package util
import (
"fmt"
"reflect"
"regexp"
"strconv"
"strings"
)
func floatToString(f float64) string {
return strconv.FormatFloat(f, 'E', -1, 64)
}
func intToString(i int64) string {
return strconv.FormatInt(i, 10)
}
func boolToString(b bool) string {
if b {
return "true"
} else {
return "false"
}
}
func toString(arg interface{}) string {
switch arg.(type) {
case bool:
return boolToString(arg.(bool))
case float32:
return floatToString(float64(arg.(float32)))
case float64:
return floatToString(arg.(float64))
//case complex64:
// p.fmtComplex(complex128(f), 64, verb)
//case complex128:
// p.fmtComplex(f, 128, verb)
case int:
return intToString(int64(arg.(int)))
case int8:
return intToString(int64(arg.(int8)))
case int16:
return intToString(int64(arg.(int16)))
case int32:
return intToString(int64(arg.(int32)))
case int64:
return intToString(int64(arg.(int64)))
default:
return fmt.Sprint(arg)
}
}
func combinePath(pre string, path string) string {
if pre != "" && path != "" {
return pre + "." + path
}
return pre + path
}
//将一个map[string]interface打平
func FlatMap(prefix string, mapData map[string]interface{}) map[string]interface{} {
v := reflect.ValueOf(mapData)
res := make(map[string]interface{})
foreachObj(prefix, v, res)
return res
}
func foreachObj(pre string, v reflect.Value, res map[string]interface{}) {
switch v.Kind() {
case reflect.Ptr:
foreachObj(pre, v.Elem(), res)
case reflect.Array, reflect.Slice:
for i := 0; i < v.Len(); i++ {
foreachObj(combinePath(pre, strconv.Itoa(i)), v.Index(i), res)
}
case reflect.Struct:
vType := v.Type()
for i := 0; i < v.NumField(); i++ {
foreachObj(combinePath(pre, vType.Field(i).Name), v.Field(i), res)
}
case reflect.Map:
for _, key := range v.MapKeys() {
foreachObj(combinePath(pre, key.String()), v.MapIndex(key), res)
}
case reflect.Interface:
foreachObj(combinePath(pre, ""), v.Elem(), res)
default: // float, complex, bool, chan, string,int,func, interface
res[pre] = v.Interface()
}
}
func getTplExpressions(str string) []string {
reg_str := `${.*?}`
re, _ := regexp.Compile(reg_str)
all := re.FindAll([]byte(str), 2)
keyArrays := make([]string, 0)
for _, item := range all {
item_str := string(item)
if len(item_str) > 3 {
item_str = item_str[2 : len(item_str)-1]
keyArrays = append(keyArrays, item_str)
}
}
return keyArrays
}
// 将tpl中的占位符 替换为真实值 ${data.0.att1}
func ParseTpl(tpl string, data map[string]interface{}) string {
if len(tpl) < 4 {
return tpl
}
expressions := getTplExpressions(tpl)
data = FlatMap("", data)
for _, exp := range expressions {
//fmt.Println("exp",exp)
exp = strings.TrimSpace(exp)
tpl = strings.Replace(tpl, "${"+exp+"}", toString(data[exp]), -1)
}
return tpl
}