1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
namespace Wikibase\DataModel\Services\Lookup; |
4
|
|
|
|
5
|
|
|
use InvalidArgumentException; |
6
|
|
|
use Wikibase\DataModel\Entity\EntityDocument; |
7
|
|
|
use Wikibase\DataModel\Entity\EntityId; |
8
|
|
|
|
9
|
|
|
/** |
10
|
|
|
* EntityLookup that counts how many entities have been loaded through it and throws |
11
|
|
|
* an exception once to many entities have been loaded. |
12
|
|
|
* |
13
|
|
|
* This is needed to limit the number of entities that can be loaded via some |
14
|
|
|
* user controlled features, like entity access in Lua. |
15
|
|
|
* |
16
|
|
|
* @since 2.0 |
17
|
|
|
* |
18
|
|
|
* @license GPL-2.0-or-later |
19
|
|
|
* @author Marius Hoch < [email protected] > |
20
|
|
|
*/ |
21
|
|
|
class RestrictedEntityLookup implements EntityLookup { |
22
|
|
|
|
23
|
|
|
/** |
24
|
|
|
* @var EntityLookup |
25
|
|
|
*/ |
26
|
|
|
private $entityLookup; |
27
|
|
|
|
28
|
|
|
/** |
29
|
|
|
* @var int |
30
|
|
|
*/ |
31
|
|
|
private $entityAccessLimit; |
32
|
|
|
|
33
|
|
|
/** |
34
|
|
|
* @var bool[] Entity id serialization => bool |
35
|
|
|
*/ |
36
|
|
|
private $entitiesAccessed = []; |
37
|
|
|
|
38
|
|
|
/** |
39
|
|
|
* @var int |
40
|
|
|
*/ |
41
|
|
|
private $entityAccessCount = 0; |
42
|
|
|
|
43
|
|
|
/** |
44
|
|
|
* @param EntityLookup $entityLookup |
45
|
|
|
* @param int $entityAccessLimit |
46
|
|
|
* |
47
|
|
|
* @throws InvalidArgumentException |
48
|
|
|
*/ |
49
|
7 |
|
public function __construct( EntityLookup $entityLookup, $entityAccessLimit ) { |
50
|
7 |
|
if ( !is_int( $entityAccessLimit ) || $entityAccessLimit < 1 ) { |
51
|
1 |
|
throw new InvalidArgumentException( '$entityAccessLimit must be a positive integer' ); |
52
|
|
|
} |
53
|
|
|
|
54
|
6 |
|
$this->entityLookup = $entityLookup; |
55
|
6 |
|
$this->entityAccessLimit = $entityAccessLimit; |
56
|
6 |
|
} |
57
|
|
|
|
58
|
|
|
/** |
59
|
|
|
* @see EntityLookup::getEntity |
60
|
|
|
* |
61
|
|
|
* @param EntityId $entityId |
62
|
|
|
* |
63
|
|
|
* @throws EntityAccessLimitException |
64
|
|
|
* @return EntityDocument |
65
|
|
|
*/ |
66
|
4 |
|
public function getEntity( EntityId $entityId ) { |
67
|
4 |
|
$entityIdSerialization = $entityId->getSerialization(); |
68
|
|
|
|
69
|
4 |
|
if ( !array_key_exists( $entityIdSerialization, $this->entitiesAccessed ) ) { |
70
|
4 |
|
$this->entityAccessCount++; |
71
|
4 |
|
$this->entitiesAccessed[$entityIdSerialization] = true; |
72
|
4 |
|
} |
73
|
|
|
|
74
|
4 |
|
if ( $this->entityAccessCount > $this->entityAccessLimit ) { |
75
|
1 |
|
throw new EntityAccessLimitException( |
76
|
1 |
|
$entityId, |
77
|
1 |
|
'To many entities loaded, must not load more than ' . $this->entityAccessLimit . ' entities.' |
78
|
1 |
|
); |
79
|
|
|
} |
80
|
|
|
|
81
|
4 |
|
return $this->entityLookup->getEntity( $entityId ); |
82
|
|
|
} |
83
|
|
|
|
84
|
|
|
/** |
85
|
|
|
* @see EntityLookup::hasEntity |
86
|
|
|
* |
87
|
|
|
* @param EntityId $entityId |
88
|
|
|
* |
89
|
|
|
* @return bool |
90
|
|
|
* @throws EntityLookupException |
91
|
|
|
*/ |
92
|
1 |
|
public function hasEntity( EntityId $entityId ) { |
93
|
1 |
|
return $this->entityLookup->hasEntity( $entityId ); |
94
|
|
|
} |
95
|
|
|
|
96
|
|
|
/** |
97
|
|
|
* Returns the number of entities already loaded via this object. |
98
|
|
|
* |
99
|
|
|
* @since 2.0 |
100
|
|
|
* |
101
|
|
|
* @return int |
102
|
|
|
*/ |
103
|
1 |
|
public function getEntityAccessCount() { |
104
|
1 |
|
return $this->entityAccessCount; |
105
|
|
|
} |
106
|
|
|
|
107
|
|
|
/** |
108
|
|
|
* Resets the number and list of entities loaded via this object. |
109
|
|
|
* |
110
|
|
|
* @since 3.4 |
111
|
|
|
*/ |
112
|
|
|
public function reset() { |
113
|
|
|
$this->entityAccessCount = 0; |
114
|
|
|
$this->entitiesAccessed = []; |
115
|
|
|
} |
116
|
1 |
|
|
117
|
1 |
|
/** |
118
|
|
|
* Whether an entity has been accessed before via this RestrictedEntityLookup. |
119
|
1 |
|
* |
120
|
|
|
* @since 2.0 |
121
|
|
|
* |
122
|
|
|
* @param EntityId $entityId |
123
|
|
|
* |
124
|
|
|
* @return bool |
125
|
|
|
*/ |
126
|
|
|
public function entityHasBeenAccessed( EntityId $entityId ) { |
127
|
|
|
$entityIdSerialization = $entityId->getSerialization(); |
128
|
|
|
|
129
|
|
|
return array_key_exists( $entityIdSerialization, $this->entitiesAccessed ); |
130
|
|
|
} |
131
|
|
|
|
132
|
|
|
} |
133
|
|
|
|