|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Overblog\GraphQLBundle\Relay\Connection; |
|
6
|
|
|
|
|
7
|
|
|
use Overblog\GraphQLBundle\Definition\Argument; |
|
8
|
|
|
|
|
9
|
|
|
class Paginator |
|
10
|
|
|
{ |
|
11
|
|
|
public const MODE_REGULAR = false; |
|
12
|
|
|
public const MODE_PROMISE = true; |
|
13
|
|
|
|
|
14
|
|
|
/** @var callable */ |
|
15
|
|
|
private $fetcher; |
|
16
|
|
|
|
|
17
|
|
|
/** @var bool */ |
|
18
|
|
|
private $promise; |
|
19
|
|
|
|
|
20
|
|
|
/** @var int */ |
|
21
|
|
|
private $totalCount; |
|
22
|
|
|
|
|
23
|
|
|
/** @var ConnectionBuilder */ |
|
24
|
|
|
private $connectionBuilder; |
|
25
|
|
|
|
|
26
|
|
|
/** |
|
27
|
|
|
* @param callable $fetcher |
|
28
|
|
|
* @param bool $promise |
|
29
|
|
|
*/ |
|
30
|
14 |
|
public function __construct(callable $fetcher, bool $promise = self::MODE_REGULAR, ConnectionBuilder $connectionBuilder = null) |
|
31
|
|
|
{ |
|
32
|
14 |
|
$this->fetcher = $fetcher; |
|
33
|
14 |
|
$this->promise = $promise; |
|
34
|
14 |
|
$this->connectionBuilder = $connectionBuilder ?: new ConnectionBuilder(); |
|
35
|
14 |
|
} |
|
36
|
|
|
|
|
37
|
|
|
/** |
|
38
|
|
|
* @param Argument $args |
|
39
|
|
|
* @param int|callable $total |
|
40
|
|
|
* @param array $callableArgs |
|
41
|
|
|
* |
|
42
|
|
|
* @return ConnectionInterface|object A connection or a promise |
|
43
|
|
|
*/ |
|
44
|
7 |
|
public function backward($args, $total, array $callableArgs = []) |
|
45
|
|
|
{ |
|
46
|
7 |
|
$total = $this->computeTotalCount($total, $callableArgs); |
|
47
|
|
|
|
|
48
|
7 |
|
$args = $this->protectArgs($args); |
|
49
|
7 |
|
$limit = $args['last']; |
|
50
|
7 |
|
$offset = \max(0, $this->connectionBuilder->getOffsetWithDefault($args['before'], $total) - $limit); |
|
51
|
|
|
|
|
52
|
7 |
|
$entities = \call_user_func($this->fetcher, $offset, $limit); |
|
53
|
|
|
|
|
54
|
|
|
return $this->handleEntities($entities, function ($entities) use ($args, $offset, $total) { |
|
55
|
7 |
|
return $this->connectionBuilder->connectionFromArraySlice($entities, $args, [ |
|
56
|
7 |
|
'sliceStart' => $offset, |
|
57
|
7 |
|
'arrayLength' => $total, |
|
58
|
|
|
]); |
|
59
|
7 |
|
}); |
|
60
|
|
|
} |
|
61
|
|
|
|
|
62
|
|
|
/** |
|
63
|
|
|
* @param Argument $args |
|
64
|
|
|
* |
|
65
|
|
|
* @return ConnectionInterface|object A connection or a promise |
|
66
|
|
|
*/ |
|
67
|
7 |
|
public function forward(Argument $args) |
|
68
|
|
|
{ |
|
69
|
7 |
|
$args = $this->protectArgs($args); |
|
70
|
7 |
|
$limit = $args['first']; |
|
71
|
7 |
|
$offset = $this->connectionBuilder->getOffsetWithDefault($args['after'], 0); |
|
72
|
|
|
|
|
73
|
|
|
// If we don't have a cursor or if it's not valid, then we must not use the slice method |
|
74
|
7 |
|
if (!\is_numeric($this->connectionBuilder->cursorToOffset($args['after'])) || !$args['after']) { |
|
75
|
4 |
|
$entities = \call_user_func($this->fetcher, $offset, $limit ? $limit + 1 : $limit); |
|
76
|
|
|
|
|
77
|
|
|
return $this->handleEntities($entities, function ($entities) use ($args) { |
|
78
|
3 |
|
return $this->connectionBuilder->connectionFromArray($entities, $args); |
|
79
|
4 |
|
}); |
|
80
|
|
|
} else { |
