<?php

if (!defined('DOKU_PLUGIN')) die('meh');
require_once(DOKU_PLUGIN . 'siteexport/inc/settings.php');
require_once(DOKU_PLUGIN . 'siteexport/inc/debug.php');

use dokuwiki\File\PageResolver;

class siteexport_functions extends DokuWiki_Plugin
{
    public $debug = null;
    public $settings = null;

    public function __construct($init = true, $isAJAX = false)
    {
        if ($init)
        {
            $this->debug = new siteexport_debug();
            $this->debug->isAJAX = $isAJAX;

            $this->settings = new settings_plugin_siteexport_settings($this);
            $this->debug->message("Settings completed: zipFile", $this->settings->zipFile, 1);
        }
    }

    public function getPluginName()
    {
        return 'siteexport';
    }
    
    public function downloadURL()
    {
        $params = array('cache' => 'nocache', 'siteexport' => $this->settings->pattern);

        if ($this->debug->debugLevel() < 5) {
            // If debug, then debug!
            $params['debug'] = $this->debug->debugLevel();
        }
        
        return ml($this->settings->origZipFile, $params, true, '&');
    }

    public function checkIfCacheFileExistsForFileWithPattern($file, $pattern)
    {
        if (!@file_exists($file))
        {
            // If the cache File does not exist, move the newly created one over ...
            $this->debug->message("'{$file}' does not exist. Checking original ZipFile", null, 3);
            $newCacheFile = mediaFN($this->getSpecialExportFileName($this->settings->origZipFile, $pattern));
            
            if (!@file_exists($newCacheFile))
            {
                $this->debug->message("The export must have gone wrong. The cached file does not exist.", array("pattern" => $pattern, "original File" => $this->settings->origZipFile, "expected cached file" => $newCacheFile), 3);
            }
            
            $status = io_rename($newCacheFile, $file);
            $this->debug->message("had to move another original file over. Did it work? " . ($status ? 'Yes, it did.' : 'No, it did not.'), null, 2);
        } else {
            $this->debug->message("The file does exist!", $file, 2);
        }
    }


    /**
     * Returns an utf8 encoded Namespace for a Page and input Namespace
     * @param $NS
     * @param $PAGE
     */
    public function getNamespaceFromID($NS, &$PAGE) {
        global $conf;
        // Check current page - if its an NS add the startpage
        $NS = (new PageResolver($NS))->resolveId($NS);
        $NSa = explode(':', $NS);
        if (!page_exists($NS) && array_pop($NSa) != strtolower($conf['start'])) { // Compare to lowercase since clean lowers it.
            $NS .= ':' . $conf['start'];
            $NS = (new PageResolver($NS))->resolveId($NS);
        }

        $PAGE = noNS($NS);
        $NS = getNS($NS);

        return utf8_encodeFN(str_replace(':', '/', $NS));
    }

    /**
     * create a file name for the page
     **/
    public function getSiteName($ID, $overrideRewrite = false) {
        global $conf;

        if (empty($ID)) return false;

        // Remove extensions
        if ($overrideRewrite) {
            $ID = preg_replace("#\.(php|html)$#", '', $ID);
        }

        $url = $this->wl($this->cleanID($ID), null, true, null, null, $overrideRewrite); // this must be done with rewriting set to override
        $uri = @parse_url($url);
        if ($uri['path'][0] == '/') {
            $uri['path'] = substr($uri['path'], 1);
        }

        return $this->shortenName($uri['path'] . '.' . $this->settings->fileType);
    }

    /**
     * get the Title for the page
     **/
    public function getSiteTitle($ID) {
        if (useHeading('content') && $ID) {
            $heading = null;
            if (class_exists('siteexport_pdfgenerator')) {
                $heading = p_get_metadata(cleanID($ID),'pdftitle',METADATA_RENDER_USING_SIMPLE_CACHE);
            }
            $heading = empty($heading) ? p_get_metadata(cleanID($ID),'breadtitle',METADATA_RENDER_USING_SIMPLE_CACHE) : $heading;
            $heading = empty($heading) ? p_get_first_heading($ID, true) : $heading;
            if ($heading) {
                return $this->xmlEntities($heading);
            }
        }
        $elements = explode(':', $ID);
        return ucwords($this->xmlEntities(array_pop($elements)));
    }

