View::getArgs() - Code Metrics - Inspection of "Render errors according to Accept header" - coniadev/chuck - Measure and Improve Code Quality continuously with Scrutinizer

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by Thomas

created 2023-01-16 19:07 UTC

View::getArgs() B

↳ Parent: View

Complexity

Conditions	8
Paths	5

Size

Total Lines	38
Code Lines	24

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	25
CRAP Score	8

Importance

Changes

Metric	Value
eloc	24
dl	0
loc	38
ccs	25
cts	25
cp	1
rs	8.4444
c	0
b	0
f	0
cc	8
nc	5
nop	1
crap	8

<?php

declare(strict_types=1);

namespace Conia\Chuck\Http;

use Closure;
use Conia\Chuck\Di\Resolver;
use Conia\Chuck\Exception\ContainerException;
use Conia\Chuck\Exception\RuntimeException;
use Conia\Chuck\Psr\Factory;
use Conia\Chuck\Registry;
use Conia\Chuck\Renderer\Config as RendererConfig;
use Conia\Chuck\Renderer\Render;
use Conia\Chuck\Renderer\Renderer;
use Conia\Chuck\Response;
use Conia\Chuck\Route;
use Psr\Http\Message\ResponseInterface as PsrResponse;
use ReflectionAttribute;
use ReflectionClass;
use ReflectionFunction;
use ReflectionFunctionAbstract;
use ReflectionMethod;
use ReflectionObject;
use Throwable;

class View
{
    protected ?array $attributes = null;
    protected Closure $closure;

    public function __construct(
        callable|string|array $view,
        protected readonly array $routeArgs,
        protected readonly Registry $registry
    ) {
        if (is_callable($view)) {
            /** @var callable $view -- Psalm complains even though we use is_callable() */
            $this->closure = Closure::fromCallable($view);
        } else {
            $this->closure = $this->getClosure($view);
        }
    }

    public function execute(): mixed
    {
        return ($this->closure)(...$this->getArgs(
            self::getReflectionFunction($this->closure)
        ));
    }

    public function respond(
        Route $route,
        Registry $registry,
    ): Response {
        /**
         * @psalm-suppress MixedAssignment
         *
         * Later in the function we check the type of $result.
         */
        $result = $this->execute();

        if ($result instanceof Response) {
            return $result;
        }

        if ($result instanceof PsrResponse) {
            $factory = $registry->get(Factory::class);
            assert($factory instanceof Factory);

            return new Response($result, $factory);
        }

        $renderAttributes = $this->attributes(Render::class);

        if (count($renderAttributes) > 0) {
            assert($renderAttributes[0] instanceof Render);

            return $renderAttributes[0]->response($registry, $result);
        }

        $rendererConfig = $route->getRenderer();

        if ($rendererConfig) {
            return $this->respondFromRenderer($registry, $rendererConfig, $result);
        }

        throw new RuntimeException('Unable to determine a response handler for the returned value of the view');
    }

    public static function getReflectionFunction(
        callable $callable
    ): ReflectionFunction|ReflectionMethod {
        if ($callable instanceof Closure) {
            return new ReflectionFunction($callable);
        }
        if (is_object($callable)) {
            return (new ReflectionObject($callable))->getMethod('__invoke');
        }
        /** @var Closure|non-falsy-string $callable */
        return new ReflectionFunction($callable);
    }

    /** @psalm-param $filter ?class-string */
    public function attributes(string $filter = null): array
    {
        $reflector = new ReflectionFunction($this->closure);

        if (!isset($this->attributes)) {
            $this->attributes = array_map(function ($attribute) {
                return $this->newAttributeInstance($attribute);
            }, $reflector->getAttributes());
        }

        if ($filter) {
            return array_values(
                array_filter($this->attributes, function ($attribute) use ($filter) {
                    return $attribute instanceof $filter;
                })
            );
        }

        return $this->attributes;
    }

    protected function newAttributeInstance(ReflectionAttribute $attribute): object
    {
        return (new Resolver($this->registry))
            ->resolveCallAttributes($attribute->newInstance());
    }

    protected function respondFromRenderer(
        Registry $registry,
        RendererConfig $rendererConfig,
        mixed $result,
    ): Response {
        $renderer = $registry->tag(Renderer::class)->get($rendererConfig->type);
        assert($renderer instanceof Renderer);

        return $renderer->response($result, ...$rendererConfig->args);
    }

    protected function getClosure(array|string $view): Closure
    {
        if (is_array($view)) {
            [$controllerName, $method] = $view;
            assert(is_string($controllerName));
            assert(is_string($method));
        } else {
            if (!str_contains($view, '::')) {
                $view .= '::__invoke';
            }

