MetadataLoader::load() - Code Metrics - locomotivemtl/charcoal-core - Measure and Improve Code Quality continuously with Scrutinizer

MetadataLoader::load() B
last analyzed 2019-10-30 23:55 UTC

↳ Parent: MetadataLoader

Complexity

Conditions	11
Paths	15

Size

Total Lines	48
Code Lines	28

Duplication

Lines	0
Ratio	0 %

Importance

Changes	5
Bugs	0	Features	0

Metric	Value
cc	11
eloc	28
nc	15
nop	3
dl	0
loc	48
rs	7.3166
c	5
b	0
f	0

How to fix Complexity

<?php

namespace Charcoal\Model\Service;

use RuntimeException;
use InvalidArgumentException;
use UnexpectedValueException;

// From PSR-3
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerAwareTrait;

// From PSR-6
use Psr\Cache\CacheItemPoolInterface;

// From 'charcoal-core'
use Charcoal\Model\MetadataInterface;

/**
 * Load metadata from JSON file(s).
 *
 * The Metadata Loader is different than the `FileLoader` class it extends mainly because
 * it tries to find all files matching  the "ident" in all search path and merge them together
 * in an array, to be filled in a `Metadata` object.
 *
 * If `ident` is an actual class name, then it will also try to load all the JSON matching
 * the class' parents and interfaces.
 */
final class MetadataLoader implements LoggerAwareInterface
{
    use LoggerAwareTrait;

    /**
     * The PSR-6 caching service.
     *
     * @var CacheItemPoolInterface
     */
    private $cachePool;

    /**
     * The cache of metadata instances, indexed by metadata identifier.
     *
     * @var MetadataInterface[]
     */
    private static $metadataCache = [];

    /**
     * The cache of class/interface lineages.
     *
     * @var array
     */
    private static $lineageCache = [];

    /**
     * The cache of snake-cased words.
     *
     * @var array
     */
    private static $snakeCache = [];

    /**
     * The cache of camel-cased words.
     *
     * @var array
     */
    private static $camelCache = [];

    /**
     * The base path to prepend to any relative paths to search in.
     *
     * @var string
     */
    private $basePath = '';

    /**
     * The paths to search in.
     *
     * @var array
     */
    private $paths = [];

    /**
     * Return new MetadataLoader object.
     *
     * The application's metadata paths, if any, are merged with
     * the loader's search paths.
     *
     * # Required dependencie
     * - `logger`
     * - `cache`
     * - `paths`
     * - `base_path`
     *
     * @param  array $data The loader's dependencies.
     * @return void
     */
    public function __construct(array $data = null)
    {
        $this->setLogger($data['logger']);
        $this->setCachePool($data['cache']);
        $this->setBasePath($data['base_path']);
        $this->setPaths($data['paths']);
    }

    /**
     * Load the metadata for the given identifier or interfaces.
     *
     * Notes:
     * - If the requested dataset is found, it will be stored in the cache service.
     * - If the provided metadata container is an {@see MetadataInterface object},
     *   it will be stored for the lifetime of the script (whether it be a longer
     *   running process or a web request).
     *
     * @param  string $ident    The metadata identifier to load.
     * @param  mixed  $metadata The metadata type to load the dataset into.
     *     If $metadata is a {@see MetadataInterface} instance, the requested dataset will be merged into the object.
     *     If $metadata is a class name, the requested dataset will be stored in a new instance of that class.
     *     If $metadata is an array, the requested dataset will be merged into the array.
     * @param  array  $idents   The metadata identifier(s) to load.
     *     If $idents is provided, $ident will be used as the cache key
     *     and $idents are loaded instead.
     * @throws InvalidArgumentException If the identifier is not a string.
     * @return MetadataInterface|array Returns the dataset, for the given $ident,
     *     as an array or an instance of {@see MetadataInterface}.
     *     See $metadata for more details.
     */
    public function load($ident, $metadata = [], array $idents = null)
    {
        if (!is_string($ident)) {

            throw new InvalidArgumentException(sprintf(
                'Metadata identifier must be a string, received %s',
                is_object($ident) ? get_class($ident) : gettype($ident)
            ));
        }

        if (strpos($ident, '\\') !== false) {
            $ident = $this->metaKeyFromClassName($ident);
        }

        $valid = $this->validateMetadataContainer($metadata, $metadataType, $targetMetadata);
        if ($valid === false) {
            throw new InvalidArgumentException(sprintf(
                'Metadata object must be a class name or instance of %s, received %s',
                MetadataInterface::class,
                is_object($metadata) ? get_class($metadata) : gettype($metadata)
            ));
        }

        if (isset(static::$metadataCache[$ident])) {

            $cachedMetadata = static::$metadataCache[$ident];

            if (is_object($targetMetadata)) {
                return $targetMetadata->merge($cachedMetadata);
            } elseif (is_array($targetMetadata)) {
                return array_replace_recursive($targetMetadata, $cachedMetadata->data());
            }

            return $cachedMetadata;
        }

        $data = $this->loadMetadataFromCache($ident, $idents);

        if (is_object($targetMetadata)) {
            return $targetMetadata->merge($data);
        } elseif (is_array($targetMetadata)) {
            return array_replace_recursive($targetMetadata, $data);
        }

