learnpress / inc / admin / class-lp-admin-assets.php

class-lp-admin-assets.php in LearnPress – WordPress LMS Plugin for Create and Sell Online Courses 4.4.2, at inc/admin/class-lp-admin-assets.php

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1	<?php
2
3	use LearnPress\Helpers\Config;
4	use LearnPress\Helpers\Template;
5	use LearnPress\Models\CourseModel;
6
7	/**
8	* Class LP_Admin_Assets
9	*
10	* Manage admin assets
11	*/
12	class LP_Admin_Assets extends LP_Abstract_Assets {
13	protected static $_instance;
14
15	/**
16	* LP_Admin_Assets constructor.
17	*/
18	protected function __construct() {
19	add_action( 'admin_footer', array( $this, 'add_elements_global' ) );
20	add_action( 'admin_print_scripts', array( $this, 'load_scripts_styles_on_head' ), - 1 );
21	parent::__construct();
22	}
23
24	/**
25	* Add javascript to head
26	* Add style to head
27	*
28	* @return void
29	* @version 1.0.0
30	* @since 4.2.5.6
31	*/
32	public function load_scripts_styles_on_head() {
33	LP_Helper::print_inline_script_tag( 'lpDataAdmin', $this->localize_data_global(), array( 'id' => 'lpDataAdmin' ) );
34	LP_Helper::print_inline_script_tag( 'lpData', $this->localize_data_global(), array( 'id' => 'lpData' ) );
35	}
36
37	/**
38	* Localize data for all page backend.
39	*
40	* @return array
41	* @since 4.2.5.6
42	* @version 1.0.2
43	*/
44	public function localize_data_global(): array {
45	$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
46
47	ob_start();
48	Template::instance()->get_admin_template( 'search-author-field.php' );
49	$html_search_author_field = ob_get_clean();
50
51	return apply_filters(
52	'learn-press/admin/localize-data-global',
53	array(
54	'site_url' => site_url(),
55	'user_id' => get_current_user_id(),
56	'is_admin' => current_user_can( ADMIN_ROLE ),
57	'theme' => get_stylesheet(),
58	'lp_version' => LP()->version,
59	'lp_rest_url' => get_rest_url(),
60	'lp_rest_load_ajax' => get_rest_url( null, 'lp/v1/load_content_via_ajax/' ), // @deprecated 4.3.0
61	'lpAjaxUrl' => LP_Settings::url_handle_lp_ajax(),
62	'nonce' => wp_create_nonce( 'wp_rest' ),
63	'courses_url' => learn_press_get_page_link( 'courses' ),
64	'urlParams' => lp_archive_skeleton_get_args(),
65	'i18n' => array(
66	'select_page' => esc_html__( 'Select page', 'learnpress' ),
67	'yes' => esc_html__( 'Yes' ),
68	'cancel' => esc_html__( 'Cancel' ),
69	'generate_with_ai' => esc_html__( 'Generate with AI', 'learnpress' ),
70	'confirm_close_ai' => esc_html__( 'Are you sure you want to close? Generate data will stop.', 'learnpress' ),
71	),
72	'current_screen' => $screen ? $screen->id : '',
73	'show_search_author_field' => empty( $html_search_author_field ) ? 0 : $html_search_author_field,
74	'toast' => array(
75	'gravity' => 'bottom',
76	'position' => 'center',
77	'duration' => 3000,
78	'close' => 1,
79	'stopOnFocus' => 1,
80	'classPrefix' => 'lp-toast',
81	),
82	'single_instructor_id' => learn_press_get_page_id( 'single_instructor' ),
83	'lpAi' => array(
84	'config' => Config::instance()->get( 'open-ai-modal', 'settings' ),
85	'modelImage' => LP_Settings::get_option( 'open_ai_image_model_type', 'dall-e-3' ),
86	),
87	'enable_open_ai' => LP_Settings::get_option( 'enable_open_ai', 'no' ) === 'yes'
88	&& ! empty( LP_Settings::get_option( 'open_ai_secret_key', '' ) ),
89	)
90	);
91	}
92
93	/**
94	* Get localize script
95	*
96	* @return array
97	*/
98	protected function _get_script_data(): array {
99	$current_screen = get_current_screen();
100
101	return array(
102	'learn-press-global' => learn_press_global_script_params(),
103	/*'learn-press-meta-box-order' => apply_filters(
104	'learn-press/meta-box-order/script-data',
105	array(
106	'i18n_error' => esc_html__( 'Oops! Error.', 'learnpress' ),
107	'i18n_guest' => esc_html__( 'Guest', 'learnpress' ),
108	)
109	),*/
110	/*'learn-press-update' => apply_filters(
111	'learn-press/upgrade/script-data',
112	array(
113	'i18n_confirm' => esc_html__(
114	'Before taking this action, we strongly recommend you backup your site first before proceeding. If you encounter any problems, please do not hesitate to contact our support team. Are you sure to proceed with the update protocol?',
115	'learnpress'
116	),
117	)
118	),*/
119	'lp-admin' => apply_filters(
120	'learn-press/admin/script-data',
121	array(
122	'ajax' => admin_url( 'admin-ajax.php' ),
123	'questionTypes' => learn_press_question_types(),
124	'supportAnswerOptions' => learn_press_get_question_support_answer_options(),
125	'screen' => $current_screen,
126	)
127	),
128	// @deprecated tag 'learn-press-admin-course-editor' 4.4.2 - no any enqueue js for that.
