UploadQueue.md

Upload Queue

A more detailed demo with code can be found in this post: hooked on file uploads with react-uploady and here: React Uploady with Ant Design

import React, { useCallback, useState, memo } from "react";
import styled from "styled-components";
import { Circle } from "rc-progress";
import Uploady, {
   useItemProgressListener,
   useItemAbortListener,
   useItemErrorListener,
   useAbortItem,
} from "@rpldy/uploady";
import UploadButton from "@rpldy/upload-button";
import UploadPreview from "@rpldy/upload-preview";
import retryEnhancer, { useRetry } from "@rpldy/retry-hooks";

const STATES = {
   PROGRESS: "PROGRESS",
   DONE: "DONE",
   ABORTED: "ABORTED",
   ERROR: "ERROR",
};

const STATE_COLORS = {
   [STATES.PROGRESS]: "#f4e4a4",
   [STATES.DONE]: "#a5f7b3",
   [STATES.ABORTED]: "#f7cdcd",
   [STATES.ERROR]: "#ee4c4c",
};



const StyledCircle = styled(Circle)`
 width: 32px;
 height: 32px;
`;

const PreviewsContainer = styled.div`
 width: 100%;
 display: flex;
 flex-wrap: wrap;
 border-top: 1px solid #0c86c1;
 margin-top: 10px;
`;

const PreviewImageWrapper = styled.div`
 height: 150px;
 text-align: center;
 width: 100%;
`;

const PreviewImage = styled.img`
 max-width: 200px;
 height: auto;
 max-height: 140px;
`;

const PreviewItemContainer = styled.div`
 width: 220px;
 padding: 10px;
 display: flex;
 flex-direction: column;
 box-shadow: ${({ state }) => (state ? STATE_COLORS[state] : "#c3d2dd")} 0px
   8px 5px -2px;
 position: relative;
 align-items: center;
 margin: 0 10px 10px 0;
`;

const ImageName = styled.span`
 position: absolute;
 top: 10px;
 font-size: 12px;
 padding: 3px;
 background-color: #25455bab;
 width: 180px;
 white-space: nowrap;
 overflow: hidden;
 text-overflow: ellipsis;
 color: #fff;
`;

const PreviewItemBar = styled.div`
 display: flex;
 align-items: center;
 justify-content: space-between;
 padding: 10px 0;
 width: 100%;
 box-shadow: #5dbdec 0px -3px 2px -2px;
`;

const ItemButtons = styled.div`
 button {
   width: 52px;
   height: 34px;
   font-size: 26px;
   line-height: 26px;
   cursor: pointer;
   margin-right: 4px;

   :disabled {
     cursor: not-allowed;
     background-color: grey;
     color: grey;
   }
 }
`;

const AbortButton = ({ id, state }) => {
   const abortItem = useAbortItem();
   const onAbort = useCallback(() => abortItem(id), [id, abortItem]);

   return (
       <button
           disabled={state === STATES.ABORTED || state === STATES.DONE}
           onClick={onAbort}
       >
           🛑
       </button>
   );
};

const RetryButton = ({ id, state }) => {
   const retry = useRetry();
   const onRetry = useCallback(() => retry(id), [id, retry]);

   return (
       <button disabled={state !== STATES.ABORTED} onClick={onRetry}>
           🔃
       </button>
   );
};

const QueueItem = memo((props) => {
   const [progress, setProgress] = useState(0);
   const [itemState, setItemState] = useState(0);

   useItemProgressListener(item => {
       if (item.completed > progress) {
           setProgress(() => item.completed);
           setItemState(() =>
               item.completed === 100 ? STATES.DONE : STATES.PROGRESS
           );
       }
   }, props.id);

   useItemAbortListener((item) => {
       setItemState(STATES.ABORTED);
   }, props.id);

   useItemErrorListener((item) =>{
       setItemState(STATES.ERROR);
   }, props.id);

   return (
       <PreviewItemContainer state={itemState}>
           <ImageName>{props.name}</ImageName>
           <PreviewImageWrapper>
               <PreviewImage src={props.url} />
           </PreviewImageWrapper>
           <PreviewItemBar>
               <ItemButtons>
                   <AbortButton id={props.id} state={itemState} />
                   <RetryButton id={props.id} state={itemState} />
               </ItemButtons>
               <StyledCircle
                   strokeWidth={4}
                   percent={progress}
                   strokeColor={progress === 100 ? "#00a626" : "#2db7f5"}
               />
           </PreviewItemBar>
       </PreviewItemContainer>
   );
});

export const MyApp = () => (
       <Uploady
           destination={{url: "my-server.com/upload"}}
           enhancer={retryEnhancer}
       >           
               <UploadButton>Upload Files</UploadButton>

               <PreviewsContainer>
                   <UploadPreview
                       rememberPreviousBatches
                       PreviewComponent={QueueItem}
                   />
               </PreviewsContainer>
       </Uploady>);