import { RcFile, UploadFile, InternalUploadFile } from './interface'; export function file2Obj(file: RcFile): InternalUploadFile { return { ...file, lastModified: file.lastModified, lastModifiedDate: file.lastModifiedDate, name: file.name, size: file.size, type: file.type, uid: file.uid, percent: 0, originFileObj: file, }; } /** Upload fileList. Replace file if exist or just push into it. */ export function updateFileList(file: UploadFile<any>, fileList: UploadFile<any>[]) { const nextFileList = [...fileList]; const fileIndex = nextFileList.findIndex(({ uid }: UploadFile) => uid === file.uid); if (fileIndex === -1) { nextFileList.push(file); } else { nextFileList[fileIndex] = file; } return nextFileList; } export function getFileItem(file: RcFile, fileList: UploadFile[]) { const matchKey = file.uid !== undefined ? 'uid' : 'name'; return fileList.filter(item => item[matchKey] === file[matchKey])[0]; } export function removeFileItem(file: UploadFile, fileList: UploadFile[]) { const matchKey = file.uid !== undefined ? 'uid' : 'name'; const removed = fileList.filter(item => item[matchKey] !== file[matchKey]); if (removed.length === fileList.length) { return null; } return removed; } // ==================== Default Image Preview ==================== const extname = (url: string = '') => { const temp = url.split('/'); const filename = temp[temp.length - 1]; const filenameWithoutSuffix = filename.split(/#|\?/)[0]; return (/\.[^./\\]*$/.exec(filenameWithoutSuffix) || [''])[0]; }; const isImageFileType = (type: string): boolean => type.indexOf('image/') === 0; export const isImageUrl = (file: UploadFile): boolean => { if (file.type && !file.thumbUrl) { return isImageFileType(file.type); } const url: string = (file.thumbUrl || file.url || '') as string; const extension = extname(url); if ( /^data:image\//.test(url) || /(webp|svg|png|gif|jpg|jpeg|jfif|bmp|dpg|ico)$/i.test(extension) ) { return true; } if (/^data:/.test(url)) { // other file types of base64 return false; } if (extension) { // other file types which have extension return false; } return true; }; const MEASURE_SIZE = 200; export function previewImage(file: File | Blob): Promise<string> { return new Promise(resolve => { if (!file.type || !isImageFileType(file.type)) { resolve(''); return; } const canvas = document.createElement('canvas'); canvas.width = MEASURE_SIZE; canvas.height = MEASURE_SIZE; canvas.style.cssText = `position: fixed; left: 0; top: 0; width: ${MEASURE_SIZE}px; height: ${MEASURE_SIZE}px; z-index: 9999; display: none;`; document.body.appendChild(canvas); const ctx = canvas.getContext('2d'); const img = new Image(); img.onload = () => { const { width, height } = img; let drawWidth = MEASURE_SIZE; let drawHeight = MEASURE_SIZE; let offsetX = 0; let offsetY = 0; if (width > height) { drawHeight = height * (MEASURE_SIZE / width); offsetY = -(drawHeight - drawWidth) / 2; } else { drawWidth = width * (MEASURE_SIZE / height); offsetX = -(drawWidth - drawHeight) / 2; } ctx!.drawImage(img, offsetX, offsetY, drawWidth, drawHeight); const dataURL = canvas.toDataURL(); document.body.removeChild(canvas); resolve(dataURL); }; img.src = window.URL.createObjectURL(file); }); }