| 1 | import path from 'node:path'; |
| 2 | import * as fs from 'node:fs'; |
| 3 | |
| 4 | enum Type { |
| 5 | IMAGE = '图片', |
| 6 | TXT = '文档', |
| 7 | MUSIC = '音乐', |
| 8 | VIDEO = '视频', |
| 9 | OTHER = '其他', |
| 10 | } |
| 11 | |
| 12 | export function getFileType(extName: string) { |
| 13 | const documents = 'txt doc pdf ppt pps xlsx xls docx'; |
| 14 | const music = 'mp3 wav wma mpa ram ra aac aif m4a'; |
| 15 | const video = 'avi mpg mpe mpeg asf wmv mov qt rm mp4 flv m4v webm ogv ogg'; |
| 16 | const image = |
| 17 | 'bmp dib pcp dif wmf gif jpg tif eps psd cdr iff tga pcd mpt png jpeg'; |
| 18 | if (image.includes(extName)) return Type.IMAGE; |
| 19 | |
| 20 | if (documents.includes(extName)) return Type.TXT; |
| 21 | |
| 22 | if (music.includes(extName)) return Type.MUSIC; |
| 23 | |
| 24 | if (video.includes(extName)) return Type.VIDEO; |
| 25 | |
| 26 | return Type.OTHER; |
| 27 | } |
| 28 | |
| 29 | export function getName(fileName: string) { |
| 30 | if (fileName.includes('.')) return fileName.split('.')[0]; |
| 31 | |
| 32 | return fileName; |
| 33 | } |
| 34 | |
| 35 | export function getExtname(fileName: string) { |
| 36 | return path.extname(fileName).replace('.', ''); |
| 37 | } |
| 38 | |
| 39 | export function getSize(bytes: number, decimals = 2) { |
| 40 | if (bytes === 0) return '0 Bytes'; |
| 41 | |
| 42 | const k = 1024; |
| 43 | const dm = decimals < 0 ? 0 : decimals; |
| 44 | const sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']; |
| 45 | |
| 46 | const i = Math.floor(Math.log(bytes) / Math.log(k)); |
| 47 | |
| 48 | return `${Number.parseFloat((bytes / k ** i).toFixed(dm))} ${sizes[i]}`; |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * nodejs存储文件到本地 |
| 53 | * @param base64String |
| 54 | * @param path |
| 55 | * @param fileName |
| 56 | * @returns |
| 57 | */ |
| 58 | export function saveFile(base64String: string, path: string, fileName: string) { |
| 59 | // 文件不存在则创建文件 |
| 60 | if (!fs.existsSync(path)) { |
| 61 | fs.mkdirSync(path, { recursive: true }); |
| 62 | } |
| 63 | |
| 64 | return new Promise((resolve, reject) => { |
| 65 | fs.writeFile(path + fileName, base64String, 'base64', (err) => { |
| 66 | if (err) { |
| 67 | reject(err); |
| 68 | } else { |
| 69 | resolve(true); |
| 70 | } |
| 71 | }); |
| 72 | }); |
| 73 | } |
| 74 |