    /**
     * Encoding ()taken from DW - but without needing the renderer
     **/
    public function xmlEntities($string) {
        return htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
    }

    /**
     * Create name for the file inside the zip and the replacements
     **/
    public function shortenName($NAME)
    {
        $NS = $this->settings->exportNamespace;
        $NAME = preg_replace("%^" . preg_quote(DOKU_BASE, '%') . "%", "", $NAME);
        $NAME = preg_replace("%^((_media|_detail)/)?(" . preg_quote($NS, '%') . "/)?%", "", $NAME);
        
        if (strstr($NAME, '%')) { $NAME = rawurldecode($NAME); }

        $this->debug->message("Shortening file to '$NAME'", null, 1);
        return $NAME;
    }

    /**
     * Remove unwanted chars from ID
     *
     * Cleans a given ID to only use allowed characters. Accented characters are
     * converted to unaccented ones
     *
     * @author Andreas Gohr <andi@splitbrain.org>
     * @param  string  $raw_id    The pageid to clean
     * @param  boolean $ascii     Force ASCII
     * @param  boolean $media     Allow leading or trailing _ for media files
     */
    public function cleanID($raw_id, $ascii = false, $media = false) {
        global $conf;
        global $lang;
        static $sepcharpat = null;

        global $cache_cleanid;
        $cache = & $cache_cleanid;

        // check if it's already in the memory cache
        if (isset($cache[(string) $raw_id])) {
            return $cache[(string) $raw_id];
        }

        $sepchar = $conf['sepchar'];
        if ($sepcharpat == null) // build string only once to save clock cycles
        $sepcharpat = '#\\' . $sepchar . '+#';

        $id = trim((string) $raw_id);
        // NO LowerCase for us! - Preserve it, that is why the call is missing here.

        //alternative namespace seperator
        $id = strtr($id, ';', ':');
        if ($conf['useslash']) {
            $id = strtr($id, '/', ':');
        } else {
            $id = strtr($id, '/', $sepchar);
        }

        if ($conf['deaccent'] == 2 || $ascii) $id = utf8_romanize($id);
        if ($conf['deaccent'] || $ascii) $id = utf8_deaccent($id, -1);

        // We want spaces to be preserved when they are in the link.
        global $UTF8_SPECIAL_CHARS2;
        $UTF8_SPECIAL_CHARS2_SAVE = (string) $UTF8_SPECIAL_CHARS2;
        $UTF8_SPECIAL_CHARS2 = str_replace(' ', '', $UTF8_SPECIAL_CHARS2);

        //remove specials
        $id = utf8_stripspecials($id, $sepchar, '\*');
        $UTF8_SPECIAL_CHARS2 = $UTF8_SPECIAL_CHARS2_SAVE;

        if ($ascii) $id = utf8_strip($id);

        //clean up
        $id = preg_replace($sepcharpat, $sepchar, $id);
        $id = preg_replace('#:+#', ':', $id);
        $id = ($media ? trim($id, ':.-') : trim($id, ':._-'));
        $id = preg_replace('#:[:\._\-]+#', ':', $id);

        $cache[(string) $raw_id] = $id;
        return($id);
    }


    /**
     * This builds a link to a wikipage - changed for internal use here
     *
     * It handles URL rewriting and adds additional parameter if
     * given in $more
     *
     * @author Andreas Gohr <andi@splitbrain.org>
     */

    public function wl($id='',$more='',$abs=false,$sep='&amp;', $IDexists=true, $overrideRewrite=false, $hadBase=false){
        global $conf;

