| @@ -1,397 +1,378 @@ | ||
| 1 | -<?php | |
| 2 | -/** | |
| 3 | - * Word document handler and processor for MXChat | |
| 4 | - * Can be directly bundled in WordPress plugins | |
| 5 | - */ | |
| 6 | -class MXChat_Word_Handler { | |
| 7 | - private $temp_dir; | |
| 8 | - private $options; | |
| 9 | - | |
| 10 | - public function __construct($options) { | |
| 11 | - $this->options = $options; | |
| 12 | - $this->temp_dir = wp_upload_dir()['path']; | |
| 13 | - } | |
| 14 | - | |
| 15 | - /** | |
| 16 | - * Handle Word document upload and processing | |
| 17 | - */ | |
| 18 | - public function mxchat_handle_word_upload() { | |
| 19 | - // Match the PDF handler's nonce verification: the widget sends the chat-send | |
| 20 | - // nonce (action 'mxchat_chat_send'), which the old check_ajax_referer('mxchat_chat_nonce') | |
| 21 | - // rejected with -1. mxchat_verify_chat_send_nonce accepts both chat-send and chat nonces. | |
| 22 | - if (!isset($_POST['nonce']) || !MxChat_Integrator::mxchat_verify_chat_send_nonce(wp_unslash((string) $_POST['nonce']))) { | |
| 23 | - wp_send_json_error(array('message' => esc_html__('Invalid nonce.', 'mxchat')), 403); | |
| 24 | - } | |
| 25 | - | |
| 26 | - if (!isset($_FILES['word_file']) || !isset($_POST['session_id'])) { | |
| 27 | - wp_send_json_error(esc_html__('Missing required parameters.', 'mxchat')); | |
| 28 | - return; | |
| 29 | - } | |
| 30 | - | |
| 31 | - // SECURITY FIX: Check if Word uploads are enabled in settings | |
| 32 | - $options = get_option('mxchat_options', array()); | |
| 33 | - $show_word_button = isset($options['show_word_upload_button']) ? $options['show_word_upload_button'] : 'on'; | |
| 34 | - | |
| 35 | - if ($show_word_button !== 'on') { | |
| 36 | - wp_send_json_error(esc_html__('Word document uploads are currently disabled.', 'mxchat')); | |
| 37 | - return; | |
| 38 | - } | |
| 39 | - | |
| 40 | - $file = $_FILES['word_file']; | |
| 41 | - $session_id = MxChat_Utils::sanitize_session_id(wp_unslash($_POST['session_id'])); | |
| 42 | - $original_filename = sanitize_text_field($file['name']); | |
| 43 | - | |
| 44 | - // Update session owner if it changed (e.g. IP changed due to network switch) | |
| 45 | - $current_user_identifier = MxChat_User::mxchat_get_user_identifier(); | |
| 46 | - $session_owner = get_option("mxchat_session_owner_{$session_id}"); | |
| 47 | - | |
| 48 | - if (!$session_owner || $session_owner !== $current_user_identifier) { | |
| 49 | - update_option("mxchat_session_owner_{$session_id}", $current_user_identifier, 'no'); | |
| 50 | - } | |
| 51 | - | |
| 52 | - // Check file type | |
| 53 | - $allowed_types = array( | |
| 54 | - 'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' | |
| 55 | - ); | |
| 56 | - $file_type = wp_check_filetype($file['name'], $allowed_types); | |
| 57 | - | |
| 58 | - if (!$file_type['type']) { | |
| 59 | - wp_send_json_error(esc_html__('Invalid file type. Only .docx files are allowed.', 'mxchat')); | |
| 60 | - return; | |
| 61 | - } | |
| 62 | - | |
| 63 | - // SECURITY FIX: Generate random filename without exposing session_id | |
| 64 | - $random_string = wp_generate_password(20, false, false); // 20 char alphanumeric string | |
| 65 | - $word_filename = 'mxchat_word_' . $random_string . '_' . time() . '.docx'; | |
| 66 | - $word_path = $this->temp_dir . '/' . $word_filename; | |
| 67 | - | |
| 68 | - if (!move_uploaded_file($file['tmp_name'], $word_path)) { | |
| 69 | - wp_send_json_error(esc_html__('Failed to upload file.', 'mxchat')); | |
| 70 | - return; | |
| 71 | - } | |
| 72 | - | |
| 73 | - $this->mxchat_clear_word_transients($session_id); | |
| 74 | - | |
| 75 | - // Process the document | |
| 76 | - $embeddings = $this->mxchat_process_word_document($word_path); | |
| 77 | - | |
| 78 | - if ($embeddings === false || empty($embeddings)) { | |
| 79 | - unlink($word_path); | |
| 80 | - $error_message = $this->options['word_intent_error_text'] ?? | |
| 81 | - esc_html__('The uploaded document appears to be empty or contains unsupported content.', 'mxchat'); | |
