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MxChat – AI Chatbot & Content Generation for WordPress / 3.0.4
MxChat – AI Chatbot & Content Generation for WordPress v3.0.4
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← All changes | mxchat-basic.php +1069 -1722 3.2.103.0.4 View file →
@@ -1,1722 +1,1069 @@
1 -<?php
2 -/**
3 - * Plugin Name: MxChat
4 - * Plugin URI: https://mxchat.ai/
5 - * Description: AI chatbot for WordPress with OpenAI, Claude, xAI, DeepSeek, live agent, PDF uploads, WooCommerce, and training on website data.
6 - * Version: 3.2.10
7 - * Author: MxChat
8 - * Author URI: https://mxchat.ai
9 - * License: GPLv2 or later
10 - * License URI: https://www.gnu.org/licenses/gpl-2.0.html
11 - * Text Domain: mxchat
12 - * Domain Path: /languages
13 - */
14 -
15 -if (!defined('ABSPATH')) {
16 - exit; // Exit if accessed directly.
17 -}
18 -
19 -
20 -if (!defined('MXCHAT_DEV_MODE')) {
21 - define('MXCHAT_DEV_MODE', false);
22 -}
23 -
24 -if (!defined('MXCHAT_VERSION')) {
25 - $plugin_data = get_file_data(__FILE__, array('Version' => 'Version'), 'plugin');
26 - $version = $plugin_data['Version'];
27 - if (MXCHAT_DEV_MODE) {
28 - $version .= '.' . time();
29 - }
30 - define('MXCHAT_VERSION', $version);
31 -}
32 -
33 -function mxchat_load_textdomain() {
34 - $domain = 'mxchat';
35 - $locale = determine_locale();
36 -
37 - // First, try to load from /wp-content/languages/plugins/ (preserved during updates)
38 - $mo_file = WP_LANG_DIR . '/plugins/' . $domain . '-' . $locale . '.mo';
39 - if (file_exists($mo_file)) {
40 - load_textdomain($domain, $mo_file);
41 - return;
42 - }
43 -
44 - // Fallback to plugin's /languages directory
45 - load_plugin_textdomain($domain, false, dirname(plugin_basename(__FILE__)) . '/languages');
46 -}
47 -add_action('init', 'mxchat_load_textdomain');
48 -
49 -/**
50 - * One-time migration: gemini-3-pro-preview was shut down by Google on March 9, 2026.
51 - * Existing installs with the dead ID get auto-remapped to gemini-3.1-pro-preview
52 - * (Google's official migration target) the first time admin_init fires after update.
53 - */
54 -add_action('admin_init', function () {
55 - if (get_option('mxchat_gemini_3_remap_done')) {
56 - return;
57 - }
58 - $opts = get_option('mxchat_options');
59 - if (is_array($opts) && isset($opts['model']) && $opts['model'] === 'gemini-3-pro-preview') {
60 - $opts['model'] = 'gemini-3.1-pro-preview';
61 - update_option('mxchat_options', $opts);
62 - }
63 - if (is_array($opts) && isset($opts['content_model']) && $opts['content_model'] === 'gemini-3-pro-preview') {
64 - $opts['content_model'] = 'gemini-3.1-pro-preview';
65 - update_option('mxchat_options', $opts);
66 - }
67 - update_option('mxchat_gemini_3_remap_done', 1);
68 -});
69 -
70 -/**
71 - * One-time migration: the Grok 2 family was retired by xAI (grok-2, grok-2-1212,
72 - * grok-2-latest, grok-2-vision-1212 all return 400 "Model not found"). Existing
73 - * installs with the dead ID get auto-remapped to grok-4-1-fast-non-reasoning
74 - * (modern, fast, broadly available) the first time admin_init fires after update.
75 - */
76 -add_action('admin_init', function () {
77 - if (get_option('mxchat_grok_2_remap_done')) {
78 - return;
79 - }
80 - $opts = get_option('mxchat_options');
81 - if (is_array($opts) && isset($opts['model']) && $opts['model'] === 'grok-2') {
82 - $opts['model'] = 'grok-4-1-fast-non-reasoning';
83 - update_option('mxchat_options', $opts);
84 - }
85 - if (is_array($opts) && isset($opts['content_model']) && $opts['content_model'] === 'grok-2') {
86 - $opts['content_model'] = 'grok-4-1-fast-non-reasoning';
87 - update_option('mxchat_options', $opts);
88 - }
89 - update_option('mxchat_grok_2_remap_done', 1);
90 -});
91 -
92 -/**
93 - * One-time migration: Anthropic retired the Claude 4 (2025-05-14) snapshots on
94 - * June 15, 2026 — claude-opus-4-20250514 and claude-sonnet-4-20250514 now return
95 - * an API error. Existing installs with a dead ID get auto-remapped to the current
96 - * equivalents Anthropic recommends (Opus 4.8 / Sonnet 4.6) the first time admin_init
97 - * fires after update. Mirrors the gemini-3-pro-preview / grok-2 rescues above.
98 - */
99 -add_action('admin_init', function () {
100 - if (get_option('mxchat_claude_4_retire_remap_done')) {
101 - return;
102 - }
103 - $map = array(
104 - 'claude-opus-4-20250514' => 'claude-opus-4-8',
105 - 'claude-sonnet-4-20250514' => 'claude-sonnet-4-6',
106 - );
107 - $opts = get_option('mxchat_options');
108 - if (is_array($opts)) {
109 - $changed = false;
110 - if (isset($opts['model']) && isset($map[$opts['model']])) {
111 - $opts['model'] = $map[$opts['model']];
112 - $changed = true;
113 - }
114 - if (isset($opts['content_model']) && isset($map[$opts['content_model']])) {
115 - $opts['content_model'] = $map[$opts['content_model']];
116 - $changed = true;
117 - }
118 - if ($changed) {
119 - update_option('mxchat_options', $opts);
120 - }
121 - }
122 - update_option('mxchat_claude_4_retire_remap_done', 1);
123 -});
124 -
125 -/**
126 - * Exclude MxChat assets from caching plugin optimizations
127 - *
128 - * This prevents issues with WP Rocket, LiteSpeed Cache, Autoptimize, WP Super Cache,
129 - * W3 Total Cache, SG Optimizer, and similar plugins that may break the chatbot by
130 - * removing "unused" CSS, minifying/combining JS, or deferring/delaying jQuery.
131 - *
132 - * Both chat-script.js and floating-script.js depend on jQuery, so jQuery must also
133 - * be excluded from any optimization that changes load order or timing.
134 - */
135 -
136 -// ── WP Rocket ────────────────────────────────────────────────────────────────
137 -
138 -// Exclude from Remove Unused CSS (RUCSS)
139 -add_filter('rocket_rucss_inline_atts_exclusions', function($exclusions) {
140 - if (!is_array($exclusions)) $exclusions = array();
141 - $exclusions[] = 'mxchat';
142 - return $exclusions;
143 -});
144 -
145 -// Exclude CSS from minification/combination
146 -add_filter('rocket_exclude_css', function($excluded) {
147 - if (!is_array($excluded)) $excluded = array();
148 - $excluded[] = '/plugins/mxchat-basic/css/chat-style.css';
149 - return $excluded;
150 -});
151 -
152 -// Exclude JS from minification/combination
153 -add_filter('rocket_exclude_js', function($excluded) {
154 - if (!is_array($excluded)) $excluded = array();
155 - $excluded[] = '/plugins/mxchat-basic/js/chat-script.js';
156 - $excluded[] = '/plugins/mxchat-basic/js/floating-script.js';
157 - $excluded[] = '/jquery-core';
158 - $excluded[] = '/jquery.min.js';
159 - $excluded[] = '/jquery.js';
160 - $excluded[] = '/jquery-migrate';
161 - return $excluded;
162 -});
163 -
164 -// Exclude JS from defer
165 -add_filter('rocket_exclude_defer_js', function($excluded) {
166 - if (!is_array($excluded)) $excluded = array();
167 - $excluded[] = '/plugins/mxchat-basic/js/chat-script.js';
168 - $excluded[] = '/plugins/mxchat-basic/js/floating-script.js';
169 - $excluded[] = '/jquery-core';
170 - $excluded[] = '/jquery.min.js';
171 - $excluded[] = '/jquery.js';
172 - $excluded[] = '/jquery-migrate';
173 - return $excluded;
174 -});
175 -
176 -// Exclude from delay JS execution
177 -add_filter('rocket_delay_js_exclusions', function($excluded) {
178 - if (!is_array($excluded)) $excluded = array();
179 - $excluded[] = 'mxchat';
180 - $excluded[] = 'chat-script';
181 - $excluded[] = 'floating-script';
182 - $excluded[] = '/jquery-core';
183 - $excluded[] = '/jquery.min.js';
184 - $excluded[] = '/jquery.js';
185 - $excluded[] = '/jquery-migrate';
186 - return $excluded;
187 -});
188 -
189 -// ── LiteSpeed Cache ──────────────────────────────────────────────────────────
190 -
191 -// Exclude CSS from optimization
192 -add_filter('litespeed_optimize_css_excludes', function($excluded) {
193 - if (!is_array($excluded)) $excluded = array();
194 - $excluded[] = 'chat-style.css';
195 - $excluded[] = 'mxchat';
196 - return $excluded;
197 -});
198 -
199 -// Exclude from UCSS (Unique CSS) - prevents LiteSpeed from stripping "unused" MxChat CSS
200 -add_filter('litespeed_ucss_whitelist', function($whitelist) {
201 - if (!is_array($whitelist)) $whitelist = array();
202 - $whitelist[] = '.mxchat-chatbot-wrapper';
203 - $whitelist[] = '.floating-chatbot';
204 - $whitelist[] = '.floating-chatbot-button';
205 - $whitelist[] = '.chatbot-top-bar';
206 - $whitelist[] = '.mxchat-chatbot';
207 - $whitelist[] = '.chat-container';
208 - $whitelist[] = '.chat-box';
209 - $whitelist[] = '.bot-message';
210 - $whitelist[] = '.input-container';
211 - $whitelist[] = '.chat-input';
212 - $whitelist[] = '.send-button';
213 - $whitelist[] = '.pre-chat-message';
214 - $whitelist[] = '.mxchat-popular-questions';
215 - $whitelist[] = '.chat-toolbar';
216 - $whitelist[] = '.exit-chat';
217 - $whitelist[] = '.email-blocker';
218 - return $whitelist;
219 -});
220 -
221 -// Exclude CSS from CCSS (Critical CSS) generation
222 -add_filter('litespeed_optm_ccss_exc', function($excluded) {
223 - if (!is_array($excluded)) $excluded = array();
224 - $excluded[] = 'chat-style.css';
225 - $excluded[] = 'mxchat';
226 - return $excluded;
227 -});
228 -
229 -// Exclude JS from defer
230 -add_filter('litespeed_optm_js_defer_exc', function($excluded) {
231 - if (!is_array($excluded)) $excluded = array();
232 - $excluded[] = 'chat-script.js';
233 - $excluded[] = 'floating-script.js';
234 - $excluded[] = 'mxchat';
235 - $excluded[] = 'jquery.min.js';
236 - $excluded[] = 'jquery.js';
237 - return $excluded;
238 -});
239 -
240 -// Exclude JS from combining
241 -add_filter('litespeed_optm_js_exc', function($excluded) {
242 - if (!is_array($excluded)) $excluded = array();
243 - $excluded[] = 'chat-script.js';
244 - $excluded[] = 'floating-script.js';
245 - $excluded[] = 'mxchat';
246 - $excluded[] = 'jquery.min.js';
247 - $excluded[] = 'jquery.js';
248 - return $excluded;
249 -});
250 -
251 -// Exclude JS from delayed execution
252 -add_filter('litespeed_optm_js_delay_exc', function($excluded) {
253 - if (!is_array($excluded)) $excluded = array();
254 - $excluded[] = 'chat-script.js';
255 - $excluded[] = 'floating-script.js';
256 - $excluded[] = 'mxchat';
257 - return $excluded;
258 -});
259 -
260 -// Exclude from Guest Mode optimization
261 -add_filter('litespeed_guest_optm_exc', function($excluded) {
262 - if (!is_array($excluded)) $excluded = array();
263 - $excluded[] = 'mxchat';
264 - $excluded[] = 'chat-style';
265 - $excluded[] = 'chat-script';
266 - $excluded[] = 'floating-script';
267 - return $excluded;
268 -});
269 -
270 -// ── Autoptimize ──────────────────────────────────────────────────────────────
271 -
272 -// Exclude CSS from optimization (comma-separated strings)
273 -add_filter('autoptimize_filter_css_exclude', function($excluded) {
274 - if (!is_string($excluded)) $excluded = '';
275 - return $excluded . ', mxchat, chat-style.css';
276 -});
277 -
278 -// Exclude JS from optimization (comma-separated strings)
279 -add_filter('autoptimize_filter_js_exclude', function($excluded) {
280 - if (!is_string($excluded)) $excluded = '';
281 - return $excluded . ', mxchat, chat-script.js, floating-script.js, jquery.min.js, jquery.js';
282 -});
283 -
284 -// ── SG Optimizer (SiteGround) ────────────────────────────────────────────────
285 -
286 -add_filter('sgo_js_minify_exclude', function($excluded) {
287 - if (!is_array($excluded)) $excluded = array();
288 - $excluded[] = 'chat-script.js';
289 - $excluded[] = 'floating-script.js';
290 - $excluded[] = 'jquery.min.js';
291 - return $excluded;
292 -});
293 -
294 -add_filter('sgo_javascript_combine_exclude', function($excluded) {
295 - if (!is_array($excluded)) $excluded = array();
296 - $excluded[] = 'chat-script.js';
297 - $excluded[] = 'floating-script.js';
298 - $excluded[] = 'jquery.min.js';
299 - return $excluded;
300 -});
301 -
302 -add_filter('sgo_js_async_exclude', function($excluded) {
303 - if (!is_array($excluded)) $excluded = array();
304 - $excluded[] = 'chat-script.js';
305 - $excluded[] = 'floating-script.js';
306 - $excluded[] = 'jquery.min.js';
307 - return $excluded;
308 -});
309 -
310 -// ── W3 Total Cache ───────────────────────────────────────────────────────────
311 -
312 -add_filter('w3tc_minify_js_do_tag_minification', function($do_minify, $script_tag, $file) {
313 - if (strpos($file, 'chat-script.js') !== false ||
314 - strpos($file, 'floating-script.js') !== false ||
315 - strpos($file, 'jquery.min.js') !== false ||
316 - strpos($file, 'jquery.js') !== false) {
317 - return false;
318 - }
319 - return $do_minify;
320 -}, 10, 3);
321 -
322 -// ── WP Super Cache ──────────────────────────────────────────────────────────
323 -
324 -add_filter('wpsc_rejected_uri', function($rejected) {
325 - if (!is_array($rejected)) $rejected = array();
326 - $rejected[] = 'wp-admin/admin-ajax.php';
327 - return $rejected;
328 -});
329 -
330 -// ── Page-cache bypass for chat AJAX (companion to the 3.2.6 nonce-race hotfix)
331 -// Each cache plugin gets its own filter export so that visitors hitting an
332 -// edge-cached page never receive cached chat-AJAX responses. The chat send /
333 -// stream send / file upload all POST to /wp-admin/admin-ajax.php with
334 -// `action=mxchat_*`. Without these exports, a cache plugin can stale a response
335 -// and break the per-session nonce flow on the first message.
