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MxChat – AI Chatbot & Content Generation for WordPress / trunk
MxChat – AI Chatbot & Content Generation for WordPress vtrunk
3.2.21 3.2.20 3.2.19 3.2.18 3.2.17 3.2.16 3.2.15 3.2.14 3.2.12 3.2.13 3.2.11 3.2.10 3.2.9 3.2.8 3.2.7 3.2.6 3.2.5 3.2.4 3.2.3 3.2.2 3.2.1 2.0.3 2.0.4 2.0.5 2.0.6 All 152 releases
← All changes | mxchat-basic.php +841 -102 3.2.6trunk View file →
@@ -2,9 +2,9 @@
2 2 /**
3 3 * Plugin Name: MxChat
4 4 * Plugin URI: https://mxchat.ai/
5 5 * Description: AI chatbot for WordPress with OpenAI, Claude, xAI, DeepSeek, live agent, PDF uploads, WooCommerce, and training on website data.
6 - * Version: 3.2.6
6 + * Version: 3.2.21
7 7 * Author: MxChat
8 8 * Author URI: https://mxchat.ai
9 9 * License: GPLv2 or later
10 10 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
@@ -23,8 +23,16 @@
23 23
24 24 if (!defined('MXCHAT_VERSION')) {
25 25 $plugin_data = get_file_data(__FILE__, array('Version' => 'Version'), 'plugin');
26 26 $version = $plugin_data['Version'];
27 + // MXCHAT_BASE_VERSION: the plain header version, stable across requests even in
28 + // dev mode. Use it for anything PERSISTED or COMPARED (the stored
29 + // mxchat_plugin_version option and the migration gate in
30 + // mxchat_check_for_update). MXCHAT_VERSION keeps the time() suffix in dev for
31 + // ASSET cache-busting only — persisting the suffixed value made the version
32 + // comparison churn every request, re-running the full activation/migration
33 + // suite per page load on dev installs.
34 + define('MXCHAT_BASE_VERSION', $version);
27 35 if (MXCHAT_DEV_MODE) {
28 36 $version .= '.' . time();
29 37 }
30 38 define('MXCHAT_VERSION', $version);
@@ -29,8 +37,84 @@
29 37 }
30 38 define('MXCHAT_VERSION', $version);
31 39 }
32 40
41 +/**
42 + * Default confidence floor for the in-chat YouTube card, as a percentage
43 + * (plan-mxchat-20260813-f52492). Higher than the site-wide Similarity
44 + * Threshold default of 35 by design — see MxChat_Utils::video_embed_threshold().
45 + * Declared here so the gate, the admin field and the tests all read ONE number.
46 + */
47 +if (!defined('MXCHAT_VIDEO_EMBED_THRESHOLD_DEFAULT')) {
48 + define('MXCHAT_VIDEO_EMBED_THRESHOLD_DEFAULT', 55);
49 +}
50 +
51 +/**
52 + * One-time install stamp: records the plain version this site first ran, so
53 + * behavior defaults can differ between fresh installs and upgrades without
54 + * touching anyone's stored settings. Mirrors mxchat-mcp's 1.0.7 stamp shape
55 + * (plan 7b578e); first consumer is the "Strip unapproved links" default
56 + * (plan 58f8b4). Runs at init priority 1 — BEFORE initialize_default_options
57 + * (init 20) writes mxchat_options on a fresh site's first request, because
58 + * that option's pre-existing presence is how an upgrade is recognized.
59 + */
60 +function mxchat_stamp_install_version() {
61 + if (get_option('mxchat_installed_at_version', '') !== '') {
62 + return;
63 + }
64 + $existing = get_option('mxchat_options', false) !== false;
65 + $version = defined('MXCHAT_BASE_VERSION') ? MXCHAT_BASE_VERSION : '0.0.0';
66 + update_option('mxchat_installed_at_version', $existing ? 'legacy' : $version, false);
67 +}
68 +add_action('init', 'mxchat_stamp_install_version', 1);
69 +
70 +/**
71 + * Stamp-derived default for the "Strip unapproved links" toggle (plan 58f8b4,
72 + * option-c split of the old Citation Links conflation): 'on' only for installs
73 + * born at 3.2.20+. A missing or 'legacy' stamp means the site predates the
74 + * setting — keep 'off' so no existing site's links start vanishing on update.
75 + */
76 +function mxchat_strip_unapproved_links_default() {
77 + $stamp = get_option('mxchat_installed_at_version', '');
78 + if ($stamp === '' || $stamp === 'legacy') {
79 + return 'off';
80 + }
81 + return version_compare($stamp, '3.2.20', '>=') ? 'on' : 'off';
82 +}
83 +
84 +/**
85 + * Effective state of "Strip unapproved links": an explicitly saved option
86 + * always wins; until one exists the install-stamp default governs. Read via
87 + * a fresh get_option on purpose — the response URL guard runs late in the
88 + * request and must see a value saved moments earlier.
89 + */
90 +function mxchat_strip_unapproved_links_enabled() {
91 + $opts = get_option('mxchat_options', array());
92 + if (is_array($opts) && isset($opts['strip_unapproved_links_toggle'])) {
93 + return $opts['strip_unapproved_links_toggle'] === 'on';
94 + }
95 + return mxchat_strip_unapproved_links_default() === 'on';
96 +}
97 +
98 +/**
99 + * Honest, versioned User-Agent for MXChat remote-content ingestion fetches
100 + * (Knowledge Base PDF import, URL import, sitemap / website crawl).
101 + *
102 + * WAF rulesets (SiteGround/ModSecurity, Wordfence, Cloudflare managed rules)
103 + * flag stale spoofed-browser UAs as scrapers and return 403 — which silently
104 + * broke the single most common KB source: self-hosted media on the site's own
105 + * domain. A truthful crawler identifier is the industry norm for well-behaved
106 + * bots and lets a site owner allowlist "MXChatBot" in their WAF. Filterable so
107 + * a locked-down host can supply a different string without a code change.
108 + */
109 +if (!function_exists('mxchat_ingest_user_agent')) {
110 + function mxchat_ingest_user_agent() {
111 + $version = defined('MXCHAT_VERSION') ? MXCHAT_VERSION : '1.0';
112 + $ua = 'MXChatBot/' . $version . ' (+https://mxchat.ai/bot)';
113 + return apply_filters('mxchat_ingest_user_agent', $ua);
114 + }
115 +}
116 +
33 117 function mxchat_load_textdomain() {
34 118 $domain = 'mxchat';
35 119 $locale = determine_locale();
36 120
@@ -46,8 +130,84 @@
46 130 }
47 131 add_action('init', 'mxchat_load_textdomain');
48 132
49 133 /**
134 + * One-time migration: gemini-3-pro-preview was shut down by Google on March 9, 2026.
135 + * Existing installs with the dead ID get auto-remapped to gemini-3.1-pro-preview
136 + * (Google's official migration target) the first time admin_init fires after update.
137 + */
138 +add_action('admin_init', function () {
139 + if (get_option('mxchat_gemini_3_remap_done')) {
140 + return;
141 + }
142 + $opts = get_option('mxchat_options');
143 + if (is_array($opts) && isset($opts['model']) && $opts['model'] === 'gemini-3-pro-preview') {
144 + $opts['model'] = 'gemini-3.1-pro-preview';
145 + update_option('mxchat_options', $opts);
146 + }
147 + if (is_array($opts) && isset($opts['content_model']) && $opts['content_model'] === 'gemini-3-pro-preview') {
148 + $opts['content_model'] = 'gemini-3.1-pro-preview';
149 + update_option('mxchat_options', $opts);
150 + }
151 + update_option('mxchat_gemini_3_remap_done', 1);
152 +});
153 +
154 +/**
155 + * One-time migration: the Grok 2 family was retired by xAI (grok-2, grok-2-1212,
156 + * grok-2-latest, grok-2-vision-1212 all return 400 "Model not found"). Existing
157 + * installs with the dead ID get auto-remapped to grok-4-1-fast-non-reasoning
158 + * (modern, fast, broadly available) the first time admin_init fires after update.
