Namespaces

• ICanBoogie
  • Render
    • EngineCollection
    • Renderer
    • TemplateResolver

Classes

• BasicTemplateResolver
• EngineCollection
• EngineNotAvailable
• EngineNotDefined
• PHPEngine
• Renderer
• TemplateName

Interfaces

• Engine
• Exception
• TemplateResolver

Traits

• TemplateResolverTrait

Exceptions

• TemplateNotFound

Functions

• get_engines
• get_renderer
• get_template_resolver

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<?php

/*
 * This file is part of the ICanBoogie package.
 *
 * (c) Olivier Laviale <olivier.laviale@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ICanBoogie\Render;

use ICanBoogie\Accessor\AccessorTrait;

/**
 * An engine collection.
 *
 * @package ICanBoogie\Render
 *
 * @property-read array $extensions The extensions supported by the engines.
 */
class EngineCollection implements \ArrayAccess, \IteratorAggregate
{
    use AccessorTrait;

    private $engines;

    /**
     * @return array
     */
    protected function get_extensions()
    {
        return array_keys($this->engines);
    }

    private $instances;

    public function __construct(array $engines=[])
    {
        foreach ($engines as $extension => $engine)
        {
            $this[$extension] = $engine;
        }
    }

    /**
     * @inheritdoc
     */
    public function offsetExists($extension)
    {
        return isset($this->engines[$extension]);
    }

    /**
     * @inheritdoc
     */
    public function offsetGet($extension)
    {
        if (!$this->offsetExists($extension))
        {
            throw new EngineNotDefined([ $extension, $this ]);
        }

        if (empty($this->instances[$extension]))
        {
            $instance = $this->engines[$extension];

            if (is_string($instance))
            {
                $instance = new $instance;
            }

            $this->instances[$extension] = $instance;
        }

        return $this->instances[$extension];
    }

    /**
     * @inheritdoc
     */
    public function offsetSet($extension, $engine)
    {
        $this->engines[$extension] = $engine;
    }

    /**
     * @inheritdoc
     */
    public function offsetUnset($extension)
    {
        unset($this->engines[$extension]);
    }

    /**
     * @inheritdoc
     */
    public function getIterator()
    {
        return new \ArrayIterator($this->engines);
    }

    /**
     * Resolves the engine to use from the specified pathname.
     *
     * @param $pathname
     *
     * @return Engine|bool An engine or `false` if none matches the extension.
     */
    public function resolve_engine($pathname)
    {
        $extension = pathinfo($pathname, PATHINFO_EXTENSION);

        if (!$extension)
        {
            return false;
        }

        $extension = "." . $extension;

        if (!isset($this[$extension]))
        {
            return false;
        }

        return $this[$extension];
    }

    /**
     * Renders a template with the specified variables.
     *
     * @param string $template_pathname The pathname of the template.
     * @param mixed $thisArg The subject of the rendering.
     * @param array $variables
     * @param array $options
     *
     * @return string
     *
     * @throws EngineNotAvailable when there is no engine available to render the template.
     */
    public function render($template_pathname, $thisArg, $variables, array $options=[])
    {
        $engine = $this->resolve_engine($template_pathname);

        if (!$engine)
        {
            throw new EngineNotAvailable("There is no engine available to render template $template_pathname.");
        }

        return $engine->render($template_pathname, $thisArg, $variables, $options);
    }
}