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Current File : /home/akhalid/omerys/public_html/system/library/template/Twig/Template.php
<?php

/*
 * This file is part of Twig.
 *
 * (c) 2009 Fabien Potencier
 * (c) 2009 Armin Ronacher
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Default base class for compiled templates.
 *
 * @author Fabien Potencier <[email protected]>
 */
abstract class Twig_Template implements Twig_TemplateInterface
{
    protected static $cache = array();

    protected $parent;
    protected $parents = array();
    protected $env;
    protected $blocks = array();
    protected $traits = array();

    /**
     * Constructor.
     *
     * @param Twig_Environment $env A Twig_Environment instance
     */
    public function __construct(Twig_Environment $env)
    {
        $this->env = $env;
    }

    /**
     * Returns the template name.
     *
     * @return string The template name
     */
    abstract public function getTemplateName();

    /**
     * @deprecated since 1.20 (to be removed in 2.0)
     */
    public function getEnvironment()
    {
        @trigger_error('The '.__METHOD__.' method is deprecated since version 1.20 and will be removed in 2.0.', E_USER_DEPRECATED);

        return $this->env;
    }

    /**
     * Returns the parent template.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param array $context
     *
     * @return Twig_TemplateInterface|false The parent template or false if there is no parent
     *
     * @internal
     */
    public function getParent(array $context)
    {
        if (null !== $this->parent) {
            return $this->parent;
        }

        try {
            $parent = $this->doGetParent($context);

            if (false === $parent) {
                return false;
            }

            if ($parent instanceof self) {
                return $this->parents[$parent->getTemplateName()] = $parent;
            }

            if (!isset($this->parents[$parent])) {
                $this->parents[$parent] = $this->loadTemplate($parent);
            }
        } catch (Twig_Error_Loader $e) {
            $e->setTemplateFile(null);
            $e->guess();

            throw $e;
        }

        return $this->parents[$parent];
    }

    protected function doGetParent(array $context)
    {
        return false;
    }

    public function isTraitable()
    {
        return true;
    }

    /**
     * Displays a parent block.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param string $name    The block name to display from the parent
     * @param array  $context The context
     * @param array  $blocks  The current set of blocks
     *
     * @internal
     */
    public function displayParentBlock($name, array $context, array $blocks = array())
    {
        $name = (string) $name;

        if (isset($this->traits[$name])) {
            $this->traits[$name][0]->displayBlock($name, $context, $blocks, false);
        } elseif (false !== $parent = $this->getParent($context)) {
            $parent->displayBlock($name, $context, $blocks, false);
        } else {
            throw new Twig_Error_Runtime(sprintf('The template has no parent and no traits defining the "%s" block', $name), -1, $this->getTemplateName());
        }
    }

    /**
     * Displays a block.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param string $name      The block name to display
     * @param array  $context   The context
     * @param array  $blocks    The current set of blocks
     * @param bool   $useBlocks Whether to use the current set of blocks
     *
     * @internal
     */
    public function displayBlock($name, array $context, array $blocks = array(), $useBlocks = true)
    {
        $name = (string) $name;

        if ($useBlocks && isset($blocks[$name])) {
            $template = $blocks[$name][0];
            $block = $blocks[$name][1];
        } elseif (isset($this->blocks[$name])) {
            $template = $this->blocks[$name][0];
            $block = $this->blocks[$name][1];
        } else {
            $template = null;
            $block = null;
        }

        if (null !== $template) {
            // avoid RCEs when sandbox is enabled
            if (!$template instanceof self) {
                throw new LogicException('A block must be a method on a Twig_Template instance.');
            }

            try {
                $template->$block($context, $blocks);
            } catch (Twig_Error $e) {
                if (!$e->getTemplateFile()) {
                    $e->setTemplateFile($template->getTemplateName());
                }

                // this is mostly useful for Twig_Error_Loader exceptions
                // see Twig_Error_Loader
                if (false === $e->getTemplateLine()) {
                    $e->setTemplateLine(-1);
                    $e->guess();
                }

                throw $e;
            } catch (Exception $e) {
                throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $template->getTemplateName(), $e);
            }
        } elseif (false !== $parent = $this->getParent($context)) {
            $parent->displayBlock($name, $context, array_merge($this->blocks, $blocks), false);
        }
    }

