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MxChat – AI Chatbot & Content Generation for WordPress / 3.1.3
MxChat – AI Chatbot & Content Generation for WordPress v3.1.3
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← All changes | mxchat-basic.php +1395 -176 2.0.5 → 3.1.3 View file →
@@ -1,176 +1,1395 @@
1 -<?php
2 -/**
3 - * Plugin Name: MxChat
4 - * Description: AI chatbot for WordPress with OpenAI, Claude, xAI, DeepSeek, live agent, PDF uploads, WooCommerce, and training on website data.
5 - * Version: 2.0.5
6 - * Author: MxChat
7 - * Author URI: https://mxchat.ai
8 - * License: GPLv2 or later
9 - * License URI: https://www.gnu.org/licenses/gpl-2.0.html
10 - * Text Domain: mxchat
11 - * Domain Path: /languages
12 - */
13 -
14 -if (!defined('ABSPATH')) {
15 - exit; // Exit if accessed directly.
16 -}
17 -
18 -
19 -function mxchat_load_textdomain() {
20 - load_plugin_textdomain('mxchat', false, dirname(plugin_basename(__FILE__)) . '/languages');
21 -}
22 -add_action('plugins_loaded', 'mxchat_load_textdomain');
23 -
24 -// Include classes
25 -require_once plugin_dir_path(__FILE__) . 'includes/class-mxchat-integrator.php';
26 -require_once plugin_dir_path(__FILE__) . 'includes/class-mxchat-admin.php';
27 -require_once plugin_dir_path(__FILE__) . 'includes/class-mxchat-public.php';
28 -require_once plugin_dir_path(__FILE__) . 'includes/class-mxchat-utils.php';
29 -require_once plugin_dir_path(__FILE__) . 'includes/class-mxchat-user.php';
30 -require_once plugin_dir_path(__FILE__) . 'includes/class-mxchat-woocommerce.php';
31 -require_once plugin_dir_path(__FILE__) . 'includes/pdf-parser/alt_autoload.php';
32 -require_once plugin_dir_path(__FILE__) . 'includes/class-mxchat-word-handler.php';
33 -
34 -function mxchat_activate() {
35 - global $wpdb;
36 - $charset_collate = $wpdb->get_charset_collate();
37 -
38 - // Chat Transcripts Table
39 - $chat_transcripts_table = $wpdb->prefix . 'mxchat_chat_transcripts';
40 - $sql_chat_transcripts = "CREATE TABLE $chat_transcripts_table (
41 - id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
42 - user_id MEDIUMINT(9) DEFAULT 0,
43 - session_id VARCHAR(255) NOT NULL,
44 - role VARCHAR(255) NOT NULL,
45 - message TEXT NOT NULL,
46 - user_email VARCHAR(255) DEFAULT NULL,
47 - timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
48 - PRIMARY KEY (id)
49 - ) $charset_collate;";
50 -
51 - // System Prompt Content Table
52 - $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
53 - $sql_system_prompt = "CREATE TABLE $system_prompt_table (
54 - id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
55 - url VARCHAR(255) NOT NULL,
56 - article_content LONGTEXT NOT NULL,
57 - embedding_vector LONGTEXT,
58 - source_url VARCHAR(255) DEFAULT NULL,
59 - timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
60 - PRIMARY KEY (id)
61 - ) $charset_collate;";
62 -
63 - // Intents Table
64 - $intents_table = $wpdb->prefix . 'mxchat_intents';
65 - $sql_intents_table = "CREATE TABLE $intents_table (
66 - id BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
67 - intent_label VARCHAR(255) NOT NULL,
68 - phrases TEXT NOT NULL,
69 - embedding_vector LONGTEXT NOT NULL,
70 - callback_function VARCHAR(255) NOT NULL,
71 - similarity_threshold FLOAT DEFAULT 0.85,
72 - PRIMARY KEY (id)
73 - ) $charset_collate;";
74 -
75 - require_once ABSPATH . 'wp-admin/includes/upgrade.php';
76 -
77 - // Create or update tables
78 - dbDelta($sql_chat_transcripts);
79 - dbDelta($sql_system_prompt);
80 - dbDelta($sql_intents_table);
81 -
82 - // Ensure additional columns in `mxchat_chat_transcripts`
83 - mxchat_add_missing_columns($chat_transcripts_table, 'user_identifier', 'VARCHAR(255)');
84 - mxchat_add_missing_columns($chat_transcripts_table, 'user_email', 'VARCHAR(255) DEFAULT NULL');
85 -
86 - // Ensure additional columns in `mxchat_system_prompt_content`
87 - mxchat_add_missing_columns($system_prompt_table, 'embedding_vector', 'LONGTEXT');
88 - mxchat_add_missing_columns($system_prompt_table, 'source_url', 'VARCHAR(255) DEFAULT NULL');
89 -
90 - // Set default thresholds for existing intents
91 - $wpdb->query("UPDATE {$intents_table} SET similarity_threshold = 0.85 WHERE similarity_threshold IS NULL");
92 -
93 - // Update plugin version in the database
94 - update_option('mxchat_plugin_version', '2.0.5');
95 -}
96 -
97 -
98 -function mxchat_add_missing_columns($table, $column_name, $column_type) {
99 - global $wpdb;
100 - $column_exists = $wpdb->get_results($wpdb->prepare("SHOW COLUMNS FROM $table LIKE %s", $column_name));
101 - if (empty($column_exists)) {
102 - $wpdb->query("ALTER TABLE $table ADD COLUMN $column_name $column_type");
103 - }
104 -}
105 -
106 -function mxchat_check_for_update() {
107 - $current_version = get_option('mxchat_plugin_version');
108 - $plugin_version = '2.0.5'; // Update with your latest version
109 -
110 - if ($current_version !== $plugin_version) {
111 - mxchat_activate(); // Run the activation script to apply schema changes
112 - mxchat_migrate_live_agent_status(); // Add migration for live agent status
113 - update_option('mxchat_plugin_version', $plugin_version); // Update the version
114 - }
115 -}
116 -
117 -function mxchat_migrate_live_agent_status() {
118 - $options = get_option('mxchat_options', []);
119 -
120 - // Check if live_agent_status exists
121 - if (isset($options['live_agent_status'])) {
122 - $current_status = $options['live_agent_status'];
123 - $needs_update = false;
124 -
125 - // Convert to new format if needed
126 - if ($current_status === 'online') {
127 - $options['live_agent_status'] = 'on';
128 - $needs_update = true;
129 - } else if ($current_status === 'offline') {
130 - $options['live_agent_status'] = 'off';
131 - $needs_update = true;
132 - } else if (!in_array($current_status, ['on', 'off'])) {
133 - // Default to off for any unexpected values
134 - $options['live_agent_status'] = 'off';
135 - $needs_update = true;
136 - }
137 -
138 - // Only update if needed
139 - if ($needs_update) {
140 - update_option('mxchat_options', $options);
141 - }
142 - } else {
143 - // If status doesn't exist, set default to off
144 - $options['live_agent_status'] = 'off';
145 - update_option('mxchat_options', $options);
146 - }
147 -}
148 -
149 -
150 -// Run the update check function on every request
151 -add_action('plugins_loaded', 'mxchat_check_for_update');
152 -
153 -// Register activation hook
154 -register_activation_hook(__FILE__, 'mxchat_activate');
155 -
156 -
157 -add_filter('cron_schedules', function($schedules) {
158 - $schedules['one_minute'] = array(
159 - 'interval' => 60,
160 - 'display' => 'Every Minute'
161 - );
162 - return $schedules;
163 -});
164 -
165 -add_action('init', function() {
166 - add_action('mxchat_process_pdf_pages', array('MxChat_Admin', 'process_pdf_pages_cron'), 10, 5);
167 - add_action('mxchat_process_sitemap_urls', array('MxChat_Admin', 'process_sitemap_urls_cron'), 10, 5);
168 -});
169 -
170 -
171 -// Instantiate classes
172 -if (is_admin()) {
173 - $mxchat_admin = new MxChat_Admin();
174 -}
175 -$mxchat_public = new MxChat_Public();
176 -$mxchat_integrator = new MxChat_Integrator();
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: 3.1.3
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 +// Set to true during development to append a timestamp to the version for cache busting.
