save as pdf option added

next.config.mjs

@@ -17,5 +17,22 @@ export default withPWAConfig({
         hostname: '*',
       }
     ]
-  }
-});
+  },
+  webpack: (config, { isServer }) => {
+    // If it's a server build, exclude the `.node` file from bundling
+    if (isServer) {
+      config.externals = config.externals || [];
+      config.externals.push({
+        '@resvg/resvg-js-darwin-arm64/resvgjs.darwin-arm64.node': 'commonjs2 @resvg/resvg-js-darwin-arm64/resvgjs.darwin-arm64.node',
+      });
+    }
+
+    // Use node-loader for .node files
+    config.module.rules.push({
+      test: /\.node$/,
+      use: 'node-loader',
+    });
+
+    return config;
+  },
+});

package.json

@@ -53,6 +53,8 @@
     "embla-carousel-react": "^8.0.4",
     "express": "^4.19.2",
     "framer-motion": "^11.1.9",
+    "html2canvas": "^1.4.1",
+    "jspdf": "^2.5.1",
     "langchain": "^0.2.4",
     "lucide-react": "^0.378.0",
     "moment": "^2.30.1",
@@ -70,6 +72,7 @@
     "resend": "^3.3.0",
     "sharp": "^0.33.3",
     "sonner": "^1.5.0",
+    "svg2img": "^1.0.0-beta.2",
     "tailwind-merge": "^2.3.0",
     "tailwindcss-animate": "^1.0.7",
     "three": "^0.164.1",
@@ -84,6 +87,7 @@
     "editorjs-inline-image": "^2.1.1",
     "eslint": "^8.57.0",
     "eslint-config-next": "^14.2.3",
+    "node-loader": "^2.0.0",
     "postcss": "^8.4.38",
     "tailwindcss": "^3.4.3",
     "typescript": "^5.4.5"

src/app/workspace/[fileId]/page.tsx

@@ -1,29 +1,192 @@
 "use client";
-import React, { useEffect, useState } from "react";
+import React, { useEffect, useState, useRef, MutableRefObject } from "react";
 import WorkspaceHeader from "../_components/WorkspaceHeader";
 import Editor from "../_components/Editor";
 import { useConvex } from "convex/react";
 import { api } from "../../../../convex/_generated/api";
 import { FILE } from "../../dashboard/_components/FileList";
 import Canvas from "../_components/Canvas";
+import dynamic from 'next/dynamic';
+import EditorJS, { OutputData } from "@editorjs/editorjs";
+
+// Dynamic imports for server-side libraries
+const jsPDFPromise = import('jspdf');
+const excalidrawPromise = import('@excalidraw/excalidraw');
 
 function Workspace({ params }: any) {
   const [triggerSave, setTriggerSave] = useState(false);
   const convex = useConvex();
   const [fileData, setFileData] = useState<FILE | any>();
   const [fullScreen, setFullScreen] = useState(false);
+  const editorRef = useRef<EditorJS | null>(null);
+  const canvasRef = useRef<any>(null);
 
   useEffect(() => {
-    params.fileId && getFileData();
-  }, []);
+    if (params.fileId) {
+      getFileData();
+    }
+  }, [params.fileId]);
 
