source/objects/CalDAV/CalDAV.cpp

   1 // CalDAV.cpp - CalDAV Connection Object.
   2 //
   3 // (c) 2016 Xestia Software Development.
   4 //
   5 // This file is part of Xestia Calendar.
   6 //
   7 // Xestia Address Book is free software: you can redistribute it and/or modify
   8 // it under the terms of the GNU General Public License as published by the
   9 // Free Software Foundation, version 3 of the license.
  10 //
  11 // Xestia Address Book is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with Xestia Calendar. If not, see <http://www.gnu.org/licenses/>
  18
  19 #include "CalDAV.h"
  20
  21 using namespace std;
  22
  23 size_t CalDAVReceive(char *ReceivedBuffer, size_t Size, size_t NewMemoryBytes, string *StringPointer)
  24 {
  25
  26         string ReceivedBufferString = "";
  27         ReceivedBufferString.append(ReceivedBuffer, NewMemoryBytes);
  28
  29         StringPointer->append(ReceivedBufferString);
  30
  31         return Size * NewMemoryBytes;
  32
  33 }
  34
  35 size_t CalDAVSend(char *SendBuffer, size_t Size, size_t NewMemoryBytes, void *DataStruct){
  36
  37         struct CalDAVSendData *UploadPtr = (struct CalDAVSendData *)DataStruct;
  38
  39         if (UploadPtr->sizeleft){
  40
  41                 UploadPtr->sizeleft--;
  42                 char CharSend;
  43
  44                 CharSend = (*UploadPtr->readptr)[UploadPtr->seek];
  45
  46                 *SendBuffer = CharSend;
  47
  48                 UploadPtr->seek++;
  49
  50                 return 1;
  51
  52         }
  53
  54         return 0;
  55
  56 }
  57
  58 CalDAV::CalDAV(){
  59
  60         // Setup the objects within the CalDAV connection
  61         // object.
  62
  63         ConnectionHandle = curl_easy_init();
  64
  65 }
  66
  67 CalDAV::~CalDAV(){
  68
  69         // Destory the objects within the CalDAV connection
  70         // object.
  71
  72         curl_easy_cleanup(ConnectionHandle);
  73         ConnectionHandle = nullptr;
  74
  75 }
  76
  77 void CalDAV::SetupConnectionData(CalDAVConnectionData *ConnData){
  78
  79         // Check if ConnData is a nullptr, return if it is.
  80
  81         if (ConnData == nullptr){
  82                 return;
  83         }
  84
  85         // Set the connection settings to the values from ConnData.
  86
  87         ConnectionData = (*ConnData);
  88
  89 }
  90
  91 CalDAVStatus CalDAV::GetConnectionData(){
  92
  93         // Get the current connection settings for the CalDAV
  94         // connection object and return a CalDAVStatus object.
  95
  96         CalDAVStatus ConnectionStatus;
  97
  98         ConnectionStatus.Hostname = ConnectionData.Hostname;
  99         ConnectionStatus.Port = ConnectionData.Port;
 100         ConnectionStatus.Username = ConnectionData.Username;
 101         ConnectionStatus.Prefix = ConnectionData.Prefix;
 102         ConnectionStatus.UseSSL = ConnectionData.UseSSL;
 103         ConnectionStatus.Timeout = ConnectionData.Timeout;
 104
 105         return ConnectionStatus;
 106
 107 }
 108
 109 CalDAVServerResult CalDAV::Connect(){
 110
 111         CalDAVServerResult ServerResult;
 112
 113         string ServerAddress = "";
 114         string ServerUserPass = "";
 115
 116         // Setup the server address.
 117
 118         ServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 119
 120         // Setup the server password.
 121
 122         ServerUserPass += ConnectionData.Username;
 123         ServerUserPass += ":";
 124         ServerUserPass += ConnectionData.Password;
 125
 126         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, ServerAddress.c_str());
 127         curl_easy_setopt(ConnectionHandle, CURLOPT_USERPWD, ServerUserPass.c_str());
 128         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
 129         curl_easy_setopt(ConnectionHandle, CURLOPT_FAILONERROR, 1L);
 130         curl_easy_setopt(ConnectionHandle, CURLOPT_TIMEOUT, ConnectionData.Timeout);
 131         curl_easy_setopt(ConnectionHandle, CURLOPT_WRITEFUNCTION, CalDAVReceive);
 132         curl_easy_setopt(ConnectionHandle, CURLOPT_WRITEDATA, &ServerData);
 133         curl_easy_setopt(ConnectionHandle, CURLOPT_WRITEHEADER, &ServerHeader);
 134
 135         // Connect to the CalDAV server.
 136
 137         ServerResult.Code = curl_easy_perform(ConnectionHandle);
 138
 139         // Process the result received from the server.
