<?php
/**
 *
 * Copyright (C) Villanova University 2007.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2,
 * as published by the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
 
require_once 'Action.php';

require_once 'HTTP/Request.php';
require_once 'Pager/Pager.php';

class Home extends Action
{
    private $db;

    function launch()
    {
        global $configArray;
        global $interface;
        global $user;
        
        $interface->caching = false;
        
        if (!isset($_GET['author'])) {
            PEAR::raiseError(new PEAR_Error('Unknown Author'));
        } else {
            $interface->assign('author', $_GET['author']);
        }
        
        // Retrieve User Search History
        if (isset($_COOKIE['search'])) {
            $sHistory = unserialize($_COOKIE['search']);
            $lastSearch = $sHistory[count($sHistory) - 1];
            $interface->assign('lastsearch', $lastSearch);
        }
        
        if (!$interface->is_cached('layout.tpl|Author' . $_GET['author'])) {
            // Clean up author string
            $author = $_GET['author'];
            if (substr($author, strlen($author) - 1, 1) == ",") {
                $author = substr($author, 0, strlen($author) - 1);
            }
            $author = explode(',', $author);
            $interface->assign('author', $author);
            
            // Connect To Wikipedia
            if (!isset($_GET['page']) || ($_GET['page'] == 1)) {
                $url = 'http://en.wikipedia.org/w/api.php?action=query&prop=revisions&rvprop=content&format=php&titles=' . urlencode("$author[1] $author[0]");
                $client = new HTTP_Request();
                $client->setMethod(HTTP_REQUEST_METHOD_GET);
                $client->setURL($url);
                $result = $client->sendRequest();
                if (!PEAR::isError($result)) {
                    $body = unserialize($client->getResponseBody());

                    //Check if data exists or not
                    if(!$body['query']['pages']['-1']) {
                        $body = array_shift($body['query']['pages']);
                        $info['name'] = $body['title'];

                        $body = array_shift($body['revisions']);
                        $body = explode("\n", $body['*']);

                        $done = 0;
                        while(!$done) {
                            if($body[0] == '') {
                                array_shift($body);
                                continue;
                            }
                            switch(substr($body[0], 0, 2)){
                                case "[[" :
                                case "{{" :
                                case "}}" :
                                case "]]" :
                                case "| " :
                                    //echo " sub : '" . substr($body[0], 0, 2) . "' ";
                                    $stpos = stripos($body[0], "image:");
                                    if(!$stpos)
                                        $stpos = stripos($body[0], "image");
                                    if($stpos) {
                                        $len = 4;
                                        $endpos = stripos($body[0], ".jpg");
                                        if(!$endpos) {
                                            $len = 4;
                                            $endpos = stripos($body[0], ".gif");
                                        }
                                        if($endpos) {
                                            $image = substr($body[0], $stpos,
                                                        $endpos + $len - $stpos);
                                        }
                                    }
                                    array_shift($body);
                                    break;
                                default :
                                    $done = 1;
                                    break;
                            }

                        }

                        $desc = "";
                        $done = 0;
                        while(!$done) {
                            if(substr($body[0], 0, 2) == "==")
                                $done = 1;
                            else {
                                $desc .= $body[0];
                                array_shift($body);
                            }
                        }


                        //Create links to wikipedia

                        $pattern = array();
                        $replacement = array();
                        $pattern[] = '/(\x5b\x5b)([^\x5d|]*)(\x5d\x5d)/';
                        $replacement[] = '<a href="http://en.wikipedia.org/wiki/$2">$2</a>';
                        $pattern[] = '/(\x5b\x5b)([^\x5d]*)\x7c([^\x5d]*)(\x5d\x5d)/';
                        $replacement[] = '<a href="http://en.wikipedia.org/wiki/$2">$3</a>';
                        // Removes citation
                        $pattern[] = '/({{)[^}]*(}})/';
                        $replacement[] = "";

                        $desc = preg_replace($pattern, $replacement, $desc);

                        $info['image'] = $image;
                        $info['description'] = $desc;
                        $interface->assign('info', $info);

                    }
                }
            }
        }

        // Get records by this author
        $this->db = new SOLR($configArray['SOLR']['url']);
        $result = $this->db->query('author:"' . $_GET['author'] . '"', null, 0, 20);
        if (isset($result['record']['id'])) {
            // Hack for issue with XML_Serializer
            $result['record'] = array($result['record']);
        }
        $interface->assign('recordSet', $result['record']);

        $link = (strstr($_SERVER['REQUEST_URI'], 'page=')) ? str_replace('page=' . $_GET['page'], '', $_SERVER['REQUEST_URI']) . 'page=%d' : $_SERVER['REQUEST_URI'] . '&page=%d';
        $options = array('totalItems' => $result['RecordCount'],
                         'mode' => 'sliding',
                         'path' => '',
                         'fileName' => $link,
                         'delta' => 5,
                         'perPage' => 20,
                         'nextImg' => 'Next &raquo;',
                         'prevImg' => '&laquo; Prev',
                         'separator' => '',
                         'spacesBeforeSeparator' => 0,
                         'spacesAfterSeparator' => 0,
                         'append' => false,
                         'clearIfVoid' => true,
                         'urlVar' => 'page',
                         'curPageSpanPre' => '<span>',
                         'curPageSpanPost' => '</span>');
        $pager =& Pager::factory($options);
        $interface->assign('pager', $pager);

        $interface->setTemplate('home.tpl');
        $interface->display('layout.tpl', 'Author' . $_GET['author']);
    }
}

?>