   const getFileData = async () => {
     const result = await convex.query(api.files.getFileById, {
       _id: params.fileId,
     });
     setFileData(result);
   };
-
+
+  const saveAsPdf = async () => {
+    const { default: jsPDF } = await jsPDFPromise;
+    const { exportToSvg } = await excalidrawPromise;
+
+    const editorInstance = editorRef.current;
+    const canvasInstance = canvasRef.current;
+
+    if (editorInstance && canvasInstance) {
+      const pdf = new jsPDF("p", "mm", "a4");
+
+      // Extract text content from the editor
+      editorInstance.save().then((editorContent: OutputData) => {
+        const pageWidth = pdf.internal.pageSize.getWidth();
+        const pageHeight = pdf.internal.pageSize.getHeight();
+        const margin = 10;
+        const textWidth = pageWidth - margin * 2;
+        const textHeight = pageHeight - margin * 2;
+        let y = margin;
+
+        editorContent.blocks.forEach((block: any) => {
+          let lines: any[] = [];
+
+          switch (block.type) {
+            case "paragraph":
+              lines = parseText(block.data.text);
+              break;
+            case "header":
+              pdf.setFontSize(16); // Set font size for header
+              lines = [{ text: block.data.text, style: 'header' }];
+              pdf.setFontSize(12); // Reset font size
+              break;
+            case "list":
+              lines = block.data.items.map((item: string) => ({ text: `• ${item}`, style: 'normal' }));
+              break;
+            // Add more cases if needed for different block types
+            default:
+              lines = [{ text: block.data.text, style: 'normal' }];
+          }
+
+          lines.forEach((line: any) => {
+            if (y + 10 > textHeight) {
+              pdf.addPage();
+              y = margin;
+            }
+
+            switch (line.style) {
+              case 'bold':
+                pdf.setFont("helvetica", "bold");
+                break;
+              case 'italic':
+                pdf.setFont("helvetica", "italic");
+                break;
+              case 'header':
+                pdf.setFont("helvetica", "bold");
+                const headerWidth = pdf.getStringUnitWidth(line.text) * 16 / pdf.internal.scaleFactor;
+                pdf.text(line.text, (pageWidth - headerWidth) / 2, y);
+                y += 10;
+                break;
+              default:
+                pdf.setFont("helvetica", "normal");
+            }
+
+            if (line.style !== 'header') {
+              // Split text if it's too wide and handle separately
+              const wrappedLines = pdf.splitTextToSize(line.text, textWidth);
+              wrappedLines.forEach((wrappedLine: string) => {
+                if (y + 10 > textHeight) {
+                  pdf.addPage();
+                  y = margin;
+                }
+                pdf.text(wrappedLine, margin, y);
+                y += 10;
+              });
+            }
+          });
+
+          // Reset font style and size after each block
+          pdf.setFont("helvetica", "normal");
+          pdf.setFontSize(12);
+        });
+
+        // Export flowchart as SVG from Excalidraw
+        const elements = canvasInstance.getSceneElements();
+        const appState = canvasInstance.getAppState();
+        const files = canvasInstance.getFiles();
+
+        exportToSvg({
+          elements: elements,
+          appState: { ...appState, exportBackground: false }, // No background
+          files: files,
+        }).then((svg: SVGSVGElement) => {
+          // Add heading for the flowchart
+          pdf.setFont("helvetica", "bold");
+          pdf.setFontSize(16); // Set font size for the heading
+          const headingText = "Flowchart";
+          const headingWidth = pdf.getStringUnitWidth(headingText) * pdf.internal.scaleFactor;
+          const headingX = (pageWidth - headingWidth) / 2;
+          pdf.text(headingText, headingX, y + 10);
+          pdf.setFontSize(12); // Reset font size
+          pdf.setFont("helvetica", "normal");
+          y += 20; // Adjust y position to avoid overlap with the heading
+
+          // Convert SVG to PNG using the Canvas API
+          const svgData = new XMLSerializer().serializeToString(svg);
+          const canvas = document.createElement("canvas");
+          const context = canvas.getContext("2d");
+          const img = new Image();
+
+          img.onload = () => {
+            if (context) {
+              canvas.width = img.width;
+              canvas.height = img.height;
+              context.drawImage(img, 0, 0);
+
+              const imgData = canvas.toDataURL("image/png");
+              const imgProps = pdf.getImageProperties(imgData);
+              const imgHeight = (imgProps.height * pageWidth) / imgProps.width;
+
+              // Add canvas image just below the heading
+              pdf.addImage(imgData, "PNG", margin, y, pageWidth - margin * 2, imgHeight);
+              y += imgHeight;
+
+              // Save the PDF
+              pdf.save("document.pdf");
+            } else {
+              console.error("Failed to get canvas context");
+            }
+          };
+
+          img.src = `data:image/svg+xml;base64,${btoa(svgData)}`;
+        });
+      });
+    } else {
+      console.error("Unable to find the content to save as PDF");
+    }
+  };
+
+  const parseText = (text: string) => {
+    const lines: any[] = [];
+    const parser = new DOMParser();
+    const parsedHtml = parser.parseFromString(text, 'text/html');
+    parsedHtml.body.childNodes.forEach((node: ChildNode) => {
+      if (node.nodeType === Node.TEXT_NODE) {
+        lines.push({ text: node.textContent, style: 'normal' });
+      } else if (node.nodeName === 'B') {
+        lines.push({ text: node.textContent, style: 'bold' });
+      } else if (node.nodeName === 'I') {
+        lines.push({ text: node.textContent, style: 'italic' });
+      }
+    });
+    return lines;
+  };
+
 
