public CourseResultModel CreateCourseFromHtml(IEnumerable <IElement> html, CourseModel c)
{
string[] courseInfo = html.ElementAt(0).TextContent.Split(" - ");
string creditHours = html.ElementAt(1).TextContent.Split('\n').Where(s => s.Contains("Credits")).ElementAt(0).Trim().Remove(5);
IElement[] courseDetailsElements = html.ElementAt(1).GetElementsByTagName("tr").Skip(1).ToArray();
List <string> times = new List <string>();
List <string> inst = new List <string>();
List <string> days = new List <string>();
List <string> locations = new List <string>();
for (int i = 0; i < courseDetailsElements.Length; i++)
{
string[] crseDetails = courseDetailsElements.ElementAt(i).TextContent.Split('\n');
times.Add(crseDetails[2]);
if (crseDetails[2] == " ")
{
crseDetails[2] = "N/A";
}
days.Add(crseDetails[3]);
locations.Add(crseDetails[4]);
inst.Add(crseDetails[7].Replace("(P)", ""));
}
var courseResult = new CourseResultModel(c);
if (courseInfo[0].Contains(':'))
{
var fullTitle = courseInfo[0].Trim('\n', ' ').Split(":");
courseResult.Topic = fullTitle[1].Trim();
}
courseResult.CourseRegistrationNum = courseInfo[1].Trim();
courseResult.Section = courseInfo[3].Trim();
courseResult.Instructor = inst.Select(x => x.Trim()).FirstOrDefault();
courseResult.CreditHours = creditHours;
courseResult.Meetings = ParseCourseMeetingInformation(days, locations, times);
return(courseResult);
}
private async Task <CourseResultList> GetCourses(CourseModel courseModel, string termId)
{
CourseResultList courseRes = new CourseResultList(courseModel);
//Check for cache, it if exists...just get current seat count.
string cacheId = $"{termId}.{courseModel.SubjectCode}{courseModel.CourseNumber}";
if (this.CachedCourses.TryGetValue <CourseResultList>(cacheId, out _))
{
courseRes = this.CachedCourses.Get <CourseResultList>(cacheId);
for (int i = 0; i < courseRes.Results.Count; i++)
{
(int remainingSeats, int remainingWaitlist)seatData = await GetSeatCapacities(courseRes.Results[i].CourseRegistrationNum, termId);
courseRes.Results[i].RemainingSeats = seatData.remainingSeats;
courseRes.Results[i].RemainingWaitlist = seatData.remainingWaitlist;
}
return(courseRes);
}
List <KeyValuePair <string, string> > values = BannerQueryValues.GetKeyValues(termId, courseModel.SubjectCode, courseModel.CourseNumber);
HttpContent content = new FormUrlEncodedContent(values);
HttpResponseMessage result = await this.Client.PostAsync("bwckschd.p_get_crse_unsec", content);
var html = await result.Content.ReadAsStringAsync();
var htmlDoc = await BrowsingContext.New(Configuration.Default.WithXPath()).OpenAsync(req => req.Content(html));
if (result.IsSuccessStatusCode)
{
try
{
var trows = htmlDoc.QuerySelectorAll("*[xpath>'/body/div[3]/table[1]/tbody/tr']").ToList();
for (int i = 0; i < trows.Count(); i += 2)
{
//Collecting and Parsing all the data required to make a CourseResult object
var courseRows = trows.Skip(i).Take(2);
CourseResultModel courseResult = this.CourseResultModelFactory.CreateCourseFromHtml(courseRows, courseModel);
(int remainingSeats, int remainingWaitlist)seatData = await GetSeatCapacities(courseResult.CourseRegistrationNum, termId);
courseResult.RemainingSeats = seatData.remainingSeats;
courseResult.RemainingWaitlist = seatData.remainingWaitlist;
courseRes.Results.Add(courseResult);
}
courseRes.Results.OrderByDescending(x => x.RemainingSeats).ThenBy(x => x.Section).ToList();
this.CachedCourses.Set(cacheId, courseRes, TimeSpan.FromDays(15));
}
catch
{
Logger.LogInformation($"Match not found for {courseModel.SubjectCode} {courseModel.CourseNumber}.");
this.CachedCourses.Set(cacheId, courseRes, TimeSpan.FromDays(15));
}
}
else
{
Logger.LogWarning($"Banner responded with a {result.StatusCode} while searching for {courseModel.SubjectCode} {courseModel.CourseNumber}.");
}
return(courseRes);
}
