src/client/main.c

   1 /*
   2  * OpenDispense 2
   3  * UCC (University [of WA] Computer Club) Electronic Accounting System
   4  * - Dispense Client
   5  *
   6  * main.c - Core and Initialisation
   7  *
   8  * This file is licenced under the 3-clause BSD Licence. See the file
   9  * COPYING for full details.
  10  */
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include <ctype.h>      // isspace
  15 #include <stdarg.h>
  16 #include <regex.h>
  17 #include <ncurses.h>
  18 #include <limits.h>
  19
  20 #include <unistd.h>     // close
  21 #include <netdb.h>      // gethostbyname
  22 #include <pwd.h>        // getpwuids
  23 #include <sys/socket.h>
  24 #include <netinet/in.h>
  25 #include <arpa/inet.h>
  26 #include <openssl/sha.h>        // SHA1
  27
  28 #define USE_NCURSES_INTERFACE   0
  29 #define DEBUG_TRACE_SERVER      0
  30 #define USE_AUTOAUTH    1
  31
  32 enum eUI_Modes
  33 {
  34         UI_MODE_BASIC,  // Non-NCurses
  35         UI_MODE_STANDARD,
  36         UI_MODE_DRINKSONLY,
  37         UI_MODE_ALL,
  38         NUM_UI_MODES
  39 };
  40
  41 // === TYPES ===
  42 typedef struct sItem {
  43         char    *Type;
  44          int    ID;
  45         char    *Desc;
  46          int    Price;
  47 }       tItem;
  48
  49 // === PROTOTYPES ===
  50  int    main(int argc, char *argv[]);
  51 void    ShowUsage(void);
  52 // --- GUI ---
  53  int    ShowNCursesUI(void);
  54  int    ShowItemAt(int Row, int Col, int Width, int Index);
  55 void    PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1, const char *Mid, char Pad2, const char *Right, ...);
  56 // --- Coke Server Communication ---
  57  int    OpenConnection(const char *Host, int Port);
  58  int    Authenticate(int Socket);
  59  int    GetUserBalance(int Socket);
  60 void    PopulateItemList(int Socket);
  61  int    Dispense_ItemInfo(int Socket, const char *Type, int ID);
  62  int    DispenseItem(int Socket, const char *Type, int ID);
  63  int    Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason);
  64  int    Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason);
  65  int    Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason);
  66  int    Dispense_Donate(int Socket, int Ammount, const char *Reason);
  67  int    Dispense_EnumUsers(int Socket);
  68  int    Dispense_ShowUser(int Socket, const char *Username);
  69 void    _PrintUserLine(const char *Line);
  70  int    Dispense_AddUser(int Socket, const char *Username);
  71  int    Dispense_SetUserType(int Socket, const char *Username, const char *TypeString);
  72 // --- Helpers ---
  73 char    *ReadLine(int Socket);
  74  int    sendf(int Socket, const char *Format, ...);
  75 char    *trim(char *string);
  76  int    RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage);
  77 void    CompileRegex(regex_t *regex, const char *pattern, int flags);
  78
  79 // === GLOBALS ===
  80 char    *gsDispenseServer = "heathred";
  81  int    giDispensePort = 11020;
  82
  83 tItem   *gaItems;
  84  int    giNumItems;
  85 regex_t gArrayRegex, gItemRegex, gSaltRegex, gUserInfoRegex, gUserItemIdentRegex;
  86  int    gbIsAuthenticated = 0;
  87
  88 char    *gsItemPattern; //!< Item pattern
  89 char    *gsEffectiveUser;       //!< '-u' Dispense as another user
  90  int    giUIMode = UI_MODE_STANDARD;
  91  int    gbDryRun = 0;   //!< '-n' Read-only
  92  int    giMinimumBalance = INT_MIN;     //!< '-m' Minumum balance for `dispense acct`
  93  int    giMaximumBalance = INT_MAX;     //!< '-M' Maximum balance for `dispense acct`
  94 char    *gsUserName;    //!< User that dispense will happen as
  95 char    *gsUserFlags;   //!< User's flag set
  96  int    giUserBalance=-1;       //!< User balance (set by Authenticate)
  97
  98 // === CODE ===
  99 int main(int argc, char *argv[])
 100 {
 101          int    sock;
 102          int    i;
 103         char    buffer[BUFSIZ];
 104
 105         // -- Create regular expressions
 106         // > Code Type Count ...
 107         CompileRegex(&gArrayRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([0-9]+)", REG_EXTENDED);     //
 108         // > Code Type Ident Price Desc
 109         CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z]+):([0-9]+)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
 110         // > Code 'SALT' salt
 111         CompileRegex(&gSaltRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+(.+)$", REG_EXTENDED);
 112         // > Code 'User' Username Balance Flags
 113         CompileRegex(&gUserInfoRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([^ ]+)\\s+(-?[0-9]+)\\s+(.+)$", REG_EXTENDED);
 114         // > Item Ident
 115         CompileRegex(&gUserItemIdentRegex, "^([A-Za-z]+):([0-9]+)$", REG_EXTENDED);
 116
 117         // Parse Arguments
 118         for( i = 1; i < argc; i ++ )
 119         {
 120                 char    *arg = argv[i];
 121
 122                 if( arg[0] == '-' )
 123                 {
 124                         switch(arg[1])
 125                         {
 126                         case 'h':
 127                         case '?':
 128                                 ShowUsage();
 129                                 return 0;
 130
 131                         case 'm':       // Minimum balance
 132                                 if( i + 1 >= argc ) {
 133                                         fprintf(stderr, "%s: -m takes an argument\n", argv[0]);
 134                                         ShowUsage();
 135                                 }
 136                                 giMinimumBalance = atoi(argv[++i]);
 137                                 break;
 138                         case 'M':       // Maximum balance
 139                                 if( i + 1 >= argc ) {
 140                                         fprintf(stderr, "%s: -M takes an argument\n", argv[0]);
 141                                         ShowUsage();
 142                                 }
 143                                 giMaximumBalance = atoi(argv[++i]);
 144                                 break;
 145
 146                         case 'u':       // Override User
 147                                 if( i + 1 >= argc ) {
 148                                         fprintf(stderr, "%s: -u takes an argument\n", argv[0]);
 149                                         ShowUsage();
 150                                 }
 151                                 gsEffectiveUser = argv[++i];
 152                                 break;
 153
 154                         case 'H':       // Override remote host
 155                                 if( i + 1 >= argc ) {
 156                                         fprintf(stderr, "%s: -H takes an argument\n", argv[0]);
 157                                         ShowUsage();
 158                                 }
 159                                 gsDispenseServer = argv[++i];
 160                                 break;
 161                         case 'P':       // Override remote port
 162                                 if( i + 1 >= argc ) {
 163                                         fprintf(stderr, "%s: -P takes an argument\n", argv[0]);
 164                                         ShowUsage();
 165                                 }
 166                                 giDispensePort = atoi(argv[++i]);
 167                                 break;
 168
 169                         case 'G':       // Don't use GUI
 170                                 giUIMode = UI_MODE_BASIC;
 171                                 break;
 172                         case 'D':       // Drinks only
 173                                 giUIMode = UI_MODE_DRINKSONLY;
 174                                 break;
 175                         case 'n':       // Dry Run / read-only
 176                                 gbDryRun = 1;
 177                                 break;
 178                         }
 179
 180                         continue;
 181                 }
 182
 183                 //
 184                 // `dispense acct`
 185                 // -
 186                 if( strcmp(arg, "acct") == 0 )
 187                 {
 188                         // Connect to server
 189                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 190                         if( sock < 0 )  return -1;
 191
 192                         // List accounts?
