/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="output"></param>
/// <returns></returns>
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
if (TelephoneNumber.IsEmpty())
{
output.TagName = "span";
output.Attributes.RemoveAll("telephone");
return;
}
// Check to see if the number start with + ?
if (!TelephoneNumber.StartsWith("+"))
{
output.TagName = "span";
output.Attributes.RemoveAll("telephone");
return;
}
// Remove space hyphen and (0)
TelephoneNumber = TelephoneNumber.Replace("-", "").Replace(" ", "").Replace("(0)", "");
// Find non-numeric character and chop it off
int index = 1;
while (index < TelephoneNumber.Length)
{
if (!(TelephoneNumber[index] >= '0' && TelephoneNumber[index] <= '9'))
{
TelephoneNumber = TelephoneNumber.Substring(0, index);
}
index++;
}
// Telephone link
output.TagName = "a";
output.Attributes.RemoveAll("telephone");
output.Attributes.SetAttribute("href", $"tel:{TelephoneNumber}");
await base.ProcessAsync(context, output);
}