public async Task GetCapacity_Should_ReturnValidCapacity(CourseInfo course)
{
CourseCapacity capacity = await requests.GetCapacity(course);
capacity.CurrentCapacity.Should().BeGreaterOrEqualTo(0);
capacity.TotalCapacity.Should().BeGreaterThan(0);
}
// This method is called for each NotificationRequests on each iteration of the polling loop.
// It checks the capacity of the course in the request, and notifies the user if space is found.
public async Task NotifyIfSpaceFound(NotificationRequest notificationRequest,
SynchronizedCollection <NotificationRequest> notificationRequests)
{
// Fetch and log the capacity for the course.
CourseCapacity capacity = await requests.GetCapacity(notificationRequest.RequestedCourse);
logger.LogInformation($"Capacity for {notificationRequest.RequestedCourse.Term}|{notificationRequest.RequestedCourse.Subject}|{notificationRequest.RequestedCourse.Code}|{notificationRequest.RequestedCourse.Section} is {capacity.CurrentCapacity}");
// If we find capacity in the course, notify the user using their supplied contact method(s), logging any errors.
if (capacity.CurrentCapacity > 0)
{
if (alertContact.SendNotification(notificationRequest))
{
logger.LogInformation($"Space found in course {notificationRequest.RequestedCourse.Subject} {notificationRequest.RequestedCourse.Code} for user: {notificationRequest.Email} | {notificationRequest.Phone}");
// Remove the NotificationRequest from the in-memory collection, and repository.
notificationRequests.Remove(notificationRequest);
if (!repository.RemoveRequest(notificationRequest))
{
logger.LogError($"Did not remove request from db: {notificationRequest.Email}|{notificationRequest.Phone}|{notificationRequest.RequestedCourse.Term}|{notificationRequest.RequestedCourse.Subject}|{notificationRequest.RequestedCourse.Code}|{notificationRequest.RequestedCourse.Section}");
}
}
else
{
logger.LogError($"Failed to send notification to user: {notificationRequest.Email}|{notificationRequest.Phone}|{notificationRequest.RequestedCourse.Term}|{notificationRequest.RequestedCourse.Subject}|{notificationRequest.RequestedCourse.Code}|{notificationRequest.RequestedCourse.Section}");
}
}
}
// This method will get the capacity of the input course.
// This method makes a series of HTTP requests to gain authorization, then get the required course info.
public async Task <CourseCapacity> GetCapacity(CourseInfo course)
{
try
{
HttpRequestMessage request = requestsHelper.CreateHttpRequestMessage(HttpMethod.Get, Constants.WebAdvisorInitialConnectionUrl);
HttpResponseMessage response = await httpClient.SendAsync(request);
string token = requestsHelper.GetTokenFromResponse(response);
request = requestsHelper.CreateHttpRequestMessage(HttpMethod.Get, Constants.WebAdvisorInitialConnectionUrl + token);
response = await httpClient.SendAsync(request);
token = requestsHelper.GetTokenFromResponse(response);
string postUrl = requestsHelper.CreatePostUrl(token);
request = requestsHelper.CreateHttpRequestMessage(HttpMethod.Post, postUrl);
request.Content = requestsHelper.CreateFormData(course);
response = await httpClient.SendAsync(request);
string responseHtml = await response.Content.ReadAsStringAsync();
HtmlDocument htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(responseHtml);
HtmlNode capacityNode = htmlDoc.GetElementbyId(Constants.CapacityNodeID);
CourseCapacity capacity = requestsHelper.GetCourseCapacity(capacityNode);
return(capacity);
}
catch (Exception e)
{
logger.LogInformation($"An exception occured in GetCapacity request: {e.Message}");
throw;
}
}