 193                         if( i + 1 == argc ) {
 194                                 Dispense_EnumUsers(sock);
 195                                 return 0;
 196                         }
 197
 198                         // argv[i+1]: Username
 199
 200                         // Alter account?
 201                         if( i + 2 < argc )
 202                         {
 203                                 if( i + 3 >= argc ) {
 204                                         fprintf(stderr, "Error: `dispense acct' needs a reason\n");
 205                                         exit(1);
 206                                 }
 207
 208                                 // Authentication required
 209                                 if( Authenticate(sock) )
 210                                         return -1;
 211
 212                                 // argv[i+1]: Username
 213                                 // argv[i+2]: Ammount
 214                                 // argv[i+3]: Reason
 215
 216                                 if( argv[i+2][0] == '=' ) {
 217                                         // Set balance
 218                                         if( argv[i+2][1] != '0' && atoi(&argv[i+2][1]) == 0 ) {
 219                                                 fprintf(stderr, "Error: Invalid balance to be set\n");
 220                                                 exit(1);
 221                                         }
 222
 223                                         Dispense_SetBalance(sock, argv[i+1], atoi(argv[i+2]+1), argv[i+3]);
 224                                 }
 225                                 else {
 226                                         // Alter balance
 227                                         Dispense_AlterBalance(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
 228                                 }
 229                         }
 230
 231                         // Show user information
 232                         Dispense_ShowUser(sock, argv[i+1]);
 233
 234                         close(sock);
 235                         return 0;
 236                 }
 237                 //
 238                 // `dispense give`
 239                 // - "Here, have some money."
 240                 if( strcmp(arg, "give") == 0 )
 241                 {
 242                         if( i + 3 >= argc ) {
 243                                 fprintf(stderr, "`dispense give` takes three arguments\n");
 244                                 ShowUsage();
 245                                 return -1;
 246                         }
 247
 248                         // argv[i+1]: Destination
 249                         // argv[i+2]: Ammount
 250                         // argv[i+3]: Reason
 251
 252                         // Connect to server
 253                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 254                         if( sock < 0 )  return -1;
 255
 256                         // Authenticate
 257                         if( Authenticate(sock) )
 258                                 return -1;
 259
 260                         Dispense_Give(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
 261                         return 0;
 262                 }
 263                 //
 264                 // `dispense user`
 265                 // - User administration (Admin Only)
 266                 if( strcmp(arg, "user") == 0 )
 267                 {
 268                         // Check argument count
 269                         if( i + 1 >= argc ) {
 270                                 fprintf(stderr, "Error: `dispense user` requires arguments\n");
 271                                 ShowUsage();
 272                                 exit(1);
 273                         }
 274
 275                         // Connect to server
 276                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 277                         if( sock < 0 )  return -1;
 278
 279                         // Attempt authentication
 280                         if( Authenticate(sock) )
 281                                 return -1;
 282
 283                         // Add new user?
 284                         if( strcmp(argv[i+1], "add") == 0 )
 285                         {
 286                                 if( i + 2 >= argc ) {
 287                                         fprintf(stderr, "Error: `dispense user add` requires an argument\n");
 288                                         ShowUsage();
 289                                         exit(1);
 290                                 }
 291
 292                                 Dispense_AddUser(sock, argv[i+2]);
 293                         }
 294                         // Update a user
 295                         else if( strcmp(argv[i+1], "type") == 0 )
 296                         {
 297                                 if( i + 3 >= argc ) {
 298                                         fprintf(stderr, "Error: `dispense user type` requires two arguments\n");
 299                                         ShowUsage();
 300                                         exit(1);
 301                                 }
 302
 303                                 Dispense_SetUserType(sock, argv[i+2], argv[i+3]);
 304                         }
 305                         else
 306                         {
 307                                 fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
 308                                 ShowUsage();
 309                                 exit(1);
 310                         }
 311                         return 0;
 312                 }
 313
 314                 // Donation!
 315                 if( strcmp(arg, "donate") == 0 )
 316                 {
 317                         // Check argument count
 318                         if( i + 2 >= argc ) {
 319                                 fprintf(stderr, "Error: `dispense donate` requires two arguments\n");
 320                                 ShowUsage();
 321                                 exit(1);
 322                         }
 323
 324                         // Connect to server
 325                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 326                         if( sock < 0 )  return -1;
 327
 328                         // Attempt authentication
 329                         if( Authenticate(sock) )
 330                                 return -1;
 331
 332                         // Do donation
 333                         Dispense_Donate(sock, atoi(argv[i+1]), argv[i+1]);
 334
 335                         return 0;
 336                 }
 337
 338                 else {
 339                         // Item name / pattern
 340                         gsItemPattern = arg;
 341                         break;
 342                 }
 343         }
 344
 345         // Connect to server
 346         sock = OpenConnection(gsDispenseServer, giDispensePort);
 347         if( sock < 0 )  return -1;
 348
 349         // Get the user's balance
 350         GetUserBalance(sock);
 351
 352         // Get items
 353         PopulateItemList(sock);
 354
 355         // Disconnect from server
 356         close(sock);
 357
 358         if( gsItemPattern )
 359         {
 360                 regmatch_t matches[3];
 361                 // Door (hard coded)
 362                 if( strcmp(gsItemPattern, "door") == 0 )
 363                 {
 364                         // Connect, Authenticate, dispense and close
 365                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 366                         if( sock < 0 )  return -1;
 367                         Authenticate(sock);
 368                         DispenseItem(sock, "door", 0);
 369                         close(sock);
 370                         return 0;
 371                 }
 372                 // Item id (<type>:<num>)
 373                 else if( RunRegex(&gUserItemIdentRegex, gsItemPattern, 3, matches, NULL) == 0 )
 374                 {
 375                         char    *ident;
 376                          int    id;
 377
 378                         // Get and finish ident
 379                         ident = gsItemPattern + matches[1].rm_so;
 380                         gsItemPattern[matches[1].rm_eo] = '\0';
 381                         // Get ID
 382                         id = atoi( gsItemPattern + matches[2].rm_so );
 383
 384                         // Connect, Authenticate, dispense and close
 385                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 386                         if( sock < 0 )  return -1;
 387
 388                         Dispense_ItemInfo(sock, ident, id);
 389
 390                         Authenticate(sock);
 391                         DispenseItem(sock, ident, id);
 392                         close(sock);
 393                         return 0;
 394                 }
 395                 // Item number (6 = coke)
 396                 else if( strcmp(gsItemPattern, "0") == 0 || atoi(gsItemPattern) > 0 )
 397                 {
 398                         i = atoi(gsItemPattern);
 399                 }
 400                 // Item prefix
 401                 else
 402                 {
 403                          int    j;
 404                          int    best = -1;
 405                         for( i = 0; i < giNumItems; i ++ )
 406                         {
 407                                 // Prefix match (with case-insensitive match)
 408                                 for( j = 0; gsItemPattern[j]; j ++ )
 409                                 {
 410                                         if( gaItems[i].Desc[j] == gsItemPattern[j] )
 411                                                 continue;
 412                                         if( tolower(gaItems[i].Desc[j]) == tolower(gsItemPattern[j]) )
 413                                                 continue;
 414                                         break;
 415                                 }
 416                                 // Check if the prefix matched
 417                                 if( gsItemPattern[j] != '\0' )
 418                                         continue;
 419
 420                                 // Prefect match
 421                                 if( gaItems[i].Desc[j] == '\0' ) {
 422                                         best = i;
 423                                         break;
 424                                 }
 425
 426                                 // Only one match allowed
 427                                 if( best == -1 ) {
 428                                         best = i;
 429                                 }
 430                                 else {
 431                                         // TODO: Allow ambiguous matches?