336 -
337 -// WP Rocket — `rocket_cache_reject_uri` takes a flat array of regex strings.
338 -add_filter('rocket_cache_reject_uri', function($uris) {
339 - if (!is_array($uris)) $uris = array();
340 - $uris[] = '/wp-admin/admin-ajax\.php\?action=mxchat_.*';
341 - return $uris;
342 -});
343 -
344 -// LiteSpeed Cache — `litespeed_cache_no_cache_for_request` short-circuits
345 -// caching when the request matches our chat-AJAX pattern.
346 -add_filter('litespeed_cache_no_cache_for_request', function($no_cache) {
347 - if ($no_cache) return $no_cache;
348 - if (!empty($_SERVER['REQUEST_URI']) &&
349 - strpos($_SERVER['REQUEST_URI'], '/wp-admin/admin-ajax.php') !== false &&
350 - !empty($_REQUEST['action']) &&
351 - strpos((string) $_REQUEST['action'], 'mxchat_') === 0) {
352 - return true;
353 - }
354 - return $no_cache;
355 -});
356 -
357 -// W3 Total Cache — `w3tc_pgcache_request_skip_uri` flips page-cache off when
358 -// the URI matches.
359 -add_filter('w3tc_pgcache_request_skip_uri', function($skip) {
360 - if ($skip) return $skip;
361 - if (!empty($_SERVER['REQUEST_URI']) &&
362 - strpos($_SERVER['REQUEST_URI'], '/wp-admin/admin-ajax.php') !== false &&
363 - !empty($_REQUEST['action']) &&
364 - strpos((string) $_REQUEST['action'], 'mxchat_') === 0) {
365 - return true;
366 - }
367 - return $skip;
368 -});
369 -
370 -// FlyingPress — `flying_press_cacheable` takes a boolean and is run per
371 -// request. Same pattern as LiteSpeed / W3TC.
372 -add_filter('flying_press_cacheable', function($cacheable) {
373 - if (!$cacheable) return $cacheable;
374 - if (!empty($_SERVER['REQUEST_URI']) &&
375 - strpos($_SERVER['REQUEST_URI'], '/wp-admin/admin-ajax.php') !== false &&
376 - !empty($_REQUEST['action']) &&
377 - strpos((string) $_REQUEST['action'], 'mxchat_') === 0) {
378 - return false;
379 - }
380 - return $cacheable;
381 -});
382 -
383 -// Include classes with error handling
384 -function mxchat_include_classes() {
385 - $class_files = array(
386 - 'includes/class-mxchat-model-catalog.php',
387 - 'includes/class-mxchat-tool-registry.php',
388 - 'includes/class-mxchat-integrator.php',
389 - 'includes/class-mxchat-admin.php',
390 - 'includes/class-mxchat-public.php',
391 - 'includes/class-mxchat-utils.php',
392 - 'includes/class-mxchat-user.php',
393 - 'includes/class-mxchat-meta-box.php',
394 - 'includes/class-mxchat-chunker.php',
395 - 'includes/class-mxchat-word-handler.php',
396 - 'includes/class-mxchat-content-generator.php',
397 - 'includes/class-mxchat-cache-purge.php',
398 - 'includes/class-rest-api.php',
399 - 'admin/class-ajax-handler.php',
400 - 'admin/class-pinecone-manager.php',
401 - 'admin/class-knowledge-manager.php'
402 - );
403 -
404 - foreach ($class_files as $file) {
405 - $file_path = plugin_dir_path(__FILE__) . $file;
406 - if (file_exists($file_path)) {
407 - require_once $file_path;
408 - } else {
409 - //error_log('MxChat: Missing class file - ' . $file);
410 - }
411 - }
412 -
413 - // Register the native function-calling admin-post save handler (a41dee).
414 - if (class_exists('MxChat_Tool_Registry')) {
415 - MxChat_Tool_Registry::init();
416 - }
417 -
418 - // Admin pages that aren't classes (procedural include).
419 - if (is_admin()) {
420 - $admin_api_page = plugin_dir_path(__FILE__) . 'includes/admin-api-page.php';
421 - if (file_exists($admin_api_page)) {
422 - require_once $admin_api_page;
423 - }
424 - // f7c7d4 renamed this file admin-dashboard-page.php → admin-onboarding-page.php.
425 - // The require MUST live here (admin bootstrap) and not just inside
426 - // mxchat_add_plugin_page() on the admin_menu hook — admin_menu does NOT
427 - // fire on admin-ajax.php requests, so the wizard's AJAX handlers
428 - // (plan-905439: mxchat_onboarding_kb_status / save_step / mark_step /
429 - // auto_graduate + the f7c7d4 dismiss handler) would never register.
430 - $admin_onboarding_page = plugin_dir_path(__FILE__) . 'includes/admin-onboarding-page.php';
431 - if (file_exists($admin_onboarding_page)) {
432 - require_once $admin_onboarding_page;
433 - }
434 - }
435 -}
436 -
437 -/**
438 - * Lazy-load the PDF parser library only when needed.
439 - * Avoids loading 44 files on every page request.
440 - */
441 -function mxchat_load_pdf_parser() {
442 - if (class_exists('\Smalot\PdfParser\Parser')) {
443 - return true;
444 - }
445 - $autoload_path = plugin_dir_path(__FILE__) . 'includes/pdf-parser/alt_autoload.php';
446 - if (file_exists($autoload_path)) {
447 - require_once $autoload_path;
448 - return true;
449 - }
450 - return false;
451 -}
452 -
453 -/**
454 - * Create URL click tracking table
455 - */
456 -function mxchat_create_url_clicks_table() {
457 - global $wpdb;
458 -
459 - $table_name = $wpdb->prefix . 'mxchat_url_clicks';
460 -
461 - $charset_collate = $wpdb->get_charset_collate();
462 -
463 - $sql = "CREATE TABLE $table_name (
464 - id mediumint(9) NOT NULL AUTO_INCREMENT,
465 - session_id varchar(100) NOT NULL,
466 - clicked_url text NOT NULL,
467 - message_context text,
468 - click_timestamp datetime DEFAULT CURRENT_TIMESTAMP,
469 - user_ip varchar(45),
470 - user_agent text,
471 - PRIMARY KEY (id),
472 - KEY session_id (session_id),
473 - KEY click_timestamp (click_timestamp)
474 - ) $charset_collate;";
475 -
476 - require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
477 - dbDelta($sql);
478 -}
479 -
480 -/**
481 - * FIXED: Robust table creation and column management
482 - */
483 -function mxchat_create_chat_transcripts_table() {
484 - global $wpdb;
485 -
486 - $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
487 - $charset_collate = $wpdb->get_charset_collate();
488 -
489 - // Create table with ALL columns including user_name from the start
490 - $sql = "CREATE TABLE $table_name (
491 - id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
492 - user_id MEDIUMINT(9) DEFAULT 0,
493 - session_id VARCHAR(255) NOT NULL,
494 - role VARCHAR(255) NOT NULL,
495 - message TEXT NOT NULL,
496 - user_email VARCHAR(255) DEFAULT NULL,
497 - user_name VARCHAR(100) DEFAULT NULL,
498 - user_identifier VARCHAR(255) DEFAULT NULL,
499 - originating_page_url TEXT DEFAULT NULL,
500 - originating_page_title VARCHAR(500) DEFAULT NULL,
501 - timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
502 - PRIMARY KEY (id),
503 - KEY session_id (session_id),
504 - KEY user_email (user_email),
505 - KEY timestamp (timestamp)
506 - ) $charset_collate;";
507 -
508 - require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
509 - $result = dbDelta($sql);
510 -
511 - // Log the result for debugging
512 - if (empty($result)) {
513 - //error_log("MxChat: dbDelta returned empty result for chat transcripts table");
514 - } else {
515 - //error_log("MxChat: dbDelta result: " . print_r($result, true));
516 - }
517 -
518 - // IMPORTANT: Ensure all columns exist for existing installations
519 - mxchat_ensure_all_columns($table_name);
520 -}
521 -
522 -/**
523 - * Ensure all required columns exist (for upgrades)
524 - */
525 -function mxchat_ensure_all_columns($table_name) {
526 - global $wpdb;
527 -
528 - // First check if table exists
529 - $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
530 - if (!$table_exists) {
531 - //error_log("MxChat: Table $table_name does not exist, cannot add columns");
532 - return;
533 - }
534 -
535 - // Define all required columns and their types
536 - $required_columns = [
537 - 'user_identifier' => 'VARCHAR(255) DEFAULT NULL',
538 - 'user_email' => 'VARCHAR(255) DEFAULT NULL',
539 - 'user_name' => 'VARCHAR(100) DEFAULT NULL',
540 - 'originating_page_url' => 'TEXT DEFAULT NULL',
541 - 'originating_page_title' => 'VARCHAR(500) DEFAULT NULL',
542 - 'rag_context' => 'LONGTEXT DEFAULT NULL'
543 - ];
544 -
545 - // Get existing columns
546 - $existing_columns = $wpdb->get_results("SHOW COLUMNS FROM $table_name");
547 - if (empty($existing_columns)) {
548 - //error_log("MxChat: Could not get columns for table $table_name");
549 - return;
550 - }
551 -
552 - $existing_column_names = array_column($existing_columns, 'Field');
553 -
554 - // Add missing columns
555 - foreach ($required_columns as $column_name => $column_definition) {
556 - if (!in_array($column_name, $existing_column_names)) {
557 - $alter_sql = "ALTER TABLE $table_name ADD COLUMN $column_name $column_definition";
558 - $result = $wpdb->query($alter_sql);
559 -
560 - if ($result === false) {
561 - //error_log("MxChat: Failed to add column $column_name to $table_name. Error: " . $wpdb->last_error);
562 - } else {
563 - //error_log("MxChat: Successfully added column $column_name to $table_name");
564 - }
565 - }
566 - }
567 -}
568 -
569 -/**
570 - * Add role restriction column to knowledge base table
571 - */
572 -function mxchat_add_role_restriction_column() {
573 - global $wpdb;
574 - $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
575 -
576 - // Check if table exists first
577 - $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
578 - if (!$table_exists) {
579 - //error_log("MxChat: System prompt content table does not exist, cannot add role_restriction column");
580 - return;
581 - }
582 -
583 - // Check if column already exists
584 - $column_exists = $wpdb->get_results(
585 - $wpdb->prepare(
586 - "SHOW COLUMNS FROM {$table_name} LIKE %s",
587 - 'role_restriction'
588 - )
589 - );
590 -
591 - if (empty($column_exists)) {
592 - $alter_sql = "ALTER TABLE {$table_name} ADD COLUMN role_restriction VARCHAR(50) DEFAULT 'public' AFTER source_url";
593 - $result = $wpdb->query($alter_sql);
594 -
595 - if ($result === false) {
596 - //error_log("MxChat: Failed to add role_restriction column. Error: " . $wpdb->last_error);
597 - } else {
598 - //error_log("MxChat: Successfully added role_restriction column");
599 -
600 - // Set all existing records to 'public' (everyone can access)
601 - $update_result = $wpdb->query(
602 - "UPDATE {$table_name}
603 - SET role_restriction = 'public'
604 - WHERE role_restriction IS NULL OR role_restriction = ''"
605 - );
606 -
607 - if ($update_result !== false) {
608 - //error_log("MxChat: Updated {$update_result} existing records to public access");
609 - }
610 - }
611 - }
612 -}
613 -
614 -/**
615 - * Add enabled_bots column to intents table for multi-bot action filtering
616 - */
617 -function mxchat_add_enabled_bots_column() {
618 - global $wpdb;
619 - $table_name = $wpdb->prefix . 'mxchat_intents';
620 -
621 - // Check if table exists first
622 - $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
623 - if (!$table_exists) {
624 - //error_log("MxChat: Intents table does not exist, cannot add enabled_bots column");
625 - return;
626 - }
627 -
628 - // Check if column already exists
629 - $column_exists = $wpdb->get_results(
630 - $wpdb->prepare(
631 - "SHOW COLUMNS FROM {$table_name} LIKE %s",
632 - 'enabled_bots'
633 - )
634 - );
635 -
636 - if (empty($column_exists)) {
637 - $alter_sql = "ALTER TABLE {$table_name} ADD COLUMN enabled_bots LONGTEXT DEFAULT NULL AFTER enabled";
638 - $result = $wpdb->query($alter_sql);
639 -
640 - if ($result === false) {
641 - //error_log("MxChat: Failed to add enabled_bots column. Error: " . $wpdb->last_error);
642 - } else {
643 - //error_log("MxChat: Successfully added enabled_bots column");
644 -
645 - // Set all existing actions to work with 'default' bot for backward compatibility
646 - $default_bots = json_encode(['default']);
647 - $update_result = $wpdb->query(
648 - $wpdb->prepare(
649 - "UPDATE {$table_name}
650 - SET enabled_bots = %s
651 - WHERE enabled_bots IS NULL OR enabled_bots = ''",
652 - $default_bots
653 - )
654 - );
655 -
656 - if ($update_result !== false) {
657 - //error_log("MxChat: Updated {$update_result} existing actions to work with default bot");
658 - }
659 - }
660 - }
661 -}
662 -
663 -/**
664 - * Create Pinecone role restrictions table with multi-bot support
665 - */
666 -function mxchat_create_pinecone_roles_table() {
667 - global $wpdb;
668 -
669 - $table_name = $wpdb->prefix . 'mxchat_pinecone_roles';
670 - $charset_collate = $wpdb->get_charset_collate();
671 -
672 - $sql = "CREATE TABLE $table_name (
673 - id mediumint(9) NOT NULL AUTO_INCREMENT,
674 - vector_id varchar(255) NOT NULL,
675 - bot_id varchar(50) NOT NULL DEFAULT 'default',
676 - source_url text,
677 - role_restriction varchar(50) DEFAULT 'public',
678 - updated_at timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
679 - PRIMARY KEY (id),
680 - UNIQUE KEY vector_bot (vector_id, bot_id),
681 - KEY role_restriction (role_restriction),
682 - KEY bot_id (bot_id)
683 - ) $charset_collate;";
684 -
685 - require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
686 - dbDelta($sql);
687 -}
688 -
689 -/**
690 - * Add bot_id column to mxchat_pinecone_roles table for multi-bot support
691 - * This migration runs once to update existing installations
692 - */
693 -function mxchat_migrate_pinecone_roles_add_bot_id() {
694 - global $wpdb;
695 -
696 - // Check if migration already ran
697 - $migration_version = get_option('mxchat_pinecone_roles_migration_version', '0');
698 - if (version_compare($migration_version, '2.5.2', '>=')) {
699 - return; // Already migrated
700 - }
701 -
702 - $table_name = $wpdb->prefix . 'mxchat_pinecone_roles';
703 -
704 - // Check if table exists
705 - if ($wpdb->get_var("SHOW TABLES LIKE '{$table_name}'") != $table_name) {
706 - return; // Table doesn't exist yet
707 - }
708 -
709 - // Check if bot_id column already exists
710 - $column_exists = $wpdb->get_results("SHOW COLUMNS FROM {$table_name} LIKE 'bot_id'");
711 -
712 - if (empty($column_exists)) {
713 - // Add bot_id column
714 - $wpdb->query("ALTER TABLE {$table_name} ADD COLUMN bot_id VARCHAR(50) NOT NULL DEFAULT 'default' AFTER vector_id");
715 -
716 - // Update the unique key to include bot_id
717 - $wpdb->query("ALTER TABLE {$table_name} DROP INDEX vector_id");
718 - $wpdb->query("ALTER TABLE {$table_name} ADD UNIQUE KEY vector_bot (vector_id, bot_id)");
719 -
720 - // Add index for bot_id
721 - $wpdb->query("ALTER TABLE {$table_name} ADD KEY bot_id (bot_id)");
722 -
723 - //error_log('MxChat: Successfully added bot_id column to mxchat_pinecone_roles table');
724 - }
725 -
726 - // Mark migration as complete
727 - update_option('mxchat_pinecone_roles_migration_version', '2.5.2');
728 -}
729 -
730 -/**
731 - * 2.5.6: Add content_type column to mxchat_system_prompt_content table
732 - * Enables filtering knowledge base by content type (posts, pages, PDFs, etc.)
