visualizer / vendor / phpoffice / phpexcel / Classes / PHPExcel / CachedObjectStorage / SQLite.php

SQLite.php in Visualizer – Tables & Charts Manager with Built-in AI Generator 3.0.3, at vendor/phpoffice/phpexcel/Classes/PHPExcel/CachedObjectStorage/SQLite.php

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1	<?php
2	/**
3	* PHPExcel
4	*
5	* Copyright (c) 2006 - 2014 PHPExcel
6	*
7	* This library is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU Lesser General Public
9	* License as published by the Free Software Foundation; either
10	* version 2.1 of the License, or (at your option) any later version.
11	*
12	* This library is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* Lesser General Public License for more details.
16	*
17	* You should have received a copy of the GNU Lesser General Public
18	* License along with this library; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20	*
21	* @category PHPExcel
22	* @package PHPExcel_CachedObjectStorage
23	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
24	* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
25	* @version ##VERSION##, ##DATE##
26	*/
27
28
29	/**
30	* PHPExcel_CachedObjectStorage_SQLite
31	*
32	* @category PHPExcel
33	* @package PHPExcel_CachedObjectStorage
34	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
35	*/
36	class PHPExcel_CachedObjectStorage_SQLite extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
37
38	/**
39	* Database table name
40	*
41	* @var string
42	*/
43	private $_TableName = null;
44
45	/**
46	* Database handle
47	*
48	* @var resource
49	*/
50	private $_DBHandle = null;
51
52	/**
53	* Store cell data in cache for the current cell object if it's "dirty",
54	* and the 'nullify' the current cell object
55	*
56	* @return void
57	* @throws PHPExcel_Exception
58	*/
59	protected function _storeData() {
60	if ($this->_currentCellIsDirty && !empty($this->_currentObjectID)) {
61	$this->_currentObject->detach();
62
63	if (!$this->_DBHandle->queryExec("INSERT OR REPLACE INTO kvp_".$this->_TableName." VALUES('".$this->_currentObjectID."','".sqlite_escape_string(serialize($this->_currentObject))."')"))
64	throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
65	$this->_currentCellIsDirty = false;
66	}
67	$this->_currentObjectID = $this->_currentObject = null;
68	} // function _storeData()
69
70
71	/**
72	* Add or Update a cell in cache identified by coordinate address
73	*
74	* @param string $pCoord Coordinate address of the cell to update
75	* @param PHPExcel_Cell $cell Cell to update
76	* @return PHPExcel_Cell
77	* @throws PHPExcel_Exception
78	*/
79	public function addCacheData($pCoord, PHPExcel_Cell $cell) {
80	if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) {
81	$this->_storeData();
82	}
83
84	$this->_currentObjectID = $pCoord;
85	$this->_currentObject = $cell;
86	$this->_currentCellIsDirty = true;
87
88	return $cell;
89	} // function addCacheData()
90
91
92	/**
93	* Get cell at a specific coordinate
94	*
95	* @param string $pCoord Coordinate of the cell
96	* @throws PHPExcel_Exception
97	* @return PHPExcel_Cell Cell that was found, or null if not found
98	*/
99	public function getCacheData($pCoord) {
100	if ($pCoord === $this->_currentObjectID) {
101	return $this->_currentObject;
102	}
103	$this->_storeData();
104
105	$query = "SELECT value FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
106	$cellResultSet = $this->_DBHandle->query($query,SQLITE_ASSOC);
107	if ($cellResultSet === false) {
108	throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
109	} elseif ($cellResultSet->numRows() == 0) {
110	// Return null if requested entry doesn't exist in cache
111	return null;
112	}
113
114	// Set current entry to the requested entry
115	$this->_currentObjectID = $pCoord;
116
117	$cellResult = $cellResultSet->fetchSingle();
118	$this->_currentObject = unserialize($cellResult);
119	// Re-attach this as the cell's parent
120	$this->_currentObject->attach($this);
121
122	// Return requested entry
123	return $this->_currentObject;
124	} // function getCacheData()
125
126
127	/**
128	* Is a value set for an indexed cell?
