jetpack / jetpack_vendor / automattic / jetpack-sync / src / modules / class-import.php

class-import.php in Jetpack – WP Security, Backup, Speed, & Growth 16.3-a.1, at jetpack_vendor/automattic/jetpack-sync/src/modules/class-import.php

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1	<?php
2	/**
3	* Import sync module.
4	*
5	* @package automattic/jetpack-sync
6	*/
7
8	namespace Automattic\Jetpack\Sync\Modules;
9
10	use Automattic\Jetpack\Sync\Settings;
11
12	if ( ! defined( 'ABSPATH' ) ) {
13	exit( 0 );
14	}
15
16	/**
17	* Class to handle sync for imports.
18	*/
19	class Import extends Module {
20
21	/**
22	* Tracks which actions have already been synced for the import
23	* to prevent the same event from being triggered a second time.
24	*
25	* @var array
26	*/
27	private $synced_actions = array();
28
29	/**
30	* A mapping of action types to sync action name.
31	* Keys are the name of the import action.
32	* Values are the resulting sync action.
33	*
34	* Note: import_done and import_end both intentionally map to
35	* jetpack_sync_import_end, as they both track the same type of action,
36	* the successful completion of an import. Different import plugins use
37	* differently named actions, and this is an attempt to consolidate.
38	*
39	* @var array
40	*/
41	private static $import_sync_action_map = array(
42	'import_start' => 'jetpack_sync_import_start',
43	'import_done' => 'jetpack_sync_import_end',
44	'import_end' => 'jetpack_sync_import_end',
45	);
46
47	/**
48	* Sync module name.
49	*
50	* @access public
51	*
52	* @return string
53	*/
54	public function name() {
55	return 'import';
56	}
57
58	/**
59	* Initialize imports action listeners.
60	*
61	* @access public
62	*
63	* @param callable $callable Action handler callable.
64	*/
65	public function init_listeners( $callable ) {
66	add_action( 'export_wp', $callable );
67	add_action( 'jetpack_sync_import_start', $callable, 10, 2 );
68	add_action( 'jetpack_sync_import_end', $callable, 10, 2 );
69
70	// WordPress.
71	add_action( 'import_start', array( $this, 'sync_import_action' ) );
72
73	// Movable type, RSS, Livejournal.
74	add_action( 'import_done', array( $this, 'sync_import_action' ) );
75
76	// WordPress, Blogger, Livejournal, woo tax rate.
77	add_action( 'import_end', array( $this, 'sync_import_action' ) );
78	}
79
80	/**
81	* Set module defaults.
82	* Define an empty list of synced actions for us to fill later.
83	*
84	* @access public
85	*/
86	public function set_defaults() {
87	$this->synced_actions = array();
88	}
89
90	/**
91	* Generic handler for import actions.
92	*
93	* @access public
94	*
95	* @param string $importer Either a string reported by the importer, the class name of the importer, or 'unknown'.
96	*/
97	public function sync_import_action( $importer ) {
98	$import_action = current_filter();
99	// Map action to event name.
100	$sync_action = self::$import_sync_action_map[ $import_action ];
101
102	// Only sync each action once per import.
103	if ( array_key_exists( $sync_action, $this->synced_actions ) && $this->synced_actions[ $sync_action ] ) {
104	return;
105	}
106
107	// Mark this action as synced.
108	$this->synced_actions[ $sync_action ] = true;
109
110	// Prefer self-reported $importer value.
111	if ( ! $importer ) {
112	// Fall back to inferring by calling class name.
113	$importer = self::get_calling_importer_class();
114	}
115
116	// Get $importer from known_importers.
117	$known_importers = Settings::get_setting( 'known_importers' );
118	if ( is_string( $importer ) && isset( $known_importers[ $importer ] ) ) {
119	$importer = $known_importers[ $importer ];
120	}
121
122	$importer_name = $this->get_importer_name( $importer );
123
124	switch ( $sync_action ) {
125	case 'jetpack_sync_import_start':
126	/**
127	* Used for syncing the start of an import
128	*
129	* @since 1.6.3
130	* @since-jetpack 7.3.0
131	*
132	* @module sync
133	*
134	* @param string $importer Either a string reported by the importer, the class name of the importer, or 'unknown'.
135	* @param string $importer_name The name reported by the importer, or 'Unknown Importer'.
136	*/
137	do_action( 'jetpack_sync_import_start', $importer, $importer_name );
138	break;
139
140	case 'jetpack_sync_import_end':
141	/**
142	* Used for syncing the end of an import
143	*
144	* @since 1.6.3
145	* @since-jetpack 7.3.0
146	*
147	* @module sync
148	*
149	* @param string $importer Either a string reported by the importer, the class name of the importer, or 'unknown'.
150	* @param string $importer_name The name reported by the importer, or 'Unknown Importer'.
151	*/
152	do_action( 'jetpack_sync_import_end', $importer, $importer_name );
153	break;
154	}
155	}
156
157	/**
158	* Retrieve the name of the importer.
159	*
160	* @access private
161	*
162	* @param string $importer Either a string reported by the importer, the class name of the importer, or 'unknown'.
163	* @return string Name of the importer, or "Unknown Importer" if importer is unknown.
164	*/
165	private function get_importer_name( $importer ) {
166	$importers = get_importers();
167	return isset( $importers[ $importer ] ) ? $importers[ $importer ][0] : 'Unknown Importer';
168	}
169
170	/**
171	* Determine the class that extends `WP_Importer` which is responsible for
172	* the current action. Designed to be used within an action handler.
173	*
174	* @access private
175	* @static
176	*
177	* @return string The name of the calling class, or 'unknown'.
178	*/
179	private static function get_calling_importer_class() {
180	// If WP_Importer doesn't exist, neither will any importer that extends it.
181	if ( ! class_exists( 'WP_Importer', false ) ) {
182	return 'unknown';
183	}
184
185	$action = current_filter();
186	$backtrace = debug_backtrace( 0 ); //phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_debug_backtrace
187
188	$do_action_pos = -1;
189	$backtrace_len = count( $backtrace );
190	for ( $i = 0; $i < $backtrace_len; $i++ ) {
191	// Find the location in the stack of the calling action.
192	if ( 'do_action' === $backtrace[ $i ]['function'] && $action === $backtrace[ $i ]['args'][0] ) {
193	$do_action_pos = $i;
194	break;
195	}
196	}
197
198	// If the action wasn't called, the calling class is unknown.
199	if ( -1 === $do_action_pos ) {
200	return 'unknown';
201	}
202
203	// Continue iterating the stack looking for a caller that extends WP_Importer.
204	for ( $i = $do_action_pos + 1; $i < $backtrace_len; $i++ ) {
205	// If there is no class on the trace, continue.
206	if ( ! isset( $backtrace[ $i ]['class'] ) ) {
207	continue;
208	}
209
210	$class_name = $backtrace[ $i ]['class'];
211
212	// Check if the class extends WP_Importer.
213	if ( class_exists( $class_name, false ) ) {
214	$parents = class_parents( $class_name, false );
215	if ( $parents && in_array( 'WP_Importer', $parents, true ) ) {
216	return $class_name;
217	}
218	}
219	}
220
221	// If we've exhausted the stack without a match, the calling class is unknown.
222	return 'unknown';
223	}
224	}
225