public static bool Delete(string file)
{
// Init SD card
if (!MountCheck())
{
return(false);
}
// Check if file exist
if (!FileExists(file))
{
return(true);
}
try
{
// Write data
sdCard.StorageDevice.Delete(file);
VolumeInfo.GetVolumes()[0].FlushAll();
}
catch (Exception e)
{
DebugOnly.Print("ERROR: Exception while deleting \"" + file + "\": " + e);
return(false);
}
DebugOnly.Print("File \"" + file + "\" successfully deleted");
return(true);
}
// Loads userlist from server
private static bool requestUsers()
{
// Create URL
string url = buildUrlFromSettings(DataRequest);
// Send request
DebugOnly.Print("Requesting user list to server...");
Remote.Result result = Remote.Get(url);
// Parse response
if (result.Success)
{
ArrayList tempUserList = new ArrayList();
if (Json.ParseNamedArray(UserHeader, result.Content, tempUserList, typeof(User)))
{
// Copy content to main list
// NOTE: CopyFrom clears list automatically
userList.CopyFrom(tempUserList);
// Store cache copy
CacheManager.Store(userList, CacheManager.UsersCacheFile);
DebugOnly.Print(userList.Count + " users received from server");
}
else
{
DebugOnly.Print("ERROR: User list request failed!");
}
}
// Return result of the operation
return(result.Success);
}
public static Result Post(string url, string body)
{
var request = WebRequest.Create(url) as HttpWebRequest;
var requestByteArray = Encoding.UTF8.GetBytes(body);
DebugOnly.Print("Performing POST...");
DebugOnly.Print("\t\tURL: " + url);
DebugOnly.Print("\t\tBody: " + body);
try
{
// Send the request
if (request != null)
{
request.Method = "POST";
request.ContentType = "application/json; charset=utf-8";
request.ContentLength = requestByteArray.Length;
var postStream = request.GetRequestStream();
postStream.Write(requestByteArray, 0, requestByteArray.Length);
postStream.Close();
// Grab the response
using (var response = request.GetResponse() as HttpWebResponse)
{
var responseString = string.Empty;
// Error
if (response == null || response.StatusCode != HttpStatusCode.OK)
{
DebugOnly.Print("ERROR: request failed. Received HTTP " + response.StatusCode);
return(new Result(false, null));
}
// Grab the response
using (var responseStream = response.GetResponseStream())
{
if (responseStream != null)
{
using (var reader = new StreamReader(responseStream))
{
responseString = reader.ReadToEnd();
}
DebugOnly.Print("\t\tResponse: " + responseString);
return(new Result(true, responseString));
}
}
}
}
}
catch (Exception e)
{
DebugOnly.Print("ERROR: Exception while performing POST: " + e);
return(new Result(false, null));
}
return(new Result(false, null));
}
// Network is online event
private static void NetworkUp(GTM.Module.NetworkModule sender, GTM.Module.NetworkModule.NetworkState state)
{
DebugOnly.Print("Network is up!");
// Start ServerRoutine
startRoutine();
}
/*
* NFC ERROR EVENT:
* This event occurs when the nfc module is not responding to commands.
*/
private void NfcError()
{
DebugOnly.Print("NFC Module is not responding!");
Log log = new Log(Log.TypeError, "NFC Module is not responding!");
DataHelper.AddLog(log);
}
// Sends log to server
private static bool sendLogs()
{
// Create JSON String
var jsonString = Json.BuildNamedArray(LogHeader, logList);
// Create URL
string url = buildUrlFromSettings(DataRequest);
// Send request
DebugOnly.Print("Sending logs to server...");
Remote.Result result = Remote.Post(url, jsonString);
if (result.Success)
{
DebugOnly.Print("Logs sent to server");
// Log list sent to server successfully: delete loglist
logList.Clear();
CacheManager.Store(logList, CacheManager.LogsCacheFile);
}
else
{
DebugOnly.Print("ERROR: Log sending failed!");
}
// Return result of the operation
return(result.Success);
}
private static bool FileExists(string file)
{
// Check if file exists
String root;
String[] foundFiles;
try
{
root = sdCard.StorageDevice.RootDirectory;
foundFiles = sdCard.StorageDevice.ListFiles(root);
}
catch (Exception)
{
return(false);
}
var exist = false;
foreach (var aFile in foundFiles)
{
if (string.Compare(file, aFile) == 0)
{
exist = true;
break;
}
}
if (!exist)
{
DebugOnly.Print("File \"" + file + "\" not found!");
}
return(exist);
}
/*
* TAG FOUND EVENT:
* This event occurs when the user passes a NFC card near the reader.