        $targetMetadata = new $metadataType;
        $targetMetadata->setData($data);

        static::$metadataCache[$ident] = $targetMetadata;

        return $targetMetadata;
    }

    /**
     * Fetch the metadata for the given identifier.
     *
     * @param  string $ident The metadata identifier to load.
     * @throws InvalidArgumentException If the identifier is not a string.
     * @return array
     */
    public function loadMetadataByKey($ident)
    {
        if (!is_string($ident)) {

            throw new InvalidArgumentException(
                'Metadata identifier must be a string'
            );
        }

        $lineage  = $this->hierarchy($ident);
        $metadata = [];
        foreach ($lineage as $metaKey) {
            $data = $this->loadMetadataFromSource($metaKey);
            if (is_array($data)) {
                $metadata = array_replace_recursive($metadata, $data);
            }
        }

        return $metadata;
    }

    /**
     * Fetch the metadata for the given identifiers.
     *
     * @param  array $idents One or more metadata identifiers to load.
     * @return array
     */
    public function loadMetadataByKeys(array $idents)
    {
        $metadata = [];
        foreach ($idents as $metaKey) {
            $data = $this->loadMetadataByKey($metaKey);
            if (is_array($data)) {
                $metadata = array_replace_recursive($metadata, $data);
            }
        }

        return $metadata;
    }

    /**
     * Build a class/interface lineage from the given snake-cased namespace.
     *
     * @param  string $ident The FQCN (in snake-case) to load the hierarchy from.
     * @return array
     */
    private function hierarchy($ident)
    {
        if (!is_string($ident)) {

            return [];
        }

        if (isset(static::$lineageCache[$ident])) {

            return static::$lineageCache[$ident];
        }

        $classname = $this->classNameFromMetaKey($ident);

        return $this->classLineage($classname, $ident);
    }

    /**
     * Build a class/interface lineage from the given PHP namespace.
     *
     * @param  string      $class The FQCN to load the hierarchy from.
     * @param  string|null $ident Optional. The snake-cased $class.
     * @return array
     */
    private function classLineage($class, $ident = null)
    {
        if (!is_string($class)) {

            return [];
        }

        if ($ident === null) {
            $ident = $this->metaKeyFromClassName($class);
        }

        if (isset(static::$lineageCache[$ident])) {

            return static::$lineageCache[$ident];
        }

        $class = $this->classNameFromMetaKey($ident);

        if (!class_exists($class) && !interface_exists($class)) {
            return [ $ident ];
        }

        $classes   = array_values(class_parents($class));
        $classes   = array_reverse($classes);
        $classes[] = $class;

        $hierarchy = [];
        foreach ($classes as $class) {

            $implements = array_values(class_implements($class));
            $implements = array_reverse($implements);
            foreach ($implements as $interface) {
                $hierarchy[$this->metaKeyFromClassName($interface)] = 1;
            }
            $hierarchy[$this->metaKeyFromClassName($class)] = 1;
        }

        $hierarchy = array_keys($hierarchy);

        static::$lineageCache[$ident] = $hierarchy;

        return $hierarchy;
    }

    /**
     * Load a metadataset from the cache.
     *
     * @param  string $ident  The metadata identifier to load / cache key for $idents.
     * @param  array  $idents If provided, $ident is used as the cache key
     *     and these metadata identifiers are loaded instead.
     * @return array The data associated with the metadata identifier.
     */
    private function loadMetadataFromCache($ident, array $idents = null)
    {
        $cacheKey  = $this->cacheKeyFromMetaKey($ident);
        $cacheItem = $this->cachePool()->getItem($cacheKey);

        if ($cacheItem->isHit()) {
            $metadata = $cacheItem->get();

            /** Backwards compatibility */
            if ($metadata instanceof MetadataInterface) {
                $metadata = $metadata->data();
                $cacheItem->set($metadata);
                $this->cachePool()->save($cacheItem);
            }

            return $metadata;
        } else {
            if (empty($idents)) {
                $metadata = $this->loadMetadataByKey($ident);
            } else {
                $metadata = $this->loadMetadataByKeys($idents);
            }

            $cacheItem->set($metadata);
            $this->cachePool()->save($cacheItem);
        }

        return $metadata;
    }

    /**
     * Load a metadata file from the given metdata identifier.
     *
     * The file is converted to JSON, the only supported format.
     *
     * @param  string $ident The metadata identifier to fetch.
     * @return array|null An associative array on success, NULL on failure.
     */
    private function loadMetadataFromSource($ident)
    {
        $path = $this->filePathFromMetaKey($ident);
        return $this->loadFile($path);
    }