733 - */
734 -function mxchat_migrate_add_content_type_column() {
735 - global $wpdb;
736 -
737 - // Check if migration already ran
738 - $migration_version = get_option('mxchat_content_type_migration_version', '0');
739 - if (version_compare($migration_version, '2.5.6', '>=')) {
740 - return;
741 - }
742 -
743 - $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
744 -
745 - // Check if table exists
746 - if ($wpdb->get_var("SHOW TABLES LIKE '{$table_name}'") != $table_name) {
747 - return;
748 - }
749 -
750 - // Check if content_type column already exists
751 - $column_exists = $wpdb->get_results("SHOW COLUMNS FROM {$table_name} LIKE 'content_type'");
752 -
753 - if (empty($column_exists)) {
754 - // Add content_type column with default value 'content' for backwards compatibility
755 - $wpdb->query("ALTER TABLE {$table_name} ADD COLUMN content_type VARCHAR(50) DEFAULT 'content' AFTER role_restriction");
756 -
757 - // Add index for better query performance
758 - $wpdb->query("ALTER TABLE {$table_name} ADD KEY content_type (content_type)");
759 -
760 - //error_log('MxChat: Successfully added content_type column to mxchat_system_prompt_content table');
761 - }
762 -
763 - // Mark migration as complete
764 - update_option('mxchat_content_type_migration_version', '2.5.6');
765 -}
766 -
767 -/**
768 - * 3.2.4: Backfill the active embedding model option for installs that already
769 - * have KB content but no stamped model. The mismatch warning compares this
770 - * against the user's currently selected model — no per-row column needed.
771 - */
772 -function mxchat_backfill_active_embedding_model() {
773 - global $wpdb;
774 -
775 - if (get_option('mxchat_active_embedding_model', '') !== '') {
776 - return;
777 - }
778 -
779 - $kb_table = $wpdb->prefix . 'mxchat_system_prompt_content';
780 - if ($wpdb->get_var("SHOW TABLES LIKE '{$kb_table}'") !== $kb_table) {
781 - return;
782 - }
783 -
784 - $kb_count = (int) $wpdb->get_var("SELECT COUNT(*) FROM {$kb_table}");
785 - if ($kb_count > 0) {
786 - $options = get_option('mxchat_options', array());
787 - $current_model = $options['embedding_model'] ?? 'text-embedding-ada-002';
788 - update_option('mxchat_active_embedding_model', $current_model, false);
789 - }
790 -}
791 -
792 -/**
793 - * 2.5.2: Create queue processing tables for reliable background processing
794 - */
795 -function mxchat_create_queue_tables() {
796 - global $wpdb;
797 - $charset_collate = $wpdb->get_charset_collate();
798 -
799 - // Main queue table
800 - $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
801 - $sql_queue = "CREATE TABLE $queue_table (
802 - id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
803 - queue_id varchar(64) NOT NULL,
804 - item_type varchar(20) NOT NULL,
805 - item_data longtext NOT NULL,
806 - status varchar(20) NOT NULL DEFAULT 'pending',
807 - bot_id varchar(50) NOT NULL DEFAULT 'default',
808 - priority int(11) NOT NULL DEFAULT 0,
809 - attempts int(11) NOT NULL DEFAULT 0,
810 - max_attempts int(11) NOT NULL DEFAULT 3,
811 - error_message text DEFAULT NULL,
812 - created_at datetime NOT NULL,
813 - started_at datetime DEFAULT NULL,
814 - completed_at datetime DEFAULT NULL,
815 - PRIMARY KEY (id),
816 - KEY queue_id (queue_id),
817 - KEY status (status),
818 - KEY item_type (item_type),
819 - KEY priority (priority)
820 - ) $charset_collate;";
821 -
822 - // Queue metadata table
823 - $meta_table = $wpdb->prefix . 'mxchat_queue_meta';
824 - $sql_meta = "CREATE TABLE $meta_table (
825 - id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
826 - queue_id varchar(64) NOT NULL,
827 - meta_key varchar(255) NOT NULL,
828 - meta_value longtext,
829 - PRIMARY KEY (id),
830 - KEY queue_id (queue_id),
831 - KEY meta_key (meta_key)
832 - ) $charset_collate;";
833 -
834 - require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
835 - dbDelta($sql_queue);
836 - dbDelta($sql_meta);
837 -
838 - //error_log("MxChat: Queue tables created/updated successfully");
839 -}
840 -
841 -/**
842 - * Create transcript translations table for persisting translations
843 - */
844 -function mxchat_create_translations_table() {
845 - global $wpdb;
846 - $charset_collate = $wpdb->get_charset_collate();
847 -
848 - $table_name = $wpdb->prefix . 'mxchat_transcript_translations';
849 - $sql = "CREATE TABLE $table_name (
850 - id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
851 - session_id varchar(255) NOT NULL,
852 - language_code varchar(10) NOT NULL,
853 - translations longtext NOT NULL,
854 - created_at datetime NOT NULL,
855 - updated_at datetime NOT NULL,
856 - PRIMARY KEY (id),
857 - UNIQUE KEY session_lang (session_id, language_code),
858 - KEY session_id (session_id)
859 - ) $charset_collate;";
860 -
861 - require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
862 - dbDelta($sql);
863 -}
864 -
865 -/**
866 - * Create per-session satisfaction ratings table (v3.2.6)
867 - * Stores one 👍/👎 rating + optional feedback per chat session.
868 - */
869 -function mxchat_create_session_ratings_table() {
870 - global $wpdb;
871 - $charset_collate = $wpdb->get_charset_collate();
872 -
873 - $table_name = $wpdb->prefix . 'mxchat_session_ratings';
874 - $sql = "CREATE TABLE $table_name (
875 - id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
876 - session_id varchar(255) NOT NULL,
877 - bot_id varchar(50) NOT NULL DEFAULT 'default',
878 - rating_value tinyint(1) NOT NULL,
879 - rating_feedback text DEFAULT NULL,
880 - created_at datetime NOT NULL,
881 - PRIMARY KEY (id),
882 - UNIQUE KEY session_id (session_id),
883 - KEY bot_id (bot_id),
884 - KEY created_at (created_at)
885 - ) $charset_collate;";
886 -
887 - require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
888 - dbDelta($sql);
889 -}
890 -
891 -/**
892 - * 2.5.2: Fix URL column size to support long URLs (especially with UTF-8 encoding)
893 - * This fixes "url, source_url. The supplied values may be too long" errors
894 - */
895 -function mxchat_fix_url_column_size() {
896 - global $wpdb;
897 - $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
898 -
899 - // Check if table exists
900 - $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
901 - if (!$table_exists) {
902 - return;
903 - }
904 -
905 - // Change url and source_url from VARCHAR to TEXT to handle long URLs
906 - // This is especially important for URLs with UTF-8 encoded characters (Hebrew, Arabic, etc.)
907 - $wpdb->query("ALTER TABLE {$table_name} MODIFY COLUMN url TEXT");
908 - $wpdb->query("ALTER TABLE {$table_name} MODIFY COLUMN source_url TEXT");
909 -
910 - //error_log("MxChat: Successfully updated url and source_url columns to TEXT type for long URL support");
911 -}
912 -
913 -/**
914 - * Migrate deprecated AI models to their replacements
915 - * Version 2.5.1: Migrate Claude 3.5 Sonnet (deprecated) to Claude 3.7 Sonnet
916 - * Version 3.1.2: Convert chat transcripts table to utf8mb4 for emoji support
917 - * Without utf8mb4, any bot response containing emojis silently fails to insert.
918 - */
919 -function mxchat_migrate_transcripts_charset() {
920 - global $wpdb;
921 - $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
922 - $wpdb->query("ALTER TABLE $table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci");
923 -}
924 -
925 -/**
926 - * Version 3.0.55: Migrate GPT-4 series models (deprecated 2026-02-17) to GPT-5 series
927 - */
928 -function mxchat_migrate_deprecated_models() {
929 - $options = get_option('mxchat_options', array());
930 - $migrated = false;
931 - $migration_message = '';
932 -
933 - if (!isset($options['model'])) {
934 - return;
935 - }
936 -
937 - $current_model = $options['model'];
938 -
939 - // Migrate deprecated Claude models to Claude Opus 4.6 (recommended replacement per Anthropic)
940 - $deprecated_claude_models = array(
941 - 'claude-3-5-sonnet-20240620', // Retired Oct 28, 2025
942 - 'claude-3-5-sonnet-20241022', // Retired Oct 28, 2025
943 - 'claude-3-7-sonnet-20250219', // Retiring Feb 19, 2026
944 - 'claude-3-opus-20240229', // Retired Jan 5, 2026
945 - 'claude-3-sonnet-20240229', // Legacy
946 - 'claude-3-haiku-20240307', // Legacy
947 - );
948 - if (in_array($current_model, $deprecated_claude_models, true)) {
949 - $options['model'] = 'claude-opus-4-6';
950 - $migrated = true;
951 - $migration_message = sprintf(
952 - 'Your chatbot model has been automatically updated from %s to Claude Opus 4.6 due to Anthropic deprecating older Claude models.',
953 - $current_model
954 - );
955 - }
956 -
957 - // Migrate deprecated Claude Haiku 3.5 to Claude Haiku 4.5
958 - if ($current_model === 'claude-3-5-haiku-20241022') {
959 - $options['model'] = 'claude-haiku-4-5-20251001';
960 - $migrated = true;
961 - $migration_message = 'Your chatbot model has been automatically updated from Claude Haiku 3.5 to Claude Haiku 4.5 due to Anthropic deprecating the older model.';
962 - }
963 -
964 - // Migrate deprecated GPT-4 series and GPT-3.5 Turbo to GPT-5.1 Chat Latest
965 - if (in_array($current_model, array('gpt-4o', 'gpt-4.1-2025-04-14', 'gpt-4-turbo', 'gpt-4', 'gpt-3.5-turbo'), true)) {
966 - $options['model'] = 'gpt-5.1-chat-latest';
967 - $migrated = true;
968 - $migration_message = sprintf(
969 - 'Your chatbot model has been automatically updated from %s to GPT-5.1 Chat Latest due to OpenAI deprecating older models.',
970 - $current_model
971 - );
972 - }
973 -
974 - // Migrate deprecated GPT-4o Mini and GPT-4.1 Mini to GPT-5 Mini
975 - if (in_array($current_model, array('gpt-4o-mini', 'gpt-4.1-mini'), true)) {
976 - $options['model'] = 'gpt-5-mini';
977 - $migrated = true;
978 - $migration_message = sprintf(
979 - 'Your chatbot model has been automatically updated from %s to GPT-5 Mini due to OpenAI deprecating GPT-4 series models.',
980 - $current_model
981 - );
982 - }
983 -
984 - if ($migrated) {
985 - update_option('mxchat_options', $options);
986 - update_option('mxchat_model_migrated_notice', true);
987 - update_option('mxchat_model_migration_message', $migration_message);
988 - }
989 -}
990 -
991 -/**
992 - * Show admin notice after model migration
993 - */
994 -function mxchat_show_migration_notice() {
995 - if (get_option('mxchat_model_migrated_notice')) {
996 - $migration_message = get_option('mxchat_model_migration_message', __('Your chatbot model has been automatically updated due to a model deprecation.', 'mxchat'));
997 - ?>
998 - <div class="notice notice-info is-dismissible">
999 - <p>
1000 - <strong><?php esc_html_e('MxChat Model Updated', 'mxchat'); ?></strong><br>
1001 - <?php echo esc_html($migration_message); ?>
1002 - </p>
1003 - </div>
1004 - <?php
1005 - delete_option('mxchat_model_migrated_notice');
1006 - delete_option('mxchat_model_migration_message');
1007 - }
1008 -}
1009 -
1010 -function mxchat_activate() {
1011 - global $wpdb;
1012 - $charset_collate = $wpdb->get_charset_collate();
1013 -
1014 - //error_log("MxChat: Running activation function");
1015 -
1016 - // Create chat transcripts table with improved function
1017 - mxchat_create_chat_transcripts_table();
1018 -
1019 - // System Prompt Content Table - UPDATED: Use TEXT for url and source_url columns
1020 - $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
1021 - $sql_system_prompt = "CREATE TABLE $system_prompt_table (
1022 - id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
1023 - url TEXT NOT NULL,
1024 - article_content LONGTEXT NOT NULL,
1025 - embedding_vector LONGTEXT,
1026 - source_url TEXT DEFAULT NULL,
1027 - role_restriction VARCHAR(50) DEFAULT 'public',
1028 - content_type VARCHAR(50) DEFAULT 'content',
1029 - timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
1030 - PRIMARY KEY (id),
1031 - KEY content_type (content_type)
1032 - ) $charset_collate;";
1033 -
1034 - // Intents Table - NOW INCLUDES enabled_bots column from the start
1035 - $intents_table = $wpdb->prefix . 'mxchat_intents';
1036 - $sql_intents_table = "CREATE TABLE $intents_table (
1037 - id BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
1038 - intent_label VARCHAR(255) NOT NULL,
