Initial Release of the calendar plugin

dav/SabreDAV/lib/Sabre/DAV/Locks/Backend/Abstract.php

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+<?php
+
+/**
+ * The Lock manager allows you to handle all file-locks centrally.
+ *
+ * This is an alternative approach to doing this on a per-node basis
+ *
+ * @package Sabre
+ * @subpackage DAV
+ * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
+ * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+abstract class Sabre_DAV_Locks_Backend_Abstract {
+
+    /**
+     * Returns a list of Sabre_DAV_Locks_LockInfo objects
+     *
+     * This method should return all the locks for a particular uri, including
+     * locks that might be set on a parent uri.
+     *
+     * If returnChildLocks is set to true, this method should also look for
+     * any locks in the subtree of the uri for locks.
+     *
+     * @param string $uri
+     * @param bool $returnChildLocks
+     * @return array
+     */
+    abstract function getLocks($uri, $returnChildLocks);
+
+    /**
+     * Locks a uri
+     *
+     * @param string $uri
+     * @param Sabre_DAV_Locks_LockInfo $lockInfo
+     * @return bool
+     */
+    abstract function lock($uri,Sabre_DAV_Locks_LockInfo $lockInfo);
+
+    /**
+     * Removes a lock from a uri
+     *
+     * @param string $uri
+     * @param Sabre_DAV_Locks_LockInfo $lockInfo
+     * @return bool
+     */
+    abstract function unlock($uri,Sabre_DAV_Locks_LockInfo $lockInfo);
+
+}
+

dav/SabreDAV/lib/Sabre/DAV/Locks/Backend/FS.php

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+<?php
+
+/**
+ * This Lock Backend stores all its data in the filesystem in separate file per
+ * node.
+ *
+ * This Lock Manager is now deprecated. It has a bug that allows parent
+ * collections to be deletes when children deeper in the tree are locked.
+ *
+ * This also means that using this backend means you will not pass the Neon
+ * Litmus test.
+ *
+ * You are recommended to use either the PDO or the File backend instead.
+ *
+ * @package Sabre
+ * @subpackage DAV
+ * @deprecated
+ * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
+ * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+class Sabre_DAV_Locks_Backend_FS extends Sabre_DAV_Locks_Backend_Abstract {
+
+    /**
+     * The default data directory
+     *
+     * @var string
+     */
+    private $dataDir;
+
+    public function __construct($dataDir) {
+
+        $this->dataDir = $dataDir;
+
+    }
+
+    protected function getFileNameForUri($uri) {
+
+        return $this->dataDir . '/sabredav_' . md5($uri) . '.locks';
+
+    }
+
+
+    /**
+     * Returns a list of Sabre_DAV_Locks_LockInfo objects
+     *
+     * This method should return all the locks for a particular uri, including
+     * locks that might be set on a parent uri.
+     *
+     * If returnChildLocks is set to true, this method should also look for
+     * any locks in the subtree of the uri for locks.
+     *
+     * @param string $uri
+     * @param bool $returnChildLocks
+     * @return array
+     */
+    public function getLocks($uri, $returnChildLocks) {
+
+        $lockList = array();
+        $currentPath = '';
+
+        foreach(explode('/',$uri) as $uriPart) {
+
+            // weird algorithm that can probably be improved, but we're traversing the path top down