159 + */
160 +add_action('admin_init', function () {
161 + if (get_option('mxchat_grok_2_remap_done')) {
162 + return;
163 + }
164 + $opts = get_option('mxchat_options');
165 + if (is_array($opts) && isset($opts['model']) && $opts['model'] === 'grok-2') {
166 + $opts['model'] = 'grok-4-1-fast-non-reasoning';
167 + update_option('mxchat_options', $opts);
168 + }
169 + if (is_array($opts) && isset($opts['content_model']) && $opts['content_model'] === 'grok-2') {
170 + $opts['content_model'] = 'grok-4-1-fast-non-reasoning';
171 + update_option('mxchat_options', $opts);
172 + }
173 + update_option('mxchat_grok_2_remap_done', 1);
174 +});
175 +
176 +/**
177 + * One-time migration: Anthropic retired the Claude 4 (2025-05-14) snapshots on
178 + * June 15, 2026 — claude-opus-4-20250514 and claude-sonnet-4-20250514 now return
179 + * an API error. Existing installs with a dead ID get auto-remapped to the current
180 + * equivalents Anthropic recommends (Opus 4.8 / Sonnet 4.6) the first time admin_init
181 + * fires after update. Mirrors the gemini-3-pro-preview / grok-2 rescues above.
182 + */
183 +add_action('admin_init', function () {
184 + if (get_option('mxchat_claude_4_retire_remap_done')) {
185 + return;
186 + }
187 + $map = array(
188 + 'claude-opus-4-20250514' => 'claude-opus-4-8',
189 + 'claude-sonnet-4-20250514' => 'claude-sonnet-4-6',
190 + );
191 + $opts = get_option('mxchat_options');
192 + if (is_array($opts)) {
193 + $changed = false;
194 + if (isset($opts['model']) && isset($map[$opts['model']])) {
195 + $opts['model'] = $map[$opts['model']];
196 + $changed = true;
197 + }
198 + if (isset($opts['content_model']) && isset($map[$opts['content_model']])) {
199 + $opts['content_model'] = $map[$opts['content_model']];
200 + $changed = true;
201 + }
202 + if ($changed) {
203 + update_option('mxchat_options', $opts);
204 + }
205 + }
206 + update_option('mxchat_claude_4_retire_remap_done', 1);
207 +});
208 +
209 +/**
50 210 * Exclude MxChat assets from caching plugin optimizations
51 211 *
52 212 * This prevents issues with WP Rocket, LiteSpeed Cache, Autoptimize, WP Super Cache,
53 213 * W3 Total Cache, SG Optimizer, and similar plugins that may break the chatbot by
@@ -306,21 +466,32 @@
306 466
307 467 // Include classes with error handling
308 468 function mxchat_include_classes() {
309 469 $class_files = array(
470 + 'includes/class-mxchat-model-catalog.php',
471 + 'includes/class-mxchat-model-liveness.php',
472 + 'includes/class-mxchat-session-store.php',
473 + 'includes/class-mxchat-live-agent-schedule.php',
474 + 'includes/class-mxchat-tool-registry.php',
310 475 'includes/class-mxchat-integrator.php',
311 476 'includes/class-mxchat-admin.php',
312 477 'includes/class-mxchat-public.php',
478 + 'includes/class-mxchat-block.php',
479 + 'includes/class-mxchat-elementor.php',
313 480 'includes/class-mxchat-utils.php',
314 481 'includes/class-mxchat-user.php',
482 + 'includes/class-mxchat-privacy.php',
315 483 'includes/class-mxchat-meta-box.php',
316 484 'includes/class-mxchat-chunker.php',
317 485 'includes/class-mxchat-word-handler.php',
318 486 'includes/class-mxchat-content-generator.php',
487 + 'includes/class-mxchat-cache-purge.php',
488 + 'includes/class-mxchat-editor-assistant.php',
319 489 'includes/class-rest-api.php',
320 490 'admin/class-ajax-handler.php',
321 491 'admin/class-pinecone-manager.php',
322 - 'admin/class-knowledge-manager.php'
492 + 'admin/class-knowledge-manager.php',
493 + 'admin/class-vectorstore-manager.php'
323 494 );
324 495
325 496 foreach ($class_files as $file) {
326 497 $file_path = plugin_dir_path(__FILE__) . $file;
@@ -330,8 +501,59 @@
330 501 //error_log('MxChat: Missing class file - ' . $file);
331 502 }
332 503 }
333 504
505 + // Register the native function-calling admin-post save handler (a41dee).
506 + if (class_exists('MxChat_Tool_Registry')) {
507 + MxChat_Tool_Registry::init();
508 + }
509 +
510 + // GDPR: register with WP's personal-data export/erase tools (b81e42).
511 + if (class_exists('MxChat_Privacy')) {
512 + MxChat_Privacy::init();
513 + }
514 +
515 + // Per-session state store: retention cron + the cron-independent
516 + // migration drain off admin_init (b64b77).
517 + if (class_exists('MxChat_Session_Store')) {
518 + MxChat_Session_Store::init();
519 + }
520 +
521 + // Daily model-liveness check + its warning notice (b65e8d). Read-only and
522 + // fail-open: one listing request per in-use provider per day, none at all
523 + // when no key is stored.
524 + if (class_exists('MxChat_Model_Liveness')) {
525 + MxChat_Model_Liveness::init();
526 + }
527 +
528 + // Gutenberg chatbot block (plan-95dd1e): a click-to-place wrapper over the
529 + // [mxchat_chatbot] shortcode. Registers on init; no-op below WP 5.0.
530 + if (class_exists('MxChat_Block')) {
531 + MxChat_Block::init();
532 + }
533 +
534 + // Elementor chatbot widget (plan-95dd1e part 2): registered ONLY inside
535 + // elementor/widgets/register (Elementor >= 3.5) — with Elementor absent or
536 + // older, the hook never fires and nothing further loads.
537 + if (class_exists('MxChat_Elementor')) {
538 + MxChat_Elementor::init();
539 + }
540 +
541 + // Editor Assistant — free, OFF-by-default block-editor AI actions (plan-8cb0cb).
542 + // init() wires REST + streaming AJAX + sidebar enqueue ONLY when the
543 + // mxchat_editor_assistant_enabled option is 'on'; otherwise zero footprint.
544 + if (class_exists('MxChat_Editor_Assistant')) {
545 + MxChat_Editor_Assistant::init();
546 + }
547 +
548 + // OpenAI Vector Store write path (plan-15b5c6): import/sync AJAX, the
549 + // import cron tick, the pending-delete sweeper, and the WP-CLI command
550 + // all register in the constructor. The sync itself only runs when the
551 + // sync toggle + store ID + OpenAI key are all present.
552 + if (class_exists('MxChat_Vectorstore_Manager')) {
553 + MxChat_Vectorstore_Manager::get_instance();
554 + }
555 +
334 556 // Admin pages that aren't classes (procedural include).
335 557 if (is_admin()) {
336 558 $admin_api_page = plugin_dir_path(__FILE__) . 'includes/admin-api-page.php';
337 559 if (file_exists($admin_api_page)) {
@@ -336,8 +558,18 @@
336 558 $admin_api_page = plugin_dir_path(__FILE__) . 'includes/admin-api-page.php';
337 559 if (file_exists($admin_api_page)) {
338 560 require_once $admin_api_page;
339 561 }
562 + // f7c7d4 renamed this file admin-dashboard-page.php → admin-onboarding-page.php.
