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Enhance documentation for SendError methods and fields

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Improved comments for better clarity and detail in SendError-related methods and fields. Updated comments provide more in-depth explanations of functionality, parameters, return values, and usage.
This commit is contained in:
Winni Neessen 2024-10-06 17:12:52 +02:00
parent 5d79ff69c3
commit 6ce5c2a860
Signed by: wneessen
GPG key ID: 385AC9889632126E
1 changed files with 65 additions and 10 deletions
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75
senderror.go
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@ -54,7 +54,11 @@ const (
ErrAmbiguous
)
// SendError is an error wrapper for delivery errors of the Msg
// SendError is an error wrapper for delivery errors of the Msg.
//
// This struct represents an error that occurs during the delivery of a message. It holds
// details about the affected message, a list of errors, the recipient list, and whether
// the error is temporary or permanent. It also includes a reason code for the error.
type SendError struct {
affectedMsg *Msg
errlist []error
@ -66,7 +70,16 @@ type SendError struct {
// SendErrReason represents a comparable reason on why the delivery failed
type SendErrReason int
// Error implements the error interface for the SendError type
// Error implements the error interface for the SendError type.
//
// This function returns a detailed error message string for the SendError, including the
// reason for failure, list of errors, affected recipients, and the message ID of the
// affected message (if available). If the reason is unknown (greater than 10), it returns
// "unknown reason". The error message is built dynamically based on the content of the
// error list, recipient list, and message ID.
//
// Returns:
// - A string representing the error message.
func (e *SendError) Error() string {
if e.Reason > 10 {
return "unknown reason"
@ -101,7 +114,17 @@ func (e *SendError) Error() string {
return errMessage.String()
}
// Is implements the errors.Is functionality and compares the SendErrReason
// Is implements the errors.Is functionality and compares the SendErrReason.
//
// This function allows for comparison between two errors by checking if the provided
// error matches the SendError type and, if so, compares the SendErrReason and the
// temporary status (isTemp) of both errors.
//
// Parameters:
// - errType: The error to compare against the current SendError.
//
// Returns:
// - true if the errors have the same reason and temporary status, false otherwise.
func (e *SendError) Is(errType error) bool {
var t *SendError
if errors.As(errType, &t) && t != nil {
@ -110,7 +133,13 @@ func (e *SendError) Is(errType error) bool {
return false
}
// IsTemp returns true if the delivery error is of temporary nature and can be retried
// IsTemp returns true if the delivery error is of a temporary nature and can be retried.
//
// This function checks whether the SendError indicates a temporary error, which suggests
// that the delivery can be retried. If the SendError is nil, it returns false.
//
// Returns:
// - true if the error is temporary, false otherwise.
func (e *SendError) IsTemp() bool {
if e == nil {
return false
@ -118,8 +147,13 @@ func (e *SendError) IsTemp() bool {
return e.isTemp
}
// MessageID returns the message ID of the affected Msg that caused the error
// If no message ID was set for the Msg, an empty string will be returned
// MessageID returns the message ID of the affected Msg that caused the error.
//
// This function retrieves the message ID of the Msg associated with the SendError.
// If no message ID was set or if the SendError or Msg is nil, it returns an empty string.
//
// Returns:
// - The message ID as a string, or an empty string if no ID is available.
func (e *SendError) MessageID() string {
if e == nil || e.affectedMsg == nil {
return ""
@ -127,7 +161,13 @@ func (e *SendError) MessageID() string {
return e.affectedMsg.GetMessageID()
}
// Msg returns the pointer to the affected message that caused the error
// Msg returns the pointer to the affected message that caused the error.
//
// This function retrieves the Msg associated with the SendError. If the SendError or
// the affectedMsg is nil, it returns nil.
//
// Returns:
// - A pointer to the Msg that caused the error, or nil if not available.
func (e *SendError) Msg() *Msg {
if e == nil || e.affectedMsg == nil {
return nil
@ -135,7 +175,14 @@ func (e *SendError) Msg() *Msg {
return e.affectedMsg
}
// String implements the Stringer interface for the SendErrReason
// String satisfies the fmt.Stringer interface for the SendErrReason type.
//
// This function converts the SendErrReason into a human-readable string representation based
// on the error type. If the error reason does not match any predefined case, it returns
// "unknown reason".
//
// Returns:
// - A string representation of the SendErrReason.
func (r SendErrReason) String() string {
switch r {
case ErrGetSender:
@ -164,8 +211,16 @@ func (r SendErrReason) String() string {
return "unknown reason"
}
// isTempError checks the given SMTP error and returns true if the given error is of temporary nature
// and should be retried
// isTempError checks if the given SMTP error is of a temporary nature and should be retried.
//
// This function inspects the error message and returns true if the first character of the
// error message is '4', indicating a temporary SMTP error that can be retried.
//
// Parameters:
// - err: The error to check.
//
// Returns:
// - true if the error is temporary, false otherwise.
func isTempError(err error) bool {
return err.Error()[0] == '4'
}