1039 - phrases TEXT NOT NULL,
1040 - embedding_vector LONGTEXT NOT NULL,
1041 - callback_function VARCHAR(255) NOT NULL,
1042 - similarity_threshold FLOAT DEFAULT 0.85,
1043 - enabled TINYINT(1) NOT NULL DEFAULT 1,
1044 - enabled_bots LONGTEXT DEFAULT NULL,
1045 - PRIMARY KEY (id)
1046 - ) $charset_collate;";
1047 -
1048 - // Individual Intent Phrases Table - each phrase gets its own embedding vector
1049 - $intent_phrases_table = $wpdb->prefix . 'mxchat_intent_phrases';
1050 - $sql_intent_phrases_table = "CREATE TABLE $intent_phrases_table (
1051 - id BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
1052 - intent_id BIGINT(20) UNSIGNED NOT NULL,
1053 - phrase TEXT NOT NULL,
1054 - embedding_vector LONGTEXT NOT NULL,
1055 - created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
1056 - PRIMARY KEY (id),
1057 - KEY intent_id (intent_id)
1058 - ) $charset_collate;";
1059 -
1060 - require_once ABSPATH . 'wp-admin/includes/upgrade.php';
1061 -
1062 - // Create other tables
1063 - dbDelta($sql_system_prompt);
1064 - dbDelta($sql_intents_table);
1065 - dbDelta($sql_intent_phrases_table);
1066 -
1067 - // Create URL click tracking table
1068 - mxchat_create_url_clicks_table();
1069 -
1070 - // Create Pinecone roles table
1071 - mxchat_create_pinecone_roles_table();
1072 -
1073 - // NEW 2.5.2: Create queue processing tables
1074 - mxchat_create_queue_tables();
1075 -
1076 - // Create transcript translations table
1077 - mxchat_create_translations_table();
1078 -
1079 - // Create per-session satisfaction ratings table (v3.2.6)
1080 - mxchat_create_session_ratings_table();
1081 -
1082 - // Ensure additional columns in system prompt table
1083 - $existing_system_columns = $wpdb->get_results("SHOW COLUMNS FROM $system_prompt_table");
1084 - if (!empty($existing_system_columns)) {
1085 - $existing_system_column_names = array_column($existing_system_columns, 'Field');
1086 -
1087 - if (!in_array('embedding_vector', $existing_system_column_names)) {
1088 - $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN embedding_vector LONGTEXT");
1089 - }
1090 - if (!in_array('source_url', $existing_system_column_names)) {
1091 - $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN source_url TEXT DEFAULT NULL");
1092 - }
1093 - if (!in_array('role_restriction', $existing_system_column_names)) {
1094 - $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN role_restriction VARCHAR(50) DEFAULT 'public' AFTER source_url");
1095 - }
1096 - }
1097 -
1098 - // Set default thresholds for existing intents
1099 - $wpdb->query("UPDATE {$intents_table} SET similarity_threshold = 0.85 WHERE similarity_threshold IS NULL");
1100 -
1101 - // Ensure enabled column exists in intents table
1102 - $existing_intent_columns = $wpdb->get_results("SHOW COLUMNS FROM $intents_table");
1103 - if (!empty($existing_intent_columns)) {
1104 - $existing_intent_column_names = array_column($existing_intent_columns, 'Field');
1105 -
1106 - if (!in_array('enabled', $existing_intent_column_names)) {
1107 - $wpdb->query("ALTER TABLE $intents_table ADD COLUMN enabled TINYINT(1) NOT NULL DEFAULT 1");
1108 - }
1109 -
1110 - // Ensure enabled_bots column exists for existing installations
1111 - if (!in_array('enabled_bots', $existing_intent_column_names)) {
1112 - $wpdb->query("ALTER TABLE $intents_table ADD COLUMN enabled_bots LONGTEXT DEFAULT NULL AFTER enabled");
1113 -
1114 - // Set existing actions to work with default bot
1115 - $default_bots = json_encode(['default']);
1116 - $wpdb->query($wpdb->prepare(
1117 - "UPDATE {$intents_table} SET enabled_bots = %s WHERE enabled_bots IS NULL",
1118 - $default_bots
1119 - ));
1120 - }
1121 - }
1122 -
1123 - // Run migration for existing installations
1124 - mxchat_migrate_pinecone_roles_add_bot_id();
1125 -
1126 - // 3.2.4: Backfill active embedding model option (replaces 3.2.3 column-based tracking)
1127 - mxchat_backfill_active_embedding_model();
1128 -
1129 - // Setup cron jobs
1130 - mxchat_setup_cron_jobs();
1131 -
1132 - // Update version
1133 - update_option('mxchat_plugin_version', MXCHAT_VERSION);
1134 -
1135 - //error_log("MxChat: Activation function completed");
1136 -}
1137 -
1138 -/**
1139 - * Setup cron jobs on plugin activation
1140 - */
1141 -function mxchat_setup_cron_jobs() {
1142 - // Clear any existing cron jobs first
1143 - wp_clear_scheduled_hook('mxchat_reset_rate_limits');
1144 -
1145 - // Check if WordPress cron is disabled
1146 - if (defined('DISABLE_WP_CRON') && DISABLE_WP_CRON) {
1147 - // Set flag to use fallback system
1148 - update_option('mxchat_use_fallback_rate_limits', true);
1149 - update_option('mxchat_next_rate_limit_check', time() + 3600);
1150 - return;
1151 - }
1152 -
1153 - // Schedule the rate limit reset cron job
1154 - $result = wp_schedule_event(time() + 300, 'hourly', 'mxchat_reset_rate_limits');
1155 -
1156 - if ($result === false) {
1157 - // Fallback if scheduling fails
1158 - update_option('mxchat_use_fallback_rate_limits', true);
1159 - update_option('mxchat_next_rate_limit_check', time() + 3600);
1160 - } else {
1161 - // Clear fallback flags if cron scheduling succeeded
1162 - delete_option('mxchat_use_fallback_rate_limits');
1163 - }
1164 -
1165 - // Schedule transcript cleanup if configured (bucket dropdown OR custom retention-days > 0)
1166 - $transcript_options = get_option('mxchat_transcripts_options', array());
1167 - $cleanup_interval = isset($transcript_options['mxchat_auto_delete_transcripts']) ? $transcript_options['mxchat_auto_delete_transcripts'] : 'never';
1168 - $custom_retention = isset($transcript_options['mxchat_retention_days']) ? (int) $transcript_options['mxchat_retention_days'] : 0;
1169 -
1170 - if ($cleanup_interval !== 'never' || $custom_retention > 0) {
1171 - // Check if not already scheduled
1172 - if (!wp_next_scheduled('mxchat_cleanup_old_transcripts')) {
1173 - // Schedule to run daily at 3 AM
1174 - $next_run = strtotime('tomorrow 3:00 AM');
1175 - wp_schedule_event($next_run, 'daily', 'mxchat_cleanup_old_transcripts');
1176 - }
1177 - }
1178 -}
1179 -
1180 -/**
1181 - * Clean up on plugin deactivation
1182 - */
1183 -function mxchat_deactivate() {
1184 - // Clear scheduled cron jobs
1185 - wp_clear_scheduled_hook('mxchat_reset_rate_limits');
1186 - wp_clear_scheduled_hook('mxchat_cleanup_old_transcripts');
1187 - wp_clear_scheduled_hook('mxchat_send_delayed_transcript');
1188 -
1189 - // Clear fallback options
1190 - delete_option('mxchat_use_fallback_rate_limits');
1191 - delete_option('mxchat_next_rate_limit_check');
1192 - delete_option('mxchat_fallback_check_interval');
1193 -
1194 - // NOTE: We do NOT delete queue tables on deactivation
1195 - // This preserves data if user accidentally deactivates the plugin
1196 -}
1197 -
1198 -/**
1199 - * Check if fallback rate limit cleanup is needed
1200 - */
1201 -function mxchat_check_fallback_rate_limits() {
1202 - $use_fallback = get_option('mxchat_use_fallback_rate_limits', false);
1203 -
1204 - if (!$use_fallback) {
1205 - return;
1206 - }
1207 -
1208 - $next_check = get_option('mxchat_next_rate_limit_check', 0);
1209 -
1210 - if (time() >= $next_check) {
1211 - // Only run reset if the MxChat_Integrator class exists
1212 - if (class_exists('MxChat_Integrator')) {
1213 - $integrator = new MxChat_Integrator();
1214 - if (method_exists($integrator, 'mxchat_reset_rate_limits')) {
1215 - $integrator->mxchat_reset_rate_limits();
1216 - update_option('mxchat_next_rate_limit_check', time() + 3600);
1217 - }
1218 - }
1219 - }
1220 -}
1221 -
1222 -/**
1223 - * Robust update checking with role restriction migration, model deprecation, and queue tables
1224 - * CRITICAL: This runs on EVERY page load to ensure tables exist
1225 - */
1226 -function mxchat_check_for_update() {
1227 - global $wpdb;
1228 -
1229 - try {
1230 - $current_version = get_option('mxchat_plugin_version', '0.0.0');
1231 - $plugin_version = MXCHAT_VERSION;
1232 -
1233 - // Always ensure critical tables exist (even if version matches)
1234 - // This handles manual table deletion or fresh installs
1235 - $chat_table = $wpdb->prefix . 'mxchat_chat_transcripts';
1236 - $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
1237 -
1238 - $chat_exists = $wpdb->get_var("SHOW TABLES LIKE '$chat_table'") === $chat_table;
1239 - $queue_exists = $wpdb->get_var("SHOW TABLES LIKE '$queue_table'") === $queue_table;
1240 -
1241 - if (!$chat_exists || !$queue_exists) {
1242 - //error_log("MxChat: Critical tables missing, running activation");
1243 - mxchat_activate();
1244 - }
1245 -
1246 - // Version-specific migrations
1247 - if ($current_version !== $plugin_version) {
1248 - //error_log("MxChat: Version change detected: $current_version -> $plugin_version");
1249 -
1250 - // Run live agent update BEFORE updating the stored version
1251 - mxchat_handle_live_agent_update();
1252 -
1253 - // Run theme migration notice for 3.0.1 (AI theme CSS structure changes)
1254 - mxchat_handle_theme_migration_notice();
1255 -
1256 - // Run role restriction migration for 2.4.1
1257 - if (version_compare($current_version, '2.4.1', '<')) {
1258 - mxchat_add_role_restriction_column();
1259 - }
1260 -
1261 - // Run enabled_bots column migration for 2.4.4
1262 - if (version_compare($current_version, '2.4.4', '<')) {
1263 - mxchat_add_enabled_bots_column();
1264 - }
1265 -
1266 - // Run model migration for 2.5.1 (Claude deprecation)
1267 - if (version_compare($current_version, '2.5.1', '<')) {
1268 - mxchat_migrate_deprecated_models();
1269 - }
1270 -
1271 - // 2.5.2: Ensure queue tables exist and fix URL column sizes for all users upgrading to 2.5.2
1272 - if (version_compare($current_version, '2.5.2', '<')) {
1273 - mxchat_create_queue_tables();
1274 - mxchat_fix_url_column_size(); // NEW: Fix URL column size for long URLs
1275 - //error_log("MxChat: Queue tables created and URL columns updated for upgrade to 2.5.2");
1276 - }
1277 -
1278 - // 2.6.0: Ensure rag_context column exists for retrieved documents feature
1279 - if (version_compare($current_version, '2.6.0', '<')) {
1280 - $chat_table = $wpdb->prefix . 'mxchat_chat_transcripts';
1281 - mxchat_ensure_all_columns($chat_table);
1282 - //error_log("MxChat: rag_context column migration for 2.6.0");
1283 - }
1284 -
1285 - // 3.0.5: Migrate deprecated Gemini embedding model
1286 - if (version_compare($current_version, '3.0.5', '<')) {
1287 - mxchat_migrate_gemini_embedding_model();
1288 - }
1289 -
1290 - // 3.0.6: Migrate deprecated OpenAI and Claude models
1291 - if (version_compare($current_version, '3.0.6', '<')) {
1292 - mxchat_migrate_deprecated_models();
1293 - }
1294 -
1295 - // 3.1.2: Convert chat transcripts table to utf8mb4 for emoji support
1296 - if (version_compare($current_version, '3.1.2', '<')) {
1297 - mxchat_migrate_transcripts_charset();
1298 - }
1299 -
1300 - // 3.1.7: Clean up stale shared session email/name entries
1301 - if (version_compare($current_version, '3.1.7', '<')) {
1302 - delete_option('mxchat_email_null');
1303 - delete_option('mxchat_name_null');
1304 - }
1305 -
1306 - // 3.2.4: Backfill active embedding model option for the warning UI
1307 - // (replaces the per-row column tracking from 3.2.3, which was reverted)
1308 - if (version_compare($current_version, '3.2.4', '<')) {
1309 - mxchat_backfill_active_embedding_model();
1310 - }
1311 -
1312 - // Run full activation to ensure everything is up to date
1313 - mxchat_activate();
1314 -
1315 - // Run migration functions
1316 - mxchat_migrate_live_agent_status();
1317 -
1318 - // Add the cleanup function for version 2.1.8
1319 - if (version_compare($current_version, '2.1.8', '<')) {
1320 - $deleted = mxchat_cleanup_orphaned_chat_history();
1321 - }
1322 -
1323 - // Update version LAST
1324 - update_option('mxchat_plugin_version', $plugin_version);
1325 -
1326 - //error_log("MxChat: Updated from version $current_version to $plugin_version");
1327 - }
1328 -
1329 - } catch (Exception $e) {
1330 - //error_log('MxChat update error: ' . $e->getMessage());
1331 - // Don't update version if there was an error
1332 - }
