# HG changeset patch
# User Michael Lutz <michi@icosahedron.de>
# Date 2021-10-31 18:39:09
# Node ID 316b73a1be08d2be8f9f80f0d3d88ac4b5466b6c
# Parent  502baaa2877d30a2faeac5b22f41924eda1242ae

Codechange: Template DoCommandP to automagically reflect the parameters of the command proc.

When finished, this will allow each command handler to take individually
different parameters, obliviating the need for bit-packing.

diff --git a/src/ai/ai_gui.cpp b/src/ai/ai_gui.cpp
--- a/src/ai/ai_gui.cpp
+++ b/src/ai/ai_gui.cpp
@@ -28,6 +28,8 @@
 #include "../hotkeys.h"
 #include "../core/geometry_func.hpp"
 #include "../guitimer_func.h"
+#include "../company_cmd.h"
+#include "../misc_cmd.h"
 
 #include "ai.hpp"
 #include "ai_gui.hpp"
@@ -1290,8 +1292,8 @@ struct AIDebugWindow : public Window {
 			case WID_AID_RELOAD_TOGGLE:
 				if (ai_debug_company == OWNER_DEITY) break;
 				/* First kill the company of the AI, then start a new one. This should start the current AI again */
-				DoCommandP(CMD_COMPANY_CTRL, 0, CCA_DELETE | ai_debug_company << 16 | CRR_MANUAL << 24, 0);
-				DoCommandP(CMD_COMPANY_CTRL, 0, CCA_NEW_AI | ai_debug_company << 16, 0);
+				Command<CMD_COMPANY_CTRL>::Post(0, CCA_DELETE | ai_debug_company << 16 | CRR_MANUAL << 24, 0, {});
+				Command<CMD_COMPANY_CTRL>::Post(0, CCA_NEW_AI | ai_debug_company << 16, 0, {});
 				break;
 
 			case WID_AID_SETTINGS:
@@ -1330,7 +1332,7 @@ struct AIDebugWindow : public Window {
 						}
 						if (all_unpaused) {
 							/* All scripts have been unpaused => unpause the game. */
-							DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 0);
+							Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 0, {});
 						}
 					}
 				}
@@ -1379,7 +1381,7 @@ struct AIDebugWindow : public Window {
 
 					/* Pause the game. */
 					if ((_pause_mode & PM_PAUSED_NORMAL) == PM_UNPAUSED) {
-						DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 1);
+						Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
 					}
 
 					/* Highlight row that matched */
diff --git a/src/airport_gui.cpp b/src/airport_gui.cpp
--- a/src/airport_gui.cpp
+++ b/src/airport_gui.cpp
@@ -71,7 +71,7 @@ static void PlaceAirport(TileIndex tile)
 			uint32 p2_final = p2;
 			if (to_join != INVALID_STATION) SB(p2_final, 16, 16, to_join);
 
-			return DoCommandP(CMD_BUILD_AIRPORT, STR_ERROR_CAN_T_BUILD_AIRPORT_HERE, CcBuildAirport, tile, p1, p2_final);
+			return Command<CMD_BUILD_AIRPORT>::Post(STR_ERROR_CAN_T_BUILD_AIRPORT_HERE, CcBuildAirport, tile, p1, p2_final, {});
 		}
 	};
 
diff --git a/src/autoreplace_gui.cpp b/src/autoreplace_gui.cpp
--- a/src/autoreplace_gui.cpp
+++ b/src/autoreplace_gui.cpp
@@ -25,6 +25,9 @@
 #include "rail_gui.h"
 #include "road_gui.h"
 #include "widgets/dropdown_func.h"
+#include "autoreplace_cmd.h"
+#include "group_cmd.h"
+#include "settings_cmd.h"
 
 #include "widgets/autoreplace_widget.h"
 
@@ -217,7 +220,7 @@ class ReplaceVehicleWindow : public Wind
 	{
 		EngineID veh_from = this->sel_engine[0];
 		EngineID veh_to = this->sel_engine[1];
-		DoCommandP(CMD_SET_AUTOREPLACE, 0, (replace_when_old ? 1 : 0) | (this->sel_group << 16), veh_from + (veh_to << 16));
+		Command<CMD_SET_AUTOREPLACE>::Post(0, (replace_when_old ? 1 : 0) | (this->sel_group << 16), veh_from + (veh_to << 16), {});
 	}
 
 public:
@@ -541,10 +544,10 @@ public:
 			case WID_RV_TRAIN_WAGONREMOVE_TOGGLE: {
 				const Group *g = Group::GetIfValid(this->sel_group);
 				if (g != nullptr) {
-					DoCommandP(CMD_SET_GROUP_FLAG, 0, this->sel_group | (GroupFlags::GF_REPLACE_WAGON_REMOVAL << 16), (HasBit(g->flags, GroupFlags::GF_REPLACE_WAGON_REMOVAL) ? 0 : 1) | (_ctrl_pressed << 1));
+					Command<CMD_SET_GROUP_FLAG>::Post(0, this->sel_group | (GroupFlags::GF_REPLACE_WAGON_REMOVAL << 16), (HasBit(g->flags, GroupFlags::GF_REPLACE_WAGON_REMOVAL) ? 0 : 1) | (_ctrl_pressed << 1), {});
 				} else {
 					// toggle renew_keep_length
-					DoCommandP(CMD_CHANGE_COMPANY_SETTING, 0, 0, Company::Get(_local_company)->settings.renew_keep_length ? 0 : 1, "company.renew_keep_length");
+					Command<CMD_CHANGE_COMPANY_SETTING>::Post(0, 0, Company::Get(_local_company)->settings.renew_keep_length ? 0 : 1, "company.renew_keep_length");
 				}
 				break;
 			}
@@ -562,7 +565,7 @@ public:
 
 			case WID_RV_STOP_REPLACE: { // Stop replacing
 				EngineID veh_from = this->sel_engine[0];
-				DoCommandP(CMD_SET_AUTOREPLACE, 0, this->sel_group << 16, veh_from + (INVALID_ENGINE << 16));
+				Command<CMD_SET_AUTOREPLACE>::Post(0, this->sel_group << 16, veh_from + (INVALID_ENGINE << 16), {});
 				break;
 			}
 
@@ -584,7 +587,7 @@ public:
 				if (click_side == 0 && _ctrl_pressed && e != INVALID_ENGINE &&
 					(GetGroupNumEngines(_local_company, sel_group, e) == 0 || GetGroupNumEngines(_local_company, ALL_GROUP, e) == 0)) {
 						EngineID veh_from = e;
-						DoCommandP(CMD_SET_AUTOREPLACE, 0, this->sel_group << 16, veh_from + (INVALID_ENGINE << 16));
+						Command<CMD_SET_AUTOREPLACE>::Post(0, this->sel_group << 16, veh_from + (INVALID_ENGINE << 16), {});
 						break;
 				}
 
diff --git a/src/bridge_gui.cpp b/src/bridge_gui.cpp
--- a/src/bridge_gui.cpp
+++ b/src/bridge_gui.cpp
@@ -119,8 +119,8 @@ private:
 			case TRANSPORT_ROAD: _last_roadbridge_type = this->bridges->at(i).index; break;
 			default: break;
 		}
-		DoCommandP(CMD_BUILD_BRIDGE, STR_ERROR_CAN_T_BUILD_BRIDGE_HERE, CcBuildBridge,
-					this->end_tile, this->start_tile, this->type | this->bridges->at(i).index);
+		Command<CMD_BUILD_BRIDGE>::Post(STR_ERROR_CAN_T_BUILD_BRIDGE_HERE, CcBuildBridge,
+					this->end_tile, this->start_tile, this->type | this->bridges->at(i).index, {});
 	}
 
 	/** Sort the builable bridges */
@@ -385,7 +385,7 @@ void ShowBuildBridgeWindow(TileIndex sta
 		default: break; // water ways and air routes don't have bridge types
 	}
 	if (_ctrl_pressed && CheckBridgeAvailability(last_bridge_type, bridge_len).Succeeded()) {
-		DoCommandP(CMD_BUILD_BRIDGE, STR_ERROR_CAN_T_BUILD_BRIDGE_HERE, CcBuildBridge, end, start, type | last_bridge_type);
+		Command<CMD_BUILD_BRIDGE>::Post(STR_ERROR_CAN_T_BUILD_BRIDGE_HERE, CcBuildBridge, end, start, type | last_bridge_type, {});
 		return;
 	}
 
diff --git a/src/build_vehicle_gui.cpp b/src/build_vehicle_gui.cpp
--- a/src/build_vehicle_gui.cpp
+++ b/src/build_vehicle_gui.cpp
@@ -30,6 +30,7 @@
 #include "cargotype.h"
 #include "core/geometry_func.hpp"
 #include "autoreplace_func.h"
+#include "engine_cmd.h"
 #include "train_cmd.h"
 #include "vehicle_cmd.h"
 
@@ -1460,7 +1461,7 @@ struct BuildVehicleWindow : Window {
 			case WID_BV_SHOW_HIDE: {
 				const Engine *e = (this->sel_engine == INVALID_ENGINE) ? nullptr : Engine::Get(this->sel_engine);
 				if (e != nullptr) {
-					DoCommandP(CMD_SET_VEHICLE_VISIBILITY, 0, 0, this->sel_engine | (e->IsHidden(_current_company) ? 0 : (1u << 31)));
+					Command<CMD_SET_VEHICLE_VISIBILITY>::Post(0, 0, this->sel_engine | (e->IsHidden(_current_company) ? 0 : (1u << 31)), {});
 				}
 				break;
 			}
@@ -1471,7 +1472,7 @@ struct BuildVehicleWindow : Window {
 					CommandCallback *callback = (this->vehicle_type == VEH_TRAIN && RailVehInfo(sel_eng)->railveh_type == RAILVEH_WAGON) ? CcBuildWagon : CcBuildPrimaryVehicle;
 					CargoID cargo = this->cargo_filter[this->cargo_filter_criteria];
 					if (cargo == CF_ANY || cargo == CF_ENGINES) cargo = CF_NONE;
-					DoCommandP(CMD_BUILD_VEHICLE, GetCmdBuildVehMsg(this->vehicle_type), callback, this->window_number, sel_eng | (cargo << 24), 0);
+					Command<CMD_BUILD_VEHICLE>::Post(GetCmdBuildVehMsg(this->vehicle_type), callback, this->window_number, sel_eng | (cargo << 24), 0, {});
 				}
 				break;
 			}
@@ -1636,7 +1637,7 @@ struct BuildVehicleWindow : Window {
 	{
 		if (str == nullptr) return;
 
-		DoCommandP(CMD_RENAME_ENGINE, STR_ERROR_CAN_T_RENAME_TRAIN_TYPE + this->vehicle_type, 0, this->rename_engine, 0, str);
+		Command<CMD_RENAME_ENGINE>::Post(STR_ERROR_CAN_T_RENAME_TRAIN_TYPE + this->vehicle_type, 0, this->rename_engine, 0, str);
 	}
 
 	void OnDropdownSelect(int widget, int index) override
diff --git a/src/cheat_gui.cpp b/src/cheat_gui.cpp
--- a/src/cheat_gui.cpp
+++ b/src/cheat_gui.cpp
@@ -28,6 +28,7 @@
 #include "tile_map.h"
 #include "newgrf.h"
 #include "error.h"
+#include "misc_cmd.h"
 
 #include "widgets/cheat_widget.h"
 
@@ -54,7 +55,7 @@ static int32 _money_cheat_amount = 10000
  */
 static int32 ClickMoneyCheat(int32 p1, int32 p2)
 {
-	DoCommandP(CMD_MONEY_CHEAT, 0, (uint32)(p2 * _money_cheat_amount), 0);
+	Command<CMD_MONEY_CHEAT>::Post(0, (uint32)(p2 * _money_cheat_amount), 0, {});
 	return _money_cheat_amount;
 }
 
diff --git a/src/command.cpp b/src/command.cpp
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -213,51 +213,50 @@ void CommandHelperBase::InternalDoAfter(
 	}
 }
 
-/*!
- * Toplevel network safe docommand function for the current company. Must not be called recursively.
- * The callback is called when the command succeeded or failed. The parameters
- * \a tile, \a p1, and \a p2 are from the #CommandProc function. The parameter \a cmd is the command to execute.
- * The parameter \a my_cmd is used to indicate if the command is from a company or the server.
- *
- * @param cmd The command to execute (a CMD_* value)
- * @param callback A callback function to call after the command is finished
- * @param my_cmd indicator if the command is from a company or server (to display error messages for a user)
- * @param network_command execute the command without sending it on the network
- * @param tile The tile to perform a command on (see #CommandProc)
- * @param p1 Additional data for the command (see #CommandProc)
- * @param p2 Additional data for the command (see #CommandProc)
- * @param text The text to pass
- * @return \c true if the command succeeded, else \c false.
+/**
+ * Decide what to do with the command depending on current game state.
+ * @param cmd Command to execute.
+ * @param flags Command flags.
+ * @param tile Tile of command execution.
+ * @param err_message Message prefix to show on error.
+ * @param network_command Does this command come from the network?
+ * @return error state + do only cost estimation? + send to network only?
  */
-static bool DoCommandP(Commands cmd, StringID err_message, CommandCallback *callback, bool my_cmd, bool network_command, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
+std::tuple<bool, bool, bool> CommandHelperBase::InternalPostBefore(Commands cmd, CommandFlags flags, TileIndex tile, StringID err_message, bool network_command)
 {
 	/* Cost estimation is generally only done when the
 	 * local user presses shift while doing something.
 	 * However, in case of incoming network commands,
 	 * map generation or the pause button we do want
 	 * to execute. */
-	bool estimate_only = _shift_pressed && IsLocalCompany() &&
-			!_generating_world &&
-			!network_command &&
-			!(GetCommandFlags(cmd) & CMD_NO_EST);
+	bool estimate_only = _shift_pressed && IsLocalCompany() && !_generating_world && !network_command && !(flags & CMD_NO_EST);
 
 	/* We're only sending the command, so don't do
 	 * fancy things for 'success'. */
 	bool only_sending = _networking && !network_command;
 
-	/* Where to show the message? */
+	if (_pause_mode != PM_UNPAUSED && !IsCommandAllowedWhilePaused(cmd) && !estimate_only) {
+		ShowErrorMessage(err_message, STR_ERROR_NOT_ALLOWED_WHILE_PAUSED, WL_INFO, TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE);
+		return { true, estimate_only, only_sending };
+	} else {
+		return { false, estimate_only, only_sending };
+	}
+}
+
+/**
+ * Process result of executing a command, possibly displaying any error to the player.
+ * @param res Command result.
+ * @param tile Tile of command execution.
+ * @param estimate_only Is this just cost estimation?
+ * @param only_sending Was the command only sent to network?
+ * @param err_message Message prefix to show on error.
+ * @param my_cmd Is the command from this client?
+ */
+void CommandHelperBase::InternalPostResult(const CommandCost &res, TileIndex tile, bool estimate_only, bool only_sending, StringID err_message, bool my_cmd)
+{
 	int x = TileX(tile) * TILE_SIZE;
 	int y = TileY(tile) * TILE_SIZE;
 
