34 lines
644 B
Go
34 lines
644 B
Go
package validate
|
|
|
|
import (
|
|
"errors"
|
|
"strings"
|
|
)
|
|
|
|
// Friendly user-facing errors
|
|
var (
|
|
errBadEmail = errors.New("User doesn't exist.")
|
|
)
|
|
|
|
// Email does basic validation on the intended receiving address. It returns a
|
|
// friendly error message that can be served directly to connecting clients if
|
|
// validation fails.
|
|
func Email(to string) error {
|
|
host := to[strings.IndexRune(to, '@')+1:]
|
|
// TODO: use given configurable host (don't hardcode)
|
|
if host != "writ.es" {
|
|
return errBadEmail
|
|
}
|
|
|
|
toName := to[:strings.IndexRune(to, '@')]
|
|
if toName == "anyone" {
|
|
return nil
|
|
}
|
|
|
|
if len(toName) != 32 {
|
|
return errBadEmail
|
|
}
|
|
|
|
return nil
|
|
}
|