Add an export feature along with the mermaid diagram. Add sidebar to loading page.

Author: sabaimran

src/interface/web/app/components/loading/loading.tsx

@@ -1,4 +1,9 @@
+import { SidebarInset, SidebarProvider, SidebarTrigger } from "@/components/ui/sidebar";
 import { CircleNotch } from "@phosphor-icons/react";
+import { AppSidebar } from "../appSidebar/appSidebar";
+import { Separator } from "@/components/ui/separator";
+import { useIsMobileWidth } from "@/app/common/utils";
+import { KhojLogoType } from "../logo/khojLogo";
 
 interface LoadingProps {
     className?: string;
@@ -7,21 +12,39 @@ interface LoadingProps {
 }
 
 export default function Loading(props: LoadingProps) {
+    const isMobileWidth = useIsMobileWidth();
+
     return (
         // NOTE: We can display usage tips here for casual learning moments.
-        <div
-            className={
-                props.className ||
-                "bg-background opacity-50 flex items-center justify-center h-screen"
-            }
-        >
-            <div>
-                {props.message || "Loading"}{" "}
-                <span>
-                    <CircleNotch className="inline animate-spin h-5 w-5" />
-                </span>
+        <SidebarProvider>
+            <AppSidebar conversationId={""} />
+            <SidebarInset>
+                <header className="flex h-16 shrink-0 items-center gap-2 border-b px-4">
+                    <SidebarTrigger className="-ml-1" />
+                    <Separator orientation="vertical" className="mr-2 h-4" />
+                    {isMobileWidth ? (
+                        <a className="p-0 no-underline" href="/">
+                            <KhojLogoType className="h-auto w-16" />
+                        </a>
+                    ) : (
+                        <h2 className="text-lg">Ask Anything</h2>
+                    )}
+                </header>
+            </SidebarInset>
+            <div
+                className={
+                    props.className ||
+                    "bg-background opacity-50 flex items-center justify-center h-full w-full fixed top-0 left-0 z-50"
+                }
+            >
+                <div>
+                    {props.message || "Loading"}{" "}
+                    <span>
+                        <CircleNotch className="inline animate-spin h-5 w-5" />
+                    </span>
+                </div>
             </div>
-        </div>
+        </SidebarProvider>
     );
 }
 

src/interface/web/app/components/mermaid/mermaid.tsx

@@ -1,6 +1,7 @@
 import React, { useEffect, useState, useRef } from "react";
 import mermaid from "mermaid";
-import { Info } from "@phosphor-icons/react";
+import { Download, Info } from "@phosphor-icons/react";
+import { Button } from "@/components/ui/button";
 
 interface MermaidProps {
     chart: string;
@@ -41,8 +42,71 @@ const Mermaid: React.FC<MermaidProps> = ({ chart }) => {
         mermaid.contentLoaded();
     }, []);
 
+    const handleExport = async () => {
+        if (!elementRef.current) return;
+
+        try {
+            // Get SVG element
+            const svgElement = elementRef.current.querySelector("svg");
+            if (!svgElement) throw new Error("No SVG found");
+
+            // Get SVG viewBox dimensions
+            const viewBox = svgElement.getAttribute("viewBox")?.split(" ").map(Number) || [
+                0, 0, 0, 0,
+            ];
+            const [, , viewBoxWidth, viewBoxHeight] = viewBox;
+
+            // Create canvas with viewBox dimensions
+            const canvas = document.createElement("canvas");
+            const scale = 2; // For better resolution
+            canvas.width = viewBoxWidth * scale;
+            canvas.height = viewBoxHeight * scale;
+            const ctx = canvas.getContext("2d");
+            if (!ctx) throw new Error("Failed to get canvas context");
+
+            // Convert SVG to data URL
+            const svgData = new XMLSerializer().serializeToString(svgElement);
+            const svgBlob = new Blob([svgData], { type: "image/svg+xml;charset=utf-8" });
+            const svgUrl = URL.createObjectURL(svgBlob);
+
+            // Create and load image
+            const img = new Image();
+            img.src = svgUrl;
+
+            await new Promise((resolve, reject) => {
+                img.onload = () => {
+                    // Scale context for better resolution
+                    ctx.scale(scale, scale);
+                    ctx.drawImage(img, 0, 0, viewBoxWidth, viewBoxHeight);
+
+                    canvas.toBlob((blob) => {
+                        if (!blob) {
+                            reject(new Error("Failed to create blob"));
+                            return;
+                        }
+
+                        const url = URL.createObjectURL(blob);
+                        const a = document.createElement("a");
+                        a.href = url;
+                        a.download = `mermaid-diagram-${Date.now()}.png`;
+                        a.click();
+
+                        // Cleanup
+                        URL.revokeObjectURL(url);
+                        URL.revokeObjectURL(svgUrl);
+                        resolve(true);
+                    }, "image/png");
+                };
+
+                img.onerror = () => reject(new Error("Failed to load SVG"));
+            });
+        } catch (error) {
+            console.error("Error exporting diagram:", error);
+            setMermaidError("Failed to export diagram");
+        }
+    };
+
     useEffect(() => {
-        console.log("Rendering mermaid chart:", chart);
         if (elementRef.current) {
             elementRef.current.removeAttribute("data-processed");
 
@@ -79,6 +143,12 @@ const Mermaid: React.FC<MermaidProps> = ({ chart }) => {
                     {chart}
                 </div>
             )}
+            {!mermaidError && (
+                <Button onClick={handleExport} variant={"secondary"} className="mt-3">
+                    <Download className="w-5 h-5" />
+                    Export as PNG
+                </Button>
+            )}
         </div>
     );
 };