20 +// Set to false before releasing to production.
21 +if (!defined('MXCHAT_DEV_MODE')) {
22 + define('MXCHAT_DEV_MODE', false);
23 +}
24 +
25 +// Define plugin version constant for asset versioning
26 +// Reads version from plugin header automatically
27 +if (!defined('MXCHAT_VERSION')) {
28 + $plugin_data = get_file_data(__FILE__, array('Version' => 'Version'), 'plugin');
29 + $version = $plugin_data['Version'];
30 + if (MXCHAT_DEV_MODE) {
31 + $version .= '.' . time();
32 + }
33 + define('MXCHAT_VERSION', $version);
34 +}
35 +
36 +function mxchat_load_textdomain() {
37 + $domain = 'mxchat';
38 + $locale = determine_locale();
39 +
40 + // First, try to load from /wp-content/languages/plugins/ (preserved during updates)
41 + $mo_file = WP_LANG_DIR . '/plugins/' . $domain . '-' . $locale . '.mo';
42 + if (file_exists($mo_file)) {
43 + load_textdomain($domain, $mo_file);
44 + return;
45 + }
46 +
47 + // Fallback to plugin's /languages directory
48 + load_plugin_textdomain($domain, false, dirname(plugin_basename(__FILE__)) . '/languages');
49 +}
50 +add_action('init', 'mxchat_load_textdomain');
51 +
52 +/**
53 + * Exclude MxChat assets from caching plugin optimizations
54 + *
55 + * This prevents issues with WP Rocket, LiteSpeed Cache, Autoptimize, WP Super Cache,
56 + * W3 Total Cache, SG Optimizer, and similar plugins that may break the chatbot by
57 + * removing "unused" CSS, minifying/combining JS, or deferring/delaying jQuery.
58 + *
59 + * Both chat-script.js and floating-script.js depend on jQuery, so jQuery must also
60 + * be excluded from any optimization that changes load order or timing.
61 + */
62 +
63 +// ── WP Rocket ────────────────────────────────────────────────────────────────
64 +
65 +// Exclude from Remove Unused CSS (RUCSS)
66 +add_filter('rocket_rucss_inline_atts_exclusions', function($exclusions) {
67 + if (!is_array($exclusions)) $exclusions = array();
68 + $exclusions[] = 'mxchat';
69 + return $exclusions;
70 +});
71 +
72 +// Exclude CSS from minification/combination
73 +add_filter('rocket_exclude_css', function($excluded) {
74 + if (!is_array($excluded)) $excluded = array();
75 + $excluded[] = '/plugins/mxchat-basic/css/chat-style.css';
76 + return $excluded;
77 +});
78 +
79 +// Exclude JS from minification/combination
80 +add_filter('rocket_exclude_js', function($excluded) {
81 + if (!is_array($excluded)) $excluded = array();
82 + $excluded[] = '/plugins/mxchat-basic/js/chat-script.js';
83 + $excluded[] = '/plugins/mxchat-basic/js/floating-script.js';
84 + $excluded[] = '/jquery-core';
85 + $excluded[] = '/jquery.min.js';
86 + $excluded[] = '/jquery.js';
87 + $excluded[] = '/jquery-migrate';
88 + return $excluded;
89 +});
90 +
91 +// Exclude JS from defer
92 +add_filter('rocket_exclude_defer_js', function($excluded) {
93 + if (!is_array($excluded)) $excluded = array();
94 + $excluded[] = '/plugins/mxchat-basic/js/chat-script.js';
95 + $excluded[] = '/plugins/mxchat-basic/js/floating-script.js';
96 + $excluded[] = '/jquery-core';
97 + $excluded[] = '/jquery.min.js';
98 + $excluded[] = '/jquery.js';
99 + $excluded[] = '/jquery-migrate';
100 + return $excluded;
101 +});
102 +
103 +// Exclude from delay JS execution
104 +add_filter('rocket_delay_js_exclusions', function($excluded) {
105 + if (!is_array($excluded)) $excluded = array();
106 + $excluded[] = 'mxchat';
107 + $excluded[] = 'chat-script';
108 + $excluded[] = 'floating-script';
109 + $excluded[] = '/jquery-core';
110 + $excluded[] = '/jquery.min.js';
111 + $excluded[] = '/jquery.js';
112 + $excluded[] = '/jquery-migrate';
113 + return $excluded;
114 +});
115 +
116 +// ── LiteSpeed Cache ──────────────────────────────────────────────────────────
117 +
118 +// Exclude CSS from optimization
119 +add_filter('litespeed_optimize_css_excludes', function($excluded) {
120 + if (!is_array($excluded)) $excluded = array();
121 + $excluded[] = 'chat-style.css';
122 + $excluded[] = 'mxchat';
123 + return $excluded;
124 +});
125 +
126 +// Exclude from UCSS (Unique CSS) - prevents LiteSpeed from stripping "unused" MxChat CSS
127 +add_filter('litespeed_ucss_whitelist', function($whitelist) {
128 + if (!is_array($whitelist)) $whitelist = array();
129 + $whitelist[] = '.mxchat-chatbot-wrapper';
130 + $whitelist[] = '.floating-chatbot';
131 + $whitelist[] = '.floating-chatbot-button';
132 + $whitelist[] = '.chatbot-top-bar';
133 + $whitelist[] = '.mxchat-chatbot';
134 + $whitelist[] = '.chat-container';
135 + $whitelist[] = '.chat-box';
136 + $whitelist[] = '.bot-message';
137 + $whitelist[] = '.input-container';
138 + $whitelist[] = '.chat-input';
139 + $whitelist[] = '.send-button';
140 + $whitelist[] = '.pre-chat-message';
141 + $whitelist[] = '.mxchat-popular-questions';
142 + $whitelist[] = '.chat-toolbar';
143 + $whitelist[] = '.exit-chat';
144 + $whitelist[] = '.email-blocker';
145 + return $whitelist;
146 +});
147 +
148 +// Exclude CSS from CCSS (Critical CSS) generation
149 +add_filter('litespeed_optm_ccss_exc', function($excluded) {
150 + if (!is_array($excluded)) $excluded = array();
151 + $excluded[] = 'chat-style.css';
152 + $excluded[] = 'mxchat';
153 + return $excluded;
154 +});
155 +
156 +// Exclude JS from defer
157 +add_filter('litespeed_optm_js_defer_exc', function($excluded) {
158 + if (!is_array($excluded)) $excluded = array();
159 + $excluded[] = 'chat-script.js';
160 + $excluded[] = 'floating-script.js';
161 + $excluded[] = 'mxchat';
162 + $excluded[] = 'jquery.min.js';
163 + $excluded[] = 'jquery.js';
164 + return $excluded;
165 +});
166 +
167 +// Exclude JS from combining
168 +add_filter('litespeed_optm_js_exc', function($excluded) {
169 + if (!is_array($excluded)) $excluded = array();
170 + $excluded[] = 'chat-script.js';
171 + $excluded[] = 'floating-script.js';
172 + $excluded[] = 'mxchat';
173 + $excluded[] = 'jquery.min.js';
174 + $excluded[] = 'jquery.js';
175 + return $excluded;
176 +});
177 +
178 +// Exclude JS from delayed execution
179 +add_filter('litespeed_optm_js_delay_exc', function($excluded) {
180 + if (!is_array($excluded)) $excluded = array();
181 + $excluded[] = 'chat-script.js';
182 + $excluded[] = 'floating-script.js';
183 + $excluded[] = 'mxchat';
184 + return $excluded;
185 +});
186 +
187 +// Exclude from Guest Mode optimization
188 +add_filter('litespeed_guest_optm_exc', function($excluded) {
189 + if (!is_array($excluded)) $excluded = array();
190 + $excluded[] = 'mxchat';
191 + $excluded[] = 'chat-style';
192 + $excluded[] = 'chat-script';
193 + $excluded[] = 'floating-script';
194 + return $excluded;
195 +});
196 +
197 +// ── Autoptimize ──────────────────────────────────────────────────────────────
198 +
199 +// Exclude CSS from optimization (comma-separated strings)