 140
 141         if (ServerResult.Code != CURLE_OK){
 142
 143                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 144
 145         } else {
 146
 147                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 148
 149         }
 150
 151         // Get the HTTP code.
 152
 153         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
 154
 155         return ServerResult;
 156
 157 }
 158
 159 CalDAVServerResult CalDAV::GetServerResult(){
 160
 161         return ConnectionServerResult;
 162
 163 }
 164
 165 CalDAVServerSupport CalDAV::GetServerSupport(){
 166
 167         CalDAVServerSupport ServerStatus;
 168
 169         // Setup the server connection.
 170
 171         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "OPTIONS");
 172
 173         CURLcode ServerResult = curl_easy_perform(ConnectionHandle);
 174
 175         // Set the results.
 176
 177         if (ServerResult == CURLE_OK){
 178                 ConnectionServerResult.Result = CALDAVQUERYRESULT_OK;
 179         } else {
 180                 ConnectionServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 181         }
 182         ConnectionServerResult.Code = ServerResult;
 183         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ConnectionServerResult.HTTPCode);
 184
 185         if (ServerResult != CURLE_OK){
 186                 return ServerStatus;
 187         }
 188
 189         // Check that the server header has data in,
 190         // otherwise return an "empty" CalDAVServerSupport.
 191
 192         if (ServerHeader.size() == 0){
 193                 return ServerStatus;
 194         }
 195
 196         // Process each line looking for the first DAV header
 197         // line.
 198
 199         bool NewlineMode = true;
 200
 201         string DAVLine;
 202
 203         for (int CharSeek = 0; CharSeek < ServerHeader.size(); CharSeek++){
 204
 205                 if (NewlineMode == true){
 206
 207                         // Check if we have reached the end of the string.
 208
 209                         if (CharSeek >= ServerHeader.size()){
 210
 211                                 break;
 212
 213                         }
 214
 215                         // Check the first four letters to make sure
 216                         // they are 'DAV:'.
 217
 218                         string DAVHeaderCheck = "";
 219
 220                         try {
 221                                 DAVHeaderCheck = ServerHeader.substr(CharSeek, 4);
 222                         }
 223
 224                         catch (out_of_range &oor){
 225                                 break;
 226                         }
 227
 228                         if (DAVHeaderCheck == "DAV:"){
 229
 230                                 CharSeek += 5;
 231
 232                                 for (; CharSeek < ServerHeader.size(); CharSeek++){
 233
 234                                         if (ServerHeader[CharSeek] == '\n'){
 235
 236                                                 break;
 237
 238                                         }
 239
 240                                         DAVLine.push_back(ServerHeader[CharSeek]);
 241
 242                                 }
 243
 244                                 break;
 245
 246                         }
 247
 248                         NewlineMode = false;
 249
 250                 }
 251
 252                 if (ServerHeader[CharSeek] == '\n'){
 253
 254                         NewlineMode = true;
 255
 256                 }
 257
 258         }
 259
 260         // Process the DAV line.
 261
 262         vector<string> DAVLineData;
 263         string DAVSegmentString;
 264
 265         for (int CharSeek = 0; CharSeek < DAVLine.size(); CharSeek++){
 266
 267                 if (DAVLine[CharSeek] == ' '){
 268                         continue;
 269                 }
 270
 271                 if (DAVLine[CharSeek] == ','){
 272
 273                         DAVLineData.push_back(DAVSegmentString);
 274                         DAVSegmentString.clear();
 275                         continue;
 276
 277                 }
 278
 279                 DAVSegmentString += DAVLine[CharSeek];
 280
 281         }
 282
 283         // Process the DAV values and set each value
 284         // to true as required.
 285
 286         for (int DAVItemSeek = 0;
 287                 DAVItemSeek < DAVLineData.size();
 288                 DAVItemSeek++){
 289
 290                 if (DAVLineData.at(DAVItemSeek) == "calendar-access"){
 291
 292                         ServerStatus.BasicSupport = true;
 293
 294                 }
 295
 296         }
 297
 298         // Reset the connection status.
 299
 300         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 301
 302         return ServerStatus;
 303
 304 }
 305
 306 string CalDAV::GetUserPrincipal(){
 307
 308         string CurrentUserPrincipal = "";
 309         string UserPrincipalRequest = "";
 310         CalDAVSendData UserPrincipalSendData;
 311
 312         UserPrincipalRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 313         "<d:propfind xmlns:d=\"DAV:\">\n"
 314         " <d:prop>\n"
 315         "  <d:current-user-principal />\n"
 316         " </d:prop>\n"
 317         "</d:propfind>";
 318
 319         UserPrincipalSendData.readptr = &UserPrincipalRequest;
 320         UserPrincipalSendData.sizeleft = UserPrincipalRequest.size();
 321
 322         // Setup the header.
