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MockSyncCollection.php
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MockSyncCollection.php
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<?php
namespace Sabre\DAV\Sync;
use Sabre\DAV;
/**
* This mocks a ISyncCollection, for unittesting.
*
* This object behaves the same as SimpleCollection. Call addChange to update
* the 'changelog' that this class uses for the collection.
*
* @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class MockSyncCollection extends DAV\SimpleCollection implements ISyncCollection {
public $changeLog = [];
public $token = null;
/**
* This method returns the current sync-token for this collection.
* This can be any string.
*
* If null is returned from this function, the plugin assumes there's no
* sync information available.
*
* @return string|null
*/
public function getSyncToken() {
// Will be 'null' in the first round, and will increment ever after.
return $this->token;
}
public function addChange(array $added, array $modified, array $deleted) {
$this->token++;
$this->changeLog[$this->token] = [
'added' => $added,
'modified' => $modified,
'deleted' => $deleted,
];
}
/**
* The getChanges method returns all the changes that have happened, since
* the specified syncToken and the current collection.
*
* This function should return an array, such as the following:
*
* array(
* 'syncToken' => 'The current synctoken',
* 'modified' => array(
* 'new.txt',
* ),
* 'deleted' => array(
* 'foo.php.bak',
* 'old.txt'
* )
* );
*
* The syncToken property should reflect the *current* syncToken of the
* collection, as reported getSyncToken(). This is needed here too, to
* ensure the operation is atomic.
*
* If the syncToken is specified as null, this is an initial sync, and all
* members should be reported.
*
* The modified property is an array of nodenames that have changed since
* the last token.
*
* The deleted property is an array with nodenames, that have been deleted
* from collection.
*
* The second argument is basically the 'depth' of the report. If it's 1,
* you only have to report changes that happened only directly in immediate
* descendants. If it's 2, it should also include changes from the nodes
* below the child collections. (grandchildren)
*
* The third (optional) argument allows a client to specify how many
* results should be returned at most. If the limit is not specified, it
* should be treated as infinite.
*
* If the limit (infinite or not) is higher than you're willing to return,
* you should throw a Sabre\DAV\Exception\TooMuchMatches() exception.
*
* If the syncToken is expired (due to data cleanup) or unknown, you must
* return null.
*
* The limit is 'suggestive'. You are free to ignore it.
*
* @param string $syncToken
* @param int $syncLevel
* @param int $limit
* @return array
*/
public function getChanges($syncToken, $syncLevel, $limit = null) {
// This is an initial sync
if (is_null($syncToken)) {
return [
'added' => array_map(
function($item) {
return $item->getName();
}, $this->getChildren()
),
'modified' => [],
'deleted' => [],
'syncToken' => $this->getSyncToken(),
];
}
if (!is_int($syncToken) && !ctype_digit($syncToken)) {
return null;
}
if (is_null($this->token)) return null;
$added = [];
$modified = [];
$deleted = [];
foreach($this->changeLog as $token=>$change) {
if ($token > $syncToken) {
$added = array_merge($added, $change['added']);
$modified = array_merge($modified, $change['modified']);
$deleted = array_merge($deleted, $change['deleted']);
if ($limit) {
// If there's a limit, we may need to cut things off.
// This alghorithm is weird and stupid, but it works.
$left = $limit - (count($modified) + count($deleted));
if ($left>0) continue;
if ($left===0) break;
if ($left<0) {
$modified = array_slice($modified, 0, $left);
}
$left = $limit - (count($modified) + count($deleted));
if ($left===0) break;
if ($left<0) {
$deleted = array_slice($deleted, 0, $left);
}
break;
}
}
}
return array(
'syncToken' => $this->token,
'added' => $added,
'modified' => $modified,
'deleted' => $deleted,
);
}
}

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