 432                                         // or just print a wanrning
 433                                         printf("Warning - Ambiguous pattern, stopping\n");
 434                                         return 1;
 435                                 }
 436                         }
 437
 438                         // Was a match found?
 439                         if( best == -1 )
 440                         {
 441                                 fprintf(stderr, "No item matches the passed string\n");
 442                                 return 1;
 443                         }
 444
 445                         i = best;
 446                 }
 447         }
 448         else if( giUIMode != UI_MODE_BASIC )
 449         {
 450                 i = ShowNCursesUI();
 451         }
 452         else
 453         {
 454                 // Very basic dispense interface
 455                 for( i = 0; i < giNumItems; i ++ ) {
 456                         // Add a separator
 457                         if( i && strcmp(gaItems[i].Type, gaItems[i-1].Type) != 0 )
 458                                 printf("   ---\n");
 459
 460                         printf("%2i %s:%i\t%3i %s\n", i, gaItems[i].Type, gaItems[i].ID,
 461                                 gaItems[i].Price, gaItems[i].Desc);
 462                 }
 463                 printf(" q Quit\n");
 464                 for(;;)
 465                 {
 466                         char    *buf;
 467
 468                         i = -1;
 469
 470                         fgets(buffer, BUFSIZ, stdin);
 471
 472                         buf = trim(buffer);
 473
 474                         if( buf[0] == 'q' )     break;
 475
 476                         i = atoi(buf);
 477
 478                         if( i != 0 || buf[0] == '0' )
 479                         {
 480                                 if( i < 0 || i >= giNumItems ) {
 481                                         printf("Bad item %i (should be between 0 and %i)\n", i, giNumItems);
 482                                         continue;
 483                                 }
 484                                 break;
 485                         }
 486                 }
 487         }
 488
 489
 490         // Check for a valid item ID
 491         if( i >= 0 )
 492         {
 493                 // Connect, Authenticate, dispense and close
 494                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 495                 if( sock < 0 )  return -1;
 496
 497                 Dispense_ItemInfo(sock, gaItems[i].Type, gaItems[i].ID);
 498
 499                 Authenticate(sock);
 500                 DispenseItem(sock, gaItems[i].Type, gaItems[i].ID);
 501                 close(sock);
 502         }
 503
 504         return 0;
 505 }
 506
 507 void ShowUsage(void)
 508 {
 509         printf(
 510                 "Usage:\n"
 511                 "  == Everyone ==\n"
 512                 "    dispense\n"
 513                 "        Show interactive list\n"
 514                 "    dispense <item>\n"
 515                 "        Dispense named item\n"
 516                 "    dispense give <user> <ammount> \"<reason>\"\n"
 517                 "        Give money to another user\n"
 518                 "    dispense donate <ammount> \"<reason>\"\n"
 519                 "        Donate to the club\n"
 520                 "  == Coke members == \n"
 521                 "    dispense acct [<user>]\n"
 522                 "        Show user balances\n"
 523                 "    dispense acct <user> [+-]<ammount> \"<reason>\"\n"
 524                 "        Alter a account value\n"
 525                 "  == Dispense administrators ==\n"
 526                 "    dispense acct <user> =<ammount> \"<reason>\"\n"
 527                 "        Set an account balance\n"
 528                 "    dispense user add <user>\n"
 529                 "        Create new coke account (Admins only)\n"
 530                 "    dispense user type <user> <flags>\n"
 531                 "        Alter a user's flags\n"
 532                 "        <flags> is a comma-separated list of user, coke, admin or disabled\n"
 533                 "        Flags are removed by preceding the name with '-' or '!'\n"
 534                 "\n"
 535                 "General Options:\n"
 536                 "    -u <username>\n"
 537                 "        Set a different user (Coke members only)\n"
 538                 "    -h / -?\n"
 539                 "        Show help text\n"
 540                 "    -G\n"
 541                 "        Use alternate GUI\n"
 542                 "    -m <min balance>\n"
 543                 "    -M <max balance>\n"
 544                 "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
 545                 );
 546 }
 547
 548 // -------------------
 549 // --- NCurses GUI ---
 550 // -------------------
 551 /**
 552  * \brief Render the NCurses UI
 553  */
 554 int ShowNCursesUI(void)
 555 {
 556         // TODO: ncurses interface (with separation between item classes)
 557         // - Hmm... that would require standardising the item ID to be <class>:<index>
 558         // Oh, why not :)
 559          int    ch;
 560          int    i, times;
 561          int    xBase, yBase;
 562         const int       displayMinWidth = 40;
 563         char    *titleString = "Dispense";
 564          int    itemCount;
 565          int    maxItemIndex;
 566          int    itemBase = 0;
 567          int    currentItem = 0;
 568          int    ret = -2;       // -2: Used for marking "no return yet"
 569
 570         char    balance_str[5+1+2+1];   // If $9999.99 is too little, something's wrong
 571         char    *username;
 572         struct passwd *pwd;
 573
 574          int    height, width;
 575
 576         // Get Username
 577         if( gsEffectiveUser )
 578                 username = gsEffectiveUser;
 579         else {
 580                 pwd = getpwuid( getuid() );
 581                 username = pwd->pw_name;
 582         }
 583         // Get balance
 584         snprintf(balance_str, sizeof balance_str, "$%i.%02i", giUserBalance/100, giUserBalance%100);
 585
 586         // Enter curses mode
 587         initscr();
 588         raw(); noecho();
 589
 590         // Get max index
 591         maxItemIndex = ShowItemAt(0, 0, 0, -1);
 592         // Get item count per screen
 593         // - 6: randomly chosen (Need at least 3)
 594         itemCount = LINES - 6;
 595         if( itemCount > maxItemIndex )
 596                 itemCount = maxItemIndex;
 597         // Get first index
 598         while( ShowItemAt(0, 0, 0, currentItem) == -1 )
 599                 currentItem ++;
 600
 601
 602         // Get dimensions
 603         height = itemCount + 3;
 604         width = displayMinWidth;
 605
 606         // Get positions
 607         xBase = COLS/2 - width/2;
 608         yBase = LINES/2 - height/2;
 609
 610         for( ;; )
 611         {
 612                 // Header
 613                 PrintAlign(yBase, xBase, width, "/", '-', titleString, '-', "\\");
 614
 615                 // Items
 616                 for( i = 0; i < itemCount; i ++ )
 617                 {
 618                          int    pos = 0;
 619
 620                         move( yBase + 1 + i, xBase );
 621
 622                         if( currentItem == itemBase + i ) {
 623                                 printw("| ->");
 624                         }
 625                         else {
 626                                 printw("|   ");
 627                         }
 628                         pos += 4;
 629
 630                         // Check for the '...' row
 631                         // - Oh god, magic numbers!