        $this->debug->message("Starting to build WL-URL for '$id'", $more, 1);

        if(is_array($more)){
        
            $intermediateMore = '';
            foreach( $more as $key => $value) {
            
                if ( strlen($intermediateMore) > 0 ) {
                    $intermediateMore .= $sep;
                }
            
                if ( !is_array($value) ) {
                    $intermediateMore .= rawurlencode($key) . '=';
                    $intermediateMore .= rawurlencode($value);
                    continue;
                }
                
                foreach( $value as $val ) {
                    if ( strlen($intermediateMore) > 0 ) {
                        $intermediateMore .= $sep;
                    }
                
                    $intermediateMore .= rawurlencode($key) . '[]=';
                    $intermediateMore .= rawurlencode($val);
                }
            }
        
            $more = $intermediateMore;
        } else {
            $more = str_replace(',', $sep, $more);
        }

        $id = idfilter($id);

        if ($abs) {
            $xlink = DOKU_URL;
            if (!$IDexists && !$hadBase) { // If the file does not exist, we have to remove the base. This link my be one to an parallel BASE.
                $xlink = preg_replace('#' . DOKU_BASE . '$#', '', $xlink);
            }
        } else if ($IDexists || $hadBase) { // if the ID does exist, we may add the base.
            $xlink = DOKU_BASE;
        } else {
            $xlink = "";
        }

        // $this->debug->message("internal WL function Before Replacing: '$xlink'", array(DOKU_REL, DOKU_URL, DOKU_BASE, $xlink), 2);
        $xlink = preg_replace('#(?<!http:|https:)//+#', '/', ($abs ? '' : '/') . "$xlink/"); // ensure slashes at beginning and ending, but strip doubles
        $this->debug->message("'$xlink'", array(DOKU_REL, DOKU_URL, DOKU_BASE, $xlink), 2);

        if ($overrideRewrite) {
            $this->debug->message("Override enabled.", null, 1);
            $id = strtr($id, ':', '/');

            $xlink .= $id;
            if ($more) $xlink .= '?' . $more;
        } else {
            if ($conf['userewrite'] == 2) {
                $xlink .= DOKU_SCRIPT . '/' . $id;
                if ($more) $xlink .= '?' . $more;
            }elseif ($conf['userewrite']) {
                $xlink .= $id;
                if ($more) $xlink .= '?' . $more;
            }elseif ($id) {
                $xlink .= DOKU_SCRIPT . '?id=' . $id;
                if ($more) $xlink .= $sep . $more;
            } else {
                $xlink .= DOKU_SCRIPT;
                if ($more) $xlink .= '?' . $more;
            }
        }

        $this->debug->message("internal WL function result: '$xlink'", null, 2);

        return $xlink;
    }

    /**
     * Create the export file name - this is the file where everything is being stored
     * @param $FILE String name of the file
     * @param $PATTERN String additional pattern for re-using old files
     */
    public function getSpecialExportFileName($FILE, $PATTERN = null) {

        if (empty($FILE))
        {
            $FILE = $this->settings->origZipFile;
        }

        if (empty($PATTERN) && empty($this->settings->pattern)) {
            $this->debug->message("Generating an internal md5 pattern. This will go wrong - and won't cache properly.", null, 3);
            $PATTERN = md5(microtime(false));
        }

        // Set Pattern Global for other stuff
        if (empty($this->settings->pattern)) {
            $this->settings['pattern'] = $PATTERN;
        } else {
            $PATTERN = $this->settings->pattern;
        }

        $FA = explode('.', $FILE);
        $EXT = array_pop($FA);
        array_push($FA, 'auto');
        array_push($FA, $PATTERN);
        array_push($FA, $EXT);

        $fileName = implode('.', $FA);
        $this->debug->message("Export Filename for '$FILE' will be: '$fileName'", null, 2);
        return $fileName;
    }

    public function getCacheFileNameForPattern($PATTERN = null)
    {
        if ($PATTERN == null) {
            $PATTERN = $this->settings->pattern;
        }

        return getCacheName($this->getSpecialExportFileName($this->settings->origZipFile, $PATTERN), '.' . basename(mediaFN($this->settings->origZipFile)));
    }

