Completed
Pull Request — master (#49)
by Daniel
08:41
created

Registry::has()   A

Complexity

Conditions 2
Paths 2

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 4
rs 10
c 0
b 0
f 0
cc 2
eloc 2
nc 2
nop 1
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<?php
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namespace Psi\Component\Grid;
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class Registry
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{
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    private $context;
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    private $class;
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    private $instances = [];
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    private $aliases = [];
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    public function __construct(string $class, string $context)
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    {
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        $this->class = $class;
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        $this->context = $context;
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    }
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    public function register($instance, $alias = null)
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    {
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        if (!is_object($instance)) {
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            throw new \InvalidArgumentException(sprintf(
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                'Expected an object, but got an "%s".',
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                gettype($instance)
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            ));
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        }
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        if (false === $instance instanceof $this->class) {
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            throw new \InvalidArgumentException(sprintf(
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                'Expected an instance of "%s", but got "%s"',
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                $this->class, get_class($instance)
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            ));
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        }
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        $classFqn = get_class($instance);
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        if (isset($this->instances[$classFqn])) {
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            throw new \InvalidArgumentException(sprintf(
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                '%s "%s" has already been registered',
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                $this->context, $classFqn
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            ));
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        }
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        $this->instances[$classFqn] = $instance;
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        if (null !== $alias) {
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            if (isset($this->aliases[$alias])) {
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                throw new \InvalidArgumentException(sprintf(
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                    'Alias "%s" has already been set to "%s"',
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                    $alias, $this->aliases[$alias]
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                ));
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            }
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            $this->aliases[$alias] = $classFqn;
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        }
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    }
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    public function get(string $classFqn)
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    {
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        if (isset($this->aliases[$classFqn])) {
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            $classFqn = $this->aliases[$classFqn];
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        }
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        if (!isset($this->instances[$classFqn])) {
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            throw new \InvalidArgumentException(sprintf(
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                '%s with name "%s" was not found. Known %s types: "%s", aliases: "%s"',
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                $this->context, 
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                $classFqn, 
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                $this->context, 
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                implode('", "', array_keys($this->instances)),
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                implode('", "', array_keys($this->aliases))
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            ));
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        }
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        return $this->instances[$classFqn];
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    }
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    public function has(string $classFqn)
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    {
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        return isset($this->instances[$classFqn]) || isset($this->aliases[$classFqn]);
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    }
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}
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