package sqlutil

import (
	"bytes"
	"fmt"
	"strings"
)

var escapeArray = []string{"\\", "%"}

func LikeFormat(name string) string {
	return "%" + escape(name) + "%"
}

func LeftLikeFormat(name string) string {
	return "%" + escape(name)
}

func RightLikeFormat(name string) string {
	return escape(name) + "%"
}

func escape(name string) string {
	for i := range escapeArray {
		name = strings.ReplaceAll(name, escapeArray[i], "\\"+escapeArray[i])
	}
	return name
}

func OrderByFieldInt(column string, arg ...int) string {
	of := bytes.NewBufferString("FIELD(" + column + ", ")
	for i := range arg {
		if i < len(arg)-1 {
			of.WriteString(fmt.Sprintf("%v, ", arg[i]))
		} else {
			of.WriteString(fmt.Sprintf("%v) ", arg[i]))
		}
	}
	return of.String()
}