The backend for the AiteStory website
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64 lines
1.4 KiB

package formparser
import (
"errors"
"fmt"
"log"
"time"
)
// String parses a string, returning an error if it's outside the range of min,max. It still
// sets the value so that it can be used for the view model. It would be bad if the user lost
// a really long page because of the length limit
func String(value string, target *string, min, max int) error {
*target = value
if len(value) < min || len(value) > max {
return fmt.Errorf("not between %d and %d", min, max)
}
return nil
}
// Select sets the targer if the given form value is inside the list. It will skip if optional
// is set and the value is empty
func Select(value string, target *string, allowedValues []string, optional bool) error {
if value == "" {
if !optional {
return errors.New("no option selected")
}
return nil
}
log.Println(value, allowedValues)
for _, allowedValue := range allowedValues {
if value == allowedValue {
*target = value
return nil
}
}
return errors.New("not a valid option")
}
// Date parses a date, returning an error if it's missing (and not optional) and if it
// cannot be parsed according to RFC3339
func Date(value string, target *time.Time, optional bool) error {
if value == "" {
if optional {
return nil
}
return errors.New("missing")
}
date, err := time.Parse(time.RFC3339, value)
if err != nil {
return errors.New("an invalid date")
}
*target = date
return nil
}