feat(chat): allow export as pdf or markdown

src/components/Navbar.tsx

@@ -1,8 +1,122 @@
-import { Clock, Edit, Share, Trash } from 'lucide-react';
+import { Clock, Edit, Share, Trash, FileText, FileDown } from 'lucide-react';
 import { Message } from './ChatWindow';
-import { useEffect, useState } from 'react';
+import { useEffect, useState, Fragment } from 'react';
 import { formatTimeDifference } from '@/lib/utils';
 import DeleteChat from './DeleteChat';
+import {
+  Popover,
+  PopoverButton,
+  PopoverPanel,
+  Transition,
+} from '@headlessui/react';
+import jsPDF from 'jspdf';
+
+const downloadFile = (filename: string, content: string, type: string) => {
+  const blob = new Blob([content], { type });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = filename;
+  document.body.appendChild(a);
+  a.click();
+  setTimeout(() => {
+    document.body.removeChild(a);
+    URL.revokeObjectURL(url);
+  }, 0);
+};
+
+const exportAsMarkdown = (messages: Message[], title: string) => {
+  const date = new Date(messages[0]?.createdAt || Date.now()).toLocaleString();
+  let md = `# 💬 Chat Export: ${title}\n\n`;
+  md += `*Exported on: ${date}*\n\n---\n`;
+  messages.forEach((msg, idx) => {
+    md += `\n---\n`;
+    md += `**${msg.role === 'user' ? '🧑 User' : '🤖 Assistant'}**  
+`;
+    md += `*${new Date(msg.createdAt).toLocaleString()}*\n\n`;
+    md += `> ${msg.content.replace(/\n/g, '\n> ')}\n`;
+    if (msg.sources && msg.sources.length > 0) {
+      md += `\n**Citations:**\n`;
+      msg.sources.forEach((src: any, i: number) => {
+        const url = src.metadata?.url || '';
+        md += `- [${i + 1}] [${url}](${url})\n`;
+      });
+    }
+  });
+  md += '\n---\n';
+  downloadFile(`${title || 'chat'}.md`, md, 'text/markdown');
+};
+
+const exportAsPDF = (messages: Message[], title: string) => {
+  const doc = new jsPDF();
+  const date = new Date(messages[0]?.createdAt || Date.now()).toLocaleString();
+  let y = 15;
+  const pageHeight = doc.internal.pageSize.height;
+  doc.setFontSize(18);
+  doc.text(`Chat Export: ${title}`, 10, y);
+  y += 8;
+  doc.setFontSize(11);
+  doc.setTextColor(100);
+  doc.text(`Exported on: ${date}`, 10, y);
+  y += 8;
+  doc.setDrawColor(200);
+  doc.line(10, y, 200, y);
+  y += 6;
+  doc.setTextColor(30);
+  messages.forEach((msg, idx) => {
+    if (y > pageHeight - 30) {
+      doc.addPage();
+      y = 15;
+    }
+    doc.setFont('helvetica', 'bold');
+    doc.text(`${msg.role === 'user' ? 'User' : 'Assistant'}`, 10, y);
+    doc.setFont('helvetica', 'normal');
+    doc.setFontSize(10);
+    doc.setTextColor(120);
+    doc.text(`${new Date(msg.createdAt).toLocaleString()}`, 40, y);
+    y += 6;
+    doc.setTextColor(30);
+    doc.setFontSize(12);
+    const lines = doc.splitTextToSize(msg.content, 180);
+    for (let i = 0; i < lines.length; i++) {
+      if (y > pageHeight - 20) {
+        doc.addPage();
+        y = 15;
+      }
+      doc.text(lines[i], 12, y);
+      y += 6;
+    }
+    if (msg.sources && msg.sources.length > 0) {
+      doc.setFontSize(11);
+      doc.setTextColor(80);
+      if (y > pageHeight - 20) {
+        doc.addPage();
+        y = 15;
+      }
+      doc.text('Citations:', 12, y);
+      y += 5;
+      msg.sources.forEach((src: any, i: number) => {
+        const url = src.metadata?.url || '';
+        if (y > pageHeight - 15) {
+          doc.addPage();
+          y = 15;
+        }
+        doc.text(`- [${i + 1}] ${url}`, 15, y);
+        y += 5;
+      });
+      doc.setTextColor(30);
+    }
+    y += 6;
+    doc.setDrawColor(230);
+    if (y > pageHeight - 10) {
+      doc.addPage();
+      y = 15;
+    }
+    doc.line(10, y, 200, y);
+    y += 4;
+  });
+  doc.save(`${title || 'chat'}.pdf`);
+};
 
 const Navbar = ({
   chatId,
@@ -59,10 +173,39 @@ const Navbar = ({
       <p className="hidden lg:flex">{title}</p>
 
       <div className="flex flex-row items-center space-x-4">
-        <Share
-          size={17}
-          className="active:scale-95 transition duration-100 cursor-pointer"
-        />
+        <Popover className="relative">
+          <PopoverButton className="active:scale-95 transition duration-100 cursor-pointer p-2 rounded-full hover:bg-light-secondary dark:hover:bg-dark-secondary">
+            <Share size={17} />
+          </PopoverButton>
+          <Transition
+            as={Fragment}
+            enter="transition ease-out duration-100"
+            enterFrom="opacity-0 translate-y-1"
+            enterTo="opacity-100 translate-y-0"
+            leave="transition ease-in duration-75"
+            leaveFrom="opacity-100 translate-y-0"
+            leaveTo="opacity-0 translate-y-1"
+          >
+            <PopoverPanel className="absolute right-0 mt-2 w-64 rounded-xl shadow-xl bg-light-primary dark:bg-dark-primary border border-light-200 dark:border-dark-200 z-50">
+              <div className="flex flex-col py-3 px-3 gap-2">
+                <button
+                  className="flex items-center gap-2 px-4 py-2 text-left hover:bg-light-secondary dark:hover:bg-dark-secondary transition-colors text-black dark:text-white rounded-lg font-medium"
+                  onClick={() => exportAsMarkdown(messages, title || '')}
+                >
+                  <FileText size={17} className="text-[#24A0ED]" />
+                  Export as Markdown
+                </button>
+                <button
+                  className="flex items-center gap-2 px-4 py-2 text-left hover:bg-light-secondary dark:hover:bg-dark-secondary transition-colors text-black dark:text-white rounded-lg font-medium"
+                  onClick={() => exportAsPDF(messages, title || '')}
+                >
+                  <FileDown size={17} className="text-[#24A0ED]" />
+                  Export as PDF
+                </button>
+              </div>
+            </PopoverPanel>
+          </Transition>
+        </Popover>
         <DeleteChat redirect chatId={chatId} chats={[]} setChats={() => {}} />
       </div>
     </div>