Added merlo to trusted list and changed default server to merlo
[tpg/opendispense2.git] / src / client / main.c
index 17971dc..b16c495 100644 (file)
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
-#include <openssl/sha.h>       // SHA1
+//#include <openssl/sha.h>     // SHA1
 
 #define        USE_NCURSES_INTERFACE   0
 #define DEBUG_TRACE_SERVER     0
+#define USE_AUTOAUTH   1
+
+#define MAX_TXT_ARGS   5       // Maximum number of textual arguments (including command)
+#define DISPENSE_MULTIPLE_MAX  20      // Maximum argument to -c
+
+enum eUI_Modes
+{
+       UI_MODE_BASIC,  // Non-NCurses
+       UI_MODE_STANDARD,
+       UI_MODE_DRINKSONLY,
+       UI_MODE_ALL,
+       NUM_UI_MODES
+};
+
+enum eReturnValues
+{
+       RV_SUCCESS,
+       RV_BAD_ITEM,
+       RV_INVALID_USER,
+       RV_PERMISSIONS,
+       RV_ARGUMENTS,
+       RV_BALANCE,
+       RV_SERVER_ERROR,        // Generic for 5xx codes
+       RV_UNKNOWN_ERROR = -1,
+       RV_SOCKET_ERROR = -2,
+       RV_UNKNOWN_RESPONSE = -3,
+};
 
 // === TYPES ===
 typedef struct sItem {
-       char    *Ident;
+       char    *Type;
+        int    ID;
+        int    Status; // 0: Availiable, 1: Sold out, -1: Error
        char    *Desc;
         int    Price;
 }      tItem;
 
 // === PROTOTYPES ===
- int   main(int argc, char *argv[]);
 void   ShowUsage(void);
+ int   main(int argc, char *argv[]);
 // --- GUI ---
  int   ShowNCursesUI(void);
-void   ShowItemAt(int Row, int Col, int Width, int Index);
+ int   ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted);
 void   PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1, const char *Mid, char Pad2, const char *Right, ...);
 // --- Coke Server Communication ---
  int   OpenConnection(const char *Host, int Port);
  int   Authenticate(int Socket);
+ int   GetUserBalance(int Socket);
 void   PopulateItemList(int Socket);
- int   DispenseItem(int Socket, int ItemID);
+ int   Dispense_ItemInfo(int Socket, const char *Type, int ID);
+ int   DispenseItem(int Socket, const char *Type, int ID);
  int   Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason);
- int   Dispense_SetBalance(int Socket, const char *Username, int Ammount, const char *Reason);
+ int   Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason);
+ int   Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason);
+ int   Dispense_Refund(int Socket, const char *Username, const char *Item, int PriceOverride);
+ int   Dispense_Donate(int Socket, int Ammount, const char *Reason);
  int   Dispense_EnumUsers(int Socket);
  int   Dispense_ShowUser(int Socket, const char *Username);
 void   _PrintUserLine(const char *Line);
  int   Dispense_AddUser(int Socket, const char *Username);
- int   Dispense_SetUserType(int Socket, const char *Username, const char *TypeString);
+ int   Dispense_SetUserType(int Socket, const char *Username, const char *TypeString, const char *Reason);
+ int   Dispense_SetItem(int Socket, const char *Type, int ID, int NewPrice, const char *NewName);
 // --- Helpers ---
 char   *ReadLine(int Socket);
  int   sendf(int Socket, const char *Format, ...);
@@ -62,36 +97,130 @@ char       *trim(char *string);
 void   CompileRegex(regex_t *regex, const char *pattern, int flags);
 
 // === GLOBALS ===
-char   *gsDispenseServer = "localhost";
+char   *gsDispenseServer = "merlo.ucc.gu.uwa.edu.au";
  int   giDispensePort = 11020;
 
 tItem  *gaItems;
  int   giNumItems;
-regex_t        gArrayRegex, gItemRegex, gSaltRegex, gUserInfoRegex;
+regex_t        gArrayRegex, gItemRegex, gSaltRegex, gUserInfoRegex, gUserItemIdentRegex;
  int   gbIsAuthenticated = 0;
 
 char   *gsItemPattern; //!< Item pattern
 char   *gsEffectiveUser;       //!< '-u' Dispense as another user
- int   gbUseNCurses = 0;       //!< '-G' Use the NCurses GUI?
+ int   giUIMode = UI_MODE_STANDARD;
+ int   gbDryRun = 0;   //!< '-n' Read-only
  int   giMinimumBalance = INT_MIN;     //!< '-m' Minumum balance for `dispense acct`
  int   giMaximumBalance = INT_MAX;     //!< '-M' Maximum balance for `dispense acct`
+char   *gsUserName;    //!< User that dispense will happen as
+char   *gsUserFlags;   //!< User's flag set
+ int   giUserBalance=-1;       //!< User balance (set by Authenticate)
+ int   giDispenseCount = 1;    //!< Number of dispenses to do
+char   *gsTextArgs[MAX_TXT_ARGS];
+ int   giTextArgc;
 
 // === CODE ===
+void ShowUsage(void)
+{
+       printf( "Usage:\n" );
+       if( giTextArgc == 0 )
+               printf(
+                       "  == Everyone ==\n"
+                       "    dispense\n"
+                       "        Show interactive list\n"
+                       "    dispense <name>|<index>|<itemid>\n"
+                       "        Dispense named item (<name> matches if it is a unique prefix)\n"
+                       );
+       if( giTextArgc == 0 || strcmp(gsTextArgs[0], "give") == 0 )
+               printf(
+                       "    dispense give <user> <ammount> \"<reason>\"\n"
+                       "        Give money to another user\n"
+                       );
+       
+       if( giTextArgc == 0 || strcmp(gsTextArgs[0], "donate") == 0 )
+               printf(
+                       "    dispense donate <ammount> \"<reason>\"\n"
+                       "        Donate to the club\n"
+                       );
+       if( giTextArgc == 0 || strcmp(gsTextArgs[0], "iteminfo") == 0 )
+               printf(
+                       "    dispense iteminfo <itemid>\n"
+                       "        Get the name and price for an item\n"
+                       );
+       if( giTextArgc == 0 )
+               printf("  == Coke members == \n");
+       if( giTextArgc == 0 || strcmp(gsTextArgs[0], "acct") == 0 )
+               printf(
+                       "    dispense acct [<user>]\n"
+                       "        Show user balances\n"
+                       "    dispense acct <user> [+-]<ammount> \"<reason>\"\n"
+                       "        Alter a account value\n"
+                       "    dispense acct <user> =<ammount> \"<reason>\"\n"
+                       "        Set an account balance\n"
+                       );
+       if( giTextArgc == 0 || strcmp(gsTextArgs[0], "refund") == 0 )
+               printf(
+                       "    dispense refund <user> <itemid> [<price>]\n"
+                       "        Refund an item to a user (with optional price override)\n"
+                       );
+       if( giTextArgc == 0 || strcmp(gsTextArgs[0], "slot") == 0 )
+               printf(
+                       "    dispense slot <itemid> <price> <name>\n"
+                       "        Rename/Re-price a slot\n"
+                       );
+       if( giTextArgc == 0 )
+               printf("  == Dispense administrators ==\n");
+       if( giTextArgc == 0 || strcmp(gsTextArgs[0], "user") == 0 )
+               printf(
+                       "    dispense user add <user>\n"
+                       "        Create new account\n"
+                       "    dispense user type <user> <flags> <reason>\n"
+                       "        Alter a user's flags\n"
+                       "        <flags> is a comma-separated list of user, coke, admin, internal or disabled\n"
+                       "        Flags are removed by preceding the name with '-' or '!'\n"
+                       );
+       if( giTextArgc == 0 )
+               printf( "\n"
+                       "General Options:\n"
+                       "    -c <count>\n"
+                       "        Dispense multiple times\n"
+                       "    -u <username>\n"
+                       "        Set a different user (Coke members only)\n"
+                       "    -h / -?\n"
+                       "        Show help text\n"
+                       "    -G\n"
+                       "        Use simple textual interface (instead of ncurses)\n"
+                       "    -n\n"
+                       "        Dry run - Do not actually do dispenses\n"
+                       "    -m <min balance>\n"
+                       "    -M <max balance>\n"
+                       "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
+                       "Definitions:\n"
+                       "    <itemid>\n"
+                       "        Item ID of the form <type>:<num> where <type> is a non-empty string of alpha-numeric characters, and <num> is a non-negative integer\n"
+//                     "    <user>\n"
+//                     "        Account name\n"
+                       );
+}
+
 int main(int argc, char *argv[])
 {
         int    sock;
-        int    i;
+        int    i, ret = 0;
        char    buffer[BUFSIZ];
        