| 82 | - wp_send_json_error($error_message); | |
| 83 | - return; | |
| 84 | - } | |
| 85 | - | |
| 86 | - // Store the mapping between session and the random filename | |
| 87 | - set_transient('mxchat_word_url_' . $session_id, $word_path, HOUR_IN_SECONDS); | |
| 88 | - set_transient('mxchat_word_filename_' . $session_id, $original_filename, HOUR_IN_SECONDS); | |
| 89 | - set_transient('mxchat_word_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS); | |
| 90 | - set_transient('mxchat_include_word_in_context_' . $session_id, true, HOUR_IN_SECONDS); | |
| 91 | - | |
| 92 | - $success_message = $this->options['pdf_intent_success_text'] ?? | |
| 93 | - __("I've processed the document. What questions do you have about it?", 'mxchat'); | |
| 94 | - | |
| 95 | - wp_send_json_success([ | |
| 96 | - 'message' => $success_message, | |
| 97 | - 'filename' => $original_filename | |
| 98 | - ]); | |
| 99 | - } | |
| 100 | - | |
| 101 | - /** | |
| 102 | - * Process Word document and generate embeddings | |
| 103 | - */ | |
| 104 | -private function mxchat_process_word_document($file_path) { | |
| 105 | - // Get the maximum number of pages allowed from admin settings | |
| 106 | - $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69; // Use same setting as PDF | |
| 107 | - | |
| 108 | - try { | |
| 109 | - $zip = new ZipArchive(); | |
| 110 | - if ($zip->open($file_path) !== true) { | |
| 111 | - return false; | |
| 112 | - } | |
| 113 | - | |
| 114 | - // Extract main document content | |
| 115 | - $content = $zip->getFromName('word/document.xml'); | |
| 116 | - $zip->close(); | |
| 117 | - | |
| 118 | - if ($content === false) { | |
| 119 | - return false; | |
| 120 | - } | |
| 121 | - | |
| 122 | - // Clean up the content | |
| 123 | - $text = $this->mxchat_clean_word_content($content); | |
| 124 | - | |
| 125 | - // Count pages (roughly estimate based on paragraphs) | |
| 126 | - $paragraphs = explode("\n\n", $text); | |
| 127 | - $estimated_pages = ceil(count($paragraphs) / 3); // Assume ~3 paragraphs per page | |
| 128 | - | |
| 129 | - if ($estimated_pages > $max_pages) { | |
| 130 | - return esc_html__('too_many_pages', 'mxchat'); | |
| 131 | - } | |
| 132 | - | |
| 133 | - // Split into chunks and continue processing... | |
| 134 | - $chunks = $this->mxchat_split_word_into_chunks($text, 1000); | |
| 135 | - | |
| 136 | - $embeddings = []; | |
| 137 | - foreach ($chunks as $chunk_number => $chunk) { | |
| 138 | - if (empty(trim($chunk))) { | |
| 139 | - continue; | |
| 140 | - } | |
| 141 | - | |
| 142 | - $embedding = $this->mxchat_generate_embedding_word( | |
| 143 | - esc_html__('Chunk ', 'mxchat') . ($chunk_number + 1) . ': ' . $chunk, | |
| 144 | - $this->options['api_key'] | |
| 145 | - ); | |
| 146 | - | |
| 147 | - if ($embedding) { | |
| 148 | - $embeddings[] = [ | |
| 149 | - 'chunk_number' => $chunk_number + 1, | |
| 150 | - 'embedding' => $embedding, | |
| 151 | - 'text' => $chunk, | |
| 152 | - ]; | |
| 153 | - } | |
| 154 | - } | |
| 155 | - | |
| 156 | - return $embeddings; | |
| 157 | - | |
| 158 | - } catch (Exception $e) { | |
| 159 | - return false; | |
| 160 | - } | |
| 161 | -} | |
| 162 | - /** | |
| 163 | - * Clean Word XML content | |
| 164 | - */ | |
| 165 | - private function mxchat_clean_word_content($content) { | |
| 166 | - // Remove XML namespaces | |
| 167 | - $content = preg_replace('/xmlns[^=]*="[^"]*"/i', '', $content); | |
| 168 | - | |
| 169 | - // Convert Word XML elements to text | |
| 170 | - $content = str_replace('</w:p>', "\n", $content); | |
| 171 | - $content = str_replace('</w:tr>', "\n", $content); | |
| 172 | - | |
| 173 | - // Strip remaining XML tags | |
| 174 | - $content = strip_tags($content); | |
| 175 | - | |
| 176 | - // Clean up whitespace | |
| 177 | - $content = preg_replace('/\s+/', ' ', $content); | |
| 178 | - $content = preg_replace('/\n\s*\n/', "\n\n", $content); | |
| 179 | - | |
| 180 | - return trim($content); | |
| 181 | - } | |
