optimole-wp / inc / logger.php

logger.php in Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization 3.11.2, at inc/logger.php

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1	<?php
2	/**
3	* Class Optml_Logger
4	* Handles the logging operations.
5	*/
6	class Optml_Logger {
7
8	const LOG_TYPE_OFFLOAD = 'offload';
9	const LOG_TYPE_ROLLBACK = 'rollback';
10
11	const LOG_SEPARATOR = '==========';
12
13	/**
14	* Upload directory.
15	*
16	* @var string
17	*/
18	private $upload_dir;
19
20	/**
21	* Log filenames.
22	*
23	* @var array
24	*/
25	private $log_filenames = [
26	self::LOG_TYPE_OFFLOAD => 'offload.log',
27	self::LOG_TYPE_ROLLBACK => 'rollback.log',
28	];
29
30	/**
31	* The single instance of the class.
32	*
33	* @var Optml_Logger
34	*/
35	private static $instance = null;
36
37	/**
38	* Ensures only one instance of the class is loaded.
39	*
40	* @return Optml_Logger An instance of the class.
41	*/
42	public static function instance() {
43	if ( null === self::$instance ) {
44	self::$instance = new self();
45	}
46
47	return self::$instance;
48	}
49
50	/**
51	* Optml_Logger constructor.
52	* Initializes the upload directory.
53	*
54	* @return void
55	*/
56	private function __construct() {
57	$upload_dir = wp_upload_dir();
58	$this->upload_dir = trailingslashit( $upload_dir['basedir'] ) . 'optimole-logs/';
59
60	if ( ! file_exists( $this->upload_dir ) ) {
61	if ( false === wp_mkdir_p( $this->upload_dir ) ) {
62	return;
63	}
64	}
65
66	add_action( 'wp_ajax_optml_fetch_logs', [ $this, 'fetch_logs_ajax_handler' ] );
67	}
68
69	/**
70	* Adds a log entry.
71	*
72	* @param string $type Type of log (offload/rollback).
73	* @param string $message Log message.
74	* @return bool Returns true on success, false on failure.
75	*/
76	public function add_log( $type, $message ) {
77	if ( ! array_key_exists( $type, $this->log_filenames ) ) {
78	return false;
79	}
80
81	$this->send_log( $type, $message );
82
83	if ( ! $this->has_permission() ) {
84	return false;
85	}
86
87	$file_path = $this->upload_dir . $this->log_filenames[ $type ];
88	$handle = @fopen( $file_path, 'a' );
89
90	if ( $handle === false ) {
91	return false;
92	}
93
94	fwrite( $handle, '[' . gmdate( 'M d H:i:s' ) . '] ' . $message . "\n" );
95	fclose( $handle );
96	return true;
97	}
98
99	/**
100	* Retrieves the log.
101	*
102	* @param string $type Type of log (offload/rollback).
103	* @param int $lines Number of lines to return from the end of the log file.
104	* @param string $separator Separator line to start retrieving log entries from.
105	*
106	* @return false\|string Returns log data or false on failure.
107	*/
108	public function get_log( $type, $lines = 500, $separator = '' ) {
109	if ( ! array_key_exists( $type, $this->log_filenames ) ) {
110	return false;
111	}
112
113	$file_path = $this->upload_dir . $this->log_filenames[ $type ];
114
115	if ( $this->has_logs( $type ) ) {
116	$data = $this->tailCustom( $file_path, $lines, true, $separator );
117	return nl2br( esc_textarea( $data ) );
118	}
119
120	return false;
121	}
122
123	/**
124	* Checks if the log file exists.
125	*
126	* @param string $type Type of log (offload/rollback).
127	* @return bool Returns true if log file exists, false otherwise.
128	*/
129	public function has_logs( $type ) {
130	if ( ! array_key_exists( $type, $this->log_filenames ) ) {
131	return false;
132	}
133
134	$file_path = $this->upload_dir . $this->log_filenames[ $type ];
135	return file_exists( $file_path );
136	}
137
138	/**
139	* Checks for permission to write to log file.
