<?php
/**
* Relevant Search
*
*/
ini_set('display_errors', 1);
class RelevantSearch {
public $return=array();
public $db;
public $type;
public $generalQ=array();
public $restriction=array();
public $searchParams=array();
public $select=array();
public $tables=array();
public $links=array();
public $addedTables=array();
/**
* Making connection with DB, setting UTF-8 relation
* and deafault General params relation type
*
* @param array $dbopt
*/
public function __construct($dbopt) {
$this->db = new PDO("mysql:host=".$dbopt['host'].";dbname=".$dbopt['dbname'], $dbopt['login'], $dbopt['pass']);
$this->db->exec('SET NAMES UTF8');
$this->type='or';
}
/**
* Adding table to the search query
*
* @param string $name - table name
* @param string $as - synonym of table
*/
public function addTable($name,$as) {
$this->tables[]=array("name"=>$name,"as"=>$as);
$this->addedTables[]=$as;
}
/**
* Add field wich will be selected for output
*
* @param string $base - table name
* @param mixed $name - column name
*/
public function addSelect($base,$name) {
if(is_array($name)) {
foreach($name as $el) {
if(!array_key_exists($base.".".$el,$this->select))
$this->select[$base.".".$el]=$base.".".$el." ".$base."_".$el;
}
}
}
/**
* Add link between tables
*
* @param string $base1 - table1 where linking (where linking condition is placed)
* @param string $link1 - column in table1 wich linked
* @param string $base2 - table2 with what linking
* @param string $link2 - column in table2 wich linked
*/
public function addLink($base1,$link1,$base2,$link2) {
$this->links[$base1]=$base1.".".$link1."=".$base2.".".$link2;
}
/**
* Adding Restriction to search
*
* @param string $table - table name
* @param string $name - column name
* @param string $oper - operator
* @param string $value - value
* @param bool $date - make date transformation
* @param bool $date_format - date format
*/
public function addRestriction($table,$name,$oper,$value,$date=false,$date_format="") {
switch($oper) {
case ">":
$this->restriction[$table][]="$table.$name>$value";
break;
case "<":
$this->restriction[$table][]="$table.$name<$value";
break;
case "<=":
$this->restriction[$table][]="$table.$name<=$value";
break;
case ">=":
$this->restriction[$table][]="$table.$name>=$value";
break;
case "=":
$this->restriction[$table][]="$table.$name='$value'";
break;
case "!=":
$this->restriction[$table][]="$table.$name!='$value'";
break;
case "like":
$this->restriction[$table][]="$table.$name like '".trim($value)."%'";
break;
case "between":
if($date) {
$this->restriction[$table][]="$table.$name between '".date($date_format,strtotime(trim($value[0])))."' and '".date($date_format,strtotime(trim($value[1])))."'";
} else {
$this->restriction[$table][]="$table.$name between '".trim($value[0])."' and '".trim($value[1])."'";
}
break;
}
}
/**
* Adding General Search param
*
* @param string $table - table name
* @param string $name - column name
* @param string $oper - operator
* @param string $value - value
* @param float $rate - relevant rate
* @param bool $date - make date transformation
* @param bool $date_format - date format
*/
public function addGeneral($table,$name,$oper,$value,$rate,$date=false,$date_format="") {
$false=false;
if(!is_array($value) && $date) $value=date($date_format,strtotime(trim($value)));
switch($oper) {
case ">":
$this->generalQ[]="$table.$name>$value";
break;
case "<":
$this->generalQ[]="$table.$name<$value";
break;
case "<=":
$this->generalQ[]="$table.$name<=$value";
break;
case ">=":
$this->generalQ[]="$table.$name>=$value";
break;
case "=":
$this->generalQ[]="$table.$name='$value'";
break;
case "!=":
$this->generalQ[]="$table.$name!='$value'";
break;
case "like":
$this->generalQ[]="$table.$name like '".trim($value)."%'";
break;
case "between":
if($date) {
$this->generalQ[]="$table.$name between '".date($date_format,strtotime(trim($value[0])))."' and '".date($date_format,strtotime(trim($value[1])))."'";