    /**
     * @param integer $counter
     */
    public function startRedirctProcess($counter) {
        global $ID;

        $URL = wl($ID);

        $additionalParameters = $_REQUEST;
        $additionalParameters['startcounter'] = $counter;
        $additionalParameters['pattern'] = $this->settings->pattern;

        unset($additionalParameters['id']);
        unset($additionalParameters['u']);
        unset($additionalParameters['p']);
        unset($additionalParameters['r']);
        unset($additionalParameters['http_credentials']);

        $this->addAdditionalParametersToURL($URL, $additionalParameters);
        $this->debug->message("Redirecting to '$URL'", null, 2);

        send_redirect($URL);
        exit(0); // Should not be reached, but anyways
    }

    /**
     * Builds additional Parameters into the URL given
     * @param $URL
     * @param $newAdditionalParameters
     */
    public function addAdditionalParametersToURL(&$URL, $newAdditionalParameters) {
         
        // Add additionalParameters
        if (!empty($newAdditionalParameters)) {
            foreach ($newAdditionalParameters as $key => $value) {
                if (empty($key) || empty($value)) { continue; }

                if (is_array($value)) {
                    foreach (array_values($value) as $aValue) { // Array Handling
                        $URL .= (strstr($URL, '?') ? '&' : '?') . $key . "[]=$aValue";
                    }
                } else {
                    $append = "$key=$value";
                    $URL .= empty($append) || strstr($URL, $append) ? '' : (strstr($URL, '?') ? '&' : '?') . $append;
                }
            }
        }
    }

    /**
     * Cleans the wiki variables and returns a rebuild URL that has the new variables at hand
     * @param $data
     */
    public function prepare_POSTData($data)
    {
        $NS = array_key_exists( 'ns', $data ) ? $data['ns'] : ( array_key_exists( 'id', $data ) ? $data['id'] : ':' );

        $this->removeWikiVariables($data);
        $data['do'] = 'siteexport';
        $additionalKeys = '';

        ksort($data);

        $this->debug->message("Prepared POST data:", $data, 1);

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

            if (!is_array($value)) { continue; }
            $this->debug->message("Found inner Array:", $value, 1);

            asort($value);
            foreach ($value as $innerKey => $aValue)
            {
                if (is_numeric($innerKey))
                {
                    $innerKey = '';
                }

                $additionalKeys .= "&$key" . "[$innerKey]=$aValue";
            }

            unset($data[$key]);
        }

        return wl($NS, $data, true, '&') . $additionalKeys;
    }

    /**
     * Parses a String into a $_REQUEST Like variant. You have to tell if a decode of the values is needed
     * @param $inputArray
     * @param $decode
     */
    public function parseStringToRequestArray($inputArray, $decode=false)
    {
        global $plugin_controller;

        $outputArray = $inputArray;
        if ( !is_array($inputArray) )
        {
            $intermediate = str_replace("&amp;", "&", $inputArray);

            $outputArray = array();
            foreach( explode("&", $intermediate) as $param ) {
                list($key, $value) = array_pad( explode("=", $param, 2), 2, null );

                // This is needed if we do want to calculate $_REQUEST for a non HTTP-Request
                if ( $decode)
                {
                    $value = urldecode($value);
                }

                if ( empty($key) ) { continue; } // Don't check on Value, because there may be only the key that should be preserved

                if ( substr($key, -2) == '[]' ) {
                    $key = substr($key, 0, -2);
                    if ( !is_array($outputArray[$key]) ) {
                        $outputArray[$key] = array();
                    }
                    
                    array_push($outputArray[$key], $value); // Array Handling
                } else {
                    $outputArray[$key] = $value;
                }
            }
        }

