betterdocs / public / class-betterdocs-toc.php

class-betterdocs-toc.php in BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot 2.3.5, at public/class-betterdocs-toc.php

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1	<?php
2
3	class Node {
4	public $title;
5	public $tag;
6	public $tag_number;
7	public $key;
8
9	public function print( $items, $toc_hierarchy, $level ){
10	$html = '';
11	if( ! empty ( $items ) ) {
12	$toc_hierarchy_class = ( $toc_hierarchy != 'off' && $toc_hierarchy != '' ) ? 'toc-list betterdocs-hierarchial-toc' : 'toc-list';
13	$html .= $level === 1 ? '<ul class = "'.$toc_hierarchy_class.'">' : '<ul class = "betterdocs-toc-list-level-'.$level.'">';
14	foreach( $items as $item ) {
15	$html .= '<li class = "betterdocs-toc-heading-level-'.($item->key).'">';
16	$html .= '<a href="#'.$item->tag_number.'">'.strip_tags( $item->title ).'</a>';
17	if( ! empty ( $items ) ) {
18	$html .= $this->print( $item->items, $toc_hierarchy, ++$level );
19	} else {
20	$level = 1;
21	break;
22	}
23	$html .= '</li>';
24	}
25	$html .= '</ul>';
26	}
27	return $html;
28	}
29	}
30
31
32	class Betterdocs_TOC{
33
34	public function __construct() {
35	add_shortcode( 'betterdocs_toc', array( $this, 'betterdocs_toc' ) );
36	}
37
38	public function betterdocs_toc( $atts )
39	{
40	do_action( 'betterdocs_before_shortcode_load' );
41
42	$get_args = shortcode_atts(
43	array(
44	'post_type' => 'docs',
45	'post_id' => get_the_ID(),
46	'htags' => '1,2,3,4,5,6',
47	'hierarchy' => '',
48	'list_number' => '',
49	'collapsible_on_mobile' => '',
50	'toc_title' => '',
51	),
52	$atts
53	);
54
55	$get_post = get_post( $get_args['post_id'] );
56	$post_content = $get_post->post_content;
57
58	return self::betterdocs_toc_content(
59	$post_content,
60	$get_args['htags'],
61	$get_args['hierarchy'],
62	$get_args['list_number'],
63	$get_args['collapsible_on_mobile'],
64	$get_args['toc_title']
65	);
66	}
67
68	public static function betterdocs_toc_content( $content, $htags, $toc_hierarchy, $list_number, $collapsible, $toc_title='' ) {
69	$html = '';
70	$toc_data = self::format_toc_data( $content, $htags, $toc_hierarchy );
71
72	if ( ! empty( $toc_data->items ) ) {
73	$toc_class = array( 'betterdocs-toc' );
74	if ( empty( $toc_title ) ) {
75	$toc_title = BetterDocs_DB::get_settings('toc_title') ? BetterDocs_DB::get_settings('toc_title') : esc_html__( 'Table of Contents', 'betterdocs' );
76	$toc_title = stripslashes($toc_title);
77	}
78
79	if ( $collapsible == '1' ) {
80	$toc_class[] = 'collapsible-sm';
81	$collapsible_arrow = "<svg class='angle-icon angle-up' aria-hidden='true' focusable='false' data-prefix='fas' data-icon='angle-up' class='svg-inline--fa fa-angle-up fa-w-10' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 320 512'><path fill='currentColor' d='M177 159.7l136 136c9.4 9.4 9.4 24.6 0 33.9l-22.6 22.6c-9.4 9.4-24.6 9.4-33.9 0L160 255.9l-96.4 96.4c-9.4 9.4-24.6 9.4-33.9 0L7 329.7c-9.4-9.4-9.4-24.6 0-33.9l136-136c9.4-9.5 24.6-9.5 34-.1z'></path></svg><svg class='angle-icon angle-down' aria-hidden='true' focusable='false' data-prefix='fas' data-icon='angle-down' class='svg-inline--fa fa-angle-down fa-w-10' role='img' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 320 512'><path fill='currentColor' d='M143 352.3L7 216.3c-9.4-9.4-9.4-24.6 0-33.9l22.6-22.6c9.4-9.4 24.6-9.4 33.9 0l96.4 96.4 96.4-96.4c9.4-9.4 24.6-9.4 33.9 0l22.6 22.6c9.4 9.4 9.4 24.6 0 33.9l-136 136c-9.2 9.4-24.4 9.4-33.8 0z'></path></svg>";
82	} else {
83	$collapsible_arrow = null;
84	}
85
86	if ( $list_number == '1' ) {
87	$toc_class[] = 'toc-list-number';
88	}
89
90	$html = '<div class="' . implode( ' ', $toc_class ) . '">';
91	$html .= '<span class="toc-title">' . $toc_title . $collapsible_arrow . '</span>';
92	$html .= $toc_data->print( $toc_data->items, $toc_hierarchy, 1 );
93	$html .='</div>';
94	}
95
96	return $html;
97	}
98
99	/**
100	* This method is responsible for re-arranging the TOC data based on hierarchy or non-hierarchy
101	*
102	* @param string $post_content
103	* @param string $htag_support
104	* @return object
105	*/
106	public static function format_toc_data( $post_content, $htag_support, $toc_hierarchy )
107	{
108	$matches = array();
109
110	if( $htag_support != '' ) {
111	preg_match_all( '/(<h(['.$htag_support.']{1})[^>]>).<\/h\2>/msuU', $post_content, $matches, PREG_SET_ORDER );
112	}
113
114	if( ! empty( $matches ) ) {
115
116	/*
117	\|--------------------------------------------------------------------------
118	\| Backtracking Algorithm Using Iteration \| Main Login For Hierarchy TOC
119	\|--------------------------------------------------------------------------
120	\|
121	\| Initially an object with key null and empty item of arrays are inserted into the stack of arrays.
