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<?php

/**
 * MvcCore
 *
 * This source file is subject to the BSD 3 License
 * For the full copyright and license information, please view
 * the LICENSE.md file that are distributed with this source code.
 *
 * @copyright   Copyright (c) 2016 Tom Flidr (https://github.com/mvccore)
 * @license  https://mvccore.github.io/docs/mvccore/5.0.0/LICENCE.md
 */

namespace MvcCore\View;

trait MagicMethods {

    /**
     * @inheritDocs
     * @param string $name
     * @param mixed $value
     * @return bool
     */
    public function __set ($name, $value) {
        /** @var $this \MvcCore\View */
        return $this->__protected['store'][$name] = & $value;
    }

    /**
     * @inheritDocs
     * @param string $name
     * @return mixed
     */
    public function __get ($name) {
        /** @var $this \MvcCore\View */
        $store = & $this->__protected['store'];
        // if property is in view store - return it
        if (array_key_exists($name, $store))
            return $store[$name];
        // if property is not in view store - try to get it from controller and set it into local view store
        if ($controllerType = $this->getReflectionClass('controller')) {
            if ($controllerType->hasProperty($name)) {
                /** @var $property \ReflectionProperty */
                $property = $controllerType->getProperty($name);
                if (!$property->isStatic()) {
                    if (!$property->isPublic())
                        $property->setAccessible(TRUE); // protected or private
                    $value = NULL;
                    if (PHP_VERSION_ID >= 70400 && $property->hasType()) {
                        if ($property->isInitialized($this->controller))
                            $value = $property->getValue($this->controller);
                    } else {
                        $value = $property->getValue($this->controller);
                    }
                    $store[$name] = & $value;
                    return $value;
                }
            }
        }
        // return null, if property is not in local store an even not in controller
        return NULL;
    }

    /**
     * @inheritDocs
     * @param string $name
     * @return bool
     */
    public function __isset ($name) {
        /** @var $this \MvcCore\View */
        $store = & $this->__protected['store'];
        // if property is in view store - return it
        if (array_key_exists($name, $store)) 
            return $store[$name] !== NULL;
        // if property is not in view store - try to get it from controller and set it into local view store
        if ($controllerType = $this->getReflectionClass('controller')) {
            if ($controllerType->hasProperty($name)) {
                /** @var $property \ReflectionProperty */
                $property = $controllerType->getProperty($name);
                if (!$property->isStatic()) {
                    if (!$property->isPublic())
                        $property->setAccessible(TRUE); // protected or private
                    $value = NULL;
                    if (PHP_VERSION_ID >= 70400 && $property->hasType()) {
                        if ($property->isInitialized($this->controller))
                            $value = $property->getValue($this->controller);
                    } else {
                        $value = $property->getValue($this->controller);
                    }
                    $store[$name] = & $value;
                    return $value !== NULL;
                }
            }
        }
        // property is not in local store and even in controller instance, return `FALSE`
        return FALSE;
    }

    /**
     * @inheritDocs
     * @param string $name
     * @return void
     */
    public function __unset ($name) {
        /** @var $this \MvcCore\View */
        $store = & $this->__protected['store'];
        if (array_key_exists($name, $store)) 
            unset($store[$name]);
    }

    /**
     * Get cached reflection class instance about given name from current `$this` context.
     * If given name doesn't exists in local context, return `NULL`.
     * @param string $currentContextObjectName Local context property name to get reflection class about.
     * @return \ReflectionClass|NULL
     */
    protected function getReflectionClass ($currentContextObjectName) {
        /** @var $this \MvcCore\View */
        $privates = & $this->__protected;

        $reflectionTypes = & $privates['reflectionTypes'];
        if (isset($reflectionTypes[$currentContextObjectName])) {
            return $reflectionTypes[$currentContextObjectName];
        }
        // prevent infinite loop
        if ($privates['reflectionName'] === $currentContextObjectName) {
            $privates['reflectionName'] = NULL;
            return NULL;
        }
        $privates['reflectionName'] = $currentContextObjectName;
        $currentContextObject = $this->{$currentContextObjectName};
        if ($currentContextObject !== NULL) {
            $reflectionType = new \ReflectionClass($currentContextObject);
            $reflectionTypes[$currentContextObjectName] = & $reflectionType;
            return $reflectionType;
        }
        $privates['reflectionName'] = NULL;
        return NULL;
    }
}