563 + // The require MUST live here (admin bootstrap) and not just inside
564 + // mxchat_add_plugin_page() on the admin_menu hook — admin_menu does NOT
565 + // fire on admin-ajax.php requests, so the wizard's AJAX handlers
566 + // (plan-905439: mxchat_onboarding_kb_status / save_step / mark_step /
567 + // auto_graduate + the f7c7d4 dismiss handler) would never register.
568 + $admin_onboarding_page = plugin_dir_path(__FILE__) . 'includes/admin-onboarding-page.php';
569 + if (file_exists($admin_onboarding_page)) {
570 + require_once $admin_onboarding_page;
571 + }
340 572 }
341 573 }
342 574
343 575 /**
@@ -383,8 +615,26 @@
383 615 dbDelta($sql);
384 616 }
385 617
386 618 /**
619 + * Create the per-session state table (b64b77).
620 + *
621 + * Callable from the activation hook, which can run before plugins_loaded has
622 + * included the class files — so it loads the class itself when needed.
623 + */
624 +function mxchat_create_sessions_table() {
625 + if (!class_exists('MxChat_Session_Store')) {
626 + $path = plugin_dir_path(__FILE__) . 'includes/class-mxchat-session-store.php';
627 + if (!file_exists($path)) {
628 + return false;
629 + }
630 + require_once $path;
631 + }
632 +
633 + return MxChat_Session_Store::create_table();
634 +}
635 +
636 +/**
387 637 * FIXED: Robust table creation and column management
388 638 */
389 639 function mxchat_create_chat_transcripts_table() {
390 640 global $wpdb;
@@ -695,8 +945,66 @@
695 945 }
696 946 }
697 947
698 948 /**
949 + * 3.2.20: One-time backfill of the caee10 catalog usage-hint defaults
950 + * (plan 64c1ad). persist() writes usage_hint for EVERY shown tool on every
951 + * autosave — as '' when the box is untouched — and resolve_tool_setting()
952 + * seeds a catalog default_hint ONLY onto an ABSENT key. So any install that
953 + * saved the AI Tools screen before 3.2.20 holds '' everywhere and the shipped
954 + * defaults can never reach it. On an upgrade from < 3.2.20 an empty stored
955 + * hint cannot be a deliberate clear of a rendered default (those builds never
956 + * rendered one), so seeding is safe. From 3.2.20 on, empty means the owner
957 + * cleared a visible default and is respected — this never runs again (version
958 + * gate + its own marker, deliberately not caee10's flag).
959 + *
960 + * Never touched: entries with owner text, legacy bare-bool entries and
961 + * absent-key entries (both already resolve to the default at read time), and
962 + * tools whose catalog entry ships no default_hint.
963 + */
964 +function mxchat_backfill_tool_hint_defaults() {
965 + if (get_option('mxchat_tool_hint_backfill_64c1ad') === '1') {
966 + return;
967 + }
968 +
969 + if (class_exists('MxChat_Tool_Registry')) {
970 + $map = get_option('mxchat_function_calling_tools', array());
971 + if (is_array($map) && !empty($map)) {
972 + $defaults = array();
973 + foreach (MxChat_Tool_Registry::core_tool_catalog() as $fn => $meta) {
974 + if (!empty($meta['default_hint'])) {
975 + $defaults[$fn] = (string) $meta['default_hint'];
976 + }
977 + }
978 +
979 + $changed = false;
980 + foreach ($map as $fn => $entry) {
981 + if (!isset($defaults[$fn])) {
982 + continue; // no catalog default — nothing to seed
983 + }
984 + if (!is_array($entry)) {
985 + continue; // legacy bare bool: key absent, resolves to the default already
986 + }
987 + if (!array_key_exists('usage_hint', $entry)) {
988 + continue; // absent key gets the default at read time — must stay absent
989 + }
990 + if (trim((string) $entry['usage_hint']) !== '') {
991 + continue; // owner text — never touch
992 + }
993 + $map[$fn]['usage_hint'] = $defaults[$fn];
994 + $changed = true;
995 + }
996 +
997 + if ($changed) {
998 + update_option('mxchat_function_calling_tools', $map);
999 + }
1000 + }
1001 + }
1002 +
1003 + update_option('mxchat_tool_hint_backfill_64c1ad', '1', false);
1004 +}
1005 +
1006 +/**
699 1007 * 2.5.2: Create queue processing tables for reliable background processing
700 1008 */
701 1009 function mxchat_create_queue_tables() {
702 1010 global $wpdb;
@@ -794,8 +1102,41 @@
794 1102 dbDelta($sql);
795 1103 }
796 1104
797 1105 /**
1106 + * Create the OpenAI Vector Store file-mapping table (v3.2.20, plan 15b5c6).
1107 + * One row per mirrored KB entry: which store, which bot, which OpenAI file id,
1108 + * and a hash of the uploaded body for change detection. Vector store files are
1109 + * not patchable in place — without this mapping an update cannot find its
1110 + * predecessor, and the store silently accumulates stale duplicates.
1111 + * status: 'live' (serving) or 'pending_delete' (condemned, swept later).
1112 + */
1113 +function mxchat_create_vectorstore_files_table() {
1114 + global $wpdb;
1115 + $charset_collate = $wpdb->get_charset_collate();
1116 +
1117 + $table_name = $wpdb->prefix . 'mxchat_vectorstore_files';
1118 + $sql = "CREATE TABLE $table_name (
1119 + id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
1120 + store_id varchar(64) NOT NULL,
1121 + bot_id varchar(64) NOT NULL DEFAULT 'default',
1122 + entry_key char(32) NOT NULL,
1123 + source_url text,
1124 + file_id varchar(64) NOT NULL,
1125 + content_hash char(32) NOT NULL DEFAULT '',
1126 + status varchar(20) NOT NULL DEFAULT 'live',
1127 + last_error text,
1128 + updated_at datetime DEFAULT NULL,
1129 + PRIMARY KEY (id),
1130 + KEY store_entry (store_id, bot_id, entry_key, status),
1131 + KEY status (status)
1132 + ) $charset_collate;";
1133 +
1134 + require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
1135 + dbDelta($sql);
1136 +}
1137 +
1138 +/**
798 1139 * 2.5.2: Fix URL column size to support long URLs (especially with UTF-8 encoding)
799 1140 * This fixes "url, source_url. The supplied values may be too long" errors
800 1141 */
801 1142 function mxchat_fix_url_column_size() {
@@ -839,53 +1180,45 @@
839 1180 if (!isset($options['model'])) {
840 1181 return;
841 1182 }
842 1183
843 - $current_model = $options['model'];
844 -
845 - // Migrate deprecated Claude models to Claude Opus 4.6 (recommended replacement per Anthropic)
846 - $deprecated_claude_models = array(
847 - 'claude-3-5-sonnet-20240620', // Retired Oct 28, 2025
848 - 'claude-3-5-sonnet-20241022', // Retired Oct 28, 2025
849 - 'claude-3-7-sonnet-20250219', // Retiring Feb 19, 2026
850 - 'claude-3-opus-20240229', // Retired Jan 5, 2026
851 - 'claude-3-sonnet-20240229', // Legacy
852 - 'claude-3-haiku-20240307', // Legacy
853 - );
854 - if (in_array($current_model, $deprecated_claude_models, true)) {
855 - $options['model'] = 'claude-opus-4-6';
856 - $migrated = true;
857 - $migration_message = sprintf(
858 - 'Your chatbot model has been automatically updated from %s to Claude Opus 4.6 due to Anthropic deprecating older Claude models.',
859 - $current_model
860 - );
1184 + // The retired-id → replacement mapping lives in ONE place:
1185 + // MxChat_Model_Catalog::retired_model_map() (plan 202df5). This function
1186 + // and every add-on that stores model ids consume that map — do not add a
1187 + // deprecation list here again.
