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Current File : /var/app/karina/prd/cms/apps/libraries/PHPExcel/CachedObjectStorage/SQLite.php

<?php

/**
 * PHPExcel_CachedObjectStorage_SQLite
 *
 * Copyright (c) 2006 - 2015 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_CachedObjectStorage
 * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    ##VERSION##, ##DATE##
 */
class PHPExcel_CachedObjectStorage_SQLite extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache
{
    /**
     * Database table name
     *
     * @var string
     */
    private $TableName = null;

    /**
     * Database handle
     *
     * @var resource
     */
    private $DBHandle = null;

    /**
     * Store cell data in cache for the current cell object if it's "dirty",
     *     and the 'nullify' the current cell object
     *
     * @return    void
     * @throws    PHPExcel_Exception
     */
    protected function storeData()
    {
        if ($this->currentCellIsDirty && !empty($this->currentObjectID)) {
            $this->currentObject->detach();

            if (!$this->DBHandle->queryExec("INSERT OR REPLACE INTO kvp_".$this->TableName." VALUES('".$this->currentObjectID."','".sqlite_escape_string(serialize($this->currentObject))."')")) {
                throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError()));
            }
            $this->currentCellIsDirty = false;
        }
        $this->currentObjectID = $this->currentObject = null;
    }

    /**
     * Add or Update a cell in cache identified by coordinate address
     *
     * @param    string            $pCoord        Coordinate address of the cell to update
     * @param    PHPExcel_Cell    $cell        Cell to update
     * @return    PHPExcel_Cell
     * @throws    PHPExcel_Exception
     */
    public function addCacheData($pCoord, PHPExcel_Cell $cell)
    {
        if (($pCoord !== $this->currentObjectID) && ($this->currentObjectID !== null)) {
            $this->storeData();
        }

        $this->currentObjectID = $pCoord;
        $this->currentObject = $cell;
        $this->currentCellIsDirty = true;

        return $cell;
    }

    /**
     * Get cell at a specific coordinate
     *
     * @param     string             $pCoord        Coordinate of the cell
     * @throws     PHPExcel_Exception
     * @return     PHPExcel_Cell     Cell that was found, or null if not found
     */
    public function getCacheData($pCoord)
    {
        if ($pCoord === $this->currentObjectID) {
            return $this->currentObject;
        }
        $this->storeData();

        $query = "SELECT value FROM kvp_".$this->TableName." WHERE id='".$pCoord."'";
        $cellResultSet = $this->DBHandle->query($query, SQLITE_ASSOC);
        if ($cellResultSet === false) {
            throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError()));
        } elseif ($cellResultSet->numRows() == 0) {
            //    Return null if requested entry doesn't exist in cache
            return null;
        }

        //    Set current entry to the requested entry
        $this->currentObjectID = $pCoord;

        $cellResult = $cellResultSet->fetchSingle();
        $this->currentObject = unserialize($cellResult);
        //    Re-attach this as the cell's parent
        $this->currentObject->attach($this);

        //    Return requested entry
        return $this->currentObject;
    }

    /**
     * Is a value set for an indexed cell?
     *
     * @param    string        $pCoord        Coordinate address of the cell to check
     * @return    boolean
     */
    public function isDataSet($pCoord)
    {
        if ($pCoord === $this->currentObjectID) {
            return true;
        }

        //    Check if the requested entry exists in the cache
        $query = "SELECT id FROM kvp_".$this->TableName." WHERE id='".$pCoord."'";
        $cellResultSet = $this->DBHandle->query($query, SQLITE_ASSOC);
        if ($cellResultSet === false) {
            throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError()));
        } elseif ($cellResultSet->numRows() == 0) {
            //    Return null if requested entry doesn't exist in cache
            return false;
        }
        return true;
    }

    /**
     * Delete a cell in cache identified by coordinate address
     *
     * @param    string            $pCoord        Coordinate address of the cell to delete
     * @throws    PHPExcel_Exception
     */
    public function deleteCacheData($pCoord)
    {
        if ($pCoord === $this->currentObjectID) {
            $this->currentObject->detach();
            $this->currentObjectID = $this->currentObject = null;
        }