-	if (_pause_mode != PM_UNPAUSED && !IsCommandAllowedWhilePaused(cmd) && !estimate_only) {
-		ShowErrorMessage(err_message, STR_ERROR_NOT_ALLOWED_WHILE_PAUSED, WL_INFO, x, y);
-		return false;
-	}
-
-	/* Only set p2 when the command does not come from the network. */
-	if (!network_command && GetCommandFlags(cmd) & CMD_CLIENT_ID && p2 == 0) p2 = CLIENT_ID_SERVER;
-
-	CommandCost res = DoCommandPInternal(cmd, err_message, callback, my_cmd, estimate_only, network_command, tile, p1, p2, text);
 	if (res.Failed()) {
 		/* Only show the error when it's for us. */
 		if (estimate_only || (IsLocalCompany() && err_message != 0 && my_cmd)) {
@@ -273,95 +272,6 @@ static bool DoCommandP(Commands cmd, Str
 		 * concept of cost, so don't show it there either. */
 		ShowCostOrIncomeAnimation(x, y, GetSlopePixelZ(x, y), res.GetCost());
 	}
-
-	if (!estimate_only && !only_sending && callback != nullptr) {
-		callback(res, cmd, tile, p1, p2, text);
-	}
-
-	return res.Succeeded();
-}
-
-/**
- * Shortcut for the long DoCommandP when not using a callback or error message.
- * @param cmd The command to execute (a CMD_* value)
- * @param tile The tile to perform a command on (see #CommandProc)
- * @param p1 Additional data for the command (see #CommandProc)
- * @param p2 Additional data for the command (see #CommandProc)
- * @param text The text to pass
- * @return \c true if the command succeeded, else \c false.
- */
-bool DoCommandP(Commands cmd, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
-{
-	return DoCommandP(cmd, STR_NULL, nullptr, true, false, tile, p1, p2, text);
-}
-
-/**
- * Shortcut for the long DoCommandP when not using an error message.
- * @param cmd The command to execute (a CMD_* value)
- * @param callback A callback function to call after the command is finished
- * @param tile The tile to perform a command on (see #CommandProc)
- * @param p1 Additional data for the command (see #CommandProc)
- * @param p2 Additional data for the command (see #CommandProc)
- * @param text The text to pass
- * @return \c true if the command succeeded, else \c false.
- */
-bool DoCommandP(Commands cmd, CommandCallback *callback, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
-{
-	return DoCommandP(cmd, STR_NULL, callback, true, false, tile, p1, p2, text);
-}
-
-/**
- * Shortcut for the long DoCommandP when not using a callback.
- * @param cmd The command to execute (a CMD_* value)
- * @param err_message Message prefix to show on error
- * @param tile The tile to perform a command on (see #CommandProc)
- * @param p1 Additional data for the command (see #CommandProc)
- * @param p2 Additional data for the command (see #CommandProc)
- * @param text The text to pass
- * @return \c true if the command succeeded, else \c false.
- */
-bool DoCommandP(Commands cmd, StringID err_message, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
-{
-	return DoCommandP(cmd, err_message, nullptr, true, false, tile, p1, p2, text);
-}
-
-/*!
- * Toplevel network safe docommand function for the current company. Must not be called recursively.
- * The callback is called when the command succeeded or failed. The parameters
- * \a tile, \a p1, and \a p2 are from the #CommandProc function. The parameter \a cmd is the command to execute.
- *
- * @param cmd The command to execute (a CMD_* value)
- * @param err_message Message prefix to show on error
- * @param callback A callback function to call after the command is finished
- * @param tile The tile to perform a command on (see #CommandProc)
- * @param p1 Additional data for the command (see #CommandProc)
- * @param p2 Additional data for the command (see #CommandProc)
- * @param text The text to pass
- * @return \c true if the command succeeded, else \c false.
- */
-bool DoCommandP(Commands cmd, StringID err_message, CommandCallback *callback, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
-{
-	return DoCommandP(cmd, err_message, callback, true, false, tile, p1, p2, text);
-}
-
-/**
- * Toplevel network safe docommand function for the current company. Must not be called recursively.
- * The callback is called when the command succeeded or failed. The parameters
- * \a tile, \a p1, and \a p2 are from the #CommandProc function. The parameter \a cmd is the command to execute.
- *
- * @param cmd The command to execute (a CMD_* value)
- * @param err_message Message prefix to show on error
- * @param callback A callback function to call after the command is finished
- * @param my_cmd indicator if the command is from a company or server (to display error messages for a user)
- * @param tile The tile to perform a command on (see #CommandProc)
- * @param p1 Additional data for the command (see #CommandProc)
- * @param p2 Additional data for the command (see #CommandProc)
- * @param text The text to pass
- * @return \c true if the command succeeded, else \c false.
- */
-bool InjectNetworkCommand(Commands cmd, StringID err_message, CommandCallback *callback, bool my_cmd, TileIndex tile, uint32 p1, uint32 p2, const std::string &text)
-{
-	return DoCommandP(cmd, err_message, callback, my_cmd, true, tile, p1, p2, text);
 }
 
 /** Helper to format command parameters into a hex string. */
diff --git a/src/command_func.h b/src/command_func.h
--- a/src/command_func.h
+++ b/src/command_func.h
@@ -37,14 +37,6 @@ static const CommandCost CMD_ERROR = Com
 /** Storage buffer for serialized command data. */
 typedef std::vector<byte> CommandDataBuffer;
 
-
-bool DoCommandP(Commands cmd, StringID err_message, CommandCallback *callback, TileIndex tile, uint32 p1, uint32 p2, const std::string &text = {});
-bool DoCommandP(Commands cmd, StringID err_message, TileIndex tile, uint32 p1, uint32 p2, const std::string &text = {});
-bool DoCommandP(Commands cmd, CommandCallback *callback, TileIndex tile, uint32 p1, uint32 p2, const std::string &text = {});
-bool DoCommandP(Commands cmd, TileIndex tile, uint32 p1, uint32 p2, const std::string &text = {});
-
-bool InjectNetworkCommand(Commands cmd, StringID err_message, CommandCallback *callback, bool my_cmd, TileIndex tile, uint32 p1, uint32 p2, const std::string &text);
-
 CommandCost DoCommandPInternal(Commands cmd, StringID err_message, CommandCallback *callback, bool my_cmd, bool estimate_only, bool network_command, TileIndex tile, uint32 p1, uint32 p2, const std::string &text);
 
 void NetworkSendCommand(Commands cmd, StringID err_message, CommandCallback *callback, CompanyID company, TileIndex tile, uint32 p1, uint32 p2, const std::string &text);
@@ -96,6 +88,8 @@ class CommandHelperBase {
 protected:
 	static void InternalDoBefore(bool top_level, bool test);
 	static void InternalDoAfter(CommandCost &res, DoCommandFlag flags, bool top_level, bool test);
+	static std::tuple<bool, bool, bool> InternalPostBefore(Commands cmd, CommandFlags flags, TileIndex tile, StringID err_message, bool network_command);
+	static void InternalPostResult(const CommandCost &res, TileIndex tile, bool estimate_only, bool only_sending, StringID err_message, bool my_cmd);
 };
 
 /**
@@ -147,6 +141,83 @@ public:
 
 		return res;
 	}
+
+	/**
+	 * Shortcut for the long Post when not using a callback.
+	 * @param err_message Message prefix to show on error
+	 * @param args Parameters for the command
+	 */
+	static inline bool Post(StringID err_message, Targs... args) { return Post(err_message, nullptr, std::forward<Targs>(args)...); }
+	/**
+	 * Shortcut for the long Post when not using an error message.
+	 * @param callback A callback function to call after the command is finished
+	 * @param args Parameters for the command
+	 */
+	static inline bool Post(CommandCallback *callback, Targs... args) { return Post((StringID)0, callback, std::forward<Targs>(args)...); }
+	/**
+	 * Shortcut for the long Post when not using a callback or an error message.
+	 * @param args Parameters for the command
+	 */
+	static inline bool Post(Targs... args) { return Post((StringID)0, nullptr, std::forward<Targs>(args)...); }
+
+	/**
+	 * Top-level network safe command execution for the current company.
+	 * Must not be called recursively. The callback is called when the
+	 * command succeeded or failed.
+	 *
+	 * @param err_message Message prefix to show on error
+	 * @param callback A callback function to call after the command is finished
+	 * @param args Parameters for the command
+	 * @return \c true if the command succeeded, else \c false.
+	 */
+	static bool Post(StringID err_message, CommandCallback *callback, Targs... args)
+	{
+		return InternalPost(err_message, callback, true, false, std::forward_as_tuple(args...));
+	}
+
+	/**
+	 * Execute a command coming from the network.
+	 * @param err_message Message prefix to show on error
+	 * @param callback A callback function to call after the command is finished
+	 * @param my_cmd indicator if the command is from a company or server (to display error messages for a user)
+	 * @param location Tile location for user feedback.
+	 * @param args Parameters for the command
+	 * @return \c true if the command succeeded, else \c false.
+	 */
+	static bool PostFromNet(StringID err_message, CommandCallback *callback, bool my_cmd, TileIndex location, std::tuple<Targs...> args)
+	{
+		return InternalPost(err_message, callback, my_cmd, true, location, std::move(args));
+	}
+
+protected:
+	static bool InternalPost(StringID err_message, CommandCallback *callback, bool my_cmd, bool network_command, std::tuple<Targs...> args)
+	{
+		/* Where to show the message? */
+		TileIndex tile{};
+		if constexpr (std::is_same_v<TileIndex, std::tuple_element_t<0, decltype(args)>>) {
+			tile = std::get<0>(args);
+		}
+
+		return InternalPost(err_message, callback, my_cmd, network_command, tile, std::move(args));
+	}
+
+	static bool InternalPost(StringID err_message, CommandCallback *callback, bool my_cmd, bool network_command, TileIndex tile, std::tuple<Targs...> args)
+	{
+		auto [err, estimate_only, only_sending] = InternalPostBefore(Tcmd, GetCommandFlags<Tcmd>(), tile, err_message, network_command);
+		if (err) return false;
+
+		/* Only set p2 when the command does not come from the network. */
+		if (!network_command && GetCommandFlags<Tcmd>() & CMD_CLIENT_ID && std::get<2>(args) == 0) std::get<2>(args) = CLIENT_ID_SERVER;
+
+		CommandCost res = std::apply(DoCommandPInternal, std::tuple_cat(std::make_tuple(Tcmd, err_message, callback, my_cmd, estimate_only, network_command), args));
+		InternalPostResult(res, tile, estimate_only, only_sending, err_message, my_cmd);
+
+		if (!estimate_only && !only_sending && callback != nullptr) {
+			std::apply(callback, std::tuple_cat(std::tuple<const CommandCost &, Commands>{ res, Tcmd }, args));
+		}
+
+		return res.Succeeded();
+	}
 };
 
 template <Commands Tcmd>
diff --git a/src/company_cmd.cpp b/src/company_cmd.cpp
--- a/src/company_cmd.cpp
+++ b/src/company_cmd.cpp
@@ -604,7 +604,7 @@ static bool MaybeStartNewCompany()
 	if (n < (uint)_settings_game.difficulty.max_no_competitors) {
 		/* Send a command to all clients to start up a new AI.
 		 * Works fine for Multiplayer and Singleplayer */
-		return DoCommandP(CMD_COMPANY_CTRL, 0, CCA_NEW_AI | INVALID_COMPANY << 16, 0);
+		return Command<CMD_COMPANY_CTRL>::Post(0, CCA_NEW_AI | INVALID_COMPANY << 16, 0, {});
 	}
 
 	return false;
diff --git a/src/company_gui.cpp b/src/company_gui.cpp
--- a/src/company_gui.cpp
+++ b/src/company_gui.cpp
@@ -37,6 +37,11 @@
 #include "station_func.h"
 #include "zoom_func.h"
 #include "sortlist_type.h"
+#include "company_cmd.h"
+#include "economy_cmd.h"
+#include "group_cmd.h"
+#include "misc_cmd.h"
+#include "object_cmd.h"
 
 #include "widgets/company_widget.h"
 
@@ -435,11 +440,11 @@ struct CompanyFinancesWindow : Window {
 				break;
 
 			case WID_CF_INCREASE_LOAN: // increase loan
-				DoCommandP(CMD_INCREASE_LOAN, STR_ERROR_CAN_T_BORROW_ANY_MORE_MONEY, 0, 0, _ctrl_pressed);
+				Command<CMD_INCREASE_LOAN>::Post(STR_ERROR_CAN_T_BORROW_ANY_MORE_MONEY, 0, 0, _ctrl_pressed, {});
 				break;
 
 			case WID_CF_REPAY_LOAN: // repay loan
-				DoCommandP(CMD_DECREASE_LOAN, STR_ERROR_CAN_T_REPAY_LOAN, 0, 0, _ctrl_pressed);
+				Command<CMD_DECREASE_LOAN>::Post(STR_ERROR_CAN_T_REPAY_LOAN, 0, 0, _ctrl_pressed, {});
 				break;
 
 			case WID_CF_INFRASTRUCTURE: // show infrastructure details
@@ -995,12 +1000,12 @@ public:
 			for (LiveryScheme scheme = LS_DEFAULT; scheme < LS_END; scheme++) {
 				/* Changed colour for the selected scheme, or all visible schemes if CTRL is pressed. */
 				if (HasBit(this->sel, scheme) || (_ctrl_pressed && _livery_class[scheme] == this->livery_class && HasBit(_loaded_newgrf_features.used_liveries, scheme))) {
-					DoCommandP(CMD_SET_COMPANY_COLOUR, 0, scheme | (widget == WID_SCL_PRI_COL_DROPDOWN ? 0 : 256), index);
+					Command<CMD_SET_COMPANY_COLOUR>::Post(0, scheme | (widget == WID_SCL_PRI_COL_DROPDOWN ? 0 : 256), index, {});
 				}
 			}
 		} else {
 			/* Setting group livery */
-			DoCommandP(CMD_SET_GROUP_LIVERY, 0, this->sel, (widget == WID_SCL_PRI_COL_DROPDOWN ? 0 : 256) | (index << 16));
+			Command<CMD_SET_GROUP_LIVERY>::Post(0, this->sel, (widget == WID_SCL_PRI_COL_DROPDOWN ? 0 : 256) | (index << 16), {});
 		}
 	}
 
@@ -1581,7 +1586,7 @@ public:
 
 			/* OK button */
 			case WID_SCMF_ACCEPT:
-				DoCommandP(CMD_SET_COMPANY_MANAGER_FACE, 0, 0, this->face);
+				Command<CMD_SET_COMPANY_MANAGER_FACE>::Post(0, 0, this->face, {});
 				FALLTHROUGH;
 
 			/* Cancel button */
@@ -2576,11 +2581,11 @@ struct CompanyWindow : Window
 				break;
 
 			case WID_C_BUY_SHARE:
-				DoCommandP(CMD_BUY_SHARE_IN_COMPANY, STR_ERROR_CAN_T_BUY_25_SHARE_IN_THIS, (TileIndex)0, this->window_number, 0);
+				Command<CMD_BUY_SHARE_IN_COMPANY>::Post(STR_ERROR_CAN_T_BUY_25_SHARE_IN_THIS, 0, this->window_number, 0, {});
 				break;
 
 			case WID_C_SELL_SHARE:
-				DoCommandP(CMD_SELL_SHARE_IN_COMPANY, STR_ERROR_CAN_T_SELL_25_SHARE_IN, (TileIndex)0, this->window_number, 0);
+				Command<CMD_SELL_SHARE_IN_COMPANY>::Post(STR_ERROR_CAN_T_SELL_25_SHARE_IN, 0, this->window_number, 0, {});
 				break;
 
 			case WID_C_COMPANY_PASSWORD:
@@ -2613,7 +2618,7 @@ struct CompanyWindow : Window
 
 	void OnPlaceObject(Point pt, TileIndex tile) override
 	{
-		if (DoCommandP(CMD_BUILD_OBJECT, STR_ERROR_CAN_T_BUILD_COMPANY_HEADQUARTERS, tile, OBJECT_HQ, 0) && !_shift_pressed) {
+		if (Command<CMD_BUILD_OBJECT>::Post(STR_ERROR_CAN_T_BUILD_COMPANY_HEADQUARTERS, tile, OBJECT_HQ, 0, {}) && !_shift_pressed) {
 			ResetObjectToPlace();
 			this->RaiseButtons();
 		}
@@ -2635,16 +2640,16 @@ struct CompanyWindow : Window
 				Money money = (Money)(strtoull(str, nullptr, 10) / _currency->rate);
 				uint32 money_c = Clamp(ClampToI32(money), 0, 20000000); // Clamp between 20 million and 0
 
-				DoCommandP(CMD_GIVE_MONEY, STR_ERROR_CAN_T_GIVE_MONEY, 0, money_c, this->window_number);
+				Command<CMD_GIVE_MONEY>::Post(STR_ERROR_CAN_T_GIVE_MONEY, 0, money_c, this->window_number, {});
 				break;
 			}
 
 			case WID_C_PRESIDENT_NAME:
-				DoCommandP(CMD_RENAME_PRESIDENT, STR_ERROR_CAN_T_CHANGE_PRESIDENT, 0, 0, 0, str);
+				Command<CMD_RENAME_PRESIDENT>::Post(STR_ERROR_CAN_T_CHANGE_PRESIDENT, 0, 0, 0, str);
 				break;
 
 			case WID_C_COMPANY_NAME:
-				DoCommandP(CMD_RENAME_COMPANY, STR_ERROR_CAN_T_CHANGE_COMPANY_NAME, 0, 0, 0, str);
+				Command<CMD_RENAME_COMPANY>::Post(STR_ERROR_CAN_T_CHANGE_COMPANY_NAME, 0, 0, 0, str);
 				break;
 
 			case WID_C_COMPANY_JOIN:
@@ -2771,7 +2776,7 @@ struct BuyCompanyWindow : Window {
 				break;
 
 			case WID_BC_YES:
-				DoCommandP(CMD_BUY_COMPANY, STR_ERROR_CAN_T_BUY_COMPANY, (TileIndex)0, this->window_number, 0);
+				Command<CMD_BUY_COMPANY>::Post(STR_ERROR_CAN_T_BUY_COMPANY, 0, this->window_number, 0, {});
 				break;
 		}
 	}
diff --git a/src/console_cmds.cpp b/src/console_cmds.cpp
--- a/src/console_cmds.cpp
+++ b/src/console_cmds.cpp
@@ -42,6 +42,8 @@
 #include "game/game.hpp"
 #include "table/strings.h"
 #include "walltime_func.h"
+#include "company_cmd.h"
+#include "misc_cmd.h"
 
 #include "safeguards.h"
 
@@ -630,7 +632,7 @@ DEF_CONSOLE_CMD(ConPauseGame)
 	}
 
 	if ((_pause_mode & PM_PAUSED_NORMAL) == PM_UNPAUSED) {
-		DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 1);
+		Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
 		if (!_networking) IConsolePrint(CC_DEFAULT, "Game paused.");
 	} else {
 		IConsolePrint(CC_DEFAULT, "Game is already paused.");
@@ -652,7 +654,7 @@ DEF_CONSOLE_CMD(ConUnpauseGame)
 	}
 
 	if ((_pause_mode & PM_PAUSED_NORMAL) != PM_UNPAUSED) {
-		DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 0);
+		Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 0, {});
 		if (!_networking) IConsolePrint(CC_DEFAULT, "Game unpaused.");
 	} else if ((_pause_mode & PM_PAUSED_ERROR) != PM_UNPAUSED) {
 		IConsolePrint(CC_DEFAULT, "Game is in error state and cannot be unpaused via console.");
@@ -863,7 +865,7 @@ DEF_CONSOLE_CMD(ConResetCompany)
 	}
 