129	//'learn-press-admin-course-editor' => $this->get_course_data_for_editor_vue(),
130	);
131	}
132
133	/**
134	* Get default scripts in admin.
135	*
136	* @return mixed
137	*/
138	protected function _get_scripts(): array {
139	$lp_admin_js = new LP_Asset_Key(
140	$this->url( 'js/dist/admin/admin' . self::$_min_assets . '.js' ),
141	array( 'wp-i18n', 'lp-utils' ),
142	array(),
143	0,
144	0,
145	'',
146	array( 'strategy' => 'async' )
147	);
148	$lp_admin_js->exclude_screen(
149	array(
150	'plugin-install',
151	'learnpress_page_learn-press-statistics',
152	'learnpress_page_learn-press-addons',
153	)
154	);
155
156	$scripts = apply_filters(
157	'learn-press/admin-default-scripts',
158	array(
159	'lp-load-ajax' => new LP_Asset_Key(
160	self::url( 'js/dist/loadAJAX' . self::$_min_assets . '.js' ),
161	array(),
162	array(),
163	0,
164	0,
165	'',
166	array( 'strategy' => 'async' )
167	),
168	// need build if change source vue
169	'vue-libs' => new LP_Asset_Key( $this->url( 'js/vendor/vue/vue_libs.js' ) ),
170	//'select2' => new LP_Asset_Key( $this->url( 'src/js/vendor/select2.full.min.js' ) ),
171	'jquery-tipsy' => new LP_Asset_Key( $this->url( 'src/js/vendor/jquery/jquery-tipsy.js' ) ),
172	'html2pdf' => new LP_Asset_Key( $this->url( 'src/js/vendor/html2pdf.bundle.min.js' ) ),
173	'lp-utils' => new LP_Asset_Key(
174	$this->url( 'js/dist/utils' . self::$_min_assets . '.js' ),
175	array(),
176	array(),
177	1
178	),
179	/*'dropdown-pages' => new LP_Asset_Key(
180	$this->url( self::$_folder_source . 'js/admin/share/dropdown-pages' . self::$_min_assets . '.js' ),
181	array( 'lp-utils', 'select2' )
182	),*/
183	/*
184	'jquery-ui-timepicker-addon' => new LP_Asset_Key(
185	$this->url( 'src/js/vendor/jquery/jquery-ui-timepicker-addon.js' ),
186	array( 'jquery-ui-datepicker' )
187	),*/
188	'lp-addons' => new LP_Asset_Key(
189	$this->url( 'js/dist/admin/addons' . self::$_min_assets . '.js' ),
190	array(),
191	array( 'learnpress_page_learn-press-addons' ),
192	0,
193	0,
194	'',
195	array( 'strategy' => 'async' )
196	),
197	// 'advanced-list' => new LP_Asset_Key( $this->url( self::$_folder_source . 'js/admin/share/advanced-list' . self::$_min_assets . '.js' ) ),
198	'learn-press-global' => new LP_Asset_Key(
199	$this->url( self::$_folder_source . 'js/global' . self::$_min_assets . '.js' ),
200	array( 'jquery', 'underscore', 'utils', 'jquery-ui-sortable' )
201	),
202	'lp-admin' => $lp_admin_js,
203	'lp-admin-mcp-api-keys' => new LP_Asset_Key(
204	$this->url( 'js/dist/admin/mcp-api-keys.js' ),
205	[ 'lp-load-ajax' ],
206	[ 'learnpress_page_learn-press-settings' ],
207	0,
208	1,
209	'',
210	array( 'strategy' => 'defer' )
211	),
212	'lp-admin-webhooks' => new LP_Asset_Key(
213	$this->url( 'js/dist/admin/webhooks.js' ),
214	[ 'lp-load-ajax', 'lp-admin' ],
215	[ 'learnpress_page_learn-press-settings' ],
216	0,
217	1,
218	'',
219	[ 'strategy' => 'defer' ]
220	),
221	'lp-admin-learnpress' => new LP_Asset_Key(
222	$this->url( 'js/dist/admin/learnpress' . self::$_min_assets . '.js' ),
223	array(
224	'learn-press-global',