| 182 | - | |
| 183 | - /** | |
| 184 | - * Split text into manageable chunks | |
| 185 | - */ | |
| 186 | - private function mxchat_split_word_into_chunks($text, $chunk_size) { | |
| 187 | - $chunks = []; | |
| 188 | - $paragraphs = explode("\n\n", $text); | |
| 189 | - | |
| 190 | - $current_chunk = ''; | |
| 191 | - foreach ($paragraphs as $paragraph) { | |
| 192 | - if (strlen($current_chunk) + strlen($paragraph) > $chunk_size) { | |
| 193 | - if (!empty($current_chunk)) { | |
| 194 | - $chunks[] = trim($current_chunk); | |
| 195 | - } | |
| 196 | - $current_chunk = $paragraph; | |
| 197 | - } else { | |
| 198 | - $current_chunk .= (!empty($current_chunk) ? "\n\n" : '') . $paragraph; | |
| 199 | - } | |
| 200 | - } | |
| 201 | - | |
| 202 | - if (!empty($current_chunk)) { | |
| 203 | - $chunks[] = trim($current_chunk); | |
| 204 | - } | |
| 205 | - | |
| 206 | - return $chunks; | |
| 207 | - } | |
| 208 | - | |
| 209 | - /** | |
| 210 | - * Remove Word document and clean up transients | |
| 211 | - */ | |
| 212 | -public function mxchat_handle_word_remove() { | |
| 213 | - check_ajax_referer('mxchat_chat_nonce', 'nonce'); | |
| 214 | - | |
| 215 | - if (empty($_POST['session_id'])) { | |
| 216 | - wp_send_json_error(esc_html__('Session ID missing.', 'mxchat')); | |
| 217 | - return; | |
| 218 | - } | |
| 219 | - | |
| 220 | - $session_id = MxChat_Utils::sanitize_session_id(wp_unslash($_POST['session_id'])); | |
| 221 | - if ($session_id === '') { | |
| 222 | - wp_send_json_error(esc_html__('Session ID missing.', 'mxchat')); | |
| 223 | - return; | |
| 224 | - } | |
| 225 | - | |
| 226 | - // Session-ownership bookkeeping — same rule as handle_pdf_remove() and the | |
| 227 | - // history endpoint (plan-mxchat-20260731-d42bec). Possession of the session | |
| 228 | - // id is the credential, so this records/refreshes the owner rather than | |
| 229 | - // refusing a mismatch; see the fuller note in handle_pdf_remove(). | |
| 230 | - $current_user_identifier = MxChat_User::mxchat_get_user_identifier(); | |
| 231 | - $session_owner = get_option("mxchat_session_owner_{$session_id}"); | |
| 232 | - if (!$session_owner || $session_owner !== $current_user_identifier) { | |
| 233 | - update_option("mxchat_session_owner_{$session_id}", $current_user_identifier, 'no'); | |
| 234 | - } | |
| 235 | - | |
| 236 | - $word_path = get_transient('mxchat_word_url_' . $session_id); | |
| 237 | - | |
| 238 | - if ($word_path && file_exists($word_path)) { | |
| 239 | - unlink($word_path); | |
| 240 | - } | |
| 241 | - | |
| 242 | - $this->mxchat_clear_word_transients($session_id); | |
| 243 | - | |
| 244 | - wp_send_json_success([ | |
| 245 | - 'message' => esc_html__('Document removed successfully.', 'mxchat') | |
| 246 | - ]); | |
| 247 | - } | |
| 248 | - | |
| 249 | - /** | |
| 250 | - * Clear all Word-related transients | |
| 251 | - */ | |
| 252 | - private function mxchat_clear_word_transients($session_id) { | |
| 253 | - delete_transient('mxchat_word_url_' . $session_id); | |
| 254 | - delete_transient('mxchat_word_filename_' . $session_id); | |
| 255 | - delete_transient('mxchat_word_embeddings_' . $session_id); | |
| 256 | - delete_transient('mxchat_include_word_in_context_' . $session_id); | |
| 257 | - } | |
| 258 | - | |
| 259 | - /** | |
| 260 | - * Find relevant chunks from the Word document | |
| 261 | - */ | |
| 262 | - public function mxchat_find_relevant_word_chunks($query_embedding, $embeddings) { | |
| 263 | - $most_relevant = null; | |
| 264 | - $highest_similarity = -INF; | |
| 265 | - | |
| 266 | - foreach ($embeddings as $chunk_data) { | |
| 267 | - $similarity = $this->mxchat_calculate_cosine_similarity_word($query_embedding, $chunk_data['embedding']); | |
| 268 | - | |
| 269 | - if ($similarity > $highest_similarity) { | |
| 270 | - $highest_similarity = $similarity; | |
| 271 | - $most_relevant = $chunk_data['chunk_number']; | |
| 272 | - } | |
| 273 | - } | |
| 274 | - | |
| 275 | - if (!is_null($most_relevant)) { | |
