Cache::save() - Code Metrics - owncloud/mail - Measure and Improve Code Quality continuously with Scrutinizer

Cache::save() C
last analyzed 2016-09-27 10:48 UTC

↳ Parent: Cache

Complexity

Conditions	11
Paths	13

Size

Total Lines	46
Code Lines	28

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	46
rs	5.2653
c	0
b	0
f	0
cc	11
eloc	28
nc	13
nop	0

How to fix Complexity

<?php

/**
 * @author Lukas Reschke <[email protected]>
 * @author Thomas Müller <[email protected]>
 *
 * Mail
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\Mail\Cache;

use Horde_Imap_Client_Cache_Backend;
use Horde_Imap_Client_Exception;
use InvalidArgumentException;

/**
 * Class UserCache
 *
 * This class is inspired by Horde_Imap_Client_Cache_Backend_Cache of the Horde Project
 *
 * @package OCA\Mail\Cache
 */
class Cache extends Horde_Imap_Client_Cache_Backend
{
	/** Cache structure version. */
	const VERSION = 3;

	/**
	 * The cache object.
	 *
	 * @var \OCP\ICache
	 */
	protected $_cache;

	/**
	 * The working data for the current pageload.  All changes take place to
	 * this data.
	 *
	 * @var array
	 */
	protected $_data = array();

	/**
	 * The list of cache slices loaded.
	 *
	 * @var array
	 */
	protected $_loaded = array();

	/**
	 * The mapping of UIDs to slices.
	 *
	 * @var array
	 */
	protected $_slicemap = array();

	/**
	 * The list of items to update:
	 *   - add: (array) List of IDs that were added.
	 *   - slice: (array) List of slices that were modified.
	 *   - slicemap: (boolean) Was slicemap info changed?
	 *
	 * @var array
	 */
	protected $_update = array();

	/**
	 * Constructor.
	 *
	 * @param array $params  Configuration parameters:
	 */
	public function __construct(array $params = array())
	{
		// Default parameters.
		$params = array_merge(array(
			'lifetime' => 604800,
			'slicesize' => 50
		), array_filter($params));

		if (!isset($params['cacheob'])) {
			throw new InvalidArgumentException('Missing cacheob parameter.');
		}

		foreach (array('lifetime', 'slicesize') as $val) {
			$params[$val] = intval($params[$val]);
		}

		parent::__construct($params);
	}

	/**
	 * Initialization tasks.
	 */
	protected function _initOb()
	{
		$this->_cache = $this->_params['cacheob'];
		register_shutdown_function(array($this, 'save'));
	}

	/**
	 * Updates the cache.
	 */
	public function save()
	{
		$lifetime = $this->_params['lifetime'];

		foreach ($this->_update as $mbox => $val) {
			$s = &$this->_slicemap[$mbox];

			if (!empty($val['add'])) {
				if ($s['c'] <= $this->_params['slicesize']) {
					$val['slice'][] = $s['i'];
					$this->_loadSlice($mbox, $s['i']);
				}
				$val['slicemap'] = true;

				foreach (array_keys(array_flip($val['add'])) as $uid) {
					if ($s['c']++ > $this->_params['slicesize']) {
						$s['c'] = 0;
						$val['slice'][] = ++$s['i'];
						$this->_loadSlice($mbox, $s['i']);
					}
					$s['s'][$uid] = $s['i'];
				}
			}

			if (!empty($val['slice'])) {
				$d = &$this->_data[$mbox];
				$val['slicemap'] = true;

				foreach (array_keys(array_flip($val['slice'])) as $slice) {
					$data = array();
					foreach (array_keys($s['s'], $slice) as $uid) {
						$data[$uid] = is_array($d[$uid])
							? serialize($d[$uid])
							: $d[$uid];
					}
					$this->_cache->set($this->_getCid($mbox, $slice), serialize($data), $lifetime);
				}
			}

			if (!empty($val['slicemap'])) {
				$this->_cache->set($this->_getCid($mbox, 'slicemap'), serialize($s), $lifetime);
			}
		}

		$this->_update = array();
	}

	/** {@inheritDoc} */
	public function get($mailbox, $uids, $fields, $uidvalid)
	{
		$ret = array();
		$this->_loadUids($mailbox, $uids, $uidvalid);

		if (empty($this->_data[$mailbox])) {
			return $ret;
		}

		if (!empty($fields)) {
			$fields = array_flip($fields);
		}
		$ptr = &$this->_data[$mailbox];

		foreach (array_intersect($uids, array_keys($ptr)) as $val) {
			if (is_string($ptr[$val])) {
				$ptr[$val] = @unserialize($ptr[$val]);
			}

			$ret[$val] = (empty($fields) || empty($ptr[$val]))
				? $ptr[$val]
				: array_intersect_key($ptr[$val], $fields);
		}

		return $ret;
	}

	/** {@inheritDoc} */
	public function getCachedUids($mailbox, $uidvalid)
	{
		$this->_loadSliceMap($mailbox, $uidvalid);
		return array_unique(array_merge(
			array_keys($this->_slicemap[$mailbox]['s']),
			(isset($this->_update[$mailbox]) ? $this->_update[$mailbox]['add'] : array())
		));
	}

	/** {@inheritDoc} */
	public function set($mailbox, $data, $uidvalid)
	{
		$update = array_keys($data);

		try {
			$this->_loadUids($mailbox, $update, $uidvalid);
		} catch (Horde_Imap_Client_Exception $e) {

			// Ignore invalidity - just start building the new cache
		}

		$d = &$this->_data[$mailbox];
		$s = &$this->_slicemap[$mailbox]['s'];
		$add = $updated = array();

		foreach ($data as $k => $v) {
			if (isset($d[$k])) {
				if (is_string($d[$k])) {
					$d[$k] = @unserialize($d[$k]);
				}
				$d[$k] = is_array($d[$k])
					? array_merge($d[$k], $v)
					: $v;
				if (isset($s[$k])) {
					$updated[$s[$k]] = true;
				}
			} else {
				$d[$k] = $v;
				$add[] = $k;
			}
		}

		$this->_toUpdate($mailbox, 'add', $add);
		$this->_toUpdate($mailbox, 'slice', array_keys($updated));
	}

	/** {@inheritDoc} */
	public function getMetaData($mailbox, $uidvalid, $entries)
	{
		$this->_loadSliceMap($mailbox, $uidvalid);

		return empty($entries)
			? $this->_slicemap[$mailbox]['d']
			: array_intersect_key($this->_slicemap[$mailbox]['d'], array_flip($entries));
	}

	/** {@inheritDoc} */
	public function setMetaData($mailbox, $data)
	{
		$this->_loadSliceMap($mailbox, isset($data['uidvalid']) ? $data['uidvalid'] : null);
		$this->_slicemap[$mailbox]['d'] = array_merge($this->_slicemap[$mailbox]['d'], $data);
		$this->_toUpdate($mailbox, 'slicemap', true);
	}

	/** {@inheritDoc} */
	public function deleteMsgs($mailbox, $uids)
	{
		$this->_loadSliceMap($mailbox);

		$slicemap = &$this->_slicemap[$mailbox];
		$deleted = array_intersect_key($slicemap['s'], array_flip($uids));

		if (isset($this->_update[$mailbox])) {
			$this->_update[$mailbox]['add'] = array_diff(
				$this->_update[$mailbox]['add'],
				$uids
			);
		}

		if (empty($deleted)) {
			return;
		}

		$this->_loadUids($mailbox, array_keys($deleted));
		$d = &$this->_data[$mailbox];

		foreach (array_keys($deleted) as $id) {
			unset($d[$id], $slicemap['s'][$id]);
		}

		foreach (array_unique($deleted) as $slice) {
			/* Get rid of slice if less than 10% of capacity. */
			if (($slice != $slicemap['i']) &&
				($slice_uids = array_keys($slicemap['s'], $slice)) &&
				($this->_params['slicesize'] * 0.1) > count($slice_uids)) {
				$this->_toUpdate($mailbox, 'add', $slice_uids);
				$this->_cache->remove($this->_getCid($mailbox, $slice));
				foreach ($slice_uids as $val) {
					unset($slicemap['s'][$val]);
				}
			} else {
				$this->_toUpdate($mailbox, 'slice', array($slice));
			}
		}
	}

	/** {@inheritDoc} */
	public function deleteMailbox($mailbox)
	{
		$this->_loadSliceMap($mailbox);
		$this->_deleteMailbox($mailbox);
	}

	/** {@inheritDoc} */
	public function clear($lifetime)
	{
		$this->_cache->clear();
		$this->_data = $this->_loaded = $this->_slicemap = $this->_update = array();
	}

	/**
	 * Create the unique ID used to store the data in the cache.
	 *
	 * @param string $mailbox  The mailbox to cache.
	 * @param string $slice    The cache slice.
	 *
	 * @return string  The cache ID.
	 */
	protected function _getCid($mailbox, $slice)
	{
		return implode('|', array(
			'horde_imap_client',
			$this->_params['username'],
			$mailbox,
			$this->_params['hostspec'],
			$this->_params['port'],
			$slice,
			self::VERSION
		));
	}

	/**
	 * Delete a mailbox from the cache.
	 *
	 * @param string $mbox  The mailbox to delete.
	 */
	protected function _deleteMailbox($mbox)
	{
		foreach (array_merge(array_keys(array_flip($this->_slicemap[$mbox]['s'])), array('slicemap')) as $slice) {
			$cid = $this->_getCid($mbox, $slice);
			$this->_cache->remove($cid);
			unset($this->_loaded[$cid]);
		}

		unset(
		$this->_data[$mbox],
		$this->_slicemap[$mbox],
		$this->_update[$mbox]
		);
	}

	/**
	 * Load UIDs by regenerating from the cache.
	 *
	 * @param string $mailbox    The mailbox to load.
	 * @param array $uids        The UIDs to load.
	 * @param integer $uidvalid  The IMAP uidvalidity value of the mailbox.
	 */
	protected function _loadUids($mailbox, $uids, $uidvalid = null)
	{
		if (!isset($this->_data[$mailbox])) {
			$this->_data[$mailbox] = array();
		}

		$this->_loadSliceMap($mailbox, $uidvalid);

		if (!empty($uids)) {
			foreach (array_unique(array_intersect_key($this->_slicemap[$mailbox]['s'], array_flip($uids))) as $slice) {
				$this->_loadSlice($mailbox, $slice);
			}
		}
	}

	/**
	 * Load UIDs from a cache slice.
	 *
	 * @param string $mailbox  The mailbox to load.
	 * @param integer $slice   The slice to load.
	 */
	protected function _loadSlice($mailbox, $slice)
	{
		$cache_id = $this->_getCid($mailbox, $slice);

		if (!empty($this->_loaded[$cache_id])) {
			return;
		}

		if ((($data = $this->_cache->get($cache_id, 0)) !== false) &&
			($data = @unserialize($data)) &&
			is_array($data)) {
			$this->_data[$mailbox] += $data;
			$this->_loaded[$cache_id] = true;
		} else {
			$ptr = &$this->_slicemap[$mailbox];

			// Slice data is corrupt; remove from slicemap.
			foreach (array_keys($ptr['s'], $slice) as $val) {
				unset($ptr['s'][$val]);
			}

			if ($slice == $ptr['i']) {
				$ptr['c'] = 0;
			}
		}
	}

	/**
	 * Load the slicemap for a given mailbox.  The slicemap contains
	 * the uidvalidity information, the UIDs->slice lookup table, and any
	 * metadata that needs to be saved for the mailbox.
	 *
	 * @param string $mailbox    The mailbox.
	 * @param integer $uidvalid  The IMAP uidvalidity value of the mailbox.
	 */
	protected function _loadSliceMap($mailbox, $uidvalid = null)
	{
		if (!isset($this->_slicemap[$mailbox]) &&
			(($data = $this->_cache->get($this->_getCid($mailbox, 'slicemap'), 0)) !== false) &&
			($slice = @unserialize($data)) &&
			is_array($slice)) {
			$this->_slicemap[$mailbox] = $slice;
		}

		if (isset($this->_slicemap[$mailbox])) {
			$ptr = &$this->_slicemap[$mailbox];
			if (is_null($ptr['d']['uidvalid'])) {
				$ptr['d']['uidvalid'] = $uidvalid;
				return;
			} elseif (!is_null($uidvalid) &&
				($ptr['d']['uidvalid'] != $uidvalid)) {
				$this->_deleteMailbox($mailbox);
			} else {
				return;
			}
		}

		$this->_slicemap[$mailbox] = array(
			// Tracking count for purposes of determining slices
			'c' => 0,
			// Metadata storage
			// By default includes UIDVALIDITY of mailbox.
			'd' => array('uidvalid' => $uidvalid),
			// The ID of the last slice.
			'i' => 0,
			// The slice list.
			's' => array()
		);
	}

	/**
	 * Add update entry for a mailbox.
	 *
	 * @param string $mailbox  The mailbox.
	 * @param string $type     'add', 'slice', or 'slicemap'.
	 * @param mixed $data      The data to update.
	 */
	protected function _toUpdate($mailbox, $type, $data)
	{
		if (!isset($this->_update[$mailbox])) {
			$this->_update[$mailbox] = array(
				'add' => array(),
				'slice' => array()
			);
		}

		$this->_update[$mailbox][$type] = ($type == 'slicemap')
			? $data
			: array_merge($this->_update[$mailbox][$type], $data);
	}

	/* Serializable methods. */

	/**
	 */
	public function serialize()
	{
		$this->save();
		return parent::serialize();
	}

}


1			<?php
2
3			/**
4			* @author Lukas Reschke <[email protected]>
5			* @author Thomas Müller <[email protected]>
6			*
7			* Mail
8			*
9			* This code is free software: you can redistribute it and/or modify
10			* it under the terms of the GNU Affero General Public License, version 3,
11			* as published by the Free Software Foundation.
12			*
13			* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU Affero General Public License for more details.
17			*
18			* You should have received a copy of the GNU Affero General Public License, version 3,
19			* along with this program. If not, see <http://www.gnu.org/licenses/>
20			*
21			*/
22
23			namespace OCA\Mail\Cache;
24
25			use Horde_Imap_Client_Cache_Backend;
26			use Horde_Imap_Client_Exception;
27			use InvalidArgumentException;
28
29			/**
30			* Class UserCache
31			*
32			* This class is inspired by Horde_Imap_Client_Cache_Backend_Cache of the Horde Project
33			*
34			* @package OCA\Mail\Cache
35			*/
36			class Cache extends Horde_Imap_Client_Cache_Backend
37			{
38			/** Cache structure version. */
39			const VERSION = 3;
40
41			/**
42			* The cache object.
43			*
44			* @var \OCP\ICache
45			*/
46			protected $_cache;
47
48			/**
49			* The working data for the current pageload. All changes take place to
50			* this data.
51			*
52			* @var array
53			*/
54			protected $_data = array();
55
56			/**
57			* The list of cache slices loaded.
58			*
59			* @var array
60			*/
61			protected $_loaded = array();
62
63			/**
64			* The mapping of UIDs to slices.
65			*
66			* @var array
67			*/
68			protected $_slicemap = array();
69
70			/**
71			* The list of items to update:
72			* - add: (array) List of IDs that were added.
73			* - slice: (array) List of slices that were modified.
74			* - slicemap: (boolean) Was slicemap info changed?
75			*
76			* @var array
77			*/
78			protected $_update = array();
79
80			/**
81			* Constructor.
82			*
83			* @param array $params Configuration parameters:
84			*/
85			public function __construct(array $params = array())
86			{
87			// Default parameters.
88			$params = array_merge(array(
89			'lifetime' => 604800,
90			'slicesize' => 50
91			), array_filter($params));
92
93			if (!isset($params['cacheob'])) {
94			throw new InvalidArgumentException('Missing cacheob parameter.');
95			}
96
97			foreach (array('lifetime', 'slicesize') as $val) {
98			$params[$val] = intval($params[$val]);
99			}
100
101			parent::__construct($params);
102			}
103
104			/**
105			* Initialization tasks.
106			*/
107			protected function _initOb()
108			{
109			$this->_cache = $this->_params['cacheob'];
110			register_shutdown_function(array($this, 'save'));