        if (!empty($outputArray['diPlu'])) {

            $allPlugins = array();
            foreach ($plugin_controller->getList(null, true) as $plugin) {
                // check for CSS or JS
                if (!file_exists(DOKU_PLUGIN . $plugin . "/script.js") && !file_exists(DOKU_PLUGIN . $plugin . "/style.css")) { continue; }
                $allPlugins[] = $plugin;
            }

            if (count($outputArray['diPlu']) > (count($allPlugins)/2)) {
                $outputArray['diInv'] = 1;
                $outputArray['diPlu'] = array_diff($allPlugins, $outputArray['diPlu']);
            }
        }

        return $outputArray;
    }

    /**
     * Remove certain fields from the list.
     * @param $removeArray
     * @param $advanced
     * @param $isString
     */
    public function removeWikiVariables(&$removeArray, $advanced = false, $isString = false) {

        $removeArray = $this->parseStringToRequestArray($removeArray);
        $removeKeys = array();

        // 2010-08-23 - If there is still the media set, retain the id for e.g. detail.php
        if (!isset($removeArray['media'])) {
            $removeKeys[] = 'id';
        }

        unset($removeArray['do']);
        $removeKeys[] = 'ns';
        $removeKeys[] = 'call';
        $removeKeys[] = 'sectok';
        $removeKeys[] = 'rndval';
        $removeKeys[] = 'tseed';
        $removeKeys[] = 'http_credentials';
        $removeKeys[] = 'u';
        $removeKeys[] = 'p';
        $removeKeys[] = 'r';
        $removeKeys[] = 'base';
        $removeKeys[] = 'siteexport';
        $removeKeys[] = 'DokuWiki';

        if ( array_key_exists( 'renderer', $removeArray ) && $removeArray['renderer'] == 'xhtml') {
            $removeArray['do'] = 'export_' . $removeArray['renderer'];
            $removeKeys[] = 'renderer';
        }
        
        // Keep custom options
        if ( array_key_exists( 'customoptionname', $removeArray ) &&  is_array($removeArray['customoptionname']) && is_array($removeArray['customoptionvalue']) && count($removeArray['customoptionname']) == count($removeArray['customoptionvalue']))
        {
            for ($index = count($removeArray['customoptionname']); $index >= 0; $index--)
            {
                $removeArray[$removeArray['customoptionname'][$index]] = $removeArray['customoptionvalue'][$index];
            }
            $removeKeys[] = 'customoptionname';
            $removeKeys[] = 'customoptionvalue';
        }

        if ($advanced) {
            if ( array_key_exists( 'renderer', $removeArray ) && $removeArray['renderer'] != 'xhtml' && !empty($removeArray['renderer'])) {
                $removeArray['do'] = 'export_' . $removeArray['renderer'];
            }

            // 2010-08-25 - Need fakeMedia for some _detail cases with rewrite = 2
            if (isset($removeArray['fakeMedia'])) {
                $removeKeys[] = 'media';
                $removeKeys[] = 'fakeMedia';
            }

            /* remove internal params */
            $removeKeys[] = 'ens';
            $removeKeys[] = 'renderer';
            $removeKeys[] = 'site';
            $removeKeys[] = 'namespace';
            $removeKeys[] = 'exportbody';
            $removeKeys[] = 'addParams';
            $removeKeys[] = 'template';
            $removeKeys[] = 'eclipseDocZip';
            $removeKeys[] = 'useTocFile';
            $removeKeys[] = 'JavaHelpDocZip';
            $removeKeys[] = 'depth';
            $removeKeys[] = 'depthType';
            $removeKeys[] = 'startcounter';
            $removeKeys[] = 'pattern';
            $removeKeys[] = 'TOCMapWithoutTranslation';