 	/* It is safe to remove this company */
-	DoCommandP(CMD_COMPANY_CTRL, 0, CCA_DELETE | index << 16 | CRR_MANUAL << 24, 0);
+	Command<CMD_COMPANY_CTRL>::Post(0, CCA_DELETE | index << 16 | CRR_MANUAL << 24, 0, {});
 	IConsolePrint(CC_DEFAULT, "Company deleted.");
 
 	return true;
@@ -1220,7 +1222,7 @@ DEF_CONSOLE_CMD(ConStartAI)
 	}
 
 	/* Start a new AI company */
-	DoCommandP(CMD_COMPANY_CTRL, 0, CCA_NEW_AI | INVALID_COMPANY << 16, 0);
+	Command<CMD_COMPANY_CTRL>::Post(0, CCA_NEW_AI | INVALID_COMPANY << 16, 0, {});
 
 	return true;
 }
@@ -1256,8 +1258,8 @@ DEF_CONSOLE_CMD(ConReloadAI)
 	}
 
 	/* First kill the company of the AI, then start a new one. This should start the current AI again */
-	DoCommandP(CMD_COMPANY_CTRL, 0, CCA_DELETE | company_id << 16 | CRR_MANUAL << 24, 0);
-	DoCommandP(CMD_COMPANY_CTRL, 0, CCA_NEW_AI | company_id << 16, 0);
+	Command<CMD_COMPANY_CTRL>::Post(0, CCA_DELETE | company_id << 16 | CRR_MANUAL << 24, 0, {});
+	Command<CMD_COMPANY_CTRL>::Post(0, CCA_NEW_AI | company_id << 16, 0, {});
 	IConsolePrint(CC_DEFAULT, "AI reloaded.");
 
 	return true;
@@ -1294,7 +1296,7 @@ DEF_CONSOLE_CMD(ConStopAI)
 	}
 
 	/* Now kill the company of the AI. */
-	DoCommandP(CMD_COMPANY_CTRL, 0, CCA_DELETE | company_id << 16 | CRR_MANUAL << 24, 0);
+	Command<CMD_COMPANY_CTRL>::Post(0, CCA_DELETE | company_id << 16 | CRR_MANUAL << 24, 0, {});
 	IConsolePrint(CC_DEFAULT, "AI stopped, company deleted.");
 
 	return true;
diff --git a/src/depot_gui.cpp b/src/depot_gui.cpp
--- a/src/depot_gui.cpp
+++ b/src/depot_gui.cpp
@@ -26,6 +26,9 @@
 #include "vehiclelist.h"
 #include "order_backup.h"
 #include "zoom_func.h"
+#include "depot_cmd.h"
+#include "train_cmd.h"
+#include "vehicle_cmd.h"
 
 #include "widgets/depot_widget.h"
 
@@ -142,7 +145,7 @@ static void TrainDepotMoveVehicle(const 
 
 	if (wagon == v) return;
 
-	DoCommandP(CMD_MOVE_RAIL_VEHICLE, STR_ERROR_CAN_T_MOVE_VEHICLE, v->tile, v->index | (_ctrl_pressed ? 1 : 0) << 20, wagon == nullptr ? INVALID_VEHICLE : wagon->index);
+	Command<CMD_MOVE_RAIL_VEHICLE>::Post(STR_ERROR_CAN_T_MOVE_VEHICLE, v->tile, v->index | (_ctrl_pressed ? 1 : 0) << 20, wagon == nullptr ? INVALID_VEHICLE : wagon->index, {});
 }
 
 static VehicleCellSize _base_block_sizes_depot[VEH_COMPANY_END];    ///< Cell size for vehicle images in the depot view.
@@ -803,7 +806,7 @@ struct DepotWindow : Window {
 			case WID_D_STOP_ALL:
 			case WID_D_START_ALL: {
 				VehicleListIdentifier vli(VL_DEPOT_LIST, this->type, this->owner);
-				DoCommandP(CMD_MASS_START_STOP, this->window_number, (widget == WID_D_START_ALL ? (1 << 0) : 0), vli.Pack());
+				Command<CMD_MASS_START_STOP>::Post(this->window_number, (widget == WID_D_START_ALL ? (1 << 0) : 0), vli.Pack(), {});
 				break;
 			}
 
@@ -826,7 +829,7 @@ struct DepotWindow : Window {
 				break;
 
 			case WID_D_AUTOREPLACE:
-				DoCommandP(CMD_DEPOT_MASS_AUTOREPLACE, this->window_number, this->type, 0);
+				Command<CMD_DEPOT_MASS_AUTOREPLACE>::Post(this->window_number, this->type, 0, {});
 				break;
 
 		}
@@ -837,7 +840,7 @@ struct DepotWindow : Window {
 		if (str == nullptr) return;
 
 		/* Do depot renaming */
-		DoCommandP(CMD_RENAME_DEPOT, STR_ERROR_CAN_T_RENAME_DEPOT, 0, this->GetDepotIndex(), 0, str);
+		Command<CMD_RENAME_DEPOT>::Post(STR_ERROR_CAN_T_RENAME_DEPOT, 0, this->GetDepotIndex(), 0, str);
 	}
 
 	bool OnRightClick(Point pt, int widget) override
@@ -905,10 +908,10 @@ struct DepotWindow : Window {
 	{
 		if (_ctrl_pressed) {
 			/* Share-clone, do not open new viewport, and keep tool active */
-			DoCommandP(CMD_CLONE_VEHICLE, STR_ERROR_CAN_T_BUY_TRAIN + v->type, this->window_number, v->index, 1);
+			Command<CMD_CLONE_VEHICLE>::Post(STR_ERROR_CAN_T_BUY_TRAIN + v->type, this->window_number, v->index, 1, {});
 		} else {
-			/* Copy-clone, open viewport for new vehicle, and deselect the tool (assume player wants to changs things on new vehicle) */
-			if (DoCommandP(CMD_CLONE_VEHICLE, STR_ERROR_CAN_T_BUY_TRAIN + v->type, CcCloneVehicle, this->window_number, v->index, 0)) {
+			/* Copy-clone, open viewport for new vehicle, and deselect the tool (assume player wants to change things on new vehicle) */
+			if (Command<CMD_CLONE_VEHICLE>::Post(STR_ERROR_CAN_T_BUY_TRAIN + v->type, CcCloneVehicle, this->window_number, v->index, 0, {})) {
 				ResetObjectToPlace();
 			}
 		}
@@ -1002,7 +1005,7 @@ struct DepotWindow : Window {
 
 					if (this->GetVehicleFromDepotWndPt(pt.x - nwi->pos_x, pt.y - nwi->pos_y, &v, &gdvp) == MODE_DRAG_VEHICLE && sel != INVALID_VEHICLE) {
 						if (gdvp.wagon != nullptr && gdvp.wagon->index == sel && _ctrl_pressed) {
-							DoCommandP(CMD_REVERSE_TRAIN_DIRECTION, STR_ERROR_CAN_T_REVERSE_DIRECTION_RAIL_VEHICLE, Vehicle::Get(sel)->tile, Vehicle::Get(sel)->index, true);
+							Command<CMD_REVERSE_TRAIN_DIRECTION>::Post(STR_ERROR_CAN_T_REVERSE_DIRECTION_RAIL_VEHICLE, Vehicle::Get(sel)->tile, Vehicle::Get(sel)->index, true, {});
 						} else if (gdvp.wagon == nullptr || gdvp.wagon->index != sel) {
 							this->vehicle_over = INVALID_VEHICLE;
 							TrainDepotMoveVehicle(gdvp.wagon, sel, gdvp.head);
@@ -1027,7 +1030,7 @@ struct DepotWindow : Window {
 				this->SetDirty();
 
 				int sell_cmd = (v->type == VEH_TRAIN && (widget == WID_D_SELL_CHAIN || _ctrl_pressed)) ? 1 : 0;
-				DoCommandP(CMD_SELL_VEHICLE, GetCmdSellVehMsg(v->type), v->tile, v->index | sell_cmd << 20 | MAKE_ORDER_BACKUP_FLAG, 0);
+				Command<CMD_SELL_VEHICLE>::Post(GetCmdSellVehMsg(v->type), v->tile, v->index | sell_cmd << 20 | MAKE_ORDER_BACKUP_FLAG, 0, {});
 				break;
 			}
 
@@ -1091,7 +1094,7 @@ static void DepotSellAllConfirmationCall
 		DepotWindow *w = (DepotWindow*)win;
 		TileIndex tile = w->window_number;
 		byte vehtype = w->type;
-		DoCommandP(CMD_DEPOT_SELL_ALL_VEHICLES, tile, vehtype, 0);
+		Command<CMD_DEPOT_SELL_ALL_VEHICLES>::Post(tile, vehtype, 0, {});
 	}
 }
 
diff --git a/src/dock_gui.cpp b/src/dock_gui.cpp
--- a/src/dock_gui.cpp
+++ b/src/dock_gui.cpp
@@ -28,6 +28,8 @@
 #include "tunnelbridge_cmd.h"
 #include "dock_cmd.h"
 #include "station_cmd.h"
+#include "water_cmd.h"
+#include "waypoint_cmd.h"
 
 #include "widgets/dock_widget.h"
 
@@ -194,7 +196,7 @@ struct BuildDocksToolbarWindow : Window 
 				break;
 
 			case WID_DT_LOCK: // Build lock button
-				DoCommandP(CMD_BUILD_LOCK, STR_ERROR_CAN_T_BUILD_LOCKS, CcBuildDocks, tile, 0, 0);
+				Command<CMD_BUILD_LOCK>::Post(STR_ERROR_CAN_T_BUILD_LOCKS, CcBuildDocks, tile, 0, 0, {});
 				break;
 
 			case WID_DT_DEMOLISH: // Demolish aka dynamite button
@@ -202,7 +204,7 @@ struct BuildDocksToolbarWindow : Window 
 				break;
 
 			case WID_DT_DEPOT: // Build depot button
-				DoCommandP(CMD_BUILD_SHIP_DEPOT, STR_ERROR_CAN_T_BUILD_SHIP_DEPOT, CcBuildDocks, tile, _ship_depot_direction, 0);
+				Command<CMD_BUILD_SHIP_DEPOT>::Post(STR_ERROR_CAN_T_BUILD_SHIP_DEPOT, CcBuildDocks, tile, _ship_depot_direction, 0, {});
 				break;
 
 			case WID_DT_STATION: { // Build station button
@@ -220,7 +222,7 @@ struct BuildDocksToolbarWindow : Window 
 						uint32 p2_final = p2;
 						if (to_join != INVALID_STATION) SB(p2_final, 16, 16, to_join);
 
-						return DoCommandP(CMD_BUILD_DOCK, STR_ERROR_CAN_T_BUILD_DOCK_HERE, CcBuildDocks, tile, p1, p2_final);
+						return Command<CMD_BUILD_DOCK>::Post(STR_ERROR_CAN_T_BUILD_DOCK_HERE, CcBuildDocks, tile, p1, p2_final, {});
 					}
 				};
 
@@ -229,7 +231,7 @@ struct BuildDocksToolbarWindow : Window 
 			}
 
 			case WID_DT_BUOY: // Build buoy button
-				DoCommandP(CMD_BUILD_BUOY, STR_ERROR_CAN_T_POSITION_BUOY_HERE, CcBuildDocks, tile, 0, 0);
+				Command<CMD_BUILD_BUOY>::Post(STR_ERROR_CAN_T_POSITION_BUOY_HERE, CcBuildDocks, tile, 0, 0, {});
 				break;
 
 			case WID_DT_RIVER: // Build river button (in scenario editor)
@@ -237,7 +239,7 @@ struct BuildDocksToolbarWindow : Window 
 				break;
 
 			case WID_DT_BUILD_AQUEDUCT: // Build aqueduct button
-				DoCommandP(CMD_BUILD_BRIDGE, STR_ERROR_CAN_T_BUILD_AQUEDUCT_HERE, CcBuildBridge, tile, GetOtherAqueductEnd(tile), TRANSPORT_WATER << 15);
+				Command<CMD_BUILD_BRIDGE>::Post(STR_ERROR_CAN_T_BUILD_AQUEDUCT_HERE, CcBuildBridge, tile, GetOtherAqueductEnd(tile), TRANSPORT_WATER << 15, {});
 				break;
 
 			default: NOT_REACHED();
@@ -257,10 +259,10 @@ struct BuildDocksToolbarWindow : Window 
 					GUIPlaceProcDragXY(select_proc, start_tile, end_tile);
 					break;
 				case DDSP_CREATE_WATER:
-					DoCommandP(CMD_BUILD_CANAL, STR_ERROR_CAN_T_BUILD_CANALS, CcPlaySound_CONSTRUCTION_WATER, end_tile, start_tile, (_game_mode == GM_EDITOR && _ctrl_pressed) ? WATER_CLASS_SEA : WATER_CLASS_CANAL);
+					Command<CMD_BUILD_CANAL>::Post(STR_ERROR_CAN_T_BUILD_CANALS, CcPlaySound_CONSTRUCTION_WATER, end_tile, start_tile, (_game_mode == GM_EDITOR && _ctrl_pressed) ? WATER_CLASS_SEA : WATER_CLASS_CANAL, {});
 					break;
 				case DDSP_CREATE_RIVER:
-					DoCommandP(CMD_BUILD_CANAL, STR_ERROR_CAN_T_PLACE_RIVERS, CcPlaySound_CONSTRUCTION_WATER, end_tile, start_tile, WATER_CLASS_RIVER | (_ctrl_pressed ? 1 << 2 : 0));
+					Command<CMD_BUILD_CANAL>::Post(STR_ERROR_CAN_T_PLACE_RIVERS, CcPlaySound_CONSTRUCTION_WATER, end_tile, start_tile, WATER_CLASS_RIVER | (_ctrl_pressed ? 1 << 2 : 0), {});
 					break;
 
 				default: break;
diff --git a/src/economy.cpp b/src/economy.cpp
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -48,6 +48,7 @@
 #include "goal_base.h"
 #include "story_base.h"
 #include "linkgraph/refresh.h"
+#include "company_cmd.h"
 #include "economy_cmd.h"
 #include "vehicle_cmd.h"
 
@@ -629,7 +630,7 @@ static void CompanyCheckBankrupt(Company
 			 * player we are sure (the above check) that we are not the local
 			 * company and thus we won't be moved. */
 			if (!_networking || _network_server) {
-				DoCommandP(CMD_COMPANY_CTRL, 0, CCA_DELETE | (c->index << 16) | (CRR_BANKRUPT << 24), 0);
+				Command<CMD_COMPANY_CTRL>::Post(0, CCA_DELETE | (c->index << 16) | (CRR_BANKRUPT << 24), 0, {});
 				return;
 			}
 			break;
diff --git a/src/engine_gui.cpp b/src/engine_gui.cpp
--- a/src/engine_gui.cpp
+++ b/src/engine_gui.cpp
@@ -23,6 +23,7 @@
 #include "roadveh.h"
 #include "ship.h"
 #include "aircraft.h"
+#include "engine_cmd.h"
 
 #include "widgets/engine_widget.h"
 
@@ -125,7 +126,7 @@ struct EnginePreviewWindow : Window {
 	{
 		switch (widget) {
 			case WID_EP_YES:
-				DoCommandP(CMD_WANT_ENGINE_PREVIEW, 0, this->window_number, 0);
+				Command<CMD_WANT_ENGINE_PREVIEW>::Post(0, this->window_number, 0, {});
 				FALLTHROUGH;
 			case WID_EP_NO:
 				if (!_shift_pressed) this->Close();
diff --git a/src/fios_gui.cpp b/src/fios_gui.cpp
--- a/src/fios_gui.cpp
+++ b/src/fios_gui.cpp
@@ -27,6 +27,7 @@
 #include "core/geometry_func.hpp"
 #include "gamelog.h"
 #include "stringfilter_type.h"
+#include "misc_cmd.h"
 
 #include "widgets/fios_widget.h"
 
@@ -358,7 +359,7 @@ public:
 		/* pause is only used in single-player, non-editor mode, non-menu mode. It
 		 * will be unpaused in the WE_DESTROY event handler. */
 		if (_game_mode != GM_MENU && !_networking && _game_mode != GM_EDITOR) {
-			DoCommandP(CMD_PAUSE, 0, PM_PAUSED_SAVELOAD, 1);
+			Command<CMD_PAUSE>::Post(0, PM_PAUSED_SAVELOAD, 1, {});
 		}
 		SetObjectToPlace(SPR_CURSOR_ZZZ, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
 
@@ -402,7 +403,7 @@ public:
 	{
 		/* pause is only used in single-player, non-editor mode, non menu mode */
 		if (!_networking && _game_mode != GM_EDITOR && _game_mode != GM_MENU) {
-			DoCommandP(CMD_PAUSE, 0, PM_PAUSED_SAVELOAD, 0);
+			Command<CMD_PAUSE>::Post(0, PM_PAUSED_SAVELOAD, 0, {});
 		}
 		this->Window::Close();
 	}
diff --git a/src/goal_gui.cpp b/src/goal_gui.cpp
--- a/src/goal_gui.cpp
+++ b/src/goal_gui.cpp
@@ -23,6 +23,7 @@
 #include "story_base.h"
 #include "command_func.h"
 #include "string_func.h"
+#include "goal_cmd.h"
 
 #include "widgets/goal_widget.h"
 
