| 1 |
<?php |
| 2 |
if (!defined('ABSPATH')) { |
| 3 |
exit; |
| 4 |
} |
| 5 |
|
| 6 |
class MxChat_Integrator { |
| 7 |
private $options; |
| 8 |
private $chat_count; |
| 9 |
|
| 10 |
public function __construct() { |
| 11 |
$this->options = get_option('mxchat_options'); |
| 12 |
$this->chat_count = get_option('mxchat_chat_count', 0); |
| 13 |
|
| 14 |
add_action('wp_enqueue_scripts', array($this, 'mxchat_enqueue_scripts_styles')); |
| 15 |
add_action('wp_ajax_mxchat_handle_chat_request', array($this, 'mxchat_handle_chat_request')); |
| 16 |
add_action('wp_ajax_nopriv_mxchat_handle_chat_request', array($this, 'mxchat_handle_chat_request')); |
| 17 |
add_action('wp_ajax_mxchat_dismiss_pre_chat_message', array($this, 'mxchat_dismiss_pre_chat_message')); |
| 18 |
add_action('wp_ajax_nopriv_mxchat_dismiss_pre_chat_message', array($this, 'mxchat_dismiss_pre_chat_message')); |
| 19 |
|
| 20 |
|
| 21 |
if (!wp_next_scheduled('mxchat_reset_rate_limits')) { |
| 22 |
wp_schedule_event(time(), 'daily', 'mxchat_reset_rate_limits'); |
| 23 |
} |
| 24 |
|
| 25 |
add_action('mxchat_reset_rate_limits', array($this, 'mxchat_reset_rate_limits')); |
| 26 |
} |
| 27 |
|
| 28 |
private function mxchat_increment_chat_count() { |
| 29 |
$chat_count = get_option('mxchat_chat_count', 0); |
| 30 |
$chat_count++; |
| 31 |
update_option('mxchat_chat_count', $chat_count); |
| 32 |
} |
| 33 |
|
| 34 |
public function mxchat_fetch_conversation_history_for_ajax($session_id) { |
| 35 |
global $wpdb; |
| 36 |
$table_name = $wpdb->prefix . 'mxchat_chat_transcripts'; |
| 37 |
|
| 38 |
// Prepare and execute the query safely |
| 39 |
$chat_transcripts = $wpdb->get_results( |
| 40 |
$wpdb->prepare("SELECT * FROM $table_name WHERE session_id = %s ORDER BY timestamp ASC", sanitize_text_field($session_id)) |
| 41 |
); |
| 42 |
|
| 43 |
// Check if results are empty |
| 44 |
if (empty($chat_transcripts)) { |
| 45 |
return []; |
| 46 |
} |
| 47 |
|
| 48 |
// Build the conversation history |
| 49 |
$conversation_history = []; |
| 50 |
foreach ($chat_transcripts as $transcript) { |
| 51 |
$conversation_history[] = [ |
| 52 |
'role' => $transcript->role, |
| 53 |
'content' => $transcript->message |
| 54 |
]; |
| 55 |
} |
| 56 |
|
| 57 |
return $conversation_history; |
| 58 |
} |
| 59 |
|
| 60 |
|
| 61 |
private function mxchat_save_chat_message($session_id, $role, $message) { |
| 62 |
global $wpdb; |
| 63 |
$table_name = $wpdb->prefix . 'mxchat_chat_transcripts'; |
| 64 |
|
| 65 |
$wpdb->insert($table_name, [ |
| 66 |
'user_id' => 0, |
| 67 |
'session_id' => $session_id, |
| 68 |
'role' => $role, |
| 69 |
'message' => $message, |
| 70 |
'timestamp' => current_time('mysql', 1) |
| 71 |
]); |
| 72 |
} |
| 73 |
|
| 74 |
|
| 75 |
|
| 76 |
public function mxchat_handle_chat_request() { |
| 77 |
global $wpdb; |
| 78 |
|
| 79 |
// Get and sanitize the user identifier |
| 80 |
$user_id = $this->mxchat_get_user_identifier(); |
| 81 |
$user_id = sanitize_key($user_id); |
| 82 |
|
| 83 |
// Manage rate limiting |
| 84 |
$rate_limit_transient_key = 'mxchat_chat_limit_' . $user_id; |
| 85 |
$chat_count = get_transient($rate_limit_transient_key); |
| 86 |
$session_transient_key = 'mxchat_chat_session_' . $user_id; |
| 87 |
$session_id = get_transient($session_transient_key); |
| 88 |
|
| 89 |
if ($chat_count === false) { |
| 90 |
$chat_count = 0; |
| 91 |
} |
| 92 |