+       gsTextArgs[0] = "";
+
        // -- Create regular expressions
        // > Code Type Count ...
        CompileRegex(&gArrayRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([0-9]+)", REG_EXTENDED);     //
-       // > Code Type Ident Price Desc
-       CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z0-9:]+?)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
+       // > Code Type Ident Status Price Desc
+       CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z]+):([0-9]+)\\s+(avail|sold|error)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
        // > Code 'SALT' salt
        CompileRegex(&gSaltRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+(.+)$", REG_EXTENDED);
        // > Code 'User' Username Balance Flags
        CompileRegex(&gUserInfoRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([^ ]+)\\s+(-?[0-9]+)\\s+(.+)$", REG_EXTENDED);
+       // > Item Ident
+       CompileRegex(&gUserItemIdentRegex, "^([A-Za-z]+):([0-9]+)$", REG_EXTENDED);
 
        // Parse Arguments
        for( i = 1; i < argc; i ++ )
@@ -106,156 +235,536 @@ int main(int argc, char *argv[])
                        case '?':
                                ShowUsage();
                                return 0;
-                       
+                                       
+                       case 'c':
+                               if( i + 1 >= argc ) {
+                                       fprintf(stderr, "%s: -c takes an argument\n", argv[0]);
+                                       ShowUsage();
+                                       return -1;
+                               }
+                               giDispenseCount = atoi(argv[++i]);
+                               if( giDispenseCount < 1 || giDispenseCount > DISPENSE_MULTIPLE_MAX ) {
+                                       fprintf(stderr, "Sorry, only 1-20 can be passed to -c (safety)\n");
+                                       return -1;
+                               }
+                               
+                               break ;
+       
                        case 'm':       // Minimum balance
+                               if( i + 1 >= argc ) {
+                                       fprintf(stderr, "%s: -m takes an argument\n", argv[0]);
+                                       ShowUsage();
+                                       return RV_ARGUMENTS;
+                               }
                                giMinimumBalance = atoi(argv[++i]);
                                break;
                        case 'M':       // Maximum balance
+                               if( i + 1 >= argc ) {
+                                       fprintf(stderr, "%s: -M takes an argument\n", argv[0]);
+                                       ShowUsage();
+                                       return RV_ARGUMENTS;
+                               }
                                giMaximumBalance = atoi(argv[++i]);
                                break;
                        
                        case 'u':       // Override User
+                               if( i + 1 >= argc ) {
+                                       fprintf(stderr, "%s: -u takes an argument\n", argv[0]);
+                                       ShowUsage();
+                                       return RV_ARGUMENTS;
+                               }
                                gsEffectiveUser = argv[++i];
                                break;
                        
-                       case 'G':       // Use GUI
-                               gbUseNCurses = 1;
+                       case 'H':       // Override remote host
+                               if( i + 1 >= argc ) {
+                                       fprintf(stderr, "%s: -H takes an argument\n", argv[0]);
+                                       ShowUsage();
+                                       return RV_ARGUMENTS;
+                               }
+                               gsDispenseServer = argv[++i];
+                               break;
+                       case 'P':       // Override remote port
+                               if( i + 1 >= argc ) {
+                                       fprintf(stderr, "%s: -P takes an argument\n", argv[0]);
+                                       ShowUsage();
+                                       return RV_ARGUMENTS;
+                               }
+                               giDispensePort = atoi(argv[++i]);
+                               break;
+                       
+                       // Set slot name/price
+                       case 's':
+                               if( giTextArgc != 0 ) {
+                                       fprintf(stderr, "%s: -s must appear before other arguments\n", argv[0]);
+                                       ShowUsage();
+                                       return RV_ARGUMENTS;
+                               }
+                               gsTextArgs[0] = "slot"; // HACK!!
+                               giTextArgc ++;
+                               break;
+                       
+                       case 'G':       // Don't use GUI
+                               giUIMode = UI_MODE_BASIC;
+                               break;
+                       case 'D':       // Drinks only
+                               giUIMode = UI_MODE_DRINKSONLY;
+                               break;
+                       case 'n':       // Dry Run / read-only
+                               gbDryRun = 1;
+                               break;
+                       case '-':
+                               if( strcmp(argv[i], "--help") == 0 ) {
+                                       ShowUsage();
+                                       return 0;
+                               }
+                               else {
+                                       fprintf(stderr, "%s: Unknown switch '%s'\n", argv[0], argv[i]);
+                                       ShowUsage();
+                                       return RV_ARGUMENTS;
+                               }
+                               break;
+                       default:
+                               // The first argument is not allowed to begin with 'i'
+                               // (catches most bad flags)
+                               if( giTextArgc == 0 ) {
+                                       fprintf(stderr, "%s: Unknown switch '%s'\n", argv[0], argv[i]);
+                                       ShowUsage();
+                                       return RV_ARGUMENTS;
+                               }
+                               if( giTextArgc == MAX_TXT_ARGS )
+                               {
+                                       fprintf(stderr, "ERROR: Too many arguments\n");
+                                       return RV_ARGUMENTS;
+                               }
+                               gsTextArgs[giTextArgc++] = argv[i];
                                break;
                        }
 
                        continue;
                }
-               
-               if( strcmp(arg, "acct") == 0 )
+
+               if( giTextArgc == MAX_TXT_ARGS )
                {
-                       // Connect to server
-                       sock = OpenConnection(gsDispenseServer, giDispensePort);
-                       if( sock < 0 )  return -1;
+                       fprintf(stderr, "ERROR: Too many arguments\n");
+                       return RV_ARGUMENTS;
+               }
+       
+               gsTextArgs[giTextArgc++] = argv[i];
+       
+       }
 
-                       // List accounts?
-                       if( i + 1 == argc ) {
-                               Dispense_EnumUsers(sock);
-                               return 0;
+       //
+       // `dispense acct`
+       // - 
+       if( strcmp(gsTextArgs[0], "acct") == 0 )
+       {
+               // Connect to server
+               sock = OpenConnection(gsDispenseServer, giDispensePort);
+               if( sock < 0 )  return RV_SOCKET_ERROR;
+               // List accounts?
+               if( giTextArgc == 1 ) {
+                       ret = Dispense_EnumUsers(sock);
+                       close(sock);
+                       return ret;
+               }
+                       
+               // gsTextArgs[1]: Username
+               
+               // Alter account?
+               if( giTextArgc != 2 )
+               {
+                       if( giTextArgc != 4 ) {
+                               fprintf(stderr, "`dispense acct` requires a reason\n");
+                               ShowUsage();
+                               return RV_ARGUMENTS;
                        }
                        
-                       // argv[i+1]: Username
+                       // Authentication required
+                       ret = Authenticate(sock);
+                       if(ret) return ret;
                        
-                       // Alter account?
-                       if( i + 2 < argc )
-                       {
-                               if( i + 3 >= argc ) {
-                                       fprintf(stderr, "Error: `dispense acct' needs a reason\n");
+                       // gsTextArgs[1]: Username
+                       // gsTextArgs[2]: Ammount
+                       // gsTextArgs[3]: Reason
+                       
+                       if( gsTextArgs[2][0] == '=' ) {
+                               // Set balance
+                               if( gsTextArgs[2][1] != '0' && atoi(gsTextArgs[2]+1) == 0 ) {
+                                       fprintf(stderr, "Error: Invalid balance to be set\n");
                                        exit(1);
                                }
                                
