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<?php |
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declare(strict_types = 1); |
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namespace Innmind\Compose; |
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use Innmind\Compose\{ |
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Arguments as Args, |
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Definition\Argument as Arg, |
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Definition\Name, |
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Definition\Service, |
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Definition\Service\Constructor, |
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Definition\Service\Argument, |
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Definition\Service\Argument\HoldReference, |
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Visualization\Graph\Dependency, |
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Visualization\Graph\Arguments, |
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Visualization\Node\Element |
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}; |
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use Innmind\Graphviz\{ |
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Graph, |
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Node\Node |
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}; |
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use Innmind\Immutable\{ |
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MapInterface, |
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Set, |
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Str, |
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Map |
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}; |
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final class Visualize |
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{ |
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public function __invoke(Services $services): Graph |
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{ |
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$graph = $this |
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->loadClusters($services->dependencies()) |
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->reduce( |
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Graph\Graph::directed(), |
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static function(Graph $graph, Graph $cluster): Graph { |
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return $graph->cluster($cluster); |
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} |
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) |
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->cluster(new Arguments($services->arguments())); |
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$nodes = $this->buildNodes($services); |
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$this->linkNodes($nodes); |
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$graph = $nodes->reduce( |
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$graph, |
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static function(Graph $graph, string $name, array $pair): Graph { |
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return $graph->add($pair[0]); |
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} |
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); |
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return $this->linkDefaults($graph, $services->arguments(), $nodes); |
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} |
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private function loadClusters(Dependencies $dependencies): Set |
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{ |
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return $dependencies->exposed()->reduce( |
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Set::of(Graph::class), |
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static function(Set $clusters, Name $dependency, MapInterface $services): Set { |
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return $clusters->add(new Dependency($dependency, $services)); |
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} |
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); |
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} |
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private function buildNodes(Services $services): Map |
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{ |
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return $services |
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->all() |
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->filter(static function(Service $service): bool { |
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return !$service->decorates(); |
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}) |
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->reduce( |
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new Map('string', 'array'), |
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static function(Map $nodes, Service $service): Map { |
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$node = Element::service($service); |
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return $nodes->put( |
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(string) $node->name(), |
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[$node, $service] |
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); |
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} |
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); |
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} |
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private function linkNodes(Map $nodes): void |
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{ |
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$nodes |
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->values() |
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->filter(static function(array $pair): bool { |
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//do not try to link nodes for services that do not depend on |
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//other services |
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return $pair[1] |
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->arguments() |
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->filter(static function(Argument $argument): bool { |
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return $argument instanceof HoldReference; |
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}) |
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->size() > 0; |
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}) |
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->foreach(static function(array $pair) use ($nodes): void { |
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$pair[1] |
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->arguments() |
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->filter(static function(Argument $argument): bool { |
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return $argument instanceof HoldReference; |
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}) |
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->foreach(static function(HoldReference $argument) use ($pair, $nodes): void { |
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$name = (string) Element::build($argument->reference())->name(); |
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//an argument or a dependency |
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if (!$nodes->contains($name)) { |
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$pair[0]->linkedTo(Node::named($name)); |
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return; |
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} |
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$pair[0]->linkedTo( |
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$nodes->get($name)[0] |
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); |
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}); |
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}); |
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} |
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private function linkDefaults(Graph $graph, Args $arguments, Map $nodes): Graph |
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{ |
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return $arguments |
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->all() |
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->filter(static function(Arg $argument): bool { |
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return $argument->hasDefault(); |
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}) |
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->reduce( |
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$graph, |
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static function(Graph $graph, Arg $argument) use ($nodes): Graph { |
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$node = Element::build($argument->name()); |
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$default = Element::build($argument->default()); |
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$default = $nodes->get((string) $default->name())[0]; |
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$edge = $node->linkedTo($default); |
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$edge |
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->dotted() |
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->displayAs('defaults to'); |
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return $graph->add($node); |
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} |
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); |
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} |
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} |
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Innmind /
Compose
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: