making the grouped table list flat to prepare for virtualization

webapp/src/components/table/table.tsx

@@ -224,6 +224,7 @@ const Table = (props: Props): JSX.Element => {
                             addCard={props.addCard}
                             onCardClicked={props.onCardClicked}
                             onDrop={onDropToCard}
+                            useVirtualizedList={true}
                         />
                         }
                     </div>

webapp/src/components/table/tableGroup.tsx

@@ -32,31 +32,9 @@ type Props = {
 
 const TableGroup = (props: Props): JSX.Element => {
     const {board, activeView, group, onDropToGroup, groupByProperty} = props
-    const groupId = group.option.id
-
-    const [{isOver}, drop] = useDrop(() => ({
-        accept: 'card',
-        collect: (monitor) => ({
-            isOver: monitor.isOver(),
-        }),
-        drop: (item: Card, monitor) => {
-            if (monitor.isOver({shallow: true})) {
-                onDropToGroup(item, groupId, '')
-            }
-        },
-    }), [onDropToGroup, groupId])
-
-    let className = 'octo-table-group'
-    if (isOver) {
-        className += ' dragover'
-    }
 
     return (
-        <div
+        <>
-            ref={drop}
-            className={className}
-            key={group.option.id}
-        >
             <TableGroupHeaderRow
                 group={group}
                 board={board}
@@ -67,6 +45,8 @@ const TableGroup = (props: Props): JSX.Element => {
                 readonly={props.readonly}
                 propertyNameChanged={props.propertyNameChanged}
                 onDrop={props.onDropToGroupHeader}
+                key={group.option.id}
+                onDropToGroup={onDropToGroup}
             />
 
             {(group.cards.length > 0) &&
@@ -81,8 +61,10 @@ const TableGroup = (props: Props): JSX.Element => {
                 addCard={props.addCard}
                 onCardClicked={props.onCardClicked}
                 onDrop={props.onDropToCard}
+                useVirtualizedList={false}
             />}
-        </div>
+        </>
+            
     )
 }
 

webapp/src/components/table/tableGroupHeaderRow.test.tsx

@@ -71,6 +71,7 @@ test('should match snapshot, no groups', async () => {
                     type: 'text',
                     options: [{id: 'property1', value: 'Property 1', color: ''}],
                 }}
+                onDropToGroup={jest.fn()}
             />
         </Wrapper>,
     )
@@ -89,6 +90,7 @@ test('should match snapshot with Group', async () => {
                 addCard={jest.fn()}
                 propertyNameChanged={jest.fn()}
                 onDrop={jest.fn()}
+                onDropToGroup={jest.fn()}
             />
         </Wrapper>,
     )
@@ -107,6 +109,7 @@ test('should match snapshot on read only', async () => {
                 addCard={jest.fn()}
                 propertyNameChanged={jest.fn()}
                 onDrop={jest.fn()}
+                onDropToGroup={jest.fn()}
             />
         </Wrapper>,
     )
@@ -130,6 +133,7 @@ test('should match snapshot, hide group', async () => {
                 addCard={jest.fn()}
                 propertyNameChanged={jest.fn()}
                 onDrop={jest.fn()}
+                onDropToGroup={jest.fn()}
             />
         </Wrapper>,
     )
@@ -158,6 +162,7 @@ test('should match snapshot, add new', async () => {
                 addCard={addNew}
                 propertyNameChanged={jest.fn()}
                 onDrop={jest.fn()}
+                onDropToGroup={jest.fn()}
             />
         </Wrapper>,
     )
@@ -184,6 +189,7 @@ test('should match snapshot, edit title', async () => {
                 addCard={jest.fn()}
                 propertyNameChanged={jest.fn()}
                 onDrop={jest.fn()}
+                onDropToGroup={jest.fn()}
             />
         </Wrapper>,
     )

webapp/src/components/