-                               // Authentication required
-                               if( Authenticate(sock) )
-                                       return -1;
-                               
-                               // argv[i+1]: Username
-                               // argv[i+2]: Ammount
-                               // argv[i+3]: Reason
-                               
-                               if( argv[i+2][0] == '=' ) {
-                                       // Set balance
-                                       Dispense_SetBalance(sock, argv[i+1], atoi(argv[i+2] + 1), argv[i+3]);
-                               }
-                               else {
-                                       // Alter balance
-                                       Dispense_AlterBalance(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
-                               }
+                               ret = Dispense_SetBalance(sock, gsTextArgs[1], atoi(gsTextArgs[2]+1), gsTextArgs[3]);
                        }
-                       
-                       // Show user information
-                       Dispense_ShowUser(sock, argv[i+1]);
-                       
+                       else {
+                               // Alter balance
+                               ret = Dispense_AlterBalance(sock, gsTextArgs[1], atoi(gsTextArgs[2]), gsTextArgs[3]);
+                       }
+               }
+               // On error, quit
+               if( ret ) {
                        close(sock);
-                       return 0;
+                       return ret;
                }
-               else if( strcmp(arg, "give") == 0 )
-               {
-                       // TODO: `dispense give`
-                       printf("TODO: Implement `dispense give`\n");
-                       return 0;
+               
+               // Show user information
+               ret = Dispense_ShowUser(sock, gsTextArgs[1]);
+               
+               close(sock);
+               return ret;
+       }
+       //
+       // `dispense give`
+       // - "Here, have some money."
+       else if( strcmp(gsTextArgs[0], "give") == 0 )
+       {
+               if( giTextArgc != 4 ) {
+                       fprintf(stderr, "`dispense give` takes three arguments\n");
+                       ShowUsage();
+                       return RV_ARGUMENTS;
+               }
+               
+               // gsTextArgs[1]: Destination
+               // gsTextArgs[2]: Ammount
+               // gsTextArgs[3]: Reason
+               
+               // Connect to server
+               sock = OpenConnection(gsDispenseServer, giDispensePort);
+               if( sock < 0 )  return RV_SOCKET_ERROR;
+               
+               // Authenticate
+               ret = Authenticate(sock);
+               if(ret) return ret;
+               
+               ret = Dispense_Give(sock, gsTextArgs[1], atoi(gsTextArgs[2]), gsTextArgs[3]);
+
+               close(sock);
+       
+               return ret;
+       }
+       // 
+       // `dispense user`
+       // - User administration (Admin Only)
+       if( strcmp(gsTextArgs[0], "user") == 0 )
+       {
+               // Check argument count
+               if( giTextArgc == 1 ) {
+                       fprintf(stderr, "Error: `dispense user` requires arguments\n");
+                       ShowUsage();
+                       return RV_ARGUMENTS;
                }
-               else if( strcmp(arg, "user") == 0 )
+               
+               // Connect to server
+               sock = OpenConnection(gsDispenseServer, giDispensePort);
+               if( sock < 0 )  return RV_SOCKET_ERROR;
+               
+               // Attempt authentication
+               ret = Authenticate(sock);
+               if(ret) return ret;
+               
+               // Add new user?
+               if( strcmp(gsTextArgs[1], "add") == 0 )
                {
-                       // Check argument count
-                       if( i + 1 >= argc ) {
-                               fprintf(stderr, "Error: `dispense user` requires arguments\n");
+                       if( giTextArgc != 3 ) {
+                               fprintf(stderr, "Error: `dispense user add` requires an argument\n");
                                ShowUsage();
-                               exit(1);
+                               return RV_ARGUMENTS;
                        }
                        
-                       // Connect to server
-                       sock = OpenConnection(gsDispenseServer, giDispensePort);
-                       if( sock < 0 )  return -1;
-                       
-                       // Attempt authentication
-                       if( Authenticate(sock) )
-                               return -1;
+                       ret = Dispense_AddUser(sock, gsTextArgs[2]);
+               }
+               // Update a user
+               else if( strcmp(gsTextArgs[1], "type") == 0 || strcmp(gsTextArgs[1], "flags") == 0 )
+               {
+                       if( giTextArgc < 4 || giTextArgc > 5 ) {
+                               fprintf(stderr, "Error: `dispense user type` requires two arguments\n");
+                               ShowUsage();
+                               return RV_ARGUMENTS;
+                       }
                        
-                       // Add new user?
-                       if( strcmp(argv[i+1], "add") == 0 )
-                       {
-                               if( i + 2 >= argc ) {
-                                       fprintf(stderr, "Error: `dispense user add` requires an argument\n");
-                                       ShowUsage();
-                                       exit(1);
-                               }
+                       if( giTextArgc == 4 )
+                               ret = Dispense_SetUserType(sock, gsTextArgs[2], gsTextArgs[3], "");
+                       else
+                               ret = Dispense_SetUserType(sock, gsTextArgs[2], gsTextArgs[3], gsTextArgs[4]);
+               }
+               else
+               {
+                       fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
+                       ShowUsage();
+                       return RV_ARGUMENTS;
+               }
+               close(sock);
+               return ret;
+       }
+       // Donation!
+       else if( strcmp(gsTextArgs[0], "donate") == 0 )
+       {
+               // Check argument count
+               if( giTextArgc != 3 ) {
+                       fprintf(stderr, "Error: `dispense donate` requires two arguments\n");
+                       ShowUsage();
+                       return RV_ARGUMENTS;
+               }
+               
+               // Connect to server
+               sock = OpenConnection(gsDispenseServer, giDispensePort);
+               if( sock < 0 )  return RV_SOCKET_ERROR;
+               
+               // Attempt authentication
+               ret = Authenticate(sock);
+               if(ret) return ret;
+               
+               // Do donation
+               ret = Dispense_Donate(sock, atoi(gsTextArgs[1]), gsTextArgs[2]);
                                
-                               Dispense_AddUser(sock, argv[i+2]);
+               close(sock);
+
+               return ret;
+       }
+       // Refund an item
+       else if( strcmp(gsTextArgs[0], "refund") == 0 )
+       {
+                int     price = 0;
+               // Check argument count
+               if( giTextArgc != 3 && giTextArgc != 4 ) {
+                       fprintf(stderr, "Error: `dispense refund` takes 2 or 3 arguments\n");
+                       ShowUsage();
+                       return RV_ARGUMENTS;
+               }
+       
+               // Connect to server
+               sock = OpenConnection(gsDispenseServer, giDispensePort);
+               if(sock < 0)    return RV_SOCKET_ERROR; 
+
+               // Attempt authentication
+               ret = Authenticate(sock);
+               if(ret) return ret;
+
+               if( giTextArgc == 4 ) {
+                       price = atoi(gsTextArgs[3]);
+                       if( price <= 0 ) {
+                               fprintf(stderr, "Error: Override price is invalid (should be > 0)\n");
+                               return RV_ARGUMENTS;
                        }
-                       // Update a user
-                       else if( strcmp(argv[i+1], "type") == 0 )
+               }
+
+               // Username, Item, cost
+               ret = Dispense_Refund(sock, gsTextArgs[1], gsTextArgs[2], price);
+
+               // TODO: More
+               close(sock);
+               return ret;
+       }
+       // Query an item price
+       else if( strcmp(gsTextArgs[0], "iteminfo") == 0 )
+       {
+               regmatch_t matches[3];
+               char    *type;
+                int    id;
+               // Check argument count
+               if( giTextArgc != 2 ) {
+                       fprintf(stderr, "Error: `dispense iteminfo` requires an argument\n");
+                       ShowUsage();
+                       return RV_ARGUMENTS;
+               }
+               // Parse item ID
+               if( RunRegex(&gUserItemIdentRegex, gsTextArgs[1], 3, matches, NULL) != 0 ) {
+                       fprintf(stderr, "Error: Invalid item ID passed (<type>:<id> expected)\n");
+                       return RV_ARGUMENTS;
+               }
+               type = gsTextArgs[1] + matches[1].rm_so;
+               gsTextArgs[1][ matches[1].rm_eo ] = '\0';
+               id = atoi( gsTextArgs[1] + matches[2].rm_so );
+
+               sock = OpenConnection(gsDispenseServer, giDispensePort);
+               if( sock < 0 )  return RV_SOCKET_ERROR;
+               
+               ret = Dispense_ItemInfo(sock, type, id);
+               close(sock);
+               return ret;
+       }
+       // Set slot
+       else if( strcmp(gsTextArgs[0], "slot") == 0 )
+       {
+               regmatch_t matches[3];
+               char    *item_type, *newname;
+                int    item_id, price;
+               
+               // Check arguments
+               if( giTextArgc != 4 ) {
+                       fprintf(stderr, "Error: `dispense slot` takes three arguments\n");
+                       ShowUsage();
+                       return RV_ARGUMENTS;
+               }
+               
+               // Parse arguments
+               if( RunRegex(&gUserItemIdentRegex, gsTextArgs[1], 3, matches, NULL) != 0 ) {
+                       fprintf(stderr, "Error: Invalid item ID passed (<type>:<id> expected)\n");
+                       return RV_ARGUMENTS;
+               }
+               item_type = gsTextArgs[1] + matches[1].rm_so;
+               gsTextArgs[1][ matches[1].rm_eo ] = '\0';
+               item_id = atoi( gsTextArgs[1] + matches[2].rm_so );
+
+               // - Price
+               price = atoi( gsTextArgs[2] );
+               if( price <= 0 && gsTextArgs[2][0] != '0' ) {
+                       fprintf(stderr, "Error: Invalid price passed (must be >= 0)\n");
+                       return RV_ARGUMENTS;
+               }
+               
+               // - New name
+               newname = gsTextArgs[3];
+               // -- Sanity
+               {
+                       char *pos;
+                       for( pos = newname; *pos; pos ++ )
                        {
-                               if( i + 3 >= argc ) {
-                                       fprintf(stderr, "Error: `dispense user type` requires two arguments\n");
-                                       ShowUsage();
-                                       exit(1);
+                               if( !isalnum(*pos) && *pos != ' ' ) {
+                                       fprintf(stderr, "Error: You should only have letters, numbers and spaces in an item name\n");
+                                       return RV_ARGUMENTS;
                                }
-                               
-                               Dispense_SetUserType(sock, argv[i+2], argv[i+3]);
-                       }
-                       else
-                       {
-                               fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
-                               ShowUsage();
-                               exit(1);
                        }
-                       return 0;
-               }
-               else {
-                       // Item name / pattern
-                       gsItemPattern = arg;
-                       break;
                }
+               
+               // Connect & Authenticate
+               sock = OpenConnection(gsDispenseServer, giDispensePort);
+               if( sock < 0 )  return RV_SOCKET_ERROR;
+               ret = Authenticate(sock);
+               if(ret) return ret;
+               // Update the slot
+               ret = Dispense_SetItem(sock, item_type, item_id, price, newname);
+               
+               close(sock);
+               return ret;
+       }
+       // Item name / pattern
+       else
+       {
+               gsItemPattern = gsTextArgs[0];
        }
        
