<?php

require_once(dirname(__FILE__).'/exalead.class.php');

function convert_url($string)
{
    return str_replace('+', '%2B', $string);
}

$GLOBALS['query_all'] = 'a*';

class Exalead
{

    var $parserId;

    var $data;

    var $currentGroup;
    var $currentCategories = array();
    var $currentSpelling;
    var $currentHit;
    var $currentHitField;
    var $currentHitGroup;
    var $currentHitCategory;
    var $currentAction;
    var $currentTextSegment;
    var $currentQuery;
    var $currentQueryTerm;
    var $currentQueryParameter;
    var $currentKeyword;

    //url de base du produit Exalead
    var $base_cgi = '';

    // Query to dump indexed database
    var $query_all= '';

    /****    Constructeur     *********/


    function Exalead($base_cgi = '', $override_query_all = '')
    {
        $this->data = new ExaleadData();
        $this->currentGroup = new ExaleadGroup();
        $this->currentCategories = array();
        $this->currentSpelling = new ExaleadSpelling();
        $this->currentHit = new ExaleadHit();
        $this->currentHitField = new ExaleadHitField();
        $this->currentHitGroup = new ExaleadHitGroup();
        $this->currentHitCategory = new ExaleadHitCategory();
        $this->currentAction = new ExaleadAction();
        $this->currentTextSegment = new ExaleadTextSegment();
        $this->currentQuery = new ExaleadQuery();
        $this->currentQueryTerm = new ExaleadQueryTerm();
        $this->currentQueryParameter = new ExaleadQueryParameter();
        $this->currentKeyword = new ExaleadKeyword();

        //url de base du produit Exalead
        $this->base_cgi = $base_cgi;
        if (!empty($override_query_all)) {
            $this->query_all = $override_query_all;
        } else {
            $this->query_all = $GLOBALS['query_all'];
        }
    }

    /****  Fonctions d'interface avec le cgi d'Exalead Corporate   ******/

    function set_base_cgi($base_cgi)
    {
        $this->base_cgi = $base_cgi;
    }

    //retourne vrai si une requete a été faite, faux sinon
    function query($varname = 'query')
    {
        if (!empty($_REQUEST[$varname])) {

            $this->first_query(stripslashes($_REQUEST[$varname]));
            return true;

        } elseif (isset($_REQUEST['_C'])) {

            $this->handle_request();
            return true;
        }
        return false;
    }

    //a appeller pour faire la premiere requete
    function first_query($query, $offset = 0)
    {
        if (empty($this->base_cgi)) return false;

        //$tmp = parse_url($this->base_cgi);
        //$view_name = substr($tmp['path'], 5);
        //$query_exa = $this->base_cgi."?_q=".urlencode($query)."&_f=xml2&A=-1&_vn=".$view_name;
        $query_exa = $this->base_cgi."?_q=".urlencode($query)."&_f=xml2";
        if ($offset > 0) {
            $query_exa .= "&_s=".$offset;
        }

        $xml_response = file_get_contents($query_exa);
        $this->parse($xml_response);
    }

    //pour recuperer tous les résultats d'une base indexée
    function get_db_dump()
    {
        $this->first_query($this->query_all);
    }

    function handle_request()
    {
        if (empty($this->base_cgi)) return false;
        if (empty($_REQUEST['_C'])) return false;// _C est le contexte Exalead
        $query_exa = $this->base_cgi.'&_C='.str_replace(' ', '%20', $_REQUEST['_C']).'&_f=xml2';
        if (!empty($_REQUEST['_c'])) {
            $query_exa .= "&_c=".urlencode($_REQUEST['_c']);
        }
        if (!empty($_REQUEST['_s'])) {
            $query_exa .= "&_s=".((int) $_REQUEST['_s']);
        }
        if (isset($_REQUEST['_z'])) {
            $query_exa .= "&_z=".$_REQUEST['_z'];
        }
        $xml_response = file_get_contents($query_exa);
        $this->parse($xml_response);
    }