    /**
     * Renders a parent block.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param string $name    The block name to render from the parent
     * @param array  $context The context
     * @param array  $blocks  The current set of blocks
     *
     * @return string The rendered block
     *
     * @internal
     */
    public function renderParentBlock($name, array $context, array $blocks = array())
    {
        ob_start();
        $this->displayParentBlock($name, $context, $blocks);

        return ob_get_clean();
    }

    /**
     * Renders a block.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @param string $name      The block name to render
     * @param array  $context   The context
     * @param array  $blocks    The current set of blocks
     * @param bool   $useBlocks Whether to use the current set of blocks
     *
     * @return string The rendered block
     *
     * @internal
     */
    public function renderBlock($name, array $context, array $blocks = array(), $useBlocks = true)
    {
        ob_start();
        $this->displayBlock($name, $context, $blocks, $useBlocks);

        return ob_get_clean();
    }

    /**
     * Returns whether a block exists or not.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * This method does only return blocks defined in the current template
     * or defined in "used" traits.
     *
     * It does not return blocks from parent templates as the parent
     * template name can be dynamic, which is only known based on the
     * current context.
     *
     * @param string $name The block name
     *
     * @return bool true if the block exists, false otherwise
     *
     * @internal
     */
    public function hasBlock($name)
    {
        return isset($this->blocks[(string) $name]);
    }

    /**
     * Returns all block names.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @return array An array of block names
     *
     * @see hasBlock
     *
     * @internal
     */
    public function getBlockNames()
    {
        return array_keys($this->blocks);
    }

    protected function loadTemplate($template, $templateName = null, $line = null, $index = null)
    {
        try {
            if (is_array($template)) {
                return $this->env->resolveTemplate($template);
            }

            if ($template instanceof self) {
                return $template;
            }

            return $this->env->loadTemplate($template, $index);
        } catch (Twig_Error $e) {
            if (!$e->getTemplateFile()) {
                $e->setTemplateFile($templateName ? $templateName : $this->getTemplateName());
            }

            if ($e->getTemplateLine()) {
                throw $e;
            }

            if (!$line) {
                $e->guess();
            } else {
                $e->setTemplateLine($line);
            }

            throw $e;
        }
    }

    /**
     * Returns all blocks.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * @return array An array of blocks
     *
     * @see hasBlock
     *
     * @internal
     */
    public function getBlocks()
    {
        return $this->blocks;
    }

    /**
     * Returns the template source code.
     *
     * @return string|null The template source code or null if it is not available
     */
    public function getSource()
    {
        $reflector = new ReflectionClass($this);
        $file = $reflector->getFileName();

        if (!file_exists($file)) {
            return;
        }

        $source = file($file, FILE_IGNORE_NEW_LINES);
        array_splice($source, 0, $reflector->getEndLine());

        $i = 0;
        while (isset($source[$i]) && '/* */' === substr_replace($source[$i], '', 3, -2)) {
            $source[$i] = str_replace('*//* ', '*/', substr($source[$i], 3, -2));
            ++$i;
        }
        array_splice($source, $i);

        return implode("\n", $source);
    }

    /**
     * {@inheritdoc}
     */
    public function display(array $context, array $blocks = array())
    {
        $this->displayWithErrorHandling($this->env->mergeGlobals($context), array_merge($this->blocks, $blocks));
    }

    /**
     * {@inheritdoc}
     */
    public function render(array $context)
    {
        $level = ob_get_level();
        ob_start();
        try {
            $this->display($context);
        } catch (Exception $e) {
            while (ob_get_level() > $level) {
                ob_end_clean();
            }

            throw $e;
        } catch (Throwable $e) {
            while (ob_get_level() > $level) {
                ob_end_clean();
            }

            throw $e;
        }

        return ob_get_clean();
    }

    protected function displayWithErrorHandling(array $context, array $blocks = array())
    {
        try {
            $this->doDisplay($context, $blocks);
        } catch (Twig_Error $e) {
            if (!$e->getTemplateFile()) {
                $e->setTemplateFile($this->getTemplateName());
            }