* It checks if the UID is valid and unlock the door if so.
*/
private void TagFound(string uid)
{
if (!scanWindow.IsShowing())
{
// Check authorization
var authorized = DataHelper.CheckCardId(uid);
// Show access window
accessWindow.Show(authorized);
// Log the event
string logText;
Log log;
if (authorized)
{
// Access granted
UnlockDoor();
logText = "Card \"" + uid + "\" inserted. Authorized access.";
log = new Log(Log.TypeAccess, null, uid, logText);
}
else
{
// Access denied
logText = "Card \"" + uid + "\" inserted. Access denied!";
log = new Log(Log.TypeInfo, logText);
}
DebugOnly.Print(logText);
// Add log to loglist
DataHelper.AddLog(log);
}
else
{
// Log new cardID
var newCardIdLog = new Log(
Log.TypeAccess,
pendingPin,
uid,
"Card \"" + uid + "\" has been added for pin \"" + pendingPin + "\".");
// Update CardID in userList
DataHelper.AddCardId(pendingPin, uid);
// Send urgent log
DataHelper.AddLog(newCardIdLog, true);
var cardAddedAlert = new AlertWindow(WindowAlertPeriod);
cardAddedAlert.SetText("NFC card added!");
cardAddedAlert.SetPositiveButton("Ok", delegate { cardAddedAlert.Dismiss(); });
cardAddedAlert.Show();
DebugOnly.Print("Card added to user with pin \"" + pendingPin + "\"");
}
}
public static string Get(int id)
{
if (id < settingArray.Count)
{
return(settingArray[id] as string);
}
else
{
DebugOnly.Print("ERROR: Setting id out of bounds!");
return(string.Empty);
}
}
public static bool Load(ArrayList list, string file)
{
// Init SD card
if (!MountCheck())
{
return(false);
}
// Check if file exist
if (!FileExists(file))
{
return(false);
}
byte[] data;
try
{
var f = sdCard.StorageDevice.OpenRead(file);
// If the file is empty do not parse
if (f.Length == 0)
{
DebugOnly.Print("ERROR: File \"" + file + "\" is empty!");
return(false);
}
data = new byte[f.Length];
f.Read(data, 0, data.Length);
f.Close();
VolumeInfo.GetVolumes()[0].FlushAll();
}
catch (Exception e)
{
DebugOnly.Print("ERROR: Exception while reading \"" + file + "\": " + e);
return(false);
}
try
{
var temp = (ArrayList)Reflection.Deserialize(data, typeof(ArrayList));
list.CopyFrom(temp);
}
catch (Exception e)
{
DebugOnly.Print("ERROR: Exception while deserializing \"" + file + "\": " + e);
return(false);
}
DebugOnly.Print("File \"" + file + "\" successfully loaded into object");
return(true);
}
private static bool MountCheck()
{
if (!sdCard.IsCardInserted)
{
DebugOnly.Print("ERROR: SD slot is empty!");
if (!slotErrorFlag)
{
// First slot error, send it
if (DataHelper.IsInitialized())
{
slotErrorFlag = true; // Leave it here, otherwise it's recursive!!!
