108 lines
2.9 KiB
Go
108 lines
2.9 KiB
Go
package models
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import "fmt"
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// =====================
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// User Operation Errors
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// =====================
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// ErrUsernameExists represents a "UsernameAlreadyExists" kind of error.
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type ErrUsernameExists struct {
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UserID int64
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Username string
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}
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// IsErrUsernameExists checks if an error is a ErrUsernameExists.
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func IsErrUsernameExists(err error) bool {
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_, ok := err.(ErrUsernameExists)
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return ok
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}
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func (err ErrUsernameExists) Error() string {
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return fmt.Sprintf("a user with this username does already exist [user id: %d, username: %s]", err.UserID, err.Username)
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}
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// ErrNoUsername represents a "UsernameAlreadyExists" kind of error.
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type ErrNoUsername struct {
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UserID int64
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}
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// IsErrNoUsername checks if an error is a ErrUsernameExists.
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func IsErrNoUsername(err error) bool {
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_, ok := err.(ErrNoUsername)
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return ok
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}
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func (err ErrNoUsername) Error() string {
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return fmt.Sprintf("you need to specify a username [user id: %d]", err.UserID)
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}
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// ErrUserDoesNotExist represents a "UsernameAlreadyExists" kind of error.
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type ErrUserDoesNotExist struct {
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UserID int64
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}
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// IsErrUserDoesNotExist checks if an error is a ErrUsernameExists.
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func IsErrUserDoesNotExist(err error) bool {
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_, ok := err.(ErrUserDoesNotExist)
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return ok
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}
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func (err ErrUserDoesNotExist) Error() string {
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return fmt.Sprintf("this user does not exist [user id: %d]", err.UserID)
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}
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// ErrIDCannotBeZero represents a "UsernameAlreadyExists" kind of error.
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type ErrIDCannotBeZero struct {}
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// IsErrIDCannotBeZero checks if an error is a ErrUsernameExists.
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func IsErrIDCannotBeZero(err error) bool {
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_, ok := err.(ErrIDCannotBeZero)
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return ok
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}
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func (err ErrIDCannotBeZero) Error() string {
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return fmt.Sprintf("ID cannot be 0")
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}
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// ErrAuthorCannotBeEmpty represents a "AuthorCannotBeEmpty" kind of error.
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type ErrAuthorCannotBeEmpty struct {}
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// IsErrIDCannotBeZero checks if an error is a ErrUsernameExists.
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func IsErrAuthorCannotBeEmpty(err error) bool {
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_, ok := err.(ErrAuthorCannotBeEmpty)
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return ok
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}
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func (err ErrAuthorCannotBeEmpty) Error() string {
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return fmt.Sprintf("author cannot be empty")
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}
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// ErrItemTitleCannotBeEmpty represents a "ErrItemTitleCannotBeEmpty" kind of error.
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type ErrItemTitleCannotBeEmpty struct {}
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// IsErrItemTitleCannotBeEmpty checks if an error is a ErrItemTitleCannotBeEmpty.
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func IsErrItemTitleCannotBeEmpty(err error) bool {
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_, ok := err.(ErrItemTitleCannotBeEmpty)
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return ok
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}
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func (err ErrItemTitleCannotBeEmpty) Error() string {
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return fmt.Sprintf("title cannot be empty")
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}
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// ErrBookTitleCannotBeEmpty represents a "ErrBookTitleCannotBeEmpty" kind of error.
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type ErrBookTitleCannotBeEmpty struct {}
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// ErrBookTitleCannotBeEmpty checks if an error is a ErrBookTitleCannotBeEmpty.
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func IsErrBookTitleCannotBeEmpty(err error) bool {
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_, ok := err.(ErrBookTitleCannotBeEmpty)
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return ok
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}
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func (err ErrBookTitleCannotBeEmpty) Error() string {
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return fmt.Sprintf("the book should at least have a title")
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}
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