my-log/tools/parse.go

package tools

import (
	"encoding/json"
	"regexp"
	"strconv"
	"strings"
)

func ParseBytes(in []byte) any {
	return ParseString(string(in))
}

func ParseString(in string) any {
	s := strings.TrimSpace(in)
	if s == "" {
		return s
	}

	if strings.HasPrefix(s, "!") {
		return s
	}

	yesno := regexp.MustCompile("^(y|Y|yes|Yes|YES|n|N|no|No|NO|true|True|TRUE|false|False|FALSE|on|On|ON|off|Off|OFF)$")
	yes := regexp.MustCompile("^(y|Y|yes|Yes|YES|true|True|TRUE|on|On|ON)$")
	null := regexp.MustCompile("^(~|null|Null|NULL|none|None|NONE|nil|Nil|NIL)$")
	var j json.RawMessage
	if null.MatchString(s) {
		return nil
	} else if yesno.MatchString(s) {
		return yes.MatchString(s)
	} else if i, err := strconv.Atoi(s); err == nil {
		return i
	} else if f, err := strconv.ParseFloat(s, 64); err == nil {
		return f
	} else if t, err := ParseDate(s); err == nil {
		return t
	} else if err := json.Unmarshal([]byte(s), &j); err == nil {
		return j
	}

	return s
}