|
1
|
|
|
<?php declare(strict_types=1); |
|
2
|
|
|
|
|
3
|
|
|
namespace DaveRandom\Jom; |
|
4
|
|
|
|
|
5
|
|
|
use DaveRandom\Jom\Exceptions\InvalidPointerException; |
|
6
|
|
|
|
|
7
|
|
|
final class Pointer |
|
8
|
|
|
{ |
|
9
|
|
|
private $path = []; |
|
10
|
|
|
private $relativeLevels = null; |
|
11
|
|
|
private $keyLookup = false; |
|
12
|
|
|
|
|
13
|
|
|
private $string; |
|
14
|
|
|
|
|
15
|
20 |
|
/** |
|
16
|
|
|
* @throws InvalidPointerException |
|
17
|
20 |
|
*/ |
|
18
|
|
|
private static function decodePath(string $path): array |
|
19
|
20 |
|
{ |
|
20
|
20 |
|
if ($path !== '' && $path[0] !== '/') { |
|
21
|
|
|
throw new InvalidPointerException('JSON pointer path must be the empty string or begin with /'); |
|
22
|
|
|
} |
|
23
|
20 |
|
|
|
24
|
|
|
$result = []; |
|
25
|
|
|
|
|
26
|
22 |
|
foreach (\explode('/', \substr($path, 1)) as $component) { |
|
27
|
|
|
$result[] = \str_replace(['~1', '~0'], ['/', '~'], $component); |
|
28
|
22 |
|
} |
|
29
|
|
|
|
|
30
|
22 |
|
return $result; |
|
31
|
14 |
|
} |
|
32
|
|
|
|
|
33
|
|
|
private static function encodePath(array $path): string |
|
34
|
22 |
|
{ |
|
35
|
|
|
$result = ''; |
|
36
|
|
|
|
|
37
|
|
|
foreach ($path as $component) { |
|
38
|
|
|
$result .= '/' . \str_replace(['~', '/'], ['~0', '~1'], $component); |
|
39
|
49 |
|
} |
|
40
|
|
|
|
|
41
|
49 |
|
return $result; |
|
42
|
42 |
|
} |
|
43
|
49 |
|
|
|
44
|
|
|
private static function splitRelativePointerComponents(string $pointer): array |
|
45
|
|
|
{ |
|
46
|
|
|
return \preg_match('/^(0|[1-9][0-9]*)($|[^0-9].*)/i', $pointer, $match) |
|
47
|
|
|
? [$match[2], (int)$match[1]] |
|
48
|
|
|
: [$pointer, null]; |
|
49
|
49 |
|
} |
|
50
|
|
|
|
|
51
|
49 |
|
/** |
|
52
|
|
|
* @throws InvalidPointerException |
|
53
|
49 |
|
*/ |
|
54
|
|
|
private static function validateRelativePointerParams(?int $relativeLevels, ?bool $isKeyLookup): void |
|
55
|
49 |
|
{ |
|
56
|
|
|
if ($relativeLevels < 0) { |
|
57
|
49 |
|
throw new InvalidPointerException('Relative levels must be positive'); |
|
58
|
29 |
|
} |
|
59
|
|
|
|
|
60
|
|
|
if ($isKeyLookup && $relativeLevels === null) { |
|
61
|
20 |
|
throw new InvalidPointerException('Key lookups are only valid for relative pointers'); |
|
62
|
|
|
} |
|
63
|
|
|
} |
|
64
|
|
|
|
|
65
|
20 |
|
private function __construct() { } |
|
66
|
|
|
|
|
67
|
20 |
|
/** |
|
68
|
|
|
* @throws InvalidPointerException |
|
69
|
|
|
*/ |
|
70
|
|
|
public static function createFromString(string $pointer): self |
|
71
|
|
|
{ |
|
72
|
|
|
$result = new self(); |
|
73
|
|
|
|
|
74
|
11 |
|
[$path, $result->relativeLevels] = self::splitRelativePointerComponents($pointer); |
|
75
|
|
|
|
|
76
|
11 |
|
$result->keyLookup = $result->relativeLevels !== null && $path === '#'; |
|
77
|
|
|
|
|
78
|
|
|
if (!$result->keyLookup) { |
|
79
|
|
|
$result->path = self::decodePath($path); |
|
80
|
11 |
|
} |
|
81
|
|
|
|
|
82
|
|
|
return $result; |
|
83
|
|
|
} |
|
84
|
11 |
|
|
|
85
|
|
|
/** |
|
86
|
11 |
|
* @param string[] $path |
|
87
|
7 |
|
* @throws InvalidPointerException |
|
88
|
|
|
*/ |
|
89
|
|
|
public static function createFromParameters(array $path, ?int $relativeLevels = null, ?bool $isKeyLookup = false): self |
|
90
|
11 |
|
{ |
|
91
|
11 |
|
self::validateRelativePointerParams($relativeLevels, $isKeyLookup); |
|
92
|
|
|
|
|
93
|
11 |
|
$result = new self(); |
|
94
|
|
|
|
|
95
|
|
|
$result->relativeLevels = $relativeLevels; |
|
96
|
37 |
|
$result->keyLookup = $isKeyLookup ?? false; |
|
97
|
|
|
|
|
98
|
37 |
|
foreach ($path as $component) { |
|
99
|
|
|
$result->path[] = (string)$component; |
|
100
|
|
|
} |
|
101
|
42 |
|
|
|
102
|
|
|
return $result; |
|
103
|
42 |
|
} |
|
104
|
|
|
|
|
105
|
|
|
public function getPath(): array |
|
106
|
49 |
|
{ |
|
107
|
|
|
return $this->path; |
|
108
|
49 |
|
} |
|
109
|
|
|
|
|
110
|
|
|
public function getRelativeLevels(): ?int |
|
111
|
30 |
|
{ |
|
112
|
|
|
return $this->relativeLevels; |
|
113
|
30 |
|
} |
|
114
|
|
|
|
|
115
|
|
|
public function isRelative(): bool |
|
116
|
26 |
|
{ |
|
117
|
|
|
return $this->relativeLevels !== null; |
|
118
|
26 |
|
} |
|
119
|
|
|
|
|
120
|
|
|
public function isKeyLookup(): bool |
|
121
|
|
|
{ |
|
122
|
26 |
|
return $this->keyLookup; |
|
123
|
|
|
} |
|
124
|
26 |
|
|
|
125
|
19 |
|
public function __toString(): string |
|
126
|
|
|
{ |
|
127
|
|
|
if (isset($this->string)) { |
|
128
|
26 |
|
return $this->string; |
|
129
|
4 |
|
} |
|
130
|
22 |
|
|
|
131
|
|
|
$this->string = ''; |
|
132
|
26 |
|
|
|
133
|
|
|
if ($this->relativeLevels !== null) { |
|
134
|
|
|
$this->string .= $this->relativeLevels; |
|
135
|
|
|
} |
|
136
|
|
|
|
|
137
|
|
|
$this->string .= $this->keyLookup |
|
138
|
|
|
? '#' |
|
139
|
|
|
: self::encodePath($this->path); |
|
140
|
|
|
|
|
141
|
|
|
return $this->string; |
|
142
|
|
|
} |
|
143
|
|
|
} |
|
144
|
|
|
|
DaveRandom /
JOM
