phplibrary/core/mapper/mapper.php

<?php

require_once 'core/primitive.php';

/**
 * Èñïîëüçîâàòü èíòåðôåéñû ÷òîáû îïðåäåëèòü êàêèå äåéñòâèÿ ìîæíî ñîâåðøàòü ñ îáüåêòîì è òàêèì îáðàçîì 
 * Ñòðîèòü íàáîð äåéñòâèé Action è îòîáðàæåíèé View äëÿ îáüåêòà
 * Ò.ê îòîáðàæåíèå äàííûõ ìîæåò áûòü íå òîëüêî íà òàáëèöó áàç äàííûõ
 * È âîçìîæíî ðåàëèçîâàííû âñå èíòåðôåéñû
 */
interface IDataList
{
    function findAll (Collection $request, $id = null); 
    function findById ($id);
    function getCount (Collection $request, $id);
}

interface IDataSave 
{
    function saveTo ($o);
    function updateTo ($o);
}

/**
 * Îòîáðàæåíèå òàáëèöû áàçû äàííûõ â îáüåêòû
 * Mapper -> DataMapper implements IDataList, IDataSave, IDataSort, IDataDelete ...
 *
 * @package core
 */
class DataMapper implements IDataList
{
    /* Õðàíèòü ìåòàäàííûå â ñòàòè÷åñêîì ñâîéñòâå êëàññà äëÿ îòîòáðàæåíèÿ ?!, + Ñêðèïò äëÿ ãåíåðàöèè ìåòàäàííûõ!!
    */
    public $factory;
    public $className; /* Êëàññ íà êîòîðûé áóäåò îòîáðàæàòüñÿ ñòðî÷êà òàáëèöû */
    public $filter = ""; /* */
    public $schema = array (); /* Ñîîòâåòñòâèå ìåæäó ñâîéñòâîì îáüåêòà è ñòîëáöîì, äîáàâèòü òèï äëÿ çàïèñåé !! */
    public $database; /* Òàáëèöà */
    public $index; /* Èíäåêñíûé ñòîëáåö */
    public $db; /* Ñîåäèíåíèå ñ áàçîé äàííûõ */
    public $reference = array (null, null);

    public function __construct ()
    {
    }

    public function setRange ($stmt, $page, $size)
    {
        $stmt->setLimit ($size);
        $stmt->setOffset (($page-1) * $size);
    }

    public function listSQL (array $list)
    {
        return implode ($list, ",");
    }

    /**
     * Ïîèñê ñòðîêè â òàáëèöå ïî èäåíòèôèêàòîðó
     * @param $id Çíà÷åíèå èäåíòèôèêàòîðà
     * @return Îáüåêò êëàññà $className   
     */
    public function findById ($id)
    {
        // Ñòðîêè çàïðîñà ïðåîáðàçîâàòü â ìåòîäû (getSQLSelect ...)
        // Query::from($this->database)->where ($this->index, "=", $id)->select();
        $stmt = $this->db->prepareStatement ("SELECT * FROM ".$this->database." WHERE ".$this->index." = ?");
        $stmt->setInt (1, $id);
        $rs = $stmt->executeQuery ();
        $rs->next ();
        return $this->mapOne ($rs);
    }
    
    /**
     * Ïðåîáðàçóåò parseResult â îáüåêò 
     */   
    public /* private */ function mapOne ($rs)
    {
        $result = new $this->className ();
        foreach ($this->schema as $key => $value) {
            list($value) = $value;
            $result->$value->setRes($rs, $key); 
        }
        return $result;
    }    

    public /* private */ function mapAll ($rs)
    {
        $result = array ();
        // Ïðåîáðàçîâàíèå SQL â îáüåêò
        while ($rs->next ()) {
            $result[] = $this->mapOne ($rs);
        }
        return $result;
    }

    private function clean ($value) {
        return strtolower(trim(iconv('utf-8', 'cp1251', $value)));
    }

    /**
     * Ïðåîáðàçóåò ïàðàìåòðû ôîðìû â SQL çàïðîñ WHERE
     * @param array $params 
     * @param array $schema
     * @return string   
     */
    public function requestToSQL (Collection $request, array $schema)
    {
        $result = array ();
        foreach ($schema as $key => $value) {
            $param = $request->get ($key);
            if ($param) {
                array_push ($result, "lower (".$value.") LIKE '".$this->clean ($param)."%'");
            }
        }
        if (empty ($result)) return null;
        return implode ($result, " AND ");
    }

