roger - no ticket - Fileuploadv2bis

src/Containers/DropArea/DropArea.tsx

@@ -54,7 +54,7 @@ export interface IDropAreaProps extends DropzoneType {
     dropzoneProps?: DropzoneOptions;
 }
 
-export const DropArea: React.FC<IDropAreaProps> = ({
+export const DropArea = React.forwardRef<HTMLDivElement,IDropAreaProps>(({
     message = 'Drag & Drop your files here',
     buttonText = 'Browse Files',
     onClickHandler = () => null,
@@ -66,7 +66,7 @@ export const DropArea: React.FC<IDropAreaProps> = ({
     width,
     dropzoneProps = {},
     ...props
-}): React.ReactElement => {
+},dropAreaRef): React.ReactElement => {
     const { getInputProps, getRootProps, isDragActive, open } = useDropzone({
         onDragEnter,
         onDragLeave,
@@ -95,7 +95,7 @@ export const DropArea: React.FC<IDropAreaProps> = ({
     return (
         <Dropzone multiple {...props}>
             {() => (
-                <RootDiv {...getRootProps({})} isDisabled={isDisabled}>
+                <RootDiv {...getRootProps({})} isDisabled={isDisabled} ref={dropAreaRef}>
                     <DropAreaBox
                         isDragEnter={isDragActive}
                         width={width}
@@ -118,7 +118,7 @@ export const DropArea: React.FC<IDropAreaProps> = ({
             )}
         </Dropzone>
     );
-};
+});
 
 const RootDiv = styled.div<{ isDisabled: boolean }>`
     width: fit-content;

src/Containers/FileUploadV2/FileUploadV2.stories.tsx

@@ -0,0 +1,24 @@
+import React from 'react';
+import { Meta, Story } from '@storybook/react';
+import { FileUploadV2, IFileUploadV2Props } from './FileUploadV2';
+
+export default {
+    title: 'Components/FileUploadV2',
+    component: FileUploadV2,
+    args: {
+        onFile:(base64StringFile:string)=>{console.log(base64StringFile)},
+        dropAreaProps:{
+            width:400
+        }
+    },
+} as Meta;
+
+export const Basic: Story<IFileUploadV2Props> = (args) => (
+    <FileUploadV2 {...args} />
+);
+
+export const TestIsFailure = Basic.bind({});
+TestIsFailure.args = {
+    ...Basic.args,
+    isTestIsFailure:true
+};

