<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Header for the navigation panel
 *
 * @package PhpMyAdmin-Navigation
 */
if (! defined('PHPMYADMIN')) {
    exit;
}

/**
 * This class renders the logo, links, server selection,
 * which are then displayed at the top of the navigation panel
 *
 * @package PhpMyAdmin-Navigation
 */
class PMA_NavigationHeader
{
    /**
     * Renders the navigation
     *
     * @return String HTML
     */
    public function getDisplay()
    {
        if (empty($GLOBALS['url_query'])) {
            $GLOBALS['url_query'] = PMA_URL_getCommon();
        }
        $link_url = PMA_URL_getCommon(
            array(
                'ajax_request' => true
            )
        );
        $class = ' class="list_container';
        if ($GLOBALS['cfg']['NavigationLinkWithMainPanel']) {
            $class .= ' synced';
        }
        if ($GLOBALS['cfg']['NavigationTreePointerEnable']) {
            $class .= ' highlight';
        }
        $class .= '"';
        $buffer  = '<div id="pma_navigation">';
        $buffer .= '<div id="pma_navigation_resizer"></div>';
        $buffer .= '<div id="pma_navigation_collapser"></div>';
        $buffer .= '<div id="pma_navigation_content">';
        $buffer .= '<div id="pma_navigation_header">';
        $buffer .= sprintf(
            '<a class="hide navigation_url" href="navigation.php%s"></a>',
            $link_url
        );
        $buffer .= $this->_logo();
        $buffer .= $this->_links();
        $buffer .= $this->_serverChoice();
        $buffer .= PMA_Util::getImage(
            'ajax_clock_small.gif',
            __('Loading…'),
            array(
                'style' => 'visibility: hidden; display:none',
                'class' => 'throbber'
            )
        );
        $buffer .= '</div>'; // pma_navigation_header
        $buffer .= '<div id="pma_navigation_tree"' . $class . '>';
        return $buffer;
    }

    /**
     * Create the code for displaying the phpMyAdmin
     * logo based on configuration settings
     *
     * @return string HTML code for the logo
     */
    private function _logo()
    {
        $retval = '<!-- LOGO START -->';
        // display Logo, depending on $GLOBALS['cfg']['NavigationDisplayLogo']
        if (!$GLOBALS['cfg']['NavigationDisplayLogo']) {
            $retval .= '<!-- LOGO END -->';
            return $retval;
        }

        $logo = 'phpMyAdmin';
        if (@file_exists($GLOBALS['pmaThemeImage'] . 'logo_left.png')) {
            $logo = '<img src="' . $GLOBALS['pmaThemeImage'] . 'logo_left.png" '
                . 'alt="' . $logo . '" id="imgpmalogo" />';
        } elseif (@file_exists($GLOBALS['pmaThemeImage'] . 'pma_logo2.png')) {
            $logo = '<img src="' . $GLOBALS['pmaThemeImage'] . 'pma_logo2.png" '
                . 'alt="' . $logo . '" id="imgpmalogo" />';
        }
        $retval .= '<div id="pmalogo">';
        if ($GLOBALS['cfg']['NavigationLogoLink']) {
            $logo_link = trim(
                htmlspecialchars($GLOBALS['cfg']['NavigationLogoLink'])
            );
            // prevent XSS, see PMASA-2013-9
            // if link has protocol, allow only http and https
            if (preg_match('/^[a-z]+:/i', $logo_link)
                && ! preg_match('/^https?:/i', $logo_link)
            ) {
                $logo_link = 'index.php';
            }
            $retval .= '    <a href="' . $logo_link;
            switch ($GLOBALS['cfg']['NavigationLogoLinkWindow']) {
            case 'new':
                $retval .= '" target="_blank"';
                break;
            case 'main':
                // do not add our parameters for an external link
                $navLogoLinkLower = /*overload*/mb_strtolower(
                    $GLOBALS['cfg']['NavigationLogoLink']
                );
                if (/*overload*/mb_substr($navLogoLinkLower, 0, 4) !== '://') {
                    $retval .= $GLOBALS['url_query'] . '"';
                } else {
                    $retval .= '" target="_blank"';
                }
            }
            $retval .= '>';
            $retval .= $logo;
            $retval .= '</a>';
        } else {
            $retval .= $logo;
        }
        $retval .= '</div>';

        $retval .= '<!-- LOGO END -->';
        return $retval;
    }

    /**
     * Creates the code for displaying the links
     * at the top of the navigation panel
     *
     * @return string HTML code for the links
     */
    private function _links()
    {
        // always iconic
        $showIcon = true;
        $showText = false;

        $retval  = '<!-- LINKS START -->';
        $retval .= '<div id="navipanellinks">';
        $retval .= PMA_Util::getNavigationLink(
            'index.php' . PMA_URL_getCommon(),
            $showText,
            __('Home'),
            $showIcon,
            'b_home.png'
        );
        // if we have chosen server
        if ($GLOBALS['server'] != 0) {
            // Logout for advanced authentication
            if ($GLOBALS['cfg']['Server']['auth_type'] != 'config') {
                $link  = 'index.php' . $GLOBALS['url_query'];
                $link .= '&amp;old_usr=' . urlencode($GLOBALS['PHP_AUTH_USER']);
                $retval .= PMA_Util::getNavigationLink(
                    $link,
                    $showText,
                    __('Log out'),
                    $showIcon,
                    's_loggoff.png',
                    '',
                    true
                );
            }
        }
        $retval .= PMA_Util::getNavigationLink(
            PMA_Util::getDocuLink('index'),
            $showText,
            __('phpMyAdmin documentation'),
            $showIcon,
            'b_docs.png',
            '',
            false,
            'documentation'
        );
        if ($showIcon) {
            $retval .= PMA_Util::showMySQLDocu('', true);
        }
        if ($showText) {
            // PMA_showMySQLDocu always spits out an icon,
            // we just replace it with some perl regexp.
            $link = preg_replace(
                '/<img[^>]+>/i',
                __('Documentation'),
                PMA_Util::showMySQLDocu('', true)
            );
            $retval .= $link;
            $retval .= '<br />';
        }
        $retval .= PMA_Util::getNavigationLink(
            '#',
            $showText,
            __('Reload navigation panel'),
            $showIcon,
            's_reload.png',
            'pma_navigation_reload'
        );
        $retval .= '</div>';
        $retval .= '<!-- LINKS ENDS -->';
        return $retval;
    }

    /**
     * Displays the MySQL servers choice form
     *
     * @return string HTML code for the MySQL servers choice
     */
    private function _serverChoice()
    {
        $retval = '';
        if ($GLOBALS['cfg']['NavigationDisplayServers']
            && count($GLOBALS['cfg']['Servers']) > 1
        ) {
            include_once './libraries/select_server.lib.php';
            $retval .= '<!-- SERVER CHOICE START -->';
            $retval .= '<div id="serverChoice">';
            $retval .= PMA_selectServer(true, true);
            $retval .= '</div>';
            $retval .= '<!-- SERVER CHOICE END -->';
        }
        return $retval;
    }
}
?>