86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
package domain
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import (
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"fmt"
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"strconv"
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"strings"
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)
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// GrantType represent fixed grant_type parameter.
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//
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// NOTE(toby3d): Encapsulate enums in structs for extra compile-time safety:
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// https://threedots.tech/post/safer-enums-in-go/#struct-based-enums
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type GrantType struct {
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uid string
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}
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//nolint: gochecknoglobals // structs cannot be constants
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var (
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GrantTypeUndefined = GrantType{uid: ""}
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GrantTypeAuthorizationCode = GrantType{uid: "authorization_code"}
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GrantTypeRefreshToken = GrantType{uid: "refresh_token"}
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// TicketAuth extension.
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GrantTypeTicket = GrantType{uid: "ticket"}
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)
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var ErrGrantTypeUnknown error = NewError(
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ErrorCodeInvalidGrant,
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"unknown grant type",
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"",
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)
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//nolint: gochecknoglobals // maps cannot be constants
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var uidsGrantTypes = map[string]GrantType{
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GrantTypeAuthorizationCode.uid: GrantTypeAuthorizationCode,
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GrantTypeRefreshToken.uid: GrantTypeRefreshToken,
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GrantTypeTicket.uid: GrantTypeTicket,
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}
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// ParseGrantType parse grant_type value as GrantType struct enum.
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func ParseGrantType(uid string) (GrantType, error) {
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if grantType, ok := uidsGrantTypes[strings.ToLower(uid)]; ok {
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return grantType, nil
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}
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return GrantTypeUndefined, fmt.Errorf("%w: %s", ErrGrantTypeUnknown, uid)
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}
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// UnmarshalForm implements custom unmarshler for form values.
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func (gt *GrantType) UnmarshalForm(src []byte) error {
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responseType, err := ParseGrantType(string(src))
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if err != nil {
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return fmt.Errorf("GrantType: UnmarshalForm: %w", err)
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}
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*gt = responseType
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return nil
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}
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// UnmarshalJSON implements custom unmarshler for JSON.
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func (gt *GrantType) UnmarshalJSON(v []byte) error {
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src, err := strconv.Unquote(string(v))
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if err != nil {
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return fmt.Errorf("GrantType: UnmarshalJSON: %w", err)
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}
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responseType, err := ParseGrantType(src)
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if err != nil {
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return fmt.Errorf("GrantType: UnmarshalJSON: %w", err)
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}
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*gt = responseType
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return nil
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}
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func (gt GrantType) MarshalJSON() ([]byte, error) {
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return []byte(strconv.Quote(gt.uid)), nil
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}
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// String returns string representation of grant type.
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func (gt GrantType) String() string {
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return gt.uid
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}
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