            [$controllerName, $method] = explode('::', $view);
        }

        if (class_exists($controllerName)) {
            $rc = new ReflectionClass($controllerName);
            $constructor = $rc->getConstructor();
            $args = $constructor ? $this->getArgs($constructor) : [];
            $controller = $rc->newInstance(...$args);

            if (method_exists($controller, $method)) {
                return Closure::fromCallable([$controller, $method]);
            }
            $view = $controllerName . '::' . $method;

            throw new RuntimeException("View method not found {$view}");
        }

        throw new RuntimeException("Controller not found {$controllerName}");
    }

    /**
     * Determines the arguments passed to the view and/or controller constructor.
     *
     * - If a view parameter implements Request, the request will be passed.
     * - If names of the view parameters match names of the route arguments
     *   it will try to convert the argument to the parameter type and add it to
     *   the returned args list.
     * - If the parameter is typed, try to resolve it via registry or
     *   autowiring.
     * - Otherwise fail.
     *
     * @psalm-suppress MixedAssignment -- $args values are mixed
     */
    protected function getArgs(ReflectionFunctionAbstract $rf): array
    {
        /** @var array<string, mixed> */
        $args = [];
        $params = $rf->getParameters();
        $errMsg = 'View parameters cannot be resolved. Details: ';

        foreach ($params as $param) {
            $name = $param->getName();

            try {
                $args[$name] = match ((string)$param->getType()) {
                    'int' => is_numeric($this->routeArgs[$name]) ?
                        (int)$this->routeArgs[$name] :
                        throw new RuntimeException($errMsg . "Cannot cast '{$name}' to int"),
                    'float' => is_numeric($this->routeArgs[$name]) ?
                        (float)$this->routeArgs[$name] :
                        throw new RuntimeException($errMsg . "Cannot cast '{$name}' to float"),
                    'string' => $this->routeArgs[$name],
                    default => (new Resolver($this->registry))->resolveParam($param),
                };
            } catch (ContainerException $e) {
                throw $e;
            } catch (Throwable $e) {
                // Check if the view parameter has a default value
                if (!array_key_exists($name, $this->routeArgs) && $param->isDefaultValueAvailable()) {
                    $args[$name] = $param->getDefaultValue();

                    continue;
                }

                throw new RuntimeException($errMsg . $e->getMessage());
            }
        }

        assert(count($params) === count($args));

