internal static void LoadAndInitializePlugins(TalknetEnv env)
{
var pluginsCache = new List <LoadedPlugin>();
pluginsCache.AddRange(LoadSelf());
pluginsCache.AddRange(LoadFromPluginDirectory());
// unique
foreach (var plugin in pluginsCache)
{
var name = plugin.Info.Name;
if (Plugins.ContainsKey(name))
{
if (plugin.PluginInstance.GetType().IsInstanceOfType(Plugins[name].PluginInstance))
{
continue;
}
throw new PluginLoadingException(string.Format(ErrMsg.PluginSameName, name, Plugins[name], plugin));
}
Plugins[name] = plugin;
}
// check requirements
var refs = new DAG <string>(Plugins.Keys);
foreach (var plugin in pluginsCache)
{
var thisName = plugin.Info.Name;
foreach (var req in plugin.Requirements)
{
var reqName = req.Requirement;
if (!Plugins.ContainsKey(reqName))
{
throw PluginLoadingException.ErrorReqNotSatisfied(plugin, reqName);
}
switch (req.Order)
{
case LoadOrderType.ThisFirst:
refs.AddEdge(thisName, reqName);
break;
case LoadOrderType.RequiredFirst:
refs.AddEdge(reqName, thisName);
break;
default:
continue;
}
}
}
_order = null;
try {
_order = refs.TopologicalOrder();
} catch (NotADagException) {
throw new PluginLoadingException(ErrMsg.LoadOrderCannotBeSatisfied);
}
foreach (var it in _order)
{
Plugins[it].PluginInstance.PluginInitialize(env);
}
}
// do not handle exceptions, just throw them
internal static IEnumerable <LoadedPlugin> LoadFromAssembly(Assembly ass, string from)
{
var cache = new List <LoadedPlugin>();
TalknetPluginAssemblyAttribute attrAssembly;
if ((attrAssembly = ass.GetCustomAttribute(typeof(TalknetPluginAssemblyAttribute)) as TalknetPluginAssemblyAttribute) == null)
{
return(new LoadedPlugin[0]);
}
var pluginsProvided = attrAssembly.Plugins;
if (pluginsProvided == null || pluginsProvided.Length == 0)
{
throw new PluginLoadingException(Clet.AssemblyNoPluginList, from);
}
foreach (var pluginType in pluginsProvided)
{
if (pluginType == null)
{
throw new PluginLoadingException(Clet.PluginListNullItem, from);
}
if (!pluginType.GetInterfaces().Contains(typeof(ITalknetPlugin)))
{
throw new PluginLoadingException(Clet.PluginNoInterface, from, pluginType.FullName);
}
TalknetPluginAttribute attr = null;
try {
if (pluginType.GetCustomAttribute(typeof(TalknetPluginAttribute)) is TalknetPluginAttribute v)
{
attr = v;
}
} catch (Exception ex) {
throw PluginLoadingException.ErrorGettingAttr(from, pluginType.FullName, ex);
}
if (attr == null)
{
throw new PluginLoadingException(Clet.PluginNoAttribute, from, pluginType.FullName);
}
// so it is
var info = attr.Info;
var ins = Activator.CreateInstance(pluginType) as ITalknetPlugin;
var requirements = pluginType.GetCustomAttributes(typeof(RequireAttribute)).Select(t => t as RequireAttribute);
if (!_pluginNameRegex.IsMatch(info.Name))
{
throw new PluginLoadingException(Clet.PluginInvalidName, from, pluginType.FullName);
}
cache.Add(new LoadedPlugin {
Info = info, PluginInstance = ins, Source = from, Requirements = requirements.ToArray()
});
}
return(cache);
}
