|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* This file contains functionality related to parsing Markdown across BZiON |
|
4
|
|
|
* |
|
5
|
|
|
* @package BZiON |
|
6
|
|
|
* @license https://github.com/allejo/bzion/blob/master/LICENSE.md GNU General Public License Version 3 |
|
7
|
|
|
*/ |
|
8
|
|
|
|
|
9
|
|
|
namespace BZIon; |
|
10
|
|
|
|
|
11
|
|
|
/** |
|
12
|
|
|
* This class extends Parsedown and adds functionality to enable or disable functionality |
|
13
|
|
|
*/ |
|
14
|
|
|
class MarkdownEngine extends \Parsedown |
|
15
|
|
|
{ |
|
16
|
|
|
/** |
|
17
|
|
|
* Whether or not to allow images to be rendered. If set to false, it'll be rendered as a hyperlink |
|
18
|
|
|
* @var bool |
|
19
|
|
|
*/ |
|
20
|
|
|
protected $allowImages; |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* Store all of the settings related to Camo |
|
24
|
|
|
* @var array |
|
25
|
|
|
*/ |
|
26
|
|
|
private $camo; |
|
27
|
|
|
|
|
28
|
|
|
/** |
|
29
|
|
|
* Constructor for our extension of Parsedown |
|
30
|
|
|
*/ |
|
31
|
1 |
|
public function __construct() |
|
32
|
|
|
{ |
|
33
|
1 |
|
$this->camo = array(); |
|
34
|
1 |
|
$this->camo['enabled'] = \Service::getParameter('bzion.features.camo.enabled'); |
|
35
|
|
|
|
|
36
|
1 |
|
if ($this->camo['enabled']) { |
|
37
|
|
|
$this->camo['key'] = \Service::getParameter('bzion.features.camo.key'); |
|
38
|
|
|
$this->camo['base_url'] = \Service::getParameter('bzion.features.camo.base_url'); |
|
39
|
|
|
$this->camo['whitelisted_domains'] = \Service::getParameter('bzion.features.camo.whitelisted_domains'); |
|
40
|
|
|
} |
|
41
|
1 |
|
} |
|
42
|
|
|
|
|
43
|
|
|
/** |
|
44
|
|
|
* Overload the function to either return nothing (if image image rendering is disable) or return the |
|
45
|
|
|
* rendered image by calling the Parsedown function |
|
46
|
|
|
* |
|
47
|
|
|
* @param string $Excerpt The excerpt of text to be processed as an image |
|
48
|
|
|
* |
|
49
|
|
|
* @return array|null|void |
|
50
|
|
|
*/ |
|
51
|
|
|
protected function inlineImage($Excerpt) |
|
52
|
|
|
{ |
|
53
|
|
|
if ($this->allowImages) { |
|
54
|
|
|
$Image = parent::inlineImage($Excerpt); |
|
55
|
|
|
|
|
56
|
|
|
if ($this->camo['enabled']) { |
|
57
|
|
|
$parts = parse_url($Image['element']['attributes']['src']); |
|
58
|
|
|
|
|
59
|
|
|
if (!isset($parts['host']) || strlen($parts['host']) === 0) { |
|
60
|
|
|
return null; |
|
61
|
|
|
} |
|
62
|
|
|
|
|
63
|
|
|
if (!in_array($parts['host'], $this->camo['whitelisted_domains'])) { |
|
64
|
|
|
$Image['element']['attributes']['src'] = $this->camo['base_url'] . hash_hmac('sha1', $Image['element']['attributes']['src'], $this->camo['key']) . '/' . bin2hex($Image['element']['attributes']['src']); |
|
65
|
|
|
} |
|
66
|
|
|
} |
|
67
|
|
|
|
|
68
|
|
|
return $Image; |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
|
|
return null; |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
/** |
|
75
|
|
|
* Overload the function replace the scheme + host of the link if belongs to the current website serving the link. |
