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diff --git a/source/objects/CalDAV/CalDAV.h b/source/objects/CalDAV/CalDAV.h
index 0413429..5629b87 100644
--- a/source/objects/CalDAV/CalDAV.h
+++ b/source/objects/CalDAV/CalDAV.h
@@ -1,15 +1,201 @@
+// CalDAV.h - CalDAV Connection Object header.
+//
+// (c) 2016-2017 Xestia Software Development.
+//
+// This file is part of Xestia Calendar.
+//
+// Xestia Calendar is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by the
+// Free Software Foundation, version 3 of the license.
+//
+// Xestia Calendar is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with Xestia Calendar. If not, see <http://www.gnu.org/licenses/>
+
 #ifndef __OBJECTS_CALDAV_CALDAV_H__
 #define __OBJECTS_CALDAV_CALDAV_H__
 
 #include <curl/curl.h>
+#include <libxml/parser.h>
+#include <libxml/tree.h>
 #include <string>
+#include <iostream>
+#include <vector>
+#include <stdexcept>
+#include <map>
+#include "../../common/colour.h"
+#include "../../common/text.h"
+#include "../../common/uuid.h"
 
 using namespace std;
 
+// CalDAVConnectionData: used for
+// connecting to the server.
+
+enum CalDAVQueryResult {
+	CALDAVQUERYRESULT_UNITTESTFAIL = -1,
+	CALDAVQUERYRESULT_OK,
+	CALDAVQUERYRESULT_NOTRUN,
+	CALDAVQUERYRESULT_SERVERERROR
+};
+
+struct CalDAVCalendarList {
+
+	map<int,string> Name;
+	map<int,string> HREF;
+	map<int,int> Order;
+	map<int,string> Description;
+	map<int,Colour> CalColour;
+	map<int,string> Tag;
+	map<int,string> TagURL;
+	
+};
+
+struct CalDAVEntryList {
+	
+	map<int,string> HREF;
+	map<int,string> Data;
+	map<int,string> Tag;
+	
+};
+
+struct CalDAVConnectionData{
+	
+	string Hostname = "";
+	int Port = 8008;
+	string Username = "";
+	string Password = "";
+	string Prefix = "";
+	bool UseSSL = true;
+	int Timeout = 60;
+	
+};
+
+// CalDAVStatusData: used for
+// getting the current server
+// settings for the CalDAV
+// object.
+
+struct CalDAVStatus{
+
+	string Hostname;
+	int Port;
+	string Username;
+	string Prefix;
+	bool UseSSL;	
+	int Timeout;
+
+};
+
+// CalDAVServerSupport: used for
+// getting what the server supports
+// from the CalDAV specification.
+
+struct CalDAVServerSupport{
+	
+	// Variable name.			   Name in CalDAV header.
+	
+	bool BasicSupport = false;		// calendar-access
+	
+};
+
+// CalDAVServerResult: used for
+// getting the result of the
+// request made via the CalDAV
+// object.
+
+struct CalDAVServerResult{
+
+	CalDAVQueryResult Result = CALDAVQUERYRESULT_NOTRUN;
+	CURLcode Code = CURLE_OK;
+	long HTTPCode = 0;
+	
+};
+
+// CalDAVSendData: used for
+// sending data to the CaLDAV
+// server.
+
+struct CalDAVSendData{
+	string *readptr;
+	long sizeleft;
+	int seek = 0;
+};
+
 class CalDAV{
 
+	private:
+		string ProcessXMLUserPrincipal();
+		string ProcessXMLCalendarHome();
+		CalDAVCalendarList ProcessXMLCalendarList();
+		CalDAVEntryList ProcessXMLEntryList();
+		CalDAVEntryList ProcessXMLSyncTokenList();
+		string ProcessXMLEntryETag();
+		bool MatchXMLNameTransverse(xmlNodePtr *NodePtr, string NodeName);
+		bool MatchXMLName(xmlNodePtr *NodePtrOriginal, string NodeName);
+		string FetchXMLData(xmlNodePtr *NodePtr);
+		CalDAVServerResult EditCalendarProcess(string *CalendarHREF,
+			string *CalendarName,
+			Colour *CalendarColour,
+			string *CalendarDescription,
+			int *CalendarOrder);
+	
+		CalDAVConnectionData ConnectionData;
+		CalDAVServerResult ConnectionServerResult;
+		CURL *ConnectionHandle = nullptr;
+		string ServerData = "";
+		string ServerHeader = "";
 	
+	public:
+		CalDAV();
+		~CalDAV();
+		void SetupConnectionData(CalDAVConnectionData *ConnData);
+		CalDAVStatus GetConnectionData();
+		CalDAVServerResult Connect();
+		CalDAVServerResult GetServerResult();
+		CalDAVServerSupport GetServerSupport();
+		CalDAVCalendarList GetCalendars();
+		CalDAVEntryList GetEntryList(string *CalendarHREF);
+		CalDAVEntryList GetEntryList(string *CalendarHREF, string *CalendarTag);
+	
+		CalDAVServerResult AddCalendar(string CalendarName);
+		CalDAVServerResult AddCalendar(string *CalendarName, string *CalendarShortName);
+	
+		CalDAVServerResult EditCalendar(string *CalendarHREF,
+			string *CalendarName,
+			Colour *CalendarColour,
+			string *CalendarDescription,
+			int *CalendarOrder);
+		CalDAVServerResult EditCalendar(string *CalendarHREF,
+			Colour *CalendarColour);
+		CalDAVServerResult EditCalendar(string *CalendarHREF,
+			string *CalendarName);
+		CalDAVServerResult EditCalendar(string *CalendarHREF,
+			int *CalendarOrder);
+		CalDAVServerResult EditCalendarDescription(string *CalendarHREF,
+			string *CalendarDescription);
+		
+		CalDAVServerResult DeleteCalendar(string *CalendarHREF);
+		
+		CalDAVServerResult AddEntry(string *CalendarEntryHREF, string *EntryData);
+		CalDAVServerResult EditEntry(string *CalendarEntryHREF, string *EntryData, string *EntryETag);
+		CalDAVServerResult DeleteEntry(string *CalendarEntryHREF);
+	
+		string GetUserPrincipal();
+		string GetCalendarHome(string UserPrincipalURI);
+		
+		CalDAVServerResult GetEntryETag(string *CalendarEntryHREF, string *ETagValue);
 	
 };
 
+// Subroutines that are used with the 
+// CalDAVConnectionData struct.
+
+bool CalDAVObjectValidSettings(CalDAVConnectionData *ConnData);
+string BuildServerAddress(CalDAVConnectionData *ConnData, string URIAddress);
+
 #endif