 323
 324         struct curl_slist *UserPrincipalRequestHeader = NULL;
 325
 326         UserPrincipalRequestHeader = curl_slist_append(UserPrincipalRequestHeader, "Depth: 0");
 327         UserPrincipalRequestHeader = curl_slist_append(UserPrincipalRequestHeader, "Prefer: return-minimal");
 328         UserPrincipalRequestHeader = curl_slist_append(UserPrincipalRequestHeader, "Content-Type: application/xml; charset=utf-8");
 329
 330         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, UserPrincipalRequestHeader);
 331
 332         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PROPFIND");
 333         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 334         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &UserPrincipalSendData);
 335         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 336
 337         // Process the data.
 338
 339         ServerData.clear();
 340         ServerHeader.clear();
 341
 342         CURLcode ServerResult = curl_easy_perform(ConnectionHandle);
 343
 344         // Set the results.
 345
 346         if (ServerResult == CURLE_OK){
 347                 ConnectionServerResult.Result = CALDAVQUERYRESULT_OK;
 348         } else {
 349                 ConnectionServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 350         }
 351         ConnectionServerResult.Code = ServerResult;
 352         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ConnectionServerResult.HTTPCode);
 353
 354         if (ServerResult != CURLE_OK){
 355
 356                 return CurrentUserPrincipal;
 357
 358         }
 359
 360         // Process the User Principal from the ServerData.
 361
 362         CurrentUserPrincipal = ProcessXMLUserPrincipal();
 363
 364         // Reset the changed settings.
 365
 366         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 367         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 368         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 369
 370         return CurrentUserPrincipal;
 371
 372 }
 373
 374 string CalDAV::GetCalendarHome(string UserPrincipalURI){
 375
 376         string CalendarHomeURI = "";
 377
 378         // Build the Calendar Home URL address.
 379
 380         string CalendarHomeURL = BuildServerAddress(&ConnectionData, UserPrincipalURI);
 381
 382         // Setup the header request.
 383
 384         CalDAVSendData CalendarHomeSendData;
 385
 386         string CalendarHomeRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 387         "<d:propfind xmlns:d=\"DAV:\" xmlns:c=\"urn:ietf:params:xml:ns:caldav\">\n"
 388         " <d:prop>\n"
 389         "  <c:calendar-home-set />\n"
 390         " </d:prop>\n"
 391         "</d:propfind>";
 392
 393         CalendarHomeSendData.readptr = &CalendarHomeRequest;
 394         CalendarHomeSendData.sizeleft = CalendarHomeRequest.size();
 395
 396         // Setup the header.
 397
 398         struct curl_slist *CalendarRequestHeader = NULL;
 399
 400         CalendarRequestHeader = curl_slist_append(CalendarRequestHeader, "Depth: 0");
 401         CalendarRequestHeader = curl_slist_append(CalendarRequestHeader, "Prefer: return-minimal");
 402         CalendarRequestHeader = curl_slist_append(CalendarRequestHeader, "Content-Type: application/xml; charset=utf-8");
 403
 404         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarRequestHeader);
 405         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarHomeURL.c_str());
 406         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PROPFIND");
 407         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 408         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &CalendarHomeSendData);
 409         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 410
 411         // Process the data.
 412
 413         ServerData.clear();
 414         ServerHeader.clear();
 415
 416         CURLcode ServerResult = curl_easy_perform(ConnectionHandle);
 417
 418         // Set the results.
 419
 420         if (ServerResult == CURLE_OK){
 421                 ConnectionServerResult.Result = CALDAVQUERYRESULT_OK;
 422         } else {
 423                 ConnectionServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 424         }
 425         ConnectionServerResult.Code = ServerResult;
 426         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ConnectionServerResult.HTTPCode);
 427
 428         if (ServerResult != CURLE_OK){
 429
 430                 return CalendarHomeURI;
 431
 432         }
 433
 434         // Process the User Principal from the ServerData.
 435
 436         CalendarHomeURI = ProcessXMLCalendarHome();
 437
 438         // Reset the changed settings.
 439
 440         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 441         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 442
 443         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 444         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 445         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 446         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
 447
 448         return CalendarHomeURI;
 449
 450 }
 451
 452 CalDAVCalendarList CalDAV::GetCalendars(){
 453
 454         CalDAVCalendarList ServerList;
 455         CalDAVSendData CalendarListSendData;
 456
 457         // Build the server address.
