feat: parse directory with -d option (#4)

README.md

@@ -74,5 +74,6 @@ make win32
 
 ## 使用
 
-1. 命令行下使用 `ncmdump [files]...`
-2. 直接 ncm 拖拽文件到二进制文件上
+1. 多文件：命令行下使用 `ncmdump file1 file2...`
+2. 文件夹批量处理：命令行下使用 `ncmdump -d folder`
+3. 直接 ncm 拖拽文件到二进制文件上

main.cpp

@@ -1,27 +1,84 @@
 #include "ncmcrypt.h"
 
+#include <iostream>
 #include <stdexcept>
+#include <vector>
+#include <filesystem>
 
-int main(int argc, char *argv[]) {
+namespace fs = std::filesystem;
 
-	if (argc <= 1) {
-		std::cout << "Please input file path!" << std::endl;
-		return 1;
+void displayHelp() {
+    std::cout << "Usage: ncmdump [-d] [-h] file1 file2 ..." << std::endl;
+    std::cout << "Options:" << std::endl;
+    std::cout << "  -d                Process files in a folder (requires folder path)" << std::endl;
+    std::cout << "  -h, --help       Display this help message" << std::endl;
+}
+
+void processFile(const std::string& filePath) {
+    if (fs::exists(filePath) == false) {
+        std::cerr << "Error: file '" << filePath << "' does not exist." << std::endl;
+        return;
     }
 
     try {
-		int i;
-		for (i = 1; i < argc; i++) {
-			NeteaseCrypt crypt(argv[i]);
+        NeteaseCrypt crypt(filePath);
         crypt.Dump();
         crypt.FixMetadata();
 
-			std::cout << crypt.dumpFilepath() << std::endl;
-		}
-	} catch (std::invalid_argument e) {
-		std::cout << "Exception: " << e.what() << std::endl;
+        std::cout << "Done: " << crypt.dumpFilepath() << std::endl;
+    } catch (const std::invalid_argument& e) {
+        std::cout << "Exception: '" << filePath << "'" << e.what() << std::endl;
     } catch (...) {
-		std::cout << "Unexcept exception!" << std::endl;
+        std::cout << "Unexpected exception while processing file: " << filePath << std::endl;
+    }
+}
+
+void processFilesInFolder(const std::string& folderPath) {
+    for (const auto& entry : fs::directory_iterator(folderPath)) {
+        if (fs::is_regular_file(entry.status())) {
+            processFile(entry.path().string());
+        }
+    }
+}
+
+int main(int argc, char* argv[]) {
+    if (argc <= 1) {
+        displayHelp();
+        return 1;
+    }
+
+    std::vector<std::string> files;
+    bool processFolders = false;
+    bool folderProvided = false;
+
+    for (int i = 1; i < argc; ++i) {
+        std::string arg = argv[i];
+
+        if (arg == "-h" || arg == "--help") {
+            displayHelp();
+            return 0;
+        } else if (arg == "-d") {
+            processFolders = true;
+            if (i + 1 < argc && argv[i + 1][0] != '-') {
+                folderProvided = true;
+                processFilesInFolder(argv[i + 1]);
+                // Skip the folder name
+                ++i;
+            } else {
+                std::cerr << "Error: -d option requires a folder path." << std::endl;
+                return 1;
+            }
+        } else {
+            files.push_back(arg);
+        }
+    }
+
+    for (const auto& file : files) {
+        if (processFolders && fs::is_directory(file)) {
+            processFilesInFolder(file);
+        } else {
+            processFile(file);
+        }
     }
 
     return 0;

ncmcrypt.cpp

@@ -113,13 +113,13 @@ NeteaseMusicMetadata::NeteaseMusicMetadata(cJSON* raw) {
 }
 
 bool NeteaseCrypt::openFile(std::string const& path) {
-	try {
     mFile.open(path, std::ios::in | std::ios::binary);
-	} catch (...) {
+    if (!mFile.is_open()) {
         return false;
-	}
+    } else {
         return true;
     }
+}
 
 bool NeteaseCrypt::isNcmFile() {
 	unsigned int header;