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