 458
 459         string UserPrincipalURI = "";
 460         UserPrincipalURI = GetUserPrincipal();
 461
 462         if (UserPrincipalURI.size() == 0){
 463
 464                 return ServerList;
 465
 466         }
 467
 468         string CalendarHomeURI = "";
 469         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 470
 471         string CalendarListURLAddress = BuildServerAddress(&ConnectionData, CalendarHomeURI);
 472
 473         string CalendarListRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 474         "<d:propfind xmlns:d=\"DAV:\" xmlns:cs=\"http://calendarserver.org/ns/\""
 475         " xmlns:c=\"urn:ietf:params:xml:ns:caldav\" xmlns:x0=\"http://apple.com/ns/ical/\">\n"
 476         " <d:prop>\n"
 477         "  <d:resourcetype />\n"
 478         "  <d:displayname />\n"
 479         "  <d:sync-token />\n"
 480         "  <x0:calendar-color />\n"
 481         "  <x0:calendar-order />\n"
 482         "  <cs:getctag />\n"
 483         "  <c:supported-calendar-component-set />\n"
 484         "  <c:calendar-description />\n"
 485         " </d:prop>\n"
 486         "</d:propfind>";
 487
 488         CalendarListSendData.readptr = &CalendarListRequest;
 489         CalendarListSendData.sizeleft = CalendarListRequest.size();
 490
 491         // Setup the header.
 492
 493         struct curl_slist *CalendarListRequestHeader = NULL;
 494
 495         CalendarListRequestHeader = curl_slist_append(CalendarListRequestHeader, "Depth: 1");
 496         CalendarListRequestHeader = curl_slist_append(CalendarListRequestHeader, "Prefer: return-minimal");
 497         CalendarListRequestHeader = curl_slist_append(CalendarListRequestHeader, "Content-Type: application/xml; charset=utf-8");
 498
 499         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarListRequestHeader);
 500         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarListURLAddress.c_str());
 501         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PROPFIND");
 502         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 503         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &CalendarListSendData);
 504         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 505
 506         // Process the data.
 507
 508         ServerData.clear();
 509         ServerHeader.clear();
 510
 511         CURLcode ServerResult = curl_easy_perform(ConnectionHandle);
 512
 513         //ServerList = ProcessXMLCalendarList();
 514
 515         if (ServerResult == CURLE_OK){
 516                 ConnectionServerResult.Result = CALDAVQUERYRESULT_OK;
 517         } else {
 518                 ConnectionServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 519         }
 520         ConnectionServerResult.Code = ServerResult;
 521         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ConnectionServerResult.HTTPCode);
 522
 523         if (ServerResult != CURLE_OK){
 524
 525                 return ServerList;
 526
 527         }
 528
 529         // Process the received XML data into a list of calendars
 530         // and locations.
 531
 532         ServerList = ProcessXMLCalendarList();
 533
 534         // Restore the original settings.
 535
 536         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 537
 538         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 539         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 540         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 541         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 542         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 543
 544         return ServerList;
 545
 546 }
 547
 548 CalDAVServerResult CalDAV::AddCalendar(string CalendarName){
 549
 550         CalDAVServerResult ServerResult;
 551
 552         AddCalendar(&CalendarName, nullptr);
 553
 554         return ServerResult;
 555
 556 }
 557
 558 CalDAVServerResult CalDAV::AddCalendar(string *CalendarName, string *CalendarShortName){
 559
 560         CalDAVServerResult ServerResult;
 561         CalDAVSendData CalendarAddSendData;
 562
 563         // Build the server address.
 564
 565         string UserPrincipalURI = "";
 566         UserPrincipalURI = GetUserPrincipal();
 567
 568         if (UserPrincipalURI.size() == 0){
 569
 570                 return ServerResult;
 571
 572         }
 573
 574         string CalendarHomeURI = "";
 575         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 576
 577         // Generate the UUID.
 578
 579         string UUIDValue = "";
 580
 581         if (CalendarShortName == nullptr){
 582
 583                 UUIDValue = GenerateUUID();
 584                 UUIDValue.erase(UUIDValue.end()-1);
 585
 586         } else {
 587
 588                 UUIDValue = *CalendarShortName;
 589
 590         }
 591
 592         string CalendarHomeURL = CalendarHomeURI;
 593         CalendarHomeURL.append(UUIDValue);
 594         CalendarHomeURL.append("/");
 595
 596         // Build the calendar list address.
 597
 598         string CalendarListURLAddress = BuildServerAddress(&ConnectionData, CalendarHomeURL);
 599
 600         string CalendarAddRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 601         "<c:mkcalendar xmlns:d=\"DAV:\" xmlns:c=\"urn:ietf:params:xml:ns:caldav\">\n"
 602         " <d:set>\n"
 603         "  <d:prop>\n"
 604         "   <d:displayname>";
 605         CalendarAddRequest += *CalendarName;
 606         CalendarAddRequest += "</d:displayname>\n"
 607         "   <c:supported-calendar-component-set>\n"
 608         "    <c:comp name=\"VTODO\"/>\n"
 609         "    <c:comp name=\"VEVENT\"/>\n"
 610         "   </c:supported-calendar-component-set>\n"
 611         "  </d:prop>\n"
 612         " </d:set>\n"
 613         "</c:mkcalendar>";
 614
 615         CalendarAddSendData.readptr = &CalendarAddRequest;
 616         CalendarAddSendData.sizeleft = CalendarAddRequest.size();
 617
 618         // Setup the header.
