Function ProcessAttachmentWithMetadata

pkg/chat/attach.go:62–73

ProcessAttachmentWithMetadata is like [ProcessAttachment] but also returns the [ImageResizeResult] when the attachment was an image that went through [ResizeImage]. The metadata is nil for non-image attachments. Callers that need to emit a dimension note (for model coordinate-mapping) should use th

(part MessagePart)

// should use this variant and call [FormatDimensionNote] on the returned
// metadata.
func ProcessAttachmentWithMetadata(part MessagePart) (Document, *ImageResizeResult, error) {
	switch part.Type {
	case MessagePartTypeFile:
		return processFilePart(part)
	case MessagePartTypeImageURL:
		return processImageURLPart(part)
	case MessagePartTypeDocument:
		return processDocumentPart(part)
	default:
		return Document{}, nil, fmt.Errorf("ProcessAttachment: unsupported part type %q", part.Type)
	}
}

// processFilePart handles MessagePartTypeFile: reads from disk, detects MIME,
// routes to text-inline or binary-inline as appropriate.