+            if ($currentPath) $currentPath.='/';
+            $currentPath.=$uriPart;
+
+            $uriLocks = $this->getData($currentPath);
+
+            foreach($uriLocks as $uriLock) {
+
+                // Unless we're on the leaf of the uri-tree we should ignore locks with depth 0
+                if($uri==$currentPath || $uriLock->depth!=0) {
+                    $uriLock->uri = $currentPath;
+                    $lockList[] = $uriLock;
+                }
+
+            }
+
+        }
+
+        // Checking if we can remove any of these locks
+        foreach($lockList as $k=>$lock) {
+            if (time() > $lock->timeout + $lock->created) unset($lockList[$k]);
+        }
+        return $lockList;
+
+    }
+
+    /**
+     * Locks a uri
+     *
+     * @param string $uri
+     * @param Sabre_DAV_Locks_LockInfo $lockInfo
+     * @return bool
+     */
+    public function lock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
+
+        // We're making the lock timeout 30 minutes
+        $lockInfo->timeout = 1800;
+        $lockInfo->created = time();
+
+        $locks = $this->getLocks($uri,false);
+        foreach($locks as $k=>$lock) {
+            if ($lock->token == $lockInfo->token) unset($locks[$k]);
+        }
+        $locks[] = $lockInfo;
+        $this->putData($uri,$locks);
+        return true;
+
+    }
+
+    /**
+     * Removes a lock from a uri
+     *
+     * @param string $uri
+     * @param Sabre_DAV_Locks_LockInfo $lockInfo
+     * @return bool
+     */
+    public function unlock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
+
+        $locks = $this->getLocks($uri,false);
+        foreach($locks as $k=>$lock) {
+
+            if ($lock->token == $lockInfo->token) {
+
+                unset($locks[$k]);
+                $this->putData($uri,$locks);
+                return true;
+
+            }
+        }
+        return false;
+
+    }
+
+    /**
+     * Returns the stored data for a uri
+     *
+     * @param string $uri
+     * @return array
+     */
+    protected function getData($uri) {
+
+        $path = $this->getFilenameForUri($uri);
+        if (!file_exists($path)) return array();
+
+        // opening up the file, and creating a shared lock
+        $handle = fopen($path,'r');
+        flock($handle,LOCK_SH);
+        $data = '';
+
+        // Reading data until the eof
+        while(!feof($handle)) {
+            $data.=fread($handle,8192);
+        }
+
+        // We're all good
+        fclose($handle);
+
+        // Unserializing and checking if the resource file contains data for this file
+        $data = unserialize($data);
+        if (!$data) return array();
+        return $data;
+
+    }
+
+    /**
+     * Updates the lock information
+     *
+     * @param string $uri
+     * @param array $newData
+     * @return void
+     */
+    protected function putData($uri,array $newData) {
+
+        $path = $this->getFileNameForUri($uri);
+
+        // opening up the file, and creating a shared lock
+        $handle = fopen($path,'a+');
+        flock($handle,LOCK_EX);
+        ftruncate($handle,0);
+        rewind($handle);
+
+        fwrite($handle,serialize($newData));
+        fclose($handle);
+
+    }
+
+}
+