111			}
112
113			/**
114			* Updates the cache.
115			*/
116			public function save()
117			{
118			$lifetime = $this->_params['lifetime'];
119
120			foreach ($this->_update as $mbox => $val) {
121			$s = &$this->_slicemap[$mbox];
122
123			if (!empty($val['add'])) {
124			if ($s['c'] <= $this->_params['slicesize']) {
125			$val['slice'][] = $s['i'];
126			$this->_loadSlice($mbox, $s['i']);
127			}
128			$val['slicemap'] = true;
129
130			foreach (array_keys(array_flip($val['add'])) as $uid) {
131			if ($s['c']++ > $this->_params['slicesize']) {
132			$s['c'] = 0;
133			$val['slice'][] = ++$s['i'];
134			$this->_loadSlice($mbox, $s['i']);
135			}
136			$s['s'][$uid] = $s['i'];
137			}
138			}
139
140			if (!empty($val['slice'])) {
141			$d = &$this->_data[$mbox];
142			$val['slicemap'] = true;
143
144			foreach (array_keys(array_flip($val['slice'])) as $slice) {
145			$data = array();
146			foreach (array_keys($s['s'], $slice) as $uid) {
147			$data[$uid] = is_array($d[$uid])
148			? serialize($d[$uid])
149			: $d[$uid];
150			}
151			$this->_cache->set($this->_getCid($mbox, $slice), serialize($data), $lifetime);
152			}
153			}
154
155			if (!empty($val['slicemap'])) {
156			$this->_cache->set($this->_getCid($mbox, 'slicemap'), serialize($s), $lifetime);
157			}
158			}
159
160			$this->_update = array();
161			}
162
163			/** {@inheritDoc} */
164			public function get($mailbox, $uids, $fields, $uidvalid)
165			{
166			$ret = array();
167			$this->_loadUids($mailbox, $uids, $uidvalid);
168
169			if (empty($this->_data[$mailbox])) {
170			return $ret;
171			}
172
173			if (!empty($fields)) {
174			$fields = array_flip($fields);
175			}
176			$ptr = &$this->_data[$mailbox];
177
178			foreach (array_intersect($uids, array_keys($ptr)) as $val) {
179			if (is_string($ptr[$val])) {
180			$ptr[$val] = @unserialize($ptr[$val]);
181			}
182
183			$ret[$val] = (empty($fields) \|\| empty($ptr[$val]))
184			? $ptr[$val]
185			: array_intersect_key($ptr[$val], $fields);
186			}
187
188			return $ret;
189			}
190
191			/** {@inheritDoc} */
192			public function getCachedUids($mailbox, $uidvalid)
193			{
194			$this->_loadSliceMap($mailbox, $uidvalid);
195			return array_unique(array_merge(
196			array_keys($this->_slicemap[$mailbox]['s']),
197			(isset($this->_update[$mailbox]) ? $this->_update[$mailbox]['add'] : array())
198			));
199			}
200
201			/** {@inheritDoc} */
202			public function set($mailbox, $data, $uidvalid)
203			{
204			$update = array_keys($data);
205
206			try {
207			$this->_loadUids($mailbox, $update, $uidvalid);
208			} catch (Horde_Imap_Client_Exception $e) {
			0 ignored issues – show Bug introduced 2015-11-21 15:04 UTC by Report Bug Copy Issue Report The class `Horde_Imap_Client_Exception` does not exist. Is this class maybe located in a folder that is not analyzed, or in a newer version of your dependencies than listed in your composer.lock/composer.json? Loading history...
209			// Ignore invalidity - just start building the new cache
210			}
211
212			$d = &$this->_data[$mailbox];
213			$s = &$this->_slicemap[$mailbox]['s'];
214			$add = $updated = array();
215
216			foreach ($data as $k => $v) {
217			if (isset($d[$k])) {
218			if (is_string($d[$k])) {
219			$d[$k] = @unserialize($d[$k]);
220			}
221			$d[$k] = is_array($d[$k])
222			? array_merge($d[$k], $v)
223			: $v;
224			if (isset($s[$k])) {
225			$updated[$s[$k]] = true;
226			}
227			} else {
228			$d[$k] = $v;
229			$add[] = $k;
230			}
231			}
232
233			$this->_toUpdate($mailbox, 'add', $add);
234			$this->_toUpdate($mailbox, 'slice', array_keys($updated));
235			}
236
237			/** {@inheritDoc} */