| 276 | - $chunk_numbers = range( | |
| 277 | - max(1, $most_relevant - 1), | |
| 278 | - min(count($embeddings), $most_relevant + 1) | |
| 279 | - ); | |
| 280 | - return array_filter($embeddings, function ($chunk) use ($chunk_numbers) { | |
| 281 | - return in_array($chunk['chunk_number'], $chunk_numbers); | |
| 282 | - }); | |
| 283 | - } | |
| 284 | - | |
| 285 | - return []; | |
| 286 | - } | |
| 287 | - | |
| 288 | - /** | |
| 289 | - * Handle Word document discussion similar to PDF discussion | |
| 290 | - */ | |
| 291 | -public function mxchat_handle_word_discussion($message, $user_id, $session_id) { | |
| 292 | - // Get stored embeddings for the session | |
| 293 | - $embeddings = get_transient('mxchat_word_embeddings_' . $session_id); | |
| 294 | - $word_path = get_transient('mxchat_word_url_' . $session_id); | |
| 295 | - | |
| 296 | - if (!$embeddings || !$word_path) { | |
| 297 | - $trigger_text = $this->options['word_intent_trigger_text'] ?? | |
| 298 | - __("Please upload a Word document (.docx) that you'd like to discuss.", 'mxchat'); | |
| 299 | - set_transient('mxchat_waiting_for_word_' . $session_id, true, HOUR_IN_SECONDS); | |
| 300 | - $this->fallbackResponse['text'] = $trigger_text; | |
| 301 | - return; | |
| 302 | - } | |
| 303 | - | |
| 304 | - // Set context flag for including Word content in conversation | |
| 305 | - set_transient('mxchat_include_word_in_context_' . $session_id, true, HOUR_IN_SECONDS); | |
| 306 | - $this->fallbackResponse['text'] = ''; // Proceed without additional message | |
| 307 | - } | |
| 308 | - | |
| 309 | - | |
| 310 | - private function mxchat_generate_embedding_word($text, $api_key) { | |
| 311 | - $endpoint = 'https://api.openai.com/v1/embeddings'; | |
| 312 | - | |
| 313 | - $body = wp_json_encode([ | |
| 314 | - 'input' => $text, | |
| 315 | - 'model' => 'text-embedding-ada-002' | |
| 316 | - ]); | |
| 317 | - | |
| 318 | - $args = [ | |
| 319 | - 'body' => $body, | |
| 320 | - 'headers' => [ | |
| 321 | - 'Content-Type' => 'application/json', | |
| 322 | - 'Authorization' => 'Bearer ' . $api_key, | |
| 323 | - ], | |
| 324 | - 'timeout' => 60, | |
| 325 | - 'redirection' => 5, | |
| 326 | - 'blocking' => true, | |
| 327 | - 'httpversion' => '1.0', | |
| 328 | - 'sslverify' => true, | |
| 329 | - ]; | |
| 330 | - | |
| 331 | - $response = wp_remote_post($endpoint, $args); | |
| 332 | - | |
| 333 | - if (is_wp_error($response)) { | |
| 334 | - return null; | |
| 335 | - } | |
| 336 | - | |
| 337 | - $response_body = json_decode(wp_remote_retrieve_body($response), true); | |
| 338 | - | |
| 339 | - if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) { | |
| 340 | - return $response_body['data'][0]['embedding']; | |
| 341 | - } else { | |
| 342 | - return null; | |
| 343 | - } | |
| 344 | - } | |
| 345 | - | |
| 346 | - | |
| 347 | - private function mxchat_calculate_cosine_similarity_word($vectorA, $vectorB) { | |
| 348 | - if (!is_array($vectorA) || !is_array($vectorB) || empty($vectorA) || empty($vectorB)) { | |
| 349 | - return 0; | |
| 350 | - } | |
| 351 | - | |
| 352 | - $dotProduct = array_sum(array_map(function ($a, $b) { | |
| 353 | - return $a * $b; | |
| 354 | - }, $vectorA, $vectorB)); | |
| 355 | - $normA = sqrt(array_sum(array_map(function ($a) { | |
| 356 | - return $a * $a; | |
| 357 | - }, $vectorA))); | |
| 358 | - $normB = sqrt(array_sum(array_map(function ($b) { | |
| 359 | - return $b * $b; | |
| 360 | - }, $vectorB))); | |
| 361 | - | |
| 362 | - if ($normA == 0 || $normB == 0) { | |
| 363 | - return 0; | |
| 364 | - } | |
| 365 | - | |
| 366 | - return $dotProduct / ($normA * $normB); | |
| 367 | - } | |
| 368 | - | |
| 369 | - /** | |
| 370 | - * Check the status of a Word document for the current session | |
| 371 | - */ | |
| 372 | -public function mxchat_check_word_status() { | |
| 373 | - check_ajax_referer('mxchat_chat_nonce', 'nonce'); | |
| 374 | - | |
| 375 | - if (empty($_POST['session_id'])) { | |
| 376 | - wp_send_json_error(esc_html__('Session ID missing.', 'mxchat')); | |
