<?php

/*
 * This file is part of Phraseanet
 *
 * (c) 2005-2014 Alchemy
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Alchemy\Phrasea\Setup;

/**
 * @see https://github.com/sensio/SensioDistributionBundle/blob/master/Resources/skeleton/app/SymfonyRequirements.php
 *
 * A RequirementCollection represents a set of Requirement instances.
 *
 * @author Tobias Schultze <http://tobion.de>
 */
interface RequirementCollectionInterface extends \IteratorAggregate
{
    /**
     * Get the name of the requirement collection
     *
     * @return String
     */
    public function getName();

    /**
     * Set a name to the requirement collection
     *
     * @param String $name
     *
     * @return RequirementCollectionInterface
     */
    public function setName($name);

    public function addInformation($name, $value);

    public function getInformations();

    /**
     * Adds a RequirementInterface.
     *
     * @param Requirement $requirement A Requirement instance
     */
    public function add(RequirementInterface $requirement);

    /**
     * Adds a mandatory requirement.
     *
     * @param Boolean     $fulfilled   Whether the requirement is fulfilled
     * @param string      $testMessage The message for testing the requirement
     * @param string      $helpHtml    The help text formatted in HTML for resolving the problem
     * @param string|null $helpText    The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
     */
    public function addRequirement($fulfilled, $testMessage, $helpHtml, $helpText = null);

    /**
     * Adds an optional recommendation.
     *
     * @param Boolean     $fulfilled   Whether the recommendation is fulfilled
     * @param string      $testMessage The message for testing the recommendation
     * @param string      $helpHtml    The help text formatted in HTML for resolving the problem
     * @param string|null $helpText    The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
     */
    public function addRecommendation($fulfilled, $testMessage, $helpHtml, $helpText = null);

    /**
     * Adds a mandatory requirement in form of a php.ini configuration.
     *
     * @param string           $cfgName    The configuration name used for ini_get()
     * @param Boolean|callback $evaluation Either a Boolean indicating whether the configuration should evaluate to true or false,
                                                    or a callback function receiving the configuration value as parameter to determine the fulfillment of the requirement
     * @param Boolean $approveCfgAbsence If true the Requirement will be fulfilled even if the configuration option does not exist, i.e. ini_get() returns false.
                                                    This is helpful for abandoned configs in later PHP versions or configs of an optional extension, like Suhosin.
                                                    Example: You require a config to be true but PHP later removes this config and defaults it to true internally.
     * @param string      $testMessage The message for testing the requirement (when null and $evaluation is a Boolean a default message is derived)
     * @param string      $helpHtml    The help text formatted in HTML for resolving the problem (when null and $evaluation is a Boolean a default help is derived)
     * @param string|null $helpText    The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
     */
    public function addPhpIniRequirement($cfgName, $evaluation, $approveCfgAbsence = false, $testMessage = null, $helpHtml = null, $helpText = null);

    /**
     * Adds an optional recommendation in form of a php.ini configuration.
     *
     * @param string           $cfgName    The configuration name used for ini_get()
     * @param Boolean|callback $evaluation Either a Boolean indicating whether the configuration should evaluate to true or false,
                                                    or a callback function receiving the configuration value as parameter to determine the fulfillment of the requirement
     * @param Boolean $approveCfgAbsence If true the Requirement will be fulfilled even if the configuration option does not exist, i.e. ini_get() returns false.
                                                    This is helpful for abandoned configs in later PHP versions or configs of an optional extension, like Suhosin.
                                                    Example: You require a config to be true but PHP later removes this config and defaults it to true internally.
     * @param string      $testMessage The message for testing the requirement (when null and $evaluation is a Boolean a default message is derived)
     * @param string      $helpHtml    The help text formatted in HTML for resolving the problem (when null and $evaluation is a Boolean a default help is derived)
     * @param string|null $helpText    The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
     */
    public function addPhpIniRecommendation($cfgName, $evaluation, $approveCfgAbsence = false, $testMessage = null, $helpHtml = null, $helpText = null);

    /**
     * Adds a requirement collection to the current set of requirements.
     *
     * @param RequirementCollection $collection A RequirementCollection instance
     */
    public function addCollection(RequirementCollection $collection);

    /**
     * Returns both requirements and recommendations.
     *
     * @return array Array of Requirement instances
     */
    public function all();

    /**
     * Returns all mandatory requirements.
     *
     * @return RequirementInterface[] Array of Requirement instances
     */
    public function getRequirements();

    /**
     * Returns the mandatory requirements that were not met.
     *
     * @return array Array of Requirement instances
     */
    public function getFailedRequirements();

    /**
     * Returns all optional recommmendations.
     *
     * @return array Array of Requirement instances
     */
    public function getRecommendations();

    /**
     * Returns the recommendations that were not met.
     *
     * @return array Array of Requirement instances
     */
    public function getFailedRecommendations();

    /**
     * Returns whether a php.ini configuration is not correct.
     *
     * @return Boolean php.ini configuration problem?
     */
    public function hasPhpIniConfigIssue();

    /**
     * Returns the PHP configuration file (php.ini) path.
     *
     * @return string|false php.ini file path
     */
    public function getPhpIniConfigPath();
}