Move lua2go conversion code to separate package

util/code/code.go

@@ -0,0 +1,80 @@
+// Copyright © 2016 Abcum Ltd
+//
+// 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 code
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/yuin/gopher-lua"
+)
+
+func Go2Lua(ctx *lua.LState, value interface{}) lua.LValue {
+	switch v := value.(type) {
+	case bool:
+		return lua.LBool(v)
+	case int64:
+		return lua.LNumber(v)
+	case float64:
+		return lua.LNumber(v)
+	case string:
+		return lua.LString(v)
+	case time.Time:
+		return lua.LNumber(v.Unix())
+	case []interface{}:
+		a := ctx.CreateTable(len(v), 0)
+		for _, item := range v {
+			a.Append(Go2Lua(ctx, item))
+		}
+		return a
+	case map[string]interface{}:
+		m := ctx.CreateTable(0, len(v))
+		for key, item := range v {
+			m.RawSetH(lua.LString(key), Go2Lua(ctx, item))
+		}
+		return m
+	}
+	return lua.LNil
+}
+
+func Lua2Go(value lua.LValue) interface{} {
+	switch v := value.(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:
+		if c := v.MaxN(); c == 0 {
+			m := make(map[string]interface{})
+			v.ForEach(func(key, val lua.LValue) {
+				str := fmt.Sprint(Lua2Go(key))
+				m[str] = Lua2Go(val)
+			})
+			return m
+		} else {
+			a := make([]interface{}, 0, c)
+			for i := 1; i <= c; i++ {
+				a = append(a, Lua2Go(v.RawGetInt(i)))
+			}
+			return a
+		}
+	default:
+		return v
+	}
+}