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         "  <x0:calendar-color />\n"
 480         "  <x0:calendar-order />\n"
 481         "  <cs:getctag />\n"
 482         "  <c:supported-calendar-component-set />\n"
 483         "  <c:calendar-description />\n"
 484         " </d:prop>\n"
 485         "</d:propfind>";
 486
 487         CalendarListSendData.readptr = &CalendarListRequest;
 488         CalendarListSendData.sizeleft = CalendarListRequest.size();
 489
 490         // Setup the header.
 491
 492         struct curl_slist *CalendarListRequestHeader = NULL;
 493
 494         CalendarListRequestHeader = curl_slist_append(CalendarListRequestHeader, "Depth: 1");
 495         CalendarListRequestHeader = curl_slist_append(CalendarListRequestHeader, "Prefer: return-minimal");
 496         CalendarListRequestHeader = curl_slist_append(CalendarListRequestHeader, "Content-Type: application/xml; charset=utf-8");
 497
 498         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarListRequestHeader);
 499         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarListURLAddress.c_str());
 500         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PROPFIND");
 501         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 502         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &CalendarListSendData);
 503         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 504
 505         // Process the data.
 506
 507         ServerData.clear();
 508         ServerHeader.clear();
 509
 510         CURLcode ServerResult = curl_easy_perform(ConnectionHandle);
 511
 512         //ServerList = ProcessXMLCalendarList();
 513
 514         if (ServerResult == CURLE_OK){
 515                 ConnectionServerResult.Result = CALDAVQUERYRESULT_OK;
 516         } else {
 517                 ConnectionServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 518         }
 519         ConnectionServerResult.Code = ServerResult;
 520         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ConnectionServerResult.HTTPCode);
 521
 522         if (ServerResult != CURLE_OK){
 523
 524                 return ServerList;
 525
 526         }
 527
 528         // Process the received XML data into a list of calendars
 529         // and locations.
 530
 531         ServerList = ProcessXMLCalendarList();
 532
 533         // Restore the original settings.
 534
 535         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 536
 537         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 538         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 539         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 540         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 541         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 542
 543         return ServerList;
 544
 545 }
 546
 547 CalDAVServerResult CalDAV::AddCalendar(string CalendarName){
 548
 549         CalDAVServerResult ServerResult;
 550         CalDAVSendData CalendarAddSendData;
 551
 552         // Build the server address.
 553
 554         string UserPrincipalURI = "";
 555         UserPrincipalURI = GetUserPrincipal();
 556
 557         if (UserPrincipalURI.size() == 0){
 558
 559                 return ServerResult;
 560
 561         }
 562
 563         string CalendarHomeURI = "";
 564         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 565
 566         // Generate the UUID.
 567
 568         string UUIDValue = GenerateUUID();
 569         UUIDValue.erase(UUIDValue.end()-1);
 570
 571         string CalendarHomeURL = CalendarHomeURI;
 572         CalendarHomeURL.append(UUIDValue);
 573         CalendarHomeURL.append("/");
 574
 575         // Build the calendar list address.
 576
 577         string CalendarListURLAddress = BuildServerAddress(&ConnectionData, CalendarHomeURL);
 578
 579         string CalendarAddRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 580         "<c:mkcalendar xmlns:d=\"DAV:\" xmlns:c=\"urn:ietf:params:xml:ns:caldav\">\n"
 581         " <d:set>\n"
 582         "  <d:prop>\n"
 583         "   <d:displayname>";
 584         CalendarAddRequest += CalendarName;
 585         CalendarAddRequest += "</d:displayname>\n"
 586         "   <c:supported-calendar-component-set>\n"
 587         "    <c:comp name=\"VTODO\"/>\n"
 588         "    <c:comp name=\"VEVENT\"/>\n"
 589         "   </c:supported-calendar-component-set>\n"
 590         "  </d:prop>\n"
 591         " </d:set>\n"
 592         "</c:mkcalendar>";
 593
 594         CalendarAddSendData.readptr = &CalendarAddRequest;
 595         CalendarAddSendData.sizeleft = CalendarAddRequest.size();
 596
 597         // Setup the header.
 598
 599         struct curl_slist *CalendarRequestHeader = NULL;
 600
 601         //curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarRequestHeader);
 602         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarListURLAddress.c_str());
 603         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "MKCALENDAR");
 604         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 605         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &CalendarAddSendData);
 606         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 607
 608         // Process the data.
