@cognipeer/chat-ui

A customizable React chat UI component library for AI agents. Features a ChatGPT-like dark theme, streaming support, file uploads, tool call visualization, and seamless integration with @cognipeer/agent-server.

Features

• 🎨 Customizable Theme - Dark/light modes with full color customization
• 📡 Streaming Support - Real-time SSE streaming with text updates
• 📁 File Uploads - Built-in file attachment support
• 🔧 Tool Call UI - Expandable tool call visualization
• 💬 Chat History - Sidebar with conversation history
• 🎯 Customizable Actions - Add feedback buttons or custom actions to messages
• 🌍 Internationalization - Built-in i18n with English and Turkish support
• ⚛️ React 18+ - Modern React with hooks
• 🎨 Tailwind CSS - Utility-first styling

Installation

npm install @cognipeer/chat-ui

Quick Start

Basic Usage with Agent Server

import { Chat } from "@cognipeer/chat-ui";
import "@cognipeer/chat-ui/styles.css";

function App() {
  return (
    <div className="h-screen">
      <Chat
        baseUrl="http://localhost:3000/api"
        agentId="my-agent"
        theme="dark"
      />
    </div>
  );
}

With Authentication

<Chat
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
  authorization="Bearer your-token-here"
  theme="dark"
/>

Without History Sidebar

import { ChatMinimal } from "@cognipeer/chat-ui";

<ChatMinimal
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
/>

Custom Theme

Using Theme Provider

import { Chat } from "@cognipeer/chat-ui";

<Chat
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
  theme="dark"
  themeColors={{
    bgPrimary: "#1a1a2e",
    bgSecondary: "#16213e",
    bgTertiary: "#0f3460",
    textPrimary: "#eaeaea",
    textSecondary: "#a0a0a0",
    accentPrimary: "#e94560",
  }}
/>

Direct Theme Provider Usage

import { ChatThemeProvider, useChatTheme } from "@cognipeer/chat-ui";

function MyChat() {
  const { theme, setTheme } = useChatTheme();
  
  return (
    <button onClick={() => setTheme({ mode: theme.mode === "dark" ? "light" : "dark" })}>
      Toggle Theme
    </button>
  );
}

function App() {
  return (
    <ChatThemeProvider defaultMode="dark">
      <MyChat />
    </ChatThemeProvider>
  );
}

Internationalization (i18n)

The library includes built-in internationalization support with English and Turkish translations. Language is detected from the URL query parameter (?lang=en or ?lang=tr). If no query parameter is provided, it defaults to English (or the specified defaultLocale).

Auto-detect from URL Query Parameter

// URL: https://example.com/chat?lang=tr
<Chat
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
/>
// Will automatically use Turkish

// URL: https://example.com/chat (no query parameter)
<Chat
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
/>
// Will use English (default)

Set Default Locale

<Chat
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
  defaultLocale="tr"
/>

Controlled Locale

import { useState } from "react";
import { Chat, type SupportedLocale } from "@cognipeer/chat-ui";

function App() {
  const [locale, setLocale] = useState<SupportedLocale>("en");
  
  return (
    <>
      <button onClick={() => setLocale(locale === "en" ? "tr" : "en")}>
        Switch Language
      </button>
      <Chat
        baseUrl="http://localhost:3000/api"
        agentId="my-agent"
        locale={locale}
        onLocaleChange={setLocale}
      />
    </>
  );
}

Using i18n Hook

import { useI18n } from "@cognipeer/chat-ui";

function MyComponent() {
  const { t, locale, setLocale } = useI18n();
  
  return (
    <div>
      <p>{t("chat.input.placeholder")}</p>
      <p>Current language: {locale}</p>
      <button onClick={() => setLocale(locale === "en" ? "tr" : "en")}>
        {locale === "en" ? "Türkçe" : "English"}
      </button>
    </div>
  );
}

Custom Messages

You can provide custom translations:

import { ChatI18nProvider } from "@cognipeer/chat-ui";

<ChatI18nProvider
  defaultLocale="en"
  customMessages={{
    en: {
      "chat.input.placeholder": "Write your message here...",
    },
    tr: {
      "chat.input.placeholder": "Mesajınızı buraya yazın...",
    },
  }}
>
  <Chat baseUrl="..." agentId="..." />
</ChatI18nProvider>

Supported Locales

• en - English (default)
• tr - Turkish

Language Detection:

1. URL query parameter (?lang=en or ?lang=tr)
2. Falls back to defaultLocale prop (default: en)

All UI strings are automatically translated including:

• Input placeholders
• Button labels
• Messages
• Tooltips
• Error messages

Custom Message Actions (Feedback)

import { Chat, ThumbsUpIcon, ThumbsDownIcon } from "@cognipeer/chat-ui";

function MessageActions({ message, isStreaming }) {
  if (isStreaming) return null;
  
  const handleFeedback = (type: "up" | "down") => {
    console.log(`Feedback ${type} for message:`, message.id);
    // Send feedback to your API
  };
  
  return (
    <div className="flex gap-2">
      <button
        onClick={() => handleFeedback("up")}
        className="p-1 hover:bg-gray-700 rounded"
      >
        <ThumbsUpIcon className="w-4 h-4" />
      </button>
      <button
        onClick={() => handleFeedback("down")}
        className="p-1 hover:bg-gray-700 rounded"
      >
        <ThumbsDownIcon className="w-4 h-4" />
      </button>
    </div>
  );
}

<Chat
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
  renderMessageActions={(props) => <MessageActions {...props} />}
/>

