/************************************************
*                                               *
*             OUTPUT THE TNG PAGE               *
*                                               *
* mbtng_use_tng_homepage                        *
* mbtng_frontend_header                         *
* mbtng_frontend_footer                         *
* mbtng_fake_post                               *
* mbtng_output_page                             *
* mbtng_buffer_start                            *
* mbtng_buffer_end                              *
* mbtng_discard_output                          *
* mbtng_eval_php                                *
************************************************/

function mbtng_use_tng_homepage() {
    if (get_option('mbtng_use_wordpress_homepage')==TRUE && mbtng_requested_url() == get_option('mbtng_url'))
        return false;
    else
        return true;
}

//Adds TNG header to Wordpress header
function mbtng_frontend_header() {
    global $tng_head;
    $tng_head = "<style type=\"text/css\">
    #tng_main {line-height: 1.4em}
    #tng_main tr td {padding: 2px 4px; margin:0; border-top: none}
    </style>\r\n".$tng_head;
    if (strpos(mbtng_filename(), 'admin') !== FALSE)
        $tng_head .= '<base href = "'.get_permalink(get_option('mbtng_wordpress_page')).'"/>';
    $tng_head .= "<style type=\"text/css\">#tng_main td.menuback, #tng_main td.spacercol, #tng_main table.page td.section td.fieldname {display:none}</style>";
    if ($tng_head != '')
        echo $tng_head;
}

//Adds TNG footer to Wordpress footer
function mbtng_frontend_footer() {
    global $tng_footer;
    if ($tng_footer != '')
        echo $tng_footer;
}

// Returns the TNG Wordpress post whenever a TNG page is requested
function mbtng_fake_post($posts){
    if (mbtng_display_page()){
        $posts = get_pages('include='.get_option('mbtng_wordpress_page'));
        add_filter('user_trailingslashit', 'mbtng_smart_trailingslashit');
    }
    return $posts;
}

//Outputs the TNG code (outside the loop to minimise CSS conflicts)
function mbtng_output_page() {
    global $tng_output;
    if (mbtng_display_page() && mbtng_use_tng_homepage()) {
        echo $tng_output;
        ob_start();
    }
}

// Buffers Wordpress and TNG code to allow for correct merging of HTML
function mbtng_buffer_start() {
    global $tng_output, $tng_head, $tng_footer;
    $query = mbtng_requested('query');
    if (mbtng_display_page()) {
        $tng_folder = get_option('mbtng_path');
        $filename = mbtng_filename();
        if (mbtng_extension() == 'php') {
            if ($filename == 'newacctform.php' && get_option('mbtng_integrate_logins')) {
                header("Location: ".trailingslashit(get_bloginfo('wpurl'))."wp-login.php?action=register");
                die();
            }
            if ($filename == 'login.php' && get_option('mbtng_integrate_logins')) {
                header("Location: ".trailingslashit(get_bloginfo('wpurl'))."wp-login.php");
                die();
            }
            if ($filename == 'logout.php' && get_option('mbtng_integrate_logins')) {
                if (function_exists('wp_logout_url'))
                    header("Location: ".html_entity_decode(wp_logout_url()));
                else
                    header("Location: ".trailingslashit(get_bloginfo('wpurl'))."wp-login.php?action=logout");
                die();
            }
            $tng_output = mbtng_eval_php($filename);
            $non_template_files = array ('tngrss.php', 'addbookmark.php', 'fpdf.php', 'ufpdf.php');
            if (in_array($filename, $non_template_files) || (isset($_REQUEST['tngprint']) && $_REQUEST['tngprint']==1) || stripos($filename, 'admin') !== FALSE || stripos($filename, 'ajx_') !== FALSE || stripos($filename, 'img_') !== FALSE || stripos($filename, 'find') !== FALSE || stripos($filename, 'rpt_') !== FALSE || stripos($tng_output, '<!-- The Next Generation of Genealogy Sitebuilding') === FALSE) {
                echo $tng_output;
                die();
            } else {
                if ($filename == 'admin/index.php') {
                    $tng_output = '<div id="tng_main">'.mbtng_display_tng_admin(false).'</div>';
                }
                else {
                    $head_start = stripos ($tng_output, '<head>')+6;
                    $head_end = stripos ($tng_output, '</head>');
                    $tng_head = substr ($tng_output, $head_start, $head_end-$head_start);
                    $tng_head = str_replace('.css?', '.css?frontend&', $tng_head);
                    $tng_head = str_replace('.css" rel', '.css?frontend" rel', $tng_head);
                    $footer_start = stripos ($tng_output, '</body>')+7;
                    $footer_end = stripos ($tng_output, '</html>');
                    $tng_footer = substr ($tng_output, $footer_start, $footer_end-$footer_start);
                    $output_start = stripos($tng_output, '>', stripos ($tng_output, '<body'))+1;
                    $output_end = $footer_start-8;
                    $tng_output = '<div id="tng_main">'.substr ($tng_output, $output_start, $output_end-$output_start).'</div>';
                }
                ob_start('');
            }
        }
    }
}

//Flushes the output buffer
function mbtng_buffer_end() {
    @ob_end_flush();
}

// Discards contents of page if TNG is displayed
function mbtng_discard_output() {
    if (mbtng_display_page() && mbtng_use_tng_homepage()) {
        ob_clean();
        // Remove actions in case loop used elsewhere (e.g. in sidebar)
        //remove_action('loop_start', 'mbtng_output_page');
        //remove_action('loop_end', 'mbtng_discard_output');
    }

}

//Runs the TNG PHP code and returns the HTML
function mbtng_eval_php($filename) {
    global $tng_output;
    if ($tng_output == '') {
        $tng_folder = get_option('mbtng_path');
        if (stripos($filename, 'admin') !== FALSE) {
            //$filename = substr ($filename, 6);
            $admin = true;
            //$tng_folder .= 'admin';
        } else {
            ini_set('include_path', ini_get('include_path').PATH_SEPARATOR.$tng_folder);
            $admin = false;
        }
        eval('?>'.get_option('mbtng_globals').'<?php ');
        ob_start();
        $code = file_get_contents(mbtng_folder_trailingslashit($tng_folder).$filename);
        if ($admin | $filename == 'pdfform.php')
            chdir($tng_folder);
        eval("?>$code<?php ");
        $output = ob_get_contents();
        ob_end_clean();
        $tng_output = $output;
    }
    mbtng_close_tng_table();
    return $tng_output;
}