69 行
1.7 KiB
TypeScript
69 行
1.7 KiB
TypeScript
import * as fs from 'fs';
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import { PathOrFileDescriptor, WriteFileOptions } from 'fs';
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class SyncFileDebouncer {
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private static instance: SyncFileDebouncer;
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private readonly debounceTime: number;
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private timers: { [path: string]: NodeJS.Timeout } = {};
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private constructor(debounceTime: number = 300) {
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this.debounceTime = debounceTime;
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}
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public static getInstance(debounceTime?: number): SyncFileDebouncer {
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if (!SyncFileDebouncer.instance) {
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SyncFileDebouncer.instance = new SyncFileDebouncer(debounceTime);
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}
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return SyncFileDebouncer.instance;
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}
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public writeFileSync(
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file: string,
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data: string | NodeJS.ArrayBufferView,
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options?: WriteFileOptions,
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) {
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if (this.timers[file]) {
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clearTimeout(this.timers[file]);
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}
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this.timers[file] = setTimeout(() => {
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fs.writeFileSync(file, data);
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delete this.timers[file];
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}, this.debounceTime);
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}
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}
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// 使用示例
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export const fileDebouncer = SyncFileDebouncer.getInstance(500); // 100ms 的 debounce 时间
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export function getImageExtension(contentType: string): string {
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switch (contentType) {
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case 'image/jpeg':
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return 'jpeg';
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case 'image/jpg':
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return 'jpg';
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case 'image/png':
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return 'png';
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case 'image/gif':
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return 'gif';
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case 'image/bmp':
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return 'bmp';
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case 'image/webp':
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return 'webp';
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// Add other cases as needed
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default:
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throw new Error(`Unsupported content type: ${contentType}`);
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}
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}
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export function IsImageMineType(mimeType: string): boolean {
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return (
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mimeType === 'image/jpeg' ||
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mimeType === 'image/jpg' ||
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mimeType === 'image/png' ||
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mimeType === 'image/gif' ||
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mimeType === 'image/bmp' ||
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mimeType === 'image/webp'
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);
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}
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