1188 + if (!class_exists('MxChat_Model_Catalog') || !method_exists('MxChat_Model_Catalog', 'retired_model_map')) {
1189 + return; // catalog not loaded (defensive) — the next admin load retries
861 1190 }
1191 + $map = MxChat_Model_Catalog::retired_model_map();
862 1192
863 - // Migrate deprecated Claude Haiku 3.5 to Claude Haiku 4.5
864 - if ($current_model === 'claude-3-5-haiku-20241022') {
865 - $options['model'] = 'claude-haiku-4-5-20251001';
1193 + $current_model = $options['model'];
1194 + if (isset($map[$current_model])) {
1195 + $entry = $map[$current_model];
1196 + $options['model'] = $entry['to'];
866 1197 $migrated = true;
867 - $migration_message = 'Your chatbot model has been automatically updated from Claude Haiku 3.5 to Claude Haiku 4.5 due to Anthropic deprecating the older model.';
868 - }
869 -
870 - // Migrate deprecated GPT-4 series and GPT-3.5 Turbo to GPT-5.1 Chat Latest
871 - if (in_array($current_model, array('gpt-4o', 'gpt-4.1-2025-04-14', 'gpt-4-turbo', 'gpt-4', 'gpt-3.5-turbo'), true)) {
872 - $options['model'] = 'gpt-5.1-chat-latest';
873 - $migrated = true;
874 1198 $migration_message = sprintf(
875 - 'Your chatbot model has been automatically updated from %s to GPT-5.1 Chat Latest due to OpenAI deprecating older models.',
876 - $current_model
1199 + 'Your chatbot model has been automatically updated from %s to %s %s.',
1200 + $current_model,
1201 + $entry['label'],
1202 + $entry['reason']
877 1203 );
878 1204 }
879 1205
880 - // Migrate deprecated GPT-4o Mini and GPT-4.1 Mini to GPT-5 Mini
881 - if (in_array($current_model, array('gpt-4o-mini', 'gpt-4.1-mini'), true)) {
882 - $options['model'] = 'gpt-5-mini';
1206 + // The content generator has its own model option — the same map applies.
1207 + // (Pre-202df5 this branch covered only the two gpt-5.x-chat-latest aliases;
1208 + // it now covers every retired id, so e.g. a content model stranded on a
1209 + // retired Claude id is rescued the same way the chat model is.)
1210 + if (isset($options['content_model']) && isset($map[$options['content_model']])) {
1211 + $old_content_model = $options['content_model'];
1212 + $entry = $map[$old_content_model];
1213 + $options['content_model'] = $entry['to'];
883 1214 $migrated = true;
884 - $migration_message = sprintf(
885 - 'Your chatbot model has been automatically updated from %s to GPT-5 Mini due to OpenAI deprecating GPT-4 series models.',
886 - $current_model
887 - );
1215 + $migration_message = trim($migration_message . ' ' . sprintf(
1216 + 'Your content generation model has also been automatically updated from %s to %s %s.',
1217 + $old_content_model,
1218 + $entry['label'],
1219 + $entry['reason']
1220 + ));
888 1221 }
889 1222
890 1223 if ($migrated) {
891 1224 update_option('mxchat_options', $options);
@@ -912,8 +1245,100 @@
912 1245 delete_option('mxchat_model_migration_message');
913 1246 }
914 1247 }
915 1248
1249 +/**
1250 + * One-time recommendation on EXISTING installs (stamp 'legacy') that the new
1251 + * "Strip unapproved links" guard exists and is worth turning on (plan 58f8b4).
1252 + * Fresh 3.2.20+ installs default it on and never see this. Shown only on
1253 + * MxChat admin pages, gone for good once dismissed or once the site saves an
1254 + * explicit value for the toggle either way.
1255 + */
1256 +function mxchat_show_strip_links_notice() {
1257 + if (!current_user_can('manage_options')) {
1258 + return;
1259 + }
1260 + $page = isset($_GET['page']) ? sanitize_key($_GET['page']) : '';
1261 + if (strpos($page, 'mxchat') !== 0) {
1262 + return;
1263 + }
1264 + if (get_option('mxchat_strip_links_notice_dismissed', '') === '1') {
1265 + return;
1266 + }
1267 + if (get_option('mxchat_installed_at_version', '') !== 'legacy') {
1268 + return;
1269 + }
1270 + $opts = get_option('mxchat_options', array());
1271 + if (is_array($opts) && isset($opts['strip_unapproved_links_toggle'])) {
1272 + return; // The site already made its choice — stop recommending.
1273 + }
1274 + $dismiss_url = wp_nonce_url(
1275 + admin_url('admin-post.php?action=mxchat_dismiss_strip_links_notice'),
1276 + 'mxchat_dismiss_strip_links_notice'
1277 + );
1278 + ?>
1279 + <div class="notice notice-info">
1280 + <p>
1281 + <strong><?php esc_html_e('MxChat: new link protection available', 'mxchat'); ?></strong><br>
1282 + <?php esc_html_e('The new "Strip Unapproved Links" setting removes links the AI invents from its answers even when Citation Links is off — links to real pages on your site and links your integrations return are always kept. It is off on existing sites so nothing changes without you; we recommend turning it on under MxChat → Settings → Chatbot Behavior.', 'mxchat'); ?>
1283 + <a href="<?php echo esc_url($dismiss_url); ?>"><?php esc_html_e('Dismiss', 'mxchat'); ?></a>
1284 + </p>
1285 + </div>
1286 + <?php
1287 +}
1288 +add_action('admin_notices', 'mxchat_show_strip_links_notice');
1289 +
1290 +/** Dismiss handler for the strip-links recommendation notice (plan 58f8b4). */
1291 +function mxchat_dismiss_strip_links_notice() {
1292 + if (!current_user_can('manage_options')) {
1293 + wp_die(esc_html__('Insufficient permissions.', 'mxchat'), '', array('response' => 403));
1294 + }
1295 + check_admin_referer('mxchat_dismiss_strip_links_notice');
1296 + update_option('mxchat_strip_links_notice_dismissed', '1', false);
1297 + $referer = wp_get_referer();
1298 + wp_safe_redirect($referer ? $referer : admin_url('admin.php?page=mxchat-max'));
1299 + exit;
1300 +}
1301 +add_action('admin_post_mxchat_dismiss_strip_links_notice', 'mxchat_dismiss_strip_links_notice');
1302 +
1303 +/**
1304 + * Persistent admin notice when the provider rejected the configured model
1305 + * (model_not_found / no access). Set by mxchat_friendly_chat_error() in the
1306 + * integrator whenever a chat request fails on a model-access error — including
1307 + * requests from anonymous visitors, which is the case that otherwise stays
1308 + * invisible to the site owner for weeks (plan e46b8f).
1309 + *
1310 + * Deleted after render so it re-arms on the next failed chat: the notice keeps
1311 + * reappearing until the model is fixed, then stops on its own.
1312 + */
1313 +function mxchat_show_model_access_notice() {
1314 + if (!current_user_can('manage_options')) {
1315 + return;
1316 + }
1317 + $notice = get_option('mxchat_model_access_notice');
1318 + if (!is_array($notice) || empty($notice['model'])) {
1319 + return;
1320 + }
1321 + $settings_url = admin_url('admin.php?page=mxchat-max');
1322 + ?>
1323 + <div class="notice notice-error is-dismissible">
1324 + <p>
1325 + <strong><?php esc_html_e('MxChat: your AI model is being rejected by the provider', 'mxchat'); ?></strong><br>
1326 + <?php
1327 + printf(
1328 + /* translators: 1: model id, 2: provider name */
1329 + esc_html__('Chat requests using the model "%1$s" are failing because %2$s reports it as unavailable on your API key (it may have been retired). Visitors may be seeing errors instead of replies.', 'mxchat'),
1330 + esc_html($notice['model']),
1331 + esc_html(!empty($notice['provider']) ? $notice['provider'] : __('the AI provider', 'mxchat'))
1332 + );
1333 + ?>
1334 + <a href="<?php echo esc_url($settings_url); ?>"><?php esc_html_e('Choose a different model in MxChat Settings', 'mxchat'); ?></a>
1335 + </p>
1336 + </div>
1337 + <?php
1338 + delete_option('mxchat_model_access_notice');
1339 +}
1340 +
916 1341 function mxchat_activate() {
917 1342 global $wpdb;
918 1343 $charset_collate = $wpdb->get_charset_collate();
919 1344
@@ -921,8 +1346,12 @@
921 1346
922 1347 // Create chat transcripts table with improved function
923 1348 mxchat_create_chat_transcripts_table();
924 1349
1350 + // Per-session state table (b64b77). Activation can run before
1351 + // plugins_loaded has included the class files, so require it directly.
