/// <summary>
/// Unregisters a vanity resource.
/// </summary>
/// <param name="RegexPattern">Regular expression used to match incoming requests.</param>
/// <returns>If a vanity resource matching the parameters was found, and consequently removed.</returns>
public bool UnregisterVanityResource(string RegexPattern)
{
lock (this.vanityResources)
{
if (this.vanityResources.Remove(RegexPattern))
{
this.hasVanity = this.vanityResources.Count > 0;
this.vanityStep0 = null;
return(true);
}
else
{
return(false);
}
}
}
/// <summary>
/// Registers a vanity resource.
/// </summary>
/// <param name="RegexPattern">Regular expression used to match incoming requests.</param>
/// <param name="MapTo">Resources matching <paramref name="RegexPattern"/> will be mapped to resources of this type.
/// Named group values found using the regular expression can be used in the map, between curly braces { and }.</param>
public void RegisterVanityResource(string RegexPattern, string MapTo)
{
lock (this.vanityResources)
{
if (!this.vanityResources.TryGetValue(RegexPattern, out VanityExpression Exp))
{
Exp = new VanityExpression()
{
Pattern = RegexPattern,
Expression = new Regex(RegexPattern, RegexOptions.Singleline | RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.CultureInvariant)
};
this.vanityResources[RegexPattern] = Exp;
}
List <KeyValuePair <int, string> > Parameters = new List <KeyValuePair <int, string> >();
int i = MapTo.IndexOf('{');
int j;
while (i >= 0)
{
j = MapTo.IndexOf('}', i + 1);
if (j < 0)
{
break;
}
Parameters.Add(new KeyValuePair <int, string>(i, MapTo.Substring(i + 1, j - i - 1)));
MapTo = MapTo.Remove(i, j - i + 1);
i = MapTo.IndexOf('{', i);
}
Parameters.Reverse();
Exp.MapSeed = MapTo;
Exp.Parameters = Parameters.ToArray();
this.hasVanity = true;
this.vanityStep0 = null;
}
}
/// <summary>
/// Checks if a resource name is a vanity resource name. If so, it is expanded to the true resource name.
/// </summary>
/// <param name="ResourceName">Resource name.</param>
/// <returns>If resource was a vanity resource, and has been updated to reflect the true resource name.</returns>
public bool CheckVanityResource(ref string ResourceName)
{
if (this.hasVanity)
{
VanityStep Step = this.vanityStep0;
VanityStep Next;
char ch2;
if (Step is null)
{
VanityExpression[] Expressions;
lock (this.vanityResources)
{
Expressions = new VanityExpression[this.vanityResources.Count];
this.vanityResources.Values.CopyTo(Expressions, 0);
}
Step = vanityStep0 = VanityStep.CalcStep((char)0, Expressions);
}
foreach (char ch in ResourceName)
{
if (!(Step.Expressions is null))
{
foreach (VanityMap Map in Step.Expressions)
{
Match M = Map.Expression.Match(ResourceName);
if (M.Success && M.Index == 0 && M.Length == ResourceName.Length)
{
ResourceName = Map.MapSeed;
foreach (KeyValuePair <int, string> P in Map.Parameters)
{
ResourceName = ResourceName.Insert(P.Key, M.Groups[P.Value]?.Value ?? string.Empty);
}
return(true);
}
}
}
if (Step.Next is null)
{
return(false);
}
Next = null;
foreach (VanityStep Step2 in Step.Next)
{
ch2 = Step2.Character;
if (ch2 == ch)
{
Next = Step2;
break;
}
else if (ch2 > ch)
{
return(false);
}
}
if (Next is null)
{
return(false);
}
Step = Next;
}
}
return(false);
}
