/
length.go
97 lines (75 loc) · 1.86 KB
/
length.go
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package validator
import (
"fmt"
"github.com/spf13/cobra"
)
type LengthRule struct {
Use Limit
Short Limit
Long Limit
Example Limit
}
type Limit struct {
Min, Max int
}
func (l *LengthRule) Validate(cmd *cobra.Command) []error {
var errors []error
err := validateCobraCommand(cmd, l)
errors = append(errors, err...)
for _, child := range cmd.Commands() {
err := validateCobraCommand(child, l)
errors = append(errors, err...)
}
return errors
}
func validateCobraCommand(cmd *cobra.Command, l *LengthRule) []error {
var errors []error
cmdPath := cmd.CommandPath()
use := cmd.Use
useErr := validateField(l.Use, use, cmdPath)
if useErr != nil {
errors = append(errors, useErr)
}
short := cmd.Short
shortErr := validateField(l.Short, short, cmdPath)
if shortErr != nil {
errors = append(errors, shortErr)
}
long := cmd.Long
longErr := validateField(l.Long, long, cmdPath)
if longErr != nil {
errors = append(errors, longErr)
}
example := cmd.Example
exampleErr := validateField(l.Example, example, cmdPath)
if exampleErr != nil {
errors = append(errors, exampleErr)
}
return errors
}
func validateField(limit Limit, value string, path string) error {
length := len(value)
_, err := isLimitSet(limit)
if err != nil {
return err
}
if length < limit.Min {
return fmt.Errorf("%s in %s: length should be atleast %d", value, path, limit.Min)
}
if length > limit.Max {
return fmt.Errorf("%s in %s: length should be less than %d", value, path, limit.Max)
}
return nil
}
func isLimitSet(limit Limit) (bool, error) {
if limit.Max < 0 || limit.Min < 0 {
return true, fmt.Errorf("max and min must be greater than 0")
}
if limit.Max == 0 && limit.Min == 0 {
return false, fmt.Errorf("limit not set")
}
if limit.Max < limit.Min {
return true, fmt.Errorf("max limit must be greater than min limit")
}
return true, nil
}