 632                         if( (i == 0 && itemBase > 0)
 633                          || (i == itemCount - 1 && itemBase < maxItemIndex - itemCount) )
 634                         {
 635                                 printw("   ...");       pos += 6;
 636                                 times = (width - pos) - 1;
 637                                 //times = width-1 - 8 - 3;
 638                                 while(times--)  addch(' ');
 639                         }
 640                         // Show an item
 641                         else {
 642                                 ShowItemAt( yBase + 1 + i, xBase + pos, (width - pos) - 3, itemBase + i);
 643                                 printw("  ");
 644                         }
 645
 646                         // Scrollbar (if needed)
 647                         if( maxItemIndex > itemCount ) {
 648                                 if( i == 0 ) {
 649                                         addch('A');
 650                                 }
 651                                 else if( i == itemCount - 1 ) {
 652                                         addch('V');
 653                                 }
 654                                 else {
 655                                          int    percentage = itemBase * 100 / (maxItemIndex-itemCount);
 656                                         if( i-1 == percentage*(itemCount-3)/100 ) {
 657                                                 addch('#');
 658                                         }
 659                                         else {
 660                                                 addch('|');
 661                                         }
 662                                 }
 663                         }
 664                         else {
 665                                 addch('|');
 666                         }
 667                 }
 668
 669                 // Footer
 670                 PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
 671
 672                 // User line
 673                 // - Username, balance, flags
 674                 PrintAlign(yBase+height-1, xBase+1, width-2,
 675                         username, ' ', balance_str, ' ', gsUserFlags);
 676
 677
 678                 // Get input
 679                 ch = getch();
 680
 681                 if( ch == '\x1B' ) {
 682                         ch = getch();
 683                         if( ch == '[' ) {
 684                                 ch = getch();
 685
 686                                 switch(ch)
 687                                 {
 688                                 case 'B':
 689                                         currentItem ++;
 690                                         // Skip over spacers
 691                                         while( ShowItemAt(0, 0, 0, currentItem) == -1 )
 692                                                 currentItem ++;
 693
 694                                         if( currentItem >= maxItemIndex ) {
 695                                                 currentItem = 0;
 696                                                 // Skip over spacers
 697                                                 while( ShowItemAt(0, 0, 0, currentItem) == -1 )
 698                                                         currentItem ++;
 699                                         }
 700                                         break;
 701                                 case 'A':
 702                                         currentItem --;
 703                                         // Skip over spacers
 704                                         while( ShowItemAt(0, 0, 0, currentItem) == -1 )
 705                                                 currentItem --;
 706
 707                                         if( currentItem < 0 ) {
 708                                                 currentItem = maxItemIndex - 1;
 709                                                 // Skip over spacers
 710                                                 while( ShowItemAt(0, 0, 0, currentItem) == -1 )
 711                                                         currentItem --;
 712                                         }
 713                                         break;
 714                                 }
 715                         }
 716                         else {
 717
 718                         }
 719
 720                         if( itemCount > maxItemIndex && currentItem < itemBase + 2 && itemBase > 0 )
 721                                 itemBase = currentItem - 2;
 722                         if( itemCount > maxItemIndex && currentItem > itemBase + itemCount - 2 && itemBase < maxItemIndex-1 )
 723                                 itemBase = currentItem - itemCount + 2;
 724                 }
 725                 else {
 726                         switch(ch)
 727                         {
 728                         case '\n':
 729                                 ret = ShowItemAt(0, 0, 0, currentItem);
 730                                 break;
 731                         case 'q':
 732                                 ret = -1;       // -1: Return with no dispense
 733                                 break;
 734                         }
 735
 736                         // Check if the return value was changed
 737                         if( ret != -2 ) break;
 738                 }
 739
 740         }
 741
 742
 743         // Leave
 744         endwin();
 745         return ret;
 746 }
 747
 748 /**
 749  * \brief Show item \a Index at (\a Col, \a Row)
 750  * \return Dispense index of item
 751  * \note Part of the NCurses UI
 752  */
 753 int ShowItemAt(int Row, int Col, int Width, int Index)
 754 {
 755          int    _x, _y, times;
 756         char    *name = NULL;
 757          int    price = 0;
 758
 759         switch(giUIMode)
 760         {
 761         // Standard UI
 762         // - This assumes that
 763         case UI_MODE_STANDARD:
 764                 // Bounds check
 765                 // Index = -1, request limit
 766                 if( Index < 0 || Index >= giNumItems+2 )
 767                         return giNumItems+2;
 768                 // Drink label
 769                 if( Index == 0 )
 770                 {
 771                         price = 0;
 772                         name = "Coke Machine";
 773                         Index = -1;     // -1 indicates a label
 774                         break;
 775                 }
 776                 Index --;
 777                 // Drinks 0 - 6
 778                 if( Index <= 6 )
 779                 {
 780                         name = gaItems[Index].Desc;
 781                         price = gaItems[Index].Price;
 782                         break;
 783                 }
 784                 Index -= 7;
 785                 // EPS label
 786                 if( Index == 0 )
 787                 {
 788                         price = 0;
 789                         name = "Electronic Payment System";
 790                         Index = -1;     // -1 indicates a label
 791                         break;
 792                 }
 793                 Index --;
 794                 Index += 7;
 795                 name = gaItems[Index].Desc;
 796                 price = gaItems[Index].Price;
 797                 break;
 798         default:
 799                 return -1;
 800         }
 801
 802         // Width = 0, don't print
 803         if( Width > 0 )
 804         {
 805                 move( Row, Col );
 806
 807                 if( Index >= 0 )
 808                 {
 809                         printw("%02i %s", Index, name);
 810
 811                         getyx(stdscr, _y, _x);
 812                         // Assumes max 4 digit prices
 813                         times = Width - 4 - (_x - Col); // TODO: Better handling for large prices
 814                         while(times--)  addch(' ');
 815                         printw("%4i", price);
 816                 }
 817                 else
 818                 {
 819                         printw("-- %s", name);
 820                         getyx(stdscr, _y, _x);
 821                         times = Width - 4 - (_x - Col); // TODO: Better handling for large prices
 822                         while(times--)  addch(' ');
 823                         printw("  --", price);
 824                 }
 825         }
 826
 827         return Index;
 828 }
 829
 830 /**
 831  * \brief Print a three-part string at the specified position (formatted)
 832  * \note NCurses UI Helper
 833  *
 834  * Prints \a Left on the left of the area, \a Right on the righthand side
 835  * and \a Mid in the middle of the area. These are padded with \a Pad1
 836  * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
 837  *
 838  * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
 839  * and the arguments to these are read in that order.
