Merge remote-tracking branch 'origin/master'

svc/internal/mailer/graph_mailer.go

@@ -3,6 +3,7 @@ package mailer
 import (
 	"bytes"
 	"context"
+	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -145,6 +146,36 @@ func (g *GraphMailer) Send(ctx context.Context, msg Message) error {
 		message["replyTo"] = replyToRecipients
 	}
 
+	if len(msg.Attachments) > 0 {
+		atts := make([]map[string]any, 0, len(msg.Attachments))
+		for _, a := range msg.Attachments {
+			if len(a.Data) == 0 {
+				continue
+			}
+
+			name := strings.TrimSpace(a.FileName)
+			if name == "" {
+				name = "attachment.bin"
+			}
+
+			contentType := strings.TrimSpace(a.ContentType)
+			if contentType == "" {
+				contentType = "application/octet-stream"
+			}
+
+			atts = append(atts, map[string]any{
+				"@odata.type":  "#microsoft.graph.fileAttachment",
+				"name":         name,
+				"contentType":  contentType,
+				"contentBytes": base64.StdEncoding.EncodeToString(a.Data),
+			})
+		}
+
+		if len(atts) > 0 {
+			message["attachments"] = atts
+		}
+	}
+
 	payload := map[string]any{
 		"message":         message,
 		"saveToSentItems": true,