    /**
     * Load a file as an array.
     *
     * Supported file types: JSON.
     *
     * @param  string $path A file path to resolve and fetch.
     * @return array|null An associative array on success, NULL on failure.
     */
    private function loadFile($path)
    {
        if (file_exists($path)) {
            return $this->loadJsonFile($path);
        }

        $dirs = $this->paths();
        if (empty($dirs)) {
            return null;
        }

        $data = [];
        $dirs = array_reverse($dirs);
        foreach ($dirs as $dir) {
            $file = $dir.DIRECTORY_SEPARATOR.$path;
            if (file_exists($file)) {
                $data = array_replace_recursive($data, $this->loadJsonFile($file));
            }
        }

        if (empty($data)) {
            return null;
        }

        return $data;
    }

    /**
     * Load a JSON file as an array.
     *
     * @param  string $path A path to a JSON file.
     * @throws UnexpectedValueException If the file can not correctly be parsed into an array.
     * @return array An associative array on success.
     */
    private function loadJsonFile($path)
    {
        $data = json_decode(file_get_contents($path), true);
        if (json_last_error() !== JSON_ERROR_NONE) {
            $error = json_last_error_msg() ?: 'Unknown error';
            throw new UnexpectedValueException(
                sprintf('JSON file "%s" could not be parsed: "%s"', $path, $error)
            );
        }

        if (!is_array($data)) {
            throw new UnexpectedValueException(
                sprintf('JSON file "%s" does not return an array', $path)
            );
        }

        return $data;
    }

    /**
     * Generate a store key.
     *
     * @param  string|string[] $ident The metadata identifier(s) to convert.
     * @return string
     */
    public function serializeMetaKey($ident)
    {
        if (is_array($ident)) {
            sort($ident);
            $ident = implode(':', $ident);
        }

        return md5($ident);
    }

    /**
     * Generate a cache key.
     *
     * @param  string $ident The metadata identifier to convert.
     * @return string
     */
    public function cacheKeyFromMetaKey($ident)
    {
        $cacheKey = 'metadata/'.str_replace('/', '.', $ident);
        return $cacheKey;
    }

    /**
     * Convert a snake-cased namespace to a file path.
     *
     * @param  string $ident The metadata identifier to convert.
     * @return string
     */
    private function filePathFromMetaKey($ident)
    {
        $filename  = str_replace('\\', '.', $ident);
        $filename .= '.json';

        return $filename;
    }

    /**
     * Convert a kebab-cased namespace to CamelCase.
     *
     * @param  string $ident The metadata identifier to convert.
     * @return string Returns a valid PHP namespace.
     */
    private function classNameFromMetaKey($ident)
    {
        $key = $ident;

        if (isset(static::$camelCache[$key])) {

            return static::$camelCache[$key];
        }

        // Change "foo-bar" to "fooBar"
        $parts = explode('-', $ident);
        array_walk(
            $parts,
            function(&$i) {
                $i = ucfirst($i);
            }
        );
        $ident = implode('', $parts);

        // Change "/foo/bar" to "\Foo\Bar"
        $classname = str_replace('/', '\\', $ident);
        $parts     = explode('\\', $classname);

        array_walk(
            $parts,
            function(&$i) {
                $i = ucfirst($i);
            }
        );

        $classname = trim(implode('\\', $parts), '\\');

        static::$camelCache[$key]       = $classname;
        static::$snakeCache[$classname] = $key;


        return $classname;
    }

    /**
     * Convert a CamelCase namespace to kebab-case.
     *
     * @param  string $class The FQCN to convert.
     * @return string Returns a kebab-cased namespace.
     */
    private function metaKeyFromClassName($class)
    {
        $key = trim($class, '\\');

        if (isset(static::$snakeCache[$key])) {

            return static::$snakeCache[$key];
        }

        $ident = strtolower(preg_replace('/([a-z])([A-Z])/', '$1-$2', $class));
        $ident = str_replace('\\', '/', strtolower($ident));
        $ident = ltrim($ident, '/');

        static::$snakeCache[$key]   = $ident;
        static::$camelCache[$ident] = $key;


        return $ident;
    }

    /**
     * Validate a metadata type or container.
     *
     * If specified, the method will also resolve the metadata type or container.
     *
     * @param  mixed       $metadata The metadata type or container to validate.
     * @param  string|null $type     If provided, then it is filled with the resolved metadata type.
     * @param  mixed|null  $bag      If provided, then it is filled with the resolved metadata container.
     * @return boolean
     */
    private function validateMetadataContainer($metadata, &$type = null, &$bag = null)
    {
        // If variables are provided, clear existing values.
        $type = null;
        $bag  = null;

        if (is_array($metadata)) {
            $type = 'array';
            $bag  = $metadata;
            return true;
        }

        if (is_a($metadata, MetadataInterface::class, true)) {
            if (is_object($metadata)) {
                $type = get_class($metadata);
                $bag  = $metadata;
                return true;
            }
            if (is_string($metadata)) {
                $type = $metadata;
                return true;
            }
        }

        return false;
    }

    /**
     * Assign a base path for relative search paths.
     *
     * @param  string $basePath The base path to use.
     * @throws InvalidArgumentException If the base path parameter is not a string.
     * @return void
     */
    private function setBasePath($basePath)
    {
        if (!is_string($basePath)) {

            throw new InvalidArgumentException(
                'Base path must be a string'
            );
        }

