plakken/internal/utils/utils.go
2024-05-01 19:19:05 +02:00

117 lines
3 KiB
Go

package utils
import (
"errors"
"log"
mathrand "math/rand/v2"
"os"
"regexp"
"strconv"
"strings"
"git.gnous.eu/gnouseu/plakken/internal/constant"
)
// GenerateURL generate random string for plak url.
func GenerateURL(length uint8) string {
listChars := []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
b := make([]rune, length)
for i := range b {
b[i] = listChars[mathrand.IntN(len(listChars))]
}
return string(b)
}
// CheckCharRedundant verify is a character is redundant in a string.
func CheckCharRedundant(source string, char string) bool { // Verify if a char is redundant
return strings.Count(source, char) > 1
}
func parseIntBeforeSeparator(source *string, sep string) (int, error) { // return 0 & error if error, only accept positive number
if CheckCharRedundant(*source, sep) {
return 0, &parseIntBeforeSeparatorError{message: *source + ": cannot parse value as int"}
}
var value int
var err error
if strings.Contains(*source, sep) {
value, err = strconv.Atoi(strings.Split(*source, sep)[0])
if err != nil {
log.Println(err)
return 0, &parseIntBeforeSeparatorError{message: *source + ": cannot parse value as int"}
}
if value < 0 { // Only positive value is correct
return 0, &parseIntBeforeSeparatorError{message: *source + ": format only take positive value"}
}
if value > 99 { //nolint:gomnd
return 0, &parseIntBeforeSeparatorError{message: *source + ": Format only take two number"}
}
*source = strings.Join(strings.Split(*source, sep)[1:], "")
}
return value, nil
}
// ParseExpiration Parse "1d1h1m1s" duration format. Return 0 & error if error.
func ParseExpiration(source string) (int, error) {
var expiration int
var tempOutput int
var err error
if source == "0" {
return 0, nil
}
source = strings.ToLower(source)
tempOutput, err = parseIntBeforeSeparator(&source, "d")
expiration = tempOutput * constant.SecondsInDay
if err != nil {
log.Println(err)
return 0, &ParseExpirationError{message: "Invalid syntax"}
}
tempOutput, err = parseIntBeforeSeparator(&source, "h")
expiration += tempOutput * constant.SecondsInHour
if err != nil {
log.Println(err)
return 0, &ParseExpirationError{message: "Invalid syntax"}
}
tempOutput, err = parseIntBeforeSeparator(&source, "m")
expiration += tempOutput * constant.SecondsInMinute
if err != nil {
log.Println(err)
return 0, &ParseExpirationError{message: "Invalid syntax"}
}
tempOutput, err = parseIntBeforeSeparator(&source, "s")
expiration += tempOutput * 1
if err != nil {
log.Println(err)
return 0, &ParseExpirationError{message: "Invalid syntax"}
}
return expiration, nil
}
// ValidKey Verify if a key is valid (only letter, number, - and _).
func ValidKey(key string) bool {
result, err := regexp.MatchString("^[a-zA-Z0-9_.-]*$", key)
if err != nil {
return false
}
log.Println(key, result)
return result
}
// FileExist verify if a file exist.
func FileExist(path string) bool {
_, err := os.Stat(path)
return !errors.Is(err, os.ErrNotExist)
}