<?php

/**
 * ProcessMaker Open Source Edition
 * Copyright (C) 2004 - 2012 Colosa Inc.23
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information, contact Colosa Inc, 5304 Ventura Drive,
 * Delray Beach, FL, 33484, USA, or email info@colosa.com.
 */

/**
 * Interface to the Solr Search server
 *
 * @author Herbert Saal Gutierrez
 *
 */
class BpmnEngine_SearchIndexAccess_Solr
{
    const SOLR_VERSION = '&version=2.2';
    private $_solrIsEnabled = false;
    private $_solrHost = "";

    public function __construct ($solrIsEnabled = false, $solrHost = "")
    {
        // use the parameters to initialize class
        $this->_solrIsEnabled = $solrIsEnabled;
        $this->_solrHost = $solrHost;
    }

    /**
     * Verify if the Solr service is available
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @return bool
     */
    public function isEnabled ()
    {
        // verify solr server response


        return $this->_solrIsEnabled;
    }

    /**
     * Returns the total number of indexed documents
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @param workspace: workspace name
     * @return total
     */
    public function getNumberDocuments ($workspace)
    {
        if (! $this->_solrIsEnabled)
            return;
            // get configuration information in base to workspace parameter


        // get total number of documents in registry
        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/select/?q=*:*";
        $solrIntruct .= self::SOLR_VERSION;
        $solrIntruct .= "&start=0&rows=0&echoParams=none&wt=json";

        $handlerTotal = curl_init( $solrIntruct );
        curl_setopt( $handlerTotal, CURLOPT_RETURNTRANSFER, true );

        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handlerTotal, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handlerTotal, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handlerTotal, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handlerTotal, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $responseTotal = curl_exec( $handlerTotal );
        curl_close( $handlerTotal );

        // verify the result of solr
        $responseSolrTotal = G::json_decode( $responseTotal );
        if ($responseSolrTotal->responseHeader->status != 0) {
            throw new Exception( "Error returning the total number of documents in Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }
        $numTotalDocs = $responseSolrTotal->response->numFound;
        return $numTotalDocs;
    }

    /**
     * Execute a query in base to Requested data
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @return solr response
     */
    public function executeQuery ($solrRequestData)
    {
        if (! $this->_solrIsEnabled)
            return;
        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $workspace = $solrRequestData->workspace;

        // format request
        $query = empty( $solrRequestData->searchText ) ? '*:*' : $solrRequestData->searchText;
        $query = rawurlencode( $query );
        $start = '&start=' . $solrRequestData->startAfter;
        $rows = '&rows=' . $solrRequestData->pageSize;
        $fieldList = '';
        $cols = $solrRequestData->includeCols;
        if (! empty( $cols )) {
            $fieldList = "&fl=" . implode( ",", $cols );
        }
        $sort = '';
        if ($solrRequestData->numSortingCols > 0) {
            $sort = '&sort=';
            for ($i = 0; $i < $solrRequestData->numSortingCols; $i ++) {
                $sort .= $solrRequestData->sortCols[$i] . "%20" . $solrRequestData->sortDir[$i] . ",";
            }

            $sort = substr_replace( $sort, "", - 1 );
        }
        $resultFormat = empty( $solrRequestData->resultFormat ) ? '' : '&wt=' . $solrRequestData->resultFormat;
        $filters = '';
        $aFilters = explode( ',', $solrRequestData->filterText );
        foreach ($aFilters as $value) {
            $filters .= '&fq=' . urlencode( $value );
        }

        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/select/?q=$query";
        $solrIntruct .= "&echoParams=none";
        $solrIntruct .= self::SOLR_VERSION;
        $solrIntruct .= $start;
        $solrIntruct .= $rows;
        $solrIntruct .= $fieldList;
        $solrIntruct .= $sort;
        $solrIntruct .= $filters;
        $solrIntruct .= $resultFormat;
        // send query
        // search the cases in base to datatable parameters
        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );

        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );
        curl_close( $handler );

