|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Overblog\GraphQLBundle\ExpressionLanguage; |
|
6
|
|
|
|
|
7
|
|
|
use Symfony\Component\ExpressionLanguage\Expression; |
|
8
|
|
|
use Symfony\Component\ExpressionLanguage\ExpressionLanguage as BaseExpressionLanguage; |
|
9
|
|
|
use Symfony\Component\ExpressionLanguage\Lexer; |
|
10
|
|
|
use Symfony\Component\ExpressionLanguage\SyntaxError; |
|
11
|
|
|
use Symfony\Component\ExpressionLanguage\Token; |
|
12
|
|
|
use function array_merge; |
|
13
|
|
|
use function strlen; |
|
14
|
|
|
use function strpos; |
|
15
|
|
|
use function substr; |
|
16
|
|
|
|
|
17
|
|
|
class ExpressionLanguage extends BaseExpressionLanguage |
|
18
|
|
|
{ |
|
19
|
|
|
// TODO (murtukov): make names conditional |
|
20
|
|
|
public const KNOWN_NAMES = ['value', 'args', 'context', 'info', 'object', 'validator', 'errors', 'childrenComplexity', 'typeName', 'fieldName']; |
|
21
|
|
|
public const EXPRESSION_TRIGGER = '@='; |
|
22
|
|
|
|
|
23
|
|
|
public array $globalNames = []; |
|
24
|
|
|
|
|
25
|
144 |
|
public function addGlobalName(string $index, string $name): void |
|
26
|
|
|
{ |
|
27
|
144 |
|
$this->globalNames[$index] = $name; |
|
28
|
144 |
|
} |
|
29
|
|
|
|
|
30
|
16 |
|
public function getGlobalNames(): array |
|
31
|
|
|
{ |
|
32
|
16 |
|
return array_values($this->globalNames); |
|
33
|
|
|
} |
|
34
|
|
|
|
|
35
|
|
|
/** |
|
36
|
|
|
* @param string|Expression $expression |
|
37
|
|
|
* |
|
38
|
|
|
* @return string |
|
39
|
|
|
*/ |
|
40
|
53 |
|
public function compile($expression, $names = []) |
|
41
|
|
|
{ |
|
42
|
53 |
|
return parent::compile($expression, array_merge($names, $this->globalNames)); |
|
43
|
|
|
} |
|
44
|
|
|
|
|
45
|
|
|
/** |
|
46
|
|
|
* Checks if expression string containst specific variable. |
|
47
|
|
|
* |
|
48
|
|
|
* Argument can be either an Expression object or a string with or |
|
49
|
|
|
* without a prefix |
|
50
|
|
|
* |
|
51
|
|
|
* @param string $name - name of the searched variable (needle) |
|
52
|
|
|
* @param string|Expression $expression - expression to search in (haystack) |
|
53
|
|
|
* |
|
54
|
|
|
* @throws SyntaxError |
|
55
|
|
|
*/ |
|
56
|
38 |
|
public static function expressionContainsVar(string $name, $expression): bool |
|
57
|
|
|
{ |
|
58
|
38 |
|
foreach (static::extractExpressionVarNames($expression) as $varName) { |
|
59
|
33 |
|
if ($name === $varName) { |
|
60
|
13 |
|
return true; |
|
61
|
|
|
} |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
33 |
|
return false; |
|
65
|
|
|
} |
|
66
|
|
|
|
|
67
|
|
|
/** |
|
68
|
|
|
* @param string|Expression $expression - expression to search in (haystack) |
|
69
|
|
|
* |
|
70
|
|
|
* @throws SyntaxError |
|
71
|
|
|
*/ |
|
72
|
59 |
|
public static function extractExpressionVarNames($expression): iterable |
|
73
|
|
|
{ |
|
74
|
59 |
|
if ($expression instanceof Expression) { |
|
75
|
2 |
|
$expression = $expression->__toString(); |
|
76
|
57 |
|
} elseif (self::stringHasTrigger($expression)) { |
|
77
|
32 |
|
$expression = self::unprefixExpression($expression); |
|
78
|
|
|
} |
|
79
|
|
|
|
|
80
|
|
|
/** @var string $expression */ |
|
81
|
59 |
|
$stream = (new Lexer())->tokenize($expression); |
|
82
|
59 |
|
$current = &$stream->current; |
|
83
|
59 |
|
$isProperty = false; |
|
84
|
59 |
|
$varNames = []; |
|
85
|
|
|
|
|
86
|
59 |
|
while (!$stream->isEOF()) { |
|
87
|
59 |
|
if ('.' === $current->value) { |
|
88
|
28 |
|
$isProperty = true; |
|
89
|
59 |
|
} elseif (Token::NAME_TYPE === $current->type) { |
|
90
|
59 |
|
if (!$isProperty) { |
|
91
|
59 |
|
$name = $current->value; |
|
92
|
|
|
// Also check that it's not a function's name |
|
93
|
59 |
|
$stream->next(); |
|
94
|
59 |
|
if ('(' !== $current->value) { |
|
95
|
53 |
|
$varNames[] = $name; |
|
96
|
|
|
} |
|
97
|
59 |
|
continue; |
|
98
|
|
|
} else { |
|
99
|
28 |
|
$isProperty = false; |
|
100
|
|
|
} |
|
101
|
|
|
} |
|
102
|
|
|
|
|
103
|
58 |
|
$stream->next(); |
|
104
|
|
|
} |
|
105
|
|
|
|
|
106
|
59 |
|
return $varNames; |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
|
|
/** |
|
110
|
|
|
* Checks if value is a string and has the expression trigger prefix. |
|
111
|
|
|
* |
|
112
|
|
|
* @param mixed $value |
|
113
|
|
|
*/ |
|
114
|
37 |
|
public static function isStringWithTrigger($value): bool |
|
115
|
|
|
{ |
|
116
|
37 |
|
if (is_string($value)) { |
|
117
|
37 |
|
return self::stringHasTrigger($value); |
|
118
|
|
|
} |
|
119
|
|
|
|
|
120
|
3 |
|
return false; |
|
121
|
|
|
} |
|
122
|
|
|
|
|
123
|
|
|
/** |
|
124
|
|
|
* Checks if a string has the expression trigger prefix. |
|
125
|
|
|
*/ |
|
126
|
65 |
|
public static function stringHasTrigger(string $maybeExpression): bool |
|
127
|
|
|
{ |
|
128
|
65 |
|
return 0 === strpos($maybeExpression, self::EXPRESSION_TRIGGER); |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
|
|
/** |
|
132
|
|
|
* Removes the expression trigger prefix from a string. If no prefix found, |
|
133
|
|
|
* returns the initial string. |
|
134
|
|
|
* |
|
135
|
|
|
* @param string $expression - String expression with a trigger prefix |
|
136
|
|
|
* |
|
137
|
|
|
* @return string |
|
138
|
|
|
*/ |
|
139
|
32 |
|
public static function unprefixExpression(string $expression) |
|
140
|
|
|
{ |
|
141
|
32 |
|
$string = substr($expression, strlen(self::EXPRESSION_TRIGGER)); |
|
142
|
|
|
|
|
143
|
32 |
|
return '' !== $string ? $string : $expression; |
|
144
|
|
|
} |
|
145
|
|
|
} |
|
146
|
|
|
|
overblog /
GraphQLBundle