| 377 | - return; | |
| 378 | - } | |
| 379 | - | |
| 380 | - $session_id = MxChat_Utils::sanitize_session_id(wp_unslash($_POST['session_id'])); | |
| 381 | - $word_path = get_transient('mxchat_word_url_' . $session_id); | |
| 382 | - $filename = get_transient('mxchat_word_filename_' . $session_id); | |
| 383 | - | |
| 384 | - if ($word_path && file_exists($word_path) && $filename) { | |
| 385 | - wp_send_json_success([ | |
| 386 | - 'has_word' => true, | |
| 387 | - 'filename' => $filename | |
| 388 | - ]); | |
| 389 | - } else { | |
| 390 | - wp_send_json_success([ | |
| 391 | - 'has_word' => false | |
| 392 | - ]); | |
| 393 | - } | |
| 394 | -} | |
| 395 | - | |
| 396 | - | |
| 1 | +<?php | |
| 2 | +/** | |
| 3 | + * Word document handler and processor for MXChat | |
| 4 | + * Can be directly bundled in WordPress plugins | |
| 5 | + */ | |
| 6 | +class MXChat_Word_Handler { | |
| 7 | + private $temp_dir; | |
| 8 | + private $options; | |
| 9 | + | |
| 10 | + public function __construct($options) { | |
| 11 | + $this->options = $options; | |
| 12 | + $this->temp_dir = wp_upload_dir()['path']; | |
| 13 | + } | |
| 14 | + | |
| 15 | + /** | |
| 16 | + * Handle Word document upload and processing | |
| 17 | + */ | |
| 18 | + public function mxchat_handle_word_upload() { | |
| 19 | + check_ajax_referer('mxchat_chat_nonce', 'nonce'); | |
| 20 | + | |
| 21 | + if (!isset($_FILES['word_file']) || !isset($_POST['session_id'])) { | |
| 22 | + wp_send_json_error(esc_html__('Missing required parameters.', 'mxchat')); | |
| 23 | + return; | |
| 24 | + } | |
| 25 | + | |
| 26 | + // SECURITY FIX: Check if Word uploads are enabled in settings | |
| 27 | + $options = get_option('mxchat_options', array()); | |
| 28 | + $show_word_button = isset($options['show_word_upload_button']) ? $options['show_word_upload_button'] : 'on'; | |
| 29 | + | |
| 30 | + if ($show_word_button !== 'on') { | |
| 31 | + wp_send_json_error(esc_html__('Word document uploads are currently disabled.', 'mxchat')); | |
| 32 | + return; | |
| 33 | + } | |
| 34 | + | |
| 35 | + $file = $_FILES['word_file']; | |
| 36 | + $session_id = sanitize_text_field($_POST['session_id']); | |
| 37 | + $original_filename = sanitize_text_field($file['name']); | |
| 38 | + | |
| 39 | + // SECURITY FIX: Verify session ownership before allowing upload | |
| 40 | + $current_user_identifier = MxChat_User::mxchat_get_user_identifier(); | |
| 41 | + $session_owner = get_option("mxchat_session_owner_{$session_id}"); | |
| 42 | + | |
| 43 | + if ($session_owner && $session_owner !== $current_user_identifier) { | |
| 44 | + wp_send_json_error(esc_html__('Unauthorized access.', 'mxchat')); | |
| 45 | + return; | |
| 46 | + } | |
| 47 | + | |
| 48 | + // Check file type | |
| 49 | + $allowed_types = array( | |
| 50 | + 'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' | |
| 51 | + ); | |
| 52 | + $file_type = wp_check_filetype($file['name'], $allowed_types); | |
| 53 | + | |
| 54 | + if (!$file_type['type']) { | |
| 55 | + wp_send_json_error(esc_html__('Invalid file type. Only .docx files are allowed.', 'mxchat')); | |
| 56 | + return; | |
| 57 | + } | |
| 58 | + | |
| 59 | + // SECURITY FIX: Generate random filename without exposing session_id | |
| 60 | + $random_string = wp_generate_password(20, false, false); // 20 char alphanumeric string | |
| 61 | + $word_filename = 'mxchat_word_' . $random_string . '_' . time() . '.docx'; | |
| 62 | + $word_path = $this->temp_dir . '/' . $word_filename; | |
| 63 | + | |
| 64 | + if (!move_uploaded_file($file['tmp_name'], $word_path)) { | |
| 65 | + wp_send_json_error(esc_html__('Failed to upload file.', 'mxchat')); | |
| 66 | + return; | |
| 67 | + } | |
| 68 | + | |
| 69 | + $this->mxchat_clear_word_transients($session_id); | |
| 70 | + | |
| 71 | + // Process the document | |
| 72 | + $embeddings = $this->mxchat_process_word_document($word_path); | |
| 73 | + | |
| 74 | + if ($embeddings === false || empty($embeddings)) { | |
| 75 | + unlink($word_path); | |