200 +add_filter('autoptimize_filter_css_exclude', function($excluded) {
201 + if (!is_string($excluded)) $excluded = '';
202 + return $excluded . ', mxchat, chat-style.css';
203 +});
204 +
205 +// Exclude JS from optimization (comma-separated strings)
206 +add_filter('autoptimize_filter_js_exclude', function($excluded) {
207 + if (!is_string($excluded)) $excluded = '';
208 + return $excluded . ', mxchat, chat-script.js, floating-script.js, jquery.min.js, jquery.js';
209 +});
210 +
211 +// ── SG Optimizer (SiteGround) ────────────────────────────────────────────────
212 +
213 +add_filter('sgo_js_minify_exclude', function($excluded) {
214 + if (!is_array($excluded)) $excluded = array();
215 + $excluded[] = 'chat-script.js';
216 + $excluded[] = 'floating-script.js';
217 + $excluded[] = 'jquery.min.js';
218 + return $excluded;
219 +});
220 +
221 +add_filter('sgo_javascript_combine_exclude', function($excluded) {
222 + if (!is_array($excluded)) $excluded = array();
223 + $excluded[] = 'chat-script.js';
224 + $excluded[] = 'floating-script.js';
225 + $excluded[] = 'jquery.min.js';
226 + return $excluded;
227 +});
228 +
229 +add_filter('sgo_js_async_exclude', function($excluded) {
230 + if (!is_array($excluded)) $excluded = array();
231 + $excluded[] = 'chat-script.js';
232 + $excluded[] = 'floating-script.js';
233 + $excluded[] = 'jquery.min.js';
234 + return $excluded;
235 +});
236 +
237 +// ── W3 Total Cache ───────────────────────────────────────────────────────────
238 +
239 +add_filter('w3tc_minify_js_do_tag_minification', function($do_minify, $script_tag, $file) {
240 + if (strpos($file, 'chat-script.js') !== false ||
241 + strpos($file, 'floating-script.js') !== false ||
242 + strpos($file, 'jquery.min.js') !== false ||
243 + strpos($file, 'jquery.js') !== false) {
244 + return false;
245 + }
246 + return $do_minify;
247 +}, 10, 3);
248 +
249 +// ── WP Super Cache ──────────────────────────────────────────────────────────
250 +
251 +add_filter('wpsc_rejected_uri', function($rejected) {
252 + if (!is_array($rejected)) $rejected = array();
253 + $rejected[] = 'wp-admin/admin-ajax.php';
254 + return $rejected;
255 +});
256 +
257 +// Include classes with error handling
258 +function mxchat_include_classes() {
259 + $class_files = array(
260 + 'includes/class-mxchat-integrator.php',
261 + 'includes/class-mxchat-admin.php',
262 + 'includes/class-mxchat-public.php',
263 + 'includes/class-mxchat-utils.php',
264 + 'includes/class-mxchat-user.php',
265 + 'includes/class-mxchat-meta-box.php',
266 + 'includes/class-mxchat-chunker.php',
267 + 'includes/class-mxchat-word-handler.php',
268 + 'includes/class-mxchat-content-generator.php',
269 + 'admin/class-ajax-handler.php',
270 + 'admin/class-pinecone-manager.php',
271 + 'admin/class-knowledge-manager.php'
272 + );
273 +
274 + foreach ($class_files as $file) {
275 + $file_path = plugin_dir_path(__FILE__) . $file;
276 + if (file_exists($file_path)) {
277 + require_once $file_path;
278 + } else {
279 + //error_log('MxChat: Missing class file - ' . $file);
280 + }
281 + }
282 +}
283 +
284 +/**
285 + * Lazy-load the PDF parser library only when needed.
286 + * Avoids loading 44 files on every page request.
287 + */
288 +function mxchat_load_pdf_parser() {
289 + if (class_exists('\Smalot\PdfParser\Parser')) {
290 + return true;
291 + }
292 + $autoload_path = plugin_dir_path(__FILE__) . 'includes/pdf-parser/alt_autoload.php';
293 + if (file_exists($autoload_path)) {
294 + require_once $autoload_path;
295 + return true;
296 + }
297 + return false;
298 +}
299 +
300 +/**
301 + * Create URL click tracking table
302 + */
303 +function mxchat_create_url_clicks_table() {
304 + global $wpdb;
305 +
306 + $table_name = $wpdb->prefix . 'mxchat_url_clicks';
307 +
308 + $charset_collate = $wpdb->get_charset_collate();
309 +
310 + $sql = "CREATE TABLE $table_name (
311 + id mediumint(9) NOT NULL AUTO_INCREMENT,
312 + session_id varchar(100) NOT NULL,
313 + clicked_url text NOT NULL,
314 + message_context text,
315 + click_timestamp datetime DEFAULT CURRENT_TIMESTAMP,
316 + user_ip varchar(45),
317 + user_agent text,
318 + PRIMARY KEY (id),
319 + KEY session_id (session_id),
320 + KEY click_timestamp (click_timestamp)
321 + ) $charset_collate;";
322 +
323 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
324 + dbDelta($sql);
325 +}
326 +
327 +/**
328 + * FIXED: Robust table creation and column management
329 + */
330 +function mxchat_create_chat_transcripts_table() {
331 + global $wpdb;
332 +
333 + $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
334 + $charset_collate = $wpdb->get_charset_collate();
335 +
336 + // Create table with ALL columns including user_name from the start
337 + $sql = "CREATE TABLE $table_name (
338 + id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
339 + user_id MEDIUMINT(9) DEFAULT 0,
340 + session_id VARCHAR(255) NOT NULL,
341 + role VARCHAR(255) NOT NULL,
342 + message TEXT NOT NULL,
343 + user_email VARCHAR(255) DEFAULT NULL,
344 + user_name VARCHAR(100) DEFAULT NULL,
345 + user_identifier VARCHAR(255) DEFAULT NULL,
346 + originating_page_url TEXT DEFAULT NULL,
347 + originating_page_title VARCHAR(500) DEFAULT NULL,
348 + timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
349 + PRIMARY KEY (id),
350 + KEY session_id (session_id),
351 + KEY user_email (user_email),
352 + KEY timestamp (timestamp)
353 + ) $charset_collate;";
354 +
355 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
356 + $result = dbDelta($sql);
357 +
358 + // Log the result for debugging
359 + if (empty($result)) {
360 + //error_log("MxChat: dbDelta returned empty result for chat transcripts table");
361 + } else {
362 + //error_log("MxChat: dbDelta result: " . print_r($result, true));
363 + }
364 +
365 + // IMPORTANT: Ensure all columns exist for existing installations
366 + mxchat_ensure_all_columns($table_name);
367 +}
368 +
369 +/**
370 + * Ensure all required columns exist (for upgrades)
371 + */
372 +function mxchat_ensure_all_columns($table_name) {
373 + global $wpdb;
374 +
375 + // First check if table exists
376 + $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
377 + if (!$table_exists) {
378 + //error_log("MxChat: Table $table_name does not exist, cannot add columns");
379 + return;
380 + }
381 +
382 + // Define all required columns and their types
383 + $required_columns = [
384 + 'user_identifier' => 'VARCHAR(255) DEFAULT NULL',
385 + 'user_email' => 'VARCHAR(255) DEFAULT NULL',
386 + 'user_name' => 'VARCHAR(100) DEFAULT NULL',
387 + 'originating_page_url' => 'TEXT DEFAULT NULL',
388 + 'originating_page_title' => 'VARCHAR(500) DEFAULT NULL',
389 + 'rag_context' => 'LONGTEXT DEFAULT NULL'
390 + ];
391 +