225	'wp-color-picker',
226	'jquery-tipsy',
227	//'dropdown-pages',
228	'wp-api-fetch',
229	// 'jquery-ui-timepicker-addon',
230	// 'select2'
231	),
232	array(
233	LP_LESSON_CPT,
234	LP_QUIZ_CPT,
235	LP_COURSE_CPT,
236	// LP_ORDER_CPT,
237	'learnpress_page_learn-press-settings',
238	),
239	0,
240	1,
241	'',
242	array( 'strategy' => 'defer' )
243	),
244	'lp-duplicate-post' => new LP_Asset_Key(
245	$this->url( self::$_folder_source . 'js/admin/lp-duplicate-post' . self::$_min_assets . '.js' ),
246	array( 'jquery' ),
247	array(
248	'edit-' . LP_COURSE_CPT,
249	'edit-' . LP_LESSON_CPT,
250	'edit-' . LP_QUESTION_CPT,
251	'edit-' . LP_QUIZ_CPT,
252	),
253	0,
254	1
255	),
256	/*
257	'learn-press-admin-course-editor' => new LP_Asset_Key(
258	$this->url( 'js/dist/admin/editor/course' . self::$_min_assets . '.js' ),
259	array( 'vue-libs', 'lp-utils' ),
260	array( LP_COURSE_CPT ),
261	0,
262	0
263	),*/
264	'lp-admin-courses' => new LP_Asset_Key(
265	$this->url( 'dist/js/admin/admin-courses' . self::$_min_assets . '.js' ),
266	array( 'lp-load-ajax', 'wp-i18n' ),
267	array( 'edit-' . LP_COURSE_CPT ),
268	0,
269	0,
270	'',
271	array( 'strategy' => 'async' )
272	),
273	'lp-edit-course' => new LP_Asset_Key(
274	$this->url( 'dist/js/admin/edit-course' . self::$_min_assets . '.js' ),
275	array( 'lp-load-ajax' ),
276	array(),
277	1,
278	0,
279	'',
280	array( 'strategy' => 'async' )
281	),
282	'lp-edit-quiz' => new LP_Asset_Key(
283	$this->url( 'dist/js/admin/edit-quiz' . self::$_min_assets . '.js' ),
284	array( 'lp-load-ajax' ),
285	array(),
286	1,
287	0,
288	'',
289	array( 'strategy' => 'async' )
290	),
291	'lp-edit-question' => new LP_Asset_Key(
292	$this->url( 'dist/js/admin/edit-question' . self::$_min_assets . '.js' ),
293	array( 'lp-load-ajax' ),
294	array(),
295	1,
296	0,
297	'',
298	array( 'strategy' => 'async' )
299	),
300	/*
301	'learn-press-admin-quiz-editor' => new LP_Asset_Key(
302	$this->url( 'js/dist/admin/editor/quiz' . self::$_min_assets . '.js' ),
303	array( 'vue-libs', 'lp-utils' ),
304	array( LP_QUIZ_CPT ),
305	0,
306	0
307	),*/
308	/*
309	'learn-press-admin-question-editor' => new LP_Asset_Key(
310	$this->url( 'js/dist/admin/editor/question' . self::$_min_assets . '.js' ),
311	array( 'vue-libs', 'lodash', 'lp-utils' ),
312	array( LP_QUESTION_CPT ),
313	0,
314	0
315	),*/
316	/*
317	'learn-press-meta-box-order' => new LP_Asset_Key(
318	$this->url( self::$_folder_source . 'js/admin/partial/meta-box-order' . self::$_min_assets . '.js' ),
319	array(
320	'vue-libs',
321	'advanced-list',
322	//'lp-modal-search-courses',
323	//'lp-modal-search-users',
324	),
325	array( LP_ORDER_CPT ),
326	0,
327	1
328	),*/
329	'lp-admin-order' => new LP_Asset_Key(
330	$this->url( 'js/dist/admin/admin-order' . self::$_min_assets . '.js' ),
331	array( 'html2pdf', 'lp-load-ajax' ),
332	array( LP_ORDER_CPT ),
333	0,
334	0,
335	'',
336	array( 'strategy' => 'defer' )
337	),
338	'lp-admin-orders' => new LP_Asset_Key(
339	$this->url( 'js/dist/admin/admin-orders' . self::$_min_assets . '.js' ),
340	array(),
