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