 619
 620         struct curl_slist *CalendarRequestHeader = NULL;
 621
 622         //curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarRequestHeader);
 623         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarListURLAddress.c_str());
 624         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "MKCALENDAR");
 625         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 626         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &CalendarAddSendData);
 627         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 628
 629         // Process the data.
 630
 631         ServerData.clear();
 632         ServerHeader.clear();
 633
 634         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
 635
 636         if (ServerConnectionResult == CURLE_OK){
 637                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 638         } else {
 639                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 640         }
 641         ServerResult.Code = ServerConnectionResult;
 642         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
 643
 644         // Restore the original settings.
 645
 646         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 647         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 648         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 649         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 650         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 651         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 652
 653         return ServerResult;
 654
 655 }
 656
 657 CalDAVServerResult CalDAV::EditCalendarProcess(string *CalendarHREF,
 658                         string *CalendarName,
 659                         Colour *CalendarColour,
 660                         string *CalendarDescription,
 661                         int *CalendarOrder){
 662
 663         CalDAVServerResult ServerResult;
 664         CalDAVSendData CalendarEditSendData;
 665
 666         // Build the server address.
 667
 668         string UserPrincipalURI = "";
 669         UserPrincipalURI = GetUserPrincipal();
 670
 671         if (UserPrincipalURI.size() == 0){
 672
 673                 return ServerResult;
 674
 675         }
 676
 677         string CalendarHomeURI = "";
 678         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 679
 680         // Generate the UUID.
 681
 682         string UUIDValue = GenerateUUID();
 683         UUIDValue.erase(UUIDValue.end()-1);
 684
 685         string CalendarHomeURL = CalendarHomeURI;
 686         CalendarHomeURL.append(UUIDValue);
 687         CalendarHomeURL.append("/");
 688
 689         // Build the calendar list address.
 690
 691         string CalendarEditURLAddress = BuildServerAddress(&ConnectionData, (*CalendarHREF));
 692
 693         string CalendarEditRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 694         "<d:propertyupdate xmlns:d=\"DAV:\" xmlns:c=\"urn:ietf:params:xml:ns:caldav\"\n"
 695         "       xmlns:x0=\"http://apple.com/ns/ical/\">\n"
 696         " <d:set>\n"
 697         "  <d:prop>\n";
 698
 699         // Update the calendar name.
 700
 701         if (CalendarName != nullptr){
 702
 703                 CalendarEditRequest += "<d:displayname>";
 704                 CalendarEditRequest += (*CalendarName);
 705                 CalendarEditRequest += "</d:displayname>\n";
 706
 707         }
 708
 709         // Update the calendar colour.
 710
 711         if (CalendarColour != nullptr){
 712
 713                 CalendarEditRequest += "<x0:calendar-color>";
 714                 CalendarEditRequest += (*CalendarColour);
 715                 CalendarEditRequest += "</x0:calendar-color>\n";
 716
 717         }
 718
 719         // Update the calendar description.
 720
 721         if (CalendarDescription != nullptr){
 722
 723                 CalendarEditRequest += "<c:calendar-description>";
 724                 CalendarEditRequest += (*CalendarDescription);
 725                 CalendarEditRequest += "</c:calendar-description>\n";
 726
 727         }
 728
 729         // Update the calendar order.
 730
 731         if (CalendarOrder != nullptr){
 732
 733                 CalendarEditRequest += "<x0:calendar-order>";
 734                 CalendarEditRequest += to_string((*CalendarOrder));
 735                 CalendarEditRequest += "</x0:calendar-order>\n";
 736
 737         }
 738
 739         CalendarEditRequest += "  </d:prop>\n"
 740         " </d:set>\n"
 741         "</d:propertyupdate>";
 742
 743         CalendarEditSendData.readptr = &CalendarEditRequest;
 744         CalendarEditSendData.sizeleft = CalendarEditRequest.size();
 745
 746         // Setup the header.
 747
 748         struct curl_slist *CalendarRequestHeader = NULL;
 749
 750         //curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarRequestHeader);
 751         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarEditURLAddress.c_str());
 752         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PROPPATCH");
 753         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 754         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &CalendarEditSendData);
 755         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 756
 757         // Process the data.
