learnpress / inc / lesson / class-lp-lesson.php

class-lp-lesson.php in LearnPress – WordPress LMS Plugin for Create and Sell Online Courses 4.1.7.2, at inc/lesson/class-lp-lesson.php

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1	<?php
2	/**
3	* Class LP_Lesson.
4	*
5	* @author ThimPress
6	* @package LearnPress/Classes
7	* @version 3.0.0
8	*/
9
10	/**
11	* Prevent loading this file directly
12	*/
13	defined( 'ABSPATH' ) \|\| exit();
14
15	if ( ! function_exists( 'LP_Lesson' ) ) {
16
17	/**
18	* Class LP_Lesson.
19	*/
20	class LP_Lesson extends LP_Course_Item {
21
22	/**
23	* @var mixed\|string\|void
24	*/
25	public $content = '';
26
27	/**
28	*
29	* @var string
30	*/
31	public $lesson_type = null;
32
33	/**
34	* @var string
35	*/
36	protected $_item_type = LP_LESSON_CPT;
37
38	/**
39	* @var int
40	*/
41	protected static $_loaded = 0;
42
43	/**
44	* LP_Lesson constructor.
45	*
46	* @param $lesson
47	* @param string $args
48	*
49	* @throws Exception
50	*/
51	public function __construct( $lesson, $args = '' ) {
52	parent::__construct( $lesson, $args );
53	$this->_curd = new LP_Lesson_CURD();
54
55	if ( $this->get_id() > 0 ) {
56	$this->load();
57	}
58
59	self::$_loaded ++;
60	if ( self::$_loaded == 1 ) {
61	add_filter( 'debug_data', array( __CLASS__, 'log' ) );
62	}
63	}
64
65	/**
66	* Read course data, curriculum: sections, items, etc...
67	*
68	* @since 3.0.0
69	*
70	* @throws Exception
71	*/
72	public function load() {
73	$this->_curd->load( $this );
74	}
75
76	/**
77	* Debug log.
78	*
79	* @param $data
80	*
81	* @return array
82	*/
83	public static function log( $data ) {
84	$data[] = __CLASS__ . '( ' . self::$_loaded . ' )';
85
86	return $data;
87	}
88
89	/**
90	* @param $tag
91	*
92	* @return mixed
93	* @throws Exception
94	*/
95	public function is( $tag ) {
96	_deprecated_function( __FUNCTION__, '3.0.8' );
97	$args = func_get_args();
98	unset( $args[0] );
99	$method = 'is_' . preg_replace( '!-!', '_', $tag );
100	$callback = array( $this, $method );
101	if ( is_callable( $callback ) ) {
102	return call_user_func_array( $callback, $args );
103	} else {
104	throw new Exception( sprintf( __( 'The function %s doesn\'t exist', 'learnpress' ), $tag ) );
105	}
106	}
107
108	/**
109	* Get LP Lesson.
110	*
111	* @param mixed $the_lesson
112	* @param array $args
113	*
114	* @return LP_Lesson\|bool
115	*/
116	public static function get_lesson( $the_lesson = false, $args = array() ) {
117
118	if ( is_numeric( $the_lesson ) && isset( LP_Global::$lessons[ $the_lesson ] ) ) {
119	return LP_Global::$lessons[ $the_lesson ];
120	}
121
122	$the_lesson = self::get_lesson_object( $the_lesson );
123
124	if ( ! $the_lesson ) {
125	return false;
126	}
127
128	if ( isset( LP_Global::$lessons[ $the_lesson->ID ] ) ) {
129	return LP_Global::$lessons[ $the_lesson->ID ];
130	}
131
132	if ( ! empty( $args['force'] ) ) {
133	$force = ! ! $args['force'];
134	unset( $args['force'] );
135	} else {
136	$force = false;
137	}
138
139	$key_args = wp_parse_args(
140	$args,
141	array(
142	'id' => $the_lesson->ID,
143	'type' => $the_lesson->post_type,
144	)
145	);
146
147	$key = LP_Helper::array_to_md5( $key_args );
148
149	if ( $force ) {
150	LP_Global::$lessons[ $key ] = false;
151	LP_Global::$lessons[ $the_lesson->ID ] = false;
152	}
153
154	if ( empty( LP_Global::$lessons[ $key ] ) ) {
155	$class_name = self::get_lesson_class( $the_lesson, $args );
156	if ( is_string( $class_name ) && class_exists( $class_name ) ) {
157	$lesson = new $class_name( $the_lesson->ID, $args );
158	} elseif ( $class_name instanceof LP_Course_Item ) {
159	$lesson = $class_name;
160	} else {
161	$lesson = new self( $the_lesson->ID, $args );
162	}
163	LP_Global::$lessons[ $key ] = $lesson;
164	LP_Global::$lessons[ $the_lesson->ID ] = $lesson;
165	}
166
167	return LP_Global::$lessons[ $key ];
168	}
169
170	/**
171	* Get default meta.
172	*
173	* @since 3.0.0
174	*
175	* @return mixed
176	*/
177	public static function get_default_meta() {
178	$meta = array(
179	'duration' => '0 minute',
180	'preview' => 'no',
181	);
182
183	return apply_filters( 'learn-press/course/lesson/default-meta', $meta );
184	}
185
186	/**
187	* Get duration of lesson
188	*
189	* @return LP_Duration
190	*/
191	public function get_duration() {
192	$duration = parent::get_duration();
193
194	return apply_filters( 'learn-press/lesson-duration', $duration, $this->get_id() );
195	}
196
197	/**
198	* @param string $lesson_type
199	*
200	* @return string\|false
201	*/
202	private static function get_class_name_from_lesson_type( $lesson_type ) {
203	return LP_LESSON_CPT === $lesson_type ? __CLASS__ : 'LP_Lesson_' . implode( '_', array_map( 'ucfirst', explode( '-', $lesson_type ) ) );
204	}
205
206	/**
207	* Get the lesson class name
208	*
209	* @param WP_Post $the_lesson
210	* @param array $args (default: array())
211	*
212	* @return string
213	*/
214	private static function get_lesson_class( $the_lesson, $args = array() ) {
215	$lesson_id = absint( $the_lesson->ID );
216	$type = $the_lesson->post_type;
217
218	$class_name = self::get_class_name_from_lesson_type( $type );
219
220	// Filter class name so that the class can be overridden if extended.
221	return apply_filters( 'learn-press/lesson/object-class', $class_name, $type, $lesson_id );
222	}
223
224	/**
225	* Get the lesson object
226	*
227	* @param mixed $the_lesson
228	*
229	* @uses WP_Post
230	* @return WP_Post\|bool false on failure
231	*/
232	private static function get_lesson_object( $the_lesson ) {
233	if ( false === $the_lesson ) {
234	$the_lesson = get_post_type() === LP_LESSON_CPT ? $GLOBALS['post'] : false;
235	} elseif ( is_numeric( $the_lesson ) ) {
236	$the_lesson = get_post( $the_lesson );
237	} elseif ( $the_lesson instanceof LP_Course_Item ) {
238	$the_lesson = get_post( $the_lesson->get_id() );
239	} elseif ( ! ( $the_lesson instanceof WP_Post ) ) {
240	$the_lesson = false;
241	}
242
243	return apply_filters( 'learn-press/lesson/post-object', $the_lesson );
244	}
245	}
246	}
247