src/Containers/FileUploadV2/FileUploadV2.tsx

@@ -0,0 +1,256 @@
+import React, { useState, useCallback, useEffect,useRef } from 'react';
+import styled from 'styled-components';
+// @ts-ignore
+import worker from 'workerize-loader!./worker'; // eslint-disable-line
+import { useMounted } from '@Utils/Hooks';
+import { MainInterface, Main } from '@Utils/BaseStyles';
+import {Button} from '@Inputs/Button/Button';
+import { PanelCard,OperationState } from '../PanelCard/PanelCard';
+import {DropArea,IDropAreaProps} from '../DropArea/DropArea';
+
+// TODO: Add animations if possible (height transitions of the container component (expansion-contraction))
+// and fade-in, fade-out effect of the informative panels.
+
+const MESSAGE_DURATION = 1500;
+const NO_BASE64STRINGFILE = 'NO_BASE64STRINGFILE';
+
+interface IPanel {
+    /** whether it's loading file, is completed, is failure */
+    operationState: OperationState;
+    /** name of file associated with the informative panel */
+    name: string;
+    /** worker; will do the job of reading the file */
+    worker: Worker | null;
+    /** the file associated with the informative panel */
+    file: File | null;
+}
+
+interface IInformativePanels {
+    /** array of panels */
+    panels: IPanel[];
+    /** names of files already uploaded, or failed, or cancelled */
+    makeItDisappear: string[];
+    /** names of files for which we want to start workers */
+    startWorkers: string[];
+}
+
+export interface IFileUploadV2Props
+    extends MainInterface,
+        React.HTMLAttributes<HTMLDivElement> {
+    /** if true, failure message will appear even after success operation; its purpose is to test the appearance of the failure message during development */
+    isTestIsFailure?: boolean;
+    /**
+     * function to process the file read and transformed to a base64 string; default: does nothing
+     * @param {string} base64String the file read and transformed to a base64 string
+     */
+    onFile?: (base64String: string) => void;
+    /** time in ms of the presence of the bottom panel informing the result of the operation (sucess or failure); default value: 1500  */
+    messageDuration?: number;
+    dropAreaProps?:IDropAreaProps;
+}
+/**
+ * multiple file upload, in parallel, version 2
+ */
+export const FileUploadV2: React.FC<IFileUploadV2Props> = ({
+    isTestIsFailure = false,
+    onFile = (base64String: string) => null,
+    messageDuration = MESSAGE_DURATION,
+    dropAreaProps={},
+    ...props
+}): React.ReactElement => {
+    const isMounted = useMounted();
+    const [informativePanels, setInformativePanels] =
+        useState<IInformativePanels>({
+            panels: [],
+            makeItDisappear: [],
+            startWorkers: [],
+        });
+    const [dropAreaWidth, setDropAreaWidth] = useState<number|undefined>();
+    const dropAreaRef=useRef<HTMLDivElement>(null);
+
+    /**
+     * set end state
+     */
+    const prepareForEndInformativePanel = useCallback(
+        (operationState: OperationState, informativePanel: IPanel): void => {
+            setInformativePanels((prev) => ({
+                ...prev,
+                panels: prev.panels.map((panel) => {
+                    if (panel.name === informativePanel.name)
+                        return {
+                            ...panel,
+                            operationState,
+                        };
+                    return panel;
+                }),
+                makeItDisappear: [
+                    ...prev.makeItDisappear,
+                    informativePanel.name,
+                ],
+            }));
+        },
+        [],
+    );
+
+    /**
+     * terminate worker and set state of informative panel to success or failure and
+     * send order to remove informative panel in the future. also do whatever user
+     * wants to do with the file read in case of success
+     */
+    const onWorkerMessage = useCallback(
+        (e: any) => {
+            const { base64StringFile, name } = e.data;
+            if (base64StringFile === undefined) {
+                return;
+            }
+            const informativePanel = informativePanels.panels.find(
+                (panel) => panel.name === name,
+            );
+            if (informativePanel) {
+                if (
+                    base64StringFile === NO_BASE64STRINGFILE ||
+                    isTestIsFailure
+                ) {
+                    prepareForEndInformativePanel(
+                        OperationState.isFailure,
+                        informativePanel,
+                    );
+                } else {
+                    onFile(base64StringFile);
+                    prepareForEndInformativePanel(
+                        OperationState.isSuccess,
+                        informativePanel,
+                    );
+                }
+            }
+        },
+        [
+            informativePanels.panels,
+            isTestIsFailure,
+            onFile,
+            prepareForEndInformativePanel,
+        ],
+    );
+
+    /**
+     * load array of informative panels and send order to start workers
+     */
+    const onDrop = useCallback((acceptedFiles: File[]) => {
+        const newInformativePanels = acceptedFiles.map((file) => {
+            const workerInstance = worker();
+            return {
