public AsyncTask LoadActivityStates(string studentId, IEnumerable <string> activityIds)
{
return(new AsyncTask((prevResult, onCompleted, onError) =>
{
try
{
Uri serverUri = new Uri(appSettings.ServerURI, UriKind.RelativeOrAbsolute);
Uri restUri = new Uri(serverUri, "rest/");
ActivityStateRepository repo = new ActivityStateRepository(restUri);
if (repo == null)
{
throw new Exception("ActivityStateRepository is not initialized.");
}
repo.GetActivityStates(studentId, activityIds, (ActivityStateRepository.Response response) =>
{
if (response.Success)
{
onCompleted(response.Items);
}
else
{
onError(new Exception(response.Error));
}
});
}
catch (Exception e)
{
onError(e);
}
}));
}
public AsyncTask SaveActivityState(ActivityState activityState)
{
Contract.ArgumentNotNull("activityState", activityState);
return(new AsyncTask((prevResult, onCompleted, onError) =>
{
try
{
Uri serverUri = new Uri(appSettings.ServerURI, UriKind.RelativeOrAbsolute);
Uri restUri = new Uri(serverUri, "rest/");
ActivityStateRepository repo = new ActivityStateRepository(restUri);
if (repo == null)
{
throw new Exception("ActivityStateRepository is not initialized.");
}
// Load ActivityState (if it exists)
repo.Update(activityState, (ActivityStateRepository.Response response) =>
{
try
{
if (response.Success)
{
onCompleted(response.Item);
}
else
{
onError(new Exception(response.Error));
}
}
catch (Exception e)
{
onError(e);
}
});
}
catch (Exception e)
{
onError(e);
}
}));
}
public AsyncTask LoadActivityState(string studentId, string activityId, bool createNewIfDoesNotExit = false)
{
return(new AsyncTask((prevResult, onCompleted, onError) =>
{
try
{
Uri serverUri = new Uri(appSettings.ServerURI, UriKind.RelativeOrAbsolute);
Uri restUri = new Uri(serverUri, "rest/");
ActivityStateRepository repo = new ActivityStateRepository(restUri);
if (repo == null)
{
throw new Exception("ActivityStateRepository is not initialized.");
}
// Load ActivityState (if it exists)
repo.GetActivityStates(studentId, new string[] { activityId }, (ActivityStateRepository.Response loadResponse) =>
{
try
{
if (loadResponse.Success)
{
if (loadResponse.Items != null && loadResponse.Items.Count > 0)
{
onCompleted(loadResponse.Items.OrderByDescending(s => s.ModifiedDate).First());
}
else
{
// Create ActivityState
ActivityState newState = new ActivityState()
{
ActivityId = activityId,
StudentId = studentId
};
repo.Insert(newState, (ActivityStateRepository.Response insertResponse) =>
{
if (insertResponse.Success)
{
onCompleted(insertResponse.Item);
}
else
{
onError(new Exception(insertResponse.Error));
}
});
}
}
else
{
onError(new Exception(loadResponse.Error));
}
}
catch (Exception e)
{
onError(e);
}
});
}
catch (Exception e)
{
onError(e);
}
}));
}