extendify / app / Agent / Controllers / ChatHistoryController.php

ChatHistoryController.php in Extendify 3.1.0, at app/Agent/Controllers/ChatHistoryController.php

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1	<?php
2
3	/**
4	* Store info about messages/events from chat
5	*/
6
7	namespace Extendify\Agent\Controllers;
8
9	defined('ABSPATH') \|\| die('No direct access.');
10
11	use Extendify\Shared\Services\Sanitizer;
12
13	/**
14	* The controller
15	*/
16
17	class ChatHistoryController
18	{
19	/**
20	* Initialize the controller and set up the database table.
21	*
22	* @return \WP_REST_Response
23	*/
24	public static function init()
25	{
26	self::setupChatHistoryTable();
27	}
28
29	/**
30	* Get the last 150 messages
31	*
32	* @return array
33	*/
34	public static function getChatHistory($user_id = null)
35	{
36	global $wpdb;
37	$table = $wpdb->prefix . 'extendify_agent_events';
38	$user_id = $user_id ?: get_current_user_id();
39
40	$results = $wpdb->get_results(
41	$wpdb->prepare(
42	"SELECT * FROM $table WHERE user_id = %d ORDER BY id DESC LIMIT 150",
43	$user_id
44	),
45	ARRAY_A
46	);
47	return array_map(function ($item) {
48	return [
49	'id' => $item['event_id'],
50	'type' => $item['type'],
51	'details' => json_decode($item['details'], true),
52	];
53	}, $results);
54	}
55
56	/**
57	* Delete the user's chat history, if the table exists.
58	*
59	* @param int\|null $user_id The user ID, defaults to the current user.
60	* @return void
61	*/
62	public static function clear($user_id = null)
63	{
64	global $wpdb;
65	$table = $wpdb->prefix . 'extendify_agent_events';
66	$user_id = $user_id ?: get_current_user_id();
67
68	if (!$wpdb->get_var("SHOW TABLES LIKE '$table'")) {
69	return;
70	}
71
72	$wpdb->query(
73	$wpdb->prepare("DELETE FROM $table WHERE user_id = %d", $user_id)
74	);
75	}
76
77	/**
78	* Return the data
79	*
80	* @return \WP_REST_Response
81	*/
82	public static function get()
83	{
84	$messages = self::getChatHistory();
85	$state = ['state' => ['messages' => Sanitizer::sanitizeArray($messages)]];
86	return new \WP_REST_Response($state);
87	}
88
89	/**
90	* Persist the data
91	*
92	* @param \WP_REST_Request $request - The request.
93	* @return \WP_REST_Response
94	*/
95	public static function store($request)
96	{
97	global $wpdb;
98	$table = $wpdb->prefix . 'extendify_agent_events';
99	$user_id = get_current_user_id();
100
101	$state = $request->get_param('state');
102	$parsed = is_string($state) ? json_decode($state, true) : $state;
103	$messages = $parsed['state']['messages'] ?? [];
104
105	// Find the latest event and only add new messages since then.
106	/* TODO: Maybe we may need a check like:
107	"if this message is assistant and so is the last, delete the last one" to avoid duplicates on retries."
108	*/
109	$latest = $wpdb->get_var(
110	$wpdb->prepare(
111	"SELECT event_id FROM $table WHERE user_id = %d ORDER BY created_at DESC LIMIT 1",
112	$user_id
113	)
114	);
115	$startIndex = 0;
116	if ($latest) {
117	foreach ($messages as $i => $msg) {
118	if ($msg['id'] === $latest) {
119	$startIndex = $i + 1;
120	break;
121	}
122	}
123	}
124
125	$toInsert = array_slice($messages, $startIndex);
126	foreach ($toInsert as $msg) {
127	self::upsertEvent($msg, $user_id);
128	}
129
130	return self::get();
131	}
132
133	/**
134	* Upsert an event into the database.
135	*
136	* @param array $msg The message data.
137	* @param int $user_id The user ID.
138	* @return void
139	*/
140	private static function upsertEvent($msg, $user_id)
141	{
142	global $wpdb;
143	$table = $wpdb->prefix . 'extendify_agent_events';
144	$created_at = current_time('mysql');
145	$event_id = Sanitizer::sanitizeText($msg['id']);
146	$type = Sanitizer::sanitizeText($msg['type']);
147	$details = wp_json_encode(Sanitizer::sanitizeArray($msg['details']));
148
149	$sql = $wpdb->prepare(
150	"INSERT INTO $table (created_at, event_id, type, details, user_id)
151	VALUES (%s, %s, %s, %s, %d)
152	ON DUPLICATE KEY UPDATE
153	created_at = VALUES(created_at),
154	type = VALUES(type),
155	details = VALUES(details)",
156	$created_at,
157	$event_id,
158	$type,
159	$details,
160	$user_id
161	);
162	$wpdb->query($sql);
163	}
164
165	/**
166	* Ensures the custom table exists and is up to date for MySQL.
167	* Creates the table if missing, adds missing columns, and ensures an index on user_id.
168	*
169	* @return void
170	*/
171	private static function setupChatHistoryTable()
172	{
173	global $wpdb;
174	$table = $wpdb->prefix . 'extendify_agent_events';
175	$columns = [
176	'id' => "BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY",
177	'created_at' => "DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP",
178	'event_id' => "VARCHAR(64) NOT NULL",
179	'type' => "VARCHAR(64) NOT NULL",
180	'details' => "LONGTEXT",
181	'user_id' => "BIGINT UNSIGNED NOT NULL"
182	];
183
184	// Check if the table exists and create it if not
185	$exists = $wpdb->get_var("SHOW TABLES LIKE '$table'");
186	if (!$exists) {
187	$cols = [];
188	foreach ($columns as $name => $type) {
189	$cols[] = "$name $type";
190	}
191	$sql = "CREATE TABLE $table (" . implode(',', $cols) . ", INDEX(user_id))";
192	$sql .= " " . $wpdb->get_charset_collate() . ";";
193	$wpdb->query($sql);
194	return;
195	}
196
197	// Check existing columns and add missing ones
198	$existingCols = array_column($wpdb->get_results("SHOW COLUMNS FROM $table", ARRAY_A), 'Field');
199	foreach ($columns as $name => $type) {
200	if (!in_array($name, $existingCols, true)) {
201	$wpdb->query("ALTER TABLE $table ADD COLUMN $name $type");
202	}
203	}
204
205	// Unique index on (event_id, user_id)
206	$uniqueIndex = $wpdb->get_results("SHOW INDEX FROM $table WHERE Key_name = 'unique_event_id'", ARRAY_A);
207	if (empty($uniqueIndex)) {
208	$wpdb->query("CREATE UNIQUE INDEX unique_event_id ON $table(event_id, user_id)");
209	}
210
211	// Regular index on user_id
212	$userIndex = $wpdb->get_results("SHOW INDEX FROM $table WHERE Key_name = 'user_id'", ARRAY_A);
213	if (empty($userIndex)) {
214	$wpdb->query("CREATE INDEX user_id ON $table(user_id)");
215	}
216	}
217	}
218