        // decode
        $responseSolr = G::json_decode( $response );
        if ($responseSolr->responseHeader->status != 0) {
            throw new Exception( "Error executing query to Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }

        return $responseSolr;
    }

    /**
     * Insert or Update document index
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @return solr response
     */
    public function updateDocument ($solrUpdateDocument)
    {
        if (! $this->_solrIsEnabled)
            return;
        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $solrUpdateDocument->workspace;
        $solrIntruct .= "/update";

        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Content-type:application/xml'
        ) ); // -H
        curl_setopt( $handler, CURLOPT_BINARYTRANSFER, TRUE ); // --data-binary
        curl_setopt( $handler, CURLOPT_POSTFIELDS, $solrUpdateDocument->document ); // data


        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );
        curl_close( $handler );

        $swOk = strpos( $response, '<int name="status">0</int>' );
        if (! $swOk) {
            throw new Exception( "Error updating document in Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }
    }

    /**
     * Commit the changes since the last commit
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @return solr response
     */
    public function commitChanges ($workspace)
    {
        if (! $this->_solrIsEnabled)
            return;
        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/update";

        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Content-type:application/xml'
        ) ); // -H
        curl_setopt( $handler, CURLOPT_BINARYTRANSFER, TRUE ); // --data-binary
        curl_setopt( $handler, CURLOPT_POSTFIELDS, "<commit/>" ); // data


        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );
        curl_close( $handler );

        $swOk = strpos( $response, '<int name="status">0</int>' );
        if (! $swOk) {
            throw new Exception( "Error commiting changes in Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }
    }

    /**
     * Rollback the changes since the last commit
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @return solr response
     */
    public function rollbackChanges ($workspace)
    {
        if (! $this->_solrIsEnabled)
            return;

        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/update";

        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Content-type:application/xml'
        ) ); // -H
        curl_setopt( $handler, CURLOPT_BINARYTRANSFER, TRUE ); // --data-binary
        curl_setopt( $handler, CURLOPT_POSTFIELDS, "<rollback/>" ); // data


        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );
        curl_close( $handler );

        $swOk = strpos( $response, '<int name="status">0</int>' );
        if (! $swOk) {
            throw new Exception( "Error rolling back changes in Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }
    }

    /**
     * Optimize Solr index
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @return solr response
     */
    public function optimizeChanges ($workspace)
    {
        if (! $this->_solrIsEnabled)
            return;

        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/update";

        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Content-type:application/xml'
        ) ); // -H
        curl_setopt( $handler, CURLOPT_BINARYTRANSFER, TRUE ); // --data-binary
        curl_setopt( $handler, CURLOPT_POSTFIELDS, "<optimize/>" ); // data


        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );
        curl_close( $handler );

        $swOk = strpos( $response, '<int name="status">0</int>' );
        if (! $swOk) {
            throw new Exception( "Error optimizing changes in Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }
    }

    /**
     * Return the list of the stored fields in Solr
     *
     * @param string $workspace Solr instance name
     * @throws Exception
     * @return void mixed of field names
     */
    public function getListIndexedStoredFields ($workspace)
    {
        if (! $this->_solrIsEnabled)
            return;

        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/admin/luke?numTerms=0&wt=json";

        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );

        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );
        curl_close( $handler );
        // decode
        $responseSolr = G::json_decode( $response );
        if ($responseSolr->responseHeader->status != 0) {
            throw new Exception( "Error getting index fields in Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }
        return $responseSolr;
    }

    /**
     * Delete all documents from index
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @return solr response
     */
    public function deleteAllDocuments ($workspace)
    {
        if (! $this->_solrIsEnabled)
            return;
            // $registry = Zend_Registry::getInstance();


        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/update";

        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Content-type:application/xml'
        ) ); // -H
        curl_setopt( $handler, CURLOPT_BINARYTRANSFER, TRUE ); // --data-binary
        curl_setopt( $handler, CURLOPT_POSTFIELDS, "<delete><query>*:*</query></delete>" ); // data


        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );

        curl_close( $handler );

        $swOk = strpos( $response, '<int name="status">0</int>' );
        if (! $swOk) {
            throw new Exception( "Error deleting all documents in Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }
    }

