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<?php
class GenericCollectionManager {
private $db;
// public $dataFolder = PATH.'/data/';
// public $collectionsFile = 'addressbooks/addressbooks.json';
// public $collectionsFolder = 'addressbooks/';
// public $collectionType = 'Addressbook';
// public $datafield = 'carddata';
// public function newCollection ($username, $uri, array $properties) {}
// public function newObject ($collectionId, $uri, $data, $extraData) {}
// public function newObjectUpdate ($collectionId, $uri, $data, $extraData) {}
public function __construct (JSONDB $database) {
$this->db = $database;
}
//
// Collections
//
public function collectionExists ($collectionId) {
return (!$this->getCollection($collectionId)) ? false : true;
}
public function getCollection ($collectionId) {
$result = $this->db->select('*')
->from($this->collectionsFile)
->where(['id' => $collectionId])
->get();
if (!isset($result[0])) return false;
return $result[0];
}
public function getCollections ($username) {
$result = $this->db->select('*')
->from($this->collectionsFile)
->where(['principaluri' => $username])
->get();
return $result;
}
public function getHighestCollectionId () {
$data = $this->db->select('id')
->from($this->collectionsFile)
->order_by('id', JSONDB::ASC)
->get();
return end($data)['id'];
}
public function createCollection ($username, $uri, array $properties) {
if(!preg_match('/^[\w-]+$/', $uri)) throw new Exception('URI contains not allowed characters.');
$collections = $this->getCollections($username);
foreach ($collections as $collection) {
if ($collection['uri'] == $uri) throw new Exception('An '.strtolower($this->collectionType).' with this URI already exist.');
}
$collection = $this->newCollection($username, $uri, $properties);
$this->db->insert($this->collectionsFile, $collection);
mkdir($this->dataFolder.$this->collectionsFolder.$collection['id']);
mkdir($this->dataFolder.$this->collectionsFolder.$collection['id'].'/data');
return $collection['id'];
}
public function updateCollection ($collectionId, $properties) {
if (!$this->exists($id)) throw new Exception($this->collectionType.' doesn\'t exist!');
$this->db->update($properties)
->from($this->collectionsFile)
->where(['id' => $collectionId])
->trigger();
$this->addChange($collectionId, '', 2);
}
public function deleteCollection ($collectionId) {
$this->db->delete()
->from($this->collectionsFile)
->where(['id' => $collectionId])
->trigger();
Helpers::delete($this->dataFolder.$this->collectionsFolder.$id);
}
//
// Objects
//
public function getHighestObjectId ($collectionId) {
$data = $this->db->select('id')
->from($this->collectionsFolder.$collectionId.'/objects.json')
->order_by('id', JSONDB::ASC)
->get();
return end($data)['id'];
}
public function getObject ($collectionId, $uri) {
$objects = $result = $this->db->select('*')
->from($this->collectionsFolder.$collectionId.'/objects.json')
->where(['uri' => $uri])
->get();
if (!isset($objects[0])) return false;
$result = $objects[0];
$result[$this->datafield] = file_get_contents($this->dataFolder.$this->collectionsFolder.$collectionId.'/data/'.$objects[0]['uri']);
return $result;
}
public function getObjects ($collectionId) {
$objects = $this->db->select('*')
->from($this->collectionsFolder.$collectionId.'/objects.json')
->get();
$results = [];
foreach ($objects as $object) {
$results[] = get_object_vars($object);
}
return $results;
}
public function createObject ($collectionId, $uri, $data, $extraData = NULL) {
$object = $this->newObject($collectionId, $uri, $data, $extraData);
$this->db->insert($this->collectionsFolder.$collectionId.'/objects.json', $object);
file_put_contents($this->dataFolder.$this->collectionsFolder.$collectionId.'/data/'.$uri, $data);
$this->addChange($collectionId, $uri, 1);
return $object['etag'];
}
public function updateObject ($collectionId, $uri, $data, $extraData = NULL) {
$update = $this->newObjectUpdate($collectionId, $uri, $data, $extraData);
$this->db->update($update)
->from($this->collectionsFolder.$collectionId.'/objects.json')
->where(['uri' => $uri])
->trigger();
file_put_contents($this->dataFolder.$this->collectionsFolder.$collectionId.'/data/'.$uri, $data);
$this->addChange($collectionId, $uri, 2);
return $update['etag'];
}
public function deleteObject ($collectionId, $uri) {
$result = $this->db->delete()
->from($this->collectionsFolder.$collectionId.'/objects.json')
->where(['uri' => $uri])
->trigger();
unlink($this->dataFolder.$this->collectionsFolder.$collectionId.'/data/'.$uri);
$this->addChange($collectionId, $uri, 3);
return $result;
}
public function addChange ($collectionId, $uri, $operation) {
$synctoken = $this->getCollection($collectionId)['synctoken'];
$this->db->insert($this->collectionsFolder.$collectionId.'/changes.json', [
'synctoken' => $synctoken,
'operation' => $operation,
'uri' => $uri,
]);
$this->db->update(['synctoken' => $synctoken+1])
->from($this->collectionsFile)
->where(['id' => $collectionId])
->trigger();
}
public function getChanges ($collectionId, $syncToken, $syncLevel) {
$currentToken = $this->getCollection($collectionId)['synctoken'];
if (is_null($currentToken)) {
return null;
}
$result = [
'syncToken' => $currentToken,
'added' => [],
'modified' => [],
'deleted' => [],
];
if ($syncToken) {
$query = $this->db->select('*')
->from($this->collectionsFolder.$collectionId.'/changes.json')
->order_by('synctoken', JSONDB::ASC)
->get();
$changes = [];
foreach ($query as $data) {
if ($data['synctoken'] >= $syncToken) $changes[$data['uri']] = $data['operation'];
if ($data['synctoken'] < $currentToken) $changes[$data['uri']] = $data['operation'];
}
foreach ($changes as $uri => $operation) {
switch ($operation) {
case 1:
$result['added'][] = $uri;
break;
case 2:
$result['modified'][] = $uri;
break;
case 3:
$result['deleted'][] = $uri;
break;
}
}
} else {
$objects = $this->getObjects($collectionId);
foreach ($objects as $object) {
$result['added'][] = $object['uri'];
}
}
return $result;
}
}