From b987242837d2b8a451862e89c9ca842c07b354b8 Mon Sep 17 00:00:00 2001
From: Niclas Berglind <nb@kjam.se>
Date: Sat, 22 Mar 2014 14:14:30 +0100
Subject: [PATCH] Started work on Snapshot class.

Signed-off-by: Niclas Berglind <nb@kjam.se>
---
 src/Snapshot.php | 157 +++++++++++++++++++++++++++--------------------
 1 file changed, 90 insertions(+), 67 deletions(-)

diff --git a/src/Snapshot.php b/src/Snapshot.php
index c47bf6c..6e32698 100644
--- a/src/Snapshot.php
+++ b/src/Snapshot.php
@@ -1,4 +1,6 @@
 <?php
+require_once("Exception.php");
+require_once("openmediavault/util.inc");
 
 /**
  * XXX detailed description
@@ -10,90 +12,111 @@
 class OMVModuleZFSSnapshot {
     // Attributes
     /**
-     * XXX
+     * Name of the Snapshot
      *
      * @var    string $name
      * @access private
      */
-    private $_name;
+    private $name;
 
     /**
-     * XXX
+     * Properties associated with the Snaphost
      *
-     * @var    int $size
+     * @var    array $properties
      * @access private
      */
-    private $_size;
-
-    /**
-     * XXX
-     *
-     * @var    string $mountPoint
-     * @access private
-     */
-    private $_mountPoint;
-
-    /**
-     * XXX
-     *
-     * @var    list<Feature> $features
-     * @access private
-     */
-    private $_features;
+    private $properties;
 
     // Associations
     // Operations
-    /**
-     * XXX
-     *
-     * @return string XXX
-     * @access public
-     */
-    public function getName() {
-        trigger_error('Not Implemented!', E_USER_WARNING);
-    }
 
-    /**
-     * XXX
-     *
-     * @return int XXX
-     * @access public
-     */
-    public function getSize() {
-        trigger_error('Not Implemented!', E_USER_WARNING);
-    }
+	/**
+	 * Constructor. If the Snapshot already exists in the system the object will be updated with all
+	 * associated properties from commandline.
+	 * 
+	 * @param string $name Name of the new Snapshot
+	 * @return void
+	 * @access public
+	 */
+	public function __construct($name) {
+		$this->name = $name;
+		$qname = preg_quote($name, '/');
+		$cmd = "zfs list -H -t snapshot";
+		$this->exec($cmd, $out, $res);
+		foreach ($out as $line) {
+			if (preg_match('/^' . $qname . '\t.*$/', $line)) {
+				print("Name found!!!\n");
+				$this->updateAllProperties();
+				continue;
+			}
+		}
+	}
 
-    /**
-     * XXX
-     *
-     * @return string XXX
-     * @access public
-     */
-    public function getMountPoint() {
-        trigger_error('Not Implemented!', E_USER_WARNING);
-    }
+	/**
+	 * Return name of the Snapshot
+	 *
+	 * @return string Nameof the Snapshot
+	 * @access public
+	 */
+	public function getName() {
+		return $this->name;
+	}
 
-    /**
-     * XXX
-     *
-     * @return list<Feature> XXX
-     * @access public
-     */
-    public function getFeatures() {
-        trigger_error('Not Implemented!', E_USER_WARNING);
-    }
+	/**
+	 * XXX
+	 *
+	 * @return list<Feature> XXX
+	 * @access public
+	 */
+	public function getFeatures() {
+		trigger_error('Not Implemented!', E_USER_WARNING);
+	}
 
-    /**
-     * XXX
-     *
-     * @param   $list<Feature> XXX
-     * @return void XXX
-     * @access public
-     */
-    public function setFeatures($list<Feature>) {
-        trigger_error('Not Implemented!', E_USER_WARNING);
-    }
+	/**
+	 * XXX
+	 *
+	 * @param   $list<Feature> XXX
+	 * @return void XXX
+	 * @access public
+	 */
+	public function setFeatures($list) {
+		trigger_error('Not Implemented!', E_USER_WARNING);
+	}
+
+	/**
+	 * Get all Snapshot properties from commandline and update object properties attribute
+	 * 
+	 * @return void
+	 * @access private
+	 */
+	private function updateAllProperties() {
+		$cmd = "zfs get -H all " . $this->name;
+		$this->exec($cmd,$out,$res);
+		unset($this->properties);
+		foreach ($out as $line) {
+			$tmpary = preg_split('/\t+/', $line);
+			$this->properties["$tmpary[1]"] = array("value" => $tmpary[2], "source" => $tmpary[3]);
+		}
+	}
 
+	/**
+	 * Helper function to execute a command and throw an exception on error
+	 * (requires stderr redirected to stdout for proper exception message).
+	 * 
+	 * @param string $cmd Command to execute
+	 * @param array &$out If provided will contain output in an array
+	 * @param int &$res If provided will contain Exit status of the command
+	 * @return string Last line of output when executing the command
+	 * @throws OMVModuleZFSException
+	 * @access private
+	 */
+	private function exec($cmd, &$out = null, &$res = null) {
+		$tmp = OMVUtil::exec($cmd, $out, $res);
+		if ($res) {
+			throw new OMVModuleZFSException(implode("\n", $out));
+		}
+		return $tmp;
+	}
 }
 
 ?>
-- 
2.39.2