1352 + mxchat_create_sessions_table();
1353 +
925 1354 // System Prompt Content Table - UPDATED: Use TEXT for url and source_url columns
926 1355 $system_prompt_table = $wpdb->prefix . 'mxchat_system_prompt_content';
927 1356 $sql_system_prompt = "CREATE TABLE $system_prompt_table (
928 1357 id MEDIUMINT(9) NOT NULL AUTO_INCREMENT,
@@ -984,8 +1413,11 @@
984 1413
985 1414 // Create per-session satisfaction ratings table (v3.2.6)
986 1415 mxchat_create_session_ratings_table();
987 1416
1417 + // Create Vector Store file-mapping table (v3.2.20, plan 15b5c6)
1418 + mxchat_create_vectorstore_files_table();
1419 +
988 1420 // Ensure additional columns in system prompt table
989 1421 $existing_system_columns = $wpdb->get_results("SHOW COLUMNS FROM $system_prompt_table");
990 1422 if (!empty($existing_system_columns)) {
991 1423 $existing_system_column_names = array_column($existing_system_columns, 'Field');
@@ -1034,10 +1466,11 @@
1034 1466
1035 1467 // Setup cron jobs
1036 1468 mxchat_setup_cron_jobs();
1037 1469
1038 - // Update version
1039 - update_option('mxchat_plugin_version', MXCHAT_VERSION);
1470 + // Update version (stable base version — never the dev time()-suffixed one,
1471 + // or the check_for_update comparison would churn every request)
1472 + update_option('mxchat_plugin_version', MXCHAT_BASE_VERSION);
1040 1473
1041 1474 //error_log("MxChat: Activation function completed");
1042 1475 }
1043 1476
@@ -1052,23 +1485,29 @@
1052 1485 if (defined('DISABLE_WP_CRON') && DISABLE_WP_CRON) {
1053 1486 // Set flag to use fallback system
1054 1487 update_option('mxchat_use_fallback_rate_limits', true);
1055 1488 update_option('mxchat_next_rate_limit_check', time() + 3600);
1056 - return;
1057 - }
1058 -
1059 - // Schedule the rate limit reset cron job
1060 - $result = wp_schedule_event(time() + 300, 'hourly', 'mxchat_reset_rate_limits');
1061 -
1062 - if ($result === false) {
1063 - // Fallback if scheduling fails
1064 - update_option('mxchat_use_fallback_rate_limits', true);
1065 - update_option('mxchat_next_rate_limit_check', time() + 3600);
1489 + // Deliberately NO early return (plan-bc08a6): transcript cleanup below
1490 + // must still be scheduled. DISABLE_WP_CRON only changes HOW cron events
1491 + // execute (a server-side runner hitting wp-cron.php instead of loopback
1492 + // spawns) — scheduling still just writes the cron option. The old early
1493 + // return here meant a deactivate/reactivate cycle on a DISABLE_WP_CRON
1494 + // site permanently lost the transcript cleanup event while the retention
1495 + // setting still claimed to be active.
1066 1496 } else {
1067 - // Clear fallback flags if cron scheduling succeeded
1068 - delete_option('mxchat_use_fallback_rate_limits');
1497 + // Schedule the rate limit reset cron job
1498 + $result = wp_schedule_event(time() + 300, 'hourly', 'mxchat_reset_rate_limits');
1499 +
1500 + if ($result === false) {
1501 + // Fallback if scheduling fails
1502 + update_option('mxchat_use_fallback_rate_limits', true);
1503 + update_option('mxchat_next_rate_limit_check', time() + 3600);
1504 + } else {
1505 + // Clear fallback flags if cron scheduling succeeded
1506 + delete_option('mxchat_use_fallback_rate_limits');
1507 + }
1069 1508 }
1070 -
1509 +
1071 1510 // Schedule transcript cleanup if configured (bucket dropdown OR custom retention-days > 0)
1072 1511 $transcript_options = get_option('mxchat_transcripts_options', array());
1073 1512 $cleanup_interval = isset($transcript_options['mxchat_auto_delete_transcripts']) ? $transcript_options['mxchat_auto_delete_transcripts'] : 'never';
1074 1513 $custom_retention = isset($transcript_options['mxchat_retention_days']) ? (int) $transcript_options['mxchat_retention_days'] : 0;
@@ -1090,8 +1529,9 @@
1090 1529 // Clear scheduled cron jobs
1091 1530 wp_clear_scheduled_hook('mxchat_reset_rate_limits');
1092 1531 wp_clear_scheduled_hook('mxchat_cleanup_old_transcripts');
1093 1532 wp_clear_scheduled_hook('mxchat_send_delayed_transcript');
1533 + wp_clear_scheduled_hook('mxchat_model_liveness_check');
1094 1534
1095 1535 // Clear fallback options
1096 1536 delete_option('mxchat_use_fallback_rate_limits');
1097 1537 delete_option('mxchat_next_rate_limit_check');
@@ -1111,17 +1551,25 @@
1111 1551 return;
1112 1552 }
1113 1553
1114 1554 $next_check = get_option('mxchat_next_rate_limit_check', 0);
1115 -
1555 +
1116 1556 if (time() >= $next_check) {
1117 - // Only run reset if the MxChat_Integrator class exists
1118 - if (class_exists('MxChat_Integrator')) {
1119 - $integrator = new MxChat_Integrator();
1120 - if (method_exists($integrator, 'mxchat_reset_rate_limits')) {
1121 - $integrator->mxchat_reset_rate_limits();
1122 - update_option('mxchat_next_rate_limit_check', time() + 3600);
1123 - }
1557 + // Reuse the bootstrap's integrator — mxchat_init() creates the global on
1558 + // plugins_loaded (before this init-priority-5 callback), so it's always set
1559 + // here. Constructing a second MxChat_Integrator just to call one method
1560 + // re-registers every hook the plugin has (ajax pairs, wp_footer loader,
1561 + // rest_api_init, admin_init guard) on a duplicate instance for the rest of
1562 + // the request. Defensive construction only if the global is somehow unset.
1563 + // NOTE: MxChat_Integrator::check_fallback_rate_limits() is a second
1564 + // implementation of this same check — if either changes, change both.