        // Connect to server
        sock = OpenConnection(gsDispenseServer, giDispensePort);
-       if( sock < 0 )  return -1;
-       
-       // Authenticate
-       Authenticate(sock);
+       if( sock < 0 )  return RV_SOCKET_ERROR;
+
+       // Get the user's balance
+       ret = GetUserBalance(sock);
+       if(ret) return ret;
 
        // Get items
        PopulateItemList(sock);
        
-       if( gsItemPattern )
+       // Disconnect from server
+       close(sock);
+       
+       if( gsItemPattern && gsItemPattern[0] )
        {
-               // TODO: Implement `dispense <name>`
-               printf("TODO: Implement `dispense <name>`\n");
-               i = -1;
+               regmatch_t matches[3];
+               // Door (hard coded)
+               if( strcmp(gsItemPattern, "door") == 0 )
+               {
+                       // Connect, Authenticate, dispense and close
+                       sock = OpenConnection(gsDispenseServer, giDispensePort);
+                       if( sock < 0 )  return RV_SOCKET_ERROR;
+                       ret = Authenticate(sock);
+                       if(ret) return ret;
+                       ret = DispenseItem(sock, "door", 0);
+                       close(sock);
+                       return ret;
+               }
+               // Item id (<type>:<num>)
+               else if( RunRegex(&gUserItemIdentRegex, gsItemPattern, 3, matches, NULL) == 0 )
+               {
+                       char    *ident;
+                        int    id;
+                       
+                       // Get and finish ident
+                       ident = gsItemPattern + matches[1].rm_so;
+                       gsItemPattern[matches[1].rm_eo] = '\0';
+                       // Get ID
+                       id = atoi( gsItemPattern + matches[2].rm_so );
+                       
+                       // Connect, Authenticate, dispense and close
+                       sock = OpenConnection(gsDispenseServer, giDispensePort);
+                       if( sock < 0 )  return RV_SOCKET_ERROR;
+                       
+                       Dispense_ItemInfo(sock, ident, id);
+                       
+                       ret = Authenticate(sock);
+                       if(ret) return ret;
+                       ret = DispenseItem(sock, ident, id);
+                       close(sock);
+                       return ret;
+               }
+               // Item number (6 = coke)
+               else if( strcmp(gsItemPattern, "0") == 0 || atoi(gsItemPattern) > 0 )
+               {
+                       i = atoi(gsItemPattern);
+               }
+               // Item prefix
+               else
+               {
+                        int    j;
+                        int    best = -1;
+                       for( i = 0; i < giNumItems; i ++ )
+                       {
+                               // Prefix match (with case-insensitive match)
+                               for( j = 0; gsItemPattern[j]; j ++ )
+                               {
+                                       if( gaItems[i].Desc[j] == gsItemPattern[j] )
+                                               continue;
+                                       if( tolower(gaItems[i].Desc[j]) == tolower(gsItemPattern[j]) )
+                                               continue;
+                                       break;
+                               }
+                               // Check if the prefix matched
+                               if( gsItemPattern[j] != '\0' )
+                                       continue;
+                               
+                               // Prefect match
+                               if( gaItems[i].Desc[j] == '\0' ) {
+                                       best = i;
+                                       break;
+                               }
+                               
+                               // Only one match allowed
+                               if( best == -1 ) {
+                                       best = i;
+                               }
+                               else {
+                                       // TODO: Allow ambiguous matches?
+                                       // or just print a wanrning
+                                       printf("Warning - Ambiguous pattern, stopping\n");
+                                       return RV_BAD_ITEM;
+                               }
+                       }
+                       
+                       // Was a match found?
+                       if( best == -1 )
+                       {
+                               fprintf(stderr, "No item matches the passed string\n");
+                               return RV_BAD_ITEM;
+                       }
+                       
+                       i = best;
+               }
        }
-       else if( gbUseNCurses )
+       else if( giUIMode != UI_MODE_BASIC )
        {
                i = ShowNCursesUI();
        }
        else
        {
-               for( i = 0; i < giNumItems; i ++ ) {            
-                       printf("%2i %s\t%3i %s\n", i, gaItems[i].Ident, gaItems[i].Price, gaItems[i].Desc);
+               // Very basic dispense interface
+               for( i = 0; i < giNumItems; i ++ ) {
+                       // Add a separator
+                       if( i && strcmp(gaItems[i].Type, gaItems[i-1].Type) != 0 )
+                               printf("   ---\n");
+                       
+                       printf("%2i %s:%i\t%3i %s\n", i, gaItems[i].Type, gaItems[i].ID,
+                               gaItems[i].Price, gaItems[i].Desc);
                }
                printf(" q Quit\n");
                for(;;)
@@ -283,47 +792,34 @@ int main(int argc, char *argv[])
                }
        }
        
+       
        // Check for a valid item ID
        if( i >= 0 )
-               DispenseItem(sock, i);
+       {
+                int j;
+               // Connect, Authenticate, dispense and close
+               sock = OpenConnection(gsDispenseServer, giDispensePort);
+               if( sock < 0 )  return RV_SOCKET_ERROR;
+                       
+               ret = Dispense_ItemInfo(sock, gaItems[i].Type, gaItems[i].ID);
+               if(ret) return ret;
+               
+               ret = Authenticate(sock);
+               if(ret) return ret;
+               
+               for( j = 0; j < giDispenseCount; j ++ ) {
+                       ret = DispenseItem(sock, gaItems[i].Type, gaItems[i].ID);
+                       if( ret )       break;
+               }
+               if( j > 1 ) {
+                       printf("%i items dispensed\n", j);
+               }
+               close(sock);
+       }
 
-       close(sock);
+       Dispense_ShowUser(sock, gsUserName);
 
-       return 0;
-}
-
-void ShowUsage(void)
-{
-       printf(
-               "Usage:\n"
-               "    dispense\n"
-               "        Show interactive list\n"
-               "    dispense <item>\n"
-               "        Dispense named item\n"
-               "    dispense give <user> <ammount> \"<reason>\"\n"
-               "        Give some of your money away\n"
-               "    dispense acct [<user>]\n"
-               "        Show user balances\n"
-               "    dispense acct <user> [+-]<ammount> \"<reason>\"\n"
-               "        Alter a account value (Coke members only)\n"
-               "    dispense user add <user>\n"
-               "        Create new coke account (Wheel members only)\n"
-               "    dispense user type <flags>\n"
-               "        Alter a user's flags\n"
-               "        <flags> is a comma-separated list of user,coke,wheel,disabled\n"
-               "        Flags are removed by preceding the name with '-' or '!'\n"
-               "\n"
-               "General Options:\n"
-               "    -u <username>\n"
-               "        Set a different user (Coke members only)\n"
-               "    -h / -?\n"
-               "        Show help text\n"
-               "    -G\n"
-               "        Use alternate GUI\n"
-               "    -m <min balance>\n"
-               "    -M <max balance>\n"
-               "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
-               );
+       return ret;
 }
 
 // -------------------
@@ -334,31 +830,49 @@ void ShowUsage(void)
  */
 int ShowNCursesUI(void)
 {
-       // TODO: ncurses interface (with separation between item classes)
-       // - Hmm... that would require standardising the item ID to be <class>:<index>
-       // Oh, why not :)
         int    ch;
         int    i, times;
         int    xBase, yBase;
        const int       displayMinWidth = 40;
-       const int       displayMinItems = 8;
        char    *titleString = "Dispense";
-        int    itemCount = displayMinItems;
+        int    itemCount;
+        int    maxItemIndex;
         int    itemBase = 0;
-        int    currentItem = 0;
+        int    currentItem;
         int    ret = -2;       // -2: Used for marking "no return yet"
+       
+       char    balance_str[5+1+2+1];   // If $9999.99 is too little, something's wrong
+       char    *username;
+       struct passwd *pwd;
         
         int    height, width;
         
