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document.addEventListener('DOMContentLoaded', function() {
// DOM Elements
const chatForm = document.getElementById('chat-form');
const messageInput = document.getElementById('message-input');
const messagesContainer = document.getElementById('messages-container');
const newChatBtn = document.getElementById('new-chat-btn');
const modelSelect = document.getElementById('model-select');
const currentModelLabel = document.getElementById('current-model-label');
const historyList = document.getElementById('history-list');
// State variables
let chatHistory = [];
let conversations = loadConversations();
let currentConversationId = null;
// Load available models
loadModels();
// Start a new conversation
startNewConversation();
// Event listeners
chatForm.addEventListener('submit', handleChatSubmit);
newChatBtn.addEventListener('click', startNewConversation);
modelSelect.addEventListener('change', handleModelChange);
messageInput.addEventListener('keydown', handleInputKeydown);
// Auto-resize textarea as user types
messageInput.addEventListener('input', function() {
this.style.height = 'auto';
this.style.height = (this.scrollHeight) + 'px';
// Cap the height
if (parseInt(this.style.height) > 120) {
this.style.height = '120px';
}
});
// Load available models from the backend
function loadModels() {
fetch('/api/models')
.then(response => response.json())
.then(data => {
if (data.status === 'success') {
modelSelect.innerHTML = '';
data.models.forEach(model => {
const option = document.createElement('option');
option.value = model.id;
option.textContent = model.name;
modelSelect.appendChild(option);
});
}
})
.catch(error => {
console.error('Error loading models:', error);
});
}
// Handle model change
function handleModelChange() {
const selectedModel = modelSelect.value;
const selectedModelName = modelSelect.options[modelSelect.selectedIndex].text;
currentModelLabel.textContent = selectedModelName;
// Update current conversation model
if (currentConversationId) {
conversations[currentConversationId].model = selectedModel;
saveConversations();
}
}
// Handle chat submission
function handleChatSubmit(e) {
e.preventDefault();
const message = messageInput.value.trim();
if (!message) return;
// Add user message to UI
addMessageToUI('user', message);
// Add to chat history
chatHistory.push({
role: 'user',
content: message
});
// Update conversation title if it's the first message
if (chatHistory.length === 1) {
const title = message.substring(0, 30) + (message.length > 30 ? '...' : '');
conversations[currentConversationId].title = title;
updateConversationsList();
}
// Save to local storage
conversations[currentConversationId].messages = chatHistory;
saveConversations();
// Clear input
messageInput.value = '';
messageInput.style.height = 'auto';
// Show typing indicator
showTypingIndicator();
// Send to backend
const selectedModel = modelSelect.value;
fetch('/api/chat', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
messages: chatHistory,
model: selectedModel
})
})
.then(response => response.json())
.then(data => {
// Remove typing indicator
hideTypingIndicator();
if (data.status === 'success') {
// Add AI response to UI
addMessageToUI('ai', data.message);
// Add to chat history
chatHistory.push({
role: 'assistant',
content: data.message
});
// Save to local storage
conversations[currentConversationId].messages = chatHistory;
saveConversations();
// Scroll to bottom
scrollToBottom();
} else {
// Show error
addMessageToUI('system', `Error: ${data.message}`);
}
})
.catch(error => {
hideTypingIndicator();
console.error('Error:', error);
addMessageToUI('system', `Error: ${error.message || 'Failed to send message'}`);
});
// Scroll to bottom
scrollToBottom();
}
// Handle input keydown (for Enter key submission with Shift+Enter for new line)
function handleInputKeydown(e) {
if (e.key === 'Enter' && !e.shiftKey) {
e.preventDefault();
chatForm.dispatchEvent(new Event('submit'));
}
}
// Add message to UI
function addMessageToUI(sender, content) {
// Create a wrapper for each message group
let messageWrapper;
if (sender === 'system') {
messageWrapper = document.createElement('div');
messageWrapper.className = 'w-100 d-flex justify-content-center my-3';
const messageDiv = document.createElement('div');
messageDiv.className = 'system-message text-center';
messageDiv.innerHTML = `<p>${content}</p>`;
messageWrapper.appendChild(messageDiv);
} else {
messageWrapper = document.createElement('div');
messageWrapper.className = 'w-100 d-flex ' +
(sender === 'user' ? 'justify-content-end' : 'justify-content-start');
const messageDiv = renderMessage(content, sender === 'user');
messageWrapper.appendChild(messageDiv);
}
messagesContainer.appendChild(messageWrapper);
scrollToBottom();
}
// Show typing indicator
function showTypingIndicator() {
const typingWrapper = document.createElement('div');
typingWrapper.className = 'w-100 d-flex justify-content-start';
typingWrapper.id = 'typing-indicator-wrapper';
const typingDiv = document.createElement('div');
typingDiv.className = 'typing-indicator ai-message';
typingDiv.id = 'typing-indicator';
typingDiv.innerHTML = `
<div class="typing-dot"></div>
<div class="typing-dot"></div>
<div class="typing-dot"></div>
`;
typingWrapper.appendChild(typingDiv);