341	array( 'edit-' . LP_ORDER_CPT ),
342	0,
343	0,
344	'',
345	array( 'strategy' => 'async' )
346	),
347
348	/*
349	'learn-press-sync-data' => new LP_Asset_Key(
350	$this->url( 'js/dist/admin/pages/sync-data' . self::$_min_assets . '.js' ),
351	array(),
352	array( 'learnpress_page_learn-press-tools' ),
353	0,
354	1
355	),*/
356	/*
357	'lp-setup' => new LP_Asset_Key(
358	$this->url( 'js/dist/admin/pages/setup' . self::$_min_assets . '.js' ),
359	array( 'jquery', 'dropdown-pages' ),
360	array( 'lp-page-setup' ),
361	0,
362	1
363	),*/
364	/*
365	'learn-press-statistic' => new LP_Asset_Key(
366	$this->url( 'js/dist/admin/pages/statistic' . self::$_min_assets . '.js' ),
367	array( 'jquery', 'jquery-ui-datepicker', 'chart' ),
368	array( 'learnpress_page_learn-press-statistics' ),
369	0,
370	1
371	),*/
372	/*
373	'lp-modal-search-courses' => new LP_Asset_Key(
374	$this->url( self::$_folder_source . 'js/admin/share/modal-search-courses' . self::$_min_assets . '.js' ),
375	array(
376	'vue-libs',
377	'jquery',
378	),
379	array( LP_ORDER_CPT ),
380	1,
381	1
382	),*/
383	/*
384	'lp-modal-search-users' => new LP_Asset_Key(
385	$this->url( self::$_folder_source . 'js/admin/share/modal-search-users' . self::$_min_assets . '.js' ),
386	array( 'jquery' ),
387	array( LP_ORDER_CPT ),
388	1,
389	1
390	),*/
391	'lp-tools-course-tab' => new LP_Asset_Key(
392	$this->url( 'js/dist/admin/pages/tools' . self::$_min_assets . '.js' ),
393	array(
394	'jquery',
395	'wp-element',
396	'wp-compose',
397	'wp-components',
398	'wp-data',
399	'wp-hooks',
400	'wp-api-fetch',
401	'lodash',
402	'vue-libs',
403
404	),
405	array( 'learnpress_page_learn-press-tools' ),
406	0,
407	1,
408	'',
409	array( 'strategy' => 'defer' )
410	),
411	/*
412	'lp-dashboard' => new LP_Asset_Key(
413	self::url( 'js/dist/admin/pages/dashboard' . self::$_min_assets . '.js' ),
414	[],
415	array( 'dashboard' ),
416	0,
417	1
418	),*/
419	'lp-widgets-admin' => new LP_Asset_Key(
420	self::url( 'js/dist/admin/pages/widgets' . self::$_min_assets . '.js' ),
421	array(
422	'wp-url',
423	'wp-api-fetch',
424	'lodash',
425	'select2',
426	),
427	array( 'widgets', 'elementor' ),
428	0,
429	1
430	),
431	'lp-admin-notices' => new LP_Asset_Key(
432	self::url( 'js/dist/admin/admin-notices' . self::$_min_assets . '.js' ),
433	array(),
434	array(),
435	1,
436	0,
437	'',
438	array( 'strategy' => 'async' )
439	),
440	'lp-material' => new LP_Asset_Key(
441	$this->url( 'js/dist/admin/course-material' . self::$_min_assets . '.js' ),
442	array(),
443	array(
444	LP_COURSE_CPT,
445	LP_LESSON_CPT,
446	),
447	0,
448	1
449	),
450	'lp-list-students-enrolled' => new LP_Asset_Key(
451	$this->url( 'dist/js/admin/list-students-enrolled' . self::$_min_assets . '.js' ),
452	array( 'lp-load-ajax' ),
453	array( 'learnpress_page_learn-press-students-enrolled' ),
454	0,
455	0,
456	'',
457	array( 'strategy' => 'async' )
458	),
459	'lp-admin-tools' => new LP_Asset_Key(
460	$this->url( 'js/dist/admin/admin-tools' . self::$_min_assets . '.js' ),
461	array(),
462	array( 'learnpress_page_learn-press-tools' ),
