extendify / app / Agent / Controllers / ChatHistoryController.php

ChatHistoryController.php in Extendify 3.0.4, 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	/**
58	* Return the data
59	*
60	* @return \WP_REST_Response
61	*/
62	public static function get()
63	{
64	$messages = self::getChatHistory();
65	$state = ['state' => ['messages' => Sanitizer::sanitizeArray($messages)]];
66	return new \WP_REST_Response($state);
67	}
68
69	/**
70	* Persist the data
71	*
72	* @param \WP_REST_Request $request - The request.
73	* @return \WP_REST_Response
74	*/
75	public static function store($request)
76	{
77	global $wpdb;
78	$table = $wpdb->prefix . 'extendify_agent_events';
79	$user_id = get_current_user_id();
80
81	$state = $request->get_param('state');
82	$parsed = is_string($state) ? json_decode($state, true) : $state;
83	$messages = $parsed['state']['messages'] ?? [];
84
85	// Find the latest event and only add new messages since then.
86	/* TODO: Maybe we may need a check like:
87	"if this message is assistant and so is the last, delete the last one" to avoid duplicates on retries."
88	*/
89	$latest = $wpdb->get_var(
90	$wpdb->prepare(
91	"SELECT event_id FROM $table WHERE user_id = %d ORDER BY created_at DESC LIMIT 1",
92	$user_id
93	)
94	);
95	$startIndex = 0;
96	if ($latest) {
97	foreach ($messages as $i => $msg) {
98	if ($msg['id'] === $latest) {
99	$startIndex = $i + 1;
100	break;
101	}
102	}
103	}
104
105	$toInsert = array_slice($messages, $startIndex);
106	foreach ($toInsert as $msg) {
107	self::upsertEvent($msg, $user_id);
108	}
109
110	return self::get();
111	}
112
113	/**
114	* Upsert an event into the database.
115	*
116	* @param array $msg The message data.
117	* @param int $user_id The user ID.
118	* @return void
119	*/
120	private static function upsertEvent($msg, $user_id)
121	{
122	global $wpdb;
123	$table = $wpdb->prefix . 'extendify_agent_events';
124	$created_at = current_time('mysql');
125	$event_id = Sanitizer::sanitizeText($msg['id']);
126	$type = Sanitizer::sanitizeText($msg['type']);
127	$details = wp_json_encode(Sanitizer::sanitizeArray($msg['details']));
128
129	$sql = $wpdb->prepare(
130	"INSERT INTO $table (created_at, event_id, type, details, user_id)
131	VALUES (%s, %s, %s, %s, %d)
132	ON DUPLICATE KEY UPDATE
133	created_at = VALUES(created_at),
134	type = VALUES(type),
135	details = VALUES(details)",
136	$created_at,
137	$event_id,
138	$type,
139	$details,
140	$user_id
141	);
142	$wpdb->query($sql);
143	}
144
145	/**
146	* Ensures the custom table exists and is up to date for MySQL.
147	* Creates the table if missing, adds missing columns, and ensures an index on user_id.
148	*
149	* @return void
150	*/
151	private static function setupChatHistoryTable()
152	{
153	global $wpdb;
154	$table = $wpdb->prefix . 'extendify_agent_events';
155	$columns = [
156	'id' => "BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY",
157	'created_at' => "DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP",
158	'event_id' => "VARCHAR(64) NOT NULL",
159	'type' => "VARCHAR(64) NOT NULL",
160	'details' => "LONGTEXT",
161	'user_id' => "BIGINT UNSIGNED NOT NULL"
162	];
163
164	// Check if the table exists and create it if not
165	$exists = $wpdb->get_var("SHOW TABLES LIKE '$table'");
166	if (!$exists) {
167	$cols = [];
168	foreach ($columns as $name => $type) {
169	$cols[] = "$name $type";
170	}
171	$sql = "CREATE TABLE $table (" . implode(',', $cols) . ", INDEX(user_id))";
172	$sql .= " " . $wpdb->get_charset_collate() . ";";
173	$wpdb->query($sql);
174	return;
175	}
176
177	// Check existing columns and add missing ones
178	$existingCols = array_column($wpdb->get_results("SHOW COLUMNS FROM $table", ARRAY_A), 'Field');
179	foreach ($columns as $name => $type) {
180	if (!in_array($name, $existingCols, true)) {
181	$wpdb->query("ALTER TABLE $table ADD COLUMN $name $type");
182	}
183	}
184
185	// Unique index on (event_id, user_id)
186	$uniqueIndex = $wpdb->get_results("SHOW INDEX FROM $table WHERE Key_name = 'unique_event_id'", ARRAY_A);
187	if (empty($uniqueIndex)) {
188	$wpdb->query("CREATE UNIQUE INDEX unique_event_id ON $table(event_id, user_id)");
189	}
190
191	// Regular index on user_id
192	$userIndex = $wpdb->get_results("SHOW INDEX FROM $table WHERE Key_name = 'user_id'", ARRAY_A);
193	if (empty($userIndex)) {
194	$wpdb->query("CREATE INDEX user_id ON $table(user_id)");
195	}
196	}
197	}
198