dav/SabreDAV/lib/Sabre/DAV/Locks/Backend/File.php

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+<?php
+
+/**
+ * The Lock manager allows you to handle all file-locks centrally.
+ *
+ * This Lock Manager stores all its data in a single file.
+ *
+ * Note that this is not nearly as robust as a database, you are encouraged
+ * to use the PDO backend instead.
+ *
+ * @package Sabre
+ * @subpackage DAV
+ * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
+ * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+class Sabre_DAV_Locks_Backend_File extends Sabre_DAV_Locks_Backend_Abstract {
+
+    /**
+     * The storage file
+     *
+     * @var string
+     */
+    private $locksFile;
+
+    /**
+     * Constructor
+     *
+     * @param string $locksFile path to file
+     */
+    public function __construct($locksFile) {
+
+        $this->locksFile = $locksFile;
+
+    }
+
+    /**
+     * Returns a list of Sabre_DAV_Locks_LockInfo objects
+     *
+     * This method should return all the locks for a particular uri, including
+     * locks that might be set on a parent uri.
+     *
+     * If returnChildLocks is set to true, this method should also look for
+     * any locks in the subtree of the uri for locks.
+     *
+     * @param string $uri
+     * @param bool $returnChildLocks
+     * @return array
+     */
+    public function getLocks($uri, $returnChildLocks) {
+
+        $newLocks = array();
+
+        $locks = $this->getData();
+
+        foreach($locks as $lock) {
+
+            if ($lock->uri === $uri ||
+                //deep locks on parents
+                ($lock->depth!=0 && strpos($uri, $lock->uri . '/')===0) ||
+
+                // locks on children
+                ($returnChildLocks && (strpos($lock->uri, $uri . '/')===0)) ) {
+
+                $newLocks[] = $lock;
+
+            }
+
+        }
+
+        // Checking if we can remove any of these locks
+        foreach($newLocks as $k=>$lock) {
+            if (time() > $lock->timeout + $lock->created) unset($newLocks[$k]);
+        }
+        return $newLocks;
+
+    }
+
+    /**
+     * Locks a uri
+     *
+     * @param string $uri
+     * @param Sabre_DAV_Locks_LockInfo $lockInfo
+     * @return bool
+     */
+    public function lock($uri, Sabre_DAV_Locks_LockInfo $lockInfo) {
+
+        // We're making the lock timeout 30 minutes
+        $lockInfo->timeout = 1800;
+        $lockInfo->created = time();
+        $lockInfo->uri = $uri;
+
+        $locks = $this->getData();
+
+        foreach($locks as $k=>$lock) {
+            if (
+                ($lock->token == $lockInfo->token) ||
+                (time() > $lock->timeout + $lock->created)
+            ) {
+                unset($locks[$k]);
+            }
+        }
+        $locks[] = $lockInfo;
+        $this->putData($locks);
+        return true;
+
+    }
+
+    /**
+     * Removes a lock from a uri
+     *
+     * @param string $uri
+     * @param Sabre_DAV_Locks_LockInfo $lockInfo
+     * @return bool
+     */
+    public function unlock($uri, Sabre_DAV_Locks_LockInfo $lockInfo) {
+
+        $locks = $this->getData();
+        foreach($locks as $k=>$lock) {
+
+            if ($lock->token == $lockInfo->token) {
+
+                unset($locks[$k]);
+                $this->putData($locks);
+                return true;
+
+            }
+        }
+        return false;
+
+    }
+
+    /**
+     * Loads the lockdata from the filesystem.
+     *
+     * @return array
+     */
+    protected function getData() {
+
+        if (!file_exists($this->locksFile)) return array();
+
+        // opening up the file, and creating a shared lock
+        $handle = fopen($this->locksFile,'r');
+        flock($handle,LOCK_SH);
+
+        // Reading data until the eof
+        $data = stream_get_contents($handle);
+
+        // We're all good
+        fclose($handle);
+
+        // Unserializing and checking if the resource file contains data for this file
+        $data = unserialize($data);
+        if (!$data) return array();
+        return $data;
+
+    }
+
+    /**
+     * Saves the lockdata
+     *
+     * @param array $newData
+     * @return void
+     */
+    protected function putData(array $newData) {
+
+        // opening up the file, and creating an exclusive lock
+        $handle = fopen($this->locksFile,'a+');
+        flock($handle,LOCK_EX);
+
+        // We can only truncate and rewind once the lock is acquired.
+        ftruncate($handle,0);
+        rewind($handle);
+
+        fwrite($handle,serialize($newData));
+        fclose($handle);
+
+    }
+
+}
+

