public static void AddData(this ITag tag, string key, string value)
{
if (string.IsNullOrWhiteSpace(key))
{
throw new ArgumentException();
}
tag.AddAttribute($"data-{key}", value);
}
public static void AddTitle(this ITag tag, string title)
{
if (string.IsNullOrWhiteSpace(title))
{
throw new ArgumentException();
}
tag.AddAttribute("title", title);
}
public static void AddClasses(this ITag tag, params string[] classes)
{
var distinctClasses = classes.GroupBy(c => c)
.Select(c => c.First())
.Where(c => !string.IsNullOrWhiteSpace(c));
tag.AddAttribute("class", string.Join(" ", distinctClasses));
}
public static void AddId(this ITag tag, string id)
{
if (string.IsNullOrEmpty(id))
{
throw new ArgumentException("id can't be empty");
}
if (!id[0].IsLetter())
{
throw new ArgumentException("first id character must be a letter");
}
for (int i = 1; i < id.Length; i++)
{
if (!id[i].IsValidIdCharacter())
{
throw new ArgumentException($"id cannot contain character {id[i]}");
}
}
tag.AddAttribute("id", id);
}