 840  */
 841 void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
 842         const char *Mid, char Pad2, const char *Right, ...)
 843 {
 844          int    lLen, mLen, rLen;
 845          int    times;
 846
 847         va_list args;
 848
 849         // Get the length of the strings
 850         va_start(args, Right);
 851         lLen = vsnprintf(NULL, 0, Left, args);
 852         mLen = vsnprintf(NULL, 0, Mid, args);
 853         rLen = vsnprintf(NULL, 0, Right, args);
 854         va_end(args);
 855
 856         // Sanity check
 857         if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
 858                 return ;        // TODO: What to do?
 859         }
 860
 861         move(Row, Col);
 862
 863         // Render strings
 864         va_start(args, Right);
 865         // - Left
 866         {
 867                 char    tmp[lLen+1];
 868                 vsnprintf(tmp, lLen+1, Left, args);
 869                 addstr(tmp);
 870         }
 871         // - Left padding
 872         times = (Width - mLen)/2 - lLen;
 873         while(times--)  addch(Pad1);
 874         // - Middle
 875         {
 876                 char    tmp[mLen+1];
 877                 vsnprintf(tmp, mLen+1, Mid, args);
 878                 addstr(tmp);
 879         }
 880         // - Right Padding
 881         times = (Width - mLen)/2 - rLen;
 882         if( (Width - mLen) % 2 )        times ++;
 883         while(times--)  addch(Pad2);
 884         // - Right
 885         {
 886                 char    tmp[rLen+1];
 887                 vsnprintf(tmp, rLen+1, Right, args);
 888                 addstr(tmp);
 889         }
 890 }
 891
 892 // ---------------------
 893 // --- Coke Protocol ---
 894 // ---------------------
 895 int OpenConnection(const char *Host, int Port)
 896 {
 897         struct hostent  *host;
 898         struct sockaddr_in      serverAddr;
 899          int    sock;
 900
 901         host = gethostbyname(Host);
 902         if( !host ) {
 903                 fprintf(stderr, "Unable to look up '%s'\n", Host);
 904                 return -1;
 905         }
 906
 907         memset(&serverAddr, 0, sizeof(serverAddr));
 908
 909         serverAddr.sin_family = AF_INET;        // IPv4
 910         // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
 911         serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
 912         serverAddr.sin_port = htons(Port);
 913
 914         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 915         if( sock < 0 ) {
 916                 fprintf(stderr, "Failed to create socket\n");
 917                 return -1;
 918         }
 919
 920         if( geteuid() == 0 )
 921         {
 922                  int    i;
 923                 struct sockaddr_in      localAddr;
 924                 memset(&localAddr, 0, sizeof(localAddr));
 925                 localAddr.sin_family = AF_INET; // IPv4
 926
 927                 // Loop through all the top ports until one is avaliable
 928                 for( i = 1001; i < 1024; i ++)
 929                 {
 930                         localAddr.sin_port = htons(i);  // IPv4
 931                         // Attempt to bind to low port for autoauth
 932                         if( bind(sock, (struct sockaddr*)&localAddr, sizeof(localAddr)) == 0 )
 933                                 break;
 934                 }
 935                 if( i == 1024 )
 936                         printf("Warning: AUTOAUTH unavaliable\n");
 937         }
 938
 939         if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
 940                 fprintf(stderr, "Failed to connect to server\n");
 941                 return -1;
 942         }
 943
 944         return sock;
 945 }
 946
 947 /**
 948  * \brief Authenticate with the server
 949  * \return Boolean Failure
 950  */
 951 int Authenticate(int Socket)
 952 {
 953         struct passwd   *pwd;
 954         char    *buf;
 955          int    responseCode;
 956         char    salt[32];
 957          int    i;
 958         regmatch_t      matches[4];
 959
 960         if( gbIsAuthenticated ) return 0;
 961
 962         // Get user name
 963         pwd = getpwuid( getuid() );
 964
 965         // Attempt automatic authentication
 966         sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
 967
 968         // Check if it worked
 969         buf = ReadLine(Socket);
 970
 971         responseCode = atoi(buf);
 972         switch( responseCode )
 973         {
 974         case 200:       // Autoauth succeeded, return
 975                 free(buf);
 976                 break;
 977
 978         case 401:       // Untrusted, attempt password authentication
 979                 free(buf);
 980
 981                 sendf(Socket, "USER %s\n", pwd->pw_name);
 982                 printf("Using username %s\n", pwd->pw_name);
 983
 984                 buf = ReadLine(Socket);
 985
 986                 // TODO: Get Salt
 987                 // Expected format: 100 SALT <something> ...
 988                 // OR             : 100 User Set
 989                 RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
 990                 responseCode = atoi(buf);
 991                 if( responseCode != 100 ) {
 992                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
 993                         free(buf);
 994                         return -1;      // ERROR
 995                 }
 996
 997                 // Check for salt
 998                 if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
 999                         // Store it for later
1000                         memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
1001                         salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
1002                 }
1003                 free(buf);
1004
1005                 // Give three attempts
1006                 for( i = 0; i < 3; i ++ )
1007                 {
1008                          int    ofs = strlen(pwd->pw_name)+strlen(salt);
1009                         char    tmpBuf[42];
1010                         char    tmp[ofs+20];
1011                         char    *pass = getpass("Password: ");
1012                         uint8_t h[20];
1013
1014                         // Create hash string
1015                         // <username><salt><hash>
1016                         strcpy(tmp, pwd->pw_name);
1017                         strcat(tmp, salt);
1018                         SHA1( (unsigned char*)pass, strlen(pass), h );
1019                         memcpy(tmp+ofs, h, 20);
1020
1021                         // Hash all that
1022                         SHA1( (unsigned char*)tmp, ofs+20, h );
1023                         sprintf(tmpBuf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1024                                 h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
1025                                 h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
1026                                 );
1027
1028                         // Send password
1029                         sendf(Socket, "PASS %s\n", tmpBuf);
1030                         buf = ReadLine(Socket);
1031
1032                         responseCode = atoi(buf);
1033                         // Auth OK?
