77 lines
2.5 KiB
TypeScript
77 lines
2.5 KiB
TypeScript
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import { Platform } from 'react-native';
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import dayjs from 'dayjs';
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import utc from 'dayjs/plugin/utc';
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dayjs.extend(utc);
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const API_BASE = (process.env.EXPO_PUBLIC_API_BASE ?? '').replace(/\/$/, '');
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/**
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* 创建跨平台兼容的文件对象，用于 FormData.append()
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* - Web 端返回 File 对象
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* - 移动端返回 { uri, type, name } 对象（RN fetch 会自动处理）
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* @param fileUri Expo 媒体库（如 expo-image-picker、expo-camera）返回的 uri
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* @param fileName 上传时的文件名，如 'photo.jpg'
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* @param mimeType 文件 MIME 类型，如 'image/jpeg'、'audio/mpeg'
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*/
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export async function createFormDataFile(
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fileUri: string,
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fileName: string,
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mimeType: string
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): Promise<File | { uri: string; type: string; name: string }> {
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if (Platform.OS === 'web') {
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const response = await fetch(fileUri);
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const blob = await response.blob();
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return new File([blob], fileName, { type: mimeType });
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}
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return { uri: fileUri, type: mimeType, name: fileName };
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}
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/**
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* 构建文件或图片完整的URL
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* @param url 相对或绝对路径
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* @param w 宽度 (px) - 自动向下取整
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* @param h 高度 (px)
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*/
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export const buildAssetUrl = (url?: string | null, w?: number, h?: number): string | undefined => {
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if (!url) return undefined;
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if (/^https?:\/\//i.test(url)) return url; // 绝对路径直接返回
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// 1. 去除 Base 尾部和 Path 头部的斜杠
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const base = API_BASE;
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const path = url.replace(/^\//, '');
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const abs = `${base}/${path}`;
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// 2. 无需缩略图则直接返回
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if (!w && !h) return abs;
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// 3. 构造参数，保留原有 Query (如有)
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const separator = abs.includes('?') ? '&' : '?';
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const query = [
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w ? `w=${Math.floor(w)}` : '',
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h ? `h=${Math.floor(h)}` : ''
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].filter(Boolean).join('&');
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return `${abs}${separator}${query}`;
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};
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/**
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* 将UTC时间字符串转换为本地时间字符串
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* @param utcDateStr UTC时间字符串，格式如：2025-11-26T01:49:48.009573
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* @returns 本地时间字符串，格式如：2025-11-26 08:49:48
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*/
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export const convertToLocalTimeStr = (utcDateStr: string): string => {
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if (!utcDateStr) {
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return utcDateStr;
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}
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const microUtcRegex = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{1,6}/;
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if (!microUtcRegex.test(utcDateStr)) {
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console.log('invalid utcDateStr:', utcDateStr);
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return utcDateStr;
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}
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const normalized = utcDateStr.replace(/\.(\d{6})$/, (_, frac) => `.${frac.slice(0, 3)}`);
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const d = dayjs.utc(normalized);
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if (!d.isValid()) {
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return utcDateStr;
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}
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return d.local().format('YYYY-MM-DD HH:mm:ss');
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}
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