项目迁移

backend/src/dearth/utils/FileExtractor.ts

@@ -0,0 +1,57 @@
+import fs from "node:fs";
+import crypto from "node:crypto";
+import path from "node:path";
+import { JarParser } from "../../utils/jar-parser.js";
+import { logger } from "../../utils/logger.js";
+import { IFileInfo } from "../types.js";
+
+export class FileExtractor {
+  private readonly modsPath: string;
+
+  constructor(modsPath: string) {
+    this.modsPath = path.isAbsolute(modsPath) ? modsPath : path.resolve(modsPath);
+  }
+
+  async extractFilesInfo(): Promise<IFileInfo[]> {
+    const jarFiles = this.getJarFiles();
+    const files: IFileInfo[] = [];
+    
+    logger.info("获取文件信息", { 文件数量: jarFiles.length });
+
+    for (const jarFilename of jarFiles) {
+      const fullPath = path.join(this.modsPath, jarFilename);
+
+      try {
+        let fileData: Buffer | null = null;
+        try {
+          fileData = fs.readFileSync(fullPath);
+          const mixins = await JarParser.extractMixins(fileData);
+          const infos = await JarParser.extractModInfo(fileData);
+
+          files.push({
+            filename: fullPath,
+            hash: crypto.createHash('sha1').update(fileData).digest('hex'),
+            mixins,
+            infos,
+          });
+
+          logger.debug("文件已处理", { 文件名: fullPath, 绝对路径: path.resolve(fullPath), Mixin数量: mixins.length });
+        } finally {
+          fileData = null;
+        }
+      } catch (error: any) {
+        logger.error("处理文件时出错", { 文件名: fullPath, 错误: error.message });
+      }
+    }
+
+    logger.debug("文件信息收集完成", { 已处理文件: files.length });
+    return files;
+  }
+
+  private getJarFiles(): string[] {
+    if (!fs.existsSync(this.modsPath)) {
+      fs.mkdirSync(this.modsPath, { recursive: true });
+    }
+    return fs.readdirSync(this.modsPath).filter(f => f.endsWith(".jar"));
+  }
+}