| 76 | + $error_message = $this->options['word_intent_error_text'] ?? | |
| 77 | + esc_html__('The uploaded document appears to be empty or contains unsupported content.', 'mxchat'); | |
| 78 | + wp_send_json_error($error_message); | |
| 79 | + return; | |
| 80 | + } | |
| 81 | + | |
| 82 | + // Store the mapping between session and the random filename | |
| 83 | + set_transient('mxchat_word_url_' . $session_id, $word_path, HOUR_IN_SECONDS); | |
| 84 | + set_transient('mxchat_word_filename_' . $session_id, $original_filename, HOUR_IN_SECONDS); | |
| 85 | + set_transient('mxchat_word_embeddings_' . $session_id, $embeddings, HOUR_IN_SECONDS); | |
| 86 | + set_transient('mxchat_include_word_in_context_' . $session_id, true, HOUR_IN_SECONDS); | |
| 87 | + | |
| 88 | + $success_message = $this->options['pdf_intent_success_text'] ?? | |
| 89 | + __("I've processed the document. What questions do you have about it?", 'mxchat'); | |
| 90 | + | |
| 91 | + wp_send_json_success([ | |
| 92 | + 'message' => $success_message, | |
| 93 | + 'filename' => $original_filename | |
| 94 | + ]); | |
| 95 | + } | |
| 96 | + | |
| 97 | + /** | |
| 98 | + * Process Word document and generate embeddings | |
| 99 | + */ | |
| 100 | +private function mxchat_process_word_document($file_path) { | |
| 101 | + // Get the maximum number of pages allowed from admin settings | |
| 102 | + $max_pages = isset($this->options['pdf_max_pages']) ? intval($this->options['pdf_max_pages']) : 69; // Use same setting as PDF | |
| 103 | + | |
| 104 | + try { | |
| 105 | + $zip = new ZipArchive(); | |
| 106 | + if ($zip->open($file_path) !== true) { | |
| 107 | + return false; | |
| 108 | + } | |
| 109 | + | |
| 110 | + // Extract main document content | |
| 111 | + $content = $zip->getFromName('word/document.xml'); | |
| 112 | + $zip->close(); | |
| 113 | + | |
| 114 | + if ($content === false) { | |
| 115 | + return false; | |
| 116 | + } | |
| 117 | + | |
| 118 | + // Clean up the content | |
| 119 | + $text = $this->mxchat_clean_word_content($content); | |
| 120 | + | |
| 121 | + // Count pages (roughly estimate based on paragraphs) | |
| 122 | + $paragraphs = explode("\n\n", $text); | |
| 123 | + $estimated_pages = ceil(count($paragraphs) / 3); // Assume ~3 paragraphs per page | |
| 124 | + | |
| 125 | + if ($estimated_pages > $max_pages) { | |
| 126 | + return esc_html__('too_many_pages', 'mxchat'); | |
| 127 | + } | |
| 128 | + | |
| 129 | + // Split into chunks and continue processing... | |
| 130 | + $chunks = $this->mxchat_split_word_into_chunks($text, 1000); | |
| 131 | + | |
| 132 | + $embeddings = []; | |
| 133 | + foreach ($chunks as $chunk_number => $chunk) { | |
| 134 | + if (empty(trim($chunk))) { | |
| 135 | + continue; | |
| 136 | + } | |
| 137 | + | |
| 138 | + $embedding = $this->mxchat_generate_embedding_word( | |
| 139 | + esc_html__('Chunk ', 'mxchat') . ($chunk_number + 1) . ': ' . $chunk, | |
| 140 | + $this->options['api_key'] | |
| 141 | + ); | |
| 142 | + | |
| 143 | + if ($embedding) { | |
| 144 | + $embeddings[] = [ | |
| 145 | + 'chunk_number' => $chunk_number + 1, | |
| 146 | + 'embedding' => $embedding, | |
| 147 | + 'text' => $chunk, | |
| 148 | + ]; | |
| 149 | + } | |
| 150 | + } | |
| 151 | + | |
| 152 | + return $embeddings; | |
| 153 | + | |
| 154 | + } catch (Exception $e) { | |
| 155 | + return false; | |
| 156 | + } | |
| 157 | +} | |
| 158 | + /** | |
| 159 | + * Clean Word XML content | |
| 160 | + */ | |
| 161 | + private function mxchat_clean_word_content($content) { | |
| 162 | + // Remove XML namespaces | |
| 163 | + $content = preg_replace('/xmlns[^=]*="[^"]*"/i', '', $content); | |
| 164 | + | |
| 165 | + // Convert Word XML elements to text | |
| 166 | + $content = str_replace('</w:p>', "\n", $content); | |
| 167 | + $content = str_replace('</w:tr>', "\n", $content); | |
| 168 | + | |
| 169 | + // Strip remaining XML tags | |
| 170 | + $content = strip_tags($content); | |
| 171 | + | |
| 172 | + // Clean up whitespace | |