    /**
     * Delete specified documents from index
     * @gearman = false
     * @rest = false
     * @background = false
     *
     * @return solr response
     */
    public function deleteDocument ($workspace, $idQuery)
    {
        if (! $this->_solrIsEnabled)
            return;
            // $registry = Zend_Registry::getInstance();


        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/update";

        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Content-type:application/xml'
        ) ); // -H
        curl_setopt( $handler, CURLOPT_BINARYTRANSFER, TRUE ); // --data-binary
        curl_setopt( $handler, CURLOPT_POSTFIELDS, "<delete><query>" . $idQuery . "</query></delete>" ); // data


        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );

        curl_close( $handler );

        $swOk = strpos( $response, '<int name="status">0</int>' );
        if (! $swOk) {
            throw new Exception( "Error deleting document in Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }
    }

    /**
     * Execute a query in base to Request data
     *
     * @param Entity_FacetRequest $facetRequestEntity
     * @return solr response: list of facets array
     */
    public function getFacetsList ($facetRequest)
    {
        if (! $this->_solrIsEnabled)
            return;

        $solrIntruct = '';
        // get configuration information in base to workspace parameter
        $workspace = $facetRequest->workspace;

        // format request
        $query = empty( $facetRequest->searchText ) ? '*:*' : $facetRequest->searchText;
        $query = rawurlencode( $query );
        $start = '&start=0';
        $rows = '&rows=0';
        $facets = '&facet=on&facet.mincount=1&facet.limit=20'; // enable facet and
        // only return facets
        // with minimun one
        // instance
        foreach ($facetRequest->facetFields as $value) {
            $facets .= '&facet.field=' . $value;
        }
        foreach ($facetRequest->facetQueries as $value) {
            $facets .= '&facet.query=' . $value;
        }
        if (! empty( $facetRequest->facetDates )) {
            foreach ($facetRequest->facetDates as $value) {
                $facets .= '&facet.date=' . $value;
            }
            $facets .= '&facet.date.start=' . $facetRequest->facetDatesStart;
            $facets .= '&facet.date.end=' . $facetRequest->facetDatesEnd;
            $facets .= '&facet.date.gap=' . $facetRequest->facetDateGap;
        }
        $filters = '';
        foreach ($facetRequest->filters as $value) {
            $filters .= '&fq=' . $value;
        }
        // echo "<pre>";


        $resultFormat = '&wt=json';

        $solrIntruct = (substr( $this->_solrHost, - 1 ) == "/") ? $this->_solrHost : $this->_solrHost . "/";
        $solrIntruct .= $workspace;
        $solrIntruct .= "/select/?q=$query";
        $solrIntruct .= "&echoParams=none";
        $solrIntruct .= self::SOLR_VERSION;
        $solrIntruct .= $start;
        $solrIntruct .= $rows;
        $solrIntruct .= $facets;
        $solrIntruct .= $filters;
        $solrIntruct .= $resultFormat;

        // send query
        // search the cases in base to datatable parameters
        $handler = curl_init( $solrIntruct );
        curl_setopt( $handler, CURLOPT_RETURNTRANSFER, true );

        //Apply proxy settings
        $sysConf = System::getSystemConfiguration();
        if ($sysConf['proxy_host'] != '') {
            curl_setopt( $handler, CURLOPT_PROXY, $sysConf['proxy_host'] . ($sysConf['proxy_port'] != '' ? ':' . $sysConf['proxy_port'] : '') );
            if ($sysConf['proxy_port'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYPORT, $sysConf['proxy_port'] );
            }
            if ($sysConf['proxy_user'] != '') {
                curl_setopt( $handler, CURLOPT_PROXYUSERPWD, $sysConf['proxy_user'] . ($sysConf['proxy_pass'] != '' ? ':' . $sysConf['proxy_pass'] : '') );
            }
            curl_setopt( $handler, CURLOPT_HTTPHEADER, array ('Expect:'
            ) );
        }

        $response = curl_exec( $handler );
        curl_close( $handler );

        // decode
        $responseSolr = G::json_decode( $response );
        if ($responseSolr->responseHeader->status != 0) {
            throw new Exception( "Error getting faceted list from Solr." . $solrIntruct . " response error: " . $response . "\n" );
        }

        return $responseSolr;
    }
}