|
76
|
|
|
* This will prevent CSS rules from treating full URLs as external links. |
|
77
|
|
|
* |
|
78
|
|
|
* @param array $Excerpt The structure of the link to be processed |
|
79
|
|
|
* |
|
80
|
|
|
* @return array |
|
81
|
|
|
*/ |
|
82
|
|
|
protected function inlineLink($Excerpt) |
|
83
|
|
|
{ |
|
84
|
|
|
$link = parent::inlineLink($Excerpt); |
|
85
|
|
|
|
|
86
|
|
|
if (isset($link['element']['attributes']['href'])) { |
|
87
|
|
|
$href = &$link['element']['attributes']['href']; |
|
88
|
|
|
|
|
89
|
|
|
if (strpos($href, $scheme = \Service::getRequest()->getSchemeAndHttpHost()) === 0) { |
|
90
|
|
|
$href = str_replace($scheme, '', $href); |
|
91
|
|
|
} |
|
92
|
|
|
} |
|
93
|
|
|
|
|
94
|
|
|
return $link; |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
|
|
/** |
|
98
|
|
|
* Overload this function to add IDs to the headings (with pound signs) so they can be used as anchors |
|
99
|
|
|
* |
|
100
|
|
|
* @param array $Line |
|
101
|
|
|
* |
|
102
|
|
|
* @return array|null |
|
103
|
|
|
*/ |
|
104
|
|
|
protected function blockHeader($Line) |
|
105
|
|
|
{ |
|
106
|
|
|
$Block = parent::blockHeader($Line); |
|
107
|
|
|
|
|
108
|
|
|
if (isset($Block['element']['text'])) |
|
109
|
|
|
{ |
|
110
|
|
|
$Block['element']['attributes']['id'] = $this->slugifyHeader($Block); |
|
111
|
|
|
} |
|
112
|
|
|
|
|
113
|
|
|
return $Block; |
|
114
|
|
|
} |
|
115
|
|
|
|
|
116
|
|
|
/** |
|
117
|
|
|
* Overload this function to add IDs to headings (with horizontal dashes) so they can be used as anchors |
|
118
|
|
|
* |
|
119
|
|
|
* @param array $Line |
|
120
|
|
|
* @param array|null $Block |
|
121
|
|
|
* |
|
122
|
|
|
* @return array|null |
|
123
|
|
|
*/ |
|
124
|
1 |
|
protected function blockSetextHeader($Line, array $Block = null) |
|
125
|
|
|
{ |
|
126
|
1 |
|
$Block = parent::blockSetextHeader($Line, $Block); |
|
127
|
|
|
|
|
128
|
1 |
|
if (isset($Block['element']['name'])) |
|
129
|
|
|
{ |
|
130
|
|
|
$element = $Block['element']['name']; |
|
131
|
|
|
|
|
132
|
|
|
if ($element == 'h1' || $element == 'h2') |
|
133
|
|
|
{ |
|
134
|
|
|
$Block['element']['attributes']['id'] = $this->slugifyHeader($Block); |
|
135
|
|
|
} |
|
136
|
|
|
} |
|
137
|
|
|
|
|
138
|
1 |
|
return $Block; |
|
139
|
|
|
} |
|
140
|
|
|
|
|
141
|
|
|
private function slugifyHeader($Block) |
|
142
|
|
|
{ |
|
143
|
|
|
$id = strtolower($Block['element']['text']); |
|
144
|
|
|
$id = str_replace(' ', '-', $id); |
|
145
|
|
|
$id = preg_replace('/[^0-9a-zA-Z-_]/', '', $id); |
|
146
|
|
|
|
|
147
|
|
|
return preg_replace('/-+/', '-', $id); |
|
148
|
|
|
} |
|
149
|
|
|
|
|
150
|
|
|
/** |
|
151
|
|
|
* Disable or enable Parsedown from rendering images |
|
152
|
|
|
* |
|
153
|
|
|
* @param bool $allowImages Whether to allow images to be rendered or not |
|
154
|
|
|
*/ |
|
155
|
1 |
|
public function setAllowImages($allowImages) |
|
156
|
|
|
{ |
|
157
|
1 |
|
$this->allowImages = $allowImages; |
|
158
|
1 |
|
} |
|
159
|
|
|
} |
|
160
|
|
|
|
allejo /
bzion
