190 lines
6.5 KiB
C#
190 lines
6.5 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.TelegramService.Core;
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public class TelegramCommand
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{
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public string CommandName { get; private set; }
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public string[] Args { get; private set; }
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public Message Message { get; private set; }
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public User User { get { return Message.From; } }
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public Chat Chat { get { return Message.Chat; } }
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public TelegramCommand(Message msg, string cmdName, string[] args = null)
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{
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Message = msg;
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CommandName = cmdName;
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Args = args;
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}
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}
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[Singletone]
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public class CommandModule
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{
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private readonly Regex _cmdReg = new Regex(@"^\/([^\s]+)\s?(.*)");
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private readonly Regex _argsReg = new Regex(@"[^""\s]\S*|"".+?""");
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private readonly Dictionary<string, MethodInfo> _commands = new Dictionary<string, MethodInfo>();
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private readonly Dictionary<string, Type> _contexts = new Dictionary<string, Type>();
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private readonly Dictionary<Type, ParamParser> _parsers = new Dictionary<Type, ParamParser>();
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private readonly IServiceScopeFactory _scopeFactory;
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private readonly ILogger<CommandModule> _log;
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public CommandModule(ILogger<CommandModule> logger, IServiceScopeFactory scopeFactory)
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{
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_scopeFactory = scopeFactory;
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_log = logger;
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var assembly = Assembly.GetExecutingAssembly();
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foreach (var t in assembly.GetExportedTypes())
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{
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if (t.IsAbstract)
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{
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continue;
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}
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if (t.IsSubclassOf(typeof(CommandContext)))
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{
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foreach (var method in t.GetRuntimeMethods())
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{
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if (method.IsPublic && Attribute.IsDefined(method, typeof(CommandAttribute)))
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{
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var attr = method.GetCustomAttribute<CommandAttribute>();
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_commands.Add(attr.Name, method);
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_contexts.Add(attr.Name, t);
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}
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}
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}
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if (t.IsSubclassOf(typeof(ParamParser)) && Attribute.IsDefined(t, typeof(ParamParserAttribute)))
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{
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_parsers.Add(t.GetCustomAttribute<ParamParserAttribute>().Type, (ParamParser)Activator.CreateInstance(t));
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}
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}
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}
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private TelegramCommand ParseCommand(Message msg)
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{
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var reg = _cmdReg.Match(msg.Text);
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var args = _argsReg.Matches(reg.Groups[2].Value);
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return new TelegramCommand(msg, reg.Groups[1].Value.ToLowerInvariant(), args.Count > 0 ? args.Select(a => a.Value).ToArray() : null);
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}
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private object[] ParseParams(MethodInfo cmd, string[] args)
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{
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var parsedParams = new List<object>();
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var cmdArgs = cmd.GetParameters();
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if (cmdArgs.Length > 0 && args == null || cmdArgs.Length != args.Length)
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{
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throw new Exception("Wrong parameters count");
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}
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for (var i = 0; i < cmdArgs.Length; i++)
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{
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var type = cmdArgs[i].ParameterType;
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var arg = args[i];
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if (type == typeof(string))
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{
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parsedParams.Add(arg);
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continue;
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}
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if (!_parsers.ContainsKey(type))
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{
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throw new Exception(string.Format("No parser found for type '{0}'", type));
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}
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parsedParams.Add(_parsers[type].FromString(arg));
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}
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return parsedParams.ToArray();
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}
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public async Task HandleCommand(Message msg, ITelegramBotClient client, int tenantId)
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{
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try
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{
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var cmd = ParseCommand(msg);
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if (!_commands.ContainsKey(cmd.CommandName))
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{
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throw new Exception($"No handler found for command '{cmd.CommandName}'");
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}
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var command = _commands[cmd.CommandName];
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var context = (CommandContext)_scopeFactory.CreateScope().ServiceProvider.GetService(_contexts[cmd.CommandName]);
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var param = ParseParams(command, cmd.Args);
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context.Context = cmd;
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context.Client = client;
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context.TenantId = tenantId;
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await Task.FromResult(command.Invoke(context, param));
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}
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catch (Exception ex)
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{
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_log.DebugCouldntHandle(msg.Text, ex);
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}
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}
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}
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public abstract class CommandContext
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{
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public ITelegramBotClient Client { get; set; }
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public TelegramCommand Context { get; set; }
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public int TenantId { get; set; }
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protected async Task ReplyAsync(string message)
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{
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await Client.SendTextMessageAsync(Context.Chat, message);
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}
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}
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public abstract class ParamParser
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{
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protected Type _type;
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protected ParamParser(Type type)
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{
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_type = type;
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}
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public abstract object FromString(string arg);
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public abstract string ToString(object arg);
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}
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public abstract class ParamParser<T> : ParamParser
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{
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protected ParamParser() : base(typeof(T)) { }
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public abstract override object FromString(string arg);
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public abstract override string ToString(object arg);
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} |