            $removeKeys[] = 'debug';
        }
        
        foreach($removeKeys as $key) {
            unset($removeArray[$key]);
        }

        if ($isString && is_array($removeArray)) {
            $intermediate = $removeArray;
            $removeArray = array();

            foreach ($intermediate as $key => $value) {
                if (is_array($value)) {
                    foreach (array_values($value) as $aValue) { // Array Handling
                        $removeArray[] = $key . "[]=$aValue";
                    }
                } else {
                    $value = trim($value);

                    $removeArray[] = "$key" . (((empty($value) && intval($value) !== 0)) || $value == '' ? '' : "=$value"); // If the Value is empty, the Key must be preserved
                }
            }

            $removeArray = implode("&", $removeArray); // The &amp; made problems with the HTTPClient / Apache. It should not be a problem to have &
        }
    }

    /**
     * returns a hashed name for the parameters
     * @param $parameters
     */
    public function hashNameForParameters($parameters)
    {
        return md5($parameters);
    }

    /**
     * Takes an URL and transforms it into the path+query part
     * Used several times, e.g. for genering the hash for the cache file
     * @param string $url
     */
    public function urlToPathAndParams($url)
    {
        $query = parse_url($url, PHP_URL_QUERY);
        $path = preg_replace(":^" . DOKU_REL . ":", "", parse_url($url, PHP_URL_PATH));
        return "{$path}?{$query}";
    }

    /**
     * Transforms an $_REQUEST into a Hash that can be used for cron and cache file
     * @param $request
     */
    public function requestParametersToCacheHash($request)
    {
        $params = $this->urlToPathAndParams($this->prepare_POSTData($request));
        $this->debug->message("Calculated the following Cache Hash URL: ", $params, 2);
        return $this->hashNameForParameters($params);
    }

    /**
     * Check a replaceURL against a baseURL - and make the replaceURL relative against it
     * @param replaceURL String URL which will be made relative if needed
     * @param baseURL String URL which is the reference to be made relative against
     * @param existingPageID Array
     */
    public function getRelativeURL($replaceURL, $baseURL, $existingPageID = null)
    {
        // Base is always absolute without anything at the beginning
        if (preg_match("#^(\.\./)+#", $baseURL)) {
            $this->debug->message("The baseURL was not absolute.", $baseURL, 1);
            return $replaceURL;
        }

        $origReplaceURL = $replaceURL;
        $replaceURL = preg_replace("#^(\.\./)+#", '', $replaceURL);

        // Remove ../ at beginning to get the absolute path
        if ($replaceURL == $origReplaceURL) {
            $this->debug->message("The replaceURL was already absolute.", $replaceURL, 1);
            return $replaceURL;
        }

        $replaceParts = explode('/', $replaceURL);
        $fileName = array_pop($replaceParts); // Get file

        $baseParts = explode('/', $baseURL);
        array_pop($baseParts); // Remove file. We only need the path to this location.
        
        $this->debug->message("State before kicking.", array($replaceParts, $baseParts), 1);

        // Kick all ../
        $originalBasePartsCount = count($baseParts);
        $didKickSomeParts = 0; // true means, that some parts of the base URL were identical
        while (count($replaceParts) > 0 && count($baseParts) > 0) {
        
            if ($baseParts[0] == $replaceParts[0]) {
                // Beginning is OK, so remove it.
                array_shift($replaceParts);
                array_shift($baseParts);
                $didKickSomeParts++;
            } else {
                break;
            }
        
        }
        
        $this->debug->message("Found URL '{$replaceURL}' that is relative to current page '{$baseURL}'.", array($replaceParts, $baseParts), 1);
        
        // Remove everything that is identical
        $replaceParts[] = $fileName;
        
        // do the final link calculation
        $finalLink = str_repeat('../', count($baseParts)) . implode('/', $replaceParts);

        // Means nothing was kicked, so other plugin
        $isExternalPage = count($baseParts) == $originalBasePartsCount;

        // the new page is in the same plugin, with a different subcontext and same language
        $isExternalPage = $isExternalPage || ($didKickSomeParts == 1 && $baseParts[0] != $replaceParts[0] && $baseParts[1] == $replaceParts[1] );

