENT_IP, lua.LString(clientIP))
}
if clientPort != "" {
lt.RawSetString(__RUNTIME_LUA_CTX_CLIENT_PORT, lua.LString(clientPort))
}
return lt
}
func RuntimeLuaConvertMapString(l *lua.LState, data map[string]string) *lua.LTable {
lt := l.CreateTable(0, len(data))
for k, v := range data {
lt.RawSetString(k, RuntimeLuaConvertValue(l, v))
}
return lt
}
func RuntimeLuaConvertMap(l *lua.LState, data map[string]interface{}) *lua.LTable {
lt := l.CreateTable(0, len(data))
for k, v := range data {
lt.RawSetString(k, RuntimeLuaConvertValue(l, v))
}
return lt
}
func RuntimeLuaConvertLuaTable(lv *lua.LTable) map[string]interface{} {
returnData, _ := RuntimeLuaConvertLuaValue(lv).(map[string]interface{})
return returnData
}
func RuntimeLuaConvertValue(l *lua.LState, val interface{}) lua.LValue {
if val == nil {
return lua.LNil
}
// Types looked up from:
// https://golang.org/pkg/encoding/json/#Unmarshal
// https://developers.google.com/protocol-buffers/docs/proto3#scalar
switch v := val.(type) {
case bool:
return lua.LBool(v)
case string:
return lua.LString(v)
case []byte:
return lua.LString(v)
case float32:
return lua.LNumber(v)
case float64:
return lua.LNumber(v)
case int:
return lua.LNumber(v)
case int32:
return lua.LNumber(v)
case int64:
return lua.LNumber(v)
case uint32:
return lua.LNumber(v)
case uint64:
return lua.LNumber(v)
case map[string][]string:
lt := l.CreateTable(0, len(v))
for k, v := range v {
lt.RawSetString(k, RuntimeLuaConvertValue(l, v))
}
return lt
case map[string]string:
return RuntimeLuaConvertMapString(l, v)
case map[string]interface{}:
return RuntimeLuaConvertMap(l, v)
case []string:
lt := l.CreateTable(len(val.([]string)), 0)
for k, v := range v {
lt.RawSetInt(k+1, lua.LString(v))
}
return lt
case []interface{}:
lt := l.CreateTable(len(val.([]interface{})), 0)
for k, v := range v {
lt.RawSetInt(k+1, RuntimeLuaConvertValue(l, v))
}
return lt
default:
return nil
}
}
func RuntimeLuaConvertLuaValue(lv lua.LValue) interface{} {
// Taken from: https://github.com/yuin/gluamapper/blob/master/gluamapper.go#L79
switch v := lv.(type) {
case *lua.LNilType:
return nil
case lua.LBool:
return bool(v)
case lua.LString:
return string(v)
case lua.LNumber:
return float64(v)
case *lua.LTable:
maxn := v.MaxN()
if maxn == 0 {
// Table.
ret := make(map[string]interface{})
v.ForEach(func(key, value lua.LValue) {
keyStr := fmt.Sprint(RuntimeLuaConvertLuaValue(key))
ret[keyStr] = RuntimeLuaConvertLuaValue(value)
})
return ret
} else {
// Array.
ret := make([]interface{}, 0, maxn)
for i := 1; i <= maxn; i++ {
ret = append(ret, RuntimeLuaConvertLuaValue(v.RawGetInt(i)))
}
return ret
}
default:
return v
}
}