|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace SRIO\ChainOfResponsibility; |
|
4
|
|
|
|
|
5
|
|
|
use PlasmaConduit\DependencyGraph; |
|
6
|
|
|
use PlasmaConduit\dependencygraph\DependencyGraphNode; |
|
7
|
|
|
use PlasmaConduit\either\Left; |
|
8
|
|
|
use SRIO\ChainOfResponsibility\Exception\CircularDependencyException; |
|
9
|
|
|
use SRIO\ChainOfResponsibility\Exception\UnresolvedDependencyException; |
|
10
|
|
|
|
|
11
|
|
|
final class ChainBuilder extends ProcessCollection |
|
12
|
|
|
{ |
|
13
|
|
|
/** |
|
14
|
|
|
* Name of the root node in dependency graph. |
|
15
|
|
|
* |
|
16
|
|
|
* @var string |
|
17
|
|
|
*/ |
|
18
|
|
|
const ROOT_NODE_NAME = '_root'; |
|
19
|
|
|
|
|
20
|
|
|
/** |
|
21
|
|
|
* @param array $processes |
|
22
|
|
|
*/ |
|
23
|
5 |
|
public function __construct(array $processes) |
|
24
|
|
|
{ |
|
25
|
5 |
|
$this->add($processes); |
|
26
|
5 |
|
} |
|
27
|
|
|
|
|
28
|
|
|
/** |
|
29
|
|
|
* Get runner for given processes. |
|
30
|
|
|
* |
|
31
|
|
|
* @return ChainRunner |
|
32
|
|
|
* |
|
33
|
|
|
* @throws UnresolvedDependencyException |
|
34
|
|
|
*/ |
|
35
|
5 |
|
public function getRunner() |
|
36
|
|
|
{ |
|
37
|
5 |
|
return new ChainRunner($this->getOrderedProcesses()); |
|
38
|
|
|
} |
|
39
|
|
|
|
|
40
|
|
|
/** |
|
41
|
|
|
* Get processes ordered based on their dependencies. |
|
42
|
|
|
* |
|
43
|
|
|
* @return array |
|
44
|
|
|
* |
|
45
|
|
|
* @throws CircularDependencyException |
|
46
|
|
|
* @throws UnresolvedDependencyException |
|
47
|
|
|
*/ |
|
48
|
5 |
|
public function getOrderedProcesses() |
|
49
|
|
|
{ |
|
50
|
5 |
|
$graph = new DependencyGraph(); |
|
51
|
5 |
|
$root = new DependencyGraphNode(self::ROOT_NODE_NAME); |
|
52
|
5 |
|
$graph->addRoot($root); |
|
53
|
|
|
|
|
54
|
5 |
|
$processes = $this->getProcesses(); |
|
55
|
5 |
|
$nodes = []; |
|
56
|
5 |
|
foreach ($processes as $process) { |
|
57
|
5 |
|
$processName = $this->getProcessName($process); |
|
58
|
5 |
|
$node = new DependencyGraphNode($processName); |
|
59
|
5 |
|
$graph->addDependency($root, $node); |
|
60
|
5 |
|
$nodes[$processName] = [$process, $node]; |
|
61
|
5 |
|
} |
|
62
|
|
|
|
|
63
|
5 |
|
foreach ($nodes as $processName => $nodeDescription) { |
|
64
|
5 |
|
list($process, $node) = $nodeDescription; |
|
65
|
5 |
|
if (!$process instanceof DependentChainProcessInterface) { |
|
66
|
1 |
|
$graph->addDependency($root, $node); |
|
67
|
1 |
|
continue; |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
4 |
|
foreach ($process->dependsOn() as $dependencyName) { |
|
71
|
4 |
|
if (!array_key_exists($dependencyName, $nodes)) { |
|
72
|
1 |
|
throw new UnresolvedDependencyException(sprintf( |
|
73
|
1 |
|
'Process "%s" is dependent of "%s" which is not found', |
|
74
|
1 |
|
$processName, |
|
75
|
|
|
$dependencyName |
|
76
|
1 |
|
)); |
|
77
|
|
|
} |
|
78
|
|
|
|
|
79
|
3 |
|
if ($graph->addDependency($node, $nodes[$dependencyName][1]) instanceof Left) { |
|
80
|
1 |
|
throw new CircularDependencyException(sprintf( |
|
81
|
1 |
|
'Circular dependency found: %s already depends on %s', |
|
82
|
1 |
|
$dependencyName, $processName |
|
83
|
1 |
|
)); |
|
84
|
|
|
} |
|
85
|
3 |
|
} |
|
86
|
4 |
|
} |
|
87
|
|
|
|
|
88
|
|
|
return array_map(function ($nodeName) use ($nodes) { |
|
89
|
3 |
|
return $nodes[$nodeName][0]; |
|
90
|
3 |
|
}, array_filter($graph->flatten(), function ($nodeName) { |
|
91
|
3 |
|
return $nodeName !== self::ROOT_NODE_NAME; |
|
92
|
3 |
|
})); |
|
93
|
|
|
} |
|
94
|
|
|
|
|
95
|
|
|
/** |
|
96
|
|
|
* @param ChainProcessInterface $process |
|
97
|
|
|
* |
|
98
|
|
|
* @return string |
|
99
|
|
|
*/ |
|
100
|
5 |
|
private function getProcessName(ChainProcessInterface $process) |
|
101
|
|
|
{ |
|
102
|
5 |
|
return $process instanceof NamedChainProcessInterface ? $process->getName() : spl_object_hash($process); |
|
103
|
|
|
} |
|
104
|
|
|
} |
|
105
|
|
|
|
sroze /
ChainOfResponsibility
