RegexBot/ModuleLoader.cs

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C#
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using System.Collections.ObjectModel;
using System.Reflection;
using System.Text;
namespace RegexBot;
static class ModuleLoader {
/// <summary>
/// Given the instance configuration, loads all appropriate types from file specified in it.
/// </summary>
internal static ReadOnlyCollection<RegexbotModule> Load(Configuration conf, RegexbotClient rb) {
var path = Path.GetDirectoryName(Assembly.GetEntryAssembly()!.Location) + Path.DirectorySeparatorChar;
var modules = new List<RegexbotModule>();
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// Load self, then others if defined
modules.AddRange(LoadModulesFromAssembly(Assembly.GetExecutingAssembly(), rb));
foreach (var file in conf.Assemblies) {
Assembly? a = null;
try {
a = Assembly.LoadFrom(path + file);
} catch (Exception ex) {
Console.WriteLine("An error occurred when attempting to load a module assembly.");
Console.WriteLine($"File: {file}");
Console.WriteLine(ex.ToString());
Environment.Exit(2);
}
IEnumerable<RegexbotModule>? amods = null;
try {
amods = LoadModulesFromAssembly(a, rb);
} catch (Exception ex) {
Console.WriteLine("An error occurred when attempting to create a module instance.");
Console.WriteLine(ex.ToString());
Environment.Exit(2);
}
modules.AddRange(amods);
}
return modules.AsReadOnly();
}
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static List<RegexbotModule> LoadModulesFromAssembly(Assembly asm, RegexbotClient rb) {
var eligibleTypes = from type in asm.GetTypes()
where !type.IsAssignableFrom(typeof(RegexbotModule))
where type.GetCustomAttribute<RegexbotModuleAttribute>() != null
select type;
var newreport = new StringBuilder($"---> Modules in {asm.GetName().Name}:");
var newmods = new List<RegexbotModule>();
foreach (var t in eligibleTypes) {
var mod = Activator.CreateInstance(t, rb)!;
newreport.Append($" {t.Name}");
newmods.Add((RegexbotModule)mod);
}
rb._svcLogging.DoLog(nameof(ModuleLoader), newreport.ToString());
return newmods;
}
}