|
81
|
3 |
|
$entities = \call_user_func($this->fetcher, $offset, $limit ? $limit + 2 : $limit); |
|
82
|
|
|
|
|
83
|
|
|
return $this->handleEntities($entities, function ($entities) use ($args, $offset) { |
|
84
|
3 |
|
return $this->connectionBuilder->connectionFromArraySlice($entities, $args, [ |
|
85
|
3 |
|
'sliceStart' => $offset, |
|
86
|
3 |
|
'arrayLength' => $offset + \count($entities), |
|
87
|
|
|
]); |
|
88
|
3 |
|
}); |
|
89
|
|
|
} |
|
90
|
|
|
} |
|
91
|
|
|
|
|
92
|
|
|
/** |
|
93
|
|
|
* @param Argument $args |
|
94
|
|
|
* @param int|callable $total |
|
95
|
|
|
* @param array $callableArgs |
|
96
|
|
|
* |
|
97
|
|
|
* @return ConnectionInterface|object A connection or a promise |
|
98
|
|
|
*/ |
|
99
|
5 |
|
public function auto(Argument $args, $total, array $callableArgs = []) |
|
100
|
|
|
{ |
|
101
|
5 |
|
$args = $this->protectArgs($args); |
|
102
|
|
|
|
|
103
|
5 |
|
if ($args['last']) { |
|
104
|
3 |
|
$connection = $this->backward($args, $total, $callableArgs); |
|
105
|
|
|
} else { |
|
106
|
2 |
|
$connection = $this->forward($args); |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
5 |
|
if ($this->promise) { |
|
110
|
|
|
return $connection->then(function (ConnectionInterface $connection) use ($total, $callableArgs) { |
|
111
|
|
|
$connection->setTotalCount($this->computeTotalCount($total, $callableArgs)); |
|
112
|
|
|
|
|
113
|
|
|
return $connection; |
|
114
|
1 |
|
}); |
|
115
|
|
|
} else { |
|
116
|
4 |
|
$connection->setTotalCount($this->computeTotalCount($total, $callableArgs)); |
|
117
|
|
|
|
|
118
|
4 |
|
return $connection; |
|
119
|
|
|
} |
|
120
|
|
|
} |
|
121
|
|
|
|
|
122
|
|
|
/** |
|
123
|
|
|
* @param array|object $entities An array of entities to paginate or a promise |
|
124
|
|
|
* @param callable $callback |
|
125
|
|
|
* |
|
126
|
|
|
* @return ConnectionInterface|object A connection or a promise |
|
127
|
|
|
*/ |
|
128
|
14 |
|
private function handleEntities($entities, callable $callback) |
|
129
|
|
|
{ |
|
130
|
14 |
|
if ($this->promise) { |
|
131
|
1 |
|
return $entities->then($callback); |
|
132
|
|
|
} |
|
133
|
|
|
|
|
134
|
13 |
|
return \call_user_func($callback, $entities); |
|
135
|
|
|
} |
|
136
|
|
|
|
|
137
|
|
|
/** |
|
138
|
|
|
* @param Argument|array $args |
|
139
|
|
|
* |
|
140
|
|
|
* @return Argument |
|
141
|
|
|
*/ |
|
142
|
14 |
|
private function protectArgs($args): Argument |
|
143
|
|
|
{ |
|
144
|
14 |
|
return $args instanceof Argument ? $args : new Argument($args); |
|
145
|
|
|
} |
|
146
|
|
|
|
|
147
|
|
|
/** |
|
148
|
|
|
* @param int|callable $total |
|
149
|
|
|
* @param array $callableArgs |
|
150
|
|
|
* |
|
151
|
|
|
* @return int|mixed |
|
152
|
|
|
*/ |
|
153
|
8 |
|
private function computeTotalCount($total, array $callableArgs = []) |
|
154
|
|
|
{ |
|
155
|
8 |
|
if (null !== $this->totalCount) { |
|
156
|
3 |
|
return $this->totalCount; |
|
157
|
|
|
} |
|
158
|
|
|
|
|
159
|
8 |
|
$this->totalCount = \is_callable($total) ? \call_user_func_array($total, $callableArgs) : $total; |
|
160
|
|
|
|
|
161
|
8 |
|
return $this->totalCount; |
|
162
|
|
|
} |
|
163
|
|
|
} |
|
164
|
|
|
|
overblog /
GraphQLBundle