1333 -}
1334 -
1335 -/**
1336 - * Ensure tables exist on every admin load for fresh installations
1337 - * This is a safety net for cases where activation hook doesn't fire
1338 - */
1339 -function mxchat_ensure_tables_exist() {
1340 - global $wpdb;
1341 -
1342 - // Only run for admin users to avoid performance impact
1343 - if (!current_user_can('administrator')) {
1344 - return;
1345 - }
1346 -
1347 - // Check if we've already verified tables in this session
1348 - static $tables_checked = false;
1349 - if ($tables_checked) {
1350 - return;
1351 - }
1352 - $tables_checked = true;
1353 -
1354 - $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
1355 - $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
1356 -
1357 - $chat_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
1358 - $queue_exists = $wpdb->get_var("SHOW TABLES LIKE '$queue_table'") === $queue_table;
1359 -
1360 - if (!$chat_exists || !$queue_exists) {
1361 - //error_log("MxChat: Tables missing on admin load, running activation");
1362 - mxchat_activate();
1363 - }
1364 -}
1365 -
1366 -/**
1367 - * Clean up orphaned chat history options from the wp_options table
1368 - * @return int Number of options deleted
1369 - */
1370 -function mxchat_cleanup_orphaned_chat_history() {
1371 - global $wpdb;
1372 - $count = 0;
1373 -
1374 - // Get all option keys that match our pattern
1375 - $history_options = $wpdb->get_results(
1376 - "SELECT option_name FROM {$wpdb->options}
1377 - WHERE option_name LIKE 'mxchat_history_%'"
1378 - );
1379 -
1380 - if (!empty($history_options)) {
1381 - foreach ($history_options as $option) {
1382 - // Extract the session ID from the option name
1383 - $session_id = str_replace('mxchat_history_', '', $option->option_name);
1384 -
1385 - // Check if this session still exists in the custom table
1386 - $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
1387 - $exists = $wpdb->get_var(
1388 - $wpdb->prepare(
1389 - "SELECT COUNT(*) FROM {$table_name} WHERE session_id = %s",
1390 - $session_id
1391 - )
1392 - );
1393 -
1394 - // If session doesn't exist in the main table, delete the option
1395 - if ($exists == 0) {
1396 - delete_option($option->option_name);
1397 - // Also delete related metadata
1398 - delete_option("mxchat_email_{$session_id}");
1399 - delete_option("mxchat_name_{$session_id}");
1400 - delete_option("mxchat_agent_name_{$session_id}");
1401 - $count++;
1402 - }
1403 - }
1404 - }
1405 -
1406 - return $count;
1407 -}
1408 -
1409 -function mxchat_migrate_live_agent_status() {
1410 - $options = get_option('mxchat_options', []);
1411 -
1412 - // Check if live_agent_status exists
1413 - if (isset($options['live_agent_status'])) {
1414 - $current_status = $options['live_agent_status'];
1415 - $needs_update = false;
1416 -
1417 - // Convert to new format if needed
1418 - if ($current_status === 'online') {
1419 - $options['live_agent_status'] = 'on';
1420 - $needs_update = true;
1421 - } else if ($current_status === 'offline') {
1422 - $options['live_agent_status'] = 'off';
1423 - $needs_update = true;
1424 - } else if (!in_array($current_status, ['on', 'off'])) {
1425 - // Default to off for any unexpected values
1426 - $options['live_agent_status'] = 'off';
1427 - $needs_update = true;
1428 - }
1429 -
1430 - // Only update if needed
1431 - if ($needs_update) {
1432 - update_option('mxchat_options', $options);
1433 - }
1434 - } else {
1435 - // If status doesn't exist, set default to off
1436 - $options['live_agent_status'] = 'off';
1437 - update_option('mxchat_options', $options);
1438 - }
1439 -}
1440 -
1441 -function mxchat_handle_live_agent_update() {
1442 - // Get the CURRENT stored version (before it gets updated)
1443 - $current_version = get_option('mxchat_plugin_version', '0.0.0');
1444 - $new_version = '2.2.2';
1445 -
1446 - // Only run this once for the update to 2.2.2
1447 - $update_handled = get_option('mxchat_live_agent_update_2_2_2_handled', false);
1448 -
1449 - // Check if we're upgrading TO 2.2.2 and haven't handled this yet
1450 - if (version_compare($current_version, $new_version, '<') && !$update_handled) {
1451 - $options = get_option('mxchat_options', array());
1452 -
1453 - // Check if live agent was previously enabled
1454 - if (isset($options['live_agent_status']) && $options['live_agent_status'] === 'on') {
1455 - // Disable live agent
1456 - $options['live_agent_status'] = 'off';
1457 - update_option('mxchat_options', $options);
1458 -
1459 - // Set flag to show the notification banner
1460 - update_option('mxchat_show_live_agent_disabled_notice', true);
1461 - }
1462 -
1463 - // Mark this update as handled
1464 - update_option('mxchat_live_agent_update_2_2_2_handled', true);
1465 - }
1466 -}
1467 -
1468 -/**
1469 - * Handle theme migration notice for version 3.0.1
1470 - * Shows a dismissible notice to Pro users about migrating AI-generated themes
1471 - */
1472 -function mxchat_handle_theme_migration_notice() {
1473 - // Get the CURRENT stored version (before it gets updated)
1474 - $current_version = get_option('mxchat_plugin_version', '0.0.0');
1475 - $target_version = '3.0.1';
1476 -
1477 - // Only run this once for the update to 3.0.1
1478 - $update_handled = get_option('mxchat_theme_migration_update_3_0_1_handled', false);
1479 -
1480 - // Check if we're upgrading TO 3.0.1 and haven't handled this yet
1481 - if (version_compare($current_version, $target_version, '<') && !$update_handled) {
1482 - // Check if Pro is activated - only show to Pro users
1483 - $license_status = get_option('mxchat_license_status', 'inactive');
1484 - $is_pro = ($license_status === 'active');
1485 -
1486 - if ($is_pro) {
1487 - // Set flag to show the theme migration notification banner
1488 - update_option('mxchat_show_theme_migration_notice', true);
1489 - }
1490 -
1491 - // Mark this update as handled (whether Pro or not)
1492 - update_option('mxchat_theme_migration_update_3_0_1_handled', true);
1493 - }
1494 -}
1495 -
1496 -// Initialize plugin safely
1497 -function mxchat_init() {
1498 - // Include all class files first
1499 - mxchat_include_classes();
1500 -
1501 - // Run update check (this also ensures tables exist)
1502 - mxchat_check_for_update();
1503 -
1504 - // CRITICAL: Ensure tables exist on admin pages (safety net)
1505 - add_action('admin_init', 'mxchat_ensure_tables_exist', 1);
1506 -
1507 - // Add fallback rate limit check
1508 - add_action('init', 'mxchat_check_fallback_rate_limits', 5);
1509 -
1510 - // Add migration notice hook
1511 - add_action('admin_notices', 'mxchat_show_migration_notice');
1512 -
1513 - // Initialize classes with error handling
1514 - try {
1515 - // Initialize admin classes
1516 - if (is_admin()) {
1517 - if (class_exists('MxChat_Knowledge_Manager')) {
1518 - $mxchat_knowledge_manager = new MxChat_Knowledge_Manager();
1519 -
1520 - if (class_exists('MxChat_Admin')) {
1521 - $mxchat_admin = new MxChat_Admin($mxchat_knowledge_manager);
1522 - }
1523 - }
1524 -
1525 - // Initialize meta box class
1526 - if (class_exists('MxChat_Meta_Box')) {
1527 - new MxChat_Meta_Box();
1528 - }
1529 -
1530 - }
1531 -
1532 - // Initialize content generator globally — it registers wp_head hook
1533 - // for frontend CSS injection, plus wp_ajax_ hooks for admin.
1534 - if (class_exists('MxChat_Content_Generator')) {
1535 - new MxChat_Content_Generator();
1536 - }
1537 -
1538 - // Initialize cache purge globally — settings writes can happen on any
1539 - // request type (admin screens, admin-ajax autosave, wp-cli), and the
1540 - // deferred-purge cron event fires on front-end requests.
1541 - if (class_exists('MxChat_Cache_Purge')) {
1542 - MxChat_Cache_Purge::init();
1543 - }
1544 -
1545 - // Initialize REST API globally — endpoints must be registered on
1546 - // every request (admin and frontend) so they're reachable via /wp-json/.
1547 - // Endpoints are auth-gated and locked until the site owner generates
1548 - // a token in MxChat → API Access.
1549 - if (class_exists('MxChat_Rest_Api')) {
1550 - new MxChat_Rest_Api();
1551 - }
1552 -
1553 - // Initialize public classes
1554 - if (class_exists('MxChat_Public')) {
1555 - $mxchat_public = new MxChat_Public();
1556 - }
1557 -
1558 - if (class_exists('MxChat_Integrator')) {
1559 - global $mxchat_integrator;
1560 - $mxchat_integrator = new MxChat_Integrator();
1561 - }
1562 -
1563 - } catch (Exception $e) {
1564 - //error_log('MxChat initialization error: ' . $e->getMessage());
1565 -
1566 - // Show admin notice if there's an error
1567 - if (is_admin()) {
1568 - add_action('admin_notices', function() use ($e) {
1569 - echo '<div class="notice notice-error"><p>';
1570 - echo '<strong>MxChat Error:</strong> Plugin initialization failed. ';
1571 - echo 'Please check error logs or contact support. Error: ' . esc_html($e->getMessage());
1572 - echo '</p></div>';
1573 - });
1574 - }
1575 - }
1576 -}
1577 -
1578 -// Run initialization on plugins_loaded
1579 -add_action('plugins_loaded', 'mxchat_init');
1580 -
1581 -// Run migration check on admin init (for auto-updates without reactivation)
1582 -add_action('admin_init', 'mxchat_check_and_run_migrations');
1583 -
1584 -/**
1585 - * Check and run migrations on admin init
1586 - * This ensures migrations run even when plugin is auto-updated
1587 - */
1588 -function mxchat_check_and_run_migrations() {
1589 - // Only run in admin and not on every request
1590 - static $checked = false;
1591 - if ($checked) {
1592 - return;
1593 - }
1594 - $checked = true;
1595 -
1596 - mxchat_migrate_pinecone_roles_add_bot_id();
1597 - mxchat_migrate_add_content_type_column();
1598 - mxchat_migrate_add_translations_table();
1599 - mxchat_migrate_add_session_ratings_table();
1600 -}
1601 -
1602 -/**
1603 - * Migration: Create per-session satisfaction ratings table (v3.2.6)
1604 - * For users upgrading from versions before 3.2.6
1605 - */
1606 -function mxchat_migrate_add_session_ratings_table() {
1607 - $migration_key = 'mxchat_session_ratings_table_created';
1608 - if (get_option($migration_key)) {
1609 - return;
1610 - }
1611 - mxchat_create_session_ratings_table();
1612 - update_option($migration_key, '3.2.6');
1613 -}
1614 -
1615 -/**
1616 - * Migration: Create transcript translations table (v3.0.4)
1617 - * For users upgrading from versions before 3.0.4
1618 - */
1619 -function mxchat_migrate_add_translations_table() {
1620 - $migration_key = 'mxchat_translations_table_created';
1621 -
1622 - // Check if migration already ran
1623 - if (get_option($migration_key)) {
1624 - return;
1625 - }
1626 -
1627 - // Create the translations table
1628 - mxchat_create_translations_table();
1629 -
1630 - // Mark migration as complete
1631 - update_option($migration_key, '3.0.4');
1632 -}
1633 -
1634 -/**
1635 - * Migration: Update deprecated Gemini embedding model (v3.0.5)
1636 - * Updates gemini-embedding-exp-03-07 to gemini-embedding-001 for users who had it selected
1637 - */
1638 -function mxchat_migrate_gemini_embedding_model() {
1639 - $options = get_option('mxchat_options', array());
1640 -
1641 - if (isset($options['embedding_model']) && $options['embedding_model'] === 'gemini-embedding-exp-03-07') {
1642 - $options['embedding_model'] = 'gemini-embedding-001';
1643 - update_option('mxchat_options', $options);
1644 - }
1645 -}
1646 -
1647 -// Register activation hook
1648 -register_activation_hook(__FILE__, 'mxchat_activate');
1649 -
1650 -// Add cron schedule
1651 -add_filter('cron_schedules', function($schedules) {
1652 - $schedules['one_minute'] = array(
1653 - 'interval' => 60,
1654 - 'display' => 'Every Minute'
1655 - );
1656 - return $schedules;
1657 -});
1658 -
1659 -// Register deactivation hook
1660 -register_deactivation_hook(__FILE__, 'mxchat_deactivate');
1661 -
1662 -/**
1663 - * Per-session satisfaction rating: AJAX save handler (v3.2.6).
1664 - * Records one 👍/👎 + optional feedback per chat session. The UNIQUE KEY on
1665 - * session_id makes this naturally idempotent — only the first rating per
1666 - * session is stored; duplicate POSTs are silent no-ops.
