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<?php /** * PHPExcel_CachedObjectStorage_SQLite3 * * 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_SQLite3 extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache { /** * Database table name * * @var string */ private $TableName = null; /** * Database handle * * @var resource */ private $DBHandle = null; /** * Prepared statement for a SQLite3 select query * * @var SQLite3Stmt */ private $selectQuery; /** * Prepared statement for a SQLite3 insert query * * @var SQLite3Stmt */ private $insertQuery; /** * Prepared statement for a SQLite3 update query * * @var SQLite3Stmt */ private $updateQuery; /** * Prepared statement for a SQLite3 delete query * * @var SQLite3Stmt */ private $deleteQuery; /** * Store cell data in cache for the current cell object if it's "dirty", * and the 'nullify' the current cell object * * @return void * @throws PHPExcel_Exception */ protected function storeData() { if ($this->currentCellIsDirty && !empty($this->currentObjectID)) { $this->currentObject->detach(); $this->insertQuery->bindValue('id', $this->currentObjectID, SQLITE3_TEXT); $this->insertQuery->bindValue('data', serialize($this->currentObject), SQLITE3_BLOB); $result = $this->insertQuery->execute(); if ($result === false) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } $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(); $this->selectQuery->bindValue('id', $pCoord, SQLITE3_TEXT); $cellResult = $this->selectQuery->execute(); if ($cellResult === false) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } $cellData = $cellResult->fetchArray(SQLITE3_ASSOC); if ($cellData === false) { // Return null if requested entry doesn't exist in cache return null; } // Set current entry to the requested entry $this->currentObjectID = $pCoord; $this->currentObject = unserialize($cellData['value']); // 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 $this->selectQuery->bindValue('id', $pCoord, SQLITE3_TEXT); $cellResult = $this->selectQuery->execute(); if ($cellResult === false) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } $cellData = $cellResult->fetchArray(SQLITE3_ASSOC); return ($cellData === false) ? false : 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 $this->deleteQuery->bindValue('id', $pCoord, SQLITE3_TEXT); $result = $this->deleteQuery->execute(); if ($result === false) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } $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; } $this->deleteQuery->bindValue('id', $toAddress, SQLITE3_TEXT); $result = $this->deleteQuery->execute(); if ($result === false) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } $this->updateQuery->bindValue('toid', $toAddress, SQLITE3_TEXT); $this->updateQuery->bindValue('fromid', $fromAddress, SQLITE3_TEXT); $result = $this->updateQuery->execute(); if ($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 = $this->DBHandle->query($query); if ($cellIdsResult === false) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } $cellKeys = array(); while ($row = $cellIdsResult->fetchArray(SQLITE3_ASSOC)) { $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->exec('CREATE TABLE kvp_'.$tableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB) AS SELECT * FROM kvp_'.$this->TableName) ) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } // 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:'; $this->DBHandle = new SQLite3($_DBName); if ($this->DBHandle === false) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } if (!$this->DBHandle->exec('CREATE TABLE kvp_'.$this->TableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)')) { throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); } } $this->selectQuery = $this->DBHandle->prepare("SELECT value FROM kvp_".$this->TableName." WHERE id = :id"); $this->insertQuery = $this->DBHandle->prepare("INSERT OR REPLACE INTO kvp_".$this->TableName." VALUES(:id,:data)"); $this->updateQuery = $this->DBHandle->prepare("UPDATE kvp_".$this->TableName." SET id=:toId WHERE id=:fromId"); $this->deleteQuery = $this->DBHandle->prepare("DELETE FROM kvp_".$this->TableName." WHERE id = :id"); } /** * Destroy this cell collection */ public function __destruct() { if (!is_null($this->DBHandle)) { $this->DBHandle->exec('DROP TABLE kvp_'.$this->TableName); $this->DBHandle->close(); } $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 (!class_exists('SQLite3', false)) { return false; } return true; } }
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