feat: implement AI chat functionality with new API route and chat component

env.example

@@ -181,6 +181,7 @@ CRON_JOBS_PASSWORD=""
 # AI
 # https://mksaas.com/docs/ai
 # -----------------------------------------------------------------------------
+AI_GATEWAY_API_KEY=""
 FAL_API_KEY=""
 FIREWORKS_API_KEY=""
 OPENAI_API_KEY=""

src/app/[locale]/(marketing)/ai/chat/page.tsx

@@ -0,0 +1,183 @@
+'use client';
+
+import {
+  Conversation,
+  ConversationContent,
+  ConversationScrollButton,
+} from '@/components/ai-elements/conversation';
+import { Loader } from '@/components/ai-elements/loader';
+import { Message, MessageContent } from '@/components/ai-elements/message';
+import {
+  PromptInput,
+  PromptInputButton,
+  PromptInputModelSelect,
+  PromptInputModelSelectContent,
+  PromptInputModelSelectItem,
+  PromptInputModelSelectTrigger,
+  PromptInputModelSelectValue,
+  PromptInputSubmit,
+  PromptInputTextarea,
+  PromptInputToolbar,
+  PromptInputTools,
+} from '@/components/ai-elements/prompt-input';
+import {
+  Reasoning,
+  ReasoningContent,
+  ReasoningTrigger,
+} from '@/components/ai-elements/reasoning';
+import { Response } from '@/components/ai-elements/response';
+import {
+  Source,
+  Sources,
+  SourcesContent,
+  SourcesTrigger,
+} from '@/components/ai-elements/source';
+import { useChat } from '@ai-sdk/react';
+import { GlobeIcon } from 'lucide-react';
+import { useState } from 'react';
+
+const models = [
+  {
+    name: 'GPT 4o',
+    value: 'openai/gpt-4o',
+  },
+  {
+    name: 'Deepseek R1',
+    value: 'deepseek/deepseek-r1',
+  },
+];
+
+const ChatBotDemo = () => {
+  const [input, setInput] = useState('');
+  const [model, setModel] = useState<string>(models[0].value);
+  const [webSearch, setWebSearch] = useState(false);
+  const { messages, sendMessage, status } = useChat();
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (input.trim()) {
+      sendMessage(
+        { text: input },
+        {
+          body: {
+            model: model,
+            webSearch: webSearch,
+          },
+        }
+      );
+      setInput('');
+    }
+  };
+
+  return (
+    <div className="max-w-4xl mx-auto p-6 relative size-full h-screen rounded-lg bg-muted/50">
+      <div className="flex flex-col h-full">
+        <Conversation className="h-full">
+          <ConversationContent>
+            {messages.map((message) => (
+              <div key={message.id}>
+                {message.role === 'assistant' && (
+                  <Sources>
+                    {message.parts.map((part, i) => {
+                      switch (part.type) {
+                        case 'source-url':
+                          return (
+                            <>
+                              <SourcesTrigger
+                                count={
+                                  message.parts.filter(
+                                    (part) => part.type === 'source-url'
+                                  ).length
+                                }
+                              />
+                              <SourcesContent key={`${message.id}-${i}`}>
+                                <Source
+                                  key={`${message.id}-${i}`}
+                                  href={part.url}
+                                  title={part.url}
+                                />
+                              </SourcesContent>
+                            </>
+                          );
+                      }
+                    })}
+                  </Sources>
+                )}
+                <Message from={message.role} key={message.id}>
+                  <MessageContent>
+                    {message.parts.map((part, i) => {
+                      switch (part.type) {
+                        case 'text':
+                          return (
+                            <Response key={`${message.id}-${i}`}>
+                              {part.text}
+                            </Response>
+                          );
+                        case 'reasoning':
+                          return (
+                            <Reasoning
+                              key={`${message.id}-${i}`}
+                              className="w-full"
+                              isStreaming={status === 'streaming'}
+                            >
+                              <ReasoningTrigger />
+                              <ReasoningContent>{part.text}</ReasoningContent>
+                            </Reasoning>
+                          );
+                        default:
+                          return null;
+                      }
+                    })}
+                  </MessageContent>
+                </Message>
+              </div>
+            ))}
+            {status === 'submitted' && <Loader />}
+          </ConversationContent>
+          <ConversationScrollButton />
+        </Conversation>
+
+        <PromptInput onSubmit={handleSubmit} className="mt-4">
+          <PromptInputTextarea
+            onChange={(e) => setInput(e.target.value)}
+            value={input}
+          />
+          <PromptInputToolbar>
+            <PromptInputTools>
+              <PromptInputButton
+                variant={webSearch ? 'default' : 'ghost'}
+                onClick={() => setWebSearch(!webSearch)}
+              >
+                <GlobeIcon size={16} />
+                <span>Search</span>
+              </PromptInputButton>
+              <PromptInputModelSelect
+                onValueChange={(value) => {
+                  setModel(value);
+                }}
+                value={model}
+              >
+                <PromptInputModelSelectTrigger>
+                  <PromptInputModelSelectValue />
+                </PromptInputModelSelectTrigger>
+                <PromptInputModelSelectContent>
+                  {models.map((model) => (
+                    <PromptInputModelSelectItem
+                      key={model.value}
+                      value={model.value}
+                    >
+                      {model.name}
+                    </PromptInputModelSelectItem>
+                  ))}
+                </PromptInputModelSelectContent>
+              </PromptInputModelSelect>
+            </PromptInputTools>
+            <PromptInputSubmit disabled={!input} status={status} />
+          </PromptInputToolbar>
+        </PromptInput>
+      </div>
+    </div>
+  );
+};
+
+export default ChatBotDemo;

src/app/api/chat/route.ts

@@ -0,0 +1,26 @@
+import { type UIMessage, convertToModelMessages, streamText } from 'ai';
+
+// Allow streaming responses up to 30 seconds
+export const maxDuration = 30;
+
+export async function POST(req: Request) {
+  const {
+    messages,
+    model,
+    webSearch,
+  }: { messages: UIMessage[]; model: string; webSearch: boolean } =
+    await req.json();
+
+  const result = streamText({
+    model: webSearch ? 'perplexity/sonar' : model,
+    messages: convertToModelMessages(messages),
+    system:
+      'You are a helpful assistant that can answer questions and help with tasks',
+  });
+
+  // send sources and reasoning back to the client
+  return result.toUIMessageStreamResponse({
+    sendSources: true,
+    sendReasoning: true,
+  });
+}