Skip GUI if launching a game directly (#1507)

* Skip GUI if launching a game directly

* Rerun jobs 2

* Added --show-gui, --help, open game by ID and more

* Clang-format

* Added non-GUI related upgrades to SDL version

* clang-format

* Added --fullscreen <true|false> argument

* Update --help text

src/main.cpp

@@ -1,7 +1,13 @@
 // SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include "functional"
+#include "iostream"
+#include "string"
+#include "unordered_map"
+
 #include <fmt/core.h>
+#include "common/config.h"
 #include "common/memory_patcher.h"
 #include "emulator.h"
 
@@ -14,26 +20,105 @@ int main(int argc, char* argv[]) {
     SetConsoleOutputCP(CP_UTF8);
 #endif
 
+    bool has_game_argument = false;
+    std::string game_path;
+
+    // Map of argument strings to lambda functions
+    std::unordered_map<std::string, std::function<void(int&)>> arg_map = {
+        {"-h",
+         [&](int&) {
+             std::cout << "Usage: shadps4 [options] <elf or eboot.bin path>\n"
+                          "Options:\n"
+                          "  -g, --game <path|ID>          Specify game path to launch\n"
+                          "  -p, --patch <patch_file>      Apply specified patch file\n"
+                          "  -f, --fullscreen <true|false> Specify window initial fullscreen "
+                          "state. Does not overwrite the config file."
+                          "  -h, --help                    Display this help message\n";
+             exit(0);
+         }},
+        {"--help", [&](int& i) { arg_map["-h"](i); }},
+
+        {"-g",
+         [&](int& i) {
+             if (i + 1 < argc) {
+                 game_path = argv[++i];
+                 has_game_argument = true;
+             } else {
+                 std::cerr << "Error: Missing argument for -g/--game\n";
+                 exit(1);
+             }
+         }},
+        {"--game", [&](int& i) { arg_map["-g"](i); }},
+
+        {"-p",
+         [&](int& i) {
+             if (i + 1 < argc) {
+                 MemoryPatcher::patchFile = argv[++i];
+             } else {
+                 std::cerr << "Error: Missing argument for -p/--patch\n";
+                 exit(1);
+             }
+         }},
+        {"--patch", [&](int& i) { arg_map["-p"](i); }},
+        {"-f",
+         [&](int& i) {
+             if (++i >= argc) {
+                 std::cerr << "Error: Missing argument for -f/--fullscreen\n";
+                 exit(1);
+             }
+             std::string f_param(argv[i]);
+             bool is_fullscreen;
+             if (f_param == "true") {
+                 is_fullscreen = true;
+             } else if (f_param == "false") {
+                 is_fullscreen = false;
+             } else {
+                 std::cerr
+                     << "Error: Invalid argument for -f/--fullscreen. Use 'true' or 'false'.\n";
+                 exit(1);
+             }
+             // Set fullscreen mode without saving it to config file
+             Config::setFullscreenMode(is_fullscreen);
+         }},
+        {"--fullscreen", [&](int& i) { arg_map["-f"](i); }},
+    };
+
     if (argc == 1) {
-        fmt::print("Usage: {} <elf or eboot.bin path>\n", argv[0]);
-        return -1;
-    }
-    // check if eboot file exists
-    if (!std::filesystem::exists(argv[1])) {
-        fmt::print("Eboot.bin file not found\n");
+        int dummy = 0; // one does not simply pass 0 directly
+        arg_map.at("-h")(dummy);
         return -1;
     }
 
-    for (int i = 0; i < argc; i++) {
-        std::string curArg = argv[i];
-        if (curArg == "-p") {
-            std::string patchFile = argv[i + 1];
-            MemoryPatcher::patchFile = patchFile;
+    // Parse command-line arguments using the map
+    for (int i = 1; i < argc; ++i) {
+        std::string cur_arg = argv[i];
+        auto it = arg_map.find(cur_arg);
+        if (it != arg_map.end()) {
+            it->second(i); // Call the associated lambda function
+        } else if (i == argc - 1 && !has_game_argument) {
+            // Assume the last argument is the game file if not specified via -g/--game
+            game_path = argv[i];
+            has_game_argument = true;
+        } else {
+            std::cerr << "Unknown argument: " << cur_arg << ", see --help for info.\n";
+            return 1;
         }
     }
 
+    if (!has_game_argument) {
+        std::cerr << "Error: Please provide a game path or ID.\n";
+        exit(1);
+    }
+
+    // Check if the game path or ID exists
+    if (!std::filesystem::exists(game_path)) {
+        std::cerr << "Error: Game file not found\n";
+        return -1;
+    }
+
+    // Run the emulator with the specified game
     Core::Emulator emulator;
-    emulator.Run(argv[1]);
+    emulator.Run(game_path);
 
     return 0;
 }