1565 + global $mxchat_integrator;
1566 + $integrator = ($mxchat_integrator instanceof MxChat_Integrator)
1567 + ? $mxchat_integrator
1568 + : (class_exists('MxChat_Integrator') ? new MxChat_Integrator() : null);
1569 + if ($integrator && method_exists($integrator, 'mxchat_reset_rate_limits')) {
1570 + $integrator->mxchat_reset_rate_limits();
1571 + update_option('mxchat_next_rate_limit_check', time() + 3600);
1124 1572 }
1125 1573 }
1126 1574 }
1127 1575
@@ -1133,9 +1581,9 @@
1133 1581 global $wpdb;
1134 1582
1135 1583 try {
1136 1584 $current_version = get_option('mxchat_plugin_version', '0.0.0');
1137 - $plugin_version = MXCHAT_VERSION;
1585 + $plugin_version = MXCHAT_BASE_VERSION;
1138 1586
1139 1587 // Always ensure critical tables exist (even if version matches)
1140 1588 // This handles manual table deletion or fresh installs
1141 1589 $chat_table = $wpdb->prefix . 'mxchat_chat_transcripts';
@@ -1140,12 +1588,16 @@
1140 1588 // This handles manual table deletion or fresh installs
1141 1589 $chat_table = $wpdb->prefix . 'mxchat_chat_transcripts';
1142 1590 $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
1143 1591
1592 + $sessions_table = $wpdb->prefix . 'mxchat_sessions';
1593 +
1144 1594 $chat_exists = $wpdb->get_var("SHOW TABLES LIKE '$chat_table'") === $chat_table;
1145 1595 $queue_exists = $wpdb->get_var("SHOW TABLES LIKE '$queue_table'") === $queue_table;
1146 -
1147 - if (!$chat_exists || !$queue_exists) {
1596 + $sessions_exists = get_option('mxchat_session_store_ready') === '1'
1597 + || $wpdb->get_var("SHOW TABLES LIKE '$sessions_table'") === $sessions_table;
1598 +
1599 + if (!$chat_exists || !$queue_exists || !$sessions_exists) {
1148 1600 //error_log("MxChat: Critical tables missing, running activation");
1149 1601 mxchat_activate();
1150 1602 }
1151 1603
@@ -1214,8 +1666,55 @@
1214 1666 if (version_compare($current_version, '3.2.4', '<')) {
1215 1667 mxchat_backfill_active_embedding_model();
1216 1668 }
1217 1669
1670 + // 3.2.15: Migrate retired DeepSeek ids (deepseek-chat / deepseek-reasoner
1671 + // were shut off at the vendor on 2026-07-24). The function is idempotent —
1672 + // it only rewrites models on its deprecation lists.
1673 + if (version_compare($current_version, '3.2.15', '<')) {
1674 + mxchat_migrate_deprecated_models();
1675 + }
1676 +
1677 + // 3.2.16: Migrate OpenAI ids retiring 2026-08-10 (gpt-5.1-chat-latest /
1678 + // gpt-5.3-chat-latest → gpt-5.6-sol per OpenAI's deprecations page).
1679 + // Idempotent — only rewrites models on the deprecation lists (e46b8f).
1680 + if (version_compare($current_version, '3.2.16', '<')) {
1681 + mxchat_migrate_deprecated_models();
1682 + }
1683 +
1684 + // 3.2.17: Credential options must not autoload (af2400) — the two
1685 + // Pinecone-secret-holding rows were in alloptions, i.e. read into
1686 + // memory on every request including anonymous page views. Idempotent.
1687 + // Also carry the import modal's remembered ACF→PDF checkbox state
1688 + // into the new install-level option (11720c).
1689 + if (version_compare($current_version, '3.2.17', '<')) {
1690 + mxchat_fix_credential_option_autoload();
1691 + mxchat_migrate_acf_pdf_extraction_option();
1692 + }
1693 +
1694 + // 3.2.19: Claude Opus 4.1 retired Aug 5, 2026 — auto-move stranded
1695 + // sites (and the older tiers on the migration's lists) per the
1696 + // changelog's promise. Idempotent — only rewrites models on the
1697 + // deprecation lists. Without a gate at this release's version,
1698 + // nothing calls the migration for 3.2.18 upgraders (plan a5a598;
1699 + // the gate value must equal the version this block ships in).
1700 + if (version_compare($current_version, '3.2.19', '<')) {
1701 + mxchat_migrate_deprecated_models();
1702 + }
1703 +
1704 + // 3.2.20: Seed the caee10 usage-hint defaults onto tool entries a
1705 + // pre-3.2.20 autosave stamped with '' (plan 64c1ad). The gate value
1706 + // equals the version this block ships in (a5a598 rule); the
1707 + // function carries its own one-time marker on top.
1708 + // Also re-run the deprecated-models migration: 202df5 widened it to
1709 + // rescue a content_model stranded on ANY retired id (previously
1710 + // only the two gpt-5.x-chat-latest aliases). Idempotent — only
1711 + // rewrites models on the catalog's retired_model_map().
1712 + if (version_compare($current_version, '3.2.20', '<')) {
1713 + mxchat_backfill_tool_hint_defaults();
1714 + mxchat_migrate_deprecated_models();
1715 + }
1716 +
1218 1717 // Run full activation to ensure everything is up to date
1219 1718 mxchat_activate();
1220 1719
1221 1720 // Run migration functions
@@ -1220,12 +1719,11 @@
1220 1719
1221 1720 // Run migration functions
1222 1721 mxchat_migrate_live_agent_status();
1223 1722
1224 - // Add the cleanup function for version 2.1.8
1225 - if (version_compare($current_version, '2.1.8', '<')) {
1226 - $deleted = mxchat_cleanup_orphaned_chat_history();
1227 - }
1723 + // (The 2.1.8 orphaned-history reconciliation sweep is gone —
1724 + // 3.2.19's mxchat_history_backlog_* drain supersedes it, and it
1725 + // self-arms without a version gate: plan 839c4c.)
1228 1726
1229 1727 // Update version LAST
1230 1728 update_option('mxchat_plugin_version', $plugin_version);
1231 1729
@@ -1238,8 +1736,170 @@
1238 1736 }
1239 1737 }
1240 1738
1241 1739 /**
1740 + * Credential options must never enter the autoloaded alloptions set.
1741 + * mxchat_prompts_options and mxchat_pinecone_addon_options can hold the
1742 + * Pinecone API secret; mxchat_options already stores its keys with autoload
1743 + * off and these two must match it. The filter covers every future
1744 + * add_option()/update_option() that creates the row — Settings API saves
1745 + * through options.php and WP-CLI included — on WP 6.6+; older cores are
1746 + * covered by the explicit autoload arguments at the plugin's own write
1747 + * sites plus the one-time migration below.
1748 + */
1749 +add_filter('wp_default_autoload_value', 'mxchat_credential_option_autoload_value', 10, 2);
1750 +function mxchat_credential_option_autoload_value($autoload, $option) {
1751 + if (in_array($option, array('mxchat_prompts_options', 'mxchat_pinecone_addon_options'), true)) {
1752 + return false;
1753 + }
1754 + return $autoload;
1755 +}
1756 +
1757 +/**
1758 + * One-time upgrade migration: flip the autoload flag on credential option
1759 + * rows that existing installs are already carrying autoloaded. Includes
1760 + * mxchat_adv_api_token (Advanced Content bearer token) — harmless no-op
1761 + * when that add-on is not installed, since missing rows simply don't match.
1762 + */
1763 +function mxchat_fix_credential_option_autoload() {
1764 + $keys = array('mxchat_prompts_options', 'mxchat_pinecone_addon_options', 'mxchat_adv_api_token');
1765 + if (function_exists('wp_set_option_autoload_values')) {
1766 + wp_set_option_autoload_values(array_fill_keys($keys, false));
1767 + return;
1768 + }
1769 + // Pre-WP-6.4 fallback: direct flip + cache invalidation.
1770 + global $wpdb;
1771 + $placeholders = implode(',', array_fill(0, count($keys), '%s'));
1772 + $wpdb->query($wpdb->prepare("UPDATE {$wpdb->options} SET autoload = 'no' WHERE option_name IN ($placeholders)", $keys));
1773 + wp_cache_delete('alloptions', 'options');
1774 + foreach ($keys as $key) {
1775 + wp_cache_delete($key, 'options');
1776 + }
1777 +}
1778 +
1779 +/**
1780 + * One-time carry of the import modal's remembered ACF→PDF checkbox state
1781 + * (mxchat_options['acf_pdf_extract_default'], written per-import until 3.2.16)
1782 + * into the new install-level option mxchat_acf_pdf_extraction (plan 11720c).
1783 + * Fresh installs and installs that never touched the checkbox default OFF,
1784 + * matching the setting's own "recommended only if…" guidance.