@@ -382,17 +383,17 @@ struct GoalQuestionWindow : public Windo
 	{
 		switch (widget) {
 			case WID_GQ_BUTTON_1:
-				DoCommandP(CMD_GOAL_QUESTION_ANSWER, 0, this->window_number, this->button[0]);
+				Command<CMD_GOAL_QUESTION_ANSWER>::Post(0, this->window_number, this->button[0], {});
 				this->Close();
 				break;
 
 			case WID_GQ_BUTTON_2:
-				DoCommandP(CMD_GOAL_QUESTION_ANSWER, 0, this->window_number, this->button[1]);
+				Command<CMD_GOAL_QUESTION_ANSWER>::Post(0, this->window_number, this->button[1], {});
 				this->Close();
 				break;
 
 			case WID_GQ_BUTTON_3:
-				DoCommandP(CMD_GOAL_QUESTION_ANSWER, 0, this->window_number, this->button[2]);
+				Command<CMD_GOAL_QUESTION_ANSWER>::Post(0, this->window_number, this->button[2], {});
 				this->Close();
 				break;
 		}
diff --git a/src/group_gui.cpp b/src/group_gui.cpp
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -26,6 +26,7 @@
 #include "company_gui.h"
 #include "gui.h"
 #include "group_cmd.h"
+#include "vehicle_cmd.h"
 
 #include "widgets/group_widget.h"
 
@@ -641,7 +642,7 @@ public:
 		if (confirmed) {
 			VehicleGroupWindow *w = (VehicleGroupWindow*)win;
 			w->vli.index = ALL_GROUP;
-			DoCommandP(CMD_DELETE_GROUP, STR_ERROR_GROUP_CAN_T_DELETE, (TileIndex)0, w->group_confirm, 0);
+			Command<CMD_DELETE_GROUP>::Post(STR_ERROR_GROUP_CAN_T_DELETE, 0, w->group_confirm, 0, {});
 		}
 	}
 
@@ -772,7 +773,7 @@ public:
 			}
 
 			case WID_GL_CREATE_GROUP: { // Create a new group
-				DoCommandP(CMD_CREATE_GROUP, STR_ERROR_GROUP_CAN_T_CREATE, CcCreateGroup, 0, this->vli.vtype, this->vli.index);
+				Command<CMD_CREATE_GROUP>::Post(STR_ERROR_GROUP_CAN_T_CREATE, CcCreateGroup, 0, this->vli.vtype, this->vli.index, {});
 				break;
 			}
 
@@ -801,14 +802,14 @@ public:
 
 			case WID_GL_START_ALL:
 			case WID_GL_STOP_ALL: { // Start/stop all vehicles of the list
-				DoCommandP(CMD_MASS_START_STOP, 0, (1 << 1) | (widget == WID_GL_START_ALL ? (1 << 0) : 0), this->vli.Pack());
+				Command<CMD_MASS_START_STOP>::Post(0, (1 << 1) | (widget == WID_GL_START_ALL ? (1 << 0) : 0), this->vli.Pack(), {});
 				break;
 			}
 
 			case WID_GL_REPLACE_PROTECTION: {
 				const Group *g = Group::GetIfValid(this->vli.index);
 				if (g != nullptr) {
-					DoCommandP(CMD_SET_GROUP_FLAG, 0, this->vli.index | (GroupFlags::GF_REPLACE_PROTECTION << 16), (HasBit(g->flags, GroupFlags::GF_REPLACE_PROTECTION) ? 0 : 1) | (_ctrl_pressed << 1));
+					Command<CMD_SET_GROUP_FLAG>::Post(0, this->vli.index | (GroupFlags::GF_REPLACE_PROTECTION << 16), (HasBit(g->flags, GroupFlags::GF_REPLACE_PROTECTION) ? 0 : 1) | (_ctrl_pressed << 1), {});
 				}
 				break;
 			}
@@ -823,7 +824,7 @@ public:
 			case WID_GL_ALL_VEHICLES: // All vehicles
 			case WID_GL_DEFAULT_VEHICLES: // Ungrouped vehicles
 				if (g->parent != INVALID_GROUP) {
-					DoCommandP(CMD_ALTER_GROUP, STR_ERROR_GROUP_CAN_T_SET_PARENT, 0, this->group_sel | (1 << 16), INVALID_GROUP);
+					Command<CMD_ALTER_GROUP>::Post(STR_ERROR_GROUP_CAN_T_SET_PARENT, 0, this->group_sel | (1 << 16), INVALID_GROUP, {});
 				}
 
 				this->group_sel = INVALID_GROUP;
@@ -836,7 +837,7 @@ public:
 				GroupID new_g = id_g >= this->groups.size() ? INVALID_GROUP : this->groups[id_g]->index;
 
 				if (this->group_sel != new_g && g->parent != new_g) {
-					DoCommandP(CMD_ALTER_GROUP, STR_ERROR_GROUP_CAN_T_SET_PARENT, 0, this->group_sel | (1 << 16), new_g);
+					Command<CMD_ALTER_GROUP>::Post(STR_ERROR_GROUP_CAN_T_SET_PARENT, 0, this->group_sel | (1 << 16), new_g, {});
 				}
 
 				this->group_sel = INVALID_GROUP;
@@ -851,7 +852,7 @@ public:
 	{
 		switch (widget) {
 			case WID_GL_DEFAULT_VEHICLES: // Ungrouped vehicles
-				DoCommandP(CMD_ADD_VEHICLE_GROUP, STR_ERROR_GROUP_CAN_T_ADD_VEHICLE, 0, DEFAULT_GROUP, this->vehicle_sel | (_ctrl_pressed || this->grouping == GB_SHARED_ORDERS ? 1 << 31 : 0));
+				Command<CMD_ADD_VEHICLE_GROUP>::Post(STR_ERROR_GROUP_CAN_T_ADD_VEHICLE, 0, DEFAULT_GROUP, this->vehicle_sel | (_ctrl_pressed || this->grouping == GB_SHARED_ORDERS ? 1 << 31 : 0), {});
 
 				this->vehicle_sel = INVALID_VEHICLE;
 				this->group_over = INVALID_GROUP;
@@ -868,7 +869,7 @@ public:
 				uint id_g = this->group_sb->GetScrolledRowFromWidget(pt.y, this, WID_GL_LIST_GROUP);
 				GroupID new_g = id_g >= this->groups.size() ? NEW_GROUP : this->groups[id_g]->index;
 
-				DoCommandP(CMD_ADD_VEHICLE_GROUP, STR_ERROR_GROUP_CAN_T_ADD_VEHICLE, new_g == NEW_GROUP ? CcAddVehicleNewGroup : nullptr, 0, new_g, vindex | (_ctrl_pressed || this->grouping == GB_SHARED_ORDERS ? 1 << 31 : 0));
+				Command<CMD_ADD_VEHICLE_GROUP>::Post(STR_ERROR_GROUP_CAN_T_ADD_VEHICLE, new_g == NEW_GROUP ? CcAddVehicleNewGroup : nullptr, 0, new_g, vindex | (_ctrl_pressed || this->grouping == GB_SHARED_ORDERS ? 1 << 31 : 0), {});
 				break;
 			}
 
@@ -923,7 +924,7 @@ public:
 
 	void OnQueryTextFinished(char *str) override
 	{
-		if (str != nullptr) DoCommandP(CMD_ALTER_GROUP, STR_ERROR_GROUP_CAN_T_RENAME, 0, this->group_rename, 0, str);
+		if (str != nullptr) Command<CMD_ALTER_GROUP>::Post(STR_ERROR_GROUP_CAN_T_RENAME, 0, this->group_rename, 0, str);
 		this->group_rename = INVALID_GROUP;
 	}
 
@@ -953,19 +954,19 @@ public:
 						break;
 					case ADI_SERVICE: // Send for servicing
 					case ADI_DEPOT: { // Send to Depots
-						DoCommandP(CMD_SEND_VEHICLE_TO_DEPOT, GetCmdSendToDepotMsg(this->vli.vtype), 0, DEPOT_MASS_SEND | (index == ADI_SERVICE ? DEPOT_SERVICE : 0U), this->vli.Pack());
+						Command<CMD_SEND_VEHICLE_TO_DEPOT>::Post(GetCmdSendToDepotMsg(this->vli.vtype), 0, DEPOT_MASS_SEND | (index == ADI_SERVICE ? DEPOT_SERVICE : 0U), this->vli.Pack(), {});
 						break;
 					}
 
 					case ADI_ADD_SHARED: // Add shared Vehicles
 						assert(Group::IsValidID(this->vli.index));
 
-						DoCommandP(CMD_ADD_SHARED_VEHICLE_GROUP, STR_ERROR_GROUP_CAN_T_ADD_SHARED_VEHICLE, 0, this->vli.index, this->vli.vtype);
+						Command<CMD_ADD_SHARED_VEHICLE_GROUP>::Post(STR_ERROR_GROUP_CAN_T_ADD_SHARED_VEHICLE, 0, this->vli.index, this->vli.vtype, {});
 						break;
 					case ADI_REMOVE_ALL: // Remove all Vehicles from the selected group
 						assert(Group::IsValidID(this->vli.index));
 
-						DoCommandP(CMD_REMOVE_ALL_VEHICLES_GROUP, STR_ERROR_GROUP_CAN_T_REMOVE_ALL_VEHICLES, (TileIndex)0, this->vli.index, 0);
+						Command<CMD_REMOVE_ALL_VEHICLES_GROUP>::Post(STR_ERROR_GROUP_CAN_T_REMOVE_ALL_VEHICLES, 0, this->vli.index, 0, {});
 						break;
 					default: NOT_REACHED();
 				}
diff --git a/src/highscore_gui.cpp b/src/highscore_gui.cpp
--- a/src/highscore_gui.cpp
+++ b/src/highscore_gui.cpp
@@ -21,6 +21,7 @@
 #include "strings_func.h"
 #include "hotkeys.h"
 #include "zoom_func.h"
+#include "misc_cmd.h"
 
 #include "widgets/highscore_widget.h"
 
@@ -96,7 +97,7 @@ struct EndGameWindow : EndGameHighScoreB
 	EndGameWindow(WindowDesc *desc) : EndGameHighScoreBaseWindow(desc)
 	{
 		/* Pause in single-player to have a look at the highscore at your own leisure */
-		if (!_networking) DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 1);
+		if (!_networking) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
 
 		this->background_img = SPR_TYCOON_IMG1_BEGIN;
 
@@ -124,7 +125,7 @@ struct EndGameWindow : EndGameHighScoreB
 
 	void Close() override
 	{
-		if (!_networking) DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 0); // unpause
+		if (!_networking) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 0, {}); // unpause
 		ShowHighscoreTable(this->window_number, this->rank);
 		this->EndGameHighScoreBaseWindow::Close();
 	}
@@ -159,7 +160,7 @@ struct HighScoreWindow : EndGameHighScor
 	{
 		/* pause game to show the chart */
 		this->game_paused_by_player = _pause_mode == PM_PAUSED_NORMAL;
-		if (!_networking && !this->game_paused_by_player) DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 1);
+		if (!_networking && !this->game_paused_by_player) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
 
 		/* Close all always on-top windows to get a clean screen */
 		if (_game_mode != GM_MENU) HideVitalWindows();
@@ -174,7 +175,7 @@ struct HighScoreWindow : EndGameHighScor
 	{
 		if (_game_mode != GM_MENU) ShowVitalWindows();
 
-		if (!_networking && !this->game_paused_by_player) DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 0); // unpause
+		if (!_networking && !this->game_paused_by_player) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 0, {}); // unpause
 
 		this->EndGameHighScoreBaseWindow::Close();
 	}
diff --git a/src/industry_gui.cpp b/src/industry_gui.cpp
--- a/src/industry_gui.cpp
+++ b/src/industry_gui.cpp
@@ -39,6 +39,7 @@
 #include "widgets/industry_widget.h"
 #include "clear_map.h"
 #include "zoom_func.h"
+#include "industry_cmd.h"
 
 #include "table/strings.h"
 
@@ -679,7 +680,7 @@ public:
 			case WID_DPI_FUND_WIDGET: {
 				if (this->selected_type != INVALID_INDUSTRYTYPE) {
 					if (_game_mode != GM_EDITOR && _settings_game.construction.raw_industry_construction == 2 && GetIndustrySpec(this->selected_type)->IsRawIndustry()) {
-						DoCommandP(CMD_BUILD_INDUSTRY, STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY, 0, this->selected_type, InteractiveRandom());
+						Command<CMD_BUILD_INDUSTRY>::Post(STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY, 0, this->selected_type, InteractiveRandom(), {});
 						this->HandleButtonClick(WID_DPI_FUND_WIDGET);
 					} else {
 						HandlePlacePushButton(this, WID_DPI_FUND_WIDGET, SPR_CURSOR_INDUSTRY, HT_RECT);
@@ -716,13 +717,13 @@ public:
 			Backup<bool> old_generating_world(_generating_world, true, FILE_LINE);
 			_ignore_restrictions = true;
 
-			DoCommandP(CMD_BUILD_INDUSTRY, STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY, &CcBuildIndustry, tile, (layout_index << 8) | this->selected_type, seed);
+			Command<CMD_BUILD_INDUSTRY>::Post(STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY, &CcBuildIndustry, tile, (layout_index << 8) | this->selected_type, seed, {});
 
 			cur_company.Restore();
 			old_generating_world.Restore();
 			_ignore_restrictions = false;
 		} else {
-			success = DoCommandP(CMD_BUILD_INDUSTRY, STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY, tile, (layout_index << 8) | this->selected_type, seed);
+			success = Command<CMD_BUILD_INDUSTRY>::Post(STR_ERROR_CAN_T_CONSTRUCT_THIS_INDUSTRY, tile, (layout_index << 8) | this->selected_type, seed, {});
 		}
 
 		/* If an industry has been built, just reset the cursor and the system */
diff --git a/src/linkgraph/linkgraphschedule.cpp b/src/linkgraph/linkgraphschedule.cpp
--- a/src/linkgraph/linkgraphschedule.cpp
+++ b/src/linkgraph/linkgraphschedule.cpp
@@ -16,6 +16,7 @@
 #include "../framerate_type.h"
 #include "../command_func.h"
 #include "../network/network.h"
+#include "../misc_cmd.h"
 
 #include "../safeguards.h"
 
@@ -173,7 +174,7 @@ void StateGameLoop_LinkGraphPauseControl
 	if (_pause_mode & PM_PAUSED_LINK_GRAPH) {
 		/* We are paused waiting on a job, check the job every tick. */
 		if (!LinkGraphSchedule::instance.IsJoinWithUnfinishedJobDue()) {
-			DoCommandP(CMD_PAUSE, 0, PM_PAUSED_LINK_GRAPH, 0);
+			Command<CMD_PAUSE>::Post(0, PM_PAUSED_LINK_GRAPH, 0, {});
 		}
 	} else if (_pause_mode == PM_UNPAUSED &&
 			_date_fract == LinkGraphSchedule::SPAWN_JOIN_TICK - 2 &&
@@ -181,7 +182,7 @@ void StateGameLoop_LinkGraphPauseControl
 			LinkGraphSchedule::instance.IsJoinWithUnfinishedJobDue()) {
 		/* Perform check two _date_fract ticks before we would join, to make
 		 * sure it also works in multiplayer. */
-		DoCommandP(CMD_PAUSE, 0, PM_PAUSED_LINK_GRAPH, 1);
+		Command<CMD_PAUSE>::Post(0, PM_PAUSED_LINK_GRAPH, 1, {});
 	}
 }
 
diff --git a/src/main_gui.cpp b/src/main_gui.cpp
--- a/src/main_gui.cpp
+++ b/src/main_gui.cpp
@@ -33,6 +33,7 @@
 #include "guitimer_func.h"
 #include "error.h"
 #include "news_gui.h"
+#include "misc_cmd.h"
 
 #include "saveload/saveload.h"
 
@@ -326,7 +327,7 @@ struct MainWindow : Window
 
 			case GHK_MONEY: // Gimme money
 				/* You can only cheat for money in singleplayer mode. */
-				if (!_networking) DoCommandP(CMD_MONEY_CHEAT, 0, 10000000, 0);
+				if (!_networking) Command<CMD_MONEY_CHEAT>::Post(0, 10000000, 0, {});
 				break;
 
 			case GHK_UPDATE_COORDS: // Update the coordinates of all station signs
diff --git a/src/misc_cmd.cpp b/src/misc_cmd.cpp
--- a/src/misc_cmd.cpp
+++ b/src/misc_cmd.cpp
@@ -135,7 +135,7 @@ CommandCost CmdDecreaseLoan(DoCommandFla
 static void AskUnsafeUnpauseCallback(Window *w, bool confirmed)
 {
 	if (confirmed) {
-		DoCommandP(CMD_PAUSE, 0, PM_PAUSED_ERROR, 0);
+		Command<CMD_PAUSE>::Post(0, PM_PAUSED_ERROR, 0, {});
 	}
 }
 
diff --git a/src/network/network.cpp b/src/network/network.cpp
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -395,7 +395,7 @@ static void CheckPauseHelper(bool pause,
 {
 	if (pause == ((_pause_mode & pm) != PM_UNPAUSED)) return;
 
-	DoCommandP(CMD_PAUSE, 0, pm, pause ? 1 : 0);
+	Command<CMD_PAUSE>::Post(0, pm, pause ? 1 : 0, {});
 }
 