            // this is mostly useful for Twig_Error_Loader exceptions
            // see Twig_Error_Loader
            if (false === $e->getTemplateLine()) {
                $e->setTemplateLine(-1);
                $e->guess();
            }

            throw $e;
        } catch (Exception $e) {
            throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $this->getTemplateName(), $e);
        }
    }

    /**
     * Auto-generated method to display the template with the given context.
     *
     * @param array $context An array of parameters to pass to the template
     * @param array $blocks  An array of blocks to pass to the template
     */
    abstract protected function doDisplay(array $context, array $blocks = array());

    /**
     * Returns a variable from the context.
     *
     * This method is for internal use only and should never be called
     * directly.
     *
     * This method should not be overridden in a sub-class as this is an
     * implementation detail that has been introduced to optimize variable
     * access for versions of PHP before 5.4. This is not a way to override
     * the way to get a variable value.
     *
     * @param array  $context           The context
     * @param string $item              The variable to return from the context
     * @param bool   $ignoreStrictCheck Whether to ignore the strict variable check or not
     *
     * @return mixed The content of the context variable
     *
     * @throws Twig_Error_Runtime if the variable does not exist and Twig is running in strict mode
     *
     * @internal
     */
    final protected function getContext($context, $item, $ignoreStrictCheck = false)
    {
        if (!array_key_exists($item, $context)) {
            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
                return;
            }

            throw new Twig_Error_Runtime(sprintf('Variable "%s" does not exist', $item), -1, $this->getTemplateName());
        }

        return $context[$item];
    }

    /**
     * Returns the attribute value for a given array/object.
     *
     * @param mixed  $object            The object or array from where to get the item
     * @param mixed  $item              The item to get from the array or object
     * @param array  $arguments         An array of arguments to pass if the item is an object method
     * @param string $type              The type of attribute (@see Twig_Template constants)
     * @param bool   $isDefinedTest     Whether this is only a defined check
     * @param bool   $ignoreStrictCheck Whether to ignore the strict attribute check or not
     *
     * @return mixed The attribute value, or a Boolean when $isDefinedTest is true, or null when the attribute is not set and $ignoreStrictCheck is true
     *
     * @throws Twig_Error_Runtime if the attribute does not exist and Twig is running in strict mode and $isDefinedTest is false
     */
    protected function getAttribute($object, $item, array $arguments = array(), $type = self::ANY_CALL, $isDefinedTest = false, $ignoreStrictCheck = false)
    {
        // array
        if (self::METHOD_CALL !== $type) {
            $arrayItem = is_bool($item) || is_float($item) ? (int) $item : $item;

            if ((is_array($object) && array_key_exists($arrayItem, $object))
                || ($object instanceof ArrayAccess && isset($object[$arrayItem]))
            ) {
                if ($isDefinedTest) {
                    return true;
                }

                return $object[$arrayItem];
            }

            if (self::ARRAY_CALL === $type || !is_object($object)) {
                if ($isDefinedTest) {
                    return false;
                }

                if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
                    return;
                }

                if ($object instanceof ArrayAccess) {
                    $message = sprintf('Key "%s" in object with ArrayAccess of class "%s" does not exist', $arrayItem, get_class($object));
                } elseif (is_object($object)) {
                    $message = sprintf('Impossible to access a key "%s" on an object of class "%s" that does not implement ArrayAccess interface', $item, get_class($object));
                } elseif (is_array($object)) {
                    if (empty($object)) {
                        $message = sprintf('Key "%s" does not exist as the array is empty', $arrayItem);
                    } else {
                        $message = sprintf('Key "%s" for array with keys "%s" does not exist', $arrayItem, implode(', ', array_keys($object)));
                    }
                } elseif (self::ARRAY_CALL === $type) {
                    if (null === $object) {
                        $message = sprintf('Impossible to access a key ("%s") on a null variable', $item);
                    } else {
                        $message = sprintf('Impossible to access a key ("%s") on a %s variable ("%s")', $item, gettype($object), $object);
                    }
                } elseif (null === $object) {
                    $message = sprintf('Impossible to access an attribute ("%s") on a null variable', $item);
                } else {
                    $message = sprintf('Impossible to access an attribute ("%s") on a %s variable ("%s")', $item, gettype($object), $object);
                }