    /********      Fonctions annexes relatives au parser     ********/

    function createParser()
    {
        $this->parserId = xml_parser_create(); 
        xml_set_element_handler($this->parserId, array(&$this, "startElement"), array(&$this, "endElement"));
        xml_set_character_data_handler($this->parserId, array(&$this, "parsePCData"));
    }

    function freeParser()
    {
        xml_parser_free($this->parserId);
    }

    function parseString($string)
    {
        if (!xml_parse($this->parserId, $string, true)) {
            die(sprintf("XML error: %s at line %d",
            xml_error_string(xml_get_error_code($this->parserId)),
            xml_get_current_line_number($this->parserId)));
        }
    }


    /********        Méthode qui lance le parser           ***********/

    function parse($string)
    {
        $this->createParser();
        $this->parseString($string);
        $this->freeParser();
    }

    /*********      fonctions spécifiques à chaque balise     ******/

    //Ces méthodes peuvent être surchargées

    function startQuery(&$attrs)
    {
        $this->currentQuery->query = utf8_decode($attrs['QUERY']);
        $this->currentQuery->context = $attrs['CONTEXT'];
        $this->currentQuery->time = $attrs['TIME'];
        if (isset($attrs['INTERRUPTED'])) $this->currentQuery->interrupted = $attrs['INTERRUPTED'];
        if (isset($attrs['BROWSED'])) $this->currentQuery->browsed = $attrs['BROWSED'];
    }

    function StartQueryTerm(&$attrs)
    {
        $this->currentQueryTerm->level = $attrs['LEVEL'];
        $this->currentQueryTerm->regexp = utf8_decode($attrs['REGEXP']);
    }

    function startQueryParameter(&$attrs)
    {
        $this->currentQueryParameter->name = $attrs['NAME'];
        if (isset($attrs['VALUE'])) $this->currentQueryParameter->value = utf8_decode($attrs['VALUE']);
    }

    function startKeyword(&$attrs)
    {
        if (isset($attrs['NAME'])) $this->currentKeyword->name = $attrs['NAME'];
        $this->currentKeyword->display = utf8_decode( $attrs['DISPLAY'] );
        $this->currentKeyword->count = $attrs['COUNT'];
        $this->currentKeyword->automatic = $attrs['AUTOMATIC'];
        if (isset($attrs['REFINEHREF'])) $this->currentKeyword->refine_href = convert_url($attrs['REFINEHREF']);
        if (isset($attrs['EXCLUDEHREF'])) $this->currentKeyword->exclude_href = $attrs['EXCLUDEHREF'];
        if (isset($attrs['RESETHREF'])) $this->currentKeyword->reset_href = $attrs['RESETHREF'];
    }

    function startHits(&$attrs)
    {
        $this->data->nmatches = $attrs['NMATCHES'];
        $this->data->nhits = $attrs['NHITS'];
        if (isset($attrs['INTERRUPTED'])) $this->data->interrupted = $attrs['INTERRUPTED'];
        $this->data->last = $attrs['LAST'];
        $this->data->end = $attrs['END'];
        $this->data->start = $attrs['START'];
    }

    function startHit(&$attrs)
    {
        $this->currentHit->url = $attrs['URL'];
        $this->currentHit->score = $attrs['SCORE'];
    }

    function startHitGroup(&$attrs)
    {
        $this->currentHitGroup->title = utf8_decode($attrs['TITLE']);
        $this->currentHitGroup->gid = $attrs['GID'];
    }

    function startHitCategory(&$attrs)
    {
        $this->currentHitCategory->name = $attrs['NAME'];
        $this->currentHitCategory->display = utf8_decode($attrs['DISPLAY']);
        $this->currentHitCategory->cref = $attrs['CREF'];
        $this->currentHitCategory->gid = $attrs['GID'];
        if (isset($attrs['BROWSEHREF'])) $this->currentHitCategory->browsehref = $attrs['BROWSEHREF'];
    }