463	0,
464	1,
465	'',
466	array( 'strategy' => 'defer' )
467	),
468	'lp-admin-statistic' => new LP_Asset_Key(
469	$this->url( 'js/dist/admin/admin-statistic' . self::$_min_assets . '.js' ),
470	array( 'wp-api-fetch' ),
471	array( 'learnpress_page_learn-press-statistics' ),
472	0,
473	0,
474	'',
475	array( 'strategy' => 'defer' )
476	),
477	)
478	);
479
480	/*
481	$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
482	if ( $screen && $screen->id === 'site-editor' ) {
483	$scripts['editor-check'] = new LP_Asset_Key(
484	self::url( 'js/dist/gutenberg/editor-check' . self::$_min_assets . '.js' ),
485	array(
486	'wp-data',
487	'wp-edit-post',
488	'wp-editor',
489	),
490	[],
491	0,
492	0,
493	'1.0.0',
494	[ 'strategy' => 'defer' ]
495	);
496	}*/
497
498	return $scripts;
499	}
500
501	/**
502	* Get default styles in admin.
503	*
504	* @return mixed
505	*/
506	protected function _get_styles(): array {
507	$is_rtl = is_rtl() ? '-rtl' : '';
508
509	return apply_filters(
510	'learn-press/admin-default-styles',
511	array(
512	/*'select2' => new LP_Asset_Key(
513	$this->url( 'src/css/vendor/select2.min.css' )
514	),*/
515	/*
516	'font-awesome' => new LP_Asset_Key(
517	$this->url( 'src/css/vendor/font-awesome-5.min.css' )
518	),*/
519	/*
520	'jquery-ui' => new LP_Asset_Key(
521	$this->url( 'src/css/vendor/jquery-ui/jquery-ui.min.css' )
522	),
523	'jquery-ui-timepicker' => new LP_Asset_Key(
524	$this->url( 'src/css/vendor/jquery-ui-timepicker-addon.css' )
525	),*/
526	'jquery-tipsy' => new LP_Asset_Key(
527	$this->url( 'src/css/vendor/jquery.tipsy.css' )
528	),
529	'learn-press-admin' => new LP_Asset_Key(
530	$this->url( 'css/admin/admin' . $is_rtl . self::$_min_assets . '.css' ),
531	array(
532	'wp-color-picker',
533	'wp-components',
534	// 'select2',
535	// 'jquery-ui',
536	// 'jquery-ui-timepicker',
537	// 'font-awesome',
538	'jquery-tipsy',
539	),
540	array(),
541	0
542	),
543	'lp-edit-curriculum' => new LP_Asset_Key(
544	$this->url( 'css/edit-curriculum' . $is_rtl . self::$_min_assets . '.css' ),
545	array(),
546	array(),
547	1
548	),
549	'lp-edit-quiz' => new LP_Asset_Key(
550	$this->url( 'css/edit-quiz' . $is_rtl . self::$_min_assets . '.css' ),
551	array(),
552	array(),
553	1
554	),
555	'lp-edit-question' => new LP_Asset_Key(
556	$this->url( 'css/edit-question' . $is_rtl . self::$_min_assets . '.css' ),
557	array(),
558	array(),
559	1
560	),
561	'learn-press-statistic' => new LP_Asset_Key(
562	LP_CSS_URL . 'admin/statistic' . $is_rtl . self::$_min_assets . '.css',
563	array(),
564	array( 'learners_page_learn-press-statistics' ),
565	0
566	),
567	'lp-tom-select' => new LP_Asset_Key(
568	$this->url( 'src/css/vendor/tom-select.min.css' ),
569	array(),
570	array(),
571	0
572	),
573	)
574	);
575	}
576
577	/**
578	* Register and enqueue needed js and styles
579	*/
580	public function load_scripts() {
581	$screen_id = LP_Admin::instance()->get_screen_id();
582
583	if ( empty( $screen_id ) ) {
584	return;
585	}
586
587	// wp_enqueue_media(); //Todo: tungnx need check why call for that using.