 609
 610         ServerData.clear();
 611         ServerHeader.clear();
 612
 613         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
 614
 615         if (ServerConnectionResult == CURLE_OK){
 616                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 617         } else {
 618                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 619         }
 620         ServerResult.Code = ServerConnectionResult;
 621         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
 622
 623         // Restore the original settings.
 624
 625         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 626         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 627         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 628         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 629         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 630         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 631
 632         return ServerResult;
 633
 634 }
 635
 636 CalDAVServerResult CalDAV::EditCalendarProcess(string *CalendarHREF,
 637                         string *CalendarName,
 638                         Colour *CalendarColour,
 639                         string *CalendarDescription,
 640                         int *CalendarOrder){
 641
 642         CalDAVServerResult ServerResult;
 643         CalDAVSendData CalendarEditSendData;
 644
 645         // Build the server address.
 646
 647         string UserPrincipalURI = "";
 648         UserPrincipalURI = GetUserPrincipal();
 649
 650         if (UserPrincipalURI.size() == 0){
 651
 652                 return ServerResult;
 653
 654         }
 655
 656         string CalendarHomeURI = "";
 657         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 658
 659         // Generate the UUID.
 660
 661         string UUIDValue = GenerateUUID();
 662         UUIDValue.erase(UUIDValue.end()-1);
 663
 664         string CalendarHomeURL = CalendarHomeURI;
 665         CalendarHomeURL.append(UUIDValue);
 666         CalendarHomeURL.append("/");
 667
 668         // Build the calendar list address.
 669
 670         string CalendarEditURLAddress = BuildServerAddress(&ConnectionData, (*CalendarHREF));
 671
 672         string CalendarEditRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 673         "<d:propertyupdate xmlns:d=\"DAV:\" xmlns:c=\"urn:ietf:params:xml:ns:caldav\"\n"
 674         "       xmlns:x0=\"http://apple.com/ns/ical/\">\n"
 675         " <d:set>\n"
 676         "  <d:prop>\n";
 677
 678         // Update the calendar name.
 679
 680         if (CalendarName != nullptr){
 681
 682                 CalendarEditRequest += "<d:displayname>";
 683                 CalendarEditRequest += (*CalendarName);
 684                 CalendarEditRequest += "</d:displayname>\n";
 685
 686         }
 687
 688         // Update the calendar colour.
 689
 690         if (CalendarColour != nullptr){
 691
 692                 CalendarEditRequest += "<x0:calendar-color>";
 693                 CalendarEditRequest += (*CalendarColour);
 694                 CalendarEditRequest += "</x0:calendar-color>\n";
 695
 696         }
 697
 698         // Update the calendar description.
 699
 700         if (CalendarDescription != nullptr){
 701
 702                 CalendarEditRequest += "<c:calendar-description>";
 703                 CalendarEditRequest += (*CalendarDescription);
 704                 CalendarEditRequest += "</c:calendar-description>\n";
 705
 706         }
 707
 708         // Update the calendar order.
 709
 710         if (CalendarOrder != nullptr){
 711
 712                 CalendarEditRequest += "<x0:calendar-order>";
 713                 CalendarEditRequest += to_string((*CalendarOrder));
 714                 CalendarEditRequest += "</x0:calendar-order>\n";
 715
 716         }
 717
 718         CalendarEditRequest += "  </d:prop>\n"
 719         " </d:set>\n"
 720         "</d:propertyupdate>";
 721
 722         CalendarEditSendData.readptr = &CalendarEditRequest;
 723         CalendarEditSendData.sizeleft = CalendarEditRequest.size();
 724
 725         // Setup the header.
 726
 727         struct curl_slist *CalendarRequestHeader = NULL;
 728
 729         //curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarRequestHeader);
 730         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarEditURLAddress.c_str());
 731         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PROPPATCH");
 732         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 733         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &CalendarEditSendData);
 734         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 735
 736         // Process the data.
 737
 738         ServerData.clear();
 739         ServerHeader.clear();
 740
 741         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
 742
 743         if (ServerConnectionResult == CURLE_OK){
 744                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 745         } else {
 746                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 747         }
 748         ServerResult.Code = ServerConnectionResult;
 749         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
 750
 751         // Restore the original settings.