        $basePath = realpath($basePath);
        $this->basePath = rtrim($basePath, '/\\').DIRECTORY_SEPARATOR;
    }

    /**
     * Retrieve the base path for relative search paths.
     *
     * @return string
     */
    private function basePath()
    {
        return $this->basePath;
    }

    /**
     * Assign many search paths.
     *
     * @param  string[] $paths One or more search paths.
     * @return void
     */
    private function setPaths(array $paths)
    {
        $this->paths = [];
        $this->addPaths($paths);
    }

    /**
     * Retrieve search paths.
     *
     * @return string[]
     */
    private function paths()
    {
        return $this->paths;
    }

    /**
     * Append many search paths.
     *
     * @param  string[] $paths One or more search paths.
     * @return self
     */
    private function addPaths(array $paths)
    {
        foreach ($paths as $path) {
            $this->addPath($path);
        }

        return $this;
    }

    /**
     * Append a search path.
     *
     * @param  string $path A directory path.
     * @return self
     */
    private function addPath($path)
    {
        $path = $this->resolvePath($path);

        if ($this->validatePath($path)) {
            $this->paths[] = $path;
        }

        return $this;
    }

    /**
     * Parse a relative path using the base path if needed.
     *
     * @param  string $path The path to resolve.
     * @throws InvalidArgumentException If the path is invalid.
     * @return string
     */
    private function resolvePath($path)
    {
        if (!is_string($path)) {

            throw new InvalidArgumentException(
                'Path needs to be a string'
            );
        }

        $basePath = $this->basePath();
        $path = trim($path, '/\\');

        if ($basePath && strpos($path, $basePath) === false) {
            $path = $basePath.$path;
        }

        return $path;
    }

    /**
     * Validate a resolved path.
     *
     * @param  string $path The path to validate.
     * @return string
     */
    private function validatePath($path)
    {
        return is_dir($path);

    }

    /**
     * Set the cache service.
     *
     * @param  CacheItemPoolInterface $cache A PSR-6 compliant cache pool instance.
     * @return void
     */
    private function setCachePool(CacheItemPoolInterface $cache)
    {
        $this->cachePool = $cache;
    }

    /**
     * Retrieve the cache service.
     *
     * @return CacheItemPoolInterface
     */
    private function cachePool()
    {
        return $this->cachePool;
    }
}


