|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/* |
|
4
|
|
|
* This file is part of the league/commonmark-extras package. |
|
5
|
|
|
* |
|
6
|
|
|
* (c) Colin O'Dell <[email protected]> |
|
7
|
|
|
* |
|
8
|
|
|
* Original code based on the CommonMark JS reference parser (http://bitly.com/commonmark-js) |
|
9
|
|
|
* - (c) John MacFarlane |
|
10
|
|
|
* |
|
11
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
12
|
|
|
* file that was distributed with this source code. |
|
13
|
|
|
*/ |
|
14
|
|
|
|
|
15
|
|
|
namespace League\CommonMark\Extras\TwitterHandleAutolink; |
|
16
|
|
|
|
|
17
|
|
|
use League\CommonMark\Inline\Element\Link; |
|
18
|
|
|
use League\CommonMark\Inline\Parser\AbstractInlineParser; |
|
19
|
|
|
use League\CommonMark\InlineParserContext; |
|
20
|
|
|
|
|
21
|
|
|
class TwitterHandleParser extends AbstractInlineParser |
|
22
|
|
|
{ |
|
23
|
12 |
|
public function getCharacters() |
|
24
|
|
|
{ |
|
25
|
12 |
|
return ['@']; |
|
26
|
|
|
} |
|
27
|
|
|
|
|
28
|
12 |
|
public function parse(InlineParserContext $inlineContext) |
|
29
|
|
|
{ |
|
30
|
12 |
|
$cursor = $inlineContext->getCursor(); |
|
31
|
|
|
|
|
32
|
|
|
// The @ symbol must not have any other characters immediately prior |
|
33
|
12 |
|
$previousChar = $cursor->peek(-1); |
|
34
|
12 |
|
if ($previousChar !== null && $previousChar !== ' ') { |
|
35
|
|
|
// peek() doesn't modify the cursor, so no need to restore state first |
|
36
|
3 |
|
return false; |
|
37
|
|
|
} |
|
38
|
|
|
|
|
39
|
|
|
// Save the cursor state in case we need to rewind and bail |
|
40
|
9 |
|
$previousState = $cursor->saveState(); |
|
41
|
|
|
|
|
42
|
|
|
// Advance past the @ symbol to keep parsing simpler |
|
43
|
9 |
|
$cursor->advance(); |
|
44
|
|
|
|
|
45
|
|
|
// Parse the handle |
|
46
|
9 |
|
$handle = $cursor->match('/^[A-Za-z0-9_]{1,15}(?!\w)/'); |
|
47
|
9 |
|
if (empty($handle)) { |
|
48
|
|
|
// Regex failed to match; this isn't a valid Twitter handle |
|
49
|
3 |
|
$cursor->restoreState($previousState); |
|
50
|
|
|
|
|
51
|
3 |
|
return false; |
|
52
|
|
|
} |
|
53
|
|
|
|
|
54
|
6 |
|
$profileUrl = 'https://twitter.com/' . $handle; |
|
55
|
|
|
|
|
56
|
6 |
|
$inlineContext->getContainer()->appendChild(new Link($profileUrl, '@' . $handle)); |
|
57
|
|
|
|
|
58
|
6 |
|
return true; |
|
59
|
|
|
} |
|
60
|
|
|
} |
|
61
|
|
|
|
thephpleague /
commonmark-extras