 758
 759         ServerData.clear();
 760         ServerHeader.clear();
 761
 762         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
 763
 764         if (ServerConnectionResult == CURLE_OK){
 765                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 766         } else {
 767                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 768         }
 769         ServerResult.Code = ServerConnectionResult;
 770         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
 771
 772         // Restore the original settings.
 773
 774         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 775         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 776         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 777         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 778         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 779         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 780
 781         return ServerResult;
 782
 783 }
 784
 785 CalDAVServerResult CalDAV::EditCalendar(string *CalendarHREF,
 786                         string *CalendarName,
 787                         Colour *CalendarColour,
 788                         string *CalendarDescription,
 789                         int *CalendarOrder){
 790
 791         CalDAVServerResult ServerResult;
 792
 793         ServerResult = EditCalendarProcess(CalendarHREF,
 794                 CalendarName,
 795                 CalendarColour,
 796                 CalendarDescription,
 797                 CalendarOrder);
 798
 799         return ServerResult;
 800
 801 }
 802
 803 CalDAVServerResult CalDAV::EditCalendar(string *CalendarHREF,
 804                         Colour *CalendarColour){
 805
 806
 807         CalDAVServerResult ServerResult;
 808
 809         ServerResult = EditCalendarProcess(CalendarHREF,
 810                 nullptr,
 811                 CalendarColour,
 812                 nullptr,
 813                 nullptr);
 814
 815         return ServerResult;
 816
 817 }
 818
 819 CalDAVServerResult CalDAV::EditCalendar(string *CalendarHREF,
 820                         string *CalendarName){
 821
 822         CalDAVServerResult ServerResult;
 823
 824         ServerResult = EditCalendarProcess(CalendarHREF,
 825                 CalendarName,
 826                 nullptr,
 827                 nullptr,
 828                 nullptr);
 829
 830         return ServerResult;
 831
 832 }
 833
 834 CalDAVServerResult CalDAV::EditCalendar(string *CalendarHREF,
 835                         int *CalendarOrder){
 836
 837         CalDAVServerResult ServerResult;
 838
 839         ServerResult = EditCalendarProcess(CalendarHREF,
 840                 nullptr,
 841                 nullptr,
 842                 nullptr,
 843                 CalendarOrder);
 844
 845         return ServerResult;
 846
 847 }
 848
 849 CalDAVServerResult CalDAV::EditCalendarDescription(string *CalendarHREF,
 850                         string *CalendarDescription){
 851
 852         CalDAVServerResult ServerResult;
 853
 854         ServerResult = EditCalendarProcess(CalendarHREF,
 855                 nullptr,
 856                 nullptr,
 857                 CalendarDescription,
 858                 nullptr);
 859
 860         return ServerResult;
 861
 862 }
 863
 864 CalDAVServerResult CalDAV::DeleteCalendar(string *CalendarHREF){
 865
 866         CalDAVServerResult ServerResult;
 867
 868         // Build the server address.
 869
 870         string UserPrincipalURI = "";
 871         UserPrincipalURI = GetUserPrincipal();
 872
 873         if (UserPrincipalURI.size() == 0){
 874
 875                 return ServerResult;
 876
 877         }
 878
 879         string CalendarHomeURI = "";
 880         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 881
 882         // Generate the UUID.
 883
 884         string UUIDValue = GenerateUUID();
 885         UUIDValue.erase(UUIDValue.end()-1);
 886
 887         string CalendarHomeURL = CalendarHomeURI;
 888         CalendarHomeURL.append(UUIDValue);
 889         CalendarHomeURL.append("/");
 890
 891         // Build the calendar list address.
 892
 893         struct curl_slist *DeleteRequestHeader = NULL;
 894
 895         DeleteRequestHeader = curl_slist_append(DeleteRequestHeader, "Depth: infinity");
 896
 897         string CalendarDeleteURLAddress = BuildServerAddress(&ConnectionData, (*CalendarHREF));
 898
 899         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, DeleteRequestHeader);
 900         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarDeleteURLAddress.c_str());
 901         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "DELETE");
 902
 903         // Delete the calendar.
 904
 905         ServerData.clear();
 906         ServerHeader.clear();
 907
 908         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
 909
 910         if (ServerConnectionResult == CURLE_OK){
 911                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 912         } else {
 913                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 914         }
 915         ServerResult.Code = ServerConnectionResult;
 916         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
 917
 918         // Restore the original settings.
 919
 920         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 921         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 922         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 923         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 924         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 925         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 926         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
 927
 928         return ServerResult;
 929
 930 }
 931
 932 CalDAVServerResult CalDAV::GetEntryETag(string *CalendarEntryHREF, string *ETagValue){
 933
 934         CalDAVServerResult ServerResult;
 935         CalDAVSendData EntryETagGetData;
 936
 937         // Build the server address.