1			<?php
2
3			namespace Charcoal\Model\Service;
4
5			use RuntimeException;
6			use InvalidArgumentException;
7			use UnexpectedValueException;
8
9			// From PSR-3
10			use Psr\Log\LoggerAwareInterface;
11			use Psr\Log\LoggerAwareTrait;
12
13			// From PSR-6
14			use Psr\Cache\CacheItemPoolInterface;
15
16			// From 'charcoal-core'
17			use Charcoal\Model\MetadataInterface;
18
19			/**
20			* Load metadata from JSON file(s).
21			*
22			* The Metadata Loader is different than the `FileLoader` class it extends mainly because
23			* it tries to find all files matching the "ident" in all search path and merge them together
24			* in an array, to be filled in a `Metadata` object.
25			*
26			* If `ident` is an actual class name, then it will also try to load all the JSON matching
27			* the class' parents and interfaces.
28			*/
29			final class MetadataLoader implements LoggerAwareInterface
30			{
31			use LoggerAwareTrait;
32
33			/**
34			* The PSR-6 caching service.
35			*
36			* @var CacheItemPoolInterface
37			*/
38			private $cachePool;
39
40			/**
41			* The cache of metadata instances, indexed by metadata identifier.
42			*
43			* @var MetadataInterface[]
44			*/
45			private static $metadataCache = [];
46
47			/**
48			* The cache of class/interface lineages.
49			*
50			* @var array
51			*/
52			private static $lineageCache = [];
53
54			/**
55			* The cache of snake-cased words.
56			*
57			* @var array
58			*/
59			private static $snakeCache = [];
60
61			/**
62			* The cache of camel-cased words.
63			*
64			* @var array
65			*/
66			private static $camelCache = [];
67
68			/**
69			* The base path to prepend to any relative paths to search in.
70			*
71			* @var string
72			*/
73			private $basePath = '';
74
75			/**
76			* The paths to search in.
77			*
78			* @var array
79			*/
80			private $paths = [];
81
82			/**
83			* Return new MetadataLoader object.
84			*
85			* The application's metadata paths, if any, are merged with
86			* the loader's search paths.
87			*
88			* # Required dependencie
89			* - `logger`
90			* - `cache`
91			* - `paths`
92			* - `base_path`
93			*
94			* @param array $data The loader's dependencies.
95			* @return void
96			*/
97			public function __construct(array $data = null)
98			{
99			$this->setLogger($data['logger']);
100			$this->setCachePool($data['cache']);
101			$this->setBasePath($data['base_path']);
102			$this->setPaths($data['paths']);
103			}
104
105			/**
106			* Load the metadata for the given identifier or interfaces.
107			*
108			* Notes:
109			* - If the requested dataset is found, it will be stored in the cache service.
110			* - If the provided metadata container is an {@see MetadataInterface object},
111			* it will be stored for the lifetime of the script (whether it be a longer
112			* running process or a web request).
113			*
114			* @param string $ident The metadata identifier to load.
115			* @param mixed $metadata The metadata type to load the dataset into.
116			* If $metadata is a {@see MetadataInterface} instance, the requested dataset will be merged into the object.
117			* If $metadata is a class name, the requested dataset will be stored in a new instance of that class.
118			* If $metadata is an array, the requested dataset will be merged into the array.
119			* @param array $idents The metadata identifier(s) to load.
120			* If $idents is provided, $ident will be used as the cache key
121			* and $idents are loaded instead.
122			* @throws InvalidArgumentException If the identifier is not a string.
123			* @return MetadataInterface\|array Returns the dataset, for the given $ident,
124			* as an array or an instance of {@see MetadataInterface}.
125			* See $metadata for more details.
126			*/
127			public function load($ident, $metadata = [], array $idents = null)
128			{
129			if (!is_string($ident)) {
			0 ignored issues – show introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report The condition `is_string($ident)` is always `true`. Loading history...
130			throw new InvalidArgumentException(sprintf(
131			'Metadata identifier must be a string, received %s',
132			is_object($ident) ? get_class($ident) : gettype($ident)
133			));
134			}
135
136			if (strpos($ident, '\\') !== false) {
137			$ident = $this->metaKeyFromClassName($ident);
138			}
139
140			$valid = $this->validateMetadataContainer($metadata, $metadataType, $targetMetadata);
141			if ($valid === false) {
142			throw new InvalidArgumentException(sprintf(
143			'Metadata object must be a class name or instance of %s, received %s',
144			MetadataInterface::class,
145			is_object($metadata) ? get_class($metadata) : gettype($metadata)
146			));
147			}
148
149			if (isset(static::$metadataCache[$ident])) {
			0 ignored issues – show Bug introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report Since `$metadataCache` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$metadataCache` to at least protected. Loading history...
150			$cachedMetadata = static::$metadataCache[$ident];
151
152			if (is_object($targetMetadata)) {
153			return $targetMetadata->merge($cachedMetadata);
154			} elseif (is_array($targetMetadata)) {
155			return array_replace_recursive($targetMetadata, $cachedMetadata->data());
156			}
157
158			return $cachedMetadata;
159			}
160
161			$data = $this->loadMetadataFromCache($ident, $idents);
162
163			if (is_object($targetMetadata)) {
164			return $targetMetadata->merge($data);
165			} elseif (is_array($targetMetadata)) {