|
| 93 |
if ($session_id === false) { |
| 94 |
$session_id = uniqid('mxchat_chat_', true); |
| 95 |
set_transient($session_transient_key, $session_id, DAY_IN_SECONDS); // Store session ID for a day |
| 96 |
} |
| 97 |
|
| 98 |
$rate_limit_option = isset($this->options['rate_limit']) ? $this->options['rate_limit'] : 'unlimited'; |
| 99 |
|
| 100 |
// Check if rate limit is not 'unlimited' |
| 101 |
if ($rate_limit_option !== 'unlimited') { |
| 102 |
$rate_limit = intval($rate_limit_option); |
| 103 |
|
| 104 |
if ($chat_count >= $rate_limit) { |
| 105 |
wp_send_json_error('Rate limit exceeded. Please try again later.'); |
| 106 |
wp_die(); |
| 107 |
} |
| 108 |
set_transient($rate_limit_transient_key, $chat_count + 1, DAY_IN_SECONDS); |
| 109 |
} |
| 110 |
|
| 111 |
// Validate and sanitize the incoming message |
| 112 |
if (!isset($_POST['message'])) { |
| 113 |
wp_send_json_error('No message received'); |
| 114 |
wp_die(); |
| 115 |
} |
| 116 |
|
| 117 |
$message = sanitize_text_field($_POST['message']); |
| 118 |
if (empty($message)) { |
| 119 |
wp_send_json_error('Message is empty or invalid.'); |
| 120 |
wp_die(); |
| 121 |
} |
| 122 |
|
| 123 |
// Save the user message to the database |
| 124 |
$this->mxchat_save_chat_message($session_id, 'user', $message); |
| 125 |
|
| 126 |
// Generate and validate the embedding |
| 127 |
$user_message_embedding = $this->mxchat_generate_embedding($message, $this->options['api_key']); |
| 128 |
if (!is_array($user_message_embedding)) { |
| 129 |
wp_send_json_error('Error processing your message.'); |
| 130 |
wp_die(); |
| 131 |
} |
| 132 |
|
| 133 |
// Find relevant content based on embedding |
| 134 |
$relevant_content = $this->mxchat_find_relevant_content($user_message_embedding); |
| 135 |
|
| 136 |
// Fetch conversation history from the database |
| 137 |
$conversation_history = $this->mxchat_fetch_conversation_history_for_ajax($session_id); |
| 138 |
|
| 139 |
// Increment the chat count |
| 140 |
$this->mxchat_increment_chat_count(); |
| 141 |
|
| 142 |
// Generate a response from the AI model |
| 143 |
$response = $this->mxchat_generate_response($relevant_content, $this->options['api_key'], $conversation_history); |
| 144 |
|
| 145 |
// Save the bot response to the database |
| 146 |
$this->mxchat_save_chat_message($session_id, 'bot', $response); |
| 147 |
|
| 148 |
// Send the response back to the client |
| 149 |
wp_send_json(['message' => $response]); |
| 150 |
|
| 151 |
wp_die(); |
| 152 |
} |
| 153 |
|
| 154 |
|
| 155 |
private function mxchat_get_user_identifier() { |
| 156 |
return sanitize_text_field($_SERVER['REMOTE_ADDR']); |
| 157 |
} |
| 158 |
|
| 159 |
|
| 160 |
|
| 161 |
private function mxchat_generate_embedding($text, $api_key) { |
| 162 |
$endpoint = 'https://api.openai.com/v1/embeddings'; |
| 163 |
|
| 164 |
$body = wp_json_encode([ |
| 165 |
'input' => $text, |
| 166 |
'model' => 'text-embedding-ada-002' |
| 167 |
]); |
| 168 |
|
| 169 |
$args = [ |
| 170 |
'body' => $body, |
| 171 |
'headers' => [ |
| 172 |
'Content-Type' => 'application/json', |
| 173 |
'Authorization' => 'Bearer ' . $api_key, |
| 174 |
], |
| 175 |
'timeout' => 60, |
| 176 |
'redirection' => 5, |
| 177 |
'blocking' => true, |
| 178 |
'httpversion' => '1.0', |
| 179 |
'sslverify' => true, |
| 180 |
]; |
| 181 |
|
| 182 |
$response = wp_remote_post($endpoint, $args); |