1667 - */
1668 -function mxchat_save_session_rating() {
1669 - global $wpdb;
1670 -
1671 - $session_id = isset($_POST['session_id']) ? sanitize_text_field(wp_unslash($_POST['session_id'])) : '';
1672 - $bot_id = isset($_POST['bot_id']) ? sanitize_text_field(wp_unslash($_POST['bot_id'])) : 'default';
1673 - $rating_raw = isset($_POST['rating']) ? (int) $_POST['rating'] : 0;
1674 - $feedback = isset($_POST['feedback']) ? sanitize_textarea_field(wp_unslash($_POST['feedback'])) : '';
1675 -
1676 - if ($session_id === '' || ($rating_raw !== 1 && $rating_raw !== -1)) {
1677 - wp_send_json_error(array('message' => 'invalid_input'), 400);
1678 - }
1679 -
1680 - if (strlen($feedback) > 1000) {
1681 - $feedback = substr($feedback, 0, 1000);
1682 - }
1683 -
1684 - $table_name = $wpdb->prefix . 'mxchat_session_ratings';
1685 - $existing = $wpdb->get_var($wpdb->prepare(
1686 - "SELECT id FROM $table_name WHERE session_id = %s LIMIT 1",
1687 - $session_id
1688 - ));
1689 -
1690 - if ($existing) {
1691 - if ($feedback !== '') {
1692 - $wpdb->update(
1693 - $table_name,
1694 - array('rating_feedback' => $feedback),
1695 - array('id' => (int) $existing),
1696 - array('%s'),
1697 - array('%d')
1698 - );
1699 - }
1700 - wp_send_json_success(array('updated' => true));
1701 - }
1702 -
1703 - $inserted = $wpdb->insert(
1704 - $table_name,
1705 - array(
1706 - 'session_id' => $session_id,
1707 - 'bot_id' => $bot_id !== '' ? $bot_id : 'default',
1708 - 'rating_value' => $rating_raw,
1709 - 'rating_feedback' => $feedback !== '' ? $feedback : null,
1710 - 'created_at' => current_time('mysql'),
1711 - ),
1712 - array('%s', '%s', '%d', '%s', '%s')
1713 - );
1714 -
1715 - if ($inserted === false) {
1716 - wp_send_json_error(array('message' => 'db_insert_failed'), 500);
1717 - }
1718 -
1719 - wp_send_json_success(array('saved' => true));
1720 -}
1721 -add_action('wp_ajax_mxchat_save_rating', 'mxchat_save_session_rating');
1722 -add_action('wp_ajax_nopriv_mxchat_save_rating', 'mxchat_save_session_rating');
1 +<?php
2 +/**
3 + * Plugin Name: MxChat
4 + * Plugin URI: https://mxchat.ai/
5 + * Description: AI chatbot for WordPress with OpenAI, Claude, xAI, DeepSeek, live agent, PDF uploads, WooCommerce, and training on website data.
6 + * Version: 3.0.4
7 + * Author: MxChat
8 + * Author URI: https://mxchat.ai
9 + * License: GPLv2 or later
10 + * License URI: https://www.gnu.org/licenses/gpl-2.0.html
11 + * Text Domain: mxchat
12 + * Domain Path: /languages
13 + */
14 +
15 +if (!defined('ABSPATH')) {
16 + exit; // Exit if accessed directly.
17 +}
18 +
19 +// Define plugin version constant for asset versioning
20 +// Reads version from plugin header automatically
21 +if (!defined('MXCHAT_VERSION')) {
22 + $plugin_data = get_file_data(__FILE__, array('Version' => 'Version'), 'plugin');
23 + define('MXCHAT_VERSION', $plugin_data['Version']);
24 +}
25 +
26 +function mxchat_load_textdomain() {
27 + $domain = 'mxchat';
28 + $locale = determine_locale();
29 +
30 + // First, try to load from /wp-content/languages/plugins/ (preserved during updates)
31 + $mo_file = WP_LANG_DIR . '/plugins/' . $domain . '-' . $locale . '.mo';
32 + if (file_exists($mo_file)) {
33 + load_textdomain($domain, $mo_file);
34 + return;
35 + }
36 +
37 + // Fallback to plugin's /languages directory
38 + load_plugin_textdomain($domain, false, dirname(plugin_basename(__FILE__)) . '/languages');
39 +}
40 +add_action('init', 'mxchat_load_textdomain');
41 +
42 +// Include classes with error handling
43 +function mxchat_include_classes() {
44 + $class_files = array(
45 + 'includes/class-mxchat-integrator.php',
46 + 'includes/class-mxchat-admin.php',
47 + 'includes/class-mxchat-public.php',
48 + 'includes/class-mxchat-utils.php',
49 + 'includes/class-mxchat-user.php',
50 + 'includes/class-mxchat-meta-box.php',
51 + 'includes/class-mxchat-chunker.php',
52 + 'includes/pdf-parser/alt_autoload.php',
53 + 'includes/class-mxchat-word-handler.php',
54 + 'admin/class-ajax-handler.php',
55 + 'admin/class-pinecone-manager.php',
56 + 'admin/class-knowledge-manager.php'
57 + );
58 +
59 + foreach ($class_files as $file) {
60 + $file_path = plugin_dir_path(__FILE__) . $file;
61 + if (file_exists($file_path)) {
62 + require_once $file_path;
63 + } else {
64 + //error_log('MxChat: Missing class file - ' . $file);
65 + }
66 + }
67 +}
68 +
69 +/**
70 + * Create URL click tracking table
71 + */
72 +function mxchat_create_url_clicks_table() {
73 + global $wpdb;
74 +
75 + $table_name = $wpdb->prefix . 'mxchat_url_clicks';
76 +
77 + $charset_collate = $wpdb->get_charset_collate();
78 +
79 + $sql = "CREATE TABLE $table_name (
80 + id mediumint(9) NOT NULL AUTO_INCREMENT,
81 + session_id varchar(100) NOT NULL,
82 + clicked_url text NOT NULL,
83 + message_context text,
84 + click_timestamp datetime DEFAULT CURRENT_TIMESTAMP,
85 + user_ip varchar(45),
86 + user_agent text,
87 + PRIMARY KEY (id),
88 + KEY session_id (session_id),
89 + KEY click_timestamp (click_timestamp)
90 + ) $charset_collate;";
91 +
92 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
93 + dbDelta($sql);
94 +}
95 +
96 +/**
97 + * FIXED: Robust table creation and column management
98 + */
99 +function mxchat_create_chat_transcripts_table() {
100 + global $wpdb;
101 +
102 + $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
103 + $charset_collate = $wpdb->get_charset_collate();
104 +
105 + // Create table with ALL columns including user_name from the start
106 + $sql = "CREATE TABLE $table_name (
107 + id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
108 + user_id MEDIUMINT(9) DEFAULT 0,
109 + session_id VARCHAR(255) NOT NULL,
110 + role VARCHAR(255) NOT NULL,
111 + message TEXT NOT NULL,
112 + user_email VARCHAR(255) DEFAULT NULL,
113 + user_name VARCHAR(100) DEFAULT NULL,
114 + user_identifier VARCHAR(255) DEFAULT NULL,
115 + originating_page_url TEXT DEFAULT NULL,
116 + originating_page_title VARCHAR(500) DEFAULT NULL,
117 + timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
118 + PRIMARY KEY (id),
119 + KEY session_id (session_id),
120 + KEY user_email (user_email),
121 + KEY timestamp (timestamp)
122 + ) $charset_collate;";
123 +
124 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
125 + $result = dbDelta($sql);
126 +
127 + // Log the result for debugging
128 + if (empty($result)) {
129 + //error_log("MxChat: dbDelta returned empty result for chat transcripts table");
130 + } else {
131 + //error_log("MxChat: dbDelta result: " . print_r($result, true));
132 + }
133 +
134 + // IMPORTANT: Ensure all columns exist for existing installations
135 + mxchat_ensure_all_columns($table_name);
136 +}
137 +
138 +/**
139 + * Ensure all required columns exist (for upgrades)
140 + */
141 +function mxchat_ensure_all_columns($table_name) {
142 + global $wpdb;
143 +
144 + // First check if table exists
145 + $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
146 + if (!$table_exists) {
147 + //error_log("MxChat: Table $table_name does not exist, cannot add columns");
148 + return;
149 + }
150 +
151 + // Define all required columns and their types
152 + $required_columns = [
153 + 'user_identifier' => 'VARCHAR(255) DEFAULT NULL',
154 + 'user_email' => 'VARCHAR(255) DEFAULT NULL',
155 + 'user_name' => 'VARCHAR(100) DEFAULT NULL',
156 + 'originating_page_url' => 'TEXT DEFAULT NULL',
157 + 'originating_page_title' => 'VARCHAR(500) DEFAULT NULL',
158 + 'rag_context' => 'LONGTEXT DEFAULT NULL'
159 + ];
160 +
161 + // Get existing columns
162 + $existing_columns = $wpdb->get_results("SHOW COLUMNS FROM $table_name");
163 + if (empty($existing_columns)) {
164 + //error_log("MxChat: Could not get columns for table $table_name");
165 + return;
166 + }
167 +
168 + $existing_column_names = array_column($existing_columns, 'Field');
169 +
170 + // Add missing columns
171 + foreach ($required_columns as $column_name => $column_definition) {
172 + if (!in_array($column_name, $existing_column_names)) {
173 + $alter_sql = "ALTER TABLE $table_name ADD COLUMN $column_name $column_definition";
174 + $result = $wpdb->query($alter_sql);
175 +
176 + if ($result === false) {
177 + //error_log("MxChat: Failed to add column $column_name to $table_name. Error: " . $wpdb->last_error);
178 + } else {
179 + //error_log("MxChat: Successfully added column $column_name to $table_name");
180 + }
181 + }
182 + }
183 +}
184 +
185 +/**
186 + * Add role restriction column to knowledge base table
187 + */
188 +function mxchat_add_role_restriction_column() {
189 + global $wpdb;
190 + $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
191 +
192 + // Check if table exists first
193 + $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
194 + if (!$table_exists) {
195 + //error_log("MxChat: System prompt content table does not exist, cannot add role_restriction column");
196 + return;
197 + }
198 +
199 + // Check if column already exists
200 + $column_exists = $wpdb->get_results(
201 + $wpdb->prepare(
202 + "SHOW COLUMNS FROM {$table_name} LIKE %s",
203 + 'role_restriction'
204 + )
205 + );
206 +
207 + if (empty($column_exists)) {
208 + $alter_sql = "ALTER TABLE {$table_name} ADD COLUMN role_restriction VARCHAR(50) DEFAULT 'public' AFTER source_url";
209 + $result = $wpdb->query($alter_sql);
210 +
211 + if ($result === false) {
212 + //error_log("MxChat: Failed to add role_restriction column. Error: " . $wpdb->last_error);
213 + } else {
214 + //error_log("MxChat: Successfully added role_restriction column");
215 +
216 + // Set all existing records to 'public' (everyone can access)
217 + $update_result = $wpdb->query(
218 + "UPDATE {$table_name}
219 + SET role_restriction = 'public'
220 + WHERE role_restriction IS NULL OR role_restriction = ''"
221 + );
222 +
223 + if ($update_result !== false) {
224 + //error_log("MxChat: Updated {$update_result} existing records to public access");
225 + }
226 + }
227 + }
228 +}
229 +
230 +/**
231 + * Add enabled_bots column to intents table for multi-bot action filtering
232 + */
233 +function mxchat_add_enabled_bots_column() {
234 + global $wpdb;
235 + $table_name = $wpdb->prefix . 'mxchat_intents';
236 +
237 + // Check if table exists first
238 + $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
239 + if (!$table_exists) {
240 + //error_log("MxChat: Intents table does not exist, cannot add enabled_bots column");
241 + return;
242 + }
243 +
244 + // Check if column already exists
245 + $column_exists = $wpdb->get_results(
246 + $wpdb->prepare(
247 + "SHOW COLUMNS FROM {$table_name} LIKE %s",
248 + 'enabled_bots'
249 + )
250 + );
251 +
252 + if (empty($column_exists)) {
253 + $alter_sql = "ALTER TABLE {$table_name} ADD COLUMN enabled_bots LONGTEXT DEFAULT NULL AFTER enabled";
254 + $result = $wpdb->query($alter_sql);
255 +
256 + if ($result === false) {
257 + //error_log("MxChat: Failed to add enabled_bots column. Error: " . $wpdb->last_error);
258 + } else {
259 + //error_log("MxChat: Successfully added enabled_bots column");
260 +
261 + // Set all existing actions to work with 'default' bot for backward compatibility
262 + $default_bots = json_encode(['default']);
263 + $update_result = $wpdb->query(
264 + $wpdb->prepare(
265 + "UPDATE {$table_name}
266 + SET enabled_bots = %s
267 + WHERE enabled_bots IS NULL OR enabled_bots = ''",
268 + $default_bots
269 + )
270 + );
271 +
272 + if ($update_result !== false) {
273 + //error_log("MxChat: Updated {$update_result} existing actions to work with default bot");
274 + }
275 + }
276 + }
277 +}
278 +
279 +/**
280 + * Create Pinecone role restrictions table with multi-bot support
281 + */
282 +function mxchat_create_pinecone_roles_table() {
283 + global $wpdb;
284 +
285 + $table_name = $wpdb->prefix . 'mxchat_pinecone_roles';
286 + $charset_collate = $wpdb->get_charset_collate();
287 +
288 + $sql = "CREATE TABLE $table_name (
289 + id mediumint(9) NOT NULL AUTO_INCREMENT,
290 + vector_id varchar(255) NOT NULL,
291 + bot_id varchar(50) NOT NULL DEFAULT 'default',
292 + source_url text,
293 + role_restriction varchar(50) DEFAULT 'public',
294 + updated_at timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
295 + PRIMARY KEY (id),
296 + UNIQUE KEY vector_bot (vector_id, bot_id),
297 + KEY role_restriction (role_restriction),
298 + KEY bot_id (bot_id)
299 + ) $charset_collate;";
300 +
301 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
302 + dbDelta($sql);
303 +}
304 +
305 +/**
306 + * Add bot_id column to mxchat_pinecone_roles table for multi-bot support
307 + * This migration runs once to update existing installations
308 + */
309 +function mxchat_migrate_pinecone_roles_add_bot_id() {
310 + global $wpdb;
311 +
312 + // Check if migration already ran
313 + $migration_version = get_option('mxchat_pinecone_roles_migration_version', '0');
314 + if (version_compare($migration_version, '2.5.2', '>=')) {
315 + return; // Already migrated
316 + }
317 +
318 + $table_name = $wpdb->prefix . 'mxchat_pinecone_roles';
319 +
320 + // Check if table exists
321 + if ($wpdb->get_var("SHOW TABLES LIKE '{$table_name}'") != $table_name) {
322 + return; // Table doesn't exist yet
323 + }
324 +
325 + // Check if bot_id column already exists
326 + $column_exists = $wpdb->get_results("SHOW COLUMNS FROM {$table_name} LIKE 'bot_id'");
327 +
328 + if (empty($column_exists)) {
329 + // Add bot_id column
330 + $wpdb->query("ALTER TABLE {$table_name} ADD COLUMN bot_id VARCHAR(50) NOT NULL DEFAULT 'default' AFTER vector_id");
331 +
332 + // Update the unique key to include bot_id
333 + $wpdb->query("ALTER TABLE {$table_name} DROP INDEX vector_id");
334 + $wpdb->query("ALTER TABLE {$table_name} ADD UNIQUE KEY vector_bot (vector_id, bot_id)");
335 +
336 + // Add index for bot_id
337 + $wpdb->query("ALTER TABLE {$table_name} ADD KEY bot_id (bot_id)");
338 +
339 + error_log('MxChat: Successfully added bot_id column to mxchat_pinecone_roles table');
340 + }
341 +
342 + // Mark migration as complete
343 + update_option('mxchat_pinecone_roles_migration_version', '2.5.2');
344 +}
345 +
346 +/**
347 + * 2.5.6: Add content_type column to mxchat_system_prompt_content table
348 + * Enables filtering knowledge base by content type (posts, pages, PDFs, etc.)
