/// <summary>
/// Creates a unique script callback handle for the specified callback method.<br/>
/// The returned handle can be used for certain API functions that take a script name as a parameter.
/// </summary>
/// <param name="handler">The callback function.</param>
/// <returns>The callback handle.</returns>
public ScriptCallbackHandle CreateUniqueHandler(Func <CallInfo, ScriptHandleResult> handler)
{
string scriptName;
do
{
scriptName = ResourceNameGenerator.Create();
}while (IsScriptRegistered(scriptName));
ScriptCallbackHandle handle = RegisterScriptHandler(scriptName, handler);
return(handle);
}
/// <summary>
/// Registers the specified action as a callback for the specified script name.
/// </summary>
/// <param name="scriptName">The script name to be handled.</param>
/// <param name="callback">The function invoked when this script is called by the Virtual Machine.</param>
/// <returns>A handle that can be disposed to remove the handler.</returns>
/// <exception cref="ArgumentException">Thrown if the specified script name is internally used by Anvil.</exception>
/// <exception cref="InvalidOperationException">Thrown if the specified script already has a handler defined.</exception>
public ScriptCallbackHandle RegisterScriptHandler(string scriptName, Func <CallInfo, ScriptHandleResult> callback)
{
if (!scriptName.IsValidScriptName())
{
throw new ArgumentException("The specified script name is not valid.", scriptName);
}
if (activeHandlers.ContainsKey(scriptName))
{
throw new InvalidOperationException($"A handler is already registered for script name {scriptName}");
}
ScriptCallbackHandle handle = new ScriptCallbackHandle(scriptName, callback);
activeHandlers.Add(scriptName, handle);
handle.IsValid = true;
return(handle);
}