1785 + */
1786 +function mxchat_migrate_acf_pdf_extraction_option() {
1787 + if (get_option('mxchat_acf_pdf_extraction', null) !== null) {
1788 + return; // already set — never overwrite an owner's choice
1789 + }
1790 + $mxchat_options = get_option('mxchat_options', array());
1791 + if (is_array($mxchat_options) && array_key_exists('acf_pdf_extract_default', $mxchat_options)) {
1792 + update_option('mxchat_acf_pdf_extraction', !empty($mxchat_options['acf_pdf_extract_default']) ? '1' : '0', false);
1793 + unset($mxchat_options['acf_pdf_extract_default']);
1794 + update_option('mxchat_options', $mxchat_options);
1795 + }
1796 +}
1797 +
1798 +/**
1799 + * One-time migration of mxchat_acf_excluded_fields from field NAMES to field
1800 + * KEYS (plan 30e81f). Names are not unique across ACF groups, so two fields
1801 + * named the same in different groups shared one toggle, one saved state, and
1802 + * one exclusion — and the save-on-exit beacon could revert a save through the
1803 + * twin. Keys are unique; everything now runs on them.
1804 + *
1805 + * MIGRATION DIRECTION IS DELIBERATE: one stored name can match several keys —
1806 + * exclude EVERY one of them. The UI describes these as "sensitive or
1807 + * irrelevant fields"; an under-migration would silently start feeding a
1808 + * previously-excluded sensitive field into embeddings sent to a third-party
1809 + * provider. Over-excluding is visible in the UI and costs some retrieval
1810 + * quality; under-excluding is a silent privacy regression.
1811 + *
1812 + * Self-arming on acf/init (NOT the version-gated upgrade block): resolving
1813 + * names needs ACF fully booted with local JSON/PHP groups registered, and if
1814 + * ACF is deactivated at upgrade time the migration simply waits for the next
1815 + * load with ACF active. Until it runs, stored names keep working — every
1816 + * exclusion read site honors legacy name entries alongside keys. A name that
1817 + * matches no current key is KEPT (its group may be temporarily inactive), and
1818 + * the per-field include path lazily converts it if it ever resolves again.
1819 + */
1820 +function mxchat_migrate_acf_exclusions_to_keys() {
1821 + if (get_option('mxchat_acf_exclusions_migrated', '') === '1') {
1822 + return;
1823 + }
1824 + $stored = get_option('mxchat_acf_excluded_fields', array());
1825 + if (!is_array($stored) || empty($stored)) {
1826 + update_option('mxchat_acf_exclusions_migrated', '1', false);
1827 + return;
1828 + }
1829 + if (!function_exists('acf_get_field_groups') || !function_exists('acf_get_fields')) {
1830 + return; // acf/init fired without the API? Bail; retry next load.
1831 + }
1832 +
1833 + // Map every current top-level field: name => [keys], and the set of keys.
1834 + $name_to_keys = array();
1835 + $current_keys = array();
1836 + foreach (acf_get_field_groups() as $group) {
1837 + $group_fields = acf_get_fields($group['key']);
1838 + if (empty($group_fields)) {
1839 + continue;
1840 + }
1841 + foreach ($group_fields as $field) {
1842 + if (empty($field['key']) || !isset($field['name'])) {
1843 + continue;
1844 + }
1845 + $current_keys[$field['key']] = true;
1846 + $name_to_keys[$field['name']][] = $field['key'];
1847 + }
1848 + }
1849 +
1850 + $migrated = array();
1851 + $converted = 0;
1852 + foreach ($stored as $entry) {
1853 + if (!is_string($entry) || $entry === '') {
1854 + continue;
1855 + }
1856 + if (isset($current_keys[$entry])) {
1857 + $migrated[] = $entry; // already a live key
1858 + } elseif (isset($name_to_keys[$entry])) {
1859 + foreach ($name_to_keys[$entry] as $key) {
1860 + $migrated[] = $key; // every key wearing this name — fail toward more exclusion
1861 + }
1862 + $converted++;
1863 + } else {
1864 + $migrated[] = $entry; // unresolved — keep; still honored by name everywhere
1865 + }
1866 + }
1867 + $migrated = array_values(array_unique($migrated));
1868 +
1869 + update_option('mxchat_acf_excluded_fields', $migrated);
1870 + update_option('mxchat_acf_exclusions_migrated', '1', false);
1871 + if ($converted > 0) {
1872 + update_option('mxchat_acf_exclusions_migrated_notice', '1', false);
1873 + }
1874 +}
1875 +add_action('acf/init', 'mxchat_migrate_acf_exclusions_to_keys', 20);
1876 +
1877 +/**
1878 + * One-time notice after the ACF exclusion migration actually converted
1879 + * name entries — the settings are worth a review, especially where one name
1880 + * fanned out to several fields (every match is now excluded, on purpose).
1881 + */
1882 +function mxchat_show_acf_exclusions_migrated_notice() {
1883 + if (!current_user_can('manage_options')) {
1884 + return;
1885 + }
1886 + if (get_option('mxchat_acf_exclusions_migrated_notice', '') !== '1') {
1887 + return;
1888 + }
1889 + ?>
1890 + <div class="notice notice-info is-dismissible">
1891 + <p>
1892 + <strong><?php esc_html_e('MxChat: ACF field exclusions updated', 'mxchat'); ?></strong><br>
1893 + <?php esc_html_e('Your ACF field exclusion settings were migrated to identify fields precisely, so same-named fields in different groups no longer share one toggle. Where a saved exclusion matched several fields, all of them are now excluded — please review the toggles under MxChat → Knowledge → ACF Field Settings.', 'mxchat'); ?>
1894 + </p>
1895 + </div>
1896 + <?php
1897 + delete_option('mxchat_acf_exclusions_migrated_notice');
1898 +}
1899 +add_action('admin_notices', 'mxchat_show_acf_exclusions_migrated_notice');
1900 +
1901 +/**
1242 1902 * Ensure tables exist on every admin load for fresh installations
1243 1903 * This is a safety net for cases where activation hook doesn't fire
1244 1904 */
1245 1905 function mxchat_ensure_tables_exist() {
@@ -1259,12 +1919,16 @@
1259 1919
1260 1920 $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
1261 1921 $queue_table = $wpdb->prefix . 'mxchat_processing_queue';
1262 1922
1923 + $sessions_table = $wpdb->prefix . 'mxchat_sessions';
1924 +
1263 1925 $chat_exists = $wpdb->get_var("SHOW TABLES LIKE '$table_name'") === $table_name;
1264 1926 $queue_exists = $wpdb->get_var("SHOW TABLES LIKE '$queue_table'") === $queue_table;
1265 -
1266 - if (!$chat_exists || !$queue_exists) {
1927 + $sessions_exists = get_option('mxchat_session_store_ready') !== false
1928 + || $wpdb->get_var("SHOW TABLES LIKE '$sessions_table'") === $sessions_table;
1929 +
1930 + if (!$chat_exists || !$queue_exists || !$sessions_exists) {
1267 1931 //error_log("MxChat: Tables missing on admin load, running activation");
1268 1932 mxchat_activate();
1269 1933 }
1270 1934 }
@@ -1269,49 +1933,116 @@
1269 1933 }
1270 1934 }
1271 1935
1272 1936 /**
1273 - * Clean up orphaned chat history options from the wp_options table
1274 - * @return int Number of options deleted
1937 + * One-shot cleanup of legacy mxchat_history_<sid> option rows (plan 839c4c).
1938 + *
1939 + * 3.2.19 deduplicated per-session chat history into the transcripts table
1940 + * (which already held a superset of every option copy measured), so nothing
1941 + * writes these options any more — but an upgraded install still carries one
1942 + * per session, at up to 64 KB a row (462 rows measured on one production
1943 + * install). This drain replaces the old mxchat_cleanup_orphaned_chat_history()
1944 + * reconciliation sweep, which existed only because there were two copies to
1945 + * reconcile.