166			return array_replace_recursive($targetMetadata, $data);
167			}
168
169			$targetMetadata = new $metadataType;
170			$targetMetadata->setData($data);
171
172			static::$metadataCache[$ident] = $targetMetadata;
173
174			return $targetMetadata;
175			}
176
177			/**
178			* Fetch the metadata for the given identifier.
179			*
180			* @param string $ident The metadata identifier to load.
181			* @throws InvalidArgumentException If the identifier is not a string.
182			* @return array
183			*/
184			public function loadMetadataByKey($ident)
185			{
186			if (!is_string($ident)) {
			0 ignored issues – show introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report The condition `is_string($ident)` is always `true`. Loading history...
187			throw new InvalidArgumentException(
188			'Metadata identifier must be a string'
189			);
190			}
191
192			$lineage = $this->hierarchy($ident);
193			$metadata = [];
194			foreach ($lineage as $metaKey) {
195			$data = $this->loadMetadataFromSource($metaKey);
196			if (is_array($data)) {
197			$metadata = array_replace_recursive($metadata, $data);
198			}
199			}
200
201			return $metadata;
202			}
203
204			/**
205			* Fetch the metadata for the given identifiers.
206			*
207			* @param array $idents One or more metadata identifiers to load.
208			* @return array
209			*/
210			public function loadMetadataByKeys(array $idents)
211			{
212			$metadata = [];
213			foreach ($idents as $metaKey) {
214			$data = $this->loadMetadataByKey($metaKey);
215			if (is_array($data)) {
216			$metadata = array_replace_recursive($metadata, $data);
217			}
218			}
219
220			return $metadata;
221			}
222
223			/**
224			* Build a class/interface lineage from the given snake-cased namespace.
225			*
226			* @param string $ident The FQCN (in snake-case) to load the hierarchy from.
227			* @return array
228			*/
229			private function hierarchy($ident)
230			{
231			if (!is_string($ident)) {
			0 ignored issues – show introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report The condition `is_string($ident)` is always `true`. Loading history...
232			return [];
233			}
234
235			if (isset(static::$lineageCache[$ident])) {
			0 ignored issues – show Bug introduced 2017-12-04 16:45 UTC by Report Bug Copy Issue Report Since `$lineageCache` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$lineageCache` to at least protected. Loading history...
236			return static::$lineageCache[$ident];
237			}
238
239			$classname = $this->classNameFromMetaKey($ident);
240
241			return $this->classLineage($classname, $ident);
242			}
243
244			/**
245			* Build a class/interface lineage from the given PHP namespace.
246			*
247			* @param string $class The FQCN to load the hierarchy from.
248			* @param string\|null $ident Optional. The snake-cased $class.
249			* @return array
250			*/
251			private function classLineage($class, $ident = null)
252			{
253			if (!is_string($class)) {
			0 ignored issues – show introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report The condition `is_string($class)` is always `true`. Loading history...
254			return [];
255			}
256
257			if ($ident === null) {
258			$ident = $this->metaKeyFromClassName($class);
259			}
260
261			if (isset(static::$lineageCache[$ident])) {
			0 ignored issues – show Bug introduced 2017-12-04 16:45 UTC by Report Bug Copy Issue Report Since `$lineageCache` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$lineageCache` to at least protected. Loading history...
262			return static::$lineageCache[$ident];
263			}
264
265			$class = $this->classNameFromMetaKey($ident);
266
267			if (!class_exists($class) && !interface_exists($class)) {
268			return [ $ident ];
269			}
270
271			$classes = array_values(class_parents($class));
272			$classes = array_reverse($classes);
273			$classes[] = $class;
274
275			$hierarchy = [];
276			foreach ($classes as $class) {
			0 ignored issues – show introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report `$class` is overwriting one of the parameters of this function. Loading history...
277			$implements = array_values(class_implements($class));
278			$implements = array_reverse($implements);
279			foreach ($implements as $interface) {
280			$hierarchy[$this->metaKeyFromClassName($interface)] = 1;
281			}
282			$hierarchy[$this->metaKeyFromClassName($class)] = 1;
283			}
284
285			$hierarchy = array_keys($hierarchy);
286
287			static::$lineageCache[$ident] = $hierarchy;
288
289			return $hierarchy;
290			}
291
292			/**
293			* Load a metadataset from the cache.
294			*
295			* @param string $ident The metadata identifier to load / cache key for $idents.
296			* @param array $idents If provided, $ident is used as the cache key
297			* and these metadata identifiers are loaded instead.
298			* @return array The data associated with the metadata identifier.
299			*/
300			private function loadMetadataFromCache($ident, array $idents = null)
301			{
302			$cacheKey = $this->cacheKeyFromMetaKey($ident);
303			$cacheItem = $this->cachePool()->getItem($cacheKey);
304
305			if ($cacheItem->isHit()) {
306			$metadata = $cacheItem->get();
307
308			/** Backwards compatibility */
309			if ($metadata instanceof MetadataInterface) {
310			$metadata = $metadata->data();
311			$cacheItem->set($metadata);
312			$this->cachePool()->save($cacheItem);
313			}
314
315			return $metadata;
316			} else {
317			if (empty($idents)) {
318			$metadata = $this->loadMetadataByKey($ident);
