public static async Task <Course> GetCourse(string courseName, string termID)
{
Course ret;
URL url = new URL(courseName, termID);
var httpClient = new HttpClient();
string html = await httpClient.GetStringAsync(url);
var htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(html);
string fullName;
List <HtmlNode> divs = null;
divs = htmlDocument
.DocumentNode
.Descendants("div")
.Where(node => node.GetAttributeValue("id", "") == courseName)
.First()
.Descendants("div")
.Where(node => node.GetAttributeValue("class", "").Contains("section delivery"))
.ToList();
fullName = htmlDocument
.DocumentNode
.Descendants("span")
.Where(node => node.GetAttributeValue("class", "") == "course-title")
.First()
.InnerText;
List <Section> sections = new List <Section>();
// Enumerate through each section
foreach (var div in divs)
{
string name = div
.Descendants("input").First()
.ChildAttributes("value").First()
.Value;
var rows = div
.Descendants("div")
.Single(node => node.GetAttributeValue("class", "") == "class-days-container")
.Elements("div").ToList();
var span = div.Descendants("span");
var instructors = span
.Where(node => node.GetAttributeValue("class", "") == "section-instructor")
.Select(node => node.InnerText)
.ToList();
int openSeats = int.Parse(span
.Single(node => node.GetAttributeValue("class", "") == "open-seats-count")
.InnerText);
int waitlist = int.Parse(span
.Where(node => node.GetAttributeValue("class", "") == "waitlist-count")
.First()
.InnerText);
string instructor = instructors[0];
for (int i = 1; i < instructors.Count(); i++)
{
instructor += ", ";
instructor += instructors[i];
}
List <ClassSequence> classes = new List <ClassSequence>();
// Enumerate through each class of the section
foreach (var row in rows)
{
HtmlNode dayTimeGroup = row.Descendants("div").FirstOrDefault(n => n.Attributes["class"].Value.Contains("section-day-time-group"));
if (dayTimeGroup == null)
{
WarningHandler?.Invoke("Warning", "Some class times are inaccessible, please contact department or instructor for details");
break;
}
var enumerator = dayTimeGroup.Descendants("span").GetEnumerator();
if (!enumerator.MoveNext())
{
break;
}
if (enumerator.Current.GetAttributeValue("class", "") == "elms-class-message")
{
WarningHandler?.Invoke("Warning", "Part of the class times are only accessible through ELMS, which are skipped by the scheduler");
break;
}
var positions = row.Descendants("span");
string building = positions
.Where(node => node.GetAttributeValue("class", "") == "building-code")
.FirstOrDefault()?.InnerText ?? string.Empty;
string room = positions
.Where(node => node.GetAttributeValue("class", "") == "class-room")
.FirstOrDefault()?.InnerText ?? string.Empty;
Location location = new Location(building, room);
List <DayOfWeek> days = enumerator.Current.InnerText.ToDayOfWeek();
enumerator.MoveNext();
Time start = enumerator.Current.InnerText;
enumerator.MoveNext();
Time end = enumerator.Current.InnerText;
List <Weekday> weekdays = new List <Weekday>();
foreach (var day in days)
{
weekdays.Add(new Weekday(day, new ClassSpan(start, end)));
}
classes.Add(new ClassSequence(instructor, location, weekdays.ToArray()));
}
sections.Add(new Section(courseName, name, openSeats, waitlist, classes.ToArray()));
}
ret = new Course(courseName, fullName, sections.ToArray());
return(ret);
}
public static void Warning(string message) => WarningHandler?.Invoke(message);