    function startAction(&$attrs)
    {
        $this->currentAction->display = $attrs['DISPLAY'];
        $this->currentAction->kind = $attrs['KIND'];
        if (isset($attrs['EXECHREF']))$this->currentAction->execHref = $attrs['EXECHREF'];
    }

    function startHitField(&$attrs)
    {
        $this->currentHitField->name = $attrs['NAME'];
        if (isset($attrs['VALUE'])) $this->currentHitField->value = utf8_decode($attrs['VALUE']);
    }

    function startTextSeg(&$attrs)
    {
        $this->currentTextSegment->setHighlighted($attrs['HIGHLIGHTED']);
    }
    function startTextCut(&$attrs) { }

    function startSpellingSuggestionVariant(&$attrs)
    {
        $this->currentSpelling->setDisplay($attrs['DISPLAY']);
        $this->currentSpelling->setQueryHref($attrs['QUERY']);
    }

    function startGroup(&$attrs)
    {
        $this->currentGroup->setGid(utf8_decode($attrs['GID']));
        $this->currentGroup->setTitle(utf8_decode($attrs['TITLE']));
        $this->currentGroup->setClipped($attrs['CLIPPED']);
        $this->currentGroup->setCount($attrs['COUNT']);
        $this->currentGroup->setBrowsed($attrs['BROWSED']);
        if (isset($attrs['CLIPHREF'])) $this->currentGroup->setClipHref($attrs['CLIPHREF']);
        if (isset($attrs['RESETHREF'])) $this->currentGroup->setResetHref($attrs['RESETHREF']);
    }

    function startCategory(&$attrs)
    {
        $currentCategory = new ExaleadCategory();
        $currentCategory->name = utf8_decode($attrs['NAME']);
        $currentCategory->display = utf8_decode($attrs['DISPLAY']);
        $currentCategory->count = $attrs['COUNT'];
        $currentCategory->automatic = $attrs['AUTOMATIC'];
        $currentCategory->cref = $attrs['CREF'];
        if (isset($attrs['REFINEHREF'])) $currentCategory->refine_href = convert_url($attrs['REFINEHREF']);
        $currentCategory->exclude_href = '_c=-'.$currentCategory->cref;
        if (isset($attrs['RESETHREF'])) {
            $currentCategory->reset_href = $attrs['RESETHREF'];
        }
        $currentCategory->gid = $attrs['GID'];
        $currentCategory->gcount = $attrs['GCOUNT'];
        $this->currentCategories[] = $currentCategory;
    }

    function startSearch(&$attrs) { }

    function startElement($parser, $name, $attrs) 
    {
        //recupération des paramètres de query
        switch ($name) {
            case 'QUERY':
                $this->startQuery($attrs);
                break;
            case 'QUERYTERM':
                $this->startQueryTerm($attrs);
                break;
            case 'QUERYPARAMETER':
                $this->startQueryParameter($attrs);
                break;
            case 'KEYWORD':
                $this->startKeyword($attrs);
                break;
            case 'HITS':
                $this->startHits($attrs);
                break;
            case 'HIT':
                $this->startHit($attrs);
                break;
            case 'HITFIELD':
                $this->startHitField($attrs);
                break;
            case 'HITGROUP':
                $this->startHitGroup($attrs);
                break;
            case 'HITCATEGORY':
                $this->startHitCategory($attrs);
                break;
            case 'ACTION':
                $this->startAction($attrs);
                break;
            case 'TEXTSEG':
                $this->startTextSeg($attrs);
                break;
            case 'TEXTCUT':
                $this->startTextCut($attrs);
                break;
            case 'SPELLINGSUGGESTIONVARIANT':
                $this->startSpellingSuggestionVariant($attrs);
                break;
            case 'GROUP':
                $this->startGroup($attrs);
                break;
            case 'CATEGORY':
                $this->startCategory($attrs);
                break;
            case 'SEARCH':
                $this->startSearch($attrs);
                break;
        }
    }