| 173 | + $content = preg_replace('/\s+/', ' ', $content); | |
| 174 | + $content = preg_replace('/\n\s*\n/', "\n\n", $content); | |
| 175 | + | |
| 176 | + return trim($content); | |
| 177 | + } | |
| 178 | + | |
| 179 | + /** | |
| 180 | + * Split text into manageable chunks | |
| 181 | + */ | |
| 182 | + private function mxchat_split_word_into_chunks($text, $chunk_size) { | |
| 183 | + $chunks = []; | |
| 184 | + $paragraphs = explode("\n\n", $text); | |
| 185 | + | |
| 186 | + $current_chunk = ''; | |
| 187 | + foreach ($paragraphs as $paragraph) { | |
| 188 | + if (strlen($current_chunk) + strlen($paragraph) > $chunk_size) { | |
| 189 | + if (!empty($current_chunk)) { | |
| 190 | + $chunks[] = trim($current_chunk); | |
| 191 | + } | |
| 192 | + $current_chunk = $paragraph; | |
| 193 | + } else { | |
| 194 | + $current_chunk .= (!empty($current_chunk) ? "\n\n" : '') . $paragraph; | |
| 195 | + } | |
| 196 | + } | |
| 197 | + | |
| 198 | + if (!empty($current_chunk)) { | |
| 199 | + $chunks[] = trim($current_chunk); | |
| 200 | + } | |
| 201 | + | |
| 202 | + return $chunks; | |
| 203 | + } | |
| 204 | + | |
| 205 | + /** | |
| 206 | + * Remove Word document and clean up transients | |
| 207 | + */ | |
| 208 | +public function mxchat_handle_word_remove() { | |
| 209 | + check_ajax_referer('mxchat_chat_nonce', 'nonce'); | |
| 210 | + | |
| 211 | + if (empty($_POST['session_id'])) { | |
| 212 | + wp_send_json_error(esc_html__('Session ID missing.', 'mxchat')); | |
| 213 | + return; | |
| 214 | + } | |
| 215 | + | |
| 216 | + $session_id = sanitize_text_field($_POST['session_id']); | |
| 217 | + $word_path = get_transient('mxchat_word_url_' . $session_id); | |
| 218 | + | |
| 219 | + if ($word_path && file_exists($word_path)) { | |
| 220 | + unlink($word_path); | |
| 221 | + } | |
| 222 | + | |
| 223 | + $this->mxchat_clear_word_transients($session_id); | |
| 224 | + | |
| 225 | + wp_send_json_success([ | |
| 226 | + 'message' => esc_html__('Document removed successfully.', 'mxchat') | |
| 227 | + ]); | |
| 228 | + } | |
| 229 | + | |
| 230 | + /** | |
| 231 | + * Clear all Word-related transients | |
| 232 | + */ | |
| 233 | + private function mxchat_clear_word_transients($session_id) { | |
| 234 | + delete_transient('mxchat_word_url_' . $session_id); | |
| 235 | + delete_transient('mxchat_word_filename_' . $session_id); | |
| 236 | + delete_transient('mxchat_word_embeddings_' . $session_id); | |
| 237 | + delete_transient('mxchat_include_word_in_context_' . $session_id); | |
| 238 | + } | |
| 239 | + | |
| 240 | + /** | |
| 241 | + * Find relevant chunks from the Word document | |
| 242 | + */ | |
| 243 | + public function mxchat_find_relevant_word_chunks($query_embedding, $embeddings) { | |
| 244 | + $most_relevant = null; | |
| 245 | + $highest_similarity = -INF; | |
| 246 | + | |
| 247 | + foreach ($embeddings as $chunk_data) { | |
| 248 | + $similarity = $this->mxchat_calculate_cosine_similarity_word($query_embedding, $chunk_data['embedding']); | |
| 249 | + | |
| 250 | + if ($similarity > $highest_similarity) { | |
| 251 | + $highest_similarity = $similarity; | |
| 252 | + $most_relevant = $chunk_data['chunk_number']; | |
| 253 | + } | |
| 254 | + } | |
| 255 | + | |
| 256 | + if (!is_null($most_relevant)) { | |
| 257 | + $chunk_numbers = range( | |
| 258 | + max(1, $most_relevant - 1), | |
| 259 | + min(count($embeddings), $most_relevant + 1) | |
| 260 | + ); | |
| 261 | + return array_filter($embeddings, function ($chunk) use ($chunk_numbers) { | |
| 262 | + return in_array($chunk['chunk_number'], $chunk_numbers); | |
| 263 | + }); | |
| 264 | + } | |
| 265 | + | |
| 266 | + return []; | |
| 267 | + } | |
| 268 | + | |
| 269 | + /** | |
| 270 | + * Handle Word document discussion similar to PDF discussion | |
| 271 | + */ | |
| 272 | +public function mxchat_handle_word_discussion($message, $user_id, $session_id) { | |
| 273 | + // Get stored embeddings for the session | |
| 274 | + $embeddings = get_transient('mxchat_word_embeddings_' . $session_id); | |
