FIX #16956 TIME 0:25 disable add date block button if external user

src/frontend/app/actions/send-external-signatory-book-action/maarch-paraph/signature-position/signature-position.component.html

@@ -85,7 +85,7 @@
                     <mat-icon class="fas fa-plus" style="height: auto"></mat-icon>
                 </button>
                 <mat-menu #actionPosMenu="matMenu">
-                    <button mat-menu-item [disabled]="!emptyDate()"
+                    <button mat-menu-item [disabled]="!emptyDate() || !checkExternalUser()"
                         (click)="initDateBlock()">{{'lang.addDateBlock' | translate}}</button>
                     <button mat-menu-item [disabled]="!emptySign()"
                         (click)="initSign()">{{'lang.addSignaturePosition' | translate}}</button>

src/frontend/app/actions/send-external-signatory-book-action/maarch-paraph/signature-position/signature-position.component.ts

@@ -262,4 +262,8 @@ export class SignaturePositionComponent implements OnInit {
             })
         ).subscribe();
     }
+
+    checkExternalUser() {
+        return this.data.workflow[this.currentUser].item_id !== null ? true : false;
+    }
 }