/
TokenParser.php
206 lines (184 loc) · 6.16 KB
/
TokenParser.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
<?php
namespace Doctrine\Common\Annotations;
use function array_merge;
use function count;
use function explode;
use function strtolower;
use function token_get_all;
use const PHP_VERSION_ID;
use const T_AS;
use const T_COMMENT;
use const T_DOC_COMMENT;
use const T_NAME_FULLY_QUALIFIED;
use const T_NAME_QUALIFIED;
use const T_NAMESPACE;
use const T_NS_SEPARATOR;
use const T_STRING;
use const T_USE;
use const T_WHITESPACE;
/**
* Parses a file for namespaces/use/class declarations.
*/
class TokenParser
{
/**
* The token list.
*
* @phpstan-var list<mixed[]>
*/
private $tokens;
/**
* The number of tokens.
*
* @var int
*/
private $numTokens;
/**
* The current array pointer.
*
* @var int
*/
private $pointer = 0;
/** @param string $contents */
public function __construct($contents)
{
$this->tokens = token_get_all($contents);
// The PHP parser sets internal compiler globals for certain things. Annoyingly, the last docblock comment it
// saw gets stored in doc_comment. When it comes to compile the next thing to be include()d this stored
// doc_comment becomes owned by the first thing the compiler sees in the file that it considers might have a
// docblock. If the first thing in the file is a class without a doc block this would cause calls to
// getDocBlock() on said class to return our long lost doc_comment. Argh.
// To workaround, cause the parser to parse an empty docblock. Sure getDocBlock() will return this, but at least
// it's harmless to us.
token_get_all("<?php\n/**\n *\n */");
$this->numTokens = count($this->tokens);
}
/**
* Gets the next non whitespace and non comment token.
*
* @param bool $docCommentIsComment If TRUE then a doc comment is considered a comment and skipped.
* If FALSE then only whitespace and normal comments are skipped.
*
* @return mixed[]|string|null The token if exists, null otherwise.
*/
public function next($docCommentIsComment = true)
{
for ($i = $this->pointer; $i < $this->numTokens; $i++) {
$this->pointer++;
if (
$this->tokens[$i][0] === T_WHITESPACE ||
$this->tokens[$i][0] === T_COMMENT ||
($docCommentIsComment && $this->tokens[$i][0] === T_DOC_COMMENT)
) {
continue;
}
return $this->tokens[$i];
}
return null;
}
/**
* Parses a single use statement.
*
* @return array<string, string> A list with all found class names for a use statement.
*/
public function parseUseStatement()
{
$groupRoot = '';
$class = '';
$alias = '';
$statements = [];
$explicitAlias = false;
while (($token = $this->next())) {
if (! $explicitAlias && $token[0] === T_STRING) {
$class .= $token[1];
$alias = $token[1];
} elseif ($explicitAlias && $token[0] === T_STRING) {
$alias = $token[1];
} elseif (
PHP_VERSION_ID >= 80000 &&
($token[0] === T_NAME_QUALIFIED || $token[0] === T_NAME_FULLY_QUALIFIED)
) {
$class .= $token[1];
$classSplit = explode('\\', $token[1]);
$alias = $classSplit[count($classSplit) - 1];
} elseif ($token[0] === T_NS_SEPARATOR) {
$class .= '\\';
$alias = '';
} elseif ($token[0] === T_AS) {
$explicitAlias = true;
$alias = '';
} elseif ($token === ',') {
$statements[strtolower($alias)] = $groupRoot . $class;
$class = '';
$alias = '';
$explicitAlias = false;
} elseif ($token === ';') {
$statements[strtolower($alias)] = $groupRoot . $class;
break;
} elseif ($token === '{') {
$groupRoot = $class;
$class = '';
} elseif ($token === '}') {
continue;
} else {
break;
}
}
return $statements;
}
/**
* Gets all use statements.
*
* @param string $namespaceName The namespace name of the reflected class.
*
* @return array<string, string> A list with all found use statements.
*/
public function parseUseStatements($namespaceName)
{
$statements = [];
while (($token = $this->next())) {
if ($token[0] === T_USE) {
$statements = array_merge($statements, $this->parseUseStatement());
continue;
}
if ($token[0] !== T_NAMESPACE || $this->parseNamespace() !== $namespaceName) {
continue;
}
// Get fresh array for new namespace. This is to prevent the parser to collect the use statements
// for a previous namespace with the same name. This is the case if a namespace is defined twice
// or if a namespace with the same name is commented out.
$statements = [];
}
return $statements;
}
/**
* Gets the namespace.
*
* @return string The found namespace.
*/
public function parseNamespace()
{
$name = '';
while (
($token = $this->next()) && ($token[0] === T_STRING || $token[0] === T_NS_SEPARATOR || (
PHP_VERSION_ID >= 80000 &&
($token[0] === T_NAME_QUALIFIED || $token[0] === T_NAME_FULLY_QUALIFIED)
))
) {
$name .= $token[1];
}
return $name;
}
/**
* Gets the class name.
*
* @return string The found class name.
*/
public function parseClass()
{
// Namespaces and class names are tokenized the same: T_STRINGs
// separated by T_NS_SEPARATOR so we can use one function to provide
// both.
return $this->parseNamespace();
}
}