+       // Get Username
+       if( gsEffectiveUser )
+               username = gsEffectiveUser;
+       else {
+               pwd = getpwuid( getuid() );
+               username = pwd->pw_name;
+       }
+       // Get balance
+       snprintf(balance_str, sizeof balance_str, "$%i.%02i", giUserBalance/100, abs(giUserBalance)%100);
+       
        // Enter curses mode
        initscr();
-       raw(); noecho();
+       cbreak(); noecho();
        
-       // Get item count
+       // Get max index
+       maxItemIndex = ShowItemAt(0, 0, 0, -1, 0);
+       // Get item count per screen
        // - 6: randomly chosen (Need at least 3)
        itemCount = LINES - 6;
-       if( itemCount > giNumItems )
-               itemCount = giNumItems;
+       if( itemCount > maxItemIndex )
+               itemCount = maxItemIndex;
+       // Get first index
+       currentItem = 0;
+       while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
+               currentItem ++;
+       
        
        // Get dimensions
        height = itemCount + 3;
@@ -376,35 +890,35 @@ int ShowNCursesUI(void)
                // Items
                for( i = 0; i < itemCount; i ++ )
                {
+                        int    pos = 0;
+                       
                        move( yBase + 1 + i, xBase );
+                       printw("| ");
                        
-                       if( currentItem == itemBase + i ) {
-                               printw("| -> ");
-                       }
-                       else {
-                               printw("|    ");
-                       }
+                       pos += 2;
                        
-                       // Check for ... row
+                       // Check for the '...' row
                        // - Oh god, magic numbers!
-                       if( i == 0 && itemBase > 0 ) {
-                               printw("   ...");
-                               times = width-1 - 8 - 3;
-                               while(times--)  addch(' ');
-                       }
-                       else if( i == itemCount - 1 && itemBase < giNumItems - itemCount ) {
-                               printw("   ...");
-                               times = width-1 - 8 - 3;
+                       if( (i == 0 && itemBase > 0)
+                        || (i == itemCount - 1 && itemBase < maxItemIndex - itemCount) )
+                       {
+                               printw("     ...");     pos += 8;
+                               times = (width - pos) - 1;
                                while(times--)  addch(' ');
                        }
                        // Show an item
                        else {
-                               ShowItemAt( yBase + 1 + i, xBase + 5, width - 7, itemBase + i);
-                               addch(' ');
+                               ShowItemAt(
+                                       yBase + 1 + i, xBase + pos,     // Position
+                                       (width - pos) - 3,      // Width
+                                       itemBase + i,   // Index
+                                       !!(currentItem == itemBase + i) // Hilighted
+                                       );
+                               printw("  ");
                        }
                        
                        // Scrollbar (if needed)
-                       if( giNumItems > itemCount ) {
+                       if( maxItemIndex > itemCount ) {
                                if( i == 0 ) {
                                        addch('A');
                                }
@@ -412,7 +926,7 @@ int ShowNCursesUI(void)
                                        addch('V');
                                }
                                else {
-                                        int    percentage = itemBase * 100 / (giNumItems-itemCount);
+                                        int    percentage = itemBase * 100 / (maxItemIndex-itemCount);
                                        if( i-1 == percentage*(itemCount-3)/100 ) {
                                                addch('#');
                                        }
@@ -429,6 +943,12 @@ int ShowNCursesUI(void)
                // Footer
                PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
                
+               // User line
+               // - Username, balance, flags
+               PrintAlign(yBase+height-1, xBase+1, width-2,
+                       username, ' ', balance_str, ' ', gsUserFlags);
+               
+               
                // Get input
                ch = getch();
                
@@ -440,33 +960,49 @@ int ShowNCursesUI(void)
                                switch(ch)
                                {
                                case 'B':
-                                       //if( itemBase < giNumItems - (itemCount) )
-                                       //      itemBase ++;
-                                       if( currentItem < giNumItems - 1 )
+                                       currentItem ++;
+                                       // Skip over spacers
+                                       while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
                                                currentItem ++;
-                                       if( itemBase + itemCount - 1 <= currentItem && itemBase + itemCount < giNumItems )
-                                               itemBase ++;
+                                       
+                                       if( currentItem >= maxItemIndex ) {
+                                               currentItem = 0;
+                                               // Skip over spacers
+                                               while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
+                                                       currentItem ++;
+                                       }
                                        break;
                                case 'A':
-                                       //if( itemBase > 0 )
-                                       //      itemBase --;
-                                       if( currentItem > 0 )
+                                       currentItem --;
+                                       // Skip over spacers
+                                       while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
                                                currentItem --;
-                                       if( itemBase + 1 > currentItem && itemBase > 0 )
-                                               itemBase --;
+                                       
+                                       if( currentItem < 0 ) {
+                                               currentItem = maxItemIndex - 1;
+                                               // Skip over spacers
+                                               while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
+                                                       currentItem --;
+                                       }
                                        break;
                                }
                        }
                        else {
                                
                        }
+                       
+                       if( itemCount > maxItemIndex && currentItem < itemBase + 2 && itemBase > 0 )
+                               itemBase = currentItem - 2;
+                       if( itemCount > maxItemIndex && currentItem > itemBase + itemCount - 2 && itemBase < maxItemIndex-1 )
+                               itemBase = currentItem - itemCount + 2;
                }
                else {
                        switch(ch)
                        {
                        case '\n':
-                               ret = currentItem;
+                               ret = ShowItemAt(0, 0, 0, currentItem, 0);
                                break;
+                       case 0x1b:      // Escape
                        case 'q':
                                ret = -1;       // -1: Return with no dispense
                                break;
@@ -486,32 +1022,113 @@ int ShowNCursesUI(void)
 
 /**
  * \brief Show item \a Index at (\a Col, \a Row)
+ * \return Dispense index of item
  * \note Part of the NCurses UI
  */
-void ShowItemAt(int Row, int Col, int Width, int Index)
+int ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted)
 {
         int    _x, _y, times;
-       char    *name;
-        int    price;
+       char    *name = NULL;
+        int    price = 0;
+        int    status = -1;
        
-       move( Row, Col );
-       
-       if( Index < 0 || Index >= giNumItems ) {
-               name = "OOR";
-               price = 0;
-       }
-       else {
+       switch(giUIMode)
+       {
+       // Standard UI
+       // - This assumes that 
+       case UI_MODE_STANDARD:
+               // Bounds check
+               // Index = -1, request limit
+               if( Index < 0 || Index >= giNumItems+2 )
+                       return giNumItems+2;
+               // Drink label
+               if( Index == 0 )
+               {
+                       price = 0;
+                       name = "Coke Machine";
+                       Index = -1;     // -1 indicates a label
+                       break;
+               }
+               Index --;
+               // Drinks 0 - 6
+               if( Index <= 6 )
+               {
+                       name = gaItems[Index].Desc;
+                       price = gaItems[Index].Price;
+                       status = gaItems[Index].Status;
+                       break;
+               }
+               Index -= 7;
+               // EPS label
+               if( Index == 0 )
+               {
+                       price = 0;
+                       name = "Electronic Payment System";
+                       Index = -1;     // -1 indicates a label
+                       break;
+               }
+               Index --;
+               Index += 7;
                name = gaItems[Index].Desc;
                price = gaItems[Index].Price;
+               status = gaItems[Index].Status;
+               break;
+       default:
+               return -1;
        }
-
-       printw("%02i %s", Index, name);
        
-       getyx(stdscr, _y, _x);
-       // Assumes max 4 digit prices
-       times = Width - 4 - (_x - Col); // TODO: Better handling for large prices
-       while(times--)  addch(' ');
-       printw("%4i", price);
+       // Width = 0, don't print
+       if( Width > 0 )
+       {
+               // 4 preceding, 5 price
+               int nameWidth = Width - 4 - 5;
+               move( Row, Col );
+               
+               if( Index >= 0 )
+               {
+                       // Show hilight and status
+                       switch( status )
+                       {
+                       case 0:
+                               if( bHilighted )
+                                       printw("->  ");
+                               else
+                                       printw("    ");
+                               break;
+                       case 1:
+                               printw("SLD ");
+                               break;
+                       
+                       default:
+                       case -1:
+                               printw("ERR ");
+                               break;
+                       }
+                       
+                       printw("%-*.*s", nameWidth, nameWidth, name);
+               
+//                     getyx(stdscr, _y, _x);
+                       // Assumes max 4 digit prices
+//                     times = Width - 5 - (_x - Col); // TODO: Better handling for large prices
+//                     while(times--)  addch(' ');
+                       
+                       printw(" %4i", price);
+               }
+               else
+               {
+                       printw("-- %s", name);
+                       getyx(stdscr, _y, _x);
+                       times = Width - 4 - (_x - Col);
+                       while(times--)  addch(' ');
+                       printw("    ");
+               }
+       }
+       
+       // If the item isn't availiable for sale, return -1 (so it's skipped)
+       if( status || price > giUserBalance )
+               Index = -1;
+       
+       return Index;
 }
 