        return $args;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Conia\Chuck\Http;
6
7		use Closure;
8		use Conia\Chuck\Di\Resolver;
9		use Conia\Chuck\Exception\ContainerException;
10		use Conia\Chuck\Exception\RuntimeException;
11		use Conia\Chuck\Psr\Factory;
12		use Conia\Chuck\Registry;
13		use Conia\Chuck\Renderer\Config as RendererConfig;
14		use Conia\Chuck\Renderer\Render;
15		use Conia\Chuck\Renderer\Renderer;
16		use Conia\Chuck\Response;
17		use Conia\Chuck\Route;
18		use Psr\Http\Message\ResponseInterface as PsrResponse;
19		use ReflectionAttribute;
20		use ReflectionClass;
21		use ReflectionFunction;
22		use ReflectionFunctionAbstract;
23		use ReflectionMethod;
24		use ReflectionObject;
25		use Throwable;
26
27		class View
28		{
29		protected ?array $attributes = null;
30		protected Closure $closure;
31
32	42	public function __construct(
33		callable\|string\|array $view,
34		protected readonly array $routeArgs,
35		protected readonly Registry $registry
36		) {
37	42	if (is_callable($view)) {
38		/** @var callable $view -- Psalm complains even though we use is_callable() */
39	18	$this->closure = Closure::fromCallable($view);
40		} else {
41	24	$this->closure = $this->getClosure($view);
42		}
43		}
44
45	35	public function execute(): mixed
46		{
47	35	return ($this->closure)(...$this->getArgs(
48	35	self::getReflectionFunction($this->closure)
49	35	));
50		}
51
52	29	public function respond(
53		Route $route,
54		Registry $registry,
55		): Response {
56		/**
57		* @psalm-suppress MixedAssignment
58		*
59		* Later in the function we check the type of $result.
60		*/
61	29	$result = $this->execute();
62
63	25	if ($result instanceof Response) {
64	6	return $result;
65		}
66
67	19	if ($result instanceof PsrResponse) {
68	1	$factory = $registry->get(Factory::class);
69	1	assert($factory instanceof Factory);
70
71	1	return new Response($result, $factory);
72		}
73
74	18	$renderAttributes = $this->attributes(Render::class);
75
76	18	if (count($renderAttributes) > 0) {
77	8	assert($renderAttributes[0] instanceof Render);
78
79	8	return $renderAttributes[0]->response($registry, $result);
80		}
81
82	10	$rendererConfig = $route->getRenderer();
83
84	10	if ($rendererConfig) {
85	7	return $this->respondFromRenderer($registry, $rendererConfig, $result);
86		}
87
88	3	throw new RuntimeException('Unable to determine a response handler for the returned value of the view');
89		}
90
91	36	public static function getReflectionFunction(
92		callable $callable
93		): ReflectionFunction\|ReflectionMethod {
94	36	if ($callable instanceof Closure) {
95	36	return new ReflectionFunction($callable);
96		}
97	1	if (is_object($callable)) {
98	1	return (new ReflectionObject($callable))->getMethod('__invoke');
99		}
100		/** @var Closure\|non-falsy-string $callable */
101	1	return new ReflectionFunction($callable);
102		}
103
104		/** @psalm-param $filter ?class-string */
105	37	public function attributes(string $filter = null): array
106		{
107	37	$reflector = new ReflectionFunction($this->closure);
108
109	37	if (!isset($this->attributes)) {
110	37	$this->attributes = array_map(function ($attribute) {
111	19	return $this->newAttributeInstance($attribute);
112	37	}, $reflector->getAttributes());
113		}
114
115	37	if ($filter) {
116	31	return array_values(
117	31	array_filter($this->attributes, function ($attribute) use ($filter) {
118	13	return $attribute instanceof $filter;
119	31	})
120	31	);
121		}
122
123	8	return $this->attributes;
124		}
125
126	19	protected function newAttributeInstance(ReflectionAttribute $attribute): object
127		{
128	19	return (new Resolver($this->registry))
129	19	->resolveCallAttributes($attribute->newInstance());
130		}
131
132	7	protected function respondFromRenderer(
133		Registry $registry,
134		RendererConfig $rendererConfig,
135		mixed $result,
136		): Response {
137	7	$renderer = $registry->tag(Renderer::class)->get($rendererConfig->type);
138	7	assert($renderer instanceof Renderer);
139
140	7	return $renderer->response($result, ...$rendererConfig->args);
141		}
142
143	24	protected function getClosure(array\|string $view): Closure
144		{
145	24	if (is_array($view)) {
146	3	[$controllerName, $method] = $view;
147	3	assert(is_string($controllerName));
148	3	assert(is_string($method));
149		} else {
150	21	if (!str_contains($view, '::')) {
151	1	$view .= '::__invoke';
152		}
153
154	21	[$controllerName, $method] = explode('::', $view);
155		}
156
157	24	if (class_exists($controllerName)) {
158	23	$rc = new ReflectionClass($controllerName);
159	23	$constructor = $rc->getConstructor();
160	23	$args = $constructor ? $this->getArgs($constructor) : [];
161	23	$controller = $rc->newInstance(...$args);
162
163	23	if (method_exists($controller, $method)) {
164	22	return Closure::fromCallable([$controller, $method]);
165		}
166	1	$view = $controllerName . '::' . $method;
167
168	1	throw new RuntimeException("View method not found {$view}");
169		}
170
171	1	throw new RuntimeException("Controller not found {$controllerName}");
172		}
173
174		/**
175		* Determines the arguments passed to the view and/or controller constructor.
176		*
177		* - If a view parameter implements Request, the request will be passed.
178		* - If names of the view parameters match names of the route arguments
179		* it will try to convert the argument to the parameter type and add it to
180		* the returned args list.
181		* - If the parameter is typed, try to resolve it via registry or
182		* autowiring.
183		* - Otherwise fail.
184		*
185		* @psalm-suppress MixedAssignment -- $args values are mixed
186		*/
187	35	protected function getArgs(ReflectionFunctionAbstract $rf): array
188		{
189		/** @var array<string, mixed> */
190	35	$args = [];
191	35	$params = $rf->getParameters();
192	35	$errMsg = 'View parameters cannot be resolved. Details: ';
193
194	35	foreach ($params as $param) {
195	17	$name = $param->getName();
196
197		try {
198	17	$args[$name] = match ((string)$param->getType()) {
199	17	'int' => is_numeric($this->routeArgs[$name]) ?
200	3	(int)$this->routeArgs[$name] :
201	4	throw new RuntimeException($errMsg . "Cannot cast '{$name}' to int"),
202	17	'float' => is_numeric($this->routeArgs[$name]) ?
203	3	(float)$this->routeArgs[$name] :
204	4	throw new RuntimeException($errMsg . "Cannot cast '{$name}' to float"),
205	17	'string' => $this->routeArgs[$name],
206	17	default => (new Resolver($this->registry))->resolveParam($param),
207	17	};
208	6	} catch (ContainerException $e) {
209	2	throw $e;
210	4	} catch (Throwable $e) {
211		// Check if the view parameter has a default value
212	4	if (!array_key_exists($name, $this->routeArgs) && $param->isDefaultValueAvailable()) {
213	1	$args[$name] = $param->getDefaultValue();
214
215	1	continue;
216		}
217
218	3	throw new RuntimeException($errMsg . $e->getMessage());
219		}
220		}
221
222	33	assert(count($params) === count($args));
223
224	33	return $args;
225		}
226		}
227

coniadev / chuck

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View::getArgs() B

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Duplication

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