private void DoReloadCourses(string url)
{
try
{
_showCalendarViewerAfterReload = false;
UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Connecting to Server (Checking for Changes)");
//
// Check for Changes
//
// make HTTP request
WebRequest request = WebRequest.Create(url);
request.Proxy = null;
// use HEAD to determine chnages
request.Method = "HEAD";
// get response
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
long contentLength = response.ContentLength;
DateTime lastChange = response.LastModified;
// check for changes
// (it seems the FHV timetable service generates the timetables
// on-the-fly and always returns the current date as "LastModified"
// this makes caching impossible, but we are prepared!)
if (_dataService.CalendarLastDownload >= lastChange)
{
return;
}
//
// Download the calendar
//
// We need to load the file
UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Connecting to Server (Download)");
request = WebRequest.Create(url);
request.Proxy = null;
// get response
response = (HttpWebResponse)request.GetResponse();
// get stream for reading
ByteCountingStream remoteStream = new ByteCountingStream(response.GetResponseStream());
Encoding encoding = Encoding.UTF8;
StreamReader reader = new StreamReader(remoteStream, encoding);
// create parser
UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Setup default data");
FhvICalParser parser = new FhvICalParser(_dataService);
parser.Prepare();
// load data
UpdateProgress(
contentLength == -1 ? TaskbarItemProgressState.Indeterminate : TaskbarItemProgressState.Normal, 0,
"Reload courses from event");
string line;
while ((line = reader.ReadLine()) != null)
{
if (contentLength != -1)
{
double percentage = remoteStream.ReadByteCount / (double)contentLength;
if (percentage > 1)
{
UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Reload courses from event");
}
else
{
UpdateProgress(percentage);
}
}
parser.ProcessLine(line);
}
// store everything in the new database
UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Saving data to local storage");
if(_dataService.ResetDatabase(parser.ParsedData))
{
// update settings for next download
_dataService.CalendarFileSize = remoteStream.ReadByteCount;
_dataService.CalendarLastDownload = lastChange;
}
else
{
DownloadError("Could not save loaded data in the local storage");
}
//#region Debug Code
//StringBuilder builder = new StringBuilder();
//foreach (var wing in parser.ParsedData)
//{
// builder.AppendLine(wing.Name);
// foreach (var level in wing.Level)
// {
// builder.AppendLine(" " + level.Name);
// foreach (var room in level.Room)
// {
// builder.AppendLine(" " + room.RoomId);
// foreach (var course in room.Course)
// {
// builder.AppendLine(string.Format(" {0}({1} - {2})", course.Module, course.StartTime, course.EndTime));
// }
// }
// }
//}
//DispatcherHelper.UIDispatcher.BeginInvoke(new Action(
// () =>
// {
// DebugOutput = builder.ToString();
// }));
//#endregion
}
catch (Exception e)
{
DownloadError(e.Message);
Debug.Fail(e.Message, e.ToString());
}
finally
{
UpdateProgress(TaskbarItemProgressState.None, 0, "Ready");
// We have a lot of unneeded objects in our memory. let the GC get rid of them
GC.Collect();
}
}
private void DoReloadCourses(string url)
{
try
{
_showCalendarViewerAfterReload = false;
_progressViewModel.UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Connecting to Server (Checking for Changes)");
//
// Check for Changes
//
// make HTTP request
WebRequest request = WebRequest.Create(url);
request.Proxy = null;
// use HEAD to determine chnages
request.Method = "HEAD";
// get response
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
long contentLength = response.ContentLength;
DateTime lastChange = response.LastModified;
// check for changes
// (it seems the FHV timetable service generates the timetables
// on-the-fly and always returns the current date as "LastModified"
// this makes caching impossible, but we are prepared!)
if (_dataService.CalendarLastDownload >= lastChange)
{
return;
}
//
// Download the calendar
//
// We need to load the file
_progressViewModel.UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Connecting to Server (Download)");
request = WebRequest.Create(url);
request.Proxy = null;
// get response
response = (HttpWebResponse)request.GetResponse();
// get stream for reading
ByteCountingStream remoteStream = new ByteCountingStream(response.GetResponseStream());
Encoding encoding = Encoding.UTF8;
StreamReader reader = new StreamReader(remoteStream, encoding);
// create parser
_progressViewModel.UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Setup default data");
FhvICalParser parser = new FhvICalParser(_dataService);
parser.Prepare();
// load data
_progressViewModel.UpdateProgress(
contentLength == -1 ? TaskbarItemProgressState.Indeterminate : TaskbarItemProgressState.Normal, 0,
"Reload courses from event");
string line;
while ((line = reader.ReadLine()) != null)
{
if (contentLength != -1)
{
double percentage = remoteStream.ReadByteCount / (double)contentLength;
if (percentage > 1)
{
_progressViewModel.UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Reload courses from event");
}
else
{
_progressViewModel.UpdateProgress(percentage);
}
}
parser.ProcessLine(line);
}
// store everything in the new database
_progressViewModel.UpdateProgress(TaskbarItemProgressState.Indeterminate, 0, "Saving data to local storage");
if (_dataService.ResetDatabase(parser.ParsedData))
{
// update settings for next download
_dataService.CalendarFileSize = remoteStream.ReadByteCount;
_dataService.CalendarLastDownload = lastChange;
_progressViewModel.InvokeDataReloaded(EventArgs.Empty);
}
else
{
DownloadError("Could not save loaded data in the local storage");
}
}
catch (Exception e)
{
DownloadError(e.Message);
}
finally
{
_progressViewModel.UpdateProgress(TaskbarItemProgressState.None, 0, "Ready");
// We have a lot of unneeded objects in our memory. let the GC get rid of them
GC.Collect();
}
}