kern/v4/d0/tuf/tuf.go

// package tuf -- Text Universal Format
package tuf

import (
	"fmt"
	"strings"

	"gitp78su.ipnodns.ru/svi/kern/v4/d0/defs/def_err"
	"gitp78su.ipnodns.ru/svi/kern/v4/d0/defs/def_spec_base"
	"gitp78su.ipnodns.ru/svi/kern/v4/d0/defs/table/owner"
	"gitp78su.ipnodns.ru/svi/kern/v4/d0/helpers"
	"gitp78su.ipnodns.ru/svi/kern/v4/d0/result"
)

// StrToTuf -- конвертация строки в ITuf.
func StrToTuf(key, val def_spec_base.Txt) def_spec_base.Txt {
	keyCheck(key)

	txtRes := "ATxt;" + string(key) + ";" + replace(val) + "\n"
	return def_spec_base.Txt(txtRes)
}

// BoolToTuf -- конвертация bool в ITuf.
func BoolToTuf(key def_spec_base.Txt, val def_spec_base.Bool) def_spec_base.Txt {
	keyCheck(key)
	txtRes := "Bool;" + string(key) + ";" + fmt.Sprint(val) + "\n"
	return def_spec_base.Txt(txtRes)
}

// RecToTuf -- конвертация записи в TUF.
func RecToTuf(type_, val def_spec_base.Txt) def_spec_base.Txt {
	keyCheck(type_)
	strRes := "Rec;" + string(type_) + ";" + replace(val) + "\n"
	return def_spec_base.Txt(strRes)
}

// RecFromTuf -- конвертация записи из TUF.
func RecFromTuf(owner *owner.LOwner,  type_, val def_spec_base.Txt) *result.Result[def_spec_base.Txt] {
	keyCheck(type_)
	lstField := strings.Split(string(val), ";")
	if len(lstField) != 3 {
		return result.ResErr[def_spec_base.Txt](
			def_err.LetErr(owner, "tuf.RecFromTuf(): valTuf len(%v)!=3", len(lstField)))
	}
	if lstField[0] != "Rec" {
		return result.ResErr[def_spec_base.Txt](
			def_err.LetErr(owner, "tuf.RecFromTuf(): valTuf(%v) not record", lstField[0]))
	}
	if lstField[1] != string(type_) {
		return result.ResErr[def_spec_base.Txt](
			def_err.LetErr(owner, "tuf.RecFromTuf(): valTuf(%v) not valid type(%v)", lstField[1], type_))
	}
	txtRes := restore(lstField[2])
	return result.ResOk(txtRes)
}

// Проверяет ключ на допустимое значение.
func keyCheck(key def_spec_base.Txt) {
	helpers.If(def_spec_base.Bool(strings.Contains(string(key), ";"))).Hassert("tuf.keyCheck(): key contains ';'")
	helpers.If(def_spec_base.Bool(strings.Contains(string(key), "\n"))).Hassert("tuf.keyCheck(): key contains '\\n'")
	helpers.If(def_spec_base.Bool(strings.Contains(string(key), "="))).Hassert("tuf.keyCheck(): key contains '='")
}

// Заменяет все запрещённые комбинации.
func replace(val def_spec_base.Txt) string {
	strVal := strings.ReplaceAll(string(val), "\r", "")
	strVal = strings.ReplaceAll(strVal, "\n", "`NL")
	strVal = strings.ReplaceAll(strVal, "`", "`TL")
	strVal = strings.ReplaceAll(strVal, "=", "`EQ")
	strVal = strings.ReplaceAll(strVal, ";", "`CS")
	return strVal
}

// Восстанавливает строку.
func restore(val string) def_spec_base.Txt {
	strVal := strings.ReplaceAll(val, "`TL", "`")
	strVal = strings.ReplaceAll(strVal, "`CS", ";")
	strVal = strings.ReplaceAll(strVal, "`EQ", "=")
	strVal = strings.ReplaceAll(strVal, "`NL", "\n")
	return def_spec_base.Txt(strVal)
}