392 + // Get existing columns
393 + $existing_columns = $wpdb->get_results("SHOW COLUMNS FROM $table_name");
394 + if (empty($existing_columns)) {
395 + //error_log("MxChat: Could not get columns for table $table_name");
396 + return;
397 + }
398 +
399 + $existing_column_names = array_column($existing_columns, 'Field');
400 +
401 + // Add missing columns
402 + foreach ($required_columns as $column_name => $column_definition) {
403 + if (!in_array($column_name, $existing_column_names)) {
404 + $alter_sql = "ALTER TABLE $table_name ADD COLUMN $column_name $column_definition";
405 + $result = $wpdb->query($alter_sql);
406 +
407 + if ($result === false) {
408 + //error_log("MxChat: Failed to add column $column_name to $table_name. Error: " . $wpdb->last_error);
409 + } else {
410 + //error_log("MxChat: Successfully added column $column_name to $table_name");
411 + }
412 + }
413 + }
414 +}
415 +
416 +/**
417 + * Add role restriction column to knowledge base table
418 + */
419 +function mxchat_add_role_restriction_column() {
420 + global $wpdb;
421 + $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
422 +
423 + // Check if table exists first
424 + $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
425 + if (!$table_exists) {
426 + //error_log("MxChat: System prompt content table does not exist, cannot add role_restriction column");
427 + return;
428 + }
429 +
430 + // Check if column already exists
431 + $column_exists = $wpdb->get_results(
432 + $wpdb->prepare(
433 + "SHOW COLUMNS FROM {$table_name} LIKE %s",
434 + 'role_restriction'
435 + )
436 + );
437 +
438 + if (empty($column_exists)) {
439 + $alter_sql = "ALTER TABLE {$table_name} ADD COLUMN role_restriction VARCHAR(50) DEFAULT 'public' AFTER source_url";
440 + $result = $wpdb->query($alter_sql);
441 +
442 + if ($result === false) {
443 + //error_log("MxChat: Failed to add role_restriction column. Error: " . $wpdb->last_error);
444 + } else {
445 + //error_log("MxChat: Successfully added role_restriction column");
446 +
447 + // Set all existing records to 'public' (everyone can access)
448 + $update_result = $wpdb->query(
449 + "UPDATE {$table_name}
450 + SET role_restriction = 'public'
451 + WHERE role_restriction IS NULL OR role_restriction = ''"
452 + );
453 +
454 + if ($update_result !== false) {
455 + //error_log("MxChat: Updated {$update_result} existing records to public access");
456 + }
457 + }
458 + }
459 +}
460 +
461 +/**
462 + * Add enabled_bots column to intents table for multi-bot action filtering
463 + */
464 +function mxchat_add_enabled_bots_column() {
465 + global $wpdb;
466 + $table_name = $wpdb->prefix . 'mxchat_intents';
467 +
468 + // Check if table exists first
469 + $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
470 + if (!$table_exists) {
471 + //error_log("MxChat: Intents table does not exist, cannot add enabled_bots column");
472 + return;
473 + }
474 +
475 + // Check if column already exists
476 + $column_exists = $wpdb->get_results(
477 + $wpdb->prepare(
478 + "SHOW COLUMNS FROM {$table_name} LIKE %s",
479 + 'enabled_bots'
480 + )
481 + );
482 +
483 + if (empty($column_exists)) {
484 + $alter_sql = "ALTER TABLE {$table_name} ADD COLUMN enabled_bots LONGTEXT DEFAULT NULL AFTER enabled";
485 + $result = $wpdb->query($alter_sql);
486 +
487 + if ($result === false) {
488 + //error_log("MxChat: Failed to add enabled_bots column. Error: " . $wpdb->last_error);
489 + } else {
490 + //error_log("MxChat: Successfully added enabled_bots column");
491 +
492 + // Set all existing actions to work with 'default' bot for backward compatibility
493 + $default_bots = json_encode(['default']);
494 + $update_result = $wpdb->query(
495 + $wpdb->prepare(
496 + "UPDATE {$table_name}
497 + SET enabled_bots = %s
498 + WHERE enabled_bots IS NULL OR enabled_bots = ''",
499 + $default_bots
500 + )
501 + );
502 +
503 + if ($update_result !== false) {
504 + //error_log("MxChat: Updated {$update_result} existing actions to work with default bot");
505 + }
506 + }
507 + }
508 +}
509 +
510 +/**
511 + * Create Pinecone role restrictions table with multi-bot support
512 + */
513 +function mxchat_create_pinecone_roles_table() {
514 + global $wpdb;
515 +
516 + $table_name = $wpdb->prefix . 'mxchat_pinecone_roles';
517 + $charset_collate = $wpdb->get_charset_collate();
518 +
519 + $sql = "CREATE TABLE $table_name (
520 + id mediumint(9) NOT NULL AUTO_INCREMENT,
521 + vector_id varchar(255) NOT NULL,
522 + bot_id varchar(50) NOT NULL DEFAULT 'default',
523 + source_url text,
524 + role_restriction varchar(50) DEFAULT 'public',
525 + updated_at timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
526 + PRIMARY KEY (id),
527 + UNIQUE KEY vector_bot (vector_id, bot_id),
528 + KEY role_restriction (role_restriction),
529 + KEY bot_id (bot_id)
530 + ) $charset_collate;";
531 +
532 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
533 + dbDelta($sql);
534 +}
535 +
536 +/**
537 + * Add bot_id column to mxchat_pinecone_roles table for multi-bot support
538 + * This migration runs once to update existing installations
539 + */
540 +function mxchat_migrate_pinecone_roles_add_bot_id() {
541 + global $wpdb;
542 +
543 + // Check if migration already ran
544 + $migration_version = get_option('mxchat_pinecone_roles_migration_version', '0');
545 + if (version_compare($migration_version, '2.5.2', '>=')) {
546 + return; // Already migrated
547 + }
548 +
549 + $table_name = $wpdb->prefix . 'mxchat_pinecone_roles';
550 +
551 + // Check if table exists
552 + if ($wpdb->get_var("SHOW TABLES LIKE '{$table_name}'") != $table_name) {
553 + return; // Table doesn't exist yet
554 + }
555 +
556 + // Check if bot_id column already exists
557 + $column_exists = $wpdb->get_results("SHOW COLUMNS FROM {$table_name} LIKE 'bot_id'");
558 +
559 + if (empty($column_exists)) {
560 + // Add bot_id column
561 + $wpdb->query("ALTER TABLE {$table_name} ADD COLUMN bot_id VARCHAR(50) NOT NULL DEFAULT 'default' AFTER vector_id");
562 +
563 + // Update the unique key to include bot_id
564 + $wpdb->query("ALTER TABLE {$table_name} DROP INDEX vector_id");
565 + $wpdb->query("ALTER TABLE {$table_name} ADD UNIQUE KEY vector_bot (vector_id, bot_id)");
566 +
567 + // Add index for bot_id
568 + $wpdb->query("ALTER TABLE {$table_name} ADD KEY bot_id (bot_id)");
569 +
570 + //error_log('MxChat: Successfully added bot_id column to mxchat_pinecone_roles table');
571 + }
572 +
573 + // Mark migration as complete
574 + update_option('mxchat_pinecone_roles_migration_version', '2.5.2');
575 +}
576 +
577 +/**
578 + * 2.5.6: Add content_type column to mxchat_system_prompt_content table
579 + * Enables filtering knowledge base by content type (posts, pages, PDFs, etc.)
