app/node_modules/fmode-ng/esm2022/lib/storage/service-upload/util-file-metadata.mjs

    /**
     * @copyright © 未来飞马 © 未来全栈 www.fmode.cn 
     * 版权所有 © 未来飞马 © 江西脑控科技有限公司 Copyright © Fmode Technology Co., Ltd.
     * 保留所有权利 All Rights Reserved.
     * /home/ryan/workspace/nova/nova-admin/dist/fmode-ng/esm2022/lib/storage/service-upload/util-file-metadata.mjs
     */
    export async function getFileMetadata(t){const a={name:t.name,size:t.size,type:t.type,lastModified:t.lastModified,metadata:{}};return a.metadata.lastModified=t.lastModified,t.type.startsWith("image/")?await extractImageMetadata(t,a.metadata):(t.type.startsWith("audio/")||t.type.startsWith("video/"))&&await extractMediaMetadata(t,a.metadata),a}async function extractImageMetadata(t,a){try{const e=new Image,i=URL.createObjectURL(t);await new Promise(((t,a)=>{e.onload=()=>t(),e.onerror=a,e.src=i})),a.width=e.naturalWidth,a.height=e.naturalHeight;try{const e=await t.arrayBuffer(),i=await parseExifData(e);i&&Object.assign(a,i)}catch(t){console.warn("无法解析EXIF数据:",t)}URL.revokeObjectURL(i)}catch(t){console.error("提取图片元数据失败:",t)}}async function extractMediaMetadata(t,a){try{const e=t.type.startsWith("audio/")?new Audio:document.createElement("video"),i=URL.createObjectURL(t);await new Promise(((t,a)=>{e.onloadedmetadata=()=>t(),e.onerror=a,e.src=i})),a.duration=e.duration,"videoWidth"in e&&(a.width=e.videoWidth),"videoHeight"in e&&(a.height=e.videoHeight),URL.revokeObjectURL(i)}catch(t){console.error("提取媒体元数据失败:",t)}}async function parseExifData(t){const a=new DataView(t);return 65496!==a.getUint16(0)?null:{colorDepth:24,orientation:a.getUint16(16,!1)||1}}
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