 752
 753         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 754         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 755         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 756         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 757         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 758         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 759
 760         return ServerResult;
 761
 762 }
 763
 764 CalDAVServerResult CalDAV::EditCalendar(string *CalendarHREF,
 765                         string *CalendarName,
 766                         Colour *CalendarColour,
 767                         string *CalendarDescription,
 768                         int *CalendarOrder){
 769
 770         CalDAVServerResult ServerResult;
 771
 772         ServerResult = EditCalendarProcess(CalendarHREF,
 773                 CalendarName,
 774                 CalendarColour,
 775                 CalendarDescription,
 776                 CalendarOrder);
 777
 778         return ServerResult;
 779
 780 }
 781
 782 CalDAVServerResult CalDAV::EditCalendar(string *CalendarHREF,
 783                         Colour *CalendarColour){
 784
 785
 786         CalDAVServerResult ServerResult;
 787
 788         ServerResult = EditCalendarProcess(CalendarHREF,
 789                 nullptr,
 790                 CalendarColour,
 791                 nullptr,
 792                 nullptr);
 793
 794         return ServerResult;
 795
 796 }
 797
 798 CalDAVServerResult CalDAV::EditCalendar(string *CalendarHREF,
 799                         string *CalendarName){
 800
 801         CalDAVServerResult ServerResult;
 802
 803         ServerResult = EditCalendarProcess(CalendarHREF,
 804                 CalendarName,
 805                 nullptr,
 806                 nullptr,
 807                 nullptr);
 808
 809         return ServerResult;
 810
 811 }
 812
 813 CalDAVServerResult CalDAV::EditCalendar(string *CalendarHREF,
 814                         int *CalendarOrder){
 815
 816         CalDAVServerResult ServerResult;
 817
 818         ServerResult = EditCalendarProcess(CalendarHREF,
 819                 nullptr,
 820                 nullptr,
 821                 nullptr,
 822                 CalendarOrder);
 823
 824         return ServerResult;
 825
 826 }
 827
 828 CalDAVServerResult CalDAV::EditCalendarDescription(string *CalendarHREF,
 829                         string *CalendarDescription){
 830
 831         CalDAVServerResult ServerResult;
 832
 833         ServerResult = EditCalendarProcess(CalendarHREF,
 834                 nullptr,
 835                 nullptr,
 836                 CalendarDescription,
 837                 nullptr);
 838
 839         return ServerResult;
 840
 841 }
 842
 843 CalDAVServerResult CalDAV::DeleteCalendar(string *CalendarHREF){
 844
 845         CalDAVServerResult ServerResult;
 846
 847         // Build the server address.
 848
 849         string UserPrincipalURI = "";
 850         UserPrincipalURI = GetUserPrincipal();
 851
 852         if (UserPrincipalURI.size() == 0){
 853
 854                 return ServerResult;
 855
 856         }
 857
 858         string CalendarHomeURI = "";
 859         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 860
 861         // Generate the UUID.
 862
 863         string UUIDValue = GenerateUUID();
 864         UUIDValue.erase(UUIDValue.end()-1);
 865
 866         string CalendarHomeURL = CalendarHomeURI;
 867         CalendarHomeURL.append(UUIDValue);
 868         CalendarHomeURL.append("/");
 869
 870         // Build the calendar list address.
 871
 872         struct curl_slist *DeleteRequestHeader = NULL;
 873
 874         DeleteRequestHeader = curl_slist_append(DeleteRequestHeader, "Depth: infinity");
 875
 876         string CalendarDeleteURLAddress = BuildServerAddress(&ConnectionData, (*CalendarHREF));
 877
 878         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, DeleteRequestHeader);
 879         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, CalendarDeleteURLAddress.c_str());
 880         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "DELETE");
 881
 882         // Delete the calendar.
 883
 884         ServerData.clear();
 885         ServerHeader.clear();
 886
 887         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
 888
 889         if (ServerConnectionResult == CURLE_OK){
 890                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 891         } else {
 892                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 893         }
 894         ServerResult.Code = ServerConnectionResult;
 895         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
 896
 897         // Restore the original settings.
 898
 899         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 900         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 901         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 902         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 903         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 904         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
 905         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
 906
 907         return ServerResult;
 908
 909 }
 910
 911 CalDAVServerResult CalDAV::GetEntryETag(string *CalendarEntryHREF, string *ETagValue){
 912
 913         CalDAVServerResult ServerResult;
 914         CalDAVSendData EntryETagGetData;
 915
 916         // Build the server address.