580 + */
581 +function mxchat_migrate_add_content_type_column() {
582 + global $wpdb;
583 +
584 + // Check if migration already ran
585 + $migration_version = get_option('mxchat_content_type_migration_version', '0');
586 + if (version_compare($migration_version, '2.5.6', '>=')) {
587 + return;
588 + }
589 +
590 + $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
591 +
592 + // Check if table exists
593 + if ($wpdb->get_var("SHOW TABLES LIKE '{$table_name}'") != $table_name) {
594 + return;
595 + }
596 +
597 + // Check if content_type column already exists
598 + $column_exists = $wpdb->get_results("SHOW COLUMNS FROM {$table_name} LIKE 'content_type'");
599 +
600 + if (empty($column_exists)) {
601 + // Add content_type column with default value 'content' for backwards compatibility
602 + $wpdb->query("ALTER TABLE {$table_name} ADD COLUMN content_type VARCHAR(50) DEFAULT 'content' AFTER role_restriction");
603 +
604 + // Add index for better query performance
605 + $wpdb->query("ALTER TABLE {$table_name} ADD KEY content_type (content_type)");
606 +
607 + //error_log('MxChat: Successfully added content_type column to mxchat_system_prompt_content table');
608 + }
609 +
610 + // Mark migration as complete
611 + update_option('mxchat_content_type_migration_version', '2.5.6');
612 +}
613 +
614 +/**
615 + * 2.5.2: Create queue processing tables for reliable background processing
616 + */
617 +function mxchat_create_queue_tables() {
618 + global $wpdb;
619 + $charset_collate = $wpdb->get_charset_collate();
620 +
621 + // Main queue table
622 + $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
623 + $sql_queue = "CREATE TABLE $queue_table (
624 + id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
625 + queue_id varchar(64) NOT NULL,
626 + item_type varchar(20) NOT NULL,
627 + item_data longtext NOT NULL,
628 + status varchar(20) NOT NULL DEFAULT 'pending',
629 + bot_id varchar(50) NOT NULL DEFAULT 'default',
630 + priority int(11) NOT NULL DEFAULT 0,
631 + attempts int(11) NOT NULL DEFAULT 0,
632 + max_attempts int(11) NOT NULL DEFAULT 3,
633 + error_message text DEFAULT NULL,
634 + created_at datetime NOT NULL,
635 + started_at datetime DEFAULT NULL,
636 + completed_at datetime DEFAULT NULL,
637 + PRIMARY KEY (id),
638 + KEY queue_id (queue_id),
639 + KEY status (status),
640 + KEY item_type (item_type),
641 + KEY priority (priority)
642 + ) $charset_collate;";
643 +
644 + // Queue metadata table
645 + $meta_table = $wpdb->prefix . 'mxchat_queue_meta';
646 + $sql_meta = "CREATE TABLE $meta_table (
647 + id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
648 + queue_id varchar(64) NOT NULL,
649 + meta_key varchar(255) NOT NULL,
650 + meta_value longtext,
651 + PRIMARY KEY (id),
652 + KEY queue_id (queue_id),
653 + KEY meta_key (meta_key)
654 + ) $charset_collate;";
655 +
656 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
657 + dbDelta($sql_queue);
658 + dbDelta($sql_meta);
659 +
660 + //error_log("MxChat: Queue tables created/updated successfully");
661 +}
662 +
663 +/**
664 + * Create transcript translations table for persisting translations
665 + */
666 +function mxchat_create_translations_table() {
667 + global $wpdb;
668 + $charset_collate = $wpdb->get_charset_collate();
669 +
670 + $table_name = $wpdb->prefix . 'mxchat_transcript_translations';
671 + $sql = "CREATE TABLE $table_name (
672 + id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
673 + session_id varchar(255) NOT NULL,
674 + language_code varchar(10) NOT NULL,
675 + translations longtext NOT NULL,
676 + created_at datetime NOT NULL,
677 + updated_at datetime NOT NULL,
678 + PRIMARY KEY (id),
679 + UNIQUE KEY session_lang (session_id, language_code),
680 + KEY session_id (session_id)
681 + ) $charset_collate;";
682 +
683 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
684 + dbDelta($sql);
685 +}
686 +
687 +/**
688 + * 2.5.2: Fix URL column size to support long URLs (especially with UTF-8 encoding)
689 + * This fixes "url, source_url. The supplied values may be too long" errors
690 + */
691 +function mxchat_fix_url_column_size() {
692 + global $wpdb;
693 + $table_name = $wpdb->prefix . 'mxchat_system_prompt_content';
694 +
695 + // Check if table exists
696 + $table_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
697 + if (!$table_exists) {
698 + return;
699 + }
700 +
701 + // Change url and source_url from VARCHAR to TEXT to handle long URLs
702 + // This is especially important for URLs with UTF-8 encoded characters (Hebrew, Arabic, etc.)
703 + $wpdb->query("ALTER TABLE {$table_name} MODIFY COLUMN url TEXT");
704 + $wpdb->query("ALTER TABLE {$table_name} MODIFY COLUMN source_url TEXT");
705 +
706 + //error_log("MxChat: Successfully updated url and source_url columns to TEXT type for long URL support");
707 +}
708 +
709 +/**
710 + * Migrate deprecated AI models to their replacements
711 + * Version 2.5.1: Migrate Claude 3.5 Sonnet (deprecated) to Claude 3.7 Sonnet
712 + * Version 3.1.2: Convert chat transcripts table to utf8mb4 for emoji support
713 + * Without utf8mb4, any bot response containing emojis silently fails to insert.
714 + */
715 +function mxchat_migrate_transcripts_charset() {
716 + global $wpdb;
717 + $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
718 + $wpdb->query("ALTER TABLE $table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci");
719 +}
720 +
721 +/**
722 + * Version 3.0.55: Migrate GPT-4 series models (deprecated 2026-02-17) to GPT-5 series
723 + */
724 +function mxchat_migrate_deprecated_models() {
725 + $options = get_option('mxchat_options', array());
726 + $migrated = false;
727 + $migration_message = '';
728 +
729 + if (!isset($options['model'])) {
730 + return;
731 + }
732 +
733 + $current_model = $options['model'];
734 +
735 + // Migrate deprecated Claude models to Claude Opus 4.6 (recommended replacement per Anthropic)
736 + $deprecated_claude_models = array(
737 + 'claude-3-5-sonnet-20240620', // Retired Oct 28, 2025
738 + 'claude-3-5-sonnet-20241022', // Retired Oct 28, 2025
739 + 'claude-3-7-sonnet-20250219', // Retiring Feb 19, 2026
740 + 'claude-3-opus-20240229', // Retired Jan 5, 2026
741 + 'claude-3-sonnet-20240229', // Legacy
742 + 'claude-3-haiku-20240307', // Legacy
743 + );
744 + if (in_array($current_model, $deprecated_claude_models, true)) {
745 + $options['model'] = 'claude-opus-4-6';
746 + $migrated = true;
747 + $migration_message = sprintf(
748 + __('Your chatbot model has been automatically updated from %s to Claude Opus 4.6 due to Anthropic deprecating older Claude models.', 'mxchat'),
749 + $current_model
750 + );
751 + }
752 +
753 + // Migrate deprecated Claude Haiku 3.5 to Claude Haiku 4.5
754 + if ($current_model === 'claude-3-5-haiku-20241022') {
755 + $options['model'] = 'claude-haiku-4-5-20251001';
756 + $migrated = true;
757 + $migration_message = __('Your chatbot model has been automatically updated from Claude Haiku 3.5 to Claude Haiku 4.5 due to Anthropic deprecating the older model.', 'mxchat');
758 + }
759 +
760 + // Migrate deprecated GPT-4 series and GPT-3.5 Turbo to GPT-5.1 Chat Latest
761 + if (in_array($current_model, array('gpt-4o', 'gpt-4.1-2025-04-14', 'gpt-4-turbo', 'gpt-4', 'gpt-3.5-turbo'), true)) {
762 + $options['model'] = 'gpt-5.1-chat-latest';
763 + $migrated = true;
764 + $migration_message = sprintf(
765 + __('Your chatbot model has been automatically updated from %s to GPT-5.1 Chat Latest due to OpenAI deprecating older models.', 'mxchat'),
766 + $current_model
767 + );
768 + }
769 +
770 + // Migrate deprecated GPT-4o Mini and GPT-4.1 Mini to GPT-5 Mini
771 + if (in_array($current_model, array('gpt-4o-mini', 'gpt-4.1-mini'), true)) {
772 + $options['model'] = 'gpt-5-mini';
773 + $migrated = true;