} else {
$this->generalQ[]="$table.$name between '".trim($value[0])."' and '".trim($value[1])."'";
}
break;
default:
$false=true;
break;
}
if(!$false) {
$this->addSelect($table,array($name));
$this->searchParams[$table."_".$name][]=array($oper,$value,$rate,$date);
}
}
/**
* Adding Bonus Search param
*
* @param string $table - table name
* @param string $name - column name
* @param string $oper - operator
* @param string $value - value
*/
public function addSecondary($table,$name,$oper,$value,$rate,$date=false) {
$this->addSelect($table,array($name));
$this->searchParams[$table."_".$name][]=array($oper,$value,$rate,$date);
}
/**
* Setting type of relation between General Search params
*
* @param string $type - 'or' or 'and'
*/
public function setType($type) {
$this->type=$type;
}
/**
* Make query and sort it by relevantion
*
* @return array - array of fetched query data sorted by relevantion
*/
public function make() {
$first=array_shift($this->tables);
$FROM=$first["name"]." ".$first["as"];
$JOINS='';
foreach($this->tables as $table) {
$RESTRICT=(count($this->restriction[$table['as']])>0)?" and (".implode(" and ",$this->restriction[$table['as']]).")":"";
if(strlen($RESTRICT)>0) {$JOIN=" JOIN ";} else {$JOIN=" LEFT JOIN ";}
$JOINS.=$JOIN.$table['name']." ".$table['as']." on (".$this->links[$table['as']].$RESTRICT.")";
}
$sql=
"
SELECT DISTINCT ".implode(",",$this->select)." from ".$FROM.$JOINS."
WHERE
( ".implode(" ".$this->type." ",$this->generalQ)." )
";
$query=$this->db->query($sql);
$res=$query->fetchAll();
$this->doRelevant($res);
krsort($this->return);
return $this->return;
}
/**
* Sort fetched query by relevantion
*
* @param array $data - fetched query data
*/
private function doRelevant($data) {
foreach($data as $el) {
$rel=0;
foreach($this->searchParams as $k=>$v) {
foreach($v as $val) {
switch($val[0]) {
case ">":
if($el[$k]>$val[1]) $rel+=$val[2];
break;
case "<":
if($el[$k]<$val[1]) $rel+=$val[2];
break;
case "<=":
if($el[$k]<=$val[1]) $rel+=$val[2];
break;
case ">=":
if($el[$k]>=$val[1]) $rel+=$val[2];
break;
case "=":
if($el[$k]==$val[1]) $rel+=$val[2];
break;
case "!=":
if($el[$k]!=$val[1]) $rel+=$val[2];
break;
case "like":
if(mb_eregi("^".$val[1]."",trim($el[$k]))) $rel+=$val[2];
break;
case "between":
if($val[3]) {
if(strtotime($el[$k])>=strtotime(trim($val[1][0])) && strtotime($el[$k])<=strtotime(trim($val[1][1]))) $rel+=$val[2];
} else {
if($el[$k]>=trim($val[1][0]) && $el[$k]<=trim($val[1][1])) $rel+=$val[2];
}
break;
}
}
}
$this->return[(string)$rel][]=$el;
}
}
}
/**
* Search
*
*/
class Search extends RelevantSearch {
public $tableData=array();
public $linked_to_table=array();
/**
* Set DB connect params and tables info
*
* @param array $dbopt - db params
* @param array $tables - array of tables information
*/
public function __construct($dbopt,$tables) {
parent::__construct($dbopt);
$this->tableData=$tables;
}
/**
* Join the table to the search
*
* @param string $table - table name with linking table like "table_linked_to.table"
*/
public function Join($table) {
if(eregi("\.",$table)){
$tabls=explode(".",$table);
$this->addTable($this->tableData[$tabls[1]]['name'],$tabls[1]);
if(strlen($tabls[0])>0) {
$this->linked_to_table[$tabls[1]]=$tabls[0];
}
} else {
$this->addTable($this->tableData[$table]['name'],$table);
}
}
/**
* Run search query
*
* @return array - sorted array of data sorted by relevant desc
*/
public function find() {
foreach($this->addedTables as $table) {
$this->addSelect($table,$this->tableData[$table]['out']);
if(array_key_exists($table,$this->linked_to_table)) {
$this->addLink(
$table,
$this->tableData[$table]["links"][$this->linked_to_table[$table]]['local'],
$this->linked_to_table[$table],
$this->tableData[$table]["links"][$this->linked_to_table[$table]]['foreign']
);
}
}
return $this->make();
}
}
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