/// <summary>
/// Prepares a category or tag for create or update, making sure its title and slug are valid.
/// </summary>
/// <param name="tax">A category or tag.</param>
/// <param name="createOrUpdate"></param>
/// <returns></returns>
private async Task <ITaxonomy> PrepTaxonomyAsync(ITaxonomy tax, ECreateOrUpdate createOrUpdate)
{
// get existing titles and slugs
List <string> existingTitles = null;
List <string> existingSlugs = null;
ETaxonomyType type = ETaxonomyType.Category;
ITaxonomy origTax = tax;
if (tax is Category cat)
{
if (cat.Id != 0)
{
origTax = await _catRepo.GetAsync(cat.Id);
}
var allCats = await GetCategoriesAsync();
existingTitles = allCats.Select(c => c.Title).ToList();
existingSlugs = allCats.Select(c => c.Slug).ToList();
}
else
{
var tag = (Tag)tax;
if (tag.Id != 0)
{
origTax = await _tagRepo.GetAsync(tag.Id);
}
var allTags = await GetTagsAsync();
existingTitles = allTags.Select(c => c.Title).ToList();
existingSlugs = allTags.Select(c => c.Slug).ToList();
type = ETaxonomyType.Tag;
}
// remove self if it is update
if (createOrUpdate == ECreateOrUpdate.Update)
{
existingTitles.Remove(origTax.Title);
existingSlugs.Remove(origTax.Slug);
}
// html encode title and description
tax.Title = Util.CleanHtml(tax.Title);
tax.Description = Util.CleanHtml(tax.Description);
// validator
var validator = new TaxonomyValidator(existingTitles);
ValidationResult result = await validator.ValidateAsync(tax);
if (!result.IsValid)
{
throw new FanException($"Failed to {createOrUpdate.ToString().ToLower()} {type}.", result.Errors);
}
// slug always updated according to title
origTax.Slug = BlogUtil.FormatTaxonomySlug(tax.Title, existingSlugs);
origTax.Title = tax.Title;
origTax.Description = tax.Description;
origTax.Count = tax.Count;
_logger.LogDebug(createOrUpdate + " {@Taxonomy}", origTax);
return(origTax);
}
public void FormatTaxonomySlug_Test(string input, string expected, IEnumerable <string> existingSlugs = null)
{
Assert.Equal(expected, BlogUtil.FormatTaxonomySlug(input, existingSlugs));
}