 938
 939         string UserPrincipalURI = "";
 940         UserPrincipalURI = GetUserPrincipal();
 941
 942         if (UserPrincipalURI.size() == 0){
 943
 944                 return ServerResult;
 945
 946         }
 947
 948         string CalendarHomeURI = "";
 949         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 950
 951         // Split the path and filename.
 952
 953         string EntryURIPath;
 954         string EntryFilename;
 955
 956         SplitPathFilename(CalendarEntryHREF, &EntryURIPath, &EntryFilename);
 957
 958         // Build the request for the server.
 959
 960         string EntryETagRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 961         "<c:calendar-multiget xmlns:d=\"DAV:\" xmlns:c=\"urn:ietf:params:xml:ns:caldav\">\n"
 962         " <d:prop>\n"
 963         "  <d:getetag />\n"
 964         " </d:prop>\n"
 965         " <d:href>";
 966         EntryETagRequest += (*CalendarEntryHREF);
 967         EntryETagRequest += "</d:href>\n"
 968         "</c:calendar-multiget>";
 969
 970         EntryETagGetData.readptr = &EntryETagRequest;
 971         EntryETagGetData.sizeleft = EntryETagRequest.size();
 972
 973         // Build the calendar list address.
 974
 975         struct curl_slist *GetETagRequestHeader = NULL;
 976
 977         GetETagRequestHeader = curl_slist_append(GetETagRequestHeader, "Depth: 1");
 978         GetETagRequestHeader = curl_slist_append(GetETagRequestHeader, "Prefer: return-minimal");
 979         GetETagRequestHeader = curl_slist_append(GetETagRequestHeader, "Content-Type: application/xml; charset=utf-8");
 980
 981         string GetETagURLAddress = BuildServerAddress(&ConnectionData, EntryURIPath);
 982
 983         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, GetETagRequestHeader);
 984         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, GetETagURLAddress.c_str());
 985         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "REPORT");
 986         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 987         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &EntryETagGetData);
 988         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 989
 990         // Attempt to get the entity tag.
 991
 992         ServerData.clear();
 993         ServerHeader.clear();
 994
 995         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
 996
 997         if (ServerConnectionResult == CURLE_OK){
 998                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 999         } else {
1000                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
1001         }
1002         ServerResult.Code = ServerConnectionResult;
1003         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
1004
1005         if (ServerConnectionResult != CURLE_OK){
1006                 return ServerResult;
1007         }
1008
1009         // Get the entity tag from the result.
1010
1011         *ETagValue = ProcessXMLEntryETag();
1012
1013         // Restore the original settings.
1014
1015         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
1016         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
1017         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
1018         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
1019         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
1020         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
1021         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1022
1023         return ServerResult;
1024
1025 }
1026
1027 CalDAVServerResult CalDAV::AddEntry(string *CalendarEntryHREF, string *EntryData){
1028
1029         // Add an entry to the calendar collection.
1030
1031         CalDAVServerResult ServerResult;
1032         CalDAVSendData EntryAddSendData;
1033
1034         // Build the calendar list address.
1035
1036         string EntryAddURLAddress = BuildServerAddress(&ConnectionData, (*CalendarEntryHREF));
1037
1038         EntryAddSendData.readptr = EntryData;
1039         EntryAddSendData.sizeleft = EntryData->size();
1040
1041         struct curl_slist *CalendarRequestHeader = NULL;
1042
1043         CalendarRequestHeader = curl_slist_append(CalendarRequestHeader, "Content-Type: text/calendar; charset=utf-8");
1044
1045         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarRequestHeader);
1046         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, EntryAddURLAddress.c_str());
1047         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PUT");
1048         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
1049         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &EntryAddSendData);
1050         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
1051
1052         // Process the data.
1053
1054         ServerData.clear();
1055         ServerHeader.clear();
1056
1057         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
1058
1059         if (ServerConnectionResult == CURLE_OK){
1060                 ServerResult.Result = CALDAVQUERYRESULT_OK;
1061         } else {
1062                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
1063         }
1064         ServerResult.Code = ServerConnectionResult;
1065         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
1066
1067         // Restore the original settings.
1068
1069         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
1070         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
1071         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
1072         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
1073         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
1074         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
1075         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1076
1077         return ServerResult;
1078
1079 }
1080
1081 CalDAVServerResult CalDAV::EditEntry(string *CalendarEntryHREF, string *EntryData, string *EntryETag){
1082
1083         // Edit an entry in the calendar collection.
1084
1085         // Add an entry to the calendar collection.
1086
1087         CalDAVServerResult ServerResult;
1088         CalDAVSendData EntryAddSendData;
1089
1090         // Build the calendar list address.