+                operationState: OperationState.isLoading,
+                name: file.name,
+                worker: workerInstance,
+                file,
+            };
+        });
+        const fileNames = acceptedFiles.map((file) => file.name);
+        setInformativePanels((prev) => ({
+            ...prev,
+            panels: [...prev.panels, ...newInformativePanels],
+            startWorkers: [...fileNames],
+        }));
+    }, []);
+
+    // start workers after files have been droped and array of informative panels
+    // are loaded
+    useEffect(() => {
+        if (informativePanels.startWorkers.length) {
+            informativePanels.startWorkers.forEach((name) => {
+                const informativePanel = informativePanels.panels.find(
+                    (panel) => panel.name === name,
+                );
+                if (informativePanel && informativePanel.worker) {
+                    informativePanel.worker.onmessage = onWorkerMessage;
+                    informativePanel.worker?.postMessage({
+                        file: informativePanel.file,
+                    });
+                }
+            });
+            setInformativePanels((prev) => ({
+                ...prev,
+                startWorkers: [],
+            }));
+        }
+    }, [informativePanels.startWorkers.length]);
+
+    // make disappear informative panels in the future
+    useEffect(() => {
+        if (informativePanels.makeItDisappear.length) {
+            informativePanels.makeItDisappear.forEach((name) => {
+                setTimeout(() => {
+                    if (isMounted.current) {
+                        setInformativePanels((prev) => ({
+                            ...prev,
+                            panels: prev.panels.filter((panel) => {
+                                if (panel.name === name) {
+                                    panel.worker?.terminate();
+                                    return false;
+                                }
+                                return true;
+                            }),
+                            makeItDisappear: prev.makeItDisappear.filter(
+                                (name_) => name_ !== name,
+                            ),
+                        }));
+                    }
+                }, messageDuration);
+            });
+        }
+    }, [informativePanels.makeItDisappear.length]);
+
+    const onCancelUploading = (name: string) => () => {
+        setInformativePanels((prev) => ({
+            ...prev,
+            panels: prev.panels.filter((panel) => {
+                if (panel.name === name) {
+                    panel.worker?.terminate();
+                    return false;
+                }
+                return true;
+            }),
+        }));
+    };
+
+    // terminate workers on clean up function
+    useEffect(
+        () => () => {
+            if (!isMounted.current) {
+                informativePanels.panels.forEach((panel) =>
+                    panel.worker?.terminate(),
+                );
+            }
+        },
+        [informativePanels.panels],
+    );
+
+    useEffect(()=>{
+        if(dropAreaRef.current){
+            setDropAreaWidth(dropAreaRef.current.getBoundingClientRect().width);
+        }
+    },[])
+
+    return (
+        <FileUploadV2Container {...props}>
+            <DropArea onDropHandler={onDrop} {...dropAreaProps} ref={dropAreaRef} />
+            {informativePanels.panels.map((panel) => (
+                <PanelCard
+                    key={panel.name}
+                    cancelButtonOnLoading={<Button onClick={onCancelUploading(panel.name)}>Cancel</Button>}
+                    name={panel.name}
+                    operationState={panel.operationState}
+                    margin="10px 0"
+                    style={{width:dropAreaWidth,boxSizing:'border-box'}}
+                />
+            ))}
+        </FileUploadV2Container>
+    );
+};
+
+const FileUploadV2Container = styled.div<MainInterface>`
+    background-color: ${({theme})=>theme.colors.background};
+    border-radius: ${({theme})=>theme.dimensions.radius};
+    width: fit-content;
+    ${({theme,...props }): string => Main({ padding:theme.dimensions.padding.container,...props })}
+`;

src/Containers/FileUploadV2/worker.ts

@@ -0,0 +1,24 @@
+onmessage = (e) => {
+    const { file } = e.data;
+    const reader = new FileReader();
+    reader.onload = () => {
+        let base64StringFile = 'NO_BASE64STRINGFILE';
+        if (reader.result) {
+            if (typeof reader.result === 'string') {
+                base64StringFile = btoa(reader.result);
+            } else {
+                const bytes = Array.from(new Uint8Array(reader.result));
+                base64StringFile = btoa(
+                    bytes.map((item) => String.fromCharCode(item)).join(''),
+                );
+            }
+        }
+        postMessage({ base64StringFile,name:file.name });
+    };
+    try{
+        reader.readAsArrayBuffer(file);
+    }catch(error){
+        console.log(error);
+        postMessage({});
+    }
+};

src/Containers/index.ts

@@ -99,3 +99,4 @@ export * from './StoreSelector/StoreSelector';
 export * from './ScreenFlashEffect/ScreenFlashEffect'; 
 export * from './PanelCard/PanelCard';
 export * from './DropArea/DropArea';
+export * from './FileUploadV2/FileUploadV2';