774 + $migration_message = sprintf(
775 + __('Your chatbot model has been automatically updated from %s to GPT-5 Mini due to OpenAI deprecating GPT-4 series models.', 'mxchat'),
776 + $current_model
777 + );
778 + }
779 +
780 + if ($migrated) {
781 + update_option('mxchat_options', $options);
782 + update_option('mxchat_model_migrated_notice', true);
783 + update_option('mxchat_model_migration_message', $migration_message);
784 + }
785 +}
786 +
787 +/**
788 + * Show admin notice after model migration
789 + */
790 +function mxchat_show_migration_notice() {
791 + if (get_option('mxchat_model_migrated_notice')) {
792 + $migration_message = get_option('mxchat_model_migration_message', __('Your chatbot model has been automatically updated due to a model deprecation.', 'mxchat'));
793 + ?>
794 + <div class="notice notice-info is-dismissible">
795 + <p>
796 + <strong><?php esc_html_e('MxChat Model Updated', 'mxchat'); ?></strong><br>
797 + <?php echo esc_html($migration_message); ?>
798 + </p>
799 + </div>
800 + <?php
801 + delete_option('mxchat_model_migrated_notice');
802 + delete_option('mxchat_model_migration_message');
803 + }
804 +}
805 +
806 +function mxchat_activate() {
807 + global $wpdb;
808 + $charset_collate = $wpdb->get_charset_collate();
809 +
810 + //error_log("MxChat: Running activation function");
811 +
812 + // Create chat transcripts table with improved function
813 + mxchat_create_chat_transcripts_table();
814 +
815 + // System Prompt Content Table - UPDATED: Use TEXT for url and source_url columns
816 + $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
817 + $sql_system_prompt = "CREATE TABLE $system_prompt_table (
818 + id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
819 + url TEXT NOT NULL,
820 + article_content LONGTEXT NOT NULL,
821 + embedding_vector LONGTEXT,
822 + source_url TEXT DEFAULT NULL,
823 + role_restriction VARCHAR(50) DEFAULT 'public',
824 + content_type VARCHAR(50) DEFAULT 'content',
825 + timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL,
826 + PRIMARY KEY (id),
827 + KEY content_type (content_type)
828 + ) $charset_collate;";
829 +
830 + // Intents Table - NOW INCLUDES enabled_bots column from the start
831 + $intents_table = $wpdb->prefix . 'mxchat_intents';
832 + $sql_intents_table = "CREATE TABLE $intents_table (
833 + id BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
834 + intent_label VARCHAR(255) NOT NULL,
835 + phrases TEXT NOT NULL,
836 + embedding_vector LONGTEXT NOT NULL,
837 + callback_function VARCHAR(255) NOT NULL,
838 + similarity_threshold FLOAT DEFAULT 0.85,
839 + enabled TINYINT(1) NOT NULL DEFAULT 1,
840 + enabled_bots LONGTEXT DEFAULT NULL,
841 + PRIMARY KEY (id)
842 + ) $charset_collate;";
843 +
844 + require_once ABSPATH . 'wp-admin/includes/upgrade.php';
845 +
846 + // Create other tables
847 + dbDelta($sql_system_prompt);
848 + dbDelta($sql_intents_table);
849 +
850 + // Create URL click tracking table
851 + mxchat_create_url_clicks_table();
852 +
853 + // Create Pinecone roles table
854 + mxchat_create_pinecone_roles_table();
855 +
856 + // NEW 2.5.2: Create queue processing tables
857 + mxchat_create_queue_tables();
858 +
859 + // Create transcript translations table
860 + mxchat_create_translations_table();
861 +
862 + // Ensure additional columns in system prompt table
863 + $existing_system_columns = $wpdb->get_results("SHOW COLUMNS FROM $system_prompt_table");
864 + if (!empty($existing_system_columns)) {
865 + $existing_system_column_names = array_column($existing_system_columns, 'Field');
866 +
867 + if (!in_array('embedding_vector', $existing_system_column_names)) {
868 + $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN embedding_vector LONGTEXT");
869 + }
870 + if (!in_array('source_url', $existing_system_column_names)) {
871 + $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN source_url TEXT DEFAULT NULL");
872 + }
873 + if (!in_array('role_restriction', $existing_system_column_names)) {
874 + $wpdb->query("ALTER TABLE $system_prompt_table ADD COLUMN role_restriction VARCHAR(50) DEFAULT 'public' AFTER source_url");
875 + }
876 + }
877 +
878 + // Set default thresholds for existing intents
879 + $wpdb->query("UPDATE {$intents_table} SET similarity_threshold = 0.85 WHERE similarity_threshold IS NULL");
880 +
881 + // Ensure enabled column exists in intents table
882 + $existing_intent_columns = $wpdb->get_results("SHOW COLUMNS FROM $intents_table");
883 + if (!empty($existing_intent_columns)) {
884 + $existing_intent_column_names = array_column($existing_intent_columns, 'Field');
885 +
886 + if (!in_array('enabled', $existing_intent_column_names)) {
887 + $wpdb->query("ALTER TABLE $intents_table ADD COLUMN enabled TINYINT(1) NOT NULL DEFAULT 1");
888 + }
889 +
890 + // Ensure enabled_bots column exists for existing installations
891 + if (!in_array('enabled_bots', $existing_intent_column_names)) {
892 + $wpdb->query("ALTER TABLE $intents_table ADD COLUMN enabled_bots LONGTEXT DEFAULT NULL AFTER enabled");
893 +
894 + // Set existing actions to work with default bot
895 + $default_bots = json_encode(['default']);
896 + $wpdb->query($wpdb->prepare(
897 + "UPDATE {$intents_table} SET enabled_bots = %s WHERE enabled_bots IS NULL",
898 + $default_bots
899 + ));
900 + }
901 + }
902 +
903 + // Run migration for existing installations
904 + mxchat_migrate_pinecone_roles_add_bot_id();
905 +
906 + // Setup cron jobs
907 + mxchat_setup_cron_jobs();
908 +
909 + // Update version
910 + update_option('mxchat_plugin_version', MXCHAT_VERSION);
911 +
912 + //error_log("MxChat: Activation function completed");
913 +}
914 +
915 +/**
916 + * Setup cron jobs on plugin activation
917 + */
918 +function mxchat_setup_cron_jobs() {
919 + // Clear any existing cron jobs first
920 + wp_clear_scheduled_hook('mxchat_reset_rate_limits');
921 +
922 + // Check if WordPress cron is disabled
923 + if (defined('DISABLE_WP_CRON') && DISABLE_WP_CRON) {
924 + // Set flag to use fallback system
925 + update_option('mxchat_use_fallback_rate_limits', true);
926 + update_option('mxchat_next_rate_limit_check', time() + 3600);
927 + return;
928 + }
929 +
930 + // Schedule the rate limit reset cron job
931 + $result = wp_schedule_event(time() + 300, 'hourly', 'mxchat_reset_rate_limits');
932 +
933 + if ($result === false) {
934 + // Fallback if scheduling fails
935 + update_option('mxchat_use_fallback_rate_limits', true);
936 + update_option('mxchat_next_rate_limit_check', time() + 3600);
937 + } else {
938 + // Clear fallback flags if cron scheduling succeeded
939 + delete_option('mxchat_use_fallback_rate_limits');
940 + }
941 +
942 + // Schedule transcript cleanup if configured
943 + $transcript_options = get_option('mxchat_transcripts_options', array());
944 + $cleanup_interval = isset($transcript_options['mxchat_auto_delete_transcripts']) ? $transcript_options['mxchat_auto_delete_transcripts'] : 'never';
945 +
946 + if ($cleanup_interval !== 'never') {
947 + // Check if not already scheduled
948 + if (!wp_next_scheduled('mxchat_cleanup_old_transcripts')) {
949 + // Schedule to run daily at 3 AM
950 + $next_run = strtotime('tomorrow 3:00 AM');
951 + wp_schedule_event($next_run, 'daily', 'mxchat_cleanup_old_transcripts');
952 + }
953 + }
954 +}
955 +
956 +/**
957 + * Clean up on plugin deactivation
958 + */
959 +function mxchat_deactivate() {
960 + // Clear scheduled cron jobs
961 + wp_clear_scheduled_hook('mxchat_reset_rate_limits');
962 + wp_clear_scheduled_hook('mxchat_cleanup_old_transcripts');
963 + wp_clear_scheduled_hook('mxchat_send_delayed_transcript');
964 +
965 + // Clear fallback options
966 + delete_option('mxchat_use_fallback_rate_limits');
967 + delete_option('mxchat_next_rate_limit_check');
968 + delete_option('mxchat_fallback_check_interval');