122	\| When inside the loop condition for the first time, the last stack value is assigned in a variable $last_data.
123	\| And a new node object $new_data which is instantiated and the tag number is inserted for comparison as key, and empty items
124	\| as a array are inserted into items property of the new node object. On the 'if' condition it checks, if the current tag number
125	\| is smaller or equal to the last stack number. If the condition is true, the it enters into the while loop condition, which also
126	\| checks if the current last stack tag number is greater or equal to the current tag number. It pops values from the stack until and unless the
127	\| condition becomes false. The while loop condition becomes false only when the last stack value tag number becomes null and the last stack number is not
128	\| greater or equal to the current node tag number.
129	\|
130	\| Backtracking occurs when the current tag_number $number[2] is less than or equal to the stacks last tag_number which is assigned as $last_data
131	\|
132	\| And then the last value is inserted as the new last_data, and the new_data node is inserted into the last_data node items.
133	\| Additionally the $new_data is inserted into the stack to keep track of the used node. Somehow if the if condition becomes false
134	\| then the stack last data is taken, and the new_data is inserted into the last_data->items and the new_data is inserted into the stack.
135	\|
136	*/
137
138	$stack = array();
139	$root = new Node();
140	$root->key = null;
141	$root->items = array();
142	$tag_counter = 0;
143
144	array_push( $stack, $root );
145
146	foreach( $matches as $number ) {
147	$last_data = $stack[count($stack) - 1];
148	$current_tag_number = isset( $number[2] ) ? $number[2] : '';
149	$current_title = isset( $number[0] ) ? $number[0] : '';
150	$current_tag = isset( $number[1] ) ? $number[1] : '';
151
152	// Get The Heading Name & Heading ID using REGEX
153	$heading_name = preg_replace( '/<[^<]+?>/', '', $current_title );
154	$heading_name = ! empty( $heading_name ) ? strtolower( str_replace( " ", '-', preg_replace('/<[^>]+>\|[^a-zA-Z\s\d]+/', "", html_entity_decode( $heading_name ) ) ) ) : '';
155	preg_match('/id="(.+?)"/', $current_title, $id_matches);
156	$heading_id = isset( $id_matches[1] ) ? strtolower( $id_matches[1] ) : '';
157
158	$tag_number = ! empty( $heading_id ) ? $heading_id : ( ! empty( $heading_name ) && BetterDocs_DB::get_settings('toc_dynamic_title') != 'off' ? $heading_name : $tag_counter . '-toc-title' );
159
160	$new_data = new Node();
161	$new_data->key = $current_tag_number;
162	$new_data->tag = $current_tag;
163	$new_data->title = $current_title;
164	$new_data->tag_number = $tag_number;
165	$new_data->items = array();
166
167	if( $last_data->key != null && $current_tag_number <= $last_data->key ) {
168	while( $stack[count($stack) - 1]->key != null && $stack[count($stack) - 1]->key >= $current_tag_number ) {
169	array_pop( $stack );
170	}
171	$last_data = $stack[count($stack) - 1];
172	}
173
174	array_push( $last_data->items, $new_data );
175
176	if( $toc_hierarchy != 'off' && $toc_hierarchy != '' ) {
177	array_push( $stack, $new_data );
178	}
179
180	$tag_counter++;
181	}
182
183	return $root;
184
185	}
186	}
187	}
188
189	new Betterdocs_TOC();