1034                         if( responseCode == 200 )       break;
1035                         // Bad username/password
1036                         if( responseCode == 401 )       continue;
1037
1038                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1039                         free(buf);
1040                         return -1;
1041                 }
1042                 free(buf);
1043                 if( i == 3 )
1044                         return 2;       // 2 = Bad Password
1045                 break;
1046
1047         case 404:       // Bad Username
1048                 fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
1049                 free(buf);
1050                 return 1;
1051
1052         default:
1053                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1054                 printf("%s\n", buf);
1055                 free(buf);
1056                 return -1;
1057         }
1058
1059         // Set effective user
1060         if( gsEffectiveUser ) {
1061                 sendf(Socket, "SETEUSER %s\n", gsEffectiveUser);
1062
1063                 buf = ReadLine(Socket);
1064                 responseCode = atoi(buf);
1065
1066                 switch(responseCode)
1067                 {
1068                 case 200:
1069                         printf("Running as '%s' by '%s'\n", gsEffectiveUser, pwd->pw_name);
1070                         break;
1071
1072                 case 403:
1073                         printf("Only coke members can use `dispense -u`\n");
1074                         free(buf);
1075                         return -1;
1076
1077                 case 404:
1078                         printf("Invalid user selected\n");
1079                         free(buf);
1080                         return -1;
1081
1082                 default:
1083                         fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1084                         printf("%s\n", buf);
1085                         free(buf);
1086                         exit(-1);
1087                 }
1088
1089                 free(buf);
1090         }
1091
1092         gbIsAuthenticated = 1;
1093
1094         return 0;
1095 }
1096
1097 int GetUserBalance(int Socket)
1098 {
1099         regmatch_t      matches[6];
1100         struct passwd   *pwd;
1101         char    *buf;
1102          int    responseCode;
1103
1104         if( !gsUserName )
1105         {
1106                 if( gsEffectiveUser ) {
1107                         gsUserName = gsEffectiveUser;
1108                 }
1109                 else {
1110                         pwd = getpwuid( getuid() );
1111                         gsUserName = strdup(pwd->pw_name);
1112                 }
1113         }
1114
1115         sendf(Socket, "USER_INFO %s\n", gsUserName);
1116         buf = ReadLine(Socket);
1117         responseCode = atoi(buf);
1118         switch(responseCode)
1119         {
1120         case 202:       break;  // Ok
1121
1122         case 404:
1123                 printf("Invalid user? (USER_INFO failed)\n");
1124                 free(buf);
1125                 return -1;
1126
1127         default:
1128                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1129                 printf("%s\n", buf);
1130                 free(buf);
1131                 exit(-1);
1132         }
1133
1134         RunRegex(&gUserInfoRegex, buf, 6, matches, "Malformed server response");
1135
1136         giUserBalance = atoi( buf + matches[4].rm_so );
1137         gsUserFlags = strdup( buf + matches[5].rm_so );
1138
1139         free(buf);
1140
1141         return 0;
1142 }
1143
1144
1145 /**
1146  * \brief Fill the item information structure
1147  * \return Boolean Failure
1148  */
1149 void PopulateItemList(int Socket)
1150 {
1151         char    *buf;
1152          int    responseCode;
1153
1154         char    *itemType, *itemStart;
1155          int    count, i;
1156         regmatch_t      matches[4];
1157
1158         // Ask server for stock list
1159         send(Socket, "ENUM_ITEMS\n", 11, 0);
1160         buf = ReadLine(Socket);
1161
1162         //printf("Output: %s\n", buf);
1163
1164         responseCode = atoi(buf);
1165         if( responseCode != 201 ) {
1166                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1167                 exit(-1);
1168         }
1169
1170         // - Get item list -
1171
1172         // Expected format:
1173         //  201 Items <count>
1174         //  202 Item <count>
1175         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1176
1177         itemType = &buf[ matches[2].rm_so ];    buf[ matches[2].rm_eo ] = '\0';
1178         count = atoi( &buf[ matches[3].rm_so ] );
1179
1180         // Check array type
1181         if( strcmp(itemType, "Items") != 0 ) {
1182                 // What the?!
1183                 fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
1184                         itemType);
1185                 exit(-1);
1186         }
1187
1188         itemStart = &buf[ matches[3].rm_eo ];
1189
1190         free(buf);
1191
1192         giNumItems = count;
1193         gaItems = malloc( giNumItems * sizeof(tItem) );
1194
1195         // Fetch item information
1196         for( i = 0; i < giNumItems; i ++ )
1197         {
1198                 regmatch_t      matches[7];
1199
1200                 // Get item info
1201                 buf = ReadLine(Socket);
1202                 responseCode = atoi(buf);
1203
1204                 if( responseCode != 202 ) {
1205                         fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1206                         exit(-1);
1207                 }
1208
1209                 RunRegex(&gItemRegex, buf, 7, matches, "Malformed server response");
1210
1211                 buf[ matches[3].rm_eo ] = '\0';
1212
1213                 gaItems[i].Type = strdup( buf + matches[3].rm_so );
1214                 gaItems[i].ID = atoi( buf + matches[4].rm_so );
1215                 gaItems[i].Price = atoi( buf + matches[5].rm_so );
1216                 gaItems[i].Desc = strdup( buf + matches[6].rm_so );
1217
1218                 free(buf);
1219         }
1220
1221         // Read end of list
1222         buf = ReadLine(Socket);
1223         responseCode = atoi(buf);
1224
1225         if( responseCode != 200 ) {
1226                 fprintf(stderr, "Unknown response from dispense server %i\n'%s'",
1227                         responseCode, buf
1228                         );
1229                 exit(-1);
1230         }
1231
1232         free(buf);
1233 }
1234
1235
1236 /**
1237  * \brief Get information on an item
1238  * \return Boolean Failure
1239  */
1240 int Dispense_ItemInfo(int Socket, const char *Type, int ID)
1241 {
1242          int    responseCode;
1243         char    *buf;
1244         regmatch_t matches[7];
1245         char    *type, *desc;
1246          int    id, price;
1247
1248         // Dispense!
1249         sendf(Socket, "ITEM_INFO %s:%i\n", Type, ID);
1250         buf = ReadLine(Socket);
1251
1252         responseCode = atoi(buf);
1253         switch( responseCode )
1254         {
1255         case 202:
1256                 break;
1257
1258         case 406:
1259                 printf("Bad item name\n");
1260                 free(buf);
1261                 return 1;
1262
1263         default:
1264                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1265                 free(buf);
1266                 return -1;
1267         }
1268
1269
1270         RunRegex(&gItemRegex, buf, 7, matches, "Malformed server response");
1271
1272         buf[ matches[3].rm_eo ] = '\0';
1273
1274         type = buf + matches[3].rm_so;  buf[matches[3].rm_eo] = '\0';
1275         id = atoi( buf + matches[4].rm_so );
1276         price = atoi( buf + matches[5].rm_so );
1277         desc = buf + matches[6].rm_so;  buf[matches[6].rm_eo] = '\0';
1278
1279         printf("%8s:%-2i %2i.%02i %s\n", type, id, price/100, price%100, desc);
1280
1281         free(buf);
1282
1283         return 0;
1284 }
1285
1286 /**
1287  * \brief Dispense an item
1288  * \return Boolean Failure
1289  */
1290 int DispenseItem(int Socket, const char *Type, int ID)
1291 {
1292          int    ret, responseCode;
1293         char    *buf;
1294
1295         // Check for a dry run
1296         if( gbDryRun ) {
1297                 printf("Dry Run - No action\n");
1298                 return 0;
1299         }
1300
1301         // Dispense!
