檔案上傳新增至資料庫

lib/utils/file-path.ts

@@ -0,0 +1,67 @@
+import { join } from 'path';
+
+/**
+ * 檔案路徑工具函數
+ * 用於處理檔案上傳和路徑管理
+ */
+
+/**
+ * 獲取檔案上傳的絕對路徑（用於實際儲存）
+ */
+export function getUploadAbsolutePath(projectId: string | number, fileName: string): string {
+  return join(process.cwd(), 'uploads', 'projects', projectId.toString(), fileName);
+}
+
+/**
+ * 獲取檔案上傳的相對路徑（用於資料庫儲存）
+ */
+export function getUploadRelativePath(projectId: string | number, fileName: string): string {
+  return `uploads/projects/${projectId}/${fileName}`;
+}
+
+/**
+ * 獲取檔案上傳目錄的絕對路徑
+ */
+export function getUploadDirPath(projectId: string | number): string {
+  return join(process.cwd(), 'uploads', 'projects', projectId.toString());
+}
+
+/**
+ * 從相對路徑獲取絕對路徑
+ */
+export function getAbsolutePathFromRelative(relativePath: string): string {
+  return join(process.cwd(), relativePath);
+}
+
+/**
+ * 生成唯一檔案名稱
+ */
+export function generateUniqueFileName(originalName: string): string {
+  const fileExtension = originalName.split('.').pop();
+  const timestamp = Date.now();
+  const randomString = Math.random().toString(36).substr(2, 9);
+  return `${timestamp}_${randomString}.${fileExtension}`;
+}
+
+/**
+ * 驗證檔案類型
+ */
+export function isValidFileType(mimeType: string): boolean {
+  const allowedTypes = [
+    'application/vnd.ms-powerpoint',
+    'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+    'video/mp4',
+    'video/avi',
+    'video/quicktime',
+    'application/pdf'
+  ];
+  return allowedTypes.includes(mimeType);
+}
+
+/**
+ * 驗證檔案大小
+ */
+export function isValidFileSize(size: number, maxSizeMB: number = 100): boolean {
+  const maxSize = maxSizeMB * 1024 * 1024; // 轉換為位元組
+  return size <= maxSize;
+}