root/branches/nathan/smartsearch.php

<?php
/*
 $Rev: 375 $ | $LastChangedBy: brieb $
 $LastChangedDate: 2008-01-29 18:01:42 -0700 (Tue, 29 Jan 2008) $
 +-------------------------------------------------------------------------+
 | Copyright (c) 2004 - 2007, Kreotek LLC                                  |
 | All rights reserved.                                                    |
 +-------------------------------------------------------------------------+
 |                                                                         |
 | Redistribution and use in source and binary forms, with or without      |
 | modification, are permitted provided that the following conditions are  |
 | met:                                                                    |
 |                                                                         |
 | - Redistributions of source code must retain the above copyright        |
 |   notice, this list of conditions and the following disclaimer.         |
 |                                                                         |
 | - Redistributions in binary form must reproduce the above copyright     |
 |   notice, this list of conditions and the following disclaimer in the   |
 |   documentation and/or other materials provided with the distribution.  |
 |                                                                         |
 | - Neither the name of Kreotek LLC nor the names of its contributore may |
 |   be used to endorse or promote products derived from this software     |
 |   without specific prior written permission.                            |
 |                                                                         |
 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS     |
 | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT       |
 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
 | PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT      |
 | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,   |
 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT        |
 | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,   |
 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY   |
 | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT     |
 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE   |
 | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.    |
 |                                                                         |
 +-------------------------------------------------------------------------+
*/

session_cache_limiter('private');

include("include/session.php");

class smartSearch{

        var $totalcount = 0;

        function smartSearch($db, $sdbid){

                $this->db = $db;

                $this->getSearchParams($sdbid);

        }//end method init


        function getSearchParams($sdbid){

                $querystatement = "
                        SELECT
                                *
                        FROM
                                smartsearches
                        WHERE
                                id = ".((int) $sdbid);

                $this->searchParams = $this->db->fetchArray($this->db->query($querystatement));

        }//end method - getSearchParams


        function find($term, $offset=0){

                $term = trim(mysql_real_escape_string($term));

                // first we take the entered text and explode int by words
                $terms = explode(" ",$term);

                //next we take the list of fields to search and create an array
                $searchFields = explode(",", $this->searchParams["searchfields"]);

                $wheres="";
                foreach($terms as $value){

                        // this series of foreachs builds a SQL OR clause to search
                        // the search fields to match things that start with the term
                        // or has words inside that start with the term.

                        $wheres .="AND (";

                        foreach($searchFields as $field)
                                $wheres .= trim($field)." LIKE '".$value."%' OR ".trim($field)." LIKE '% ".$value."%'\nOR ";

                        $wheres = substr($wheres,0,strlen($wheres)-3);
                        $wheres .= ")";

                }//endforeach

                if($wheres){

                        $finalsearch = "";
                        foreach($searchFields as $field)
                                $finalsearch .= trim($field)." LIKE '".$term."%'\nOR ";

                        $finalsearch = substr($finalsearch,0,strlen($finalsearch)-3);

                        $wheres = "AND ( (".$finalsearch.") OR (".substr($wheres,4)."))";

                }//endif - where

                $securityWhere = "";

                if($this->searchParams["rolefield"]){

                        // If the rolefield is present, we need to make sure the rolefield
                        // of each record matches the logged in users array of roles

                        if ($_SESSION["userinfo"]["admin"]!=1){

                                if(count($_SESSION["userinfo"]["roles"])>0)
                                        $securityWhere = " AND ".$this->searchParams["rolefield"]." IN (".implode(",",$_SESSION["userinfo"]["roles"]).",0)";
                                else
                                        $securityWhere = " AND ".$this->searchParams["rolefield"]." = 0";

                        }//endif admin

                }//endif rolefield

                $querystatement = "
                        SELECT DISTINCT
                                ".$this->searchParams["displayfield"]." AS display,
                                ".$this->searchParams["valuefield"]." AS value,
                                ".$this->searchParams["secondaryfield"]." AS secondary,
                                ".$this->searchParams["classfield"]." AS classname
                        FROM
                                ".$this->searchParams["fromclause"]."
                        WHERE
                                (".$this->subout($this->searchParams["filterclause"]).")
                                ".$securityWhere."
                                ".$wheres."
                        ORDER BY
                                ".$this->searchParams["displayfield"]."
                        LIMIT ".((int) $offset).", 8";


                //need to retireve count of all records so
                // the JS can know wheher to put the show more results on.
                $totalCountStatement = "
                        SELECT
                                COUNT(".$this->searchParams["displayfield"].") AS thecount
                        FROM
                                ".$this->searchParams["fromclause"]."
                        WHERE
                                (".$this->searchParams["filterclause"].")
                                ".$securityWhere."
                                ".$wheres;

                $countrecord = $this->db->fetchArray($this->db->query($totalCountStatement));
                $this->totalcount = $countrecord["thecount"];

                return $this->db->query($querystatement);

        }//end method


        function display($result){
                // This function will spit out a JSON array of records

                $output = "{totalRecords: ".$this->totalcount.", resultRecords: [";

                while($therecord = $this->db->fetchArray($result)){

                        $output .= "{display: '".str_replace("'", "\'", formatVariable($therecord["display"],"bbcode"))."',";
                        $output .= "value: '".str_replace("'", "\'", formatVariable($therecord["value"]))."',";
                        $output .= "secondary: '".str_replace("'", "\'", formatVariable($therecord["secondary"],"bbcode"))."',";
                        $output .= "classname: '".str_replace("'", "\'", formatVariable($therecord["classname"]))."'},";

                }//endwhile

                if($output != "{totalRecords: ".$this->totalcount.", resultRecords: [")
                        $output = substr($output, 0, strlen($output)-1);

                $output .= "] }";

                header("Content-type: text/plain");
                echo $output;

        }//end method - display


        // replace variables
        // strings with entrys like " {{$ENTRY}} "
        // get everything in the {{ }} evaluated
        function subout($string){

                while(strpos($string,"{{")){
                        $start=strpos($string,"{{");
                        $startsubout=$start+2;
                        $endsubout=strpos($string,"}}");
                        $end=$endsubout+2;
                        $temp="";
                        eval(stripslashes("\$temp=".substr($string,$startsubout,$endsubout-$startsubout).";"));
                        $string=substr($string,0,$start).$temp.substr($string,$end);
                }

                return $string;

        }//end function
        
}//end class


//processing
//=========================================================================
if(isset($_GET["sdbid"]) && isset($_GET["t"])){

        $smartSearch = new smartSearch($db, $_GET["sdbid"]);

        if(!isset($_GET["o"]))
                $_GET["o"] = 0;

        $theresult = $smartSearch->find($_GET["t"],((int) $_GET["o"]));

        if(isset($theresult))
                $smartSearch->display($theresult);

}//end if
?>