        //    Check if the requested entry exists in the cache
        $query = "DELETE FROM kvp_".$this->TableName." WHERE id='".$pCoord."'";
        if (!$this->DBHandle->queryExec($query)) {
            throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError()));
        }

        $this->currentCellIsDirty = false;
    }

    /**
     * Move a cell object from one address to another
     *
     * @param    string        $fromAddress    Current address of the cell to move
     * @param    string        $toAddress        Destination address of the cell to move
     * @return    boolean
     */
    public function moveCell($fromAddress, $toAddress)
    {
        if ($fromAddress === $this->currentObjectID) {
            $this->currentObjectID = $toAddress;
        }

        $query = "DELETE FROM kvp_".$this->TableName." WHERE id='".$toAddress."'";
        $result = $this->DBHandle->exec($query);
        if ($result === false) {
            throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg());
        }

        $query = "UPDATE kvp_".$this->TableName." SET id='".$toAddress."' WHERE id='".$fromAddress."'";
        $result = $this->DBHandle->exec($query);
        if ($result === false) {
            throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg());
        }

        return true;
    }

    /**
     * Get a list of all cell addresses currently held in cache
     *
     * @return    string[]
     */
    public function getCellList()
    {
        if ($this->currentObjectID !== null) {
            $this->storeData();
        }

        $query = "SELECT id FROM kvp_".$this->TableName;
        $cellIdsResult = $this->DBHandle->unbufferedQuery($query, SQLITE_ASSOC);
        if ($cellIdsResult === false) {
            throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError()));
        }

        $cellKeys = array();
        foreach ($cellIdsResult as $row) {
            $cellKeys[] = $row['id'];
        }

        return $cellKeys;
    }

    /**
     * Clone the cell collection
     *
     * @param    PHPExcel_Worksheet    $parent        The new worksheet
     * @return    void
     */
    public function copyCellCollection(PHPExcel_Worksheet $parent)
    {
        $this->currentCellIsDirty;
        $this->storeData();

        //    Get a new id for the new table name
        $tableName = str_replace('.', '_', $this->getUniqueID());
        if (!$this->DBHandle->queryExec('CREATE TABLE kvp_'.$tableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)
            AS SELECT * FROM kvp_'.$this->TableName)
        ) {
            throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError()));
        }

        //    Copy the existing cell cache file
        $this->TableName = $tableName;
    }

    /**
     * Clear the cell collection and disconnect from our parent
     *
     * @return    void
     */
    public function unsetWorksheetCells()
    {
        if (!is_null($this->currentObject)) {
            $this->currentObject->detach();
            $this->currentObject = $this->currentObjectID = null;
        }
        //    detach ourself from the worksheet, so that it can then delete this object successfully
        $this->parent = null;

        //    Close down the temporary cache file
        $this->__destruct();
    }

    /**
     * Initialise this new cell collection
     *
     * @param    PHPExcel_Worksheet    $parent        The worksheet for this cell collection
     */
    public function __construct(PHPExcel_Worksheet $parent)
    {
        parent::__construct($parent);
        if (is_null($this->DBHandle)) {
            $this->TableName = str_replace('.', '_', $this->getUniqueID());
            $_DBName = ':memory:';

            $this->DBHandle = new SQLiteDatabase($_DBName);
            if ($this->DBHandle === false) {
                throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError()));
            }
            if (!$this->DBHandle->queryExec('CREATE TABLE kvp_'.$this->TableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)')) {
                throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError()));
            }
        }
    }

    /**
     * Destroy this cell collection
     */
    public function __destruct()
    {
        if (!is_null($this->DBHandle)) {
            $this->DBHandle->queryExec('DROP TABLE kvp_'.$this->TableName);
        }
        $this->DBHandle = null;
    }

    /**
     * Identify whether the caching method is currently available
     * Some methods are dependent on the availability of certain extensions being enabled in the PHP build
     *
     * @return    boolean
     */
    public static function cacheMethodIsAvailable()
    {
        if (!function_exists('sqlite_open')) {
            return false;
        }

        return true;
    }
}

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