    /**
     * Óäàëåíèå ñòðîê èç òàáëèöû ñ çàäàííûìè èíäåêñàìè 
     * @param $list array Ìàññèâ èäåíòåôèêàòîðîâ   
     */
    public function deleteList (array $list)
    {
        // Query::from($this->database)->where($this->index, "in", $list)->delete();
        $sql = "DELETE FROM " . $this->database . " WHERE " . $this->index . " IN (" . $this->listSQL ($list) . ")";
        return $this->db->executeQuery ($sql);
    }

    public static function findKey (array $schema, $sort)
    {
        foreach ($schema as $key => $item) {
            list($item) = $item;
            if ($item == $sort) {
                return $key;
            }
        }
        return $sort;
    }

    public function getOrder (Collection $request)
    {
        $order = "";        
        $sort = $request->get('key');
        $desc = ($request->get('desc') == 0)? 'DESC' : 'ASC';
        if ($sort) {   
            $sort = self::findKey ($this->schema, $sort);
            $order = " ORDER BY $sort $desc";
        }
        return $order;    
    }

    /**
     * Èçâëåêàåò ñïèñîê çàïèñåé èç áàçû äàííûõ
     */
    public function findAll (Collection $request, $id = null)
    {
        $name0 = $this->database;
        $foreign = $this->reference[1];
        // Ïåðåïèñàòü èñïîëüçóÿ Query !!!
        if ($foreign && $id) {
            $filter = ($this->filter)?$filter = " AND ".$this->filter: "";
            $sql = "SELECT t1.* FROM $name0 as t1 WHERE t1.$foreign = $id " . $filter.self::getOrder($request);
        } else {
            $filter = ($this->filter)?$filter = " WHERE " . $this->filter: "";
            $sql = "SELECT * FROM $name0 " . $filter . self::getOrder($request);
        }
        $stmt = $this->db->prepareStatement ($sql);

        $page  = $request->get('page');
        $limit = $request->get('size');
        if ($page && $limit) {
            $this->setRange($stmt, $page, $limit);
        }

        return $this->mapAll($stmt->executeQuery());
    }

    public function getCount (Collection $request, $id)
    {
        $name0 = $this->database;
        $foreign = $this->reference[1];
        // Ïåðåïèñàòü èñïîëüçóÿ Query !!!
        if ($foreign && $id) {
            $filter = ($this->filter)?$filter = " AND " . $this->filter: "";
            $sql = "SELECT count(t1.*) as length FROM $name0 as t1 WHERE t1.$foreign = $id " . $filter;
        } else {
            $filter = ($this->filter)?$filter = " WHERE " . $this->filter: "";
            $sql = "SELECT count(*) as length FROM $name0 " . $filter;
        }
        $rs = $this->db->executeQuery($sql);
        $rs->next();
        return $rs->getInt('length');
    }

    /**
     * Äîáàâëåíèå çàïèñè â áàçó äàííûõ
     * @param $o Îáüåêò äëÿ çàïèñè â áàçó äàííûõ
     */
    public function saveTo (Model $o)
    {
        $keys = array ();
        $values = array ();
        foreach ($this->schema as $key => $value) {
            list($value) = $value;
            if ($key != $this->index) {
                $keys[] = $key;
                $values[] = "'".$o->$value."'"; 
            }            
        }
        $stmt = $this->db->prepareStatement ("INSERT INTO ".$this->database." (".implode ($keys, ",").") VALUES (".implode ($values, ",").")");
        $stmt->executeQuery ();
    }

    /**
     * Îáíîâëÿåò çàïèñü â áàçå äàííûõ
     * @param $o Îáüåêò äëÿ îáíîâëåíèÿ   
     */
    public function updateTo (Model $o)
    {
        $keys_values = array ();
        foreach ($this->schema as $key => $value) {
            list($value) = $value;
            if ($key != $this->index && !($o->$value instanceof FKey)) {
                $keys_values[] = $key." = '".$o->$value."'"; 
            }            
        }        
        // Äëÿ âñåõ äîëæåí áûòü èäåíòåôèêàòîð id 
        $stmt = $this->db->prepareStatement ("UPDATE ".$this->database." SET ".implode($keys_values, ",")." WHERE ".$this->index." = ".$o->id);
        $stmt->executeQuery ();
    }

    function saveDB (Model $o)
    {
        if ($o->id) {
            $this->updateTo($o);
        } else {
            $this->saveTo($o);
        }
    }

    function getModel($name)
    {
        require_once 'core/Mapper/Factory.php';
        if (!$this->factory) {
            $this->factory = new ModelFactory($this->db);
        }
        return $this->factory->getModel($name);
    }
}

/**
 *
 */
class Model
{
    public function __construct ()
    {
        foreach (get_class_vars (get_class ($this)) as $key => $value) {
            $this->$key = new Primitive ();
        }
    }
    // __get, __set ìåòîäû. Â ìåòàäàííûõ õðàíèòñÿ òèï ñâîéñòâ, ïðîâåðÿòü ïðè ïðèñâàèâàíèè!! 
}

?>