969 +
970 + // NOTE: We do NOT delete queue tables on deactivation
971 + // This preserves data if user accidentally deactivates the plugin
972 +}
973 +
974 +/**
975 + * Check if fallback rate limit cleanup is needed
976 + */
977 +function mxchat_check_fallback_rate_limits() {
978 + $use_fallback = get_option('mxchat_use_fallback_rate_limits', false);
979 +
980 + if (!$use_fallback) {
981 + return;
982 + }
983 +
984 + $next_check = get_option('mxchat_next_rate_limit_check', 0);
985 +
986 + if (time() >= $next_check) {
987 + // Only run reset if the MxChat_Integrator class exists
988 + if (class_exists('MxChat_Integrator')) {
989 + $integrator = new MxChat_Integrator();
990 + if (method_exists($integrator, 'mxchat_reset_rate_limits')) {
991 + $integrator->mxchat_reset_rate_limits();
992 + update_option('mxchat_next_rate_limit_check', time() + 3600);
993 + }
994 + }
995 + }
996 +}
997 +
998 +/**
999 + * Robust update checking with role restriction migration, model deprecation, and queue tables
1000 + * CRITICAL: This runs on EVERY page load to ensure tables exist
1001 + */
1002 +function mxchat_check_for_update() {
1003 + global $wpdb;
1004 +
1005 + try {
1006 + $current_version = get_option('mxchat_plugin_version', '0.0.0');
1007 + $plugin_version = MXCHAT_VERSION;
1008 +
1009 + // Always ensure critical tables exist (even if version matches)
1010 + // This handles manual table deletion or fresh installs
1011 + $chat_table = $wpdb->prefix . 'mxchat_chat_transcripts';
1012 + $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
1013 +
1014 + $chat_exists = $wpdb->get_var("SHOW TABLES LIKE '$chat_table'") === $chat_table;
1015 + $queue_exists = $wpdb->get_var("SHOW TABLES LIKE '$queue_table'") === $queue_table;
1016 +
1017 + if (!$chat_exists || !$queue_exists) {
1018 + //error_log("MxChat: Critical tables missing, running activation");
1019 + mxchat_activate();
1020 + }
1021 +
1022 + // Version-specific migrations
1023 + if ($current_version !== $plugin_version) {
1024 + //error_log("MxChat: Version change detected: $current_version -> $plugin_version");
1025 +
1026 + // Run live agent update BEFORE updating the stored version
1027 + mxchat_handle_live_agent_update();
1028 +
1029 + // Run theme migration notice for 3.0.1 (AI theme CSS structure changes)
1030 + mxchat_handle_theme_migration_notice();
1031 +
1032 + // Run role restriction migration for 2.4.1
1033 + if (version_compare($current_version, '2.4.1', '<')) {
1034 + mxchat_add_role_restriction_column();
1035 + }
1036 +
1037 + // Run enabled_bots column migration for 2.4.4
1038 + if (version_compare($current_version, '2.4.4', '<')) {
1039 + mxchat_add_enabled_bots_column();
1040 + }
1041 +
1042 + // Run model migration for 2.5.1 (Claude deprecation)
1043 + if (version_compare($current_version, '2.5.1', '<')) {
1044 + mxchat_migrate_deprecated_models();
1045 + }
1046 +
1047 + // 2.5.2: Ensure queue tables exist and fix URL column sizes for all users upgrading to 2.5.2
1048 + if (version_compare($current_version, '2.5.2', '<')) {
1049 + mxchat_create_queue_tables();
1050 + mxchat_fix_url_column_size(); // NEW: Fix URL column size for long URLs
1051 + //error_log("MxChat: Queue tables created and URL columns updated for upgrade to 2.5.2");
1052 + }
1053 +
1054 + // 2.6.0: Ensure rag_context column exists for retrieved documents feature
1055 + if (version_compare($current_version, '2.6.0', '<')) {
1056 + $chat_table = $wpdb->prefix . 'mxchat_chat_transcripts';
1057 + mxchat_ensure_all_columns($chat_table);
1058 + //error_log("MxChat: rag_context column migration for 2.6.0");
1059 + }
1060 +
1061 + // 3.0.5: Migrate deprecated Gemini embedding model
1062 + if (version_compare($current_version, '3.0.5', '<')) {
1063 + mxchat_migrate_gemini_embedding_model();
1064 + }
1065 +
1066 + // 3.0.6: Migrate deprecated OpenAI and Claude models
1067 + if (version_compare($current_version, '3.0.6', '<')) {
1068 + mxchat_migrate_deprecated_models();
1069 + }
1070 +
1071 + // 3.1.2: Convert chat transcripts table to utf8mb4 for emoji support
1072 + if (version_compare($current_version, '3.1.2', '<')) {
1073 + mxchat_migrate_transcripts_charset();
1074 + }
1075 +
1076 + // Run full activation to ensure everything is up to date
1077 + mxchat_activate();
1078 +
1079 + // Run migration functions
1080 + mxchat_migrate_live_agent_status();
1081 +
1082 + // Add the cleanup function for version 2.1.8
1083 + if (version_compare($current_version, '2.1.8', '<')) {
1084 + $deleted = mxchat_cleanup_orphaned_chat_history();
1085 + }
1086 +
1087 + // Update version LAST
1088 + update_option('mxchat_plugin_version', $plugin_version);
1089 +
1090 + //error_log("MxChat: Updated from version $current_version to $plugin_version");
1091 + }
1092 +
1093 + } catch (Exception $e) {
1094 + //error_log('MxChat update error: ' . $e->getMessage());
1095 + // Don't update version if there was an error
1096 + }
1097 +}
1098 +
1099 +/**
1100 + * Ensure tables exist on every admin load for fresh installations
1101 + * This is a safety net for cases where activation hook doesn't fire
1102 + */
1103 +function mxchat_ensure_tables_exist() {
1104 + global $wpdb;
1105 +
1106 + // Only run for admin users to avoid performance impact
1107 + if (!current_user_can('administrator')) {
1108 + return;
1109 + }
1110 +
1111 + // Check if we've already verified tables in this session
1112 + static $tables_checked = false;
1113 + if ($tables_checked) {
1114 + return;
1115 + }
1116 + $tables_checked = true;
1117 +
1118 + $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
1119 + $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
1120 +
1121 + $chat_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
1122 + $queue_exists = $wpdb->get_var("SHOW TABLES LIKE '$queue_table'") === $queue_table;
1123 +
1124 + if (!$chat_exists || !$queue_exists) {
1125 + //error_log("MxChat: Tables missing on admin load, running activation");
1126 + mxchat_activate();
1127 + }
1128 +}
1129 +
1130 +/**
1131 + * Clean up orphaned chat history options from the wp_options table
1132 + * @return int Number of options deleted
1133 + */
1134 +function mxchat_cleanup_orphaned_chat_history() {
1135 + global $wpdb;
1136 + $count = 0;
1137 +
1138 + // Get all option keys that match our pattern
1139 + $history_options = $wpdb->get_results(
1140 + "SELECT option_name FROM {$wpdb->options}
1141 + WHERE option_name LIKE 'mxchat_history_%'"
1142 + );
1143 +
1144 + if (!empty($history_options)) {
1145 + foreach ($history_options as $option) {
1146 + // Extract the session ID from the option name
1147 + $session_id = str_replace('mxchat_history_', '', $option->option_name);
1148 +
1149 + // Check if this session still exists in the custom table
1150 + $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
1151 + $exists = $wpdb->get_var(
1152 + $wpdb->prepare(
1153 + "SELECT COUNT(*) FROM {$table_name} WHERE session_id = %s",
1154 + $session_id
1155 + )
1156 + );
1157 +
1158 + // If session doesn't exist in the main table, delete the option
1159 + if ($exists == 0) {
1160 + delete_option($option->option_name);
1161 + // Also delete related metadata
1162 + delete_option("mxchat_email_{$session_id}");
1163 + delete_option("mxchat_name_{$session_id}");
1164 + delete_option("mxchat_agent_name_{$session_id}");
1165 + $count++;
1166 + }
1167 + }
1168 + }
1169 +
1170 + return $count;
1171 +}
1172 +
1173 +function mxchat_migrate_live_agent_status() {
1174 + $options = get_option('mxchat_options', []);
1175 +
1176 + // Check if live_agent_status exists
1177 + if (isset($options['live_agent_status'])) {
1178 + $current_status = $options['live_agent_status'];
1179 + $needs_update = false;
1180 +
1181 + // Convert to new format if needed