dav/SabreDAV/lib/Sabre/DAV/Locks/Backend/PDO.php

@@ -0,0 +1,165 @@
+<?php
+
+/**
+ * The Lock manager allows you to handle all file-locks centrally.
+ *
+ * This Lock Manager stores all its data in a database. You must pass a PDO
+ * connection object in the constructor.
+ *
+ * @package Sabre
+ * @subpackage DAV
+ * @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
+ * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+class Sabre_DAV_Locks_Backend_PDO extends Sabre_DAV_Locks_Backend_Abstract {
+
+    /**
+     * The PDO connection object
+     *
+     * @var pdo
+     */
+    private $pdo;
+
+    /**
+     * The PDO tablename this backend uses.
+     *
+     * @var string
+     */
+    protected $tableName;
+
+    /**
+     * Constructor
+     *
+     * @param PDO $pdo
+     * @param string $tableName
+     */
+    public function __construct(PDO $pdo, $tableName = 'locks') {
+
+        $this->pdo = $pdo;
+        $this->tableName = $tableName;
+
+    }
+
+    /**
+     * Returns a list of Sabre_DAV_Locks_LockInfo objects
+     *
+     * This method should return all the locks for a particular uri, including
+     * locks that might be set on a parent uri.
+     *
+     * If returnChildLocks is set to true, this method should also look for
+     * any locks in the subtree of the uri for locks.
+     *
+     * @param string $uri
+     * @param bool $returnChildLocks
+     * @return array
+     */
+    public function getLocks($uri, $returnChildLocks) {
+
+        // NOTE: the following 10 lines or so could be easily replaced by
+        // pure sql. MySQL's non-standard string concatenation prevents us
+        // from doing this though.
+        $query = 'SELECT owner, token, timeout, created, scope, depth, uri FROM '.$this->tableName.' WHERE ((created + timeout) > CAST(? AS UNSIGNED INTEGER)) AND ((uri = ?)';
+        $params = array(time(),$uri);
+
+        // We need to check locks for every part in the uri.
+        $uriParts = explode('/',$uri);
+
+        // We already covered the last part of the uri
+        array_pop($uriParts);
+
+        $currentPath='';
+
+        foreach($uriParts as $part) {
+
+            if ($currentPath) $currentPath.='/';
+            $currentPath.=$part;
+
+            $query.=' OR (depth!=0 AND uri = ?)';
+            $params[] = $currentPath;
+
+        }
+
+        if ($returnChildLocks) {
+
+            $query.=' OR (uri LIKE ?)';
+            $params[] = $uri . '/%';
+
+        }
+        $query.=')';
+
+        $stmt = $this->pdo->prepare($query);
+        $stmt->execute($params);
+        $result = $stmt->fetchAll();
+
+        $lockList = array();
+        foreach($result as $row) {
+
+            $lockInfo = new Sabre_DAV_Locks_LockInfo();
+            $lockInfo->owner = $row['owner'];
+            $lockInfo->token = $row['token'];
+            $lockInfo->timeout = $row['timeout'];
+            $lockInfo->created = $row['created'];
+            $lockInfo->scope = $row['scope'];
+            $lockInfo->depth = $row['depth'];
+            $lockInfo->uri   = $row['uri'];
+            $lockList[] = $lockInfo;
+
+        }
+
+        return $lockList;
+
+    }
+
+    /**
+     * Locks a uri
+     *
+     * @param string $uri
+     * @param Sabre_DAV_Locks_LockInfo $lockInfo
+     * @return bool
+     */
+    public function lock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
+
+        // We're making the lock timeout 30 minutes
+        $lockInfo->timeout = 30*60;
+        $lockInfo->created = time();
+        $lockInfo->uri = $uri;
+
+        $locks = $this->getLocks($uri,false);
+        $exists = false;
+        foreach($locks as $lock) {
+            if ($lock->token == $lockInfo->token) $exists = true;
+        }
+
+        if ($exists) {
+            $stmt = $this->pdo->prepare('UPDATE '.$this->tableName.' SET owner = ?, timeout = ?, scope = ?, depth = ?, uri = ?, created = ? WHERE token = ?');
+            $stmt->execute(array($lockInfo->owner,$lockInfo->timeout,$lockInfo->scope,$lockInfo->depth,$uri,$lockInfo->created,$lockInfo->token));
+        } else {
+            $stmt = $this->pdo->prepare('INSERT INTO '.$this->tableName.' (owner,timeout,scope,depth,uri,created,token) VALUES (?,?,?,?,?,?,?)');
+            $stmt->execute(array($lockInfo->owner,$lockInfo->timeout,$lockInfo->scope,$lockInfo->depth,$uri,$lockInfo->created,$lockInfo->token));
+        }
+
+        return true;
+
+    }
+
+
+
+    /**
+     * Removes a lock from a uri
+     *
+     * @param string $uri
+     * @param Sabre_DAV_Locks_LockInfo $lockInfo
+     * @return bool
+     */
+    public function unlock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
+
+        $stmt = $this->pdo->prepare('DELETE FROM '.$this->tableName.' WHERE uri = ? AND token = ?');
+        $stmt->execute(array($uri,$lockInfo->token));
+
+        return $stmt->rowCount()===1;
+
+    }
+
+}
+