// Default constructor voor President: standaard worden alle speeches persoonlijk geschreeuwd en op Twitter gedumpt
public President()
{
// Netjes een nieuwe delegate-instance voor de methode DeliverSpeechPersonally aanmaken, en aan PerformSpeech toewijzen.
// (NB: door gebruik van '=' worden eventuele eerdere delegates in PerformSpeech *vervangen* door deze nieuwe delegate
PerformSpeech = new SpeechMethod(SpeakPersonally);
// De korte versie (C# regelt zelf instantiatie van een delegate), en toe*voegen* (+=) aan PerformSpeech.
PerformSpeech += DumpOnTwitter;
}
/// <summary>
/// creates a new command
/// </summary>
/// <param name="method">the method</param>
/// <param name="invokeInstance">the instance to invoke the method on (or null for static methods)</param>
public void AddMethod(SpeechMethod method, object invokeInstance)
{
Dictionary <string, SpeechGroupTuple> langCommands;
//create lang if not exists
if (Commands.TryGetValue(method.Lang, out langCommands) == false)
{
langCommands = new Dictionary <string, SpeechGroupTuple>();
Commands.Add(method.Lang, langCommands);
}
//add the method to the right speech group
SpeechGroupTuple speechGroup;
if (langCommands.TryGetValue(method.SpeechGroupKey, out speechGroup) == false)
{
speechGroup = new SpeechGroupTuple(true);
langCommands.Add(method.SpeechGroupKey, speechGroup);
}
//check all synonyms
if (method.SpeechNames.Any(p => speechGroup.Commands.ContainsKey(p)))
{
//there is a synonyme that is already another speech name in this speech group -> invalid
throw new Exception("speech dictionary already contains a method with speech name: " + method.SpeechNames + " and key: " + method.Key);
}
else
{
var cmd = new SpeechTuple(true, method, invokeInstance);
foreach (var speechName in method.SpeechNames)
{
speechGroup.Commands.Add(speechName, cmd); //same command with different names...
}
}
}
/// <summary>
/// creates a new SpeechTuple
/// </summary>
/// <param name="isEnabled">true: group is enabled, false: not</param>
/// <param name="method">the method</param>
/// <param name="invokeInstance">the invoking instance</param>
public SpeechTuple(bool isEnabled, SpeechMethod method, object invokeInstance)
{
this.IsEnabled = isEnabled;
this.Method = method;
this.InvokeInstance = invokeInstance;
}
/// <summary>
/// crawls a method
/// </summary>
/// <param name="methodInfo">the method info</param>
/// <param name="type">the class of the method</param>
/// <param name="converters">the list of converters</param>
/// <returns>[1. lang, 2. speech method]</returns>
private static Dictionary <string, SpeechMethod> CrawlMethod(MethodInfo methodInfo, Type type, Dictionary <string, SpeechParameterConverter> converters)
{
var mattributes = methodInfo.GetCustomAttributes(typeof(SpeechMethodAttribute), false);
var crawledMethods = new Dictionary <string, SpeechMethod>();
if (mattributes.Length > 0)
{
IEnumerable <SpeechMethodAttribute> speechMethodAttributes = mattributes.Cast <SpeechMethodAttribute>();
foreach (var speechMethodAttribute in speechMethodAttributes)
{
//set method parameters
var speechMethod = new SpeechMethod();
speechMethod.Key = speechMethodAttribute.Key;
speechMethod.SpeechGroupKey = speechMethodAttribute.SpeechGroupKey;
speechMethod.Lang = speechMethodAttribute.Lang;
speechMethod.SpeechNames.AddRange(speechMethodAttribute.SpeechNames);
speechMethod.MethodInfo = methodInfo;
speechMethod.ExecutingType = type;
crawledMethods.Add(speechMethod.Lang, speechMethod);
}
//now get possible parameters
var parameters = methodInfo.GetParameters();
foreach (var parameterInfo in parameters)
{
var pattributes = parameterInfo.GetCustomAttributes(typeof(SpeechParameterAttribute), false);
if (pattributes.Length > 0)
{
var parameterAttributes = pattributes.Cast <SpeechParameterAttribute>();
foreach (var publicSpeechArgumentAttribute in parameterAttributes)
{
//set parameter parameters
var speechParameter = new SpeechParameter();
speechParameter.SpeechNames = publicSpeechArgumentAttribute.SpeechNames;
speechParameter.ParameterInfo = parameterInfo;
//check if we have a converter for this parameter
SpeechParameterConverter converter;
if (converters.TryGetValue(publicSpeechArgumentAttribute.ConverterKey, out converter))
{
//converter return type and parameter type must be equal
if (converter.MethodInfo.ReturnType == parameterInfo.ParameterType)
{
speechParameter.Converter = converter;
}
else
{
throw new Exception("the type returned by the converter: " + converter.Key + " (" + converter.MethodInfo.ReturnType + ") is not equal to the " +
"parameter type: " + parameterInfo.ParameterType + "(type: " + type.FullName + " method:" +
methodInfo.Name + " parameter " + parameterInfo.Name + ")");
}
}
else
{
throw new Exception("cannot find parameter converter with key: " + publicSpeechArgumentAttribute.ConverterKey + "\ntype: " +
type.FullName + " method: " + methodInfo.Name + " parameter: " + parameterInfo.Name);
}
SpeechMethod speechMethod;
if (crawledMethods.TryGetValue(publicSpeechArgumentAttribute.Lang, out speechMethod))
{
if (speechMethod.Arguments.Any(p => p.ParameterInfo.Name == parameterInfo.Name))
{
throw new Exception("only one parameter attribute per language is allowed, language: " + publicSpeechArgumentAttribute.Lang
+ " parameter: " + parameterInfo.Name);
}
else
{
speechMethod.Arguments.Add(speechParameter);
}
}
else
{
throw new Exception("no " + typeof(SpeechMethodAttribute).FullName + " specified for parameter: " +
parameterInfo.Name + " for lang: " + publicSpeechArgumentAttribute.Lang + " on type: " + type.FullName);
}
}
}
}
}
return(crawledMethods);
}