1182 + if ($current_status === 'online') {
1183 + $options['live_agent_status'] = 'on';
1184 + $needs_update = true;
1185 + } else if ($current_status === 'offline') {
1186 + $options['live_agent_status'] = 'off';
1187 + $needs_update = true;
1188 + } else if (!in_array($current_status, ['on', 'off'])) {
1189 + // Default to off for any unexpected values
1190 + $options['live_agent_status'] = 'off';
1191 + $needs_update = true;
1192 + }
1193 +
1194 + // Only update if needed
1195 + if ($needs_update) {
1196 + update_option('mxchat_options', $options);
1197 + }
1198 + } else {
1199 + // If status doesn't exist, set default to off
1200 + $options['live_agent_status'] = 'off';
1201 + update_option('mxchat_options', $options);
1202 + }
1203 +}
1204 +
1205 +function mxchat_handle_live_agent_update() {
1206 + // Get the CURRENT stored version (before it gets updated)
1207 + $current_version = get_option('mxchat_plugin_version', '0.0.0');
1208 + $new_version = '2.2.2';
1209 +
1210 + // Only run this once for the update to 2.2.2
1211 + $update_handled = get_option('mxchat_live_agent_update_2_2_2_handled', false);
1212 +
1213 + // Check if we're upgrading TO 2.2.2 and haven't handled this yet
1214 + if (version_compare($current_version, $new_version, '<') && !$update_handled) {
1215 + $options = get_option('mxchat_options', array());
1216 +
1217 + // Check if live agent was previously enabled
1218 + if (isset($options['live_agent_status']) && $options['live_agent_status'] === 'on') {
1219 + // Disable live agent
1220 + $options['live_agent_status'] = 'off';
1221 + update_option('mxchat_options', $options);
1222 +
1223 + // Set flag to show the notification banner
1224 + update_option('mxchat_show_live_agent_disabled_notice', true);
1225 + }
1226 +
1227 + // Mark this update as handled
1228 + update_option('mxchat_live_agent_update_2_2_2_handled', true);
1229 + }
1230 +}
1231 +
1232 +/**
1233 + * Handle theme migration notice for version 3.0.1
1234 + * Shows a dismissible notice to Pro users about migrating AI-generated themes
1235 + */
1236 +function mxchat_handle_theme_migration_notice() {
1237 + // Get the CURRENT stored version (before it gets updated)
1238 + $current_version = get_option('mxchat_plugin_version', '0.0.0');
1239 + $target_version = '3.0.1';
1240 +
1241 + // Only run this once for the update to 3.0.1
1242 + $update_handled = get_option('mxchat_theme_migration_update_3_0_1_handled', false);
1243 +
1244 + // Check if we're upgrading TO 3.0.1 and haven't handled this yet
1245 + if (version_compare($current_version, $target_version, '<') && !$update_handled) {
1246 + // Check if Pro is activated - only show to Pro users
1247 + $license_status = get_option('mxchat_license_status', 'inactive');
1248 + $is_pro = ($license_status === 'active' || $license_status === esc_html__('active', 'mxchat'));
1249 +
1250 + if ($is_pro) {
1251 + // Set flag to show the theme migration notification banner
1252 + update_option('mxchat_show_theme_migration_notice', true);
1253 + }
1254 +
1255 + // Mark this update as handled (whether Pro or not)
1256 + update_option('mxchat_theme_migration_update_3_0_1_handled', true);
1257 + }
1258 +}
1259 +
1260 +// Initialize plugin safely
1261 +function mxchat_init() {
1262 + // Include all class files first
1263 + mxchat_include_classes();
1264 +
1265 + // Run update check (this also ensures tables exist)
1266 + mxchat_check_for_update();
1267 +
1268 + // CRITICAL: Ensure tables exist on admin pages (safety net)
1269 + add_action('admin_init', 'mxchat_ensure_tables_exist', 1);
1270 +
1271 + // Add fallback rate limit check
1272 + add_action('init', 'mxchat_check_fallback_rate_limits', 5);
1273 +
1274 + // Add migration notice hook
1275 + add_action('admin_notices', 'mxchat_show_migration_notice');
1276 +
1277 + // Initialize classes with error handling
1278 + try {
1279 + // Initialize admin classes
1280 + if (is_admin()) {
1281 + if (class_exists('MxChat_Knowledge_Manager')) {
1282 + $mxchat_knowledge_manager = new MxChat_Knowledge_Manager();
1283 +
1284 + if (class_exists('MxChat_Admin')) {
1285 + $mxchat_admin = new MxChat_Admin($mxchat_knowledge_manager);
1286 + }
1287 + }
1288 +
1289 + // Initialize meta box class
1290 + if (class_exists('MxChat_Meta_Box')) {
1291 + new MxChat_Meta_Box();
1292 + }
1293 +
1294 + }
1295 +
1296 + // Initialize content generator globally — it registers wp_head hook
1297 + // for frontend CSS injection, plus wp_ajax_ hooks for admin.
1298 + if (class_exists('MxChat_Content_Generator')) {
1299 + new MxChat_Content_Generator();
1300 + }
1301 +
1302 + // Initialize public classes
1303 + if (class_exists('MxChat_Public')) {
1304 + $mxchat_public = new MxChat_Public();
1305 + }
1306 +
1307 + if (class_exists('MxChat_Integrator')) {
1308 + global $mxchat_integrator;
1309 + $mxchat_integrator = new MxChat_Integrator();
1310 + }
1311 +
1312 + } catch (Exception $e) {
1313 + //error_log('MxChat initialization error: ' . $e->getMessage());
1314 +
1315 + // Show admin notice if there's an error
1316 + if (is_admin()) {
1317 + add_action('admin_notices', function() use ($e) {
1318 + echo '<div class="notice notice-error"><p>';
1319 + echo '<strong>MxChat Error:</strong> Plugin initialization failed. ';
1320 + echo 'Please check error logs or contact support. Error: ' . esc_html($e->getMessage());
1321 + echo '</p></div>';
1322 + });
1323 + }
1324 + }
1325 +}
1326 +
1327 +// Run initialization on plugins_loaded
1328 +add_action('plugins_loaded', 'mxchat_init');
1329 +
1330 +// Run migration check on admin init (for auto-updates without reactivation)
1331 +add_action('admin_init', 'mxchat_check_and_run_migrations');
1332 +
1333 +/**
1334 + * Check and run migrations on admin init
1335 + * This ensures migrations run even when plugin is auto-updated
1336 + */
1337 +function mxchat_check_and_run_migrations() {
1338 + // Only run in admin and not on every request
1339 + static $checked = false;
1340 + if ($checked) {
1341 + return;
1342 + }
1343 + $checked = true;
1344 +
1345 + mxchat_migrate_pinecone_roles_add_bot_id();
1346 + mxchat_migrate_add_content_type_column();
1347 + mxchat_migrate_add_translations_table();
1348 +}
1349 +
1350 +/**
1351 + * Migration: Create transcript translations table (v3.0.4)
1352 + * For users upgrading from versions before 3.0.4
1353 + */
1354 +function mxchat_migrate_add_translations_table() {
1355 + $migration_key = 'mxchat_translations_table_created';
1356 +
1357 + // Check if migration already ran
1358 + if (get_option($migration_key)) {
1359 + return;
1360 + }
1361 +
1362 + // Create the translations table
1363 + mxchat_create_translations_table();
1364 +
1365 + // Mark migration as complete
1366 + update_option($migration_key, '3.0.4');
1367 +}
1368 +
1369 +/**
1370 + * Migration: Update deprecated Gemini embedding model (v3.0.5)
1371 + * Updates gemini-embedding-exp-03-07 to gemini-embedding-001 for users who had it selected
1372 + */
1373 +function mxchat_migrate_gemini_embedding_model() {
1374 + $options = get_option('mxchat_options', array());
1375 +
1376 + if (isset($options['embedding_model']) && $options['embedding_model'] === 'gemini-embedding-exp-03-07') {
1377 + $options['embedding_model'] = 'gemini-embedding-001';
1378 + update_option('mxchat_options', $options);
1379 + }
1380 +}
1381 +
1382 +// Register activation hook
1383 +register_activation_hook(__FILE__, 'mxchat_activate');
1384 +
1385 +// Add cron schedule
1386 +add_filter('cron_schedules', function($schedules) {
1387 + $schedules['one_minute'] = array(
1388 + 'interval' => 60,
1389 + 'display' => 'Every Minute'
1390 + );
1391 + return $schedules;
1392 +});
1393 +
1394 +// Register deactivation hook
1395 +register_deactivation_hook(__FILE__, 'mxchat_deactivate');