<?php
    /*********************************************************************************
     * Zurmo is a customer relationship management program developed by
     * Zurmo, Inc. Copyright (C) 2017 Zurmo Inc.
     *
     * Zurmo is free software; you can redistribute it and/or modify it under
     * the terms of the GNU Affero General Public License version 3 as published by the
     * Free Software Foundation with the addition of the following permission added
     * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
     * IN WHICH THE COPYRIGHT IS OWNED BY ZURMO, ZURMO DISCLAIMS THE WARRANTY
     * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
     *
     * Zurmo is distributed in the hope that it will be useful, but WITHOUT
     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
     * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
     * details.
     *
     * You should have received a copy of the GNU Affero General Public License along with
     * this program; if not, see http://www.gnu.org/licenses or write to the Free
     * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
     * 02110-1301 USA.
     *
     * You can contact Zurmo, Inc. with a mailing address at 27 North Wacker Drive
     * Suite 370 Chicago, IL 60606. or at email address contact@zurmo.com.
     *
     * The interactive user interfaces in original and modified versions
     * of this program must display Appropriate Legal Notices, as required under
     * Section 5 of the GNU Affero General Public License version 3.
     *
     * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
     * these Appropriate Legal Notices must retain the display of the Zurmo
     * logo and Zurmo copyright notice. If the display of the logo is not reasonably
     * feasible for technical reasons, the Appropriate Legal Notices must display the words
     * "Copyright Zurmo Inc. 2017. All rights reserved".
     ********************************************************************************/

    /**
     * Checks that Apache or IIS is installed with the minimum version.
     */
    class WebServerServiceHelper extends ServiceHelper
    {
        protected $minimumVersion = array('microsoft-iis' => '5.0.0', 'apache' => '2.2.1');

        protected function checkService()
        {
            // @ for when accessing this through tests
            $serverName = @$_SERVER['SERVER_SOFTWARE'];
            if (strrpos($serverName, 'Apache') !== false && strrpos($serverName, 'Apache') >= 0)
            {
                return $this->checkServiceAndSetMessagesByMethodNameAndDisplayLabel('checkWebServer', Zurmo::t('InstallModule', 'Apache'));
            }
            elseif (strrpos($serverName, 'Microsoft-IIS') !== false && strrpos($serverName, 'Microsoft-IIS') >= 0)
            {
                return $this->checkServiceAndSetMessagesByMethodNameAndDisplayLabel('checkWebServer', Zurmo::t('InstallModule', 'Microsoft-IIS'));
            }
            else
            {
                $this->message  = Zurmo::t('InstallModule', 'Zurmo runs only on Apache {apacheMinVersion} and higher or Microsoft-IIS {iisMinVersion} or higher web servers.',
                        array(
                              '{apacheMinVersion}' => $this->minimumVersion['apache'],
                              '{iisMinVersion}'    => $this->minimumVersion['microsoft-iis'])
                        );
                return false;
            }
        }

        /**
         * Override to handle scenarios where the application can detect apache is installed, but is unable to resolve
         * the version.
         * @see ServiceHelper::checkServiceAndSetMessagesByMethodNameAndDisplayLabel()
         * @param string $methodName
         * @param string $displayLabel
         * @return bool
         */
        protected function checkServiceAndSetMessagesByMethodNameAndDisplayLabel($methodName, $displayLabel)
        {
            assert('$this->minimumVersion != null &&
                    (is_array($this->minimumVersion) || is_string($this->minimumVersion))');
            assert('is_string($methodName)');
            assert('is_string($displayLabel)');
            $actualVersion           = null;
            $minimumVersionLabel     = $this->getMinimumVersionLabel();
            $passed                  = $this->callCheckServiceMethod($methodName, $actualVersion);
            if ($passed)
            {
                $this->message  = $displayLabel . ' ' . Zurmo::t('InstallModule', 'version installed:') . ' ' . $actualVersion;
                $this->message .= ' ' .Zurmo::t('InstallModule', 'Minimum version required:') . ' ' . $minimumVersionLabel;
                return true;
            }
            else
            {
                if ($actualVersion == null)
                {
                    if ($_SERVER['SERVER_SOFTWARE'] == 'Apache')
                    {
                        $this->checkResultedInWarning = true;
                        $this->message  = $displayLabel . ' ' .
                                          Zurmo::t('InstallModule', 'is installed, but the version is unknown.');
                    }
                    else
                    {
                        $this->message  = $displayLabel . ' ' . Zurmo::t('InstallModule', 'is not installed.');
                    }
                }
                else
                {
                    $this->message  = $displayLabel . ' ' . Zurmo::t('InstallModule', 'version installed:') . ' ' . $actualVersion;
                }
                $this->message .= "\n";
                $this->message .= Zurmo::t('InstallModule', 'Minimum version required:') . ' ' . $minimumVersionLabel;
                return false;
            }
        }

        protected function getMinimumVersionLabel()
        {
            assert('is_array($this->minimumVersion)');
            $serverName = $_SERVER['SERVER_SOFTWARE'];
            if (strrpos($serverName, 'Microsoft-IIS') !== false && strrpos($serverName, 'Microsoft-IIS') >= 0)
            {
                return $this->minimumVersion['microsoft-iis'];
            }
            elseif (strrpos($serverName, 'Apache') !== false && strrpos($serverName, 'Apache') >= 0)
            {
                return $this->minimumVersion['apache'];
            }
        }
    }
?>