238			public function getMetaData($mailbox, $uidvalid, $entries)
239			{
240			$this->_loadSliceMap($mailbox, $uidvalid);
241
242			return empty($entries)
243			? $this->_slicemap[$mailbox]['d']
244			: array_intersect_key($this->_slicemap[$mailbox]['d'], array_flip($entries));
245			}
246
247			/** {@inheritDoc} */
248			public function setMetaData($mailbox, $data)
249			{
250			$this->_loadSliceMap($mailbox, isset($data['uidvalid']) ? $data['uidvalid'] : null);
251			$this->_slicemap[$mailbox]['d'] = array_merge($this->_slicemap[$mailbox]['d'], $data);
252			$this->_toUpdate($mailbox, 'slicemap', true);
253			}
254
255			/** {@inheritDoc} */
256			public function deleteMsgs($mailbox, $uids)
257			{
258			$this->_loadSliceMap($mailbox);
259
260			$slicemap = &$this->_slicemap[$mailbox];
261			$deleted = array_intersect_key($slicemap['s'], array_flip($uids));
262
263			if (isset($this->_update[$mailbox])) {
264			$this->_update[$mailbox]['add'] = array_diff(
265			$this->_update[$mailbox]['add'],
266			$uids
267			);
268			}
269
270			if (empty($deleted)) {
271			return;
272			}
273
274			$this->_loadUids($mailbox, array_keys($deleted));
275			$d = &$this->_data[$mailbox];
276
277			foreach (array_keys($deleted) as $id) {
278			unset($d[$id], $slicemap['s'][$id]);
279			}
280
281			foreach (array_unique($deleted) as $slice) {
282			/* Get rid of slice if less than 10% of capacity. */
283			if (($slice != $slicemap['i']) &&
284			($slice_uids = array_keys($slicemap['s'], $slice)) &&
285			($this->_params['slicesize'] * 0.1) > count($slice_uids)) {
286			$this->_toUpdate($mailbox, 'add', $slice_uids);
287			$this->_cache->remove($this->_getCid($mailbox, $slice));
288			foreach ($slice_uids as $val) {
289			unset($slicemap['s'][$val]);
290			}
291			} else {
292			$this->_toUpdate($mailbox, 'slice', array($slice));
293			}
294			}
295			}
296
297			/** {@inheritDoc} */
298			public function deleteMailbox($mailbox)
299			{
300			$this->_loadSliceMap($mailbox);
301			$this->_deleteMailbox($mailbox);
302			}
303
304			/** {@inheritDoc} */
305			public function clear($lifetime)
306			{
307			$this->_cache->clear();
308			$this->_data = $this->_loaded = $this->_slicemap = $this->_update = array();
309			}
310
311			/**
312			* Create the unique ID used to store the data in the cache.
313			*
314			* @param string $mailbox The mailbox to cache.
315			* @param string $slice The cache slice.
316			*
317			* @return string The cache ID.
318			*/
319			protected function _getCid($mailbox, $slice)
320			{
321			return implode('\|', array(
322			'horde_imap_client',
323			$this->_params['username'],
324			$mailbox,
325			$this->_params['hostspec'],
326			$this->_params['port'],
327			$slice,
328			self::VERSION
329			));
330			}
331
332			/**
333			* Delete a mailbox from the cache.
334			*
335			* @param string $mbox The mailbox to delete.
336			*/
337			protected function _deleteMailbox($mbox)
338			{
339			foreach (array_merge(array_keys(array_flip($this->_slicemap[$mbox]['s'])), array('slicemap')) as $slice) {
340			$cid = $this->_getCid($mbox, $slice);
341			$this->_cache->remove($cid);
342			unset($this->_loaded[$cid]);
343			}
344
345			unset(
346			$this->_data[$mbox],
347			$this->_slicemap[$mbox],
348			$this->_update[$mbox]
349			);
350			}
351
352			/**
353			* Load UIDs by regenerating from the cache.
354			*
355			* @param string $mailbox The mailbox to load.
356			* @param array $uids The UIDs to load.
357			* @param integer $uidvalid The IMAP uidvalidity value of the mailbox.
358			*/
359			protected function _loadUids($mailbox, $uids, $uidvalid = null)
360			{