 /**
diff --git a/src/network/network_command.cpp b/src/network/network_command.cpp
--- a/src/network/network_command.cpp
+++ b/src/network/network_command.cpp
@@ -451,5 +451,5 @@ template <Commands Tcmd>
 void UnpackNetworkCommand(const CommandPacket *cp)
 {
 	auto args = EndianBufferReader::ToValue<typename CommandTraits<Tcmd>::Args>(cp->data);
-	std::apply(&InjectNetworkCommand, std::tuple_cat(std::make_tuple(Tcmd, cp->err_msg, cp->callback, cp->my_cmd), args));
+	Command<Tcmd>::PostFromNet(cp->err_msg, cp->callback, cp->my_cmd, cp->tile, args);
 }
diff --git a/src/network/network_gui.cpp b/src/network/network_gui.cpp
--- a/src/network/network_gui.cpp
+++ b/src/network/network_gui.cpp
@@ -36,6 +36,7 @@
 #include "../zoom_func.h"
 #include "../sprite.h"
 #include "../settings_internal.h"
+#include "../company_cmd.h"
 
 #include "../widgets/network_widget.h"
 
@@ -1395,7 +1396,7 @@ static void AdminCompanyResetCallback(Wi
 {
 	if (confirmed) {
 		if (NetworkCompanyHasClients(_admin_company_id)) return;
-		DoCommandP(CMD_COMPANY_CTRL, 0, CCA_DELETE | _admin_company_id << 16 | CRR_MANUAL << 24, 0);
+		Command<CMD_COMPANY_CTRL>::Post(0, CCA_DELETE | _admin_company_id << 16 | CRR_MANUAL << 24, 0, {});
 	}
 }
 
@@ -1535,7 +1536,7 @@ private:
 	static void OnClickCompanyNew(NetworkClientListWindow *w, Point pt, CompanyID company_id)
 	{
 		if (_network_server) {
-			DoCommandP(CMD_COMPANY_CTRL, 0, CCA_NEW, _network_own_client_id);
+			Command<CMD_COMPANY_CTRL>::Post(0, CCA_NEW, _network_own_client_id, {});
 		} else {
 			NetworkSendCommand(CMD_COMPANY_CTRL, STR_NULL, nullptr, _local_company, 0, CCA_NEW, 0, {});
 		}
diff --git a/src/network/network_server.cpp b/src/network/network_server.cpp
--- a/src/network/network_server.cpp
+++ b/src/network/network_server.cpp
@@ -29,6 +29,7 @@
 #include "../order_backup.h"
 #include "../core/pool_func.hpp"
 #include "../core/random_func.hpp"
+#include "../company_cmd.h"
 #include "../rev.h"
 #include <mutex>
 #include <condition_variable>
@@ -1555,7 +1556,7 @@ static void NetworkAutoCleanCompanies()
 			/* Is the company empty for autoclean_unprotected-months, and is there no protection? */
 			if (_settings_client.network.autoclean_unprotected != 0 && _network_company_states[c->index].months_empty > _settings_client.network.autoclean_unprotected && _network_company_states[c->index].password.empty()) {
 				/* Shut the company down */
-				DoCommandP(CMD_COMPANY_CTRL, 0, CCA_DELETE | c->index << 16 | CRR_AUTOCLEAN << 24, 0);
+				Command<CMD_COMPANY_CTRL>::Post(0, CCA_DELETE | c->index << 16 | CRR_AUTOCLEAN << 24, 0, {});
 				IConsolePrint(CC_INFO, "Auto-cleaned company #{} with no password.", c->index + 1);
 			}
 			/* Is the company empty for autoclean_protected-months, and there is a protection? */
@@ -1569,7 +1570,7 @@ static void NetworkAutoCleanCompanies()
 			/* Is the company empty for autoclean_novehicles-months, and has no vehicles? */
 			if (_settings_client.network.autoclean_novehicles != 0 && _network_company_states[c->index].months_empty > _settings_client.network.autoclean_novehicles && vehicles_in_company[c->index] == 0) {
 				/* Shut the company down */
-				DoCommandP(CMD_COMPANY_CTRL, 0, CCA_DELETE | c->index << 16 | CRR_AUTOCLEAN << 24, 0);
+				Command<CMD_COMPANY_CTRL>::Post(0, CCA_DELETE | c->index << 16 | CRR_AUTOCLEAN << 24, 0, {});
 				IConsolePrint(CC_INFO, "Auto-cleaned company #{} with no vehicles.", c->index + 1);
 			}
 		} else {
diff --git a/src/object_gui.cpp b/src/object_gui.cpp
--- a/src/object_gui.cpp
+++ b/src/object_gui.cpp
@@ -25,6 +25,7 @@
 #include "window_func.h"
 #include "zoom_func.h"
 #include "terraform_cmd.h"
+#include "object_cmd.h"
 
 #include "widgets/object_widget.h"
 
@@ -542,8 +543,8 @@ public:
 	void OnPlaceObject(Point pt, TileIndex tile) override
 	{
 		ObjectClass *objclass = ObjectClass::Get(_selected_object_class);
-		DoCommandP(CMD_BUILD_OBJECT, STR_ERROR_CAN_T_BUILD_OBJECT, CcTerraform,
-				tile, objclass->GetSpec(_selected_object_index)->Index(), _selected_object_view);
+		Command<CMD_BUILD_OBJECT>::Post(STR_ERROR_CAN_T_BUILD_OBJECT, CcTerraform,
+				tile, objclass->GetSpec(_selected_object_index)->Index(), _selected_object_view, {});
 	}
 
 	void OnPlaceObjectAbort() override
diff --git a/src/openttd.cpp b/src/openttd.cpp
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -66,6 +66,7 @@
 #include "framerate_type.h"
 #include "industry.h"
 #include "network/network_gui.h"
+#include "misc_cmd.h"
 
 #include "linkgraph/linkgraphschedule.h"
 
@@ -851,7 +852,7 @@ static void MakeNewGameDone()
 	/* In a dedicated server, the server does not play */
 	if (!VideoDriver::GetInstance()->HasGUI()) {
 		OnStartGame(true);
-		if (_settings_client.gui.pause_on_newgame) DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 1);
+		if (_settings_client.gui.pause_on_newgame) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
 		return;
 	}
 
@@ -880,7 +881,7 @@ static void MakeNewGameDone()
 		NetworkChangeCompanyPassword(_local_company, _settings_client.network.default_company_pass);
 	}
 
-	if (_settings_client.gui.pause_on_newgame) DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, 1);
+	if (_settings_client.gui.pause_on_newgame) Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, 1, {});
 
 	CheckEngines();
 	CheckIndustries();
@@ -1045,7 +1046,7 @@ void SwitchToMode(SwitchMode new_mode)
 				}
 				OnStartGame(_network_dedicated);
 				/* Decrease pause counter (was increased from opening load dialog) */
-				DoCommandP(CMD_PAUSE, 0, PM_PAUSED_SAVELOAD, 0);
+				Command<CMD_PAUSE>::Post(0, PM_PAUSED_SAVELOAD, 0, {});
 			}
 			break;
 		}
@@ -1067,7 +1068,7 @@ void SwitchToMode(SwitchMode new_mode)
 				SetLocalCompany(OWNER_NONE);
 				_settings_newgame.game_creation.starting_year = _cur_year;
 				/* Cancel the saveload pausing */
-				DoCommandP(CMD_PAUSE, 0, PM_PAUSED_SAVELOAD, 0);
+				Command<CMD_PAUSE>::Post(0, PM_PAUSED_SAVELOAD, 0, {});
 			} else {
 				SetDParamStr(0, GetSaveLoadErrorString());
 				ShowErrorMessage(STR_JUST_RAW_STRING, INVALID_STRING_ID, WL_ERROR);
diff --git a/src/order_backup.cpp b/src/order_backup.cpp
--- a/src/order_backup.cpp
+++ b/src/order_backup.cpp
@@ -171,7 +171,7 @@ CommandCost CmdClearOrderBackup(DoComman
 		/* If it's not a backup of us, ignore it. */
 		if (ob->user != user) continue;
 
-		DoCommandP(CMD_CLEAR_ORDER_BACKUP, 0, 0, user);
+		Command<CMD_CLEAR_ORDER_BACKUP>::Post(0, 0, user, {});
 		return;
 	}
 }
diff --git a/src/order_gui.cpp b/src/order_gui.cpp
--- a/src/order_gui.cpp
+++ b/src/order_gui.cpp
@@ -29,6 +29,7 @@
 #include "aircraft.h"
 #include "engine_func.h"
 #include "vehicle_func.h"
+#include "order_cmd.h"
 
 #include "widgets/order_widget.h"
 
@@ -591,7 +592,7 @@ private:
 		}
 		if (order->GetLoadType() == load_type) return; // If we still match, do nothing
 
-		DoCommandP(CMD_MODIFY_ORDER, STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_LOAD | (load_type << 4));
+		Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_LOAD | (load_type << 4), {});
 	}
 
 	/**
@@ -606,7 +607,7 @@ private:
 			if (order == nullptr) return;
 			i = (order->GetDepotOrderType() & ODTFB_SERVICE) ? DA_ALWAYS_GO : DA_SERVICE;
 		}
-		DoCommandP(CMD_MODIFY_ORDER, STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_DEPOT_ACTION | (i << 4));
+		Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_DEPOT_ACTION | (i << 4), {});
 	}
 
 	/**
@@ -621,7 +622,7 @@ private:
 				_settings_client.gui.new_nonstop && this->vehicle->IsGroundVehicle() ? ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS : ONSF_STOP_EVERYWHERE);
 		order.SetDepotActionType(ODATFB_NEAREST_DEPOT);
 
-		DoCommandP(CMD_INSERT_ORDER, STR_ERROR_CAN_T_INSERT_NEW_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), order.Pack());
+		Command<CMD_INSERT_ORDER>::Post(STR_ERROR_CAN_T_INSERT_NEW_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), order.Pack(), {});
 	}
 
 	/**
@@ -641,11 +642,11 @@ private:
 		}
 		if (order->GetUnloadType() == unload_type) return; // If we still match, do nothing
 
-		DoCommandP(CMD_MODIFY_ORDER, STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_UNLOAD | (unload_type << 4));
+		Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_UNLOAD | (unload_type << 4), {});
 
 		/* Transfer and unload orders with leave empty as default */
 		if (unload_type == OUFB_TRANSFER || unload_type == OUFB_UNLOAD) {
-			DoCommandP(CMD_MODIFY_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_LOAD | (OLFB_NO_LOAD << 4));
+			Command<CMD_MODIFY_ORDER>::Post(this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_LOAD | (OLFB_NO_LOAD << 4), {});
 			this->SetWidgetDirty(WID_O_FULL_LOAD);
 		}
 	}
@@ -669,7 +670,7 @@ private:
 		}
 
 		this->SetWidgetDirty(WID_O_NON_STOP);
-		DoCommandP(CMD_MODIFY_ORDER, STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_NON_STOP | non_stop << 4);
+		Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel_ord << 20), MOF_NON_STOP | non_stop << 4, {});
 	}
 
 	/**
@@ -682,8 +683,8 @@ private:
 		if (_ctrl_pressed && this->vehicle->cur_implicit_order_index == this->OrderGetSel()) return;
 		if (this->vehicle->GetNumOrders() <= 1) return;
 
-		DoCommandP(CMD_SKIP_TO_ORDER, _ctrl_pressed ? STR_ERROR_CAN_T_SKIP_TO_ORDER : STR_ERROR_CAN_T_SKIP_ORDER,
-				this->vehicle->tile, this->vehicle->index, _ctrl_pressed ? this->OrderGetSel() : ((this->vehicle->cur_implicit_order_index + 1) % this->vehicle->GetNumOrders()));
+		Command<CMD_SKIP_TO_ORDER>::Post(_ctrl_pressed ? STR_ERROR_CAN_T_SKIP_TO_ORDER : STR_ERROR_CAN_T_SKIP_ORDER,
+				this->vehicle->tile, this->vehicle->index, _ctrl_pressed ? this->OrderGetSel() : ((this->vehicle->cur_implicit_order_index + 1) % this->vehicle->GetNumOrders()), {});
 	}
 
 	/**
@@ -694,7 +695,7 @@ private:
 		/* When networking, move one order lower */
 		int selected = this->selected_order + (int)_networking;
 
-		if (DoCommandP(CMD_DELETE_ORDER, STR_ERROR_CAN_T_DELETE_THIS_ORDER, this->vehicle->tile, this->vehicle->index, this->OrderGetSel())) {
+		if (Command<CMD_DELETE_ORDER>::Post(STR_ERROR_CAN_T_DELETE_THIS_ORDER, this->vehicle->tile, this->vehicle->index, this->OrderGetSel(), {})) {
 			this->selected_order = selected >= this->vehicle->GetNumOrders() ? -1 : selected;
 			this->UpdateButtonState();
 		}
@@ -719,7 +720,7 @@ private:
 		/* Get another vehicle that share orders with this vehicle. */
 		Vehicle *other_shared = (this->vehicle->FirstShared() == this->vehicle) ? this->vehicle->NextShared() : this->vehicle->PreviousShared();
 		/* Copy the order list of the other vehicle. */
-		if (DoCommandP(CMD_CLONE_ORDER, STR_ERROR_CAN_T_STOP_SHARING_ORDER_LIST, this->vehicle->tile, this->vehicle->index | CO_COPY << 30, other_shared->index)) {
+		if (Command<CMD_CLONE_ORDER>::Post(STR_ERROR_CAN_T_STOP_SHARING_ORDER_LIST, this->vehicle->tile, this->vehicle->index | CO_COPY << 30, other_shared->index, {})) {
 			this->UpdateButtonState();
 		}
 	}
@@ -734,10 +735,10 @@ private:
 	{
 		if (_ctrl_pressed) {
 			/* Cancel refitting */
-			DoCommandP(CMD_ORDER_REFIT, this->vehicle->tile, this->vehicle->index, (this->OrderGetSel() << 16) | (CT_NO_REFIT << 8) | CT_NO_REFIT);
+			Command<CMD_ORDER_REFIT>::Post(this->vehicle->tile, this->vehicle->index, (this->OrderGetSel() << 16) | (CT_NO_REFIT << 8) | CT_NO_REFIT, {});
 		} else {
 			if (i == 1) { // Auto-refit to available cargo type.
-				DoCommandP(CMD_ORDER_REFIT, this->vehicle->tile, this->vehicle->index, (this->OrderGetSel() << 16) | CT_AUTO_REFIT);
+				Command<CMD_ORDER_REFIT>::Post(this->vehicle->tile, this->vehicle->index, (this->OrderGetSel() << 16) | CT_AUTO_REFIT, {});
 			} else {
 				ShowVehicleRefitWindow(this->vehicle, this->OrderGetSel(), this, auto_refit);
 			}
@@ -1159,7 +1160,7 @@ public:
 						order.index = 0;
 						order.MakeConditional(order_id);
 
-						DoCommandP(CMD_INSERT_ORDER, STR_ERROR_CAN_T_INSERT_NEW_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), order.Pack());
+						Command<CMD_INSERT_ORDER>::Post(STR_ERROR_CAN_T_INSERT_NEW_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), order.Pack(), {});
 					}
 					ResetObjectToPlace();
 					break;
@@ -1182,9 +1183,9 @@ public:
 					this->selected_order = -1;
 				} else if (sel == this->selected_order) {
 					if (this->vehicle->type == VEH_TRAIN && sel < this->vehicle->GetNumOrders()) {
-						DoCommandP(CMD_MODIFY_ORDER, STR_ERROR_CAN_T_MODIFY_THIS_ORDER,
+						Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER,
 								this->vehicle->tile, this->vehicle->index + (sel << 20),
-								MOF_STOP_LOCATION | ((this->vehicle->GetOrder(sel)->GetStopLocation() + 1) % OSL_END) << 4);
+								MOF_STOP_LOCATION | ((this->vehicle->GetOrder(sel)->GetStopLocation() + 1) % OSL_END) << 4, {});
 					}
 				} else {
 					/* Select clicked order */
@@ -1331,7 +1332,7 @@ public:
 				default:
 					break;
 			}
-			DoCommandP(CMD_MODIFY_ORDER, STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel << 20), MOF_COND_VALUE | Clamp(value, 0, 2047) << 4);
+			Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (sel << 20), MOF_COND_VALUE | Clamp(value, 0, 2047) << 4, {});
 		}
 	}
 
@@ -1369,11 +1370,11 @@ public:
 				break;
 
 			case WID_O_COND_VARIABLE:
-				DoCommandP(CMD_MODIFY_ORDER, STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), MOF_COND_VARIABLE | index << 4);
+				Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), MOF_COND_VARIABLE | index << 4, {});
 				break;
 
 			case WID_O_COND_COMPARATOR:
-				DoCommandP(CMD_MODIFY_ORDER, STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), MOF_COND_COMPARATOR | index << 4);
+				Command<CMD_MODIFY_ORDER>::Post(STR_ERROR_CAN_T_MODIFY_THIS_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), MOF_COND_COMPARATOR | index << 4, {});
 				break;
 		}
 	}
@@ -1386,7 +1387,7 @@ public:
 				VehicleOrderID to_order = this->GetOrderFromPt(pt.y);
 
 				if (!(from_order == to_order || from_order == INVALID_VEH_ORDER_ID || from_order > this->vehicle->GetNumOrders() || to_order == INVALID_VEH_ORDER_ID || to_order > this->vehicle->GetNumOrders()) &&
-						DoCommandP(CMD_MOVE_ORDER, STR_ERROR_CAN_T_MOVE_THIS_ORDER, this->vehicle->tile, this->vehicle->index, from_order | (to_order << 16))) {
+						Command<CMD_MOVE_ORDER>::Post(STR_ERROR_CAN_T_MOVE_THIS_ORDER, this->vehicle->tile, this->vehicle->index, from_order | (to_order << 16), {})) {
 					this->selected_order = -1;
 					this->UpdateButtonState();
 				}
@@ -1438,7 +1439,7 @@ public:
 			const Order cmd = GetOrderCmdFromTile(this->vehicle, tile);
 			if (cmd.IsType(OT_NOTHING)) return;
 