| 183 |
|
| 184 |
if (is_wp_error($response)) { |
| 185 |
return null; |
| 186 |
} |
| 187 |
|
| 188 |
$response_body = json_decode(wp_remote_retrieve_body($response), true); |
| 189 |
|
| 190 |
if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) { |
| 191 |
return $response_body['data'][0]['embedding']; |
| 192 |
} else { |
| 193 |
return null; |
| 194 |
} |
| 195 |
} |
| 196 |
|
| 197 |
private function mxchat_find_relevant_content($user_embedding) { |
| 198 |
global $wpdb; |
| 199 |
$system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content'; |
| 200 |
|
| 201 |
// Define a cache key for embeddings |
| 202 |
$cache_key = 'mxchat_system_prompt_embeddings'; |
| 203 |
|
| 204 |
// Attempt to get the embeddings from the cache |
| 205 |
$embeddings = wp_cache_get($cache_key, 'mxchat_system_prompts'); |
| 206 |
|
| 207 |
if ($embeddings === false) { |
| 208 |
// Cache miss, query the database and cache the results |
| 209 |
$query = "SELECT id, embedding_vector FROM {$system_prompt_table}"; |
| 210 |
$embeddings = $wpdb->get_results($query); |
| 211 |
|
| 212 |
if ($embeddings === null || empty($embeddings)) { |
| 213 |
error_log("No embeddings found in the database."); |
| 214 |
return null; // Return null to handle no embeddings gracefully |
| 215 |
} |
| 216 |
|
| 217 |
// Cache the results if successful |
| 218 |
wp_cache_set($cache_key, $embeddings, 'mxchat_system_prompts', 3600); // Cache for 1 hour |
| 219 |
} |
| 220 |
|
| 221 |
$most_relevant_id = null; |
| 222 |
$highest_similarity = -INF; |
| 223 |
|
| 224 |
foreach ($embeddings as $embedding) { |
| 225 |
$database_embedding = maybe_unserialize($embedding->embedding_vector); |
| 226 |
|
| 227 |
// Debugging: Log the embeddings |
| 228 |
if (!is_array($database_embedding)) { |
| 229 |
error_log("Invalid database embedding format for ID {$embedding->id}: " . print_r($database_embedding, true)); |
| 230 |
continue; |
| 231 |
} |
| 232 |
|
| 233 |
if (is_array($user_embedding)) { |
| 234 |
$similarity = $this->mxchat_calculate_cosine_similarity($user_embedding, $database_embedding); |
| 235 |
|
| 236 |
// Debugging: Log the similarity score |
| 237 |
error_log("Calculated similarity for ID {$embedding->id}: {$similarity}"); |
| 238 |
|
| 239 |
if ($similarity > $highest_similarity) { |
| 240 |
$highest_similarity = $similarity; |
| 241 |
$most_relevant_id = $embedding->id; |
| 242 |
} |
| 243 |
} else { |
| 244 |
error_log("User embedding is not an array. Embedding data: " . print_r($user_embedding, true)); |
| 245 |
} |
| 246 |
} |
| 247 |
|
| 248 |
if ($most_relevant_id !== null) { |
| 249 |
// Define a cache key for the relevant content |
| 250 |
$content_cache_key = 'mxchat_article_content_' . $most_relevant_id; |
| 251 |
|
| 252 |
// Attempt to get the relevant content from the cache |
| 253 |
$relevant_content = wp_cache_get($content_cache_key, 'mxchat_system_prompts'); |
| 254 |
|
| 255 |
if ($relevant_content === false) { |
| 256 |
// Cache miss, query the database and cache the result |
| 257 |
$query = $wpdb->prepare("SELECT article_content FROM {$system_prompt_table} WHERE id = %d", $most_relevant_id); |
| 258 |
$relevant_content = $wpdb->get_var($query); |
| 259 |
|
| 260 |
if ($relevant_content === null) { |
| 261 |
error_log("No relevant content found for ID {$most_relevant_id}."); |
| 262 |
return null; // Return null if no content is found |
