// Calculates the relevancy of each item in the search results using a heuristic, then stores these values along with all the courses in the results.
private void storeSearchResults(List <List <int> > matching, List <string> querySplit, string correctedQuery)
{
lastSearchResults.courses.Clear();
lastSearchResults.relevance.Clear();
int j = 0;
foreach (var match in matching) // For each word of corrected query
{
foreach (var id in match) // For each course ID of courses that contain the corrected query word in their title or course code
{
if (lastSearchResults.relevance.ContainsKey(id))
{
lastSearchResults.relevance[id]++; // Increment the number of matching words for the course "id"
// If it matches the department code rather than just part of the course title, the relevance will be increased an extra amount for better results (see below)
}
else
{
lastSearchResults.courses.Add(new Course(id));
lastSearchResults.relevance[id] = 1; // This course has one matching word
// For the following line, if a course matches the query completely (every word), then that course is given one extra relevancy.
// I'm not sure if this will improve search results much. It's an experimental feature. It can be safely commented out to disable it.
lastSearchResults.relevance[id] += (querySplit.Count != 1 && correctedQuery.Split().ToList().Count == querySplit.Count && correctedQuery.Split().All(i => spelling.getDictionaryFileContents()[id].ToLower().Split().Contains(i))) ? 1 : 0;
}
// This loop adds extra relevance to results whose department code (part of its course code) matches part of the query
// For example, CS courses have higher relevance in search results than the business courses that have "computer" in the name when the user searches for "computer"
foreach (string word in spelling.getDictionaryFileContents()[id].Split())
{
if (Regex.IsMatch(word, @"^\d+$")) // Breaks once it reaches the course number
{
break;
}
else
{
if (j < correctedQuery.Split().ToList().Count&& correctedQuery.Split()[j] == word.ToLower()) // If a word in the query matches a department code of a course, it counts extra towards the relevance of that course in the search results
{
lastSearchResults.relevance[id]++; //bestMatches[id]++; // For now, increase the relevance by an extra 1. Remove this line to remove the effect of this whole feature.
}
}
}
// Note: Courses whose titles or course codes match more words of the corrected query have a higher "relevance" and will appear at the top of search results.
}
j++;
}
}