${message.content}

` \n : `

\n \n

`;\n \n return `\n

\n ${!isUser ? `\n

\n ${avatarSvg}\n

\n ` : ''}\n

\n ${contentHtml}\n

\n ${new Date(message.timestamp).toLocaleTimeString()}\n

\n ${isUser ? `\n

\n ${avatarSvg}\n

\n ` : ''}\n

\n `;\n}\n\n// Routes\n// Serve static files\napp.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\n\n// Main route - serve the HTML\napp.get(\"/\", async c => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n \n // Get project info for the \"View Source\" link\n const projectInfo = parseProject(import.meta.url);\n const viewSourceUrl = projectInfo.links.self.project;\n \n // Replace the placeholder with the actual URL\n html = html.replace(\"{{VIEW_SOURCE_URL}}\", viewSourceUrl);\n \n return c.html(html);\n});\n\n// Chat endpoint\napp.post(\"/chat\", async c => {\n const formData = await c.req.formData();\n const userMessage = formData.get(\"message\")?.toString() || \"\";\n \n if (!userMessage.trim()) {\n return c.text(\"Message cannot be empty\", 400);\n }\n \n // Get existing chat history\n const history = await getChatHistory();\n \n // Add user message\n const newUserMessage: Message = {\n role: \"user\",\n content: userMessage,\n timestamp: Date.now(),\n };\n history.messages.push(newUserMessage);\n \n // Save history with user message\n await saveChatHistory(history);\n \n // Render the user message\n let responseHtml = renderMessage(newUserMessage);\n \n try {\n // Generate AI response\n const aiResponseText = await generateAIResponse(history.messages);\n \n // Add AI response to history\n const aiMessage: Message = {\n role: \"assistant\",\n content: aiResponseText,\n timestamp: Date.now(),\n };\n history.messages.push(aiMessage);\n \n // Save updated history\n await saveChatHistory(history);\n \n // Render the AI message\n responseHtml += renderMessage(aiMessage);\n } catch (error) {\n console.error(\"Error generating AI response:\", error);\n \n // Add error message\n const errorMessage: Message = {\n role: \"assistant\",\n content: \"I'm sorry, I encountered an error while processing your request. Please try again later.\",\n timestamp: Date.now(),\n };\n history.messages.push(errorMessage);\n await saveChatHistory(history);\n \n // Render the error message\n responseHtml += renderMessage(errorMessage);\n }\n \n return c.html(responseHtml);\n});\n\n// Clear chat history\napp.post(\"/clear-chat\", async c => {\n await saveChatHistory({ messages: [] });\n \n // Return the initial welcome message\n const welcomeMessage: Message = {\n role: \"assistant\",\n content: \"Hello! I'm your AI assistant powered by Gemini 2.0. How can I help you today?\",\n timestamp: Date.now(),\n };\n \n return c.html(renderMessage(welcomeMessage));\n});\n\n// Export the Hono app for HTTP val\nexport default app.fetch;","deleted","label",[168,149],"backend","permalink","https://www.val.town/x/yuxiaoy/demo/code/backend/index.ts","extension","actionData","errors"]