319			} else {
320			$metadata = $this->loadMetadataByKeys($idents);
321			}
322
323			$cacheItem->set($metadata);
324			$this->cachePool()->save($cacheItem);
325			}
326
327			return $metadata;
328			}
329
330			/**
331			* Load a metadata file from the given metdata identifier.
332			*
333			* The file is converted to JSON, the only supported format.
334			*
335			* @param string $ident The metadata identifier to fetch.
336			* @return array\|null An associative array on success, NULL on failure.
337			*/
338			private function loadMetadataFromSource($ident)
339			{
340			$path = $this->filePathFromMetaKey($ident);
341			return $this->loadFile($path);
342			}
343
344			/**
345			* Load a file as an array.
346			*
347			* Supported file types: JSON.
348			*
349			* @param string $path A file path to resolve and fetch.
350			* @return array\|null An associative array on success, NULL on failure.
351			*/
352			private function loadFile($path)
353			{
354			if (file_exists($path)) {
355			return $this->loadJsonFile($path);
356			}
357
358			$dirs = $this->paths();
359			if (empty($dirs)) {
360			return null;
361			}
362
363			$data = [];
364			$dirs = array_reverse($dirs);
365			foreach ($dirs as $dir) {
366			$file = $dir.DIRECTORY_SEPARATOR.$path;
367			if (file_exists($file)) {
368			$data = array_replace_recursive($data, $this->loadJsonFile($file));
369			}
370			}
371
372			if (empty($data)) {
373			return null;
374			}
375
376			return $data;
377			}
378
379			/**
380			* Load a JSON file as an array.
381			*
382			* @param string $path A path to a JSON file.
383			* @throws UnexpectedValueException If the file can not correctly be parsed into an array.
384			* @return array An associative array on success.
385			*/
386			private function loadJsonFile($path)
387			{
388			$data = json_decode(file_get_contents($path), true);
389			if (json_last_error() !== JSON_ERROR_NONE) {
390			$error = json_last_error_msg() ?: 'Unknown error';
391			throw new UnexpectedValueException(
392			sprintf('JSON file "%s" could not be parsed: "%s"', $path, $error)
393			);
394			}
395
396			if (!is_array($data)) {
397			throw new UnexpectedValueException(
398			sprintf('JSON file "%s" does not return an array', $path)
399			);
400			}
401
402			return $data;
403			}
404
405			/**
406			* Generate a store key.
407			*
408			* @param string\|string[] $ident The metadata identifier(s) to convert.
409			* @return string
410			*/
411			public function serializeMetaKey($ident)
412			{
413			if (is_array($ident)) {
414			sort($ident);
415			$ident = implode(':', $ident);
416			}
417
418			return md5($ident);
419			}
420
421			/**
422			* Generate a cache key.
423			*
424			* @param string $ident The metadata identifier to convert.
425			* @return string
426			*/
427			public function cacheKeyFromMetaKey($ident)
428			{
429			$cacheKey = 'metadata/'.str_replace('/', '.', $ident);
430			return $cacheKey;
431			}
432
433			/**
434			* Convert a snake-cased namespace to a file path.
435			*
436			* @param string $ident The metadata identifier to convert.
437			* @return string
438			*/
439			private function filePathFromMetaKey($ident)
440			{
441			$filename = str_replace('\\', '.', $ident);
442			$filename .= '.json';
443
444			return $filename;
445			}
446
447			/**
448			* Convert a kebab-cased namespace to CamelCase.
449			*
450			* @param string $ident The metadata identifier to convert.
451			* @return string Returns a valid PHP namespace.
452			*/
453			private function classNameFromMetaKey($ident)
454			{
455			$key = $ident;
456
457			if (isset(static::$camelCache[$key])) {
			0 ignored issues – show Bug introduced 2017-12-04 16:45 UTC by Report Bug Copy Issue Report Since `$camelCache` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$camelCache` to at least protected. Loading history...
458			return static::$camelCache[$key];
459			}
460
461			// Change "foo-bar" to "fooBar"
462			$parts = explode('-', $ident);
463			array_walk(
464			$parts,
465			function(&$i) {
466			$i = ucfirst($i);
467			}
468			);
469			$ident = implode('', $parts);
470
471			// Change "/foo/bar" to "\Foo\Bar"
472			$classname = str_replace('/', '\\', $ident);
473			$parts = explode('\\', $classname);
474
475			array_walk(
476			$parts,
477			function(&$i) {
478			$i = ucfirst($i);
479			}
480			);
481
482			$classname = trim(implode('\\', $parts), '\\');
483
484			static::$camelCache[$key] = $classname;
485			static::$snakeCache[$classname] = $key;
			0 ignored issues – show Bug introduced 2017-12-04 16:45 UTC by Report Bug Copy Issue Report Since `$snakeCache` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$snakeCache` to at least protected. Loading history...
486
487			return $classname;
488			}
489
490			/**
491			* Convert a CamelCase namespace to kebab-case.
492			*
493			* @param string $class The FQCN to convert.
494			* @return string Returns a kebab-cased namespace.
495			*/
496			private function metaKeyFromClassName($class)
497			{
498			$key = trim($class, '\\');
499
500			if (isset(static::$snakeCache[$key])) {
			0 ignored issues – show Bug introduced 2017-12-04 16:45 UTC by Report Bug Copy Issue Report Since `$snakeCache` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$snakeCache` to at least protected. Loading history...
501			return static::$snakeCache[$key];
502			}
503
504			$ident = strtolower(preg_replace('/([a-z])([A-Z])/', '$1-$2', $class));
505			$ident = str_replace('\\', '/', strtolower($ident));
