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<?php |
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namespace HexMakina\LeMarchand; |
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use Psr\Container\ContainerInterface; |
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class Solver |
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{ |
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public const RX_SETTINGS = '/^settings\./'; |
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public const RX_INTERFACE = '/([a-zA-Z]+)Interface$/'; |
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public const RX_MVC = '/(Models|Controllers)\\\([a-zA-Z\\\]+)(::class|::new)?$/'; |
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private static array $cascade_cache = []; |
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private ContainerInterface $container; |
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private Factory $factory; |
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public function __construct(ContainerInterface $c) |
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{ |
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$this->container = $c; |
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$this->factory = new Factory($this->container); |
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} |
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public function solve(string $lamentation) |
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{ |
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return $this->probeSettings ($lamentation) |
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?? $this->probeClasses ($lamentation) |
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?? $this->probeInterface($lamentation) |
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?? $this->probeCascade ($lamentation); |
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} |
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//dot based hierarchy, parse and climb |
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public function probeSettings(string $lamentation) |
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{ |
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if (!self::isSettings($lamentation)) { |
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return null; |
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} |
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$settings = $this->container->get('settings') ?? []; |
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$path = explode('.', $lamentation); |
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array_shift($path); // remove 'settings' from the path |
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$walked = []; |
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foreach ($path as $k) { |
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$walked []= $k; |
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if (isset($settings[$k])) { |
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$settings = $settings[$k]; |
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continue; |
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} |
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// we didn't continue; we failed |
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$walked = 'settings.' . implode('.', $walked); |
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throw new NotFoundException(__FUNCTION__."($lamentation) failed at $walked"); |
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} |
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return $settings; |
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} |
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public function probeClasses(string $className, array $construction_args = []): ?object |
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{ |
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if(class_exists($className)) |
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return $this->factory->serve($className, $construction_args); |
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return null; |
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} |
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public function probeInterface(string $lamentation): ?object |
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{ |
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if (!self::isInterface($lamentation)) { |
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return null; |
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} |
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$wires = $this->container->get('wiring') ?? []; |
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if (!isset($wires[$lamentation])) |
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throw new NotFoundException(__FUNCTION__."($lamentation) is not wired to a class"); |
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$wire = $wires[$lamentation]; |
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// interface + constructor params |
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if (is_array($wire)) { // hasEmbeddedConstructorParameters, [0] is class, then args |
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$class = array_shift($wire); |
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$args = $wire; |
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} else { // simple instantiation |
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$class = $wire; |
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$args = null; |
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} |
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return $this->factory->serve($class, $args); |
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} |
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public function probeCascade(string $lamentation) |
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{ |
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$ret = null; |
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$m = []; |
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if (preg_match(self::RX_MVC, $lamentation, $m) !== 1) { |
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return null; |
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} |
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$class_name = $m[1] . '\\' . $m[2]; |
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$class_name = $this->cascadeNamespace($class_name); |
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if(is_null($class_name)) |
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$ret = null; |
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elseif (self::hasClassNameModifier($lamentation)) { |
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$ret = $class_name; |
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} elseif (self::hasNewInstanceModifier($lamentation)) { |
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$ret = $this->factory->build($class_name, []); |
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} else { |
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$ret = $this->factory->serve($class_name, []); |
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} |
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return $ret; |
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} |
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private function cascadeNamespace(string $class_name): ?string |
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{ |
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// is it cached ? |
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if (isset(self::$cascade_cache[$class_name])) { |
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return self::$cascade_cache[$class_name]; |
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} |
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// no cache lets cascade |
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$cascade = $this->container->get('cascade') ?? []; |
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foreach ($cascade as $namespace) { |
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$fully_namespaced = $namespace . $class_name; |
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if (class_exists($fully_namespaced)) { |
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self::$cascade_cache[$class_name] = $fully_namespaced; |
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return $fully_namespaced; |
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} |
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} |
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return null; |
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} |
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private static function isSettings($lamentation): bool |
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{ |
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return preg_match(self::RX_SETTINGS, $lamentation) === 1; |
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} |
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private static function isInterface($lamentation): bool |
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{ |
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return preg_match(self::RX_INTERFACE, $lamentation) === 1; |
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} |
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private static function hasClassNameModifier($lamentation) |
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{ |
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return strpos($lamentation, '::class') !== false; |
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} |
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private static function hasNewInstanceModifier($lamentation) |
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{ |
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return strpos($lamentation, '::new') !== false; |
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} |
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} |