 917
 918         string UserPrincipalURI = "";
 919         UserPrincipalURI = GetUserPrincipal();
 920
 921         if (UserPrincipalURI.size() == 0){
 922
 923                 return ServerResult;
 924
 925         }
 926
 927         string CalendarHomeURI = "";
 928         CalendarHomeURI = GetCalendarHome(UserPrincipalURI);
 929
 930         // Split the path and filename.
 931
 932         string EntryURIPath;
 933         string EntryFilename;
 934
 935         SplitPathFilename(CalendarEntryHREF, &EntryURIPath, &EntryFilename);
 936
 937         // Build the request for the server.
 938
 939         string EntryETagRequest = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 940         "<c:calendar-multiget xmlns:d=\"DAV:\" xmlns:c=\"urn:ietf:params:xml:ns:caldav\">\n"
 941         " <d:prop>\n"
 942         "  <d:getetag />\n"
 943         " </d:prop>\n"
 944         " <d:href>";
 945         EntryETagRequest += (*CalendarEntryHREF);
 946         EntryETagRequest += "</d:href>\n"
 947         "</c:calendar-multiget>";
 948
 949         EntryETagGetData.readptr = &EntryETagRequest;
 950         EntryETagGetData.sizeleft = EntryETagRequest.size();
 951
 952         // Build the calendar list address.
 953
 954         struct curl_slist *GetETagRequestHeader = NULL;
 955
 956         GetETagRequestHeader = curl_slist_append(GetETagRequestHeader, "Depth: 1");
 957         GetETagRequestHeader = curl_slist_append(GetETagRequestHeader, "Prefer: return-minimal");
 958         GetETagRequestHeader = curl_slist_append(GetETagRequestHeader, "Content-Type: application/xml; charset=utf-8");
 959
 960         string GetETagURLAddress = BuildServerAddress(&ConnectionData, EntryURIPath);
 961
 962         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, GetETagRequestHeader);
 963         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, GetETagURLAddress.c_str());
 964         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "REPORT");
 965         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
 966         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &EntryETagGetData);
 967         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
 968
 969         // Attempt to get the entity tag.
 970
 971         ServerData.clear();
 972         ServerHeader.clear();
 973
 974         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
 975
 976         if (ServerConnectionResult == CURLE_OK){
 977                 ServerResult.Result = CALDAVQUERYRESULT_OK;
 978         } else {
 979                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
 980         }
 981         ServerResult.Code = ServerConnectionResult;
 982         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
 983
 984         if (ServerConnectionResult != CURLE_OK){
 985                 return ServerResult;
 986         }
 987
 988         // Get the entity tag from the result.
 989
 990         *ETagValue = ProcessXMLEntryETag();
 991
 992         // Restore the original settings.
 993
 994         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
 995         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
 996         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
 997         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
 998         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
 999         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
1000         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1001
1002         return ServerResult;
1003
1004 }
1005
1006 CalDAVServerResult CalDAV::AddEntry(string *CalendarEntryHREF, string *EntryData){
1007
1008         // Add an entry to the calendar collection.
1009
1010         CalDAVServerResult ServerResult;
1011         CalDAVSendData EntryAddSendData;
1012
1013         // Build the calendar list address.
1014
1015         string EntryAddURLAddress = BuildServerAddress(&ConnectionData, (*CalendarEntryHREF));
1016
1017         EntryAddSendData.readptr = EntryData;
1018         EntryAddSendData.sizeleft = EntryData->size();
1019
1020         struct curl_slist *CalendarRequestHeader = NULL;
1021
1022         CalendarRequestHeader = curl_slist_append(CalendarRequestHeader, "Content-Type: text/calendar; charset=utf-8");
1023
1024         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, CalendarRequestHeader);
1025         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, EntryAddURLAddress.c_str());
1026         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "PUT");
1027         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 1L);
1028         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, &EntryAddSendData);
1029         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, CalDAVSend);
1030
1031         // Process the data.
1032
1033         ServerData.clear();
1034         ServerHeader.clear();
1035
1036         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
1037
1038         if (ServerConnectionResult == CURLE_OK){
1039                 ServerResult.Result = CALDAVQUERYRESULT_OK;
1040         } else {
1041                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
1042         }
1043         ServerResult.Code = ServerConnectionResult;
1044         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
1045
1046         // Restore the original settings.