506			$ident = ltrim($ident, '/');
507
508			static::$snakeCache[$key] = $ident;
509			static::$camelCache[$ident] = $key;
			0 ignored issues – show Bug introduced 2017-12-04 16:45 UTC by Report Bug Copy Issue Report Since `$camelCache` is declared private, accessing it with `static` will lead to errors in possible sub-classes; you can either use `self`, or increase the visibility of `$camelCache` to at least protected. Loading history...
510
511			return $ident;
512			}
513
514			/**
515			* Validate a metadata type or container.
516			*
517			* If specified, the method will also resolve the metadata type or container.
518			*
519			* @param mixed $metadata The metadata type or container to validate.
520			* @param string\|null $type If provided, then it is filled with the resolved metadata type.
521			* @param mixed\|null $bag If provided, then it is filled with the resolved metadata container.
522			* @return boolean
523			*/
524			private function validateMetadataContainer($metadata, &$type = null, &$bag = null)
525			{
526			// If variables are provided, clear existing values.
527			$type = null;
528			$bag = null;
529
530			if (is_array($metadata)) {
531			$type = 'array';
532			$bag = $metadata;
533			return true;
534			}
535
536			if (is_a($metadata, MetadataInterface::class, true)) {
537			if (is_object($metadata)) {
538			$type = get_class($metadata);
539			$bag = $metadata;
540			return true;
541			}
542			if (is_string($metadata)) {
543			$type = $metadata;
544			return true;
545			}
546			}
547
548			return false;
549			}
550
551			/**
552			* Assign a base path for relative search paths.
553			*
554			* @param string $basePath The base path to use.
555			* @throws InvalidArgumentException If the base path parameter is not a string.
556			* @return void
557			*/
558			private function setBasePath($basePath)
559			{
560			if (!is_string($basePath)) {
			0 ignored issues – show introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report The condition `is_string($basePath)` is always `true`. Loading history...
561			throw new InvalidArgumentException(
562			'Base path must be a string'
563			);
564			}
565
566			$basePath = realpath($basePath);
567			$this->basePath = rtrim($basePath, '/\\').DIRECTORY_SEPARATOR;
568			}
569
570			/**
571			* Retrieve the base path for relative search paths.
572			*
573			* @return string
574			*/
575			private function basePath()
576			{
577			return $this->basePath;
578			}
579
580			/**
581			* Assign many search paths.
582			*
583			* @param string[] $paths One or more search paths.
584			* @return void
585			*/
586			private function setPaths(array $paths)
587			{
588			$this->paths = [];
589			$this->addPaths($paths);
590			}
591
592			/**
593			* Retrieve search paths.
594			*
595			* @return string[]
596			*/
597			private function paths()
598			{
599			return $this->paths;
600			}
601
602			/**
603			* Append many search paths.
604			*
605			* @param string[] $paths One or more search paths.
606			* @return self
607			*/
608			private function addPaths(array $paths)
609			{
610			foreach ($paths as $path) {
611			$this->addPath($path);
612			}
613
614			return $this;
615			}
616
617			/**
618			* Append a search path.
619			*
620			* @param string $path A directory path.
621			* @return self
622			*/
623			private function addPath($path)
624			{
625			$path = $this->resolvePath($path);
626
627			if ($this->validatePath($path)) {
628			$this->paths[] = $path;
629			}
630
631			return $this;
632			}
633
634			/**
635			* Parse a relative path using the base path if needed.
636			*
637			* @param string $path The path to resolve.
638			* @throws InvalidArgumentException If the path is invalid.
639			* @return string
640			*/
641			private function resolvePath($path)
642			{
643			if (!is_string($path)) {
			0 ignored issues – show introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report The condition `is_string($path)` is always `true`. Loading history...
644			throw new InvalidArgumentException(
645			'Path needs to be a string'
646			);
647			}
648
649			$basePath = $this->basePath();
650			$path = trim($path, '/\\');
651
652			if ($basePath && strpos($path, $basePath) === false) {
653			$path = $basePath.$path;
654			}
655
656			return $path;
657			}
658
659			/**
660			* Validate a resolved path.
661			*
662			* @param string $path The path to validate.
663			* @return string
664			*/
665			private function validatePath($path)
666			{
667			return is_dir($path);
			0 ignored issues – show Bug Best Practice introduced 2019-10-30 14:30 UTC by Report Bug Copy Issue Report The expression `return is_dir($path)` returns the type `boolean` which is incompatible with the documented return type `string`. Loading history...
668			}
669
670			/**
671			* Set the cache service.
672			*
673			* @param CacheItemPoolInterface $cache A PSR-6 compliant cache pool instance.
674			* @return void
675			*/
676			private function setCachePool(CacheItemPoolInterface $cache)
677			{
678			$this->cachePool = $cache;
679			}
680
681			/**
682			* Retrieve the cache service.
683			*
684			* @return CacheItemPoolInterface
685			*/
686			private function cachePool()
687			{
688			return $this->cachePool;
689			}
690			}
691

locomotivemtl / charcoal-core

MetadataLoader::load() B last analyzed 2019-10-30 23:55 UTC

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MetadataLoader::load() B
last analyzed 2019-10-30 23:55 UTC