   return (
     <div className="overflow-x-hidden">
@@ -32,24 +195,21 @@ function Workspace({ params }: any) {
         name={fileData?.fileName || "New Document"}
         setFullScreen={setFullScreen}
         setFileData={setFileData}
+        onSaveAsPdf={saveAsPdf}
       />
 
-      <div className={`grid grid-cols-1 ${fullScreen ? "": "md:grid-cols-2"} overflow-x-none`}>
-        <div className={`${fullScreen ? "hidden" : "block"}
-        `}>
-            <Editor
-              onSaveTrigger={triggerSave}
-              fileId={params.fileId}
-              fileData={fileData}
-            />
-        </div> 
-        <div
-          className={`h-screen border-l`}
-        >
-          {/*Render the 
-          Canvas component here.
-          */}
+      <div className={`grid grid-cols-1 ${fullScreen ? "" : "md:grid-cols-2"} overflow-x-none`}>
+        <div className={`${fullScreen ? "hidden" : "block"}`}>
+          <Editor
+            ref={editorRef as MutableRefObject<EditorJS | null>}
+            onSaveTrigger={triggerSave}
+            fileId={params.fileId}
+            fileData={fileData}
+          />
+        </div>
+        <div className={`h-screen border-l`}>
           <Canvas
+            ref={canvasRef as MutableRefObject<any>}
             onSaveTrigger={triggerSave}
             fileId={params.fileId}
             fileData={fileData}

src/app/workspace/_components/Canvas.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useState } from "react";
+import React, { useEffect, useState, forwardRef, useImperativeHandle } from "react";
 import { Excalidraw, MainMenu, WelcomeScreen } from "@excalidraw/excalidraw";
 import { FILE } from "../../dashboard/_components/FileList";
 import { parseMermaidToExcalidraw } from "@excalidraw/mermaid-to-excalidraw";
@@ -7,19 +7,20 @@ import { useTheme } from "next-themes";
 import { api } from "../../../../convex/_generated/api";
 import { toast } from "sonner";
 
-function Canvas({
+const Canvas = forwardRef(({
   onSaveTrigger,
   fileId,
   fileData,
 }: {
   onSaveTrigger: any;
   fileId: any;
   fileData: FILE;
-}) {
+}, ref) => {
   const [whiteBoardData, setWhiteBoardData] = useState<any>();
   const { theme } = useTheme();
 
   const updateWhiteboard = useMutation(api.files.updateWhiteboard);
+
   useEffect(() => {
     onSaveTrigger && saveWhiteboard();
   }, [onSaveTrigger]);
@@ -33,7 +34,11 @@ function Canvas({
     });
   };
 
-
+  useImperativeHandle(ref, () => ({
+    getSceneElements: () => whiteBoardData,
+    getAppState: () => ({ viewBackgroundColor: "#e6e6e6" }),
+    getFiles: () => [], // Implement getFiles based on your app's requirements
+  }));
 
   const handleMermaidToExcalidraw = async () => {
     const mermaidCode = `flowchart TD
@@ -107,6 +112,6 @@ function Canvas({
       </div>
     </>
   );
-}
+});
 
 export default Canvas;