messagesContainer.appendChild(typingWrapper);
scrollToBottom();
}
// Hide typing indicator
function hideTypingIndicator() {
const typingWrapper = document.getElementById('typing-indicator-wrapper');
if (typingWrapper) {
typingWrapper.remove();
}
}
// Scroll to bottom of messages container
function scrollToBottom() {
messagesContainer.scrollTop = messagesContainer.scrollHeight;
}
// Start a new conversation
function startNewConversation() {
// Clear chat history
chatHistory = [];
// Clear messages container
messagesContainer.innerHTML = `
<div class="system-message text-center my-5">
<h3>Welcome to AI Chat</h3>
<p class="text-muted">Ask me anything! I'm powered by g4f and ready to help.</p>
</div>
`;
// Create a new conversation ID
currentConversationId = Date.now().toString();
// Add to conversations object
conversations[currentConversationId] = {
id: currentConversationId,
title: 'New Conversation',
model: modelSelect.value,
messages: []
};
// Save to local storage
saveConversations();
// Update UI
updateConversationsList();
}
// Load conversation by ID
function loadConversation(id) {
if (!conversations[id]) return;
// Set current conversation ID
currentConversationId = id;
// Load chat history
chatHistory = conversations[id].messages || [];
// Set model
if (conversations[id].model) {
modelSelect.value = conversations[id].model;
const selectedModelName = modelSelect.options[modelSelect.selectedIndex].text;
currentModelLabel.textContent = selectedModelName;
}
// Clear messages container
messagesContainer.innerHTML = '';
// Add messages to UI
if (chatHistory.length === 0) {
messagesContainer.innerHTML = `
<div class="system-message text-center my-5">
<h3>Welcome to AI Chat</h3>
<p class="text-muted">Ask me anything! I'm powered by g4f and ready to help.</p>
</div>
`;
} else {
chatHistory.forEach(msg => {
if (msg.role === 'user') {
addMessageToUI('user', msg.content);
} else if (msg.role === 'assistant') {
addMessageToUI('ai', msg.content);
} else if (msg.role === 'system') {
addMessageToUI('system', msg.content);
}
});
}
// Update UI
updateConversationsList();
}
// Update conversations list in sidebar
function updateConversationsList() {
historyList.innerHTML = '';
// Sort conversations by ID (newest first)
const sortedIds = Object.keys(conversations).sort((a, b) => b - a);
sortedIds.forEach(id => {
const conv = conversations[id];
const item = document.createElement('li');
item.className = `list-group-item history-item d-flex justify-content-between align-items-center ${id === currentConversationId ? 'active' : ''}`;
const titleSpan = document.createElement('span');
titleSpan.textContent = conv.title;
titleSpan.style.cursor = 'pointer';
titleSpan.addEventListener('click', () => {
loadConversation(id);
});
const deleteBtn = document.createElement('button');
deleteBtn.className = 'btn btn-sm btn-danger';
deleteBtn.innerHTML = '<i class="fas fa-trash"></i>';
deleteBtn.addEventListener('click', (e) => {
e.stopPropagation();
deleteConversation(id);
});
item.appendChild(titleSpan);
item.appendChild(deleteBtn);
item.dataset.id = id;
historyList.appendChild(item);
});
}
// Load conversations from local storage
function loadConversations() {
try {
const saved = localStorage.getItem('g4f_conversations');
return saved ? JSON.parse(saved) : {};
} catch (error) {
console.error('Error loading conversations:', error);
return {};
}
}
// Save conversations to local storage
function saveConversations() {
try {
localStorage.setItem('g4f_conversations', JSON.stringify(conversations));
} catch (error) {
console.error('Error saving conversations:', error);
}
}
// Delete specific conversation
function deleteConversation(id) {
if (confirm('Are you sure you want to delete this conversation? This cannot be undone.')) {
fetch(`/api/conversations/${id}`, {
method: 'DELETE',
})
.then(response => response.json())
.then(data => {
if (data.status === 'success') {
delete conversations[id];
// If current conversation was deleted, start a new one
if (id === currentConversationId) {
startNewConversation();
}
saveConversations();
updateConversationsList();
addMessageToUI('system', 'Conversation deleted');
}
})
.catch(error => {
console.error('Error:', error);
addMessageToUI('system', 'Failed to delete conversation');
});
}
}
function renderMessage(content, isUser = false) {
const messageDiv = document.createElement('div');
messageDiv.className = `message ${isUser ? 'user-message' : 'ai-message'}`;
if (!isUser) {
const formattedContent = marked.parse(content);
messageDiv.innerHTML = formattedContent;
// Add copy buttons and language labels to code blocks
messageDiv.querySelectorAll('pre code').forEach((block) => {
hljs.highlightElement(block);
const pre = block.parentElement;
const language = block.className.split('-')[1] || 'plaintext';
pre.setAttribute('data-language', language);
const copyBtn = document.createElement('button');
copyBtn.className = 'copy-btn';
copyBtn.innerHTML = '<i class="fas fa-copy"></i>';
copyBtn.onclick = async () => {
await navigator.clipboard.writeText(block.textContent);
copyBtn.innerHTML = '<i class="fas fa-check"></i>';
setTimeout(() => {
copyBtn.innerHTML = '<i class="fas fa-copy"></i>';
}, 2000);
};
pre.appendChild(copyBtn);
});
} else {
messageDiv.textContent = content;
}
return messageDiv;
}
}); |