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Refactor error comments for clarity

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Updated error comments to provide clearer and more descriptive explanations. Enhanced readability by elaborating on the conditions that result in each error, giving developers better context. No functional changes to the code were made.
This commit is contained in:
Winni Neessen 2024-10-04 21:12:05 +02:00
parent 6cd3cfd2f7
commit 779a3f3942
Signed by: wneessen
GPG key ID: 385AC9889632126E
1 changed files with 14 additions and 16 deletions
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30
client.go
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@ -186,43 +186,41 @@ type (
)
var (
// ErrInvalidPort should be used if a port is specified that is not valid
// ErrInvalidPort is returned when the specified port for the SMTP connection is not valid
ErrInvalidPort = errors.New("invalid port number")
// ErrInvalidTimeout should be used if a timeout is set that is zero or negative
// ErrInvalidTimeout is returned when the specified timeout is zero or negative.
ErrInvalidTimeout = errors.New("timeout cannot be zero or negative")
// ErrInvalidHELO should be used if an empty HELO sting is provided
// ErrInvalidHELO is returned when the HELO/EHLO value is invalid due to being empty.
ErrInvalidHELO = errors.New("invalid HELO/EHLO value - must not be empty")
// ErrInvalidTLSConfig should be used if an empty tls.Config is provided
// ErrInvalidTLSConfig is returned when the provided TLS configuration is invalid or nil.
ErrInvalidTLSConfig = errors.New("invalid TLS config")
// ErrNoHostname should be used if a Client has no hostname set
// ErrNoHostname is returned when the hostname for the client is not provided or empty.
ErrNoHostname = errors.New("hostname for client cannot be empty")
// ErrDeadlineExtendFailed should be used if the extension of the connection deadline fails
// ErrDeadlineExtendFailed is returned when an attempt to extend the connection deadline fails.
ErrDeadlineExtendFailed = errors.New("connection deadline extension failed")
// ErrNoActiveConnection should be used when a method is used that requies a server connection
// but is not yet connected
// ErrNoActiveConnection indicates that there is no active connection to the SMTP server.
ErrNoActiveConnection = errors.New("not connected to SMTP server")
// ErrServerNoUnencoded should be used when 8BIT encoding is selected for a message, but
// the server does not offer 8BITMIME mode
// ErrServerNoUnencoded indicates that the server does not support 8BITMIME for unencoded 8-bit messages.
ErrServerNoUnencoded = errors.New("message is 8bit unencoded, but server does not support 8BITMIME")
// ErrInvalidDSNMailReturnOption should be used when an invalid option is provided for the
// DSNMailReturnOption in WithDSN
// ErrInvalidDSNMailReturnOption is returned when an invalid DSNMailReturnOption is provided as argument
// to the WithDSN Option.
ErrInvalidDSNMailReturnOption = errors.New("DSN mail return option can only be HDRS or FULL")
// ErrInvalidDSNRcptNotifyOption should be used when an invalid option is provided for the
// DSNRcptNotifyOption in WithDSN
// ErrInvalidDSNRcptNotifyOption is returned when an invalid DSNRcptNotifyOption is provided as argument
// to the WithDSN Option.
ErrInvalidDSNRcptNotifyOption = errors.New("DSN rcpt notify option can only be: NEVER, " +
"SUCCESS, FAILURE or DELAY")
// ErrInvalidDSNRcptNotifyCombination should be used when an invalid option is provided for the
// DSNRcptNotifyOption in WithDSN
// ErrInvalidDSNRcptNotifyCombination is returned when an invalid combination of DSNRcptNotifyOption is
// provided as argument to the WithDSN Option.
ErrInvalidDSNRcptNotifyCombination = errors.New("DSN rcpt notify option NEVER cannot be " +
"combined with any of SUCCESS, FAILURE or DELAY")
)