140	*
141	* @return bool Returns true if permission is granted, false otherwise.
142	*/
143	public function has_permission() {
144	return is_writable( $this->upload_dir );
145	}
146
147	/**
148	* Reads the last n lines from a file, or from a specific point defined by a separator.
149	*
150	* @param string $filepath Path to the file.
151	* @param int $lines Number of lines to read from the end of the file.
152	* @param bool $adaptive Use adaptive buffers.
153	* @param string $separator Separator line to start retrieving log entries from.
154	* @return false\|string Returns last n lines from the file or false on failure.
155	*/
156	private function tailCustom( $filepath, $lines = 1, $adaptive = true, $separator = '' ) {
157	$f = @fopen( $filepath, 'rb' );
158
159	if ( $f === false ) {
160	return false;
161	}
162
163	if ( ! $adaptive ) {
164	$buffer = 4096;
165	} else {
166	$buffer = min( 64, filesize( $filepath ) );
167	}
168
169	fseek( $f, -1, SEEK_END );
170	$output = '';
171	$read = '';
172	$separator_found = false;
173
174	while ( $buffer > 0 && ftell( $f ) > 0 ) {
175	$seek = min( ftell( $f ), $buffer );
176	fseek( $f, -$seek, SEEK_CUR );
177	$output = ( $read = fread( $f, $seek ) ) . $output;
178	fseek( $f, -mb_strlen( $read, '8bit' ), SEEK_CUR );
179
180	if ( ! empty( $separator ) && strpos( $output, $separator ) !== false ) {
181	$separator_found = true;
182	break;
183	}
184
185	$buffer = min( $buffer * 2, 4096 );
186	}
187
188	if ( ! empty( $separator ) && $separator_found ) {
189	$pos = strrpos( $output, $separator );
190	if ( $pos !== false ) {
191	$output = substr( $output, $pos + strlen( $separator ) );
192	}
193	}
194
195	// Extract the desired number of lines
196	$output_lines = explode( "\n", $output );
197	if ( empty( $separator ) \|\| ! $separator_found ) {
198	$output = implode( "\n", array_slice( $output_lines, -$lines ) ); // fetch last n lines
199	} else {
200	$output = implode( "\n", array_slice( $output_lines, 0, $lines ) ); // fetch from separator
201	}
202
203	fclose( $f );
204	return trim( $output );
205	}
206
207	/**
208	* Fetches the logs via AJAX.
209	*
210	* @return void
211	*/
212	public function fetch_logs_ajax_handler() {
213	// Check for nonce security
214	$nonce = $_REQUEST['nonce'];
215	if ( ! wp_verify_nonce( $nonce, 'wp_rest' ) ) {
216	wp_die( __( 'Security check failed', 'optimole-wp' ) );
217	}
218
219	// Check for necessary parameters
220	if ( ! isset( $_REQUEST['type'] ) \|\| ! in_array( $_REQUEST['type'], array_keys( $this->log_filenames ), true ) ) {
221	wp_die( __( 'Invalid log type', 'optimole-wp' ) );
222	}
223
224	$lines = 10000;
225
226	if ( isset( $_REQUEST['lines'] ) ) {
227	$lines = intval( $_REQUEST['lines'] );
228	}
229
230	// Get log type
231	$type = $_REQUEST['type'];
232
233	// Fetch the logs
234	$logs = $this->get_log( $type, $lines, self::LOG_SEPARATOR );
235
236	// Return the logs
237	echo $logs;
238
239	wp_die();
240	}
241
242	/**
243	* Send logs to Axiom.
244	*
245	* @param string $type Type of log (offload/rollback).
246	* @param string $message Log message.
247
248	* @return void
249	*/
250	public function send_log( $type, $message ) {
251	$request = new Optml_Api();
252	$request->send_log( $type, $message );
253	}
254	}
255