public static void InsertAfterLastFotaCommand(IFoteable device, string commands)
{
var file = ObtainFirstExistantReversedFile(device);
if (file == null)
{
EnqueuePrivate(device, 0, commands, ".txR");
return;
}
using (var sr = new BackwardReader(file))
{
String line;
if ((line = sr.ReadLine()) != null)
{
while (line != null && IsLastSequenceMessage(line))
{
line = sr.ReadLine();
}
if (line != null)
{
if (!commands.EndsWith(Environment.NewLine))
{
commands += Environment.NewLine;
}
sr.Write(commands);
sr.Write(line + Environment.NewLine);
}
if (device.Sequence != null)
{
sr.Write(LastSequenceFactory(device));
}
}
sr.TruncateHere();
}
}
private static void EnqueuePrivate(IFoteable device, ulong messageId, String commands, String ext)
{
try
{
if (!commands.EndsWith(Environment.NewLine))
{
commands += Environment.NewLine;
}
var file = GetFilePath(device, ext);
var fexists = IOUtils.FileExists(file);
if (fexists)
{
using (var sr = new BackwardReader(file))
{
String line;
if ((line = sr.ReadLine()) != null)
{
while (line != null && IsLastSequenceMessage(line))
{
line = sr.ReadLine();
}
if (line != null)
{
sr.Write(line + Environment.NewLine);
}
sr.Write(commands);
if (messageId != 0)
{
sr.Write(VirtualMessageFactory(MessageIdentifier.AckEvent, messageId));
}
if (device.Sequence != null)
{
sr.Write(LastSequenceFactory(device));
}
sr.TruncateHere();
}
}
}
else
{
using (var sw = new StreamWriter(file, true))
{
sw.Write(commands);
if (messageId != 0)
{
sw.WriteLine(VirtualMessageFactory(MessageIdentifier.AckEvent, messageId));
}
if (device.Sequence != null)
{
sw.Write(LastSequenceFactory(device));
}
sw.Close();
}
}
}
catch (Exception e)
{
STrace.Exception(typeof(Fota).FullName, e, device.Id);
}
}
public static BaseDeviceCommand UpdateFotaCommand(IFoteable device, ulong?msgid, string newStatus, BaseDeviceCommand newCommand, UpdateFotaCommands action)
{
var result = (BaseDeviceCommand)null;
var file = ObtainFirstExistantReversedFile(device);
if (file == null)
{
return(null);
}
using (var sr = new BackwardReader(file))
{
var buffer = new StringBuilder();
var msgidfound = false;
String line;
while ((line = sr.ReadLine()) != null) // reads the lines from last to first
{
var lineOriginal = line = line.Trim();
if (IsLastSequenceMessage(line))
{
continue;
}
if (IsVirtualMessage(line))
{
break;
}
var newLine = new StringBuilder();
var isFirstCommand = true; // at begin of line evaluation, the next command in line is the first
MatchCollection commandMatches = getMatchesAllCommandsFrom(line);
var allSent = commandMatches.Count > 0; // the variable reflects if all commands in line were sent.
for (var i = 0; i < commandMatches.Count; i++)
{
var cM = commandMatches[i];
var command = cM.Groups[0].Value;
var dc = BaseDeviceCommand.createFrom(command, device, null);
if (!dc.isAlreadySent())
{
if (msgid == null || dc.MessageId == msgid)
{
allSent = allSent && (action != UpdateFotaCommands.RollbackTransaction && isFirstCommand && newStatus == BaseDeviceCommand.Attributes.Status_Sent);
msgidfound = true;
if (isFirstCommand)
{
isFirstCommand = false;
if (newCommand != null)
{
dc = newCommand;
dc.IdNum = device.GetDeviceId();
}
if (action == UpdateFotaCommands.UpdateTries || action == UpdateFotaCommands.RollbackTransaction)
{
dc.Tries = (dc.Tries == null ? 0 : dc.Tries.Value) + 1;
dc.LastTry = DateTime.Now;
}
if (action == UpdateFotaCommands.RollbackTransaction)
{
dc.setStatus(BaseDeviceCommand.Attributes.Status_Rollbacked);
}
else
{
dc.setStatus(newStatus);
}
}
else if (action == UpdateFotaCommands.RollbackTransaction)
{
dc.Tries = (dc.Tries == null ? 0 : dc.Tries.Value) + 1;
dc.LastTry = DateTime.Now;
dc.setStatus(BaseDeviceCommand.Attributes.Status_Rollbacked);
}
if (result == null) // just catch first not sent message
{
result = dc;
}
}
else
{
allSent = false;
}
}
newLine.Append(dc.ToString());
}
line = (allSent?null:newLine.ToString());
if (!String.IsNullOrEmpty(line))
{
if (lineOriginal != line)
{
STrace.Debug(typeof(Fota).FullName, device.Id, "FOTA> LINE ORIGINAL: " + lineOriginal);
STrace.Debug(typeof(Fota).FullName, device.Id, "FOTA> LINE REPLACED: " + line);
}
buffer.Insert(0, line + Environment.NewLine);
}
else
{
STrace.Debug(typeof(Fota).FullName, device.Id, "FOTA> LINE DELETED : " + lineOriginal);
}
if (msgidfound)
{
break;
}
}
if (buffer.Length != 0)
{
sr.Write(buffer.ToString());
}
if (device.Sequence != null)
{
sr.Write(LastSequenceFactory(device));
}
sr.TruncateHere();
}
if (IOUtils.FileExists(file))
{
using (var sr = new BackwardReader(file))
{
var allLastSequence = true;
String line;
while (allLastSequence && (line = sr.ReadLine()) != null)
{
allLastSequence = allLastSequence && IsLastSequenceMessage(line);
}
sr.Dispose();
if (allLastSequence)
{
File.Delete(file);
}
}
}
return(result);
}