                throw new Twig_Error_Runtime($message, -1, $this->getTemplateName());
            }
        }

        if (!is_object($object)) {
            if ($isDefinedTest) {
                return false;
            }

            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
                return;
            }

            if (null === $object) {
                $message = sprintf('Impossible to invoke a method ("%s") on a null variable', $item);
            } else {
                $message = sprintf('Impossible to invoke a method ("%s") on a %s variable ("%s")', $item, gettype($object), $object);
            }

            throw new Twig_Error_Runtime($message, -1, $this->getTemplateName());
        }

        // object property
        if (self::METHOD_CALL !== $type && !$object instanceof self) { // Twig_Template does not have public properties, and we don't want to allow access to internal ones
            if (isset($object->$item) || array_key_exists((string) $item, $object)) {
                if ($isDefinedTest) {
                    return true;
                }

                if ($this->env->hasExtension('sandbox')) {
                    $this->env->getExtension('sandbox')->checkPropertyAllowed($object, $item);
                }

                return $object->$item;
            }
        }

        $class = get_class($object);

        // object method
        if (!isset(self::$cache[$class]['methods'])) {
            // get_class_methods returns all methods accessible in the scope, but we only want public ones to be accessible in templates
            if ($object instanceof self) {
                $ref = new ReflectionClass($class);
                $methods = array();

                foreach ($ref->getMethods(ReflectionMethod::IS_PUBLIC) as $refMethod) {
                    $methodName = strtolower($refMethod->name);

                    // Accessing the environment from templates is forbidden to prevent untrusted changes to the environment
                    if ('getenvironment' !== $methodName) {
                        $methods[$methodName] = true;
                    }
                }

                self::$cache[$class]['methods'] = $methods;
            } else {
                self::$cache[$class]['methods'] = array_change_key_case(array_flip(get_class_methods($object)));
            }
        }

        $call = false;
        $lcItem = strtolower($item);
        if (isset(self::$cache[$class]['methods'][$lcItem])) {
            $method = (string) $item;
        } elseif (isset(self::$cache[$class]['methods']['get'.$lcItem])) {
            $method = 'get'.$item;
        } elseif (isset(self::$cache[$class]['methods']['is'.$lcItem])) {
            $method = 'is'.$item;
        } elseif (isset(self::$cache[$class]['methods']['__call'])) {
            $method = (string) $item;
            $call = true;
        } else {
            if ($isDefinedTest) {
                return false;
            }

            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
                return;
            }

            throw new Twig_Error_Runtime(sprintf('Neither the property "%1$s" nor one of the methods "%1$s()", "get%1$s()"/"is%1$s()" or "__call()" exist and have public access in class "%2$s"', $item, get_class($object)), -1, $this->getTemplateName());
        }

        if ($isDefinedTest) {
            return true;
        }

        if ($this->env->hasExtension('sandbox')) {
            $this->env->getExtension('sandbox')->checkMethodAllowed($object, $method);
        }

        // Some objects throw exceptions when they have __call, and the method we try
        // to call is not supported. If ignoreStrictCheck is true, we should return null.
        try {
            $ret = call_user_func_array(array($object, $method), $arguments);
        } catch (BadMethodCallException $e) {
            if ($call && ($ignoreStrictCheck || !$this->env->isStrictVariables())) {
                return;
            }
            throw $e;
        }

        // useful when calling a template method from a template
        // this is not supported but unfortunately heavily used in the Symfony profiler
        if ($object instanceof Twig_TemplateInterface) {
            return $ret === '' ? '' : new Twig_Markup($ret, $this->env->getCharset());
        }

        return $ret;
    }
}

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