// Get all the possible variations for a given course, based on the loops/forks. Returns a list of VariationInfo,
// giving the code string, VariationPath, and name. Sorted by code string.
public static IEnumerable<VariationInfo> GetAllVariations(EventDB eventDB, Id<Course> courseId)
{
HashSet<Id<CourseControl>> alreadyVisited = new HashSet<PurplePen.Id<PurplePen.CourseControl>>();
CourseDesignator courseDesignator = new CourseDesignator(courseId);
Dictionary<Id<CourseControl>, char> variationMapper = GetVariantCodeMapping(eventDB, courseDesignator);
List<List<Id<CourseControl>>> variations = GetVariations(eventDB, courseDesignator, eventDB.GetCourse(courseId).firstCourseControl, alreadyVisited);
List<VariationInfo> result = new List<VariationInfo>();
// Check for no variations.
if (variations.Count == 1 && variations[0].Count == 0)
return result;
foreach (var choices in variations) {
string variationString = GetVariationString(eventDB, choices, variationMapper);
VariationInfo.VariationPath variationPath = new VariationInfo.VariationPath(choices);
result.Add(new VariationInfo(variationString, variationPath));
}
result.Sort((vi1, vi2) => string.Compare(vi1.CodeString, vi2.CodeString, StringComparison.OrdinalIgnoreCase));
return result;
}
