|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace League\JsonGuard; |
|
4
|
|
|
|
|
5
|
|
|
use League\JsonGuard\Pointer\InvalidPointerException; |
|
6
|
|
|
use League\JsonGuard\Pointer\Parser; |
|
7
|
|
|
|
|
8
|
|
|
/** |
|
9
|
|
|
* A simple JSON Pointer implementation that can traverse |
|
10
|
|
|
* an object resulting from a json_decode() call. |
|
11
|
|
|
* |
|
12
|
|
|
* @see https://tools.ietf.org/html/rfc6901 |
|
13
|
|
|
*/ |
|
14
|
|
|
class Pointer |
|
15
|
|
|
{ |
|
16
|
|
|
/** |
|
17
|
|
|
* @var object |
|
18
|
|
|
*/ |
|
19
|
|
|
private $json; |
|
20
|
|
|
|
|
21
|
|
|
/** |
|
22
|
|
|
* Pointer constructor. |
|
23
|
|
|
* @param object $json |
|
24
|
|
|
*/ |
|
25
|
40 |
|
public function __construct($json) |
|
26
|
|
|
{ |
|
27
|
40 |
|
$this->json = $json; |
|
28
|
40 |
|
} |
|
29
|
|
|
|
|
30
|
|
|
/** |
|
31
|
|
|
* @param string $pointer |
|
32
|
|
|
* @return mixed |
|
33
|
|
|
* @throws InvalidPointerException |
|
34
|
|
|
*/ |
|
35
|
34 |
|
public function get($pointer) |
|
36
|
|
|
{ |
|
37
|
34 |
|
$pointer = (new Parser($pointer))->get(); |
|
38
|
|
|
|
|
39
|
30 |
|
return $this->traverse($this->json, $pointer); |
|
40
|
|
|
} |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* @param string $pointer |
|
44
|
|
|
* @return bool |
|
45
|
|
|
*/ |
|
46
|
28 |
|
public function has($pointer) |
|
47
|
|
|
{ |
|
48
|
|
|
try { |
|
49
|
28 |
|
$this->get($pointer); |
|
50
|
|
|
|
|
51
|
28 |
|
return true; |
|
52
|
2 |
|
} catch (InvalidPointerException $e) { |
|
53
|
2 |
|
return false; |
|
54
|
|
|
} |
|
55
|
|
|
} |
|
56
|
|
|
|
|
57
|
|
|
/** |
|
58
|
|
|
* @param string $pointer |
|
59
|
|
|
* @param mixed $data |
|
60
|
|
|
* @return null |
|
61
|
|
|
* @throws InvalidPointerException |
|
62
|
|
|
* @throws \InvalidArgumentException |
|
63
|
|
|
* |
|
64
|
|
|
*/ |
|
65
|
34 |
|
public function set($pointer, $data) |
|
66
|
|
|
{ |
|
67
|
34 |
|
if ($pointer === '') { |
|
68
|
|
|
throw new \InvalidArgumentException('Cannot replace the object with set.'); |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
34 |
|
$pointer = (new Parser($pointer))->get(); |
|
72
|
|
|
|
|
73
|
|
|
// Simple way to check if the path exists. |
|
74
|
|
|
// It will throw an exception if it isn't valid. |
|
75
|
34 |
|
$this->traverse($this->json, $pointer); |
|
76
|
|
|
|
|
77
|
34 |
|
$replace = array_pop($pointer); |
|
78
|
34 |
|
$target = $this->json; |
|
79
|
34 |
|
foreach ($pointer as $segment) { |
|
80
|
32 |
|
if (is_array($target)) { |
|
81
|
8 |
|
$target =& $target[$segment]; |
|
82
|
8 |
|
} else { |
|
83
|
32 |
|
$target =& $target->$segment; |
|
84
|
|
|
} |
|
85
|
34 |
|
} |
|
86
|
|
|
|
|
87
|
34 |
|
if (is_array($target)) { |
|
88
|
10 |
|
$target[$replace] = $data; |
|
89
|
34 |
|
} elseif (is_object($target)) { |
|
90
|
30 |
|
$target->$replace = $data; |
|
91
|
30 |
|
} else { |
|
92
|
|
|
throw new \InvalidArgumentException('Cannot set data because pointer target is not an object or array.'); |
|
93
|
|
|
} |
|
94
|
|
|
|
|
95
|
34 |
|
return null; |
|
96
|
|
|
} |
|
97
|
|
|
|
|
98
|
|
|
/** |
|
99
|
|
|
* @param mixed $json The result of a json_decode call or a portion of it. |
|
100
|
|
|
* @param array $pointer The parsed pointer |
|
101
|
|
|
* @return mixed |
|
102
|
|
|
*/ |
|
103
|
36 |
|
private function traverse($json, $pointer) |
|
104
|
|
|
{ |
|
105
|
|
|
// If we are out of pointers to process we are done. |
|
106
|
36 |
|
if (empty($pointer)) { |
|
107
|
36 |
|
return $json; |
|
108
|
|
|
} |
|
109
|
|
|
|
|
110
|
36 |
|
$reference = array_shift($pointer); |
|
111
|
|
|
|
|
112
|
|
|
// who does this? |
|
113
|
36 |
|
if ($reference === '' && property_exists($json, '_empty_')) { |
|
114
|
2 |
|
return $this->traverse($json->_empty_, $pointer); |
|
115
|
|
|
} |
|
116
|
|
|
|
|
117
|
36 |
|
if (is_object($json)) { |
|
118
|
36 |
|
if (!property_exists($json, $reference)) { |
|
119
|
2 |
|
throw InvalidPointerException::nonexistentValue($reference); |
|
120
|
|
|
} |
|
121
|
|
|
|
|
122
|
36 |
|
return $this->traverse($json->$reference, $pointer); |
|
123
|
14 |
|
} elseif (is_array($json)) { |
|
124
|
14 |
|
if ($reference === '-') { |
|
125
|
|
|
// I guess we are done. |
|
126
|
|
|
return end($json); |
|
127
|
|
|
} |
|
128
|
14 |
|
if (!array_key_exists($reference, $json)) { |
|
129
|
|
|
throw InvalidPointerException::nonexistentValue($reference); |
|
130
|
|
|
} |
|
131
|
|
|
|
|
132
|
14 |
|
return $this->traverse($json[$reference], $pointer); |
|
133
|
|
|
} else { |
|
134
|
|
|
throw InvalidPointerException::nonexistentValue($reference); |
|
135
|
|
|
} |
|
136
|
|
|
} |
|
137
|
|
|
} |
|
138
|
|
|
|
thephpleague /
json-guard
