Add methods for getting SVG and JSON metadata in NAD viewer (#152)

Signed-off-by: massimo.ferraro <[email protected]>

src/components/network-area-diagram-viewer/network-area-diagram-viewer.ts

@@ -389,6 +389,14 @@ export class NetworkAreaDiagramViewer {
         }
     }
 
+    public getSvg(): string | null {
+        return this.svgDraw !== undefined ? this.svgDraw.svg() : null;
+    }
+
+    public getJsonMetadata(): string | null {
+        return JSON.stringify(this.diagramMetadata);
+    }
+
     public getDimensionsFromSvg(): DIMENSIONS | null {
         // Dimensions are set in the main svg tag attributes. We want to parse those data without loading the whole svg in the DOM.
         const result = this.svgContent.match('<svg[^>]*>');