h2-mod/src/component/command.cpp

#include <stdinc.hpp>
#include "loader/component_loader.hpp"

#include "game/game.hpp"
#include "game/dvars.hpp"

#include "command.hpp"
#include "game_console.hpp"
#include "chat.hpp"

#include <utils/hook.hpp>
#include <utils/string.hpp>
#include <utils/memory.hpp>

namespace command
{
	namespace
	{
		utils::hook::detour dvar_command_hook;

		std::unordered_map<std::string, std::function<void(params&)>> handlers;

		void main_handler()
		{
			params params = {};

			const auto command = utils::string::to_lower(params[0]);
			if (handlers.find(command) != handlers.end())
			{
				handlers[command](params);
			}
		}

		void enum_assets(const game::XAssetType type, const std::function<void(game::XAssetHeader)>& callback, const bool includeOverride)
		{
			game::DB_EnumXAssets_Internal(type, static_cast<void(*)(game::XAssetHeader, void*)>([](game::XAssetHeader header, void* data)
			{
				const auto& cb = *static_cast<const std::function<void(game::XAssetHeader)>*>(data);
				cb(header);
			}), &callback, includeOverride);
		}

		game::dvar_t* dvar_command_stub()
		{
			const params args;

			if (args.size() <= 0)
			{
				return 0;
			}

			const auto dvar = game::Dvar_FindVar(args[0]);

			if (dvar)
			{
				if (args.size() == 1)
				{
					const auto current = game::Dvar_ValueToString(dvar, nullptr, &dvar->current);
					const auto reset = game::Dvar_ValueToString(dvar, nullptr, &dvar->reset);

					game_console::print(game_console::con_type_info, "\"%s\" is: \"%s\" default: \"%s\" hash: %i",
						args[0], current, reset, dvar->name);

					game_console::print(game_console::con_type_info, "   %s\n",
						dvars::dvar_get_domain(dvar->type, dvar->domain).data());
				}
				else
				{
					char command[0x1000] = { 0 };
					game::Dvar_GetCombinedString(command, 1);
					game::Dvar_SetCommand(dvar->name, "", command);
				}

				return dvar;
			}

			return 0;
		}
	}

	params::params()
		: nesting_(game::cmd_args->nesting)
	{
	}

	int params::size() const
	{
		return game::cmd_args->argc[this->nesting_];
	}

	const char* params::get(const int index) const
	{
		if (index >= this->size())
		{
			return "";
		}

		return game::cmd_args->argv[this->nesting_][index];
	}

	std::string params::join(const int index) const
	{
		std::string result = {};

		for (auto i = index; i < this->size(); i++)
		{
			if (i > index) result.append(" ");
			result.append(this->get(i));
		}
		return result;
	}

	void add_raw(const char* name, void (*callback)())
	{
		game::Cmd_AddCommandInternal(name, callback, utils::memory::get_allocator()->allocate<game::cmd_function_s>());
	}

	void add(const char* name, const std::function<void(const params&)>& callback)
	{
		const auto command = utils::string::to_lower(name);

		if (handlers.find(command) == handlers.end())
			add_raw(name, main_handler);

		handlers[command] = callback;
	}

	void add(const char* name, const std::function<void()>& callback)
	{
		add(name, [callback](const params&)
		{
			callback();
		});
	}

	void execute(std::string command, const bool sync)
	{
		command += "\n";

		if (sync)
		{
			game::Cmd_ExecuteSingleCommand(0, 0, command.data());
		}
		else
		{
			game::Cbuf_AddText(0, command.data());
		}
	}

	class component final : public component_interface
	{
	public:
		void post_unpack() override
		{
			utils::hook::jump(game::base_address + 0x5A74F0, dvar_command_stub, true);

			add("say", [](const params& params)
			{
				chat::print(params.join(1));
			});

			add("listassetpool", [](const params& params)
			{
				if (params.size() < 2)
				{
					game_console::print(game_console::con_type_info, "listassetpool <poolnumber>: list all the assets in the specified pool\n");

					for (auto i = 0; i < game::XAssetType::ASSET_TYPE_COUNT; i++)
					{
						game_console::print(game_console::con_type_info, "%d %s\n", i, game::g_assetNames[i]);
					}
				}
				else
				{
					const auto type = static_cast<game::XAssetType>(atoi(params.get(1)));

					if (type < 0 || type >= game::XAssetType::ASSET_TYPE_COUNT)
					{
						game_console::print(game_console::con_type_info, "Invalid pool passed must be between [%d, %d]\n", 0, game::XAssetType::ASSET_TYPE_COUNT - 1);
						return;
					}

					game_console::print(game_console::con_type_info, "Listing assets in pool %s\n", game::g_assetNames[type]);

					enum_assets(type, [type](const game::XAssetHeader header)
					{
						const auto asset = game::XAsset{ type, header };
						const auto* const asset_name = game::DB_GetXAssetName(&asset);
						//const auto entry = game::DB_FindXAssetEntry(type, asset_name);
						//TODO: display which zone the asset is from
						game_console::print(game_console::con_type_info, "%s\n", asset_name);
					}, true);
				}
			});

			add("baseAddress", []()
			{
				printf("%p\n", (void*)game::base_address);
			});

			add("commandDump", []()
			{
				printf("======== Start command dump =========\n");

				game::cmd_function_s* cmd = (*game::cmd_functions);

				while (cmd)
				{
					if (cmd->name)
					{
						game_console::print(game_console::con_type_info, "%s\n", cmd->name);
					}

					cmd = cmd->next;
				}

				printf("======== End command dump =========\n");
			});
		}
	};
}

REGISTER_COMPONENT(command::component)