-			if (DoCommandP(CMD_INSERT_ORDER, STR_ERROR_CAN_T_INSERT_NEW_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), cmd.Pack())) {
+			if (Command<CMD_INSERT_ORDER>::Post(STR_ERROR_CAN_T_INSERT_NEW_ORDER, this->vehicle->tile, this->vehicle->index + (this->OrderGetSel() << 20), cmd.Pack(), {})) {
 				/* With quick goto the Go To button stays active */
 				if (!_settings_client.gui.quick_goto) ResetObjectToPlace();
 			}
@@ -1455,8 +1456,8 @@ public:
 		bool share_order = _ctrl_pressed || this->goto_type == OPOS_SHARE;
 		if (this->vehicle->GetNumOrders() != 0 && !share_order) return false;
 
-		if (DoCommandP(CMD_CLONE_ORDER, share_order ? STR_ERROR_CAN_T_SHARE_ORDER_LIST : STR_ERROR_CAN_T_COPY_ORDER_LIST,
-				this->vehicle->tile, this->vehicle->index | (share_order ? CO_SHARE : CO_COPY) << 30, v->index)) {
+		if (Command<CMD_CLONE_ORDER>::Post(share_order ? STR_ERROR_CAN_T_SHARE_ORDER_LIST : STR_ERROR_CAN_T_COPY_ORDER_LIST,
+				this->vehicle->tile, this->vehicle->index | (share_order ? CO_SHARE : CO_COPY) << 30, v->index, {})) {
 			this->selected_order = -1;
 			ResetObjectToPlace();
 		}
diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -39,6 +39,7 @@
 #include "station_cmd.h"
 #include "tunnelbridge_cmd.h"
 #include "waypoint_cmd.h"
+#include "rail_cmd.h"
 
 #include "station_map.h"
 #include "tunnelbridge_map.h"
@@ -95,10 +96,13 @@ void CcPlaySound_CONSTRUCTION_RAIL(const
 
 static void GenericPlaceRail(TileIndex tile, int cmd)
 {
-	DoCommandP(_remove_button_clicked ? CMD_REMOVE_SINGLE_RAIL : CMD_BUILD_SINGLE_RAIL,
-			_remove_button_clicked ? STR_ERROR_CAN_T_REMOVE_RAILROAD_TRACK : STR_ERROR_CAN_T_BUILD_RAILROAD_TRACK,
-			CcPlaySound_CONSTRUCTION_RAIL,
-			tile, _cur_railtype, cmd | (_settings_client.gui.auto_remove_signals << 3));
+	if (_remove_button_clicked) {
+		Command<CMD_REMOVE_SINGLE_RAIL>::Post(STR_ERROR_CAN_T_REMOVE_RAILROAD_TRACK, CcPlaySound_CONSTRUCTION_RAIL,
+				tile, _cur_railtype, cmd | (_settings_client.gui.auto_remove_signals << 3), {});
+	} else {
+		Command<CMD_BUILD_SINGLE_RAIL>::Post(STR_ERROR_CAN_T_BUILD_RAILROAD_TRACK, CcPlaySound_CONSTRUCTION_RAIL,
+				tile, _cur_railtype, cmd | (_settings_client.gui.auto_remove_signals << 3), {});
+	}
 }
 
 /**
@@ -114,7 +118,7 @@ static void PlaceExtraDepotRail(TileInde
 	if (GetRailTileType(tile) == RAIL_TILE_SIGNALS && !_settings_client.gui.auto_remove_signals) return;
 	if ((GetTrackBits(tile) & DiagdirReachesTracks(dir)) == 0) return;
 
-	DoCommandP(CMD_BUILD_SINGLE_RAIL, tile, _cur_railtype, track | (_settings_client.gui.auto_remove_signals << 3));
+	Command<CMD_BUILD_SINGLE_RAIL>::Post(tile, _cur_railtype, track | (_settings_client.gui.auto_remove_signals << 3), {});
 }
 
 /** Additional pieces of track to add at the entrance of a depot. */
@@ -168,7 +172,7 @@ static void PlaceRail_Waypoint(TileIndex
 	} else {
 		/* Tile where we can't build rail waypoints. This is always going to fail,
 		 * but provides the user with a proper error message. */
-		DoCommandP(CMD_BUILD_RAIL_WAYPOINT, STR_ERROR_CAN_T_BUILD_TRAIN_WAYPOINT, tile, 1 << 8 | 1 << 16, STAT_CLASS_WAYP | INVALID_STATION << 16);
+		Command<CMD_BUILD_RAIL_WAYPOINT>::Post(STR_ERROR_CAN_T_BUILD_TRAIN_WAYPOINT, tile, 1 << 8 | 1 << 16, STAT_CLASS_WAYP | INVALID_STATION << 16, {});
 	}
 }
 
@@ -208,7 +212,7 @@ static void PlaceRail_Station(TileIndex 
 				uint32 p2_final = p2;
 				if (to_join != INVALID_STATION) SB(p2_final, 16, 16, to_join);
 
-				return DoCommandP(CMD_BUILD_RAIL_STATION, STR_ERROR_CAN_T_BUILD_RAILROAD_STATION, CcStation, tile, p1, p2_final);
+				return Command<CMD_BUILD_RAIL_STATION>::Post(STR_ERROR_CAN_T_BUILD_RAILROAD_STATION, CcStation, tile, p1, p2_final, {});
 			}
 		};
 
@@ -236,7 +240,7 @@ static void GenericPlaceSignals(TileInde
 	Track track = FindFirstTrack(trackbits);
 
 	if (_remove_button_clicked) {
-		DoCommandP(CMD_REMOVE_SIGNALS, STR_ERROR_CAN_T_REMOVE_SIGNALS_FROM, CcPlaySound_CONSTRUCTION_RAIL,  tile, track, 0);
+		Command<CMD_REMOVE_SIGNALS>::Post(STR_ERROR_CAN_T_REMOVE_SIGNALS_FROM, CcPlaySound_CONSTRUCTION_RAIL, tile, track, 0, {});
 	} else {
 		const Window *w = FindWindowById(WC_BUILD_SIGNAL, 0);
 
@@ -267,8 +271,8 @@ static void GenericPlaceSignals(TileInde
 			SB(p1, 9, 6, cycle_types);
 		}
 
-		DoCommandP(CMD_BUILD_SIGNALS, (w != nullptr && _convert_signal_button) ? STR_ERROR_SIGNAL_CAN_T_CONVERT_SIGNALS_HERE : STR_ERROR_CAN_T_BUILD_SIGNALS_HERE,
-				CcPlaySound_CONSTRUCTION_RAIL, tile, p1, 0);
+		Command<CMD_BUILD_SIGNALS>::Post((w != nullptr && _convert_signal_button) ? STR_ERROR_SIGNAL_CAN_T_CONVERT_SIGNALS_HERE : STR_ERROR_CAN_T_BUILD_SIGNALS_HERE,
+				CcPlaySound_CONSTRUCTION_RAIL, tile, p1, 0, {});
 	}
 }
 
@@ -370,10 +374,13 @@ static void BuildRailClick_Remove(Window
 static void DoRailroadTrack(int mode)
 {
 	uint32 p2 = _cur_railtype | (mode << 6) | (_settings_client.gui.auto_remove_signals << 11);
-	DoCommandP(_remove_button_clicked ? CMD_REMOVE_RAILROAD_TRACK : CMD_BUILD_RAILROAD_TRACK,
-			_remove_button_clicked ? STR_ERROR_CAN_T_REMOVE_RAILROAD_TRACK : STR_ERROR_CAN_T_BUILD_RAILROAD_TRACK,
-			CcPlaySound_CONSTRUCTION_RAIL,
-			TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), p2);
+	if (_remove_button_clicked) {
+		Command<CMD_REMOVE_RAILROAD_TRACK>::Post(STR_ERROR_CAN_T_REMOVE_RAILROAD_TRACK, CcPlaySound_CONSTRUCTION_RAIL,
+				TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), p2, {});
+	} else {
+		Command<CMD_BUILD_RAILROAD_TRACK>::Post(STR_ERROR_CAN_T_BUILD_RAILROAD_TRACK, CcPlaySound_CONSTRUCTION_RAIL,
+				TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), p2, {});
+	}
 }
 
 static void HandleAutodirPlacement()
@@ -424,10 +431,13 @@ static void HandleAutoSignalPlacement()
 
 	/* _settings_client.gui.drag_signals_density is given as a parameter such that each user
 	 * in a network game can specify their own signal density */
-	DoCommandP(_remove_button_clicked ? CMD_REMOVE_SIGNAL_TRACK : CMD_BUILD_SIGNAL_TRACK,
-			_remove_button_clicked ? STR_ERROR_CAN_T_REMOVE_SIGNALS_FROM : STR_ERROR_CAN_T_BUILD_SIGNALS_HERE,
-			CcPlaySound_CONSTRUCTION_RAIL,
-			TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), p2);
+	if (_remove_button_clicked) {
+		Command<CMD_REMOVE_SIGNAL_TRACK>::Post(STR_ERROR_CAN_T_REMOVE_SIGNALS_FROM, CcPlaySound_CONSTRUCTION_RAIL,
+				TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), p2, {});
+	} else {
+		Command<CMD_BUILD_SIGNAL_TRACK>::Post(STR_ERROR_CAN_T_BUILD_SIGNALS_HERE, CcPlaySound_CONSTRUCTION_RAIL,
+				TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), p2, {});
+	}
 }
 
 
@@ -653,8 +663,7 @@ struct BuildRailToolbarWindow : Window {
 				break;
 
 			case WID_RAT_BUILD_DEPOT:
-				DoCommandP(CMD_BUILD_TRAIN_DEPOT, STR_ERROR_CAN_T_BUILD_TRAIN_DEPOT,
-						CcRailDepot, tile, _cur_railtype, _build_depot_direction);
+				Command<CMD_BUILD_TRAIN_DEPOT>::Post(STR_ERROR_CAN_T_BUILD_TRAIN_DEPOT, CcRailDepot, tile, _cur_railtype, _build_depot_direction, {});
 				break;
 
 			case WID_RAT_BUILD_WAYPOINT:
@@ -674,7 +683,7 @@ struct BuildRailToolbarWindow : Window {
 				break;
 
 			case WID_RAT_BUILD_TUNNEL:
-				DoCommandP(CMD_BUILD_TUNNEL, STR_ERROR_CAN_T_BUILD_TUNNEL_HERE, CcBuildRailTunnel, tile, _cur_railtype | (TRANSPORT_RAIL << 8), 0);
+				Command<CMD_BUILD_TUNNEL>::Post(STR_ERROR_CAN_T_BUILD_TUNNEL_HERE, CcBuildRailTunnel, tile, _cur_railtype | (TRANSPORT_RAIL << 8), 0, {});
 				break;
 
 			case WID_RAT_CONVERT_RAIL:
@@ -716,7 +725,7 @@ struct BuildRailToolbarWindow : Window {
 					break;
 
 				case DDSP_CONVERT_RAIL:
-					DoCommandP(CMD_CONVERT_RAIL, STR_ERROR_CAN_T_CONVERT_RAIL, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, _cur_railtype | (_ctrl_pressed ? 1 << 6 : 0));
+					Command<CMD_CONVERT_RAIL>::Post(STR_ERROR_CAN_T_CONVERT_RAIL, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, _cur_railtype | (_ctrl_pressed ? 1 << 6 : 0), {});
 					break;
 
 				case DDSP_REMOVE_STATION:
@@ -724,14 +733,14 @@ struct BuildRailToolbarWindow : Window {
 					if (this->IsWidgetLowered(WID_RAT_BUILD_STATION)) {
 						/* Station */
 						if (_remove_button_clicked) {
-							DoCommandP(CMD_REMOVE_FROM_RAIL_STATION, STR_ERROR_CAN_T_REMOVE_PART_OF_STATION, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, _ctrl_pressed ? 0 : 1);
+							Command<CMD_REMOVE_FROM_RAIL_STATION>::Post(STR_ERROR_CAN_T_REMOVE_PART_OF_STATION, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, _ctrl_pressed ? 0 : 1, {});
 						} else {
 							HandleStationPlacement(start_tile, end_tile);
 						}
 					} else {
 						/* Waypoint */
 						if (_remove_button_clicked) {
-							DoCommandP(CMD_REMOVE_FROM_RAIL_WAYPOINT, STR_ERROR_CAN_T_REMOVE_TRAIN_WAYPOINT, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, _ctrl_pressed ? 0 : 1);
+							Command<CMD_REMOVE_FROM_RAIL_WAYPOINT>::Post(STR_ERROR_CAN_T_REMOVE_TRAIN_WAYPOINT, CcPlaySound_CONSTRUCTION_RAIL, end_tile, start_tile, _ctrl_pressed ? 0 : 1, {});
 						} else {
 							TileArea ta(start_tile, end_tile);
 							uint32 p1 = _cur_railtype | (select_method == VPM_X_LIMITED ? AXIS_X : AXIS_Y) << 6 | ta.w << 8 | ta.h << 16 | _ctrl_pressed << 24;
@@ -744,7 +753,7 @@ struct BuildRailToolbarWindow : Window {
 									uint32 p2_final = p2;
 									if (to_join != INVALID_STATION) SB(p2_final, 16, 16, to_join);
 
-									return DoCommandP(CMD_BUILD_RAIL_WAYPOINT, STR_ERROR_CAN_T_BUILD_TRAIN_WAYPOINT, CcPlaySound_CONSTRUCTION_RAIL, ta.tile, p1, p2_final);
+									return Command<CMD_BUILD_RAIL_WAYPOINT>::Post(STR_ERROR_CAN_T_BUILD_TRAIN_WAYPOINT, CcPlaySound_CONSTRUCTION_RAIL, ta.tile, p1, p2_final, {});
 								}
 							};
 
@@ -913,7 +922,7 @@ static void HandleStationPlacement(TileI
 			uint32 p2_final = p2;
 			if (to_join != INVALID_STATION) SB(p2_final, 16, 16, to_join);
 
-			return DoCommandP(CMD_BUILD_RAIL_STATION, STR_ERROR_CAN_T_BUILD_RAILROAD_STATION, CcStation, ta.tile, p1, p2_final);
+			return Command<CMD_BUILD_RAIL_STATION>::Post(STR_ERROR_CAN_T_BUILD_RAILROAD_STATION, CcStation, ta.tile, p1, p2_final, {});
 		}
 	};
 
diff --git a/src/road_gui.cpp b/src/road_gui.cpp
--- a/src/road_gui.cpp
+++ b/src/road_gui.cpp
@@ -32,6 +32,7 @@
 #include "core/geometry_func.hpp"
 #include "date_func.h"
 #include "station_cmd.h"
+#include "road_cmd.h"
 #include "tunnelbridge_cmd.h"
 
 #include "widgets/road_widget.h"
@@ -127,7 +128,7 @@ void ConnectRoadToStructure(TileIndex ti
 	/* if there is a roadpiece just outside of the station entrance, build a connecting route */
 	if (IsNormalRoadTile(tile)) {
 		if (GetRoadBits(tile, GetRoadTramType(_cur_roadtype)) != ROAD_NONE) {
-			DoCommandP(CMD_BUILD_ROAD, tile, _cur_roadtype << 4 | DiagDirToRoadBits(ReverseDiagDir(direction)), 0);
+			Command<CMD_BUILD_ROAD>::Post(tile, _cur_roadtype << 4 | DiagDirToRoadBits(ReverseDiagDir(direction)), 0, {});
 		}
 	}
 }
@@ -205,7 +206,7 @@ static void PlaceRoadStop(TileIndex star
 			uint32 p2_final = p2;
 			if (to_join != INVALID_STATION) SB(p2_final, 16, 16, to_join);
 
-			return DoCommandP(CMD_BUILD_ROAD_STOP, err_msg, CcRoadStop, ta.tile, p1, p2_final);
+			return Command<CMD_BUILD_ROAD_STOP>::Post(err_msg, CcRoadStop, ta.tile, p1, p2_final, {});
 		}
 	};
 
@@ -566,8 +567,8 @@ struct BuildRoadToolbarWindow : Window {
 				break;
 
 			case WID_ROT_DEPOT:
-				DoCommandP(CMD_BUILD_ROAD_DEPOT, this->rti->strings.err_depot, CcRoadDepot,
-						tile, _cur_roadtype << 2 | _road_depot_orientation, 0);
+				Command<CMD_BUILD_ROAD_DEPOT>::Post(this->rti->strings.err_depot, CcRoadDepot,
+						tile, _cur_roadtype << 2 | _road_depot_orientation, 0, {});
 				break;
 
 			case WID_ROT_BUS_STATION:
@@ -583,8 +584,8 @@ struct BuildRoadToolbarWindow : Window {
 				break;
 
 			case WID_ROT_BUILD_TUNNEL:
-				DoCommandP(CMD_BUILD_TUNNEL, STR_ERROR_CAN_T_BUILD_TUNNEL_HERE, CcBuildRoadTunnel,
-						tile, _cur_roadtype | (TRANSPORT_ROAD << 8), 0);
+				Command<CMD_BUILD_TUNNEL>::Post(STR_ERROR_CAN_T_BUILD_TUNNEL_HERE, CcBuildRoadTunnel,
+						tile, _cur_roadtype | (TRANSPORT_ROAD << 8), 0, {});
 				break;
 
 			case WID_ROT_CONVERT_ROAD:
@@ -685,9 +686,13 @@ struct BuildRoadToolbarWindow : Window {
 					 * flags */
 					_place_road_flag = (RoadFlags)((_place_road_flag & RF_DIR_Y) ? (_place_road_flag & 0x07) : (_place_road_flag >> 3));
 