 /**
@@ -556,7 +1173,7 @@ void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
                addstr(tmp);
        }
        // - Left padding
-       times = Width/2 - mLen/2 - lLen;
+       times = (Width - mLen)/2 - lLen;
        while(times--)  addch(Pad1);
        // - Middle
        {
@@ -565,7 +1182,8 @@ void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
                addstr(tmp);
        }
        // - Right Padding
-       times = Width/2 - mLen/2 - rLen;
+       times = (Width - mLen)/2 - rLen;
+       if( (Width - mLen) % 2 )        times ++;
        while(times--)  addch(Pad2);
        // - Right
        {
@@ -602,22 +1220,37 @@ int OpenConnection(const char *Host, int Port)
                fprintf(stderr, "Failed to create socket\n");
                return -1;
        }
+
+//     printf("geteuid() = %i, getuid() = %i\n", geteuid(), getuid());
        
-       #if USE_AUTOAUTH
+       if( geteuid() == 0 || getuid() == 0 )
        {
+                int    i;
                struct sockaddr_in      localAddr;
                memset(&localAddr, 0, sizeof(localAddr));
                localAddr.sin_family = AF_INET; // IPv4
-               localAddr.sin_port = 1023;      // IPv4
-               // Attempt to bind to low port for autoauth
-               bind(sock, &localAddr, sizeof(localAddr));
+               
+               // Loop through all the top ports until one is avaliable
+               for( i = 512; i < 1024; i ++)
+               {
+                       localAddr.sin_port = htons(i);  // IPv4
+                       // Attempt to bind to low port for autoauth
+                       if( bind(sock, (struct sockaddr*)&localAddr, sizeof(localAddr)) == 0 )
+                               break;
+               }
+               if( i == 1024 )
+                       printf("Warning: AUTOAUTH unavaliable\n");
+//             else
+//                     printf("Bound to 0.0.0.0:%i\n", i);
        }
-       #endif
        
        if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
                fprintf(stderr, "Failed to connect to server\n");
                return -1;
        }
+
+       // We're not authenticated if the connection has just opened
+       gbIsAuthenticated = 0;
        
        return sock;
 }
@@ -631,9 +1264,11 @@ int Authenticate(int Socket)
        struct passwd   *pwd;
        char    *buf;
         int    responseCode;
+       #if ATTEMPT_PASSWORD_AUTH
        char    salt[32];
         int    i;
        regmatch_t      matches[4];
+       #endif
        
        if( gbIsAuthenticated ) return 0;
        
@@ -649,14 +1284,14 @@ int Authenticate(int Socket)
        responseCode = atoi(buf);
        switch( responseCode )
        {
-       
-       case 200:       // Authenticated, return :)
+       case 200:       // Autoauth succeeded, return
                free(buf);
                break;
        
        case 401:       // Untrusted, attempt password authentication
                free(buf);
-               
+
+               #if ATTEMPT_PASSWORD_AUTH       
                sendf(Socket, "USER %s\n", pwd->pw_name);
                printf("Using username %s\n", pwd->pw_name);
                
@@ -670,7 +1305,7 @@ int Authenticate(int Socket)
                if( responseCode != 100 ) {
                        fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
                        free(buf);
-                       return -1;      // ERROR
+                       return RV_UNKNOWN_ERROR;        // ERROR
                }
                
                // Check for salt
@@ -716,23 +1351,28 @@ int Authenticate(int Socket)
                        
                        fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
                        free(buf);
-                       return -1;
+                       return RV_UNKNOWN_ERROR;
                }
                free(buf);
                if( i == 3 )
-                       return 2;       // 2 = Bad Password
+                       return RV_INVALID_USER; // 2 = Bad Password
+               
+               #else
+               fprintf(stderr, "Untrusted host, AUTOAUTH unavaliable\n");
+               return RV_INVALID_USER;
+               #endif
                break;
        
        case 404:       // Bad Username
                fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
                free(buf);
-               return 1;
+               return RV_INVALID_USER;
        
        default:
                fprintf(stderr, "Unkown response code %i from server\n", responseCode);
                printf("%s\n", buf);
                free(buf);
-               return -1;
+               return RV_UNKNOWN_ERROR;
        }
        
        // Set effective user
@@ -751,18 +1391,18 @@ int Authenticate(int Socket)
                case 403:
                        printf("Only coke members can use `dispense -u`\n");
                        free(buf);
-                       return -1;
+                       return RV_PERMISSIONS;
                
                case 404:
                        printf("Invalid user selected\n");
                        free(buf);
-                       return -1;
+                       return RV_INVALID_USER;
                
                default:
                        fprintf(stderr, "Unkown response code %i from server\n", responseCode);
                        printf("%s\n", buf);
                        free(buf);
-                       exit(-1);
+                       return RV_UNKNOWN_ERROR;
                }
                
                free(buf);
@@ -773,6 +1413,120 @@ int Authenticate(int Socket)
        return 0;
 }
 
+int GetUserBalance(int Socket)
+{
+       regmatch_t      matches[6];
+       struct passwd   *pwd;
+       char    *buf;
+        int    responseCode;
+       
+       if( !gsUserName )
+       {
+               if( gsEffectiveUser ) {
+                       gsUserName = gsEffectiveUser;
+               }
+               else {
+                       pwd = getpwuid( getuid() );
+                       gsUserName = strdup(pwd->pw_name);
+               }
+       }
+       
+       sendf(Socket, "USER_INFO %s\n", gsUserName);
+       buf = ReadLine(Socket);
+       responseCode = atoi(buf);
+       switch(responseCode)
+       {
+       case 202:       break;  // Ok
+       
+       case 404:
+               printf("Invalid user? (USER_INFO failed)\n");
+               free(buf);
+               return RV_INVALID_USER;
+       
+       default:
+               fprintf(stderr, "Unkown response code %i from server\n", responseCode);
+               printf("%s\n", buf);
+               free(buf);
+               return RV_UNKNOWN_ERROR;
+       }
+
+       RunRegex(&gUserInfoRegex, buf, 6, matches, "Malformed server response");
+       
+       giUserBalance = atoi( buf + matches[4].rm_so );
+       gsUserFlags = strdup( buf + matches[5].rm_so );
+       
+       free(buf);
+       
+       return 0;
+}
+
+/**
+ * \brief Read an item info response from the server
+ * \param Dest Destination for the read item (strings will be on the heap)
+ */
+int ReadItemInfo(int Socket, tItem *Dest)
+{
+       char    *buf;
+        int    responseCode;
+       
+       regmatch_t      matches[8];
+       char    *statusStr;
+       
+       // Get item info
+       buf = ReadLine(Socket);
+       responseCode = atoi(buf);
+       
+       switch(responseCode)
+       {
+       case 202:       break;
+       
+       case 406:
+               printf("Bad item name\n");
+               free(buf);
+               return RV_BAD_ITEM;
+       
+       default:
+               fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n%s", responseCode, buf);
+               free(buf);
+               return RV_UNKNOWN_ERROR;
+       }
+       
+       RunRegex(&gItemRegex, buf, 8, matches, "Malformed server response");
+       
+       buf[ matches[3].rm_eo ] = '\0';
+       buf[ matches[5].rm_eo ] = '\0';
+       buf[ matches[7].rm_eo ] = '\0';
+       
+       statusStr = &buf[ matches[5].rm_so ];
+       
+       Dest->ID = atoi( buf + matches[4].rm_so );
+       
+       if( strcmp(statusStr, "avail") == 0 )
+               Dest->Status = 0;
+       else if( strcmp(statusStr, "sold") == 0 )
+               Dest->Status = 1;
+       else if( strcmp(statusStr, "error") == 0 )
+               Dest->Status = -1;
+       else {
+               fprintf(stderr, "Unknown response from dispense server (status '%s')\n",
+                       statusStr);
+               return RV_UNKNOWN_ERROR;
+       }
+       Dest->Price = atoi( buf + matches[6].rm_so );
+       
+       // Hack a little to reduce heap fragmentation
+       {
+               char    tmpType[strlen(buf + matches[3].rm_so) + 1];
+               char    tmpDesc[strlen(buf + matches[7].rm_so) + 1];
+               strcpy(tmpType, buf + matches[3].rm_so);
+               strcpy(tmpDesc, buf + matches[7].rm_so);
+               free(buf);
+               Dest->Type = strdup( tmpType );
+               Dest->Desc = strdup( tmpDesc );
+       }
+       
+       return 0;
+}
 