        // find out if this is outside of our own export context, beyond the baseURL
        $offsiteTemplate = $this->getConf("offSiteLinkTemplate");
        $this->debug->message("Checking for offsite links", array(
            "baseParts" => count($baseParts),
            "originalBaseParts" => $originalBasePartsCount,
            "ExistingPageID" => $existingPageID,
            "finalLink" => $finalLink,
            "offsiteTemplate" => $offsiteTemplate,
            "isExternalPage" => $isExternalPage,
            "didKickSomeParts" => $didKickSomeParts
            
        ), 1);

        if ( $isExternalPage && $existingPageID != null && !empty($offsiteTemplate)) {

            $offsiteTemplate = str_replace('RAWID', $existingPageID, $offsiteTemplate);
            
            $check = null;
            $mapID = $this->getMapID($existingPageID, null, $check);
            $offsiteTemplate = str_replace('CONTEXTID', array_pop($mapID), $offsiteTemplate);
            $offsiteTemplate = str_replace('LINK', $finalLink, $offsiteTemplate);

            $this->debug->message("Replacing finalLink '${finalLink}' with offsiteLink '${offsiteTemplate}'", null, 1);
            $finalLink = $offsiteTemplate;
        }
        
        return $finalLink;
    }

    public function mapIDWithAnchor(&$n, $key, $postfix)
    {
        if (empty($postfix)) return;
        $n .= '-' . $postfix;
    }
    
    public function getMapID($elemID, $postfix, &$check)
    {
        $meta = p_get_metadata($elemID, 'context', true);

        if (empty($meta['id'])) {
            $title = empty($meta['title']) ? $this->getSiteTitle($elemID) : $meta['title'];
            $meta['id'] = sectionID($this->cleanId($title), $check);
        }

        $mapID = explode('|', $meta['id']);
        array_walk($mapID, array($this, 'mapIDWithAnchor'), $postfix);
            
        return $mapID;
    }
    
    public function hasAuthentication() {
        $user = $this->getConf('defaultAuthenticationUser');
        $password = $this->getConf('defaultAuthenticationPassword');
        return empty($user) ? false : array(
            'user' => $user,
            'password' => $password
        );
    }
    
    public function authenticate() {
        if (!isset($_SERVER['HTTP_AUTHORIZATION']) && $this->hasAuthentication()) {
            $authentication = $this->hasAuthentication();
            $_SERVER['HTTP_AUTHORIZATION'] = 'Basic ' . base64_encode($authentication['user'] . ':' . $authentication['password']);
            $this->debug->message("Re-authenticating with default user from configuration", $authentication['user'], 3);
            return auth_setup();
        }
        
        return false;
    }

    /**
     * Check the secret CSRF token, regardless of the current authorization
     *
     * @param null|string $token security token
     * @param null|boolean $softfail if a message is to be thrown.
     * @return bool success if the token matched
     */
    public function checkSecurityToken($token = null, $softfail = true) {
        /** @var Input $INPUT */
        $secToken = $this->getSecurityToken();
        if ( empty( $secToken) && empty ( $token ) ) return false;
        if($secToken != $token) {
            if ( $softfail !== true ) msg('Security Token did not match. Possible CSRF attack.', -1);
            return false;
        }
        return true;
    }

    /**
     * Return a secret token to be used for CSRF attack prevention
     * This is known to be flawed by default
     *
     * @author  Andreas Gohr <andi@splitbrain.org>
     * @link    http://en.wikipedia.org/wiki/Cross-site_request_forgery
     * @link    http://christ1an.blogspot.com/2007/04/preventing-csrf-efficiently.html
     * @link    https://github.com/splitbrain/dokuwiki/issues/1883
     *
     * @return  string
     */
     public function getSecurityToken() {
        /** @var Input $INPUT */
        global $INPUT;
        return PassHash::hmac('md5', session_id().'siteexport', 'siteexport_salt'.auth_cookiesalt());
    }
}