-					DoCommandP(_remove_button_clicked ? CMD_REMOVE_LONG_ROAD : CMD_BUILD_LONG_ROAD,
-							_remove_button_clicked ? this->rti->strings.err_remove_road : this->rti->strings.err_build_road, CcPlaySound_CONSTRUCTION_OTHER,
-							start_tile, end_tile, _place_road_flag | (_cur_roadtype << 3) | (_one_way_button_clicked << 10));
+					if (_remove_button_clicked) {
+						Command<CMD_REMOVE_LONG_ROAD>::Post(this->rti->strings.err_remove_road, CcPlaySound_CONSTRUCTION_OTHER,
+								start_tile, end_tile, _place_road_flag | (_cur_roadtype << 3) | (_one_way_button_clicked << 10), {});
+					} else {
+						Command<CMD_BUILD_LONG_ROAD>::Post(this->rti->strings.err_build_road, CcPlaySound_CONSTRUCTION_OTHER,
+								start_tile, end_tile, _place_road_flag | (_cur_roadtype << 3) | (_one_way_button_clicked << 10), {});
+					}
 					break;
 
 				case DDSP_BUILD_BUSSTOP:
@@ -695,7 +700,7 @@ struct BuildRoadToolbarWindow : Window {
 					if (this->IsWidgetLowered(WID_ROT_BUS_STATION)) {
 						if (_remove_button_clicked) {
 							TileArea ta(start_tile, end_tile);
-							DoCommandP(CMD_REMOVE_ROAD_STOP, this->rti->strings.err_remove_station[ROADSTOP_BUS], CcPlaySound_CONSTRUCTION_OTHER, ta.tile, ta.w | ta.h << 8, (_ctrl_pressed << 1) | ROADSTOP_BUS);
+							Command<CMD_REMOVE_ROAD_STOP>::Post(this->rti->strings.err_remove_station[ROADSTOP_BUS], CcPlaySound_CONSTRUCTION_OTHER, ta.tile, ta.w | ta.h << 8, (_ctrl_pressed << 1) | ROADSTOP_BUS, {});
 						} else {
 							PlaceRoadStop(start_tile, end_tile, _cur_roadtype << 5 | (_ctrl_pressed << 2) | ROADSTOP_BUS, this->rti->strings.err_build_station[ROADSTOP_BUS]);
 						}
@@ -707,7 +712,7 @@ struct BuildRoadToolbarWindow : Window {
 					if (this->IsWidgetLowered(WID_ROT_TRUCK_STATION)) {
 						if (_remove_button_clicked) {
 							TileArea ta(start_tile, end_tile);
-							DoCommandP(CMD_REMOVE_ROAD_STOP, this->rti->strings.err_remove_station[ROADSTOP_TRUCK], CcPlaySound_CONSTRUCTION_OTHER, ta.tile, ta.w | ta.h << 8, (_ctrl_pressed << 1) | ROADSTOP_TRUCK);
+							Command<CMD_REMOVE_ROAD_STOP>::Post(this->rti->strings.err_remove_station[ROADSTOP_TRUCK], CcPlaySound_CONSTRUCTION_OTHER, ta.tile, ta.w | ta.h << 8, (_ctrl_pressed << 1) | ROADSTOP_TRUCK, {});
 						} else {
 							PlaceRoadStop(start_tile, end_tile, _cur_roadtype << 5 | (_ctrl_pressed << 2) | ROADSTOP_TRUCK, this->rti->strings.err_build_station[ROADSTOP_TRUCK]);
 						}
@@ -715,7 +720,7 @@ struct BuildRoadToolbarWindow : Window {
 					break;
 
 				case DDSP_CONVERT_ROAD:
-					DoCommandP(CMD_CONVERT_ROAD, rti->strings.err_convert_road, CcPlaySound_CONSTRUCTION_OTHER, end_tile, start_tile, _cur_roadtype);
+					Command<CMD_CONVERT_ROAD>::Post(rti->strings.err_convert_road, CcPlaySound_CONSTRUCTION_OTHER, end_tile, start_tile, _cur_roadtype, {});
 					break;
 			}
 		}
diff --git a/src/settings.cpp b/src/settings.cpp
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1550,7 +1550,7 @@ bool SetSettingValue(const IntSettingDes
 	const IntSettingDesc *setting = sd->AsIntSetting();
 	if ((setting->flags & SF_PER_COMPANY) != 0) {
 		if (Company::IsValidID(_local_company) && _game_mode != GM_MENU) {
-			return DoCommandP(CMD_CHANGE_COMPANY_SETTING, 0, 0, value, setting->GetName());
+			return Command<CMD_CHANGE_COMPANY_SETTING>::Post(0, 0, value, setting->GetName());
 		}
 
 		setting->ChangeValue(&_settings_client.company, value);
@@ -1576,7 +1576,7 @@ bool SetSettingValue(const IntSettingDes
 
 	/* send non-company-based settings over the network */
 	if (!_networking || (_networking && _network_server)) {
-		return DoCommandP(CMD_CHANGE_SETTING, 0, 0, value, setting->GetName());
+		return Command<CMD_CHANGE_SETTING>::Post(0, 0, value, setting->GetName());
 	}
 	return false;
 }
diff --git a/src/signs_cmd.cpp b/src/signs_cmd.cpp
--- a/src/signs_cmd.cpp
+++ b/src/signs_cmd.cpp
@@ -132,5 +132,5 @@ void CcPlaceSign(const CommandCost &resu
  */
 void PlaceProc_Sign(TileIndex tile)
 {
-	DoCommandP(CMD_PLACE_SIGN, STR_ERROR_CAN_T_PLACE_SIGN_HERE, CcPlaceSign, tile, 0, 0);
+	Command<CMD_PLACE_SIGN>::Post(STR_ERROR_CAN_T_PLACE_SIGN_HERE, CcPlaceSign, tile, 0, 0, {});
 }
diff --git a/src/signs_gui.cpp b/src/signs_gui.cpp
--- a/src/signs_gui.cpp
+++ b/src/signs_gui.cpp
@@ -26,6 +26,7 @@
 #include "hotkeys.h"
 #include "transparency.h"
 #include "gui.h"
+#include "signs_cmd.h"
 
 #include "widgets/sign_widget.h"
 
@@ -413,7 +414,7 @@ Window *ShowSignList()
 static bool RenameSign(SignID index, const char *text)
 {
 	bool remove = StrEmpty(text);
-	DoCommandP(CMD_RENAME_SIGN, StrEmpty(text) ? STR_ERROR_CAN_T_DELETE_SIGN : STR_ERROR_CAN_T_CHANGE_SIGN_NAME, 0, index, 0, text);
+	Command<CMD_RENAME_SIGN>::Post(StrEmpty(text) ? STR_ERROR_CAN_T_DELETE_SIGN : STR_ERROR_CAN_T_CHANGE_SIGN_NAME, 0, index, 0, text);
 	return remove;
 }
 
diff --git a/src/station_gui.cpp b/src/station_gui.cpp
--- a/src/station_gui.cpp
+++ b/src/station_gui.cpp
@@ -31,6 +31,7 @@
 #include "town.h"
 #include "linkgraph/linkgraph.h"
 #include "zoom_func.h"
+#include "station_cmd.h"
 
 #include "widgets/station_widget.h"
 
@@ -1947,7 +1948,7 @@ struct StationViewWindow : public Window
 				break;
 
 			case WID_SV_CLOSE_AIRPORT:
-				DoCommandP(CMD_OPEN_CLOSE_AIRPORT, 0, this->window_number, 0);
+				Command<CMD_OPEN_CLOSE_AIRPORT>::Post(0, this->window_number, 0, {});
 				break;
 
 			case WID_SV_TRAINS:   // Show list of scheduled trains to this station
@@ -2084,7 +2085,7 @@ struct StationViewWindow : public Window
 	{
 		if (str == nullptr) return;
 
-		DoCommandP(CMD_RENAME_STATION, STR_ERROR_CAN_T_RENAME_STATION, 0, this->window_number, 0, str);
+		Command<CMD_RENAME_STATION>::Post(STR_ERROR_CAN_T_RENAME_STATION, 0, this->window_number, 0, str);
 	}
 
 	void OnResize() override
diff --git a/src/story_gui.cpp b/src/story_gui.cpp
--- a/src/story_gui.cpp
+++ b/src/story_gui.cpp
@@ -25,6 +25,7 @@
 #include "company_base.h"
 #include "tilehighlight_func.h"
 #include "vehicle_base.h"
+#include "story_cmd.h"
 
 #include "widgets/story_widget.h"
 
@@ -566,7 +567,7 @@ protected:
 				this->SetTimeout();
 				this->SetWidgetDirty(WID_SB_PAGE_PANEL);
 
-				DoCommandP(CMD_STORY_PAGE_BUTTON, 0, pe.index, 0);
+				Command<CMD_STORY_PAGE_BUTTON>::Post(0, pe.index, 0, {});
 				break;
 
 			case SPET_BUTTON_TILE:
@@ -921,7 +922,7 @@ public:
 			return;
 		}
 
-		DoCommandP(CMD_STORY_PAGE_BUTTON, tile, pe->index, 0);
+		Command<CMD_STORY_PAGE_BUTTON>::Post(tile, pe->index, 0, {});
 		ResetObjectToPlace();
 	}
 
@@ -940,7 +941,7 @@ public:
 		VehicleType wanted_vehtype = data.GetVehicleType();
 		if (wanted_vehtype != VEH_INVALID && wanted_vehtype != v->type) return false;
 
-		DoCommandP(CMD_STORY_PAGE_BUTTON, 0, pe->index, v->index);
+		Command<CMD_STORY_PAGE_BUTTON>::Post(0, pe->index, v->index, {});
 		ResetObjectToPlace();
 		return true;
 	}
diff --git a/src/terraform_gui.cpp b/src/terraform_gui.cpp
--- a/src/terraform_gui.cpp
+++ b/src/terraform_gui.cpp
@@ -35,6 +35,8 @@
 #include "zoom_func.h"
 #include "rail_cmd.h"
 #include "landscape_cmd.h"
+#include "terraform_cmd.h"
+#include "object_cmd.h"
 
 #include "widgets/terraform_widget.h"
 
@@ -63,7 +65,7 @@ static void GenerateDesertArea(TileIndex
 	TileArea ta(start, end);
 	for (TileIndex tile : ta) {
 		SetTropicZone(tile, (_ctrl_pressed) ? TROPICZONE_NORMAL : TROPICZONE_DESERT);
-		DoCommandP(CMD_LANDSCAPE_CLEAR, tile, 0, 0);
+		Command<CMD_LANDSCAPE_CLEAR>::Post(tile, 0, 0, {});
 		MarkTileDirtyByTile(tile);
 	}
 	old_generating_world.Restore();
@@ -118,16 +120,16 @@ bool GUIPlaceProcDragXY(ViewportDragDrop
 
 	switch (proc) {
 		case DDSP_DEMOLISH_AREA:
-			DoCommandP(CMD_CLEAR_AREA, STR_ERROR_CAN_T_CLEAR_THIS_AREA, CcPlaySound_EXPLOSION, end_tile, start_tile, _ctrl_pressed ? 1 : 0);
+			Command<CMD_CLEAR_AREA>::Post(STR_ERROR_CAN_T_CLEAR_THIS_AREA, CcPlaySound_EXPLOSION, end_tile, start_tile, _ctrl_pressed ? 1 : 0, {});
 			break;
 		case DDSP_RAISE_AND_LEVEL_AREA:
-			DoCommandP(CMD_LEVEL_LAND, STR_ERROR_CAN_T_RAISE_LAND_HERE, CcTerraform, end_tile, start_tile, LM_RAISE << 1 | (_ctrl_pressed ? 1 : 0));
+			Command<CMD_LEVEL_LAND>::Post(STR_ERROR_CAN_T_RAISE_LAND_HERE, CcTerraform, end_tile, start_tile, LM_RAISE << 1 | (_ctrl_pressed ? 1 : 0), {});
 			break;
 		case DDSP_LOWER_AND_LEVEL_AREA:
-			DoCommandP(CMD_LEVEL_LAND, STR_ERROR_CAN_T_LOWER_LAND_HERE, CcTerraform, end_tile, start_tile, LM_LOWER << 1 | (_ctrl_pressed ? 1 : 0));
+			Command<CMD_LEVEL_LAND>::Post(STR_ERROR_CAN_T_LOWER_LAND_HERE, CcTerraform, end_tile, start_tile, LM_LOWER << 1 | (_ctrl_pressed ? 1 : 0), {});
 			break;
 		case DDSP_LEVEL_AREA:
-			DoCommandP(CMD_LEVEL_LAND, STR_ERROR_CAN_T_LEVEL_LAND_HERE, CcTerraform, end_tile, start_tile, LM_LEVEL << 1 | (_ctrl_pressed ? 1 : 0));
+			Command<CMD_LEVEL_LAND>::Post(STR_ERROR_CAN_T_LEVEL_LAND_HERE, CcTerraform, end_tile, start_tile, LM_LEVEL << 1 | (_ctrl_pressed ? 1 : 0), {});
 			break;
 		case DDSP_CREATE_ROCKS:
 			GenerateRockyArea(end_tile, start_tile);
@@ -241,7 +243,7 @@ struct TerraformToolbarWindow : Window {
 				break;
 
 			case WID_TT_BUY_LAND: // Buy land button
-				DoCommandP(CMD_BUILD_OBJECT, STR_ERROR_CAN_T_PURCHASE_THIS_LAND, CcPlaySound_CONSTRUCTION_RAIL, tile, OBJECT_OWNED_LAND, 0);
+				Command<CMD_BUILD_OBJECT>::Post(STR_ERROR_CAN_T_PURCHASE_THIS_LAND, CcPlaySound_CONSTRUCTION_RAIL, tile, OBJECT_OWNED_LAND, 0, {});
 				break;
 
 			case WID_TT_PLACE_SIGN: // Place sign button
@@ -398,7 +400,7 @@ static void CommonRaiseLowerBigLand(Tile
 		StringID msg =
 			mode ? STR_ERROR_CAN_T_RAISE_LAND_HERE : STR_ERROR_CAN_T_LOWER_LAND_HERE;
 
-		DoCommandP(CMD_TERRAFORM_LAND, msg, CcTerraform, tile, SLOPE_N, (uint32)mode);
+		Command<CMD_TERRAFORM_LAND>::Post(msg, CcTerraform, tile, SLOPE_N, (uint32)mode, {});
 	} else {
 		assert(_terraform_size != 0);
 		TileArea ta(tile, _terraform_size, _terraform_size);
@@ -425,7 +427,7 @@ static void CommonRaiseLowerBigLand(Tile
 
 		for (TileIndex tile2 : ta) {
 			if (TileHeight(tile2) == h) {
-				DoCommandP(CMD_TERRAFORM_LAND, tile2, SLOPE_N, (uint32)mode);
+				Command<CMD_TERRAFORM_LAND>::Post(tile2, SLOPE_N, (uint32)mode, {});
 			}
 		}
 	}
diff --git a/src/timetable_gui.cpp b/src/timetable_gui.cpp
--- a/src/timetable_gui.cpp
+++ b/src/timetable_gui.cpp
@@ -22,6 +22,7 @@
 #include "date_gui.h"
 #include "vehicle_gui.h"
 #include "settings_type.h"
+#include "timetable_cmd.h"
 
 #include "widgets/timetable_widget.h"
 
@@ -142,7 +143,7 @@ static void FillTimetableArrivalDepartur
  */
 static void ChangeTimetableStartCallback(const Window *w, Date date)
 {
-	DoCommandP(CMD_SET_TIMETABLE_START, STR_ERROR_CAN_T_TIMETABLE_VEHICLE, 0, w->window_number, date);
+	Command<CMD_SET_TIMETABLE_START>::Post(STR_ERROR_CAN_T_TIMETABLE_VEHICLE, 0, w->window_number, date, {});
 }
 
 
@@ -578,25 +579,25 @@ struct TimetableWindow : Window {
 
 			case WID_VT_CLEAR_TIME: { // Clear waiting time.
 				uint32 p1 = PackTimetableArgs(v, this->sel_index, false);
-				DoCommandP(CMD_CHANGE_TIMETABLE, STR_ERROR_CAN_T_TIMETABLE_VEHICLE, (TileIndex)0, p1, 0);
+				Command<CMD_CHANGE_TIMETABLE>::Post(STR_ERROR_CAN_T_TIMETABLE_VEHICLE, 0, p1, 0, {});
 				break;
 			}
 
 			case WID_VT_CLEAR_SPEED: { // Clear max speed button.
 				uint32 p1 = PackTimetableArgs(v, this->sel_index, true);
-				DoCommandP(CMD_CHANGE_TIMETABLE, STR_ERROR_CAN_T_TIMETABLE_VEHICLE, (TileIndex)0, p1, UINT16_MAX);
+				Command<CMD_CHANGE_TIMETABLE>::Post(STR_ERROR_CAN_T_TIMETABLE_VEHICLE, 0, p1, UINT16_MAX, {});
 				break;
 			}
 
 			case WID_VT_RESET_LATENESS: // Reset the vehicle's late counter.
-				DoCommandP(CMD_SET_VEHICLE_ON_TIME, STR_ERROR_CAN_T_TIMETABLE_VEHICLE, (TileIndex)0, v->index, 0);
+				Command<CMD_SET_VEHICLE_ON_TIME>::Post(STR_ERROR_CAN_T_TIMETABLE_VEHICLE, 0, v->index, 0, {});
 				break;
 
 			case WID_VT_AUTOFILL: { // Autofill the timetable.
 				uint32 p2 = 0;
 				if (!HasBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE)) SetBit(p2, 0);
 				if (_ctrl_pressed) SetBit(p2, 1);
-				DoCommandP(CMD_AUTOFILL_TIMETABLE, STR_ERROR_CAN_T_TIMETABLE_VEHICLE, (TileIndex)0, v->index, p2);
+				Command<CMD_AUTOFILL_TIMETABLE>::Post(STR_ERROR_CAN_T_TIMETABLE_VEHICLE, 0, v->index, p2, {});
 				break;
 			}
 