 /**
  * \brief Fill the item information structure
@@ -783,7 +1537,7 @@ void PopulateItemList(int Socket)
        char    *buf;
         int    responseCode;
        
-       char    *itemType, *itemStart;
+       char    *arrayType;
         int    count, i;
        regmatch_t      matches[4];
        
@@ -796,7 +1550,7 @@ void PopulateItemList(int Socket)
        responseCode = atoi(buf);
        if( responseCode != 201 ) {
                fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
-               exit(-1);
+               exit(RV_UNKNOWN_ERROR);
        }
        
        // - Get item list -
@@ -806,19 +1560,16 @@ void PopulateItemList(int Socket)
        //  202 Item <count>
        RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
                
-       itemType = &buf[ matches[2].rm_so ];    buf[ matches[2].rm_eo ] = '\0';
+       arrayType = &buf[ matches[2].rm_so ];   buf[ matches[2].rm_eo ] = '\0';
        count = atoi( &buf[ matches[3].rm_so ] );
                
        // Check array type
-       if( strcmp(itemType, "Items") != 0 ) {
+       if( strcmp(arrayType, "Items") != 0 ) {
                // What the?!
                fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
-                       itemType);
-               exit(-1);
+                       arrayType);
+               exit(RV_UNKNOWN_ERROR);
        }
-               
-       itemStart = &buf[ matches[3].rm_eo ];
-       
        free(buf);
        
        giNumItems = count;
@@ -827,26 +1578,7 @@ void PopulateItemList(int Socket)
        // Fetch item information
        for( i = 0; i < giNumItems; i ++ )
        {
-               regmatch_t      matches[6];
-               
-               // Get item info
-               buf = ReadLine(Socket);
-               responseCode = atoi(buf);
-               
-               if( responseCode != 202 ) {
-                       fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
-                       exit(-1);
-               }
-               
-               RunRegex(&gItemRegex, buf, 6, matches, "Malformed server response");
-               
-               buf[ matches[3].rm_eo ] = '\0';
-               
-               gaItems[i].Ident = strdup( buf + matches[3].rm_so );
-               gaItems[i].Price = atoi( buf + matches[4].rm_so );
-               gaItems[i].Desc = strdup( buf + matches[5].rm_so );
-               
-               free(buf);
+               ReadItemInfo( Socket, &gaItems[i] );
        }
        
        // Read end of list
@@ -863,19 +1595,50 @@ void PopulateItemList(int Socket)
        free(buf);
 }
 
+
+/**
+ * \brief Get information on an item
+ * \return Boolean Failure
+ */
+int Dispense_ItemInfo(int Socket, const char *Type, int ID)
+{
+       tItem   item;
+        int    ret;
+       
+       // Query
+       sendf(Socket, "ITEM_INFO %s:%i\n", Type, ID);
+       
+       ret = ReadItemInfo(Socket, &item);
+       if(ret) return ret;
+       
+       printf("%8s:%-2i %2i.%02i %s\n",
+               item.Type, item.ID,
+               item.Price/100, item.Price%100,
+               item.Desc);
+       
+       free(item.Type);
+       free(item.Desc);
+       
+       return 0;
+}
+
 /**
  * \brief Dispense an item
  * \return Boolean Failure
  */
-int DispenseItem(int Socket, int ItemID)
+int DispenseItem(int Socket, const char *Type, int ID)
 {
         int    ret, responseCode;
        char    *buf;
        
-       if( ItemID < 0 || ItemID > giNumItems ) return -1;
+       // Check for a dry run
+       if( gbDryRun ) {
+               printf("Dry Run - No action\n");
+               return 0;
+       }
        
        // Dispense!
-       sendf(Socket, "DISPENSE %s\n", gaItems[ItemID].Ident);
+       sendf(Socket, "DISPENSE %s:%i\n", Type, ID);
        buf = ReadLine(Socket);
        
        responseCode = atoi(buf);
@@ -887,27 +1650,27 @@ int DispenseItem(int Socket, int ItemID)
                break;
        case 401:
                printf("Not authenticated\n");
-               ret = 1;
+               ret = RV_PERMISSIONS;
                break;
        case 402:
                printf("Insufficient balance\n");
-               ret = 1;
+               ret = RV_BALANCE;
                break;
        case 406:
-               printf("Bad item name, bug report\n");
-               ret = 1;
+               printf("Bad item name\n");
+               ret = RV_BAD_ITEM;
                break;
        case 500:
                printf("Item failed to dispense, is the slot empty?\n");
-               ret = 1;
+               ret = RV_SERVER_ERROR;
                break;
        case 501:
                printf("Dispense not possible (slot empty/permissions)\n");
-               ret = 1;
+               ret = RV_SERVER_ERROR;
                break;
        default:
                printf("Unknown response code %i ('%s')\n", responseCode, buf);
-               ret = -2;
+               ret = RV_UNKNOWN_ERROR;
                break;
        }
        
@@ -921,11 +1684,70 @@ int DispenseItem(int Socket, int ItemID)
 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
 {
        char    *buf;
-        int    responseCode;
+        int    responseCode, rv = -1;
+       
+       // Check for a dry run
+       if( gbDryRun ) {
+               printf("Dry Run - No action\n");
+               return 0;
+       }
+
+       // Sanity
+       if( Ammount == 0 ) {
+               printf("An ammount would be nice\n");
+               return RV_ARGUMENTS;
+       }
        
        sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
        buf = ReadLine(Socket);
        
+       responseCode = atoi(buf);
+       
+       switch(responseCode)
+       {
+       case 200:
+               rv = 0; // OK
+               break;
+       case 402:
+               fprintf(stderr, "Insufficient balance\n");
+               rv = RV_BAD_ITEM;
+               break;
+       case 403:       // Not in coke
+               fprintf(stderr, "You are not in coke (sucker)\n");
+               rv = RV_PERMISSIONS;
+               break;
+       case 404:       // Unknown user
+               fprintf(stderr, "Unknown user '%s'\n", Username);
+               rv = RV_INVALID_USER;
+               break;
+       default:
+               fprintf(stderr, "Unknown response code %i\n'%s'\n", responseCode, buf);
+               rv = RV_UNKNOWN_RESPONSE;
+               break;
+       }
+       free(buf);
+       
+       return rv;
+}
+
+/**
+ * \brief Set a user's balance
+ * \note Only avaliable to dispense admins
+ */
+int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
+{
+       char    *buf;
+        int    responseCode;
+       
+       // Check for a dry run
+       if( gbDryRun ) {
+               printf("Dry Run - No action\n");
+               return 0;
+       }
+       
+       sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
+       buf = ReadLine(Socket);
+       
        responseCode = atoi(buf);
        free(buf);
        
@@ -933,28 +1755,148 @@ int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const c
        {
        case 200:       return 0;       // OK
        case 403:       // Not in coke
-               fprintf(stderr, "You are not in coke (sucker)\n");
-               return 1;
+               fprintf(stderr, "You are not an admin\n");
+               return RV_PERMISSIONS;
        case 404:       // Unknown user
                fprintf(stderr, "Unknown user '%s'\n", Username);
-               return 2;
+               return RV_INVALID_USER;
        default:
                fprintf(stderr, "Unknown response code %i\n", responseCode);
-               return -1;
+               return RV_UNKNOWN_RESPONSE;
        }
        
