/
validation.go
97 lines (74 loc) · 1.7 KB
/
validation.go
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package app
import (
"errors"
"net/url"
)
type Validator struct {
KeyMaxLength int
allowedLetters string
}
func NewValidator(allowedLetters string) *Validator {
return &Validator{
allowedLetters: allowedLetters,
}
}
func (v *Validator) validateKey(key string) error {
if key == "" {
return errors.New("key must be at least 1 letter long")
}
if len(key) > 10 {
return errors.New("key is invalid")
}
for _, keyLetter := range key {
found := false
for _, generatorLetter := range v.allowedLetters {
if keyLetter == generatorLetter {
found = true
break
}
}
if !found {
return errors.New("invalid letter")
}
}
return nil
}
func (v *Validator) validateKeys(keys []string) error {
for _, key := range keys {
if err := v.validateKey(key); err != nil {
return err
}
}
return nil
}
func (v *Validator) validateURL(URL string) error {
if len(URL) > 2000 {
return errors.New("URL must be maximum 2000 letters long")
}
if URL == "" {
return errors.New("URL must be a valid URL string")
}
parsedURL, err := url.Parse(URL)
if err != nil {
return errors.New("URL must be a valid URL string")
} else if parsedURL.Scheme == "" || parsedURL.Host == "" {
return errors.New("URL must be an absolute URL")
} else if parsedURL.Scheme != "http" && parsedURL.Scheme != "https" {
return errors.New("URL must begin with http or https")
}
return nil
}
func (v *Validator) validateURLs(URLs []string) error {
uniqueURLs := make(map[string]bool, len(URLs))
for _, URL := range URLs {
err := v.validateURL(URL)
if err != nil {
return err
}
if uniqueURLs[URL] {
return errors.New("URLs must be non-repeated")
}
uniqueURLs[URL] = true
}
return nil
}