| 263 |
} |
| 264 |
|
| 265 |
wp_cache_set($content_cache_key, $relevant_content, 'mxchat_system_prompts', 3600); // Cache for 1 hour |
| 266 |
} |
| 267 |
|
| 268 |
return $relevant_content; |
| 269 |
} |
| 270 |
|
| 271 |
error_log("No relevant content found. Most relevant ID was null."); |
| 272 |
return null; // Return null if no relevant content is found |
| 273 |
} |
| 274 |
|
| 275 |
private function mxchat_generate_response($relevant_content, $api_key, $conversation_history) { |
| 276 |
if (!$relevant_content) { |
| 277 |
return "I'm sorry, I couldn't find relevant information on that topic."; |
| 278 |
} |
| 279 |
|
| 280 |
$system_prompt_instructions = isset($this->options['system_prompt_instructions']) ? $this->options['system_prompt_instructions'] : ''; |
| 281 |
|
| 282 |
$content_with_instructions = $system_prompt_instructions . " " . $relevant_content; |
| 283 |
|
| 284 |
array_unshift($conversation_history, [ |
| 285 |
'role' => 'system', |
| 286 |
'content' => "Here are your instructions: " . $content_with_instructions |
| 287 |
]); |
| 288 |
|
| 289 |
foreach ($conversation_history as &$message) { |
| 290 |
if ($message['role'] === 'bot') { |
| 291 |
$message['role'] = 'assistant'; |
| 292 |
} |
| 293 |
} |
| 294 |
|
| 295 |
$api_url = 'https://api.openai.com/v1/chat/completions'; |
| 296 |
|
| 297 |
$body = json_encode([ |
| 298 |
'model' => isset($this->options['model']) ? $this->options['model'] : 'gpt-3.5', |
| 299 |
'messages' => $conversation_history, |
| 300 |
]); |
| 301 |
|
| 302 |
$args = [ |
| 303 |
'body' => $body, |
| 304 |
'headers' => [ |
| 305 |
'Content-Type' => 'application/json', |
| 306 |
'Authorization' => 'Bearer ' . $api_key, |
| 307 |
], |
| 308 |
'timeout' => 60, |
| 309 |
'redirection' => 5, |
| 310 |
'blocking' => true, |
| 311 |
'httpversion' => '1.0', |
| 312 |
'sslverify' => true, |
| 313 |
]; |
| 314 |
|
| 315 |
$response = wp_remote_post($api_url, $args); |
| 316 |
|
| 317 |
if (is_wp_error($response)) { |
| 318 |
return "Sorry, there was an error processing your request."; |
| 319 |
} |
| 320 |
|
| 321 |
$response_body = json_decode(wp_remote_retrieve_body($response), true); |
| 322 |
|
| 323 |
if (isset($response_body['choices'][0]['message']['content'])) { |
| 324 |
if (isset($response_body['usage'])) { |
| 325 |
$prompt_tokens = $response_body['usage']['prompt_tokens']; |
| 326 |
$total_tokens = $response_body['usage']['total_tokens']; |
| 327 |
} |
| 328 |
return trim($response_body['choices'][0]['message']['content']); |
| 329 |
} else { |
| 330 |
return "Sorry, I couldn't process that request."; |
| 331 |
} |
| 332 |
} |
| 333 |
|
| 334 |
|
| 335 |
public function mxchat_dismiss_pre_chat_message() { |
| 336 |
// Get and sanitize the user identifier |
| 337 |
$user_id = $this->mxchat_get_user_identifier(); |
| 338 |
$user_id = sanitize_key($user_id); |
| 339 |
|
| 340 |
// Set a transient to track that the user has dismissed the pre-chat message |
| 341 |
$transient_key = 'mxchat_pre_chat_message_dismissed_' . $user_id; |
| 342 |
set_transient($transient_key, true, DAY_IN_SECONDS); |
| 343 |
|
| 344 |
wp_send_json_success(); |
| 345 |
} |
| 346 |
|
| 347 |
|
| 348 |
|
| 349 |
private function mxchat_calculate_cosine_similarity($vectorA, $vectorB) { |
| 350 |
if (!is_array($vectorA) || !is_array($vectorB) || empty($vectorA) || empty($vectorB)) { |