@@ -629,7 +630,7 @@ struct TimetableWindow : Window {
 
 		uint32 p2 = std::min<uint32>(val, UINT16_MAX);
 
-		DoCommandP(CMD_CHANGE_TIMETABLE, STR_ERROR_CAN_T_TIMETABLE_VEHICLE, 0, p1, p2);
+		Command<CMD_CHANGE_TIMETABLE>::Post(STR_ERROR_CAN_T_TIMETABLE_VEHICLE, 0, p1, p2, {});
 	}
 
 	void OnResize() override
diff --git a/src/toolbar_gui.cpp b/src/toolbar_gui.cpp
--- a/src/toolbar_gui.cpp
+++ b/src/toolbar_gui.cpp
@@ -49,6 +49,7 @@
 #include "framerate_type.h"
 #include "guitimer_func.h"
 #include "screenshot_gui.h"
+#include "misc_cmd.h"
 
 #include "widgets/toolbar_widget.h"
 
@@ -265,7 +266,7 @@ static CallBackFunction ToolbarPauseClic
 {
 	if (_networking && !_network_server) return CBF_NONE; // only server can pause the game
 
-	if (DoCommandP(CMD_PAUSE, 0, PM_PAUSED_NORMAL, _pause_mode == PM_UNPAUSED)) {
+	if (Command<CMD_PAUSE>::Post(0, PM_PAUSED_NORMAL, _pause_mode == PM_UNPAUSED, {})) {
 		if (_settings_client.sound.confirm) SndPlayFx(SND_15_BEEP);
 	}
 	return CBF_NONE;
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -33,6 +33,7 @@
 #include "stringfilter_type.h"
 #include "widgets/dropdown_func.h"
 #include "town_kdtree.h"
+#include "town_cmd.h"
 
 #include "widgets/town_widget.h"
 
@@ -287,7 +288,7 @@ public:
 			}
 
 			case WID_TA_EXECUTE:
-				DoCommandP(CMD_DO_TOWN_ACTION, STR_ERROR_CAN_T_DO_THIS, this->town->xy, this->window_number, this->sel_index);
+				Command<CMD_DO_TOWN_ACTION>::Post(STR_ERROR_CAN_T_DO_THIS, this->town->xy, this->window_number, this->sel_index, {});
 				break;
 		}
 	}
@@ -474,12 +475,12 @@ public:
 					_warn_town_no_roads = true;
 				}
 
-				DoCommandP(CMD_EXPAND_TOWN, STR_ERROR_CAN_T_EXPAND_TOWN, (TileIndex)0, this->window_number, 0);
+				Command<CMD_EXPAND_TOWN>::Post(STR_ERROR_CAN_T_EXPAND_TOWN, 0, this->window_number, 0, {});
 				break;
 			}
 
 			case WID_TV_DELETE: // delete town - only available on Scenario editor
-				DoCommandP(CMD_DELETE_TOWN, STR_ERROR_TOWN_CAN_T_DELETE, (TileIndex)0, this->window_number, 0);
+				Command<CMD_DELETE_TOWN>::Post(STR_ERROR_TOWN_CAN_T_DELETE, 0, this->window_number, 0, {});
 				break;
 		}
 	}
@@ -561,7 +562,7 @@ public:
 	{
 		if (str == nullptr) return;
 
-		DoCommandP(CMD_RENAME_TOWN, STR_ERROR_CAN_T_RENAME_TOWN, 0, this->window_number, 0, str);
+		Command<CMD_RENAME_TOWN>::Post(STR_ERROR_CAN_T_RENAME_TOWN, 0, this->window_number, 0, str);
 	}
 };
 
@@ -1162,7 +1163,7 @@ public:
 			if (strcmp(buf, this->townname_editbox.text.buf) != 0) name = this->townname_editbox.text.buf;
 		}
 
-		bool success = DoCommandP(CMD_FOUND_TOWN, errstr, cc,
+		bool success = Command<CMD_FOUND_TOWN>::Post(errstr, cc,
 				tile, this->town_size | this->city << 2 | this->town_layout << 3 | random << 6, townnameparts, name);
 
 		/* Rerandomise name, if success and no cost-estimation. */
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -35,6 +35,7 @@
 #include "newgrf_debug.h"
 #include "framerate_type.h"
 #include "train_cmd.h"
+#include "misc_cmd.h"
 
 #include "table/strings.h"
 #include "table/train_sprites.h"
@@ -87,7 +88,7 @@ void CheckTrainsLengths()
 
 						if (!_networking && first) {
 							first = false;
-							DoCommandP(CMD_PAUSE, 0, PM_PAUSED_ERROR, 1);
+							Command<CMD_PAUSE>::Post(0, PM_PAUSED_ERROR, 1, {});
 						}
 						/* Break so we warn only once for each train. */
 						break;
diff --git a/src/train_gui.cpp b/src/train_gui.cpp
--- a/src/train_gui.cpp
+++ b/src/train_gui.cpp
@@ -14,6 +14,7 @@
 #include "strings_func.h"
 #include "vehicle_func.h"
 #include "zoom_func.h"
+#include "train_cmd.h"
 
 #include "table/strings.h"
 
@@ -45,7 +46,7 @@ void CcBuildWagon(const CommandCost &res
 	if (found != nullptr) {
 		found = found->Last();
 		/* put the new wagon at the end of the loco. */
-		DoCommandP(CMD_MOVE_RAIL_VEHICLE, 0, _new_vehicle_id, found->index);
+		Command<CMD_MOVE_RAIL_VEHICLE>::Post(0, _new_vehicle_id, found->index, {});
 		InvalidateWindowClassesData(WC_TRAINS_LIST, 0);
 	}
 }
diff --git a/src/tree_gui.cpp b/src/tree_gui.cpp
--- a/src/tree_gui.cpp
+++ b/src/tree_gui.cpp
@@ -19,6 +19,7 @@
 #include "strings_func.h"
 #include "zoom_func.h"
 #include "tree_map.h"
+#include "tree_cmd.h"
 
 #include "widgets/tree_widget.h"
 
@@ -230,7 +231,7 @@ public:
 			TileIndex tile = TileVirtXY(pt.x, pt.y);
 
 			if (this->mode == PM_NORMAL) {
-				DoCommandP(CMD_PLANT_TREE, tile, this->tree_to_plant, tile);
+				Command<CMD_PLANT_TREE>::Post(tile, this->tree_to_plant, tile, {});
 			} else {
 				this->DoPlantForest(tile);
 			}
@@ -240,7 +241,7 @@ public:
 	void OnPlaceMouseUp(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt, TileIndex start_tile, TileIndex end_tile) override
 	{
 		if (_game_mode != GM_EDITOR && this->mode == PM_NORMAL && pt.x != -1 && select_proc == DDSP_PLANT_TREES) {
-			DoCommandP(CMD_PLANT_TREE, STR_ERROR_CAN_T_PLANT_TREE_HERE, end_tile, this->tree_to_plant, start_tile);
+			Command<CMD_PLANT_TREE>::Post(STR_ERROR_CAN_T_PLANT_TREE_HERE, end_tile, this->tree_to_plant, start_tile, {});
 		}
 	}
 
diff --git a/src/vehicle_gui.cpp b/src/vehicle_gui.cpp
--- a/src/vehicle_gui.cpp
+++ b/src/vehicle_gui.cpp
@@ -38,6 +38,9 @@
 #include "zoom_func.h"
 #include "depot_cmd.h"
 #include "vehicle_cmd.h"
+#include "order_cmd.h"
+#include "roadveh_cmd.h"
+#include "train_cmd.h"
 
 #include "safeguards.h"
 
@@ -1035,9 +1038,9 @@ struct RefitWindow : public Window {
 
 					if (this->order == INVALID_VEH_ORDER_ID) {
 						bool delete_window = this->selected_vehicle == v->index && this->num_vehicles == UINT8_MAX;
-						if (DoCommandP(CMD_REFIT_VEHICLE, GetCmdRefitVehMsg(v), v->tile, this->selected_vehicle, this->cargo->cargo | this->cargo->subtype << 8 | this->num_vehicles << 16) && delete_window) this->Close();
+						if (Command<CMD_REFIT_VEHICLE>::Post(GetCmdRefitVehMsg(v), v->tile, this->selected_vehicle, this->cargo->cargo | this->cargo->subtype << 8 | this->num_vehicles << 16, {}) && delete_window) this->Close();
 					} else {
-						if (DoCommandP(CMD_ORDER_REFIT, v->tile, v->index, this->cargo->cargo | this->order << 16)) this->Close();
+						if (Command<CMD_ORDER_REFIT>::Post(v->tile, v->index, this->cargo->cargo | this->order << 16, {})) this->Close();
 					}
 				}
 				break;
@@ -1896,7 +1899,7 @@ public:
 
 			case WID_VL_STOP_ALL:
 			case WID_VL_START_ALL:
-				DoCommandP(CMD_MASS_START_STOP, 0, (1 << 1) | (widget == WID_VL_START_ALL ? (1 << 0) : 0), this->window_number);
+				Command<CMD_MASS_START_STOP>::Post(0, (1 << 1) | (widget == WID_VL_START_ALL ? (1 << 0) : 0), this->window_number, {});
 				break;
 		}
 	}
@@ -1921,7 +1924,7 @@ public:
 						break;
 					case ADI_SERVICE: // Send for servicing
 					case ADI_DEPOT: // Send to Depots
-						DoCommandP(CMD_SEND_VEHICLE_TO_DEPOT, GetCmdSendToDepotMsg(this->vli.vtype), 0, DEPOT_MASS_SEND | (index == ADI_SERVICE ? DEPOT_SERVICE : (DepotCommand)0), this->window_number);
+						Command<CMD_SEND_VEHICLE_TO_DEPOT>::Post(GetCmdSendToDepotMsg(this->vli.vtype), 0, DEPOT_MASS_SEND | (index == ADI_SERVICE ? DEPOT_SERVICE : (DepotCommand)0), this->window_number, {});
 						break;
 
 					default: NOT_REACHED();
@@ -2424,7 +2427,7 @@ struct VehicleDetailsWindow : Window {
 				mod = GetServiceIntervalClamped(mod + v->GetServiceInterval(), v->ServiceIntervalIsPercent());
 				if (mod == v->GetServiceInterval()) return;
 
-				DoCommandP(CMD_CHANGE_SERVICE_INT, STR_ERROR_CAN_T_CHANGE_SERVICING, v->tile, v->index, mod | (1 << 16) | (v->ServiceIntervalIsPercent() << 17));
+				Command<CMD_CHANGE_SERVICE_INT>::Post(STR_ERROR_CAN_T_CHANGE_SERVICING, v->tile, v->index, mod | (1 << 16) | (v->ServiceIntervalIsPercent() << 17), {});
 				break;
 			}
 
@@ -2460,7 +2463,7 @@ struct VehicleDetailsWindow : Window {
 				bool iscustom = index != 0;
 				bool ispercent = iscustom ? (index == 2) : Company::Get(v->owner)->settings.vehicle.servint_ispercent;
 				uint16 interval = GetServiceIntervalClamped(v->GetServiceInterval(), ispercent);
-				DoCommandP(CMD_CHANGE_SERVICE_INT, STR_ERROR_CAN_T_CHANGE_SERVICING, v->tile, v->index, interval | (iscustom << 16) | (ispercent << 17));
+				Command<CMD_CHANGE_SERVICE_INT>::Post(STR_ERROR_CAN_T_CHANGE_SERVICING, v->tile, v->index, interval | (iscustom << 16) | (ispercent << 17), {});
 				break;
 			}
 		}
@@ -2643,7 +2646,7 @@ void CcStartStopVehicle(const CommandCos
 void StartStopVehicle(const Vehicle *v, bool texteffect)
 {
 	assert(v->IsPrimaryVehicle());
-	DoCommandP(CMD_START_STOP_VEHICLE, _vehicle_msg_translation_table[VCT_CMD_START_STOP][v->type], texteffect ? CcStartStopVehicle : nullptr, v->tile, v->index, 0);
+	Command<CMD_START_STOP_VEHICLE>::Post(_vehicle_msg_translation_table[VCT_CMD_START_STOP][v->type], texteffect ? CcStartStopVehicle : nullptr, v->tile, v->index, 0, {});
 }
 
 /** Checks whether the vehicle may be refitted at the moment.*/
@@ -2967,7 +2970,7 @@ public:
 				break;
 
 			case WID_VV_GOTO_DEPOT: // goto hangar
-				DoCommandP(CMD_SEND_VEHICLE_TO_DEPOT, GetCmdSendToDepotMsg(v), v->tile, v->index | (_ctrl_pressed ? DEPOT_SERVICE : 0U), 0);
+				Command<CMD_SEND_VEHICLE_TO_DEPOT>::Post(GetCmdSendToDepotMsg(v), v->tile, v->index | (_ctrl_pressed ? DEPOT_SERVICE : 0U), 0, {});
 				break;
 			case WID_VV_REFIT: // refit
 				ShowVehicleRefitWindow(v, INVALID_VEH_ORDER_ID, this);
@@ -2991,21 +2994,21 @@ public:
 				 * There is no point to it except for starting the vehicle.
 				 * For starting the vehicle the player has to open the depot GUI, which is
 				 * most likely already open, but is also visible in the vehicle viewport. */
-				DoCommandP(CMD_CLONE_VEHICLE, _vehicle_msg_translation_table[VCT_CMD_CLONE_VEH][v->type],
+				Command<CMD_CLONE_VEHICLE>::Post(_vehicle_msg_translation_table[VCT_CMD_CLONE_VEH][v->type],
 										_ctrl_pressed ? nullptr : CcCloneVehicle,
-										v->tile, v->index, _ctrl_pressed ? 1 : 0);
+										v->tile, v->index, _ctrl_pressed ? 1 : 0, {});
 				break;
 			case WID_VV_TURN_AROUND: // turn around
 				assert(v->IsGroundVehicle());
 				if (v->type == VEH_ROAD) {
-					DoCommandP(CMD_TURN_ROADVEH, _vehicle_msg_translation_table[VCT_CMD_TURN_AROUND][v->type], v->tile, v->index, 0);
+					Command<CMD_TURN_ROADVEH>::Post(_vehicle_msg_translation_table[VCT_CMD_TURN_AROUND][v->type], v->tile, v->index, 0, {});
 				} else {
-					DoCommandP(CMD_REVERSE_TRAIN_DIRECTION, _vehicle_msg_translation_table[VCT_CMD_TURN_AROUND][v->type], v->tile, v->index, 0);
+					Command<CMD_REVERSE_TRAIN_DIRECTION>::Post(_vehicle_msg_translation_table[VCT_CMD_TURN_AROUND][v->type], v->tile, v->index, 0, {});
 				}
 				break;
 			case WID_VV_FORCE_PROCEED: // force proceed
 				assert(v->type == VEH_TRAIN);
-				DoCommandP(CMD_FORCE_TRAIN_PROCEED, STR_ERROR_CAN_T_MAKE_TRAIN_PASS_SIGNAL, v->tile, v->index, 0);
+				Command<CMD_FORCE_TRAIN_PROCEED>::Post(STR_ERROR_CAN_T_MAKE_TRAIN_PASS_SIGNAL, v->tile, v->index, 0, {});
 				break;
 		}
 	}
@@ -3014,7 +3017,7 @@ public:
 	{
 		if (str == nullptr) return;
 
-		DoCommandP(CMD_RENAME_VEHICLE, STR_ERROR_CAN_T_RENAME_TRAIN + Vehicle::Get(this->window_number)->type, 0, this->window_number, 0, str);
+		Command<CMD_RENAME_VEHICLE>::Post(STR_ERROR_CAN_T_RENAME_TRAIN + Vehicle::Get(this->window_number)->type, 0, this->window_number, 0, str);
 	}
 
 	void OnMouseOver(Point pt, int widget) override
diff --git a/src/waypoint_gui.cpp b/src/waypoint_gui.cpp
--- a/src/waypoint_gui.cpp
+++ b/src/waypoint_gui.cpp
@@ -20,6 +20,7 @@
 #include "company_base.h"
 #include "window_func.h"
 #include "waypoint_base.h"
+#include "waypoint_cmd.h"
 
 #include "widgets/waypoint_widget.h"
 
@@ -138,7 +139,7 @@ public:
 	{
 		if (str == nullptr) return;
 
-		DoCommandP(CMD_RENAME_WAYPOINT, STR_ERROR_CAN_T_CHANGE_WAYPOINT_NAME, 0, this->window_number, 0, str);
+		Command<CMD_RENAME_WAYPOINT>::Post(STR_ERROR_CAN_T_CHANGE_WAYPOINT_NAME, 0, this->window_number, 0, str);
 	}
 
 };