root/trunk/phpbms/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
                (".$this->searchParams["filterclause"].")
                ".$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
    
}//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
?>