        return -1;
 }
 
 /**
- * \brief Alter a user's balance
+ * \brief Give money to another user
+ */
+int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
+{
+       char    *buf;
+        int    responseCode;
+       
+       if( Ammount < 0 ) {
+               printf("Sorry, you can only give, you can't take.\n");
+               return RV_ARGUMENTS;
+       }
+       
+       // Fast return on zero
+       if( Ammount == 0 ) {
+               printf("Are you actually going to give any?\n");
+               return RV_ARGUMENTS;
+       }
+       
+       // Check for a dry run
+       if( gbDryRun ) {
+               printf("Dry Run - No action\n");
+               return 0;
+       }
+       
+       sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
+
+       buf = ReadLine(Socket);
+       responseCode = atoi(buf);
+       free(buf);      
+       switch(responseCode)
+       {
+       case 200:
+               printf("Give succeeded\n");
+               return RV_SUCCESS;      // OK
+       
+       case 402:       
+               fprintf(stderr, "Insufficient balance\n");
+               return RV_BALANCE;
+       
+       case 404:       // Unknown user
+               fprintf(stderr, "Unknown user '%s'\n", Username);
+               return RV_INVALID_USER;
+       
+       default:
+               fprintf(stderr, "Unknown response code %i\n", responseCode);
+               return RV_UNKNOWN_RESPONSE;
+       }
+       
+       return -1;
+}
+
+int Dispense_Refund(int Socket, const char *Username, const char *Item, int PriceOverride)
+{
+       char    *buf;
+        int    responseCode, ret = -1;
+       
+       // Check item id
+       if( RunRegex(&gUserItemIdentRegex, Item, 0, NULL, NULL) != 0 )
+       {
+               fprintf(stderr, "Error: Invalid item ID passed (should be <type>:<num>)\n");
+               return RV_ARGUMENTS;
+       }
+
+       // Check username (quick)
+       if( strchr(Username, ' ') || strchr(Username, '\n') )
+       {
+               fprintf(stderr, "Error: Username is invalid (no spaces or newlines please)\n");
+               return RV_ARGUMENTS;
+       }
+
+       // Send the query
+       sendf(Socket, "REFUND %s %s %i\n", Username, Item, PriceOverride);
+
+       buf = ReadLine(Socket);
+       responseCode = atoi(buf);
+       switch(responseCode)
+       {
+       case 200:
+               Dispense_ShowUser(Socket, Username);    // Show destination account
+               ret = 0;
+               break;
+       case 403:
+               fprintf(stderr, "Refund access is only avaliable to coke members\n");
+               ret = RV_PERMISSIONS;
+               break;
+       case 404:
+               fprintf(stderr, "Unknown user '%s' passed\n", Username);
+               ret = RV_INVALID_USER;
+               break;
+       case 406:
+               fprintf(stderr, "Invalid item '%s' passed\n", Item);
+               ret = RV_BAD_ITEM;
+               break;
+       default:
+               fprintf(stderr, "Unknown response from server %i\n%s\n", responseCode, buf);
+               ret = -1;
+               break;
+       }
+       free(buf);
+       return ret;
+}
+
+/**
+ * \brief Donate money to the club
  */
-int Dispense_SetBalance(int Socket, const char *Username, int Ammount, const char *Reason)
+int Dispense_Donate(int Socket, int Ammount, const char *Reason)
 {
        char    *buf;
         int    responseCode;
        
-       sendf(Socket, "SET %s %i %s\n", Username, Ammount, Reason);
+       if( Ammount < 0 ) {
+               printf("Sorry, you can only give, you can't take.\n");
+               return -1;
+       }
+       
+       // Fast return on zero
+       if( Ammount == 0 ) {
+               printf("Are you actually going to give any?\n");
+               return 1;
+       }
+       
+       // Check for a dry run
+       if( gbDryRun ) {
+               printf("Dry Run - No action\n");
+               return 0;
+       }
+       
+       sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
        buf = ReadLine(Socket);
        
        responseCode = atoi(buf);
@@ -963,12 +1905,11 @@ int Dispense_SetBalance(int Socket, const char *Username, int Ammount, const cha
        switch(responseCode)
        {
        case 200:       return 0;       // OK
-       case 403:       // Not in coke
-               fprintf(stderr, "You are not in coke (sucker)\n");
+       
+       case 402:       
+               fprintf(stderr, "Insufficient balance\n");
                return 1;
-       case 404:       // Unknown user
-               fprintf(stderr, "Unknown user '%s'\n", Username);
-               return 2;
+       
        default:
                fprintf(stderr, "Unknown response code %i\n", responseCode);
                return -1;
@@ -989,15 +1930,15 @@ int Dispense_EnumUsers(int Socket)
        
        if( giMinimumBalance != INT_MIN ) {
                if( giMaximumBalance != INT_MAX ) {
-                       sendf(Socket, "ENUM_USERS %i %i\n", giMinimumBalance, giMaximumBalance);
+                       sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
                }
                else {
-                       sendf(Socket, "ENUM_USERS %i\n", giMinimumBalance);
+                       sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
                }
        }
        else {
                if( giMaximumBalance != INT_MAX ) {
-                       sendf(Socket, "ENUM_USERS %i\n", giMaximumBalance);
+                       sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
                }
                else {
                        sendf(Socket, "ENUM_USERS\n");
@@ -1101,7 +2042,7 @@ void _PrintUserLine(const char *Line)
                flags[flagsLen] = '\0';
                
                bal = atoi(Line + matches[4].rm_so);
-               printf("%-15s: $%4i.%02i (%s)\n", username, bal/100, bal%100, flags);
+               printf("%-15s: $%8.02f (%s)\n", username, ((float)bal)/100, flags);
        }
 }
 
@@ -1110,6 +2051,12 @@ int Dispense_AddUser(int Socket, const char *Username)
        char    *buf;
         int    responseCode, ret;
        
+       // Check for a dry run
+       if( gbDryRun ) {
+               printf("Dry Run - No action\n");
+               return 0;
+       }
+       
        sendf(Socket, "USER_ADD %s\n", Username);
        
        buf = ReadLine(Socket);
@@ -1143,14 +2090,20 @@ int Dispense_AddUser(int Socket, const char *Username)
        return ret;
 }
 
-int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString)
+int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString, const char *Reason)
 {
        char    *buf;
         int    responseCode, ret;
        
+       // Check for a dry run
+       if( gbDryRun ) {
+               printf("Dry Run - No action\n");
+               return 0;
+       }
+       
        // TODO: Pre-validate the string
        
-       sendf(Socket, "USER_FLAGS %s %s\n", Username, TypeString);
+       sendf(Socket, "USER_FLAGS %s %s %s\n", Username, TypeString, Reason);
        
        buf = ReadLine(Socket);
        responseCode = atoi(buf);
@@ -1163,19 +2116,63 @@ int Dispense_SetUserType(int Socket, const char *Username, const char *TypeStrin
                break;
                
        case 403:
-               printf("Only wheel can modify users\n");
-               ret = 1;
+               printf("Only dispense admins can modify users\n");
+               ret = RV_PERMISSIONS;
                break;
        
        case 404:
                printf("User '%s' does not exist\n", Username);
-               ret = 0;
+               ret = RV_INVALID_USER;
                break;
        
        case 407:
                printf("Flag string is invalid\n");
+               ret = RV_ARGUMENTS;
+               break;
+       
+       default:
+               fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
+               ret = RV_UNKNOWN_RESPONSE;
+               break;
+       }
+       
+       free(buf);
+       
+       return ret;
+}
+
+int Dispense_SetItem(int Socket, const char *Type, int ID, int NewPrice, const char *NewName)
+{
+       char    *buf;
+        int    responseCode, ret;
+       
+       // Check for a dry run
+       if( gbDryRun ) {
+               printf("Dry Run - No action\n");
+               return 0;
+       }
+       
+       sendf(Socket, "UPDATE_ITEM %s:%i %i %s\n", Type, ID, NewPrice, NewName);
+       
+       buf = ReadLine(Socket);
+       responseCode = atoi(buf);
+       
+       switch(responseCode)
+       {
+       case 200:
+               printf("Item %s:%i updated\n", Type, ID);
                ret = 0;
                break;
+               
+       case 403:
+               printf("Only coke members can modify the slots\n");
+               ret = RV_PERMISSIONS;
+               break;
+       
+       case 406:
+               printf("Invalid item passed\n");
+               ret = RV_BAD_ITEM;
+               break;
        
        default:
                fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
@@ -1203,8 +2200,8 @@ char *ReadLine(int Socket)
        
        #if DEBUG_TRACE_SERVER
        printf("ReadLine: ");
-       #endif
        fflush(stdout);
+       #endif
        
        ret[0] = '\0';
        
@@ -1215,8 +2212,12 @@ char *ReadLine(int Socket)
                }
                else {
                        len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
-                       buf[bufPos+len] = '\0';
+                       if( len < 0 ) {
+                               free(ret);
+                               return strdup("599 Client Connection Error\n");
+                       }
                }
+               buf[bufPos+len] = '\0';
                
                newline = strchr( buf+bufPos, '\n' );
                if( newline ) {
@@ -1288,7 +2289,7 @@ int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *match
         int    ret;
        
        ret = regexec(regex, string, nMatches, matches, 0);
-       if( ret ) {
+       if( ret && errorMessage ) {
                size_t  len = regerror(ret, regex, NULL, 0);
                char    errorStr[len];
                regerror(ret, regex, errorStr, len);

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