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/*
** Copyright (C) 2001-2025 Zabbix SIA
**
** Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
** documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
** rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
** permit persons to whom the Software is furnished to do so, subject to the following conditions:
**
** The above copyright notice and this permission notice shall be included in all copies or substantial portions
** of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
** WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
** COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
** SOFTWARE.
**/
// Package metric provides an interface for describing a schema of metric's parameters.
package metric
import (
"fmt"
"regexp"
"strconv"
"strings"
)
type Validator interface {
Validate(value *string) error
}
type SetValidator struct {
Set []string
CaseInsensitive bool
}
type PatternValidator struct {
Pattern string
}
type LenValidator struct {
Min *int
Max *int
}
type RangeValidator struct {
Min int
Max int
}
type NumberValidator struct{}
func (v SetValidator) Validate(value *string) error {
if v.Set != nil && len(v.Set) == 0 {
panic("set cannot be empty")
}
if value == nil {
return nil
}
for _, s := range v.Set {
if (v.CaseInsensitive && strings.ToLower(*value) == strings.ToLower(s)) || (!v.CaseInsensitive && *value == s) {
return nil
}
}
return fmt.Errorf("allowed values: %s", strings.Join(v.Set, ", "))
}
func (v PatternValidator) Validate(value *string) error {
if value == nil {
return nil
}
b, err := regexp.MatchString(v.Pattern, *value)
if err != nil {
return err
}
if !b {
return fmt.Errorf("value does not match pattern %q", v.Pattern)
}
return nil
}
func (v LenValidator) Validate(value *string) error {
if value == nil || (v.Min == nil && v.Max == nil) {
return nil
}
if v.Min != nil && len(*value) < *v.Min {
return fmt.Errorf("value cannot be shorter than %d characters", v.Min)
}
if v.Max != nil && len(*value) > *v.Max {
return fmt.Errorf("value cannot be longer than %d characters", v.Max)
}
return nil
}
func (v RangeValidator) Validate(value *string) error {
if value == nil {
return nil
}
intVal, err := strconv.Atoi(*value)
if err != nil {
return err
}
if intVal < v.Min || intVal > v.Max {
return fmt.Errorf("value is out of range [%d..%d]", v.Min, v.Max)
}
return nil
}
func (v NumberValidator) Validate(value *string) error {
if value == nil {
return nil
}
_, err := strconv.Atoi(*value)
return err
}
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