Add new API call to schedule a cron scrub

Frequency Options: none, daily@XX, weekly@YY@XX, monthly@ZZ@XX
XX = Hour to execute, YY = Day of week to execute, ZZ = Day of month

REST Request:
-------------------------------
PUT /sysadm/lifepreserver
{
   "action" : "cronscrub",
   "pool" : "tank",
   "frequency" : "daily@22"
}

REST Response:
-------------------------------
{
    "args": {
        "cronscrub": {
            "frequency": "daily@22",
            "pool": "tank"
        }
    }
}

WebSocket Request:
-------------------------------
{
   "args" : {
      "action" : "cronscrub",
      "pool" : "tank",
      "frequency" : "daily@22"
   },
   "namespace" : "sysadm",
   "name" : "lifepreserver",
   "id" : "fooid"
}

WebSocket Response:
-------------------------------
{
  "args": {
    "cronscrub": {
      "frequency": "daily@22",
      "pool": "tank"
    }
  },
  "id": "fooid",
  "name": "response",
  "namespace": "sysadm"
}

api/classes/lifepreserver.rst

@@ -178,6 +178,10 @@ Create a Schedule
 The "cronsnap" action is used to create snapshot schedules for Life Preserver. When creating a schedule, specify the ZFS pool to snapshot, how many snapshots to keep, and at what time the
 snapshots should occur.
 
+Frequency: none, daily@XX, hourly, 30min, 10min, 5min (Specifying 'none' disables)
+Keep: <number>
+
+
 **REST Request**
 
 .. code-block:: json
@@ -300,4 +304,4 @@ Run :command:`lpreserver help set` for more information about each available set
   "id": "fooid",
   "name": "response",
   "namespace": "sysadm"
- }
+ }

src/library/sysadm-lifepreserver.cpp

@@ -106,6 +106,52 @@ QJsonObject LifePreserver::listSnap(QJsonObject jsin) {
   return retObject;
 }
 
+// Schedule a new scrub routine
+QJsonObject LifePreserver::scheduleScrub(QJsonObject jsin) {
+   QJsonObject retObject;
+   QString pool, frequency;
+
+   QStringList keys = jsin.keys();
+   bool ok = false;
+   if(! keys.contains("pool") || ! keys.contains("frequency")){
+     retObject.insert("error", "Requires pool and frequency keys");
+     return retObject;
+   }
+
+   // Check which pool we are looking at
+   pool = jsin.value("pool").toString();
+   frequency = jsin.value("frequency").toString();
+
+   // Make sure we have the pool / frequency / keep key(s)
+   if ( pool.isEmpty() || frequency.isEmpty() ) {
+     retObject.insert("error", "Empty pool or frequency keys ");
+     return retObject;
+   }
+
+   QStringList output;
+   if ( frequency == "none" )
+     output = General::RunCommand("lpreserver cronscrub " + pool + " stop " + frequency).split("\n");
+   else
+     output = General::RunCommand("lpreserver cronscrub " + pool + " start " + frequency).split("\n");
+
+   // Check for any errors
+   for ( int i = 0; i < output.size(); i++)
+   {
+      if ( output.at(i).indexOf("ERROR:") != -1 ) {
+       retObject.insert("error", output.at(i));
+       return retObject;
+      } 
+   }
+
+   // Got to the end, return the good json
+   QJsonObject values;
+   values.insert("pool", pool);
+   values.insert("frequency", frequency);
+
+   return values;
+}
+
+
 // Schedule a new snapshot routine
 QJsonObject LifePreserver::scheduleSnapshot(QJsonObject jsin) {
    QJsonObject retObject;
@@ -129,7 +175,11 @@ QJsonObject LifePreserver::scheduleSnapshot(QJsonObject jsin) {
      return retObject;
    }
 
-   QStringList output = General::RunCommand("lpreserver cronsnap " + pool + " start " + frequency + " " + keep ).split("\n");
+   QStringList output;
+   if ( frequency == "none" )
+     output = General::RunCommand("lpreserver cronsnap " + pool + " stop " ).split("\n");
+   else
+     output = General::RunCommand("lpreserver cronsnap " + pool + " start " + frequency + " " + keep ).split("\n");
 
    // Check for any errors
    for ( int i = 0; i < output.size(); i++)

src/library/sysadm-lifepreserver.h

@@ -18,6 +18,7 @@ public:
 	static QJsonObject listCron(); 
 	static QJsonObject listSnap(QJsonObject jsin);
 	static QJsonObject scheduleSnapshot(QJsonObject jsin);
+	static QJsonObject scheduleScrub(QJsonObject jsin);
 	static QJsonObject settings();
 };
 	

src/server/WebBackend.cpp

@@ -149,6 +149,10 @@ RestOutputStruct::ExitCode WebSocket::EvaluateSysadmLifePreserverRequest(const Q
 	ok = true;
         out->insert("listsnap", sysadm::LifePreserver::listSnap(in_args.toObject()));
       }
+      if(act=="cronscrub"){
+	ok = true;
+        out->insert("cronscrub", sysadm::LifePreserver::scheduleScrub(in_args.toObject()));
+      }
       if(act=="cronsnap"){
 	ok = true;
         out->insert("cronsnap", sysadm::LifePreserver::scheduleSnapshot(in_args.toObject()));