Add ICommandManager (#1273)

Dalamud/Plugin/Services/ICommandManager.cs

@@ -0,0 +1,46 @@
+using System.Collections.ObjectModel;
+
+using Dalamud.Game.Command;
+
+namespace Dalamud.Plugin.Services;
+
+/// <summary>
+/// This class manages registered in-game slash commands.
+/// </summary>
+public interface ICommandManager
+{
+    /// <summary>
+    /// Gets a read-only list of all registered commands.
+    /// </summary>
+    public ReadOnlyDictionary<string, CommandInfo> Commands { get; }
+
+    /// <summary>
+    /// Process a command in full.
+    /// </summary>
+    /// <param name="content">The full command string.</param>
+    /// <returns>True if the command was found and dispatched.</returns>
+    public bool ProcessCommand(string content);
+
+    /// <summary>
+    /// Dispatch the handling of a command.
+    /// </summary>
+    /// <param name="command">The command to dispatch.</param>
+    /// <param name="argument">The provided arguments.</param>
+    /// <param name="info">A <see cref="CommandInfo"/> object describing this command.</param>
+    public void DispatchCommand(string command, string argument, CommandInfo info);
+
+    /// <summary>
+    /// Add a command handler, which you can use to add your own custom commands to the in-game chat.
+    /// </summary>
+    /// <param name="command">The command to register.</param>
+    /// <param name="info">A <see cref="CommandInfo"/> object describing the command.</param>
+    /// <returns>If adding was successful.</returns>
+    public bool AddHandler(string command, CommandInfo info);
+
+    /// <summary>
+    /// Remove a command from the command handlers.
+    /// </summary>
+    /// <param name="command">The command to remove.</param>
+    /// <returns>If the removal was successful.</returns>
+    public bool RemoveHandler(string command);
+}