588	$this->handle_js( $screen_id );
589	$this->handle_style( $screen_id );
590
591	do_action( 'learn-press/admin/after-enqueue-scripts' );
592	}
593
594	/**
595	* Show overlay
596	*/
597	public function add_elements_global() {
598	echo '<div class="lp-overlay">';
599	apply_filters( 'learnpress/admin/modal-dialog', learn_press_get_template( 'global/lp-modal-overlay' ) );
600	echo '</div>';
601
602	apply_filters( 'learnpress/admin/steps', learn_press_get_template( 'global/lp-group-step' ) );
603
604	// Added notify message when action done.
605	Template::instance()->get_admin_template( 'global/notify-action.php' );
606	}
607
608	/**
609	* Get course data for Vue Editor Course use.
610	*
611	* @return array\|mixed\|null
612	* @deprecated 4.4.2 - no any enqueue js for that.
613	*/
614	/*public function get_course_data_for_editor_vue() {
615	global $post, $pagenow;
616
617	if ( empty( $post ) \|\| ( get_post_type() !== LP_COURSE_CPT ) \|\| ! in_array(
618	$pagenow,
619	array(
620	'post.php',
621	'post-new.php',
622	)
623	) ) {
624	return array();
625	}
626
627	$course = CourseModel::find( $post->ID, true );
628	if ( $course ) {
629	$course_section_items = $course->get_section_items();
630	} else { // Code old if not found course on the table learnpress_courses.
631	$course = learn_press_get_course( $post->ID );
632	$course_section_items = $course->get_curriculum_raw();
633	}
634	$hidden_sections = get_post_meta( $post->ID, '_admin_hidden_sections', true );
635
636	return apply_filters(
637	'learn-press/admin-localize-course-editor',
638	array(
639	'root' => array(
640	'course_id' => $post->ID,
641	'auto_draft' => get_post_status( $post->ID ) == 'auto-draft',
642	'ajax' => admin_url( 'index.php' ),
643	'disable_curriculum' => false,
644	'action' => 'admin_course_editor',
645	'nonce' => wp_create_nonce( 'learnpress_update_curriculum' ),
646	),
647	'chooseItems' => array(
648	'types' => learn_press_course_get_support_item_types(),
649	'open' => false,
650	'addedItems' => array(),
651	'items' => array(),
652	),
653	'i18n' => array(
654	'item' => __( 'item', 'learnpress' ),
655	'new_section_item' => __( 'Create a new', 'learnpress' ),
656	'back' => __( 'Back', 'learnpress' ),
657	'selected_items' => __( 'Selected items', 'learnpress' ),
658	'confirm_remove_item' => __( 'Do you want to remove the "{{ITEM_NAME}}" item from the course?', 'learnpress' ),
659	'confirm_trash_item' => __( 'Do you want to move the "{{ITEM_NAME}}" item to the trash?', 'learnpress' ),
660	'item_labels' => array(
661	'singular' => __( 'Item', 'learnpress' ),
662	'plural' => __( 'Items', 'learnpress' ),
663	),
664	'notice_sale_price' => __( 'The course sale price must be less than the regular price', 'learnpress' ),
665	'notice_price' => __( 'The course price must be greater than the sale price', 'learnpress' ),
666	'notice_sale_start_date' => __( 'The sale start date must be before the sale end date', 'learnpress' ),
667	'notice_sale_end_date' => __( 'The sale end date must be after the sale start date', 'learnpress' ),
668	'notice_invalid_date' => __( 'Invalid date', 'learnpress' ),
669	),
670	'sections' => array(
671	'sections' => $course_section_items,
672	'hidden_sections' => ! empty( $hidden_sections ) ? $hidden_sections : array(),
673	'urlEdit' => admin_url( 'post.php?action=edit&post=' ),
674	),
675	)
676	);
677	}*/
678
679	public static function instance() {
680	if ( ! is_admin() ) {
681	return null;
682	}
683
684	if ( ! self::$_instance ) {
685	self::$_instance = new self();
686	}
687
688	return self::$_instance;
689	}
690	}
691
692	/**
693	* Shortcut function to get instance of LP_Admin_Assets
694	*
695	* @return LP_Admin_Assets\|null
696	* Addon Certificate, Import/Export is using.
697	*/
698	function learn_press_admin_assets() {
699	return LP_Admin_Assets::instance();
700	}
701