1047
1048         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
1049         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
1050         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
1051         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
1052         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
1053         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
1054         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1055
1056         return ServerResult;
1057
1058 }
1059
1060 CalDAVServerResult CalDAV::DeleteEntry(string *CalendarEntryHREF){
1061
1062         // Delete an entry in the calendar collection.
1063
1064         CalDAVServerResult ServerResult;
1065
1066         // Build the calendar list address.
1067
1068         string EntryDeleteURLAddress = BuildServerAddress(&ConnectionData, (*CalendarEntryHREF));
1069
1070         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1071         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, EntryDeleteURLAddress.c_str());
1072         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, "DELETE");
1073
1074         // Delete the calendar.
1075
1076         ServerData.clear();
1077         ServerHeader.clear();
1078
1079         CURLcode ServerConnectionResult = curl_easy_perform(ConnectionHandle);
1080
1081         if (ServerConnectionResult == CURLE_OK){
1082                 ServerResult.Result = CALDAVQUERYRESULT_OK;
1083         } else {
1084                 ServerResult.Result = CALDAVQUERYRESULT_SERVERERROR;
1085         }
1086         ServerResult.Code = ServerConnectionResult;
1087         curl_easy_getinfo(ConnectionHandle, CURLINFO_RESPONSE_CODE, &ServerResult.HTTPCode);
1088
1089         // Restore the original settings.
1090
1091         string OriginalServerAddress = BuildServerAddress(&ConnectionData, "/principals/");
1092         curl_easy_setopt(ConnectionHandle, CURLOPT_URL, OriginalServerAddress.c_str());
1093         curl_easy_setopt(ConnectionHandle, CURLOPT_CUSTOMREQUEST, NULL);
1094         curl_easy_setopt(ConnectionHandle, CURLOPT_UPLOAD, 0L);
1095         curl_easy_setopt(ConnectionHandle, CURLOPT_READDATA, NULL);
1096         curl_easy_setopt(ConnectionHandle, CURLOPT_READFUNCTION, NULL);
1097         curl_easy_setopt(ConnectionHandle, CURLOPT_HTTPHEADER, NULL);
1098
1099         return ServerResult;
1100
1101 }
1102
1103 bool CalDAVObjectValidSettings(CalDAVConnectionData *ConnData){
1104
1105         // Check if the passed CalDAV Connection Data is has
1106         // an address set. Return false if nullptr is used.
1107
1108         if (ConnData == nullptr){
1109
1110                 return false;
1111
1112         }
1113
1114         // Check the server hostname. Return false
1115         // if no value has been set.
1116
1117         if (ConnData->Hostname.size() == 0){
1118
1119                 return false;
1120
1121         }
1122
1123         // Check the server port. Return false if
1124         // no value has been set or the port number
1125         // is less than 1 or higher than 65535.
1126
1127         if (ConnData->Port < 1 || ConnData->Port > 65535){
1128
1129                 return false;
1130
1131         }
1132
1133         // Check the server username. Return false
1134         // if no value has been set.
1135
1136         if (ConnData->Username.size() == 0){
1137
1138                 return false;
1139
1140         }
1141
1142         // Check the server password. Return false
1143         // if no value has been set.
1144
1145         if (ConnData->Password.size() == 0){
1146
1147                 return false;
1148
1149         }
1150
1151         // Cannot check UseSSL: It is either true
1152         // or false.
1153
1154         // Cannot check Prefix: The prefix may need
1155         // to be worked out first.
1156
1157         // No errors were found whilst checking so
1158         // return true.
1159
1160         return true;
1161
1162 }
1163
1164 string BuildServerAddress(CalDAVConnectionData *ConnData, string URIAddress){
1165
1166         string ServerAddress;
1167
1168         // Setup the server address.
1169
1170         if (ConnData->UseSSL == true){
1171                 ServerAddress += "https://";
1172         } else {
1173                 ServerAddress += "http://";
1174         }
1175
1176         ServerAddress += ConnData->Hostname;
1177
1178         // Check if server port is 80, otherwise
1179         // specifiy the port number in the address.
1180
1181         if (ConnData->Port != 80){
1182                 ServerAddress += ":";
1183                 ServerAddress += to_string(ConnData->Port);
1184         }
1185
1186         ServerAddress += URIAddress;
1187
1188         return ServerAddress;
1189
1190 }