349 + */
350 +function mxchat_migrate_add_content_type_column() {
351 + global $wpdb;
352 +
353 + // Check if migration already ran
354 + $migration_version = get_option('mxchat_content_type_migration_version', '0');
355 + if (version_compare($migration_version, '2.5.6', '>=')) {
356 + return;
357 + }
358 +
359 + $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
360 +
361 + // Check if table exists
362 + if ($wpdb->get_var("SHOW TABLES LIKE '{$table_name}'") != $table_name) {
363 + return;
364 + }
365 +
366 + // Check if content_type column already exists
367 + $column_exists = $wpdb->get_results("SHOW COLUMNS FROM {$table_name} LIKE 'content_type'");
368 +
369 + if (empty($column_exists)) {
370 + // Add content_type column with default value 'content' for backwards compatibility
371 + $wpdb->query("ALTER TABLE {$table_name} ADD COLUMN content_type VARCHAR(50) DEFAULT 'content' AFTER role_restriction");
372 +
373 + // Add index for better query performance
374 + $wpdb->query("ALTER TABLE {$table_name} ADD KEY content_type (content_type)");
375 +
376 + error_log('MxChat: Successfully added content_type column to mxchat_system_prompt_content table');
377 + }
378 +
379 + // Mark migration as complete
380 + update_option('mxchat_content_type_migration_version', '2.5.6');
381 +}
382 +
383 +/**
384 + * 2.5.2: Create queue processing tables for reliable background processing
385 + */
386 +function mxchat_create_queue_tables() {
387 + global $wpdb;
388 + $charset_collate = $wpdb->get_charset_collate();
389 +
390 + // Main queue table
391 + $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
392 + $sql_queue = "CREATE TABLE $queue_table (
393 + id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
394 + queue_id varchar(64) NOT NULL,
395 + item_type varchar(20) NOT NULL,
396 + item_data longtext NOT NULL,
397 + status varchar(20) NOT NULL DEFAULT 'pending',
398 + bot_id varchar(50) NOT NULL DEFAULT 'default',
399 + priority int(11) NOT NULL DEFAULT 0,
400 + attempts int(11) NOT NULL DEFAULT 0,
401 + max_attempts int(11) NOT NULL DEFAULT 3,
402 + error_message text DEFAULT NULL,
403 + created_at datetime NOT NULL,
404 + started_at datetime DEFAULT NULL,
405 + completed_at datetime DEFAULT NULL,
406 + PRIMARY KEY (id),
407 + KEY queue_id (queue_id),
408 + KEY status (status),
409 + KEY item_type (item_type),
410 + KEY priority (priority)
411 + ) $charset_collate;";
412 +
413 + // Queue metadata table
414 + $meta_table = $wpdb->prefix . 'mxchat_queue_meta';
415 + $sql_meta = "CREATE TABLE $meta_table (
416 + id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
417 + queue_id varchar(64) NOT NULL,
418 + meta_key varchar(255) NOT NULL,
419 + meta_value longtext,
420 + PRIMARY KEY (id),
421 + KEY queue_id (queue_id),
422 + KEY meta_key (meta_key)
423 + ) $charset_collate;";
424 +
425 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
426 + dbDelta($sql_queue);
427 + dbDelta($sql_meta);
428 +
429 + //error_log("MxChat: Queue tables created/updated successfully");
430 +}
431 +
432 +/**
433 + * Create transcript translations table for persisting translations
434 + */
435 +function mxchat_create_translations_table() {
436 + global $wpdb;
437 + $charset_collate = $wpdb->get_charset_collate();
438 +
439 + $table_name = $wpdb->prefix . 'mxchat_transcript_translations';
440 + $sql = "CREATE TABLE $table_name (
441 + id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
442 + session_id varchar(255) NOT NULL,
443 + language_code varchar(10) NOT NULL,
444 + translations longtext NOT NULL,
445 + created_at datetime NOT NULL,
446 + updated_at datetime NOT NULL,
447 + PRIMARY KEY (id),
448 + UNIQUE KEY session_lang (session_id, language_code),
449 + KEY session_id (session_id)
450 + ) $charset_collate;";
451 +
452 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
453 + dbDelta($sql);
454 +}
455 +
456 +/**
457 + * 2.5.2: Fix URL column size to support long URLs (especially with UTF-8 encoding)
458 + * This fixes "url, source_url. The supplied values may be too long" errors
459 + */
460 +function mxchat_fix_url_column_size() {
461 + global $wpdb;
462 + $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
463 +
464 + // Check if table exists
465 + $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
466 + if (!$table_exists) {
467 + return;
468 + }
469 +
470 + // Change url and source_url from VARCHAR to TEXT to handle long URLs
471 + // This is especially important for URLs with UTF-8 encoded characters (Hebrew, Arabic, etc.)
472 + $wpdb->query("ALTER TABLE {$table_name} MODIFY COLUMN url TEXT");
473 + $wpdb->query("ALTER TABLE {$table_name} MODIFY COLUMN source_url TEXT");
474 +
475 + //error_log("MxChat: Successfully updated url and source_url columns to TEXT type for long URL support");
476 +}
477 +
478 +/**
479 + * Migrate deprecated AI models to their replacements
480 + * Version 2.5.1: Migrate Claude 3.5 Sonnet (deprecated) to Claude 3.7 Sonnet
481 + */
482 +function mxchat_migrate_deprecated_models() {
483 + $options = get_option('mxchat_options', array());
484 +
485 + // Check if model is set and is the deprecated Claude 3.5 Sonnet
486 + if (isset($options['model']) && $options['model'] === 'claude-3-5-sonnet-20241022') {
487 + // Update to Claude 3.7 Sonnet (the replacement model)
488 + $options['model'] = 'claude-3-7-sonnet-20250219';
489 + update_option('mxchat_options', $options);
490 +
491 + // Set a flag to show admin notice
492 + update_option('mxchat_model_migrated_notice', true);
493 +
494 + //error_log('MxChat: Migrated deprecated Claude 3.5 Sonnet to Claude 3.7 Sonnet');
495 + }
496 +}
497 +
498 +/**
499 + * Show admin notice after model migration
500 + */
501 +function mxchat_show_migration_notice() {
502 + if (get_option('mxchat_model_migrated_notice')) {
503 + ?>
504 + <div class="notice notice-info is-dismissible">
505 + <p>
506 + <strong><?php esc_html_e('MxChat Model Updated', 'mxchat'); ?></strong><br>
507 + <?php esc_html_e('Your chatbot model has been automatically updated from Claude 3.5 Sonnet to Claude 3.7 Sonnet due to the deprecation of the previous model by Anthropic. Claude 3.7 Sonnet offers improved performance and capabilities.', 'mxchat'); ?>
508 + </p>
509 + </div>
510 + <?php
511 + delete_option('mxchat_model_migrated_notice');
512 + }
513 +}
514 +
515 +function mxchat_activate() {
516 + global $wpdb;
517 + $charset_collate = $wpdb->get_charset_collate();
518 +
519 + //error_log("MxChat: Running activation function");
520 +
521 + // Create chat transcripts table with improved function
522 + mxchat_create_chat_transcripts_table();
523 +
524 + // System Prompt Content Table - UPDATED: Use TEXT for url and source_url columns
525 + $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
526 + $sql_system_prompt = "CREATE TABLE $system_prompt_table (
527 + id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
528 + url TEXT NOT NULL,
529 + article_content LONGTEXT NOT NULL,
530 + embedding_vector LONGTEXT,
531 + source_url TEXT DEFAULT NULL,
532 + role_restriction VARCHAR(50) DEFAULT 'public',
533 + content_type VARCHAR(50) DEFAULT 'content',
534 + timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
535 + PRIMARY KEY (id),
536 + KEY content_type (content_type)
537 + ) $charset_collate;";
538 +
539 + // Intents Table - NOW INCLUDES enabled_bots column from the start
540 + $intents_table = $wpdb->prefix . 'mxchat_intents';
541 + $sql_intents_table = "CREATE TABLE $intents_table (
542 + id BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
543 + intent_label VARCHAR(255) NOT NULL,
544 + phrases TEXT NOT NULL,
545 + embedding_vector LONGTEXT NOT NULL,
546 + callback_function VARCHAR(255) NOT NULL,
547 + similarity_threshold FLOAT DEFAULT 0.85,
548 + enabled TINYINT(1) NOT NULL DEFAULT 1,
549 + enabled_bots LONGTEXT DEFAULT NULL,
550 + PRIMARY KEY (id)
551 + ) $charset_collate;";
552 +
553 + require_once ABSPATH . 'wp-admin/includes/upgrade.php';
554 +
555 + // Create other tables
556 + dbDelta($sql_system_prompt);
557 + dbDelta($sql_intents_table);
558 +
559 + // Create URL click tracking table
560 + mxchat_create_url_clicks_table();
561 +
562 + // Create Pinecone roles table
563 + mxchat_create_pinecone_roles_table();
564 +
565 + // NEW 2.5.2: Create queue processing tables
566 + mxchat_create_queue_tables();
567 +
568 + // Create transcript translations table
569 + mxchat_create_translations_table();
570 +
571 + // Ensure additional columns in system prompt table
572 + $existing_system_columns = $wpdb->get_results("SHOW COLUMNS FROM $system_prompt_table");
573 + if (!empty($existing_system_columns)) {
574 + $existing_system_column_names = array_column($existing_system_columns, 'Field');
575 +
576 + if (!in_array('embedding_vector', $existing_system_column_names)) {
577 + $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN embedding_vector LONGTEXT");
578 + }
579 + if (!in_array('source_url', $existing_system_column_names)) {
580 + $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN source_url TEXT DEFAULT NULL");
581 + }
582 + if (!in_array('role_restriction', $existing_system_column_names)) {
583 + $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN role_restriction VARCHAR(50) DEFAULT 'public' AFTER source_url");
584 + }
585 + }
586 +
587 + // Set default thresholds for existing intents
588 + $wpdb->query("UPDATE {$intents_table} SET similarity_threshold = 0.85 WHERE similarity_threshold IS NULL");
589 +
590 + // Ensure enabled column exists in intents table
591 + $existing_intent_columns = $wpdb->get_results("SHOW COLUMNS FROM $intents_table");
592 + if (!empty($existing_intent_columns)) {
593 + $existing_intent_column_names = array_column($existing_intent_columns, 'Field');
594 +
595 + if (!in_array('enabled', $existing_intent_column_names)) {
596 + $wpdb->query("ALTER TABLE $intents_table ADD COLUMN enabled TINYINT(1) NOT NULL DEFAULT 1");
597 + }
598 +
599 + // Ensure enabled_bots column exists for existing installations
600 + if (!in_array('enabled_bots', $existing_intent_column_names)) {
601 + $wpdb->query("ALTER TABLE $intents_table ADD COLUMN enabled_bots LONGTEXT DEFAULT NULL AFTER enabled");
602 +
603 + // Set existing actions to work with default bot
604 + $default_bots = json_encode(['default']);
605 + $wpdb->query($wpdb->prepare(
606 + "UPDATE {$intents_table} SET enabled_bots = %s WHERE enabled_bots IS NULL",
607 + $default_bots
608 + ));
609 + }
610 + }
611 +
612 + // Run migration for existing installations
613 + mxchat_migrate_pinecone_roles_add_bot_id();
614 +
615 + // Setup cron jobs
616 + mxchat_setup_cron_jobs();
617 +
618 + // Update version
619 + update_option('mxchat_plugin_version', MXCHAT_VERSION);
620 +
621 + //error_log("MxChat: Activation function completed");
622 +}
623 +
624 +/**
625 + * Setup cron jobs on plugin activation
626 + */
627 +function mxchat_setup_cron_jobs() {
628 + // Clear any existing cron jobs first
629 + wp_clear_scheduled_hook('mxchat_reset_rate_limits');
630 +
631 + // Check if WordPress cron is disabled
632 + if (defined('DISABLE_WP_CRON') && DISABLE_WP_CRON) {
633 + // Set flag to use fallback system
634 + update_option('mxchat_use_fallback_rate_limits', true);
635 + update_option('mxchat_next_rate_limit_check', time() + 3600);
636 + return;
637 + }
638 +
639 + // Schedule the rate limit reset cron job
640 + $result = wp_schedule_event(time() + 300, 'hourly', 'mxchat_reset_rate_limits');
641 +
642 + if ($result === false) {
643 + // Fallback if scheduling fails
644 + update_option('mxchat_use_fallback_rate_limits', true);
645 + update_option('mxchat_next_rate_limit_check', time() + 3600);
646 + } else {
647 + // Clear fallback flags if cron scheduling succeeded
648 + delete_option('mxchat_use_fallback_rate_limits');
649 + }
650 +
651 + // Schedule transcript cleanup if configured
652 + $transcript_options = get_option('mxchat_transcripts_options', array());
653 + $cleanup_interval = isset($transcript_options['mxchat_auto_delete_transcripts']) ? $transcript_options['mxchat_auto_delete_transcripts'] : 'never';
654 +
655 + if ($cleanup_interval !== 'never') {
656 + // Check if not already scheduled
657 + if (!wp_next_scheduled('mxchat_cleanup_old_transcripts')) {
658 + // Schedule to run daily at 3 AM
659 + $next_run = strtotime('tomorrow 3:00 AM');
660 + wp_schedule_event($next_run, 'daily', 'mxchat_cleanup_old_transcripts');
661 + }
662 + }
663 +}
664 +
665 +/**
666 + * Clean up on plugin deactivation
667 + */
668 +function mxchat_deactivate() {
669 + // Clear scheduled cron jobs
670 + wp_clear_scheduled_hook('mxchat_reset_rate_limits');
671 + wp_clear_scheduled_hook('mxchat_cleanup_old_transcripts');
672 + wp_clear_scheduled_hook('mxchat_send_delayed_transcript');
673 +
674 + // Clear fallback options
675 + delete_option('mxchat_use_fallback_rate_limits');
676 + delete_option('mxchat_next_rate_limit_check');
677 + delete_option('mxchat_fallback_check_interval');
678 +
679 + // NOTE: We do NOT delete queue tables on deactivation
680 + // This preserves data if user accidentally deactivates the plugin
681 +}
682 +
683 +/**
684 + * Check if fallback rate limit cleanup is needed
685 + */
686 +function mxchat_check_fallback_rate_limits() {
687 + $use_fallback = get_option('mxchat_use_fallback_rate_limits', false);
688 +
689 + if (!$use_fallback) {
690 + return;
691 + }
692 +
