mirror of
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73 lines
1.6 KiB
Go
73 lines
1.6 KiB
Go
package util
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import (
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"crypto/rand"
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"math/big"
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"net/mail"
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"strconv"
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"strings"
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"github.com/google/uuid"
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)
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// ConvertStringToInt32 converts a string to int32.
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func ConvertStringToInt32(src string) (int32, error) {
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parsed, err := strconv.ParseInt(src, 10, 32)
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if err != nil {
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return 0, err
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}
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return int32(parsed), nil
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}
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// HasPrefixes returns true if the string s has any of the given prefixes.
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func HasPrefixes(src string, prefixes ...string) bool {
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for _, prefix := range prefixes {
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if strings.HasPrefix(src, prefix) {
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return true
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}
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}
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return false
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}
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// ValidateEmail validates the email.
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func ValidateEmail(email string) bool {
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if _, err := mail.ParseAddress(email); err != nil {
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return false
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}
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return true
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}
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func GenUUID() string {
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return uuid.New().String()
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}
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var letters = []rune("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
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// RandomString returns a random string with length n.
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func RandomString(n int) (string, error) {
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var sb strings.Builder
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sb.Grow(n)
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for i := 0; i < n; i++ {
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// The reason for using crypto/rand instead of math/rand is that
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// the former relies on hardware to generate random numbers and
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// thus has a stronger source of random numbers.
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randNum, err := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))
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if err != nil {
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return "", err
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}
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if _, err := sb.WriteRune(letters[randNum.Uint64()]); err != nil {
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return "", err
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}
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}
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return sb.String(), nil
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}
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// ReplaceString replaces all occurrences of old in slice with new.
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func ReplaceString(slice []string, old, new string) []string {
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for i, s := range slice {
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if s == old {
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slice[i] = new
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}
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}
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return slice
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}
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