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miniflux/validator/validator.go

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// Copyright 2021 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package validator // import "miniflux.app/validator"
import (
"errors"
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"fmt"
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"net/url"
"regexp"
"miniflux.app/locale"
)
// ValidationError represents a validation error.
type ValidationError struct {
TranslationKey string
}
// NewValidationError initializes a validation error.
func NewValidationError(translationKey string) *ValidationError {
return &ValidationError{TranslationKey: translationKey}
}
func (v *ValidationError) String() string {
return locale.NewPrinter("en_US").Printf(v.TranslationKey)
}
func (v *ValidationError) Error() error {
return errors.New(v.String())
}
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// ValidateRange makes sure the offset/limit values are valid.
func ValidateRange(offset, limit int) error {
if offset < 0 {
return fmt.Errorf(`Offset value should be >= 0`)
}
if limit < 0 {
return fmt.Errorf(`Limit value should be >= 0`)
}
return nil
}
// ValidateDirection makes sure the sorting direction is valid.
func ValidateDirection(direction string) error {
switch direction {
case "asc", "desc":
return nil
}
return fmt.Errorf(`Invalid direction, valid direction values are: "asc" or "desc"`)
}
// IsValidRegex verifies if the regex can be compiled.
func IsValidRegex(expr string) bool {
_, err := regexp.Compile(expr)
return err == nil
}
// IsValidURL verifies if the provided value is a valid absolute URL.
func IsValidURL(absoluteURL string) bool {
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_, err := url.ParseRequestURI(absoluteURL)
return err == nil
}