1302         sendf(Socket, "DISPENSE %s:%i\n", Type, ID);
1303         buf = ReadLine(Socket);
1304
1305         responseCode = atoi(buf);
1306         switch( responseCode )
1307         {
1308         case 200:
1309                 printf("Dispense OK\n");
1310                 ret = 0;
1311                 break;
1312         case 401:
1313                 printf("Not authenticated\n");
1314                 ret = 1;
1315                 break;
1316         case 402:
1317                 printf("Insufficient balance\n");
1318                 ret = 1;
1319                 break;
1320         case 406:
1321                 printf("Bad item name\n");
1322                 ret = 1;
1323                 break;
1324         case 500:
1325                 printf("Item failed to dispense, is the slot empty?\n");
1326                 ret = 1;
1327                 break;
1328         case 501:
1329                 printf("Dispense not possible (slot empty/permissions)\n");
1330                 ret = 1;
1331                 break;
1332         default:
1333                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1334                 ret = -2;
1335                 break;
1336         }
1337
1338         free(buf);
1339         return ret;
1340 }
1341
1342 /**
1343  * \brief Alter a user's balance
1344  */
1345 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
1346 {
1347         char    *buf;
1348          int    responseCode;
1349
1350         // Check for a dry run
1351         if( gbDryRun ) {
1352                 printf("Dry Run - No action\n");
1353                 return 0;
1354         }
1355
1356         sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
1357         buf = ReadLine(Socket);
1358
1359         responseCode = atoi(buf);
1360         free(buf);
1361
1362         switch(responseCode)
1363         {
1364         case 200:       return 0;       // OK
1365         case 402:
1366                 fprintf(stderr, "Insufficient balance\n");
1367                 return 1;
1368         case 403:       // Not in coke
1369                 fprintf(stderr, "You are not in coke (sucker)\n");
1370                 return 1;
1371         case 404:       // Unknown user
1372                 fprintf(stderr, "Unknown user '%s'\n", Username);
1373                 return 2;
1374         default:
1375                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1376                 return -1;
1377         }
1378
1379         return -1;
1380 }
1381
1382 /**
1383  * \brief Set a user's balance
1384  * \note Only avaliable to dispense admins
1385  */
1386 int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
1387 {
1388         char    *buf;
1389          int    responseCode;
1390
1391         // Check for a dry run
1392         if( gbDryRun ) {
1393                 printf("Dry Run - No action\n");
1394                 return 0;
1395         }
1396
1397         sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
1398         buf = ReadLine(Socket);
1399
1400         responseCode = atoi(buf);
1401         free(buf);
1402
1403         switch(responseCode)
1404         {
1405         case 200:       return 0;       // OK
1406         case 403:       // Not in coke
1407                 fprintf(stderr, "You are not an admin\n");
1408                 return 1;
1409         case 404:       // Unknown user
1410                 fprintf(stderr, "Unknown user '%s'\n", Username);
1411                 return 2;
1412         default:
1413                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1414                 return -1;
1415         }
1416
1417         return -1;
1418 }
1419
1420 /**
1421  * \brief Give money to another user
1422  */
1423 int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
1424 {
1425         char    *buf;
1426          int    responseCode;
1427
1428         if( Ammount < 0 ) {
1429                 printf("Sorry, you can only give, you can't take.\n");
1430                 return -1;
1431         }
1432
1433         // Fast return on zero
1434         if( Ammount == 0 ) {
1435                 printf("Are you actually going to give any?\n");
1436                 return 0;
1437         }
1438
1439         // Check for a dry run
1440         if( gbDryRun ) {
1441                 printf("Dry Run - No action\n");
1442                 return 0;
1443         }
1444
1445         sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
1446         buf = ReadLine(Socket);
1447
1448         responseCode = atoi(buf);
1449         free(buf);
1450
1451         switch(responseCode)
1452         {
1453         case 200:       return 0;       // OK
1454
1455         case 402:
1456                 fprintf(stderr, "Insufficient balance\n");
1457                 return 1;
1458
1459         case 404:       // Unknown user
1460                 fprintf(stderr, "Unknown user '%s'\n", Username);
1461                 return 2;
1462
1463         default:
1464                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1465                 return -1;
1466         }
1467
1468         return -1;
1469 }
1470
1471
1472 /**
1473  * \brief Donate money to the club
1474  */
1475 int Dispense_Donate(int Socket, int Ammount, const char *Reason)
1476 {
1477         char    *buf;
1478          int    responseCode;
1479
1480         if( Ammount < 0 ) {
1481                 printf("Sorry, you can only give, you can't take.\n");
1482                 return -1;
1483         }
1484
1485         // Fast return on zero
1486         if( Ammount == 0 ) {
1487                 printf("Are you actually going to give any?\n");
1488                 return 0;
1489         }
1490
1491         // Check for a dry run
1492         if( gbDryRun ) {
1493                 printf("Dry Run - No action\n");
1494                 return 0;
1495         }
1496
1497         sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
1498         buf = ReadLine(Socket);
1499
1500         responseCode = atoi(buf);
1501         free(buf);
1502
1503         switch(responseCode)
1504         {
1505         case 200:       return 0;       // OK
1506
1507         case 402:
1508                 fprintf(stderr, "Insufficient balance\n");
1509                 return 1;
1510
1511         default:
1512                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1513                 return -1;
1514         }
1515
1516         return -1;
1517 }
1518
1519 /**
1520  * \brief Enumerate users
1521  */
1522 int Dispense_EnumUsers(int Socket)
1523 {
1524         char    *buf;
1525          int    responseCode;
1526          int    nUsers;
1527         regmatch_t      matches[4];
1528
1529         if( giMinimumBalance != INT_MIN ) {
1530                 if( giMaximumBalance != INT_MAX ) {
1531                         sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
1532                 }
1533                 else {
1534                         sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
1535                 }
1536         }
1537         else {
1538                 if( giMaximumBalance != INT_MAX ) {
1539                         sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
1540                 }
1541                 else {
1542                         sendf(Socket, "ENUM_USERS\n");
1543                 }
1544         }
1545         buf = ReadLine(Socket);
1546         responseCode = atoi(buf);
1547
1548         switch(responseCode)
1549         {
1550         case 201:       break;  // Ok, length follows
1551
1552         default:
1553                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1554                 free(buf);
1555                 return -1;
1556         }
1557
1558         // Get count (not actually used)
1559         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1560         nUsers = atoi( buf + matches[3].rm_so );
1561         printf("%i users returned\n", nUsers);
1562
1563         // Free string
1564         free(buf);
1565
1566         // Read returned users
1567         do {
1568                 buf = ReadLine(Socket);
1569                 responseCode = atoi(buf);
1570
1571                 if( responseCode != 202 )       break;
1572
1573                 _PrintUserLine(buf);
1574                 free(buf);
1575         } while(responseCode == 202);
1576
1577         // Check final response
1578         if( responseCode != 200 ) {