693 + $next_check = get_option('mxchat_next_rate_limit_check', 0);
694 +
695 + if (time() >= $next_check) {
696 + // Only run reset if the MxChat_Integrator class exists
697 + if (class_exists('MxChat_Integrator')) {
698 + $integrator = new MxChat_Integrator();
699 + if (method_exists($integrator, 'mxchat_reset_rate_limits')) {
700 + $integrator->mxchat_reset_rate_limits();
701 + update_option('mxchat_next_rate_limit_check', time() + 3600);
702 + }
703 + }
704 + }
705 +}
706 +
707 +/**
708 + * Robust update checking with role restriction migration, model deprecation, and queue tables
709 + * CRITICAL: This runs on EVERY page load to ensure tables exist
710 + */
711 +function mxchat_check_for_update() {
712 + global $wpdb;
713 +
714 + try {
715 + $current_version = get_option('mxchat_plugin_version', '0.0.0');
716 + $plugin_version = MXCHAT_VERSION;
717 +
718 + // Always ensure critical tables exist (even if version matches)
719 + // This handles manual table deletion or fresh installs
720 + $chat_table = $wpdb->prefix . 'mxchat_chat_transcripts';
721 + $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
722 +
723 + $chat_exists = $wpdb->get_var("SHOW TABLES LIKE '$chat_table'") === $chat_table;
724 + $queue_exists = $wpdb->get_var("SHOW TABLES LIKE '$queue_table'") === $queue_table;
725 +
726 + if (!$chat_exists || !$queue_exists) {
727 + //error_log("MxChat: Critical tables missing, running activation");
728 + mxchat_activate();
729 + }
730 +
731 + // Version-specific migrations
732 + if ($current_version !== $plugin_version) {
733 + //error_log("MxChat: Version change detected: $current_version -> $plugin_version");
734 +
735 + // Run live agent update BEFORE updating the stored version
736 + mxchat_handle_live_agent_update();
737 +
738 + // Run theme migration notice for 3.0.1 (AI theme CSS structure changes)
739 + mxchat_handle_theme_migration_notice();
740 +
741 + // Run role restriction migration for 2.4.1
742 + if (version_compare($current_version, '2.4.1', '<')) {
743 + mxchat_add_role_restriction_column();
744 + }
745 +
746 + // Run enabled_bots column migration for 2.4.4
747 + if (version_compare($current_version, '2.4.4', '<')) {
748 + mxchat_add_enabled_bots_column();
749 + }
750 +
751 + // Run model migration for 2.5.1 (Claude deprecation)
752 + if (version_compare($current_version, '2.5.1', '<')) {
753 + mxchat_migrate_deprecated_models();
754 + }
755 +
756 + // 2.5.2: Ensure queue tables exist and fix URL column sizes for all users upgrading to 2.5.2
757 + if (version_compare($current_version, '2.5.2', '<')) {
758 + mxchat_create_queue_tables();
759 + mxchat_fix_url_column_size(); // NEW: Fix URL column size for long URLs
760 + //error_log("MxChat: Queue tables created and URL columns updated for upgrade to 2.5.2");
761 + }
762 +
763 + // 2.6.0: Ensure rag_context column exists for retrieved documents feature
764 + if (version_compare($current_version, '2.6.0', '<')) {
765 + $chat_table = $wpdb->prefix . 'mxchat_chat_transcripts';
766 + mxchat_ensure_all_columns($chat_table);
767 + //error_log("MxChat: rag_context column migration for 2.6.0");
768 + }
769 +
770 + // Run full activation to ensure everything is up to date
771 + mxchat_activate();
772 +
773 + // Run migration functions
774 + mxchat_migrate_live_agent_status();
775 +
776 + // Add the cleanup function for version 2.1.8
777 + if (version_compare($current_version, '2.1.8', '<')) {
778 + $deleted = mxchat_cleanup_orphaned_chat_history();
779 + }
780 +
781 + // Update version LAST
782 + update_option('mxchat_plugin_version', $plugin_version);
783 +
784 + //error_log("MxChat: Updated from version $current_version to $plugin_version");
785 + }
786 +
787 + } catch (Exception $e) {
788 + //error_log('MxChat update error: ' . $e->getMessage());
789 + // Don't update version if there was an error
790 + }
791 +}
792 +
793 +/**
794 + * Ensure tables exist on every admin load for fresh installations
795 + * This is a safety net for cases where activation hook doesn't fire
796 + */
797 +function mxchat_ensure_tables_exist() {
798 + global $wpdb;
799 +
800 + // Only run for admin users to avoid performance impact
801 + if (!current_user_can('administrator')) {
802 + return;
803 + }
804 +
805 + // Check if we've already verified tables in this session
806 + static $tables_checked = false;
807 + if ($tables_checked) {
808 + return;
809 + }
810 + $tables_checked = true;
811 +
812 + $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
813 + $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
814 +
815 + $chat_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
816 + $queue_exists = $wpdb->get_var("SHOW TABLES LIKE '$queue_table'") === $queue_table;
817 +
818 + if (!$chat_exists || !$queue_exists) {
819 + //error_log("MxChat: Tables missing on admin load, running activation");
820 + mxchat_activate();
821 + }
822 +}
823 +
824 +/**
825 + * Clean up orphaned chat history options from the wp_options table
826 + * @return int Number of options deleted
827 + */
828 +function mxchat_cleanup_orphaned_chat_history() {
829 + global $wpdb;
830 + $count = 0;
831 +
832 + // Get all option keys that match our pattern
833 + $history_options = $wpdb->get_results(
834 + "SELECT option_name FROM {$wpdb->options}
835 + WHERE option_name LIKE 'mxchat_history_%'"
836 + );
837 +
838 + if (!empty($history_options)) {
839 + foreach ($history_options as $option) {
840 + // Extract the session ID from the option name
841 + $session_id = str_replace('mxchat_history_', '', $option->option_name);
842 +
843 + // Check if this session still exists in the custom table
844 + $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
845 + $exists = $wpdb->get_var(
846 + $wpdb->prepare(
847 + "SELECT COUNT(*) FROM {$table_name} WHERE session_id = %s",
848 + $session_id
849 + )
850 + );
851 +
852 + // If session doesn't exist in the main table, delete the option
853 + if ($exists == 0) {
854 + delete_option($option->option_name);
855 + // Also delete related metadata
856 + delete_option("mxchat_email_{$session_id}");
857 + delete_option("mxchat_name_{$session_id}");
858 + delete_option("mxchat_agent_name_{$session_id}");
859 + $count++;
860 + }
861 + }
862 + }
863 +
864 + return $count;
865 +}
866 +
867 +function mxchat_migrate_live_agent_status() {
868 + $options = get_option('mxchat_options', []);
869 +
870 + // Check if live_agent_status exists
871 + if (isset($options['live_agent_status'])) {
872 + $current_status = $options['live_agent_status'];
873 + $needs_update = false;
874 +
875 + // Convert to new format if needed
876 + if ($current_status === 'online') {
877 + $options['live_agent_status'] = 'on';
878 + $needs_update = true;
879 + } else if ($current_status === 'offline') {
880 + $options['live_agent_status'] = 'off';
881 + $needs_update = true;
882 + } else if (!in_array($current_status, ['on', 'off'])) {
883 + // Default to off for any unexpected values
884 + $options['live_agent_status'] = 'off';
885 + $needs_update = true;
886 + }
887 +
888 + // Only update if needed
889 + if ($needs_update) {
890 + update_option('mxchat_options', $options);
891 + }
892 + } else {
893 + // If status doesn't exist, set default to off
894 + $options['live_agent_status'] = 'off';
895 + update_option('mxchat_options', $options);
896 + }
897 +}
898 +
899 +function mxchat_handle_live_agent_update() {
900 + // Get the CURRENT stored version (before it gets updated)
901 + $current_version = get_option('mxchat_plugin_version', '0.0.0');
902 + $new_version = '2.2.2';
903 +
904 + // Only run this once for the update to 2.2.2
905 + $update_handled = get_option('mxchat_live_agent_update_2_2_2_handled', false);
906 +
907 + // Check if we're upgrading TO 2.2.2 and haven't handled this yet
908 + if (version_compare($current_version, $new_version, '<') && !$update_handled) {
909 + $options = get_option('mxchat_options', array());
910 +
911 + // Check if live agent was previously enabled
912 + if (isset($options['live_agent_status']) && $options['live_agent_status'] === 'on') {
913 + // Disable live agent
914 + $options['live_agent_status'] = 'off';
915 + update_option('mxchat_options', $options);
916 +
917 + // Set flag to show the notification banner
918 + update_option('mxchat_show_live_agent_disabled_notice', true);
919 + }
920 +
921 + // Mark this update as handled
922 + update_option('mxchat_live_agent_update_2_2_2_handled', true);
923 + }
924 +}
925 +
926 +/**
927 + * Handle theme migration notice for version 3.0.1
928 + * Shows a dismissible notice to Pro users about migrating AI-generated themes
929 + */
930 +function mxchat_handle_theme_migration_notice() {
931 + // Get the CURRENT stored version (before it gets updated)
932 + $current_version = get_option('mxchat_plugin_version', '0.0.0');
933 + $target_version = '3.0.1';
934 +
935 + // Only run this once for the update to 3.0.1
936 + $update_handled = get_option('mxchat_theme_migration_update_3_0_1_handled', false);
937 +
938 + // Check if we're upgrading TO 3.0.1 and haven't handled this yet
939 + if (version_compare($current_version, $target_version, '<') && !$update_handled) {
940 + // Check if Pro is activated - only show to Pro users
941 + $license_status = get_option('mxchat_license_status', 'inactive');
942 + $is_pro = ($license_status === 'active' || $license_status === esc_html__('active', 'mxchat'));
943 +
944 + if ($is_pro) {
945 + // Set flag to show the theme migration notification banner
946 + update_option('mxchat_show_theme_migration_notice', true);
947 + }
948 +
949 + // Mark this update as handled (whether Pro or not)
950 + update_option('mxchat_theme_migration_update_3_0_1_handled', true);
951 + }
952 +}
953 +
954 +// Initialize plugin safely
955 +function mxchat_init() {
956 + // Include all class files first
957 + mxchat_include_classes();
958 +
959 + // Run update check (this also ensures tables exist)
960 + mxchat_check_for_update();
961 +
962 + // CRITICAL: Ensure tables exist on admin pages (safety net)
963 + add_action('admin_init', 'mxchat_ensure_tables_exist', 1);
964 +
965 + // Add fallback rate limit check
966 + add_action('init', 'mxchat_check_fallback_rate_limits', 5);
967 +
968 + // Add migration notice hook
969 + add_action('admin_notices', 'mxchat_show_migration_notice');
970 +
971 + // Initialize classes with error handling
972 + try {
973 + // Initialize admin classes
974 + if (is_admin()) {
975 + if (class_exists('MxChat_Knowledge_Manager')) {
976 + $mxchat_knowledge_manager = new MxChat_Knowledge_Manager();
977 +
978 + if (class_exists('MxChat_Admin')) {
979 + $mxchat_admin = new MxChat_Admin($mxchat_knowledge_manager);
980 + }
981 + }
982 +
983 + // Initialize meta box class
984 + if (class_exists('MxChat_Meta_Box')) {
985 + new MxChat_Meta_Box();
986 + }
987 + }
988 +
989 + // Initialize public classes
990 + if (class_exists('MxChat_Public')) {
991 + $mxchat_public = new MxChat_Public();
992 + }
993 +
994 + if (class_exists('MxChat_Integrator')) {
995 + global $mxchat_integrator;
996 + $mxchat_integrator = new MxChat_Integrator();
997 + }
998 +
999 + } catch (Exception $e) {
1000 + //error_log('MxChat initialization error: ' . $e->getMessage());
1001 +
1002 + // Show admin notice if there's an error
1003 + if (is_admin()) {
1004 + add_action('admin_notices', function() use ($e) {
1005 + echo '<div class="notice notice-error"><p>';
1006 + echo '<strong>MxChat Error:</strong> Plugin initialization failed. ';
1007 + echo 'Please check error logs or contact support. Error: ' . esc_html($e->getMessage());
1008 + echo '</p></div>';
1009 + });
1010 + }
1011 + }
1012 +}
1013 +
1014 +// Run initialization on plugins_loaded
1015 +add_action('plugins_loaded', 'mxchat_init');
1016 +
1017 +// Run migration check on admin init (for auto-updates without reactivation)
1018 +add_action('admin_init', 'mxchat_check_and_run_migrations');
1019 +
1020 +/**
1021 + * Check and run migrations on admin init
1022 + * This ensures migrations run even when plugin is auto-updated
1023 + */
1024 +function mxchat_check_and_run_migrations() {
1025 + // Only run in admin and not on every request
1026 + static $checked = false;
1027 + if ($checked) {
1028 + return;
1029 + }
1030 + $checked = true;
1031 +
1032 + mxchat_migrate_pinecone_roles_add_bot_id();
1033 + mxchat_migrate_add_content_type_column();
1034 + mxchat_migrate_add_translations_table();
1035 +}
1036 +
1037 +/**
1038 + * Migration: Create transcript translations table (v3.0.4)
1039 + * For users upgrading from versions before 3.0.4
1040 + */
1041 +function mxchat_migrate_add_translations_table() {
1042 + $migration_key = 'mxchat_translations_table_created';
1043 +
1044 + // Check if migration already ran
1045 + if (get_option($migration_key)) {
1046 + return;
1047 + }
1048 +
1049 + // Create the translations table
1050 + mxchat_create_translations_table();
1051 +
1052 + // Mark migration as complete
1053 + update_option($migration_key, '3.0.4');
1054 +}
1055 +
1056 +// Register activation hook
1057 +register_activation_hook(__FILE__, 'mxchat_activate');
1058 +
1059 +// Add cron schedule
1060 +add_filter('cron_schedules', function($schedules) {
1061 + $schedules['one_minute'] = array(
1062 + 'interval' => 60,
1063 + 'display' => 'Every Minute'
1064 + );
1065 + return $schedules;
1066 +});
1067 +
1068 +// Register deactivation hook
1069 +register_deactivation_hook(__FILE__, 'mxchat_deactivate');