ForwardAttachments extracts the stored attachment parts of the message being forwarded and converts them to the outbound Attachment shape (base64-encoded data) so a forward carries the original files by default, the way mail clients do — the server already holds the bytes, so no client round-trip is
(rawMessage []byte)
| 162 | // needed. Order matches the source message's authoritative attachment index. |
| 163 | // Returns nil when the source has no attachments. |
| 164 | func ForwardAttachments(rawMessage []byte) []Attachment { |
| 165 | parts := mailparse.Attachments(rawMessage) |
| 166 | if len(parts) == 0 { |
| 167 | return nil |
| 168 | } |
| 169 | out := make([]Attachment, 0, len(parts)) |
| 170 | for _, p := range parts { |
| 171 | out = append(out, Attachment{ |
| 172 | Filename: p.Filename, |
| 173 | ContentType: p.ContentType, |
| 174 | Data: base64.StdEncoding.EncodeToString(p.Data), |
| 175 | }) |
| 176 | } |
| 177 | return out |
| 178 | } |
| 179 | |
| 180 | // BuildForwardSubject prefixes "Fwd: " unless the subject already starts |
| 181 | // with Fwd:, Fw:, or Re:. The dedup avoids stacking on chains. Empty |