| 275 | + $word_path = get_transient('mxchat_word_url_' . $session_id); | |
| 276 | + | |
| 277 | + if (!$embeddings || !$word_path) { | |
| 278 | + $trigger_text = $this->options['word_intent_trigger_text'] ?? | |
| 279 | + __("Please upload a Word document (.docx) that you'd like to discuss.", 'mxchat'); | |
| 280 | + set_transient('mxchat_waiting_for_word_' . $session_id, true, HOUR_IN_SECONDS); | |
| 281 | + $this->fallbackResponse['text'] = $trigger_text; | |
| 282 | + return; | |
| 283 | + } | |
| 284 | + | |
| 285 | + // Set context flag for including Word content in conversation | |
| 286 | + set_transient('mxchat_include_word_in_context_' . $session_id, true, HOUR_IN_SECONDS); | |
| 287 | + $this->fallbackResponse['text'] = ''; // Proceed without additional message | |
| 288 | + } | |
| 289 | + | |
| 290 | + | |
| 291 | + private function mxchat_generate_embedding_word($text, $api_key) { | |
| 292 | + $endpoint = 'https://api.openai.com/v1/embeddings'; | |
| 293 | + | |
| 294 | + $body = wp_json_encode([ | |
| 295 | + 'input' => $text, | |
| 296 | + 'model' => 'text-embedding-ada-002' | |
| 297 | + ]); | |
| 298 | + | |
| 299 | + $args = [ | |
| 300 | + 'body' => $body, | |
| 301 | + 'headers' => [ | |
| 302 | + 'Content-Type' => 'application/json', | |
| 303 | + 'Authorization' => 'Bearer ' . $api_key, | |
| 304 | + ], | |
| 305 | + 'timeout' => 60, | |
| 306 | + 'redirection' => 5, | |
| 307 | + 'blocking' => true, | |
| 308 | + 'httpversion' => '1.0', | |
| 309 | + 'sslverify' => true, | |
| 310 | + ]; | |
| 311 | + | |
| 312 | + $response = wp_remote_post($endpoint, $args); | |
| 313 | + | |
| 314 | + if (is_wp_error($response)) { | |
| 315 | + return null; | |
| 316 | + } | |
| 317 | + | |
| 318 | + $response_body = json_decode(wp_remote_retrieve_body($response), true); | |
| 319 | + | |
| 320 | + if (isset($response_body['data'][0]['embedding']) && is_array($response_body['data'][0]['embedding'])) { | |
| 321 | + return $response_body['data'][0]['embedding']; | |
| 322 | + } else { | |
| 323 | + return null; | |
| 324 | + } | |
| 325 | + } | |
| 326 | + | |
| 327 | + | |
| 328 | + private function mxchat_calculate_cosine_similarity_word($vectorA, $vectorB) { | |
| 329 | + if (!is_array($vectorA) || !is_array($vectorB) || empty($vectorA) || empty($vectorB)) { | |
| 330 | + return 0; | |
| 331 | + } | |
| 332 | + | |
| 333 | + $dotProduct = array_sum(array_map(function ($a, $b) { | |
| 334 | + return $a * $b; | |
| 335 | + }, $vectorA, $vectorB)); | |
| 336 | + $normA = sqrt(array_sum(array_map(function ($a) { | |
| 337 | + return $a * $a; | |
| 338 | + }, $vectorA))); | |
| 339 | + $normB = sqrt(array_sum(array_map(function ($b) { | |
| 340 | + return $b * $b; | |
| 341 | + }, $vectorB))); | |
| 342 | + | |
| 343 | + if ($normA == 0 || $normB == 0) { | |
| 344 | + return 0; | |
| 345 | + } | |
| 346 | + | |
| 347 | + return $dotProduct / ($normA * $normB); | |
| 348 | + } | |
| 349 | + | |
| 350 | + /** | |
| 351 | + * Check the status of a Word document for the current session | |
| 352 | + */ | |
| 353 | +public function mxchat_check_word_status() { | |
| 354 | + check_ajax_referer('mxchat_chat_nonce', 'nonce'); | |
| 355 | + | |
| 356 | + if (empty($_POST['session_id'])) { | |
| 357 | + wp_send_json_error(esc_html__('Session ID missing.', 'mxchat')); | |
| 358 | + return; | |
| 359 | + } | |
| 360 | + | |
| 361 | + $session_id = sanitize_text_field($_POST['session_id']); | |
| 362 | + $word_path = get_transient('mxchat_word_url_' . $session_id); | |
| 363 | + $filename = get_transient('mxchat_word_filename_' . $session_id); | |
| 364 | + | |
| 365 | + if ($word_path && file_exists($word_path) && $filename) { | |
| 366 | + wp_send_json_success([ | |
| 367 | + 'has_word' => true, | |
| 368 | + 'filename' => $filename | |
| 369 | + ]); | |
| 370 | + } else { | |
| 371 | + wp_send_json_success([ | |
| 372 | + 'has_word' => false | |
| 373 | + ]); | |
| 374 | + } | |
| 375 | +} | |
| 376 | + | |
| 377 | + | |
| 397 | 378 | } |