129	*
130	* @param string $pCoord Coordinate address of the cell to check
131	* @return boolean
132	*/
133	public function isDataSet($pCoord) {
134	if ($pCoord === $this->_currentObjectID) {
135	return true;
136	}
137
138	// Check if the requested entry exists in the cache
139	$query = "SELECT id FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
140	$cellResultSet = $this->_DBHandle->query($query,SQLITE_ASSOC);
141	if ($cellResultSet === false) {
142	throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
143	} elseif ($cellResultSet->numRows() == 0) {
144	// Return null if requested entry doesn't exist in cache
145	return false;
146	}
147	return true;
148	} // function isDataSet()
149
150
151	/**
152	* Delete a cell in cache identified by coordinate address
153	*
154	* @param string $pCoord Coordinate address of the cell to delete
155	* @throws PHPExcel_Exception
156	*/
157	public function deleteCacheData($pCoord) {
158	if ($pCoord === $this->_currentObjectID) {
159	$this->_currentObject->detach();
160	$this->_currentObjectID = $this->_currentObject = null;
161	}
162
163	// Check if the requested entry exists in the cache
164	$query = "DELETE FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
165	if (!$this->_DBHandle->queryExec($query))
166	throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
167
168	$this->_currentCellIsDirty = false;
169	} // function deleteCacheData()
170
171
172	/**
173	* Move a cell object from one address to another
174	*
175	* @param string $fromAddress Current address of the cell to move
176	* @param string $toAddress Destination address of the cell to move
177	* @return boolean
178	*/
179	public function moveCell($fromAddress, $toAddress) {
180	if ($fromAddress === $this->_currentObjectID) {
181	$this->_currentObjectID = $toAddress;
182	}
183
184	$query = "DELETE FROM kvp_".$this->_TableName." WHERE id='".$toAddress."'";
185	$result = $this->_DBHandle->exec($query);
186	if ($result === false)
187	throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
188
189	$query = "UPDATE kvp_".$this->_TableName." SET id='".$toAddress."' WHERE id='".$fromAddress."'";
190	$result = $this->_DBHandle->exec($query);
191	if ($result === false)
192	throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
193
194	return TRUE;
195	} // function moveCell()
196
197
198	/**
199	* Get a list of all cell addresses currently held in cache
200	*
201	* @return string[]
202	*/
203	public function getCellList() {
204	if ($this->_currentObjectID !== null) {
205	$this->_storeData();
206	}
207
208	$query = "SELECT id FROM kvp_".$this->_TableName;
209	$cellIdsResult = $this->_DBHandle->unbufferedQuery($query,SQLITE_ASSOC);
210	if ($cellIdsResult === false)
211	throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
212
213	$cellKeys = array();
214	foreach($cellIdsResult as $row) {
215	$cellKeys[] = $row['id'];
216	}
217
218	return $cellKeys;
219	} // function getCellList()
220
221
222	/**
223	* Clone the cell collection
224	*
225	* @param PHPExcel_Worksheet $parent The new worksheet
226	* @return void
227	*/
228	public function copyCellCollection(PHPExcel_Worksheet $parent) {
229	$this->_currentCellIsDirty;
230	$this->_storeData();
231
232	// Get a new id for the new table name
233	$tableName = str_replace('.','_',$this->_getUniqueID());
234	if (!$this->_DBHandle->queryExec('CREATE TABLE kvp_'.$tableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)
235	AS SELECT * FROM kvp_'.$this->_TableName))
236	throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
237
238	// Copy the existing cell cache file
239	$this->_TableName = $tableName;
240	} // function copyCellCollection()
241
242
243	/**
244	* Clear the cell collection and disconnect from our parent
245	*
246	* @return void
247	*/
248	public function unsetWorksheetCells() {
249	if(!is_null($this->_currentObject)) {
250	$this->_currentObject->detach();
251	$this->_currentObject = $this->_currentObjectID = null;
252	}
253	// detach ourself from the worksheet, so that it can then delete this object successfully
254	$this->_parent = null;
255
256	// Close down the temporary cache file
257	$this->__destruct();
258	} // function unsetWorksheetCells()
259
260
261	/**
262	* Initialise this new cell collection
263	*
264	* @param PHPExcel_Worksheet $parent The worksheet for this cell collection
265	*/
266	public function __construct(PHPExcel_Worksheet $parent) {
267	parent::__construct($parent);
268	if (is_null($this->_DBHandle)) {
269	$this->_TableName = str_replace('.','_',$this->_getUniqueID());
270	$_DBName = ':memory:';
271
272	$this->_DBHandle = new SQLiteDatabase($_DBName);
273	if ($this->_DBHandle === false)
274	throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
275	if (!$this->_DBHandle->queryExec('CREATE TABLE kvp_'.$this->_TableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)'))
276	throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
277	}
278	} // function __construct()
279
280
281	/**
282	* Destroy this cell collection
283	*/
284	public function __destruct() {
285	if (!is_null($this->_DBHandle)) {
286	$this->_DBHandle->queryExec('DROP TABLE kvp_'.$this->_TableName);
287	}
288	$this->_DBHandle = null;
289	} // function __destruct()
290
291
292	/**
293	* Identify whether the caching method is currently available
294	* Some methods are dependent on the availability of certain extensions being enabled in the PHP build
295	*
296	* @return boolean
297	*/
298	public static function cacheMethodIsAvailable() {
299	if (!function_exists('sqlite_open')) {
300	return false;
301	}
302
303	return true;
304	}
305
306	}
307