1091
1092         string EntryAddURLAddress = BuildServerAddress(&ConnectionData, (*CalendarEntryHREF));
1093
1094         EntryAddSendData.readptr = EntryData;
1095         EntryAddSendData.sizeleft = EntryData->size();
1096
1097         string IfMatchHeader = "If-Match: \"";
1098         IfMatchHeader.append(*EntryETag);
1099         IfMatchHeader.append("\"");
1100
1101         struct curl_slist *CalendarRequestHeader = NULL;
1102
1103         CalendarRequestHeader = curl_slist_append(CalendarRequestHeader, "Content-Type: text/calendar; charset=utf-8");
1104         CalendarRequestHeader = curl_slist_append(CalendarRequestHeader, IfMatchHeader.c_str());
1105
1106         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarRequestHeader);
1107         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, EntryAddURLAddress.c_str());
1108         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PUT");
1109         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
1110         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &EntryAddSendData);
1111         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
1112
1113         // Process the data.
1114
1115         ServerData.clear();
1116         ServerHeader.clear();
1117
1118         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
1119
1120         if (ServerConnectionResult == CURLE_OK){
1121                 ServerResult.Result = CALDAVQUERYRESULT_OK;
1122         } else {
1123                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
1124         }
1125         ServerResult.Code = ServerConnectionResult;
1126         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
1127
1128         // Restore the original settings.
1129
1130         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
1131         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
1132         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
1133         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
1134         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
1135         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
1136         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1137
1138         return ServerResult;
1139
1140 }
1141
1142 CalDAVServerResult CalDAV::DeleteEntry(string *CalendarEntryHREF){
1143
1144         // Delete an entry in the calendar collection.
1145
1146         CalDAVServerResult ServerResult;
1147
1148         // Build the calendar list address.
1149
1150         string EntryDeleteURLAddress = BuildServerAddress(&ConnectionData, (*CalendarEntryHREF));
1151
1152         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1153         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, EntryDeleteURLAddress.c_str());
1154         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "DELETE");
1155
1156         // Delete the calendar.
1157
1158         ServerData.clear();
1159         ServerHeader.clear();
1160
1161         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
1162
1163         if (ServerConnectionResult == CURLE_OK){
1164                 ServerResult.Result = CALDAVQUERYRESULT_OK;
1165         } else {
1166                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
1167         }
1168         ServerResult.Code = ServerConnectionResult;
1169         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
1170
1171         // Restore the original settings.
1172
1173         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
1174         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
1175         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
1176         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
1177         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
1178         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
1179         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1180
1181         return ServerResult;
1182
1183 }
1184
1185 bool CalDAVObjectValidSettings(CalDAVConnectionData *ConnData){
1186
1187         // Check if the passed CalDAV Connection Data is has
1188         // an address set. Return false if nullptr is used.
1189
1190         if (ConnData == nullptr){
1191
1192                 return false;
1193
1194         }
1195
1196         // Check the server hostname. Return false
1197         // if no value has been set.
1198
1199         if (ConnData->Hostname.size() == 0){
1200
1201                 return false;
1202
1203         }
1204
1205         // Check the server port. Return false if
1206         // no value has been set or the port number
1207         // is less than 1 or higher than 65535.
1208
1209         if (ConnData->Port < 1 || ConnData->Port > 65535){
1210
1211                 return false;
1212
1213         }
1214
1215         // Check the server username. Return false
1216         // if no value has been set.
1217
1218         if (ConnData->Username.size() == 0){
1219
1220                 return false;
1221
1222         }
1223
1224         // Check the server password. Return false
1225         // if no value has been set.
1226
1227         if (ConnData->Password.size() == 0){
1228
1229                 return false;
1230
1231         }
1232
1233         // Cannot check UseSSL: It is either true
1234         // or false.
1235
1236         // Cannot check Prefix: The prefix may need
1237         // to be worked out first.
1238
1239         // No errors were found whilst checking so
1240         // return true.
1241
1242         return true;
1243
1244 }
1245
1246 string BuildServerAddress(CalDAVConnectionData *ConnData, string URIAddress){
1247
1248         string ServerAddress;
1249
1250         // Setup the server address.
1251
1252         if (ConnData->UseSSL == true){
1253                 ServerAddress += "https://";
1254         } else {
1255                 ServerAddress += "http://";
1256         }
1257
1258         ServerAddress += ConnData->Hostname;
1259
1260         // Check if server port is 80, otherwise
1261         // specifiy the port number in the address.
1262
1263         if (ConnData->Port != 80){
1264                 ServerAddress += ":";
1265                 ServerAddress += to_string(ConnData->Port);
1266         }
1267
1268         ServerAddress += URIAddress;
1269
1270         return ServerAddress;
1271
1272 }