1579                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1580                 free(buf);
1581                 return -1;
1582         }
1583
1584         free(buf);
1585
1586         return 0;
1587 }
1588
1589 int Dispense_ShowUser(int Socket, const char *Username)
1590 {
1591         char    *buf;
1592          int    responseCode, ret;
1593
1594         sendf(Socket, "USER_INFO %s\n", Username);
1595         buf = ReadLine(Socket);
1596
1597         responseCode = atoi(buf);
1598
1599         switch(responseCode)
1600         {
1601         case 202:
1602                 _PrintUserLine(buf);
1603                 ret = 0;
1604                 break;
1605
1606         case 404:
1607                 printf("Unknown user '%s'\n", Username);
1608                 ret = 1;
1609                 break;
1610
1611         default:
1612                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1613                 ret = -1;
1614                 break;
1615         }
1616
1617         free(buf);
1618
1619         return ret;
1620 }
1621
1622 void _PrintUserLine(const char *Line)
1623 {
1624         regmatch_t      matches[6];
1625          int    bal;
1626
1627         RunRegex(&gUserInfoRegex, Line, 6, matches, "Malformed server response");
1628         // 3: Username
1629         // 4: Balance
1630         // 5: Flags
1631         {
1632                  int    usernameLen = matches[3].rm_eo - matches[3].rm_so;
1633                 char    username[usernameLen + 1];
1634                  int    flagsLen = matches[5].rm_eo - matches[5].rm_so;
1635                 char    flags[flagsLen + 1];
1636
1637                 memcpy(username, Line + matches[3].rm_so, usernameLen);
1638                 username[usernameLen] = '\0';
1639                 memcpy(flags, Line + matches[5].rm_so, flagsLen);
1640                 flags[flagsLen] = '\0';
1641
1642                 bal = atoi(Line + matches[4].rm_so);
1643                 printf("%-15s: $%4i.%02i (%s)\n", username, bal/100, abs(bal)%100, flags);
1644         }
1645 }
1646
1647 int Dispense_AddUser(int Socket, const char *Username)
1648 {
1649         char    *buf;
1650          int    responseCode, ret;
1651
1652         // Check for a dry run
1653         if( gbDryRun ) {
1654                 printf("Dry Run - No action\n");
1655                 return 0;
1656         }
1657
1658         sendf(Socket, "USER_ADD %s\n", Username);
1659
1660         buf = ReadLine(Socket);
1661         responseCode = atoi(buf);
1662
1663         switch(responseCode)
1664         {
1665         case 200:
1666                 printf("User '%s' added\n", Username);
1667                 ret = 0;
1668                 break;
1669
1670         case 403:
1671                 printf("Only wheel can add users\n");
1672                 ret = 1;
1673                 break;
1674
1675         case 404:
1676                 printf("User '%s' already exists\n", Username);
1677                 ret = 0;
1678                 break;
1679
1680         default:
1681                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1682                 ret = -1;
1683                 break;
1684         }
1685
1686         free(buf);
1687
1688         return ret;
1689 }
1690
1691 int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString)
1692 {
1693         char    *buf;
1694          int    responseCode, ret;
1695
1696         // Check for a dry run
1697         if( gbDryRun ) {
1698                 printf("Dry Run - No action\n");
1699                 return 0;
1700         }
1701
1702         // TODO: Pre-validate the string
1703
1704         sendf(Socket, "USER_FLAGS %s %s\n", Username, TypeString);
1705
1706         buf = ReadLine(Socket);
1707         responseCode = atoi(buf);
1708
1709         switch(responseCode)
1710         {
1711         case 200:
1712                 printf("User '%s' updated\n", Username);
1713                 ret = 0;
1714                 break;
1715
1716         case 403:
1717                 printf("Only wheel can modify users\n");
1718                 ret = 1;
1719                 break;
1720
1721         case 404:
1722                 printf("User '%s' does not exist\n", Username);
1723                 ret = 0;
1724                 break;
1725
1726         case 407:
1727                 printf("Flag string is invalid\n");
1728                 ret = 0;
1729                 break;
1730
1731         default:
1732                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1733                 ret = -1;
1734                 break;
1735         }
1736
1737         free(buf);
1738
1739         return ret;
1740 }
1741
1742 // ---------------
1743 // --- Helpers ---
1744 // ---------------
1745 char *ReadLine(int Socket)
1746 {
1747         static char     buf[BUFSIZ];
1748         static int      bufPos = 0;
1749         static int      bufValid = 0;
1750          int    len;
1751         char    *newline = NULL;
1752          int    retLen = 0;
1753         char    *ret = malloc(10);
1754
1755         #if DEBUG_TRACE_SERVER
1756         printf("ReadLine: ");
1757         #endif
1758         fflush(stdout);
1759
1760         ret[0] = '\0';
1761
1762         while( !newline )
1763         {
1764                 if( bufValid ) {
1765                         len = bufValid;
1766                 }
1767                 else {
1768                         len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
1769                         buf[bufPos+len] = '\0';
1770                 }
1771
1772                 newline = strchr( buf+bufPos, '\n' );
1773                 if( newline ) {
1774                         *newline = '\0';
1775                 }
1776
1777                 retLen += strlen(buf+bufPos);
1778                 ret = realloc(ret, retLen + 1);
1779                 strcat( ret, buf+bufPos );
1780
1781                 if( newline ) {
1782                          int    newLen = newline - (buf+bufPos) + 1;
1783                         bufValid = len - newLen;
1784                         bufPos += newLen;
1785                 }
1786                 if( len + bufPos == BUFSIZ - 1 )        bufPos = 0;
1787         }
1788
1789         #if DEBUG_TRACE_SERVER
1790         printf("%i '%s'\n", retLen, ret);
1791         #endif
1792
1793         return ret;
1794 }
1795
1796 int sendf(int Socket, const char *Format, ...)
1797 {
1798         va_list args;
1799          int    len;
1800
1801         va_start(args, Format);
1802         len = vsnprintf(NULL, 0, Format, args);
1803         va_end(args);
1804
1805         {
1806                 char    buf[len+1];
1807                 va_start(args, Format);
1808                 vsnprintf(buf, len+1, Format, args);
1809                 va_end(args);
1810
1811                 #if DEBUG_TRACE_SERVER
1812                 printf("sendf: %s", buf);
1813                 #endif
1814
1815                 return send(Socket, buf, len, 0);
1816         }
1817 }
1818
1819 char *trim(char *string)
1820 {
1821          int    i;
1822
1823         while( isspace(*string) )
1824                 string ++;
1825
1826         for( i = strlen(string); i--; )
1827         {
1828                 if( isspace(string[i]) )
1829                         string[i] = '\0';
1830                 else
1831                         break;
1832         }
1833
1834         return string;
1835 }
1836
1837 int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
1838 {
1839          int    ret;
1840
1841         ret = regexec(regex, string, nMatches, matches, 0);
1842         if( ret && errorMessage ) {
1843                 size_t  len = regerror(ret, regex, NULL, 0);
1844                 char    errorStr[len];
1845                 regerror(ret, regex, errorStr, len);
1846                 printf("string = '%s'\n", string);
1847                 fprintf(stderr, "%s\n%s", errorMessage, errorStr);
1848                 exit(-1);
1849         }
1850
1851         return ret;
1852 }
1853
1854 void CompileRegex(regex_t *regex, const char *pattern, int flags)
1855 {
1856          int    ret = regcomp(regex, pattern, flags);
1857         if( ret ) {
1858                 size_t  len = regerror(ret, regex, NULL, 0);
1859                 char    errorStr[len];
1860                 regerror(ret, regex, errorStr, len);
1861                 fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
1862                 exit(-1);
1863         }
1864 }