361			if (!isset($this->_data[$mailbox])) {
362			$this->_data[$mailbox] = array();
363			}
364
365			$this->_loadSliceMap($mailbox, $uidvalid);
366
367			if (!empty($uids)) {
368			foreach (array_unique(array_intersect_key($this->_slicemap[$mailbox]['s'], array_flip($uids))) as $slice) {
369			$this->_loadSlice($mailbox, $slice);
370			}
371			}
372			}
373
374			/**
375			* Load UIDs from a cache slice.
376			*
377			* @param string $mailbox The mailbox to load.
378			* @param integer $slice The slice to load.
379			*/
380			protected function _loadSlice($mailbox, $slice)
381			{
382			$cache_id = $this->_getCid($mailbox, $slice);
383
384			if (!empty($this->_loaded[$cache_id])) {
385			return;
386			}
387
388			if ((($data = $this->_cache->get($cache_id, 0)) !== false) &&
389			($data = @unserialize($data)) &&
390			is_array($data)) {
391			$this->_data[$mailbox] += $data;
392			$this->_loaded[$cache_id] = true;
393			} else {
394			$ptr = &$this->_slicemap[$mailbox];
395
396			// Slice data is corrupt; remove from slicemap.
397			foreach (array_keys($ptr['s'], $slice) as $val) {
398			unset($ptr['s'][$val]);
399			}
400
401			if ($slice == $ptr['i']) {
402			$ptr['c'] = 0;
403			}
404			}
405			}
406
407			/**
408			* Load the slicemap for a given mailbox. The slicemap contains
409			* the uidvalidity information, the UIDs->slice lookup table, and any
410			* metadata that needs to be saved for the mailbox.
411			*
412			* @param string $mailbox The mailbox.
413			* @param integer $uidvalid The IMAP uidvalidity value of the mailbox.
414			*/
415			protected function _loadSliceMap($mailbox, $uidvalid = null)
416			{
417			if (!isset($this->_slicemap[$mailbox]) &&
418			(($data = $this->_cache->get($this->_getCid($mailbox, 'slicemap'), 0)) !== false) &&
419			($slice = @unserialize($data)) &&
420			is_array($slice)) {
421			$this->_slicemap[$mailbox] = $slice;
422			}
423
424			if (isset($this->_slicemap[$mailbox])) {
425			$ptr = &$this->_slicemap[$mailbox];
426			if (is_null($ptr['d']['uidvalid'])) {
427			$ptr['d']['uidvalid'] = $uidvalid;
428			return;
429			} elseif (!is_null($uidvalid) &&
430			($ptr['d']['uidvalid'] != $uidvalid)) {
431			$this->_deleteMailbox($mailbox);
432			} else {
433			return;
434			}
435			}
436
437			$this->_slicemap[$mailbox] = array(
438			// Tracking count for purposes of determining slices
439			'c' => 0,
440			// Metadata storage
441			// By default includes UIDVALIDITY of mailbox.
442			'd' => array('uidvalid' => $uidvalid),
443			// The ID of the last slice.
444			'i' => 0,
445			// The slice list.
446			's' => array()
447			);
448			}
449
450			/**
451			* Add update entry for a mailbox.
452			*
453			* @param string $mailbox The mailbox.
454			* @param string $type 'add', 'slice', or 'slicemap'.
455			* @param mixed $data The data to update.
456			*/
457			protected function _toUpdate($mailbox, $type, $data)
458			{
459			if (!isset($this->_update[$mailbox])) {
460			$this->_update[$mailbox] = array(
461			'add' => array(),
462			'slice' => array()
463			);
464			}
465
466			$this->_update[$mailbox][$type] = ($type == 'slicemap')
467			? $data
468			: array_merge($this->_update[$mailbox][$type], $data);
469			}
470
471			/* Serializable methods. */
472
473			/**
474			*/
475			public function serialize()
476			{
477			$this->save();
478			return parent::serialize();
479			}
480
481			}
482

owncloud / mail

Cache::save() C last analyzed 2016-09-27 10:48 UTC

Complexity

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Duplication

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Cache::save() C
last analyzed 2016-09-27 10:48 UTC