<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Symfony\Component\DependencyInjection\Dumper;

use Symfony\Component\Yaml\Yaml;

use Symfony\Component\DependencyInjection\ContainerInterface;

use Symfony\Component\DependencyInjection\Parameter;

use Symfony\Component\DependencyInjection\Reference;

/**

 * YamlDumper dumps a service container as a YAML string.

 *

 * @author Fabien Potencier <fabien@symfony.com>

 *

 * @api

 */

class YamlDumper extends Dumper

{

    /**

     * Dumps the service container as an YAML string.

     *

     * @param  array  $options An array of options

     *

     * @return string A YAML string representing of the service container

     *

     * @api

     */

    public function dump(array $options = array())

    {

        return $this->addParameters()."\n".$this->addServices();

    }

    /**

     * Adds a service

     *

     * @param string $id

     * @param Definition $definition

     * @return string

     */

    private function addService($id, $definition)

    {

        $code = "  $id:\n";

        if ($definition->getClass()) {

            $code .= sprintf("    class: %s\n", $definition->getClass());

        }

        $tagsCode = '';

        foreach ($definition->getTags() as $name => $tags) {

            foreach ($tags as $attributes) {

                $att = array();

                foreach ($attributes as $key => $value) {

                    $att[] = sprintf('%s: %s', Yaml::dump($key), Yaml::dump($value));

                }

                $att = $att ? ', '.implode(' ', $att) : '';

                $tagsCode .= sprintf("      - { name: %s%s }\n", Yaml::dump($name), $att);

            }

        }

        if ($tagsCode) {

            $code .= "    tags:\n".$tagsCode;

        }

        if ($definition->getFile()) {

            $code .= sprintf("    file: %s\n", $definition->getFile());

        }

        if ($definition->getFactoryMethod()) {

            $code .= sprintf("    factory_method: %s\n", $definition->getFactoryMethod());

        }

        if ($definition->getFactoryService()) {

            $code .= sprintf("    factory_service: %s\n", $definition->getFactoryService());

        }

        if ($definition->getArguments()) {

            $code .= sprintf("    arguments: %s\n", Yaml::dump($this->dumpValue($definition->getArguments()), 0));

        }

        if ($definition->getProperties()) {

            $code .= sprintf("    properties: %s\n", Yaml::dump($this->dumpValue($definition->getProperties()), 0));

        }

        if ($definition->getMethodCalls()) {

            $code .= sprintf("    calls:\n      %s\n", str_replace("\n", "\n      ", Yaml::dump($this->dumpValue($definition->getMethodCalls()), 1)));

        }

        if (ContainerInterface::SCOPE_CONTAINER !== $scope = $definition->getScope()) {

            $code .= sprintf("    scope: %s\n", $scope);

        }

        if ($callable = $definition->getConfigurator()) {

            if (is_array($callable)) {

                if (is_object($callable[0]) && $callable[0] instanceof Reference) {

                    $callable = array($this->getServiceCall((string) $callable[0], $callable[0]), $callable[1]);

                } else {

                    $callable = array($callable[0], $callable[1]);

                }

            }

            $code .= sprintf("    configurator: %s\n", Yaml::dump($callable, 0));

        }

        return $code;

    }

    /**

     * Adds a service alias

     *

     * @param string $alias

     * @param string $id

     * @return string

     */

    private function addServiceAlias($alias, $id)

    {

        if ($id->isPublic()) {

            return sprintf("  %s: @%s\n", $alias, $id);

        } else {

            return sprintf("  %s:\n    alias: %s\n    public: false", $alias, $id);

        }

    }

    /**

     * Adds services

     *

     * @return string

     */

    private function addServices()

    {

        if (!$this->container->getDefinitions()) {

            return '';

        }

        $code = "services:\n";

        foreach ($this->container->getDefinitions() as $id => $definition) {

            $code .= $this->addService($id, $definition);

        }

        foreach ($this->container->getAliases() as $alias => $id) {

            $code .= $this->addServiceAlias($alias, $id);

        }

        return $code;

    }

    /**

     * Adds parameters

     *

     * @return string

     */

    private function addParameters()

    {

        if (!$this->container->getParameterBag()->all()) {

            return '';

        }

        if ($this->container->isFrozen()) {

            $parameters = $this->prepareParameters($this->container->getParameterBag()->all());

        } else {

            $parameters = $this->container->getParameterBag()->all();

        }

        return Yaml::dump(array('parameters' => $parameters), 2);

    }

    /**

     * Dumps the value to YAML format

     *

     * @param mixed $value

     * @throws \RuntimeException When trying to dump object or resource

     */

    private function dumpValue($value)

    {

        if (is_array($value)) {

            $code = array();

            foreach ($value as $k => $v) {

                $code[$k] = $this->dumpValue($v);

            }

            return $code;

        } elseif (is_object($value) && $value instanceof Reference) {

            return $this->getServiceCall((string) $value, $value);

        } elseif (is_object($value) && $value instanceof Parameter) {

            return $this->getParameterCall((string) $value);

        } elseif (is_object($value) || is_resource($value)) {

            throw new \RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');

        }

        return $value;

    }

    /**

     * Gets the service call.

     *

     * @param string    $id

     * @param Reference $reference

     * @return string

     */

    private function getServiceCall($id, Reference $reference = null)

    {

        if (null !== $reference && ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE !== $reference->getInvalidBehavior()) {

            return sprintf('@?%s', $id);

        }

        return sprintf('@%s', $id);

    }

    /**

     * Gets parameter call.

     *

     * @param string $id

     * @return string

     */

    private function getParameterCall($id)

    {

        return sprintf('%%%s%%', $id);

    }

    /**

     * Prepares parameters

     *

     * @param array $parameters

     * @return array

     */

    private function prepareParameters($parameters)

    {

        $filtered = array();

        foreach ($parameters as $key => $value) {

            if (is_array($value)) {

                $value = $this->prepareParameters($value);

            } elseif ($value instanceof Reference) {

                $value = '@'.$value;

            }

            $filtered[$key] = $value;

        }

        return $this->escape($filtered);

    }

    /**

     * Escapes arguments

     *

     * @param array $arguments

     * @return array

     */

    private function escape($arguments)

    {

        $args = array();

        foreach ($arguments as $k => $v) {

            if (is_array($v)) {

                $args[$k] = $this->escape($v);

            } elseif (is_string($v)) {

                $args[$k] = str_replace('%', '%%', $v);

            } else {

                $args[$k] = $v;

            }

        }

        return $args;

    }

}