Code System - Samp

#include <a_samp>
#include <dini>

#define CODES_FILE "Codes.ini"
#define DIALOG_ID_CODE 100
#define EXTRA_CASH 10000
#define MINIGUN_AMMO 100000

new string[30];
new str[128];
new const charset[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

public OnFilterScriptInit()
{
	print("\n--------------------------------------");
	print(" Codes and Prizes                        ");
	print("--------------------------------------\n");
}

public OnFilterScriptExit()
{
    print("\n--------------------------------------");
	print(" Codes and Prizes                    ");
	print("--------------------------------------\n");
}

public OnGameModeInit()
{
	if(!fexist(CODES_FILE))
	    dini_Create(CODES_FILE);
}

public OnPlayerCommandText(playerid, cmdtext[])
{
	new cmd[256], tmp[256], idx;
	cmd = strtok(cmdtext,idx);
	if(!strcmp(cmd, "/CreateCode", true) && IsPlayerAdmin(playerid))
	{
	    tmp = strtok(cmdtext,idx);
	    if(!strlen(tmp))
	    {
	        SendClientMessage(playerid, 0xffee00ff, "USAGE: /CreateCode [Type]");
	        SendClientMessage(playerid, 0xffee00ff, "Type 1: Extra Cash.");
	        SendClientMessage(playerid, 0xffee00ff, "Type 2: Minigun.");
	        SendClientMessage(playerid, 0xffee00ff, "Type 3: Rhino.");
	        return SendClientMessage(playerid, 0xffee00ff, "Type 4: Vehicle Speed.");
		}
		do
		{
			for(new i; i < 15; i++)
		        string[i] = charset[RandomEx(0, sizeof(charset) - 1)];
		}
		while(dini_Isset(CODES_FILE, string));
		dini_IntSet(CODES_FILE, string, strval(tmp));
		format(str, sizeof(str), "The Code: %s\nType: %s\nRemember To Write Down The Code!", string, GetCodeType(strval(tmp)));
		return ShowPlayerDialog(playerid, DIALOG_ID_CODE, DIALOG_STYLE_MSGBOX, "Prize Code Created!", str, "OK", "OK");
	}
	if(!strcmp(cmd, "/UseCode", true))
	{
	    tmp = strtok(cmdtext,idx);
	    if(!strlen(tmp))return SendClientMessage(playerid, 0xffee00ff, "USAGE: /UseCode [Code]");
	    if(!dini_Isset(CODES_FILE, tmp))return SendClientMessage(playerid, 0xFF0000FF, "ERROR: The Code You Have Entered Doesn't Exist.");
	    if(!dini_Int(CODES_FILE, tmp))return SendClientMessage(playerid, 0xFF0000FF, "ERROR: The Code You Have Entered Is Already Used.");
		switch(dini_Int(CODES_FILE, tmp))
		{
		    case 1: GivePlayerMoney(playerid, EXTRA_CASH);
		    case 2: GivePlayerWeapon(playerid, WEAPON_MINIGUN, MINIGUN_AMMO);
		    case 3:
		    {
		        new Float:Pos[4], RhinoID;
		        GetPlayerPos(playerid, Pos[0], Pos[1], Pos[2]);
		        GetPlayerFacingAngle(playerid, Pos[3]);
		        RhinoID = CreateVehicle(432, Pos[0], Pos[1], Pos[2], Pos[3], -1, -1, -1);
		        PutPlayerInVehicle(playerid, RhinoID, 0);
		    }
		    case 4:
		    {
		        if(!IsPlayerInAnyVehicle(playerid))return SendClientMessage(playerid, 0xFF0000FF, "ERROR: This Code Requires Vehicle.");
		        new Float:Pos[3], Dv, Multiple;
		        GetVehicleVelocity(GetPlayerVehicleID(playerid), Pos[0], Pos[1], Pos[2]);
		        Multiple = ((50 + Dv * 100) / (Dv * 100));
		        SetVehicleVelocity(GetPlayerVehicleID(playerid), Pos[0] * Multiple, Pos[1] * Multiple, Pos[2] * Multiple);
		    }
		}
		format(str, sizeof(str), "You Have Used The Code And Got: %s.", GetCodeType(dini_Int(CODES_FILE,tmp)));
		SendClientMessage(playerid, 0x009900ff, str);
	    return dini_IntSet(CODES_FILE, tmp, 0);
	}
	return 0;
}

stock GetCodeType(num)
{
	new type[50];
	switch(num)
	{
		case 1: type = "Extra Cash";
		case 2: type = "Minigun";
		case 3: type = "Rhino";
		case 4: type = "Vehicle Speed";
	}
	return type;
}

RandomEx(min, max)
	return random(max - min) + min;