| 351 |
return 0; |
| 352 |
} |
| 353 |
|
| 354 |
$dotProduct = array_sum(array_map(function ($a, $b) { |
| 355 |
return $a * $b; |
| 356 |
}, $vectorA, $vectorB)); |
| 357 |
$normA = sqrt(array_sum(array_map(function ($a) { |
| 358 |
return $a * $a; |
| 359 |
}, $vectorA))); |
| 360 |
$normB = sqrt(array_sum(array_map(function ($b) { |
| 361 |
return $b * $b; |
| 362 |
}, $vectorB))); |
| 363 |
|
| 364 |
if ($normA == 0 || $normB == 0) { |
| 365 |
return 0; |
| 366 |
} |
| 367 |
|
| 368 |
return $dotProduct / ($normA * $normB); |
| 369 |
} |
| 370 |
|
| 371 |
public function mxchat_enqueue_scripts_styles() { |
| 372 |
// Define version numbers for the styles and scripts |
| 373 |
$chat_style_version = '1.0.5'; // Replace with your actual version |
| 374 |
$chat_script_version = '1.0.5'; // Replace with your actual version |
| 375 |
|
| 376 |
// Correct path to the script file |
| 377 |
wp_enqueue_script( |
| 378 |
'mxchat-chat-js', // Handle for the script |
| 379 |
plugin_dir_url(__FILE__) . '../js/chat-script.js', // Correct path using __FILE__ |
| 380 |
array('jquery'), // Dependencies |
| 381 |
$chat_script_version, // Version for cache busting |
| 382 |
true // Load script in footer |
| 383 |
); |
| 384 |
|
| 385 |
// Enqueue the CSS file similarly |
| 386 |
wp_enqueue_style( |
| 387 |
'mxchat-chat-css', // Handle for the style |
| 388 |
plugin_dir_url(__FILE__) . '../css/chat-style.css', // Correct path using __FILE__ |
| 389 |
array(), // No dependencies |
| 390 |
$chat_style_version // Version for cache busting |
| 391 |
); |
| 392 |
|
| 393 |
// Fetch options from the database |
| 394 |
$this->options = get_option('mxchat_options'); |
| 395 |
|
| 396 |
// Prepare settings to pass to JavaScript |
| 397 |
$style_settings = array( |
| 398 |
'ajax_url' => admin_url('admin-ajax.php'), |
| 399 |
'nonce' => wp_create_nonce('mxchat_chat_nonce'), // Nonce for security |
| 400 |
'rate_limit_message' => 'Rate limit exceeded. Please try again later.', |
| 401 |
'appendWidgetToBody' => $this->options['append_to_body'] ?? 'off' |
| 402 |
); |
| 403 |
|
| 404 |
// Localize the script with necessary data |
| 405 |
wp_localize_script('mxchat-chat-js', 'mxchatChat', $style_settings); |
| 406 |
} |
| 407 |
|
| 408 |
|
| 409 |
|
| 410 |
public function mxchat_reset_rate_limits() { |
| 411 |
global $wpdb; |
| 412 |
|
| 413 |
// Define a cache key pattern for rate limits |
| 414 |
$cache_key_pattern = 'mxchat_chat_limit_%'; |
| 415 |
|
| 416 |
// Retrieve all option names matching the pattern |
| 417 |
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching, WordPress.DB.DirectDatabaseQuery.DirectQuery |
| 418 |
$option_names = $wpdb->get_col("SELECT option_name FROM {$wpdb->options} WHERE option_name LIKE 'mxchat_chat_limit_%'"); |
| 419 |
|
| 420 |
// db call ok; no-cache ok |
| 421 |
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery -- db call ok |
| 422 |
$wpdb->query("DELETE FROM {$wpdb->options} WHERE option_name LIKE 'mxchat_chat_limit_%'"); |
| 423 |
|
| 424 |
// Clear the relevant cache entries |
| 425 |
foreach ($option_names as $option_name) { |
| 426 |
wp_cache_delete($option_name, 'options'); |
| 427 |
} |
| 428 |
|
| 429 |
// Optionally, clear a general cache if you have one |
| 430 |
wp_cache_delete('mxchat_all_chat_limits', 'options'); |
| 431 |
} |
| 432 |
} |
| 433 |
?> |
| 434 |
|