1946 + *
1947 + * b64b77 pattern throughout: an option_id bookmark that only moves forward
1948 + * (a crash mid-batch re-processes at most one batch), delete_option() per row
1949 + * so the object + notoptions caches stay coherent, batches drained off
1950 + * non-AJAX admin_init plus the session-store maintenance cron. Once the
1951 + * backlog is gone the state marks done and every later call is one cached
1952 + * option read.
1275 1953 */
1276 -function mxchat_cleanup_orphaned_chat_history() {
1954 +function mxchat_history_backlog_state() {
1955 + // The state option name MUST NOT start with 'mxchat_history_' — the drain
1956 + // deletes everything matching that prefix, and a state option inside the
1957 + // pattern gets eaten by its own drain (caught by the 839c4c rig: batches
1958 + // ran 2,2,2,1 instead of 2,2,1 because the bookmark row was being deleted
1959 + // and re-created every pass).
1960 + $state = get_option('mxchat_legacy_history_cleanup', array());
1961 + if (!is_array($state)) {
1962 + $state = array();
1963 + }
1964 +
1965 + return wp_parse_args($state, array(
1966 + 'done' => false,
1967 + 'last_option_id' => 0,
1968 + 'deleted' => 0,
1969 + ));
1970 +}
1971 +
1972 +/**
1973 + * Delete one batch of legacy history options.
1974 + *
1975 + * @param int $batch Rows per pass — capped small; these can be 64 KB rows.
1976 + * @return int Option rows deleted in this pass.
1977 + */
1978 +function mxchat_history_backlog_batch($batch = 200) {
1277 1979 global $wpdb;
1278 - $count = 0;
1279 1980
1280 - // Get all option keys that match our pattern
1281 - $history_options = $wpdb->get_results(
1282 - "SELECT option_name FROM {$wpdb->options}
1283 - WHERE option_name LIKE 'mxchat_history_%'"
1981 + $state = mxchat_history_backlog_state();
1982 + if (!empty($state['done'])) {
1983 + return 0;
1984 + }
1985 +
1986 + $batch = max(1, (int) $batch);
1987 +
1988 + $rows = $wpdb->get_results(
1989 + $wpdb->prepare(
1990 + "SELECT option_id, option_name FROM {$wpdb->options}
1991 + WHERE option_id > %d AND option_name LIKE %s
1992 + ORDER BY option_id ASC LIMIT %d",
1993 + (int) $state['last_option_id'],
1994 + $wpdb->esc_like('mxchat_history_') . '%',
1995 + $batch
1996 + ),
1997 + ARRAY_A
1284 1998 );
1285 1999
1286 - if (!empty($history_options)) {
1287 - foreach ($history_options as $option) {
1288 - // Extract the session ID from the option name
1289 - $session_id = str_replace('mxchat_history_', '', $option->option_name);
2000 + if (empty($rows)) {
2001 + $state['done'] = true;
2002 + update_option('mxchat_legacy_history_cleanup', $state, 'no');
2003 + return 0;
2004 + }
1290 2005
1291 - // Check if this session still exists in the custom table
1292 - $table_name = $wpdb->prefix . 'mxchat_chat_transcripts';
1293 - $exists = $wpdb->get_var(
1294 - $wpdb->prepare(
1295 - "SELECT COUNT(*) FROM {$table_name} WHERE session_id = %s",
1296 - $session_id
1297 - )
1298 - );
2006 + foreach ($rows as $row) {
2007 + $state['last_option_id'] = max((int) $state['last_option_id'], (int) $row['option_id']);
2008 + delete_option($row['option_name']);
2009 + $state['deleted'] = (int) $state['deleted'] + 1;
2010 + }
1299 2011
1300 - // If session doesn't exist in the main table, delete the option
1301 - if ($exists == 0) {
1302 - delete_option($option->option_name);
1303 - // Also delete related metadata
1304 - delete_option("mxchat_email_{$session_id}");
1305 - delete_option("mxchat_name_{$session_id}");
1306 - delete_option("mxchat_agent_name_{$session_id}");
1307 - $count++;
1308 - }
2012 + if (count($rows) < $batch) {
2013 + $state['done'] = true;
2014 + }
2015 +
2016 + update_option('mxchat_legacy_history_cleanup', $state, 'no');
2017 +
2018 + return count($rows);
2019 +}
2020 +
2021 +/** One batch per admin page load until drained. */
2022 +function mxchat_history_backlog_drain() {
2023 + mxchat_history_backlog_batch();
2024 +}
2025 +
2026 +/** Cron leg: drain faster, same cap per batch. */
2027 +function mxchat_history_backlog_drain_cron() {
2028 + for ($i = 0; $i < 10; $i++) {
2029 + if (mxchat_history_backlog_batch() === 0) {
2030 + break;
1309 2031 }
1310 2032 }
2033 +}
1311 2034
1312 - return $count;
2035 +// wp_doing_ajax() guard is load-bearing, not defensive (b64b77's shipped-and-
2036 +// caught defect): admin-ajax.php fires admin_init too, and the chat widget's
2037 +// message endpoint is an admin-ajax action — without the guard an anonymous
2038 +// visitor would pay for a delete batch inside their own chat request.
2039 +if (!wp_doing_ajax()) {
2040 + add_action('admin_init', 'mxchat_history_backlog_drain', 21);
1313 2041 }
2042 +// Belt for installs whose admin is rarely visited: ride the session store's
2043 +// existing daily maintenance event rather than scheduling another.
2044 +add_action('mxchat_session_store_maintenance', 'mxchat_history_backlog_drain_cron');
1314 2045
1315 2046 function mxchat_migrate_live_agent_status() {
1316 2047 $options = get_option('mxchat_options', []);
1317 2048
@@ -1414,8 +2145,9 @@
1414 2145 add_action('init', 'mxchat_check_fallback_rate_limits', 5);
1415 2146
1416 2147 // Add migration notice hook
1417 2148 add_action('admin_notices', 'mxchat_show_migration_notice');
2149 + add_action('admin_notices', 'mxchat_show_model_access_notice');
1418 2150
1419 2151 // Initialize classes with error handling
1420 2152 try {
1421 2153 // Initialize admin classes
@@ -1440,8 +2172,15 @@
1440 2172 if (class_exists('MxChat_Content_Generator')) {
1441 2173 new MxChat_Content_Generator();
1442 2174 }
1443 2175
2176 + // Initialize cache purge globally — settings writes can happen on any
2177 + // request type (admin screens, admin-ajax autosave, wp-cli), and the
2178 + // deferred-purge cron event fires on front-end requests.
2179 + if (class_exists('MxChat_Cache_Purge')) {
2180 + MxChat_Cache_Purge::init();
2181 + }
2182 +
1444 2183 // Initialize REST API globally — endpoints must be registered on
1445 2184 // every request (admin and frontend) so they're reachable via /wp-json/.
1446 2185 // Endpoints are auth-gated and locked until the site owner generates
1447 2186 // a token in MxChat → API Access.
@@ -1566,9 +2305,9 @@
1566 2305 */
1567 2306 function mxchat_save_session_rating() {
1568 2307 global $wpdb;
1569 2308
1570 - $session_id = isset($_POST['session_id']) ? sanitize_text_field(wp_unslash($_POST['session_id'])) : '';
2309 + $session_id = isset($_POST['session_id']) ? MxChat_Utils::sanitize_session_id(wp_unslash($_POST['session_id'])) : '';
1571 2310 $bot_id = isset($_POST['bot_id']) ? sanitize_text_field(wp_unslash($_POST['bot_id'])) : 'default';
1572 2311 $rating_raw = isset($_POST['rating']) ? (int) $_POST['rating'] : 0;
1573 2312 $feedback = isset($_POST['feedback']) ? sanitize_textarea_field(wp_unslash($_POST['feedback'])) : '';
1574 2313