public Category(string path)
{
this.Path = path;
// GetFileName returns just the name from a path, even for directories
this.Name = System.IO.Path.GetFileName(path);
string[] splitName = StringFuncs.SplitName(Name);
ProductCode = splitName[0];
Metadata = splitName.ElementAtOrDefault(1); // sets to null if there is no other metadata
if (Metadata is null)
{
MetaList = new string[] { "" }; // set to empty string to do intersection count
}
else
{
MetaList = StringFuncs.SplitMetadata(Metadata);
}
}
// Return the best category for a given image
public static Category FindCategory(string imageName, Dictionary <string, List <Category> > categories)
{
var comparer = StringComparer.OrdinalIgnoreCase; // used to ignore case in comparisons
string[] splitName = StringFuncs.SplitName(imageName);
string productName = splitName[0];
string metadata = splitName.ElementAtOrDefault(1); // returns null if there is no metadata
// Return null if there is no matching category
if (!categories.ContainsKey(productName))
{
Console.WriteLine("No category for {0}", imageName);
return(null);
}
// Narrow down the categories to just ones with a matching product name
var matchingCategories = categories[productName];
// If the image only has a name, return category with no other metadata
if (metadata is null)
{
Category baseCategory = matchingCategories.First(cat => cat.Metadata is null);
return(baseCategory);
}
List <string> metaList = StringFuncs.SplitMetadata(metadata).ToList();
// Sort by number of matching metadata items between categories and images.
// This is done through ordering the count of the intersection between the two.
// Doing it this way handles arbitrary ordering and number of metadata tags.
IEnumerable <Category> match = matchingCategories
.OrderByDescending(cat => metaList.Intersect(cat.MetaList, comparer).Count());
// Remove all cases where the category has more metadata than the image.
// Keep categories without metadata (metaList[0] = "").
match = match.Where(cat => cat.MetaList[0] == "" || !cat.MetaList.Except(metaList, comparer).Any());
// Return the best match
return(match.Any() ? match.First() : null);
}