    function endQuery()
    {
        $this->data->query = $this->currentQuery;
        $this->currentQuery->clear();
    }
    function endQueryTerm()
    {
        $this->currentQuery->addTerm($this->currentQueryTerm);
        $this->currentQueryTerm->clear();
    }
    function endQueryParameter()
    {
        $this->currentQuery->addParameter($this->currentQueryParameter);
        $this->currentQueryParameter->clear();
    }
    function endKeyword()
    {
        $this->data->addKeyword($this->currentKeyword);
        $this->currentKeyword->clear();
    }
    function endHits()
    {
    }
    function endHit()
    {
        $this->data->addHit($this->currentHit);
        $this->currentHit->clear();
    }
    function endHitGroup()
    {
        $this->currentHit->addHitGroup($this->currentHitGroup);
        $this->currentHitGroup->clear();
    }
    function endHitCategory()
    {
        $this->currentHitGroup->addHitCategory($this->currentHitCategory);
        $this->currentHitCategory->clear();
    }
    function endAction()
    {
        $this->currentHit->addAction($this->currentAction);
        $this->currentAction->clear();
    }
    function endHitField()
    {
        $this->currentHit->addHitField($this->currentHitField);
        $this->currentHitField->clear();
    }
    function endTextSeg()
    {
        $this->currentHitField->addTextSegment($this->currentTextSegment);
        $this->currentTextSegment->clear();
    }
    function endTextCut()
    {
        $this->currentHitField->setHasTextCut(true);
    }
    function endSpellingSuggestionVariant()
    {
        $this->data->addSpelling($this->currentSpelling);
        $this->currentSpelling->clear();
    }
    function endGroup()
    {
        $this->data->addGroup($this->currentGroup);
        $this->currentGroup->clear();
    }
    function endCategory()
    {
        //the parent element is a Group element ?
        if (count($this->currentCategories) == 1) {
            $this->currentGroup->addCategory(array_pop($this->currentCategories));
        } else {
            //var_dump($this->currentCategories);
            $category = array_pop($this->currentCategories);
            //reset($this->currentCategories);
            end($this->currentCategories);
            //var_dump($this->currentCategories);
            $parentCategory = &$this->currentCategories[key($this->currentCategories)];
            //var_dump($parentCategory);
            $parentCategory->addCategory($category);
        }
    }
    function endSearch() { }


    function endElement($parser, $name) 
    {
        switch ($name) {
            case 'QUERY':
                $this->endQuery();
                break;
            case 'QUERYTERM':
                $this->endQueryTerm();
                break;
            case 'QUERYPARAMETER':
                $this->endQueryParameter();
                break;
            case 'KEYWORD':
                $this->endKeyword();
                break;
            case 'HITS':
                $this->endHits();
                break;
            case 'HIT':
                $this->endHit();
                break;
            case 'HITFIELD':
                $this->endHitField();
                break;
            case 'HITGROUP':
                $this->endHitGroup();
                break;
            case 'HITCATEGORY':
                $this->endHitCategory();
                break;
            case 'ACTION':
                $this->endAction();
                break;
            case 'TEXTSEG':
                $this->endTextSeg();
                break;
            case 'TEXTCUT':
                $this->endTextCut();
                break;
                //gestion suggestions d'orthographe
            case 'SPELLINGSUGGESTIONVARIANT':
                $this->endSpellingSuggestionVariant();
                break;
                //gestion des categories pour raffiner
            case 'GROUP':
                $this->endGroup();
                break;
            case 'CATEGORY':
                $this->endCategory();
                break;
            case 'SEARCH':
                $this->endSearch();
                break;
        }
    }

    function parsePCData($parser, $text)
    {
        $this->currentTextSegment->append(utf8_decode($text));
    }
}

?>