Using Hooks Directly

For more control, use the hooks directly:

import { useChat, ChatMessageList, ChatInput } from "@cognipeer/chat-ui";

function CustomChat() {
  const chat = useChat({
    baseUrl: "http://localhost:3000/api",
    agentId: "my-agent",
   locale` | `"en" \| "tr"` | - | Override locale (auto-detect if not set) |
| `defaultLocale` | `"en" \| "tr"` | `"en"` | Default locale |
| `onLocaleChange` | `function` | - | Callback when locale changes |
| ` streaming: true,
    onMessageReceived: (message) => {
      console.log("New message:", message);
    },
  });

  return (
    <div className="flex flex-col h-full">
      <ChatMessageList
        messages={chat.messages}
        isStreaming={chat.isLoading}
        streamingText={chat.streamingText}
      />
      <ChatInput
        onSend={chat.sendMessage}
        onStop={chat.stop}
        isLoading={chat.isLoading}
      />
    </div>
  );
}

File Uploads

<Chat
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
  enableFileUpload={true}
  allowedFileTypes={["image/*", ".pdf", ".txt"]}
  maxFileSize={10 * 1024 * 1024} // 10MB
  maxFiles={5}
/>

Custom Callbacks

<Chat
  baseUrl="http://localhost:3000/api"
  agentId="my-agent"
  onMessageSent={(message) => {
    console.log("User sent:", message);
  }}
  onMessageReceived={(message) => {
    console.log("Agent replied:", message);
  }}
  onStreamText={(chunk, fullText) => {
    console.log("Streaming:", chunk);
  }}
  onToolCall={(toolName, args) => {
    console.log("Tool called:", toolName, args);
  }}
  onToolResult={(toolName, result) => {
    console.log("Tool result:", toolName, result);
  }}
  onError={(error) => {
    console.error("Chat error:", error);
  }}
  onConversationCreated={(conversation) => {
    console.log("New conversation:", conversation);
  }}
  onConversationSelected={(conversation) => {
    console.log("Selected conversation:", conversation);
  }}
/>

Custom API Integration

For non-agent-server backends, use the API client or hooks with custom implementations:

import { useChat, AgentServerClient } from "@cognipeer/chat-ui";

// Create a custom client if needed
const customClient = new AgentServerClient({
  baseUrl: "https://your-api.com",
  agentId: "agent",
  headers: {
    "X-Custom-Header": "value",
  },
});

// Or extend the client class for fully custom implementations

Components API

<Chat>

Main chat component with all features.

Prop	Type	Default	Description
baseUrl	string	required	Base URL for the API
agentId	string	required	Agent ID to use
authorization	string	-	Authorization header value
headers	object	-	Custom headers
streaming	boolean	true	Enable streaming
showHistory	boolean	true	Show history sidebar
theme	"light" | "dark"	"dark"	Theme mode
themeColors	object	-	Custom colors
enableFileUpload	boolean	true	Enable file uploads
renderMessageActions	function	-	Custom message actions
renderAvatar	function	-	Custom avatar
renderEmptyState	function	-	Custom empty state
renderHeader	function	-	Custom header

<ChatMinimal>

Simplified chat without history sidebar.

<ChatMessage>

Individual message component.

<ChatMessageList>

List of messages with auto-scroll.

<ChatInput>

Input component with file upload support.

<ChatHistory>

History sidebar component.

<ToolCall> / <ToolCalls>

Tool call visualization components.

Hooks

useChat(options)

Main chat state management hook.

Returns:

• messages - Current messages
• conversation - Current conversation
• isLoading - Loading state
• streamingText - Current streaming text
• error - Current error
• pendingFiles - Files pending upload
• activeToolCalls - Active tool calls
• sendMessage(content) - Send a message
• addFiles(files) - Add files
• removeFile(id) - Remove a file
• clearMessages() - Clear messages
• loadConversation(id) - Load a conversation
• createConversation(title?) - Create new conversation
• retry() - Retry last message
• stop() - Stop generation

useChatHistory(options)

History management hook.

Returns:

• conversations - Conversation list
• isLoading - Loading state
• hasMore - Has more items
• load() - Load conversations

useI18n()

Internationalization hook.

Returns:

• t(key, values?) - Translate a key
• locale - Current locale ("en" or "tr")
• setLocale(locale) - Change locale (also updates URL query param)
• formatNumber(value, options?) - Format a number
• formatDate(value, options?) - Format a date
• formatRelativeTime(value, unit) - Format relative time
• loadMore() - Load more
• refresh() - Refresh list
• deleteConversation(id) - Delete conversation

Styling with Tailwind

The library uses CSS variables for theming. You can override them:

:root {
  --chat-bg-primary: #212121;
  --chat-bg-secondary: #171717;
  --chat-bg-tertiary: #2f2f2f;
  --chat-bg-hover: #3f3f3f;
  --chat-text-primary: #ececec;
  --chat-text-secondary: #b4b4b4;
  --chat-text-tertiary: #8e8e8e;
  --chat-text-inverse: #171717;
  --chat-border-primary: #3f3f3f;
  --chat-border-secondary: #2f2f2f;
  --chat-accent-primary: #10a37f;
  --chat-accent-secondary: #1a7f64;
}

Next.js Integration

// app/chat/page.tsx
"use client";

import { Chat } from "@cognipeer/chat-ui";
import "@cognipeer/chat-ui/styles.css";

export default function ChatPage() {
  return (
    <div className="h-screen">
      <Chat
        baseUrl="/api/agents"
        agentId="my-agent"
      />
    </div>
  );
}

License

MIT