DataHelper.AddLog(new Log(Log.TypeError, "SD Card slot is empty!"));
}
}
return(false);
}
if (!sdCard.IsCardMounted)
{
DebugOnly.Print("SD Card appears to be unmounted! Mounting...");
for (int i = 0; i < mountAttempts; i++)
{
if (sdCard.IsCardMounted)
{
return(true);
}
if (sdCard.Mount())
{
return(true);
}
System.Threading.Thread.Sleep(mountAttemptPeriod);
}
// Mounting error
DebugOnly.Print("ERROR: Mounting failed!");
if (!mountErrorFlag)
{
// First mount error, send it
if (DataHelper.IsInitialized())
{
DataHelper.AddLog(new Log(Log.TypeError, "Unable to mount SDcard!"));
mountErrorFlag = true;
}
}
return(false);
}
slotErrorFlag = false;
mountErrorFlag = false;
return(true);
}
public static bool Set(int id, string content)
{
if (id < settingArray.Count)
{
settingArray[id] = content;
return(CacheManager.Store(settingArray, CacheManager.SettingsFile));
}
else
{
DebugOnly.Print("ERROR: Setting id out of bounds!");
return(false);
}
}
public void ProgramStarted()
{
DebugOnly.Print("Program started!");
// Initialize screen
WindowManager.Init();
// Set scan window
scanWindow.SetText("Please scan your NFC card now...");
scanWindow.SetNegativeButton("Cancel", delegate { scanWindow.Dismiss(); });
// Windows and window manager
pinWindow.Id = WindowPinId;
scanWindow.Id = WindowScanId;
// Button
button.ButtonPressed += DoorOpen;
button.ButtonReleased += DoorClosed;
doorOpen = button.Pressed;
if (doorOpen)
{
pinWindow.SetText("Door open");
}
else
{
pinWindow.SetText("Door closed");
}
unlockedTimer = new GT.Timer(unlockPeriod);
unlockedTimer.Tick += UnlockTimeout;
pinWindow.Show();
// Event Setup
adafruit_PN532.TagFound += TagFound;
adafruit_PN532.Error += NfcError;
pinWindow.PinFound += PinFound;
DataHelper.DataSourceChanged += DataSourceChanged;
WindowManager.WindowChanged += WindowChanged;
// Start NFC
adafruit_PN532.StartScan(NfcScanPeriod, NfcScanTimeout);
//Init
CacheManager.Init(sdCard);
SettingsManager.Init();
DataHelper.Init(ethernetJ11D);
adafruit_PN532.Init();
}
public static bool Store(ArrayList list, string file)
{
// Init SD card
if (!MountCheck())
{
return(false);
}
FileExists(file);
byte[] data;
try
{
// Serialize data
data = Reflection.Serialize(list, typeof(ArrayList));
// This shouldn't happen, just in case...
if (data.Length == 0)
{
DebugOnly.Print("ERROR: Serialized data \"" + file + "\" is null!");
return(false);
}
}
catch (Exception e)
{
DebugOnly.Print("ERROR: Exception while serializing \"" + file + "\": " + e);
return(false);
}
try
{
// Write data
var f = sdCard.StorageDevice.OpenWrite(file);
f.Write(data, 0, data.Length);
f.Close();
VolumeInfo.GetVolumes()[0].FlushAll();
}
catch (Exception e)
{
DebugOnly.Print("ERROR: Exception while writing \"" + file + "\": " + e);
return(false);
}
DebugOnly.Print("Object successfully stored into \"" + file + "\" file");
return(true);
}
public static void Init(EthernetJ11D _ethernetJ11D)
{
// Load ip from settings
String gadgeteerIp = SettingsManager.Get(SettingsManager.LockIp);
ethernetJ11D = _ethernetJ11D;
ethernetJ11D.UseThisNetworkInterface();
ethernetJ11D.UseStaticIP(gadgeteerIp, "255.255.255.0", "192.168.100.1");
ethernetJ11D.NetworkUp += NetworkUp;
ethernetJ11D.NetworkDown += NetworkDown;
// Data is not yet loaded, data source is unknown
ChangeDataSource(DataSourceUnknown);
// Load users from cache
if (CacheManager.Load(userList, CacheManager.UsersCacheFile))
{
DebugOnly.Print(userList.Count + " users loaded from cache!");
// Data source is now cache
ChangeDataSource(DataSourceCache);
}
else
{
// Empty data cache is assumed as an error!
if (DataSourceChanged != null)
{
DataSourceChanged(DataSourceError);
}
// Clear user list
userList.Clear();
}
// Load logs from cache if any
if (CacheManager.Load(logList, CacheManager.LogsCacheFile))
{
DebugOnly.Print(logList.Count + " logs loaded from cache!");
}
else
{
// Clear log list
logList.Clear();
}
initialized = true;
}
// Network is offline event
private static void NetworkDown(GTM.Module.NetworkModule sender, GTM.Module.NetworkModule.NetworkState state)
{
DebugOnly.Print("Network is down!");
// Data source is now cache
if (userList.Count > 0)
{
ChangeDataSource(DataSourceCache);
}
else
{
ChangeDataSource(DataSourceError);
}
// Stop ServerRoutine
stopRoutine();
}
private void UnlockTimeout(GT.Timer timerAccessWindow)
{
if (unlockTimerRunning)
{
authorizedAccess = false;
// Stop timer
unlockTimerRunning = false;
unlockedTimer.Stop();
// New pending unlock error
pendingUnlockError = true;
// Send log
DebugOnly.Print("Unlock timeout! Door is not closed!!!");
DataHelper.AddLog(new Log(Log.TypeError, "Unlock timeout! Door is not closed!!!"));
}
}
private void DoorOpen(Button sender, Button.ButtonState state)
{
doorOpen = true;
pinWindow.SetText("Door open");
DebugOnly.Print("Door open!");
if (!authorizedAccess)
{
// Security breach
DebugOnly.Print("Security breach! Unauthorized access!");
DataHelper.AddLog(new Log(Log.TypeError, "Security breach! Unauthorized access!"));
var breachWindow = new AlertWindow(20000);
breachWindow.SetText("BREACH ALERT!!! \n UNAUTHORIZED ACCESS!!! \n\n\n\n Please contact the administrator immediately.");
breachWindow.Show();
}
}
private void DoorClosed(Button sender, Button.ButtonState state)
{
authorizedAccess = false;
doorOpen = false;
pinWindow.SetText("Door closed");
DebugOnly.Print("Door closed!");
// Stop timer
unlockTimerRunning = false;
unlockedTimer.Stop();
// Log if there is a pending error
if (pendingUnlockError)
{
pendingUnlockError = false;
DebugOnly.Print("Door finally closed");
DataHelper.AddLog(new Log(Log.TypeError, "Door finally closed"));
}
}
// Request current timestamp
public static Result Get(string url)
{
DebugOnly.Print("Performing GET...");
DebugOnly.Print("\t\tURL: " + url);
string responseString = null;
var request = WebRequest.Create(url) as HttpWebRequest;
try
{
if (request != null)
{
using (var response = request.GetResponse() as HttpWebResponse)
{
// Error
if (response == null || response.StatusCode != HttpStatusCode.OK)
{
DebugOnly.Print("ERROR: request failed. Received HTTP " + response.StatusCode);
return(new Result(false, null));
}
var responseStream = response.GetResponseStream();
var responseReader = new StreamReader(responseStream);
responseString = responseReader.ReadToEnd();
responseStream.Close();
responseReader.Close();
DebugOnly.Print("\t\tResponse: " + responseString);
return(new Result(true, responseString));
}
}
}
catch (Exception e)
{
DebugOnly.Print("ERROR: Exception while performing GET: " + e);
}
return(new Result(false, null));
}
// Get current time from server
private static bool requestTime()
{
string url = buildUrlFromSettings(TimeRequest);
Remote.Result result = Remote.Get(url);
if (result.Success)
{
// Request current time
DebugOnly.Print("Requesting current time to server...");
DateTime serverDt = result.Content.ToDateTime();
DateTime rtcDt = Utils.SafeRtc();
if (!serverDt.WeakCompare(rtcDt))
{
// Found time mismatch
DebugOnly.Print("ERROR: RTC/Server time mismatch! Server: " + serverDt.ToMyString() + ", RTC: " + rtcDt.ToMyString());
DebugOnly.Print("Setting RTC...");
Log log = new Log(Log.TypeInfo, "RTC/Server time mismatch! Server: " + serverDt.ToMyString() + ", RTC: " + rtcDt.ToMyString());
AddLog(log);
RealTimeClock.SetDateTime(serverDt);
}
else
{
DebugOnly.Print("RTC already synced with server time!");
}
// RTC time is now valid
timeChecked = true;
return(true);
}
return(false);
}
public static bool ParseNamedArray(string arrayName, string jsonStr, ArrayList list, Type objType)
{
var initHash = JsonSerializer.DeserializeString(jsonStr) as Hashtable;
if (initHash == null)
{
DebugOnly.Print("ERROR: Not JSON!");
return(false);
}
var hashList = (ArrayList)initHash[arrayName];
if (hashList == null)
{
DebugOnly.Print("ERROR: JSON doesn't contain array \"" + arrayName + "\"!");
return(false);
}
try
{
foreach (Hashtable hash in hashList)
{
var methods = objType.GetMethods();
// Construct new object of type objType
var constructorInfo = objType.GetConstructor(new Type[0]);
if (constructorInfo != null)
{
var obj = constructorInfo.Invoke(new object[0]);
foreach (var method in methods)
{
var methodName = method.Name;
if (methodName.Length > 5)
{
var prefix = methodName.Substring(0, 4);
if (string.Compare(prefix, "set_") == 0)
{
// Is a setter
var fieldName = methodName.Substring(4);
var objFromHash = hash[fieldName];
if (objFromHash != null)
{
method.Invoke(obj, new[] { objFromHash });
}
}
}
}
list.Add(obj);
}
}
}
catch (Exception e)
{
DebugOnly.Print("ERROR: exception while parsing JSON list: " + e);
return(false);
}
return(true);
}
/*
* PIN FOUND EVENT:
* This event occurs when the user inserts a pin code. It checks if the pin is valid and unlock the door if so.
* If the pin has no related CardId it prompts the user to add it.
*/
private void PinFound(string pin)
{
string masterPin = SettingsManager.Get(SettingsManager.MasterPin);
// Check master pin
if (String.Compare(masterPin, pin) == 0)
{
maintenanceWindow.Show();
return;
}
// Check authorization
var authorized = DataHelper.CheckPin(pin);
var nullCardId = DataHelper.PinHasNullCardId(pin);
// Log the event
string logText;
Log log;
if (authorized)
{
// Access granted
UnlockDoor();
logText = "Pin \"" + pin + "\" inserted. Authorized access.";
log = new Log(Log.TypeAccess, pin, logText);
}
else
{
// Access denied
logText = "Pin \"" + pin + "\" inserted. Access denied!";
log = new Log(Log.TypeInfo, logText);
}
DebugOnly.Print(logText);
// Add log to loglist
DataHelper.AddLog(log);
if (nullCardId && authorized)
{
// Null CardID detected, prompt the user to set one
var nullCardIdAlert = new AlertWindow(WindowAlertPeriod);
nullCardIdAlert.SetText(
"It happears that this user has no related NFC card.\nDo you want to scan it now?");
nullCardIdAlert.SetPositiveButton("Yes", delegate
{
// User wants to add a new NFC card
pendingPin = pin;
scanWindow.Show();
});
nullCardIdAlert.SetNegativeButton("No", delegate
{
// User doesn't want to add a new NFC card
nullCardIdAlert.Dismiss();
});
nullCardIdAlert.Show();
}
else
{
// Everything is fine
accessWindow.Show(authorized);
}
}
/*
* SERVER ROUTINE:
* ServerRoutine is the only thread of this class. It periodically updates the current user data, and
* if logs are stored into logList, it sends the logs to the server.
*/
private static void ServerRoutine()
{
while (threadRunning)
{
bool success = true;
if (ethernetJ11D.IsNetworkUp)
{
ChangeDataSource(DataSourceRefresh);
DebugOnly.Print("Beginning server routine...");
// Check if ip is valid
if (String.Compare(ethernetJ11D.NetworkSettings.IPAddress, "0.0.0.0") != 0)
{
DebugOnly.Print("My IP is: " + ethernetJ11D.NetworkSettings.IPAddress);
}
else
{
DebugOnly.Print("ERROR: Current IP appears to be null!");
success = false;
}
// Request current time
if (success && !timeChecked)
{
success = requestTime();
}
// Send logs
if (success && logList.Count > 0)
{
DebugOnly.Print(logList.Count + " stored logs must be sent to server!");
success = sendLogs();
}
// Request users
if (success)
{
success = requestUsers();
}
}
else
{
success = false;
DebugOnly.Print("ERROR: No connection, skipping scheduled server polling routine.");
}
// Plan next routine
string periodString;
int period;
if (success)
{
periodString = SettingsManager.Get(SettingsManager.RoutinePeriod);
period = Int32.Parse(periodString);
DebugOnly.Print("Server routine completed! Next event in " + periodString);
ChangeDataSource(DataSourceRemote);
}
else
{
periodString = SettingsManager.Get(SettingsManager.RetryPeriod);
period = Int32.Parse(periodString);
DebugOnly.Print("Server routine failed! Next event in " + periodString);
// Data source is now cache
if (userList.Count > 0)
{
ChangeDataSource(DataSourceCache);
}
else
{
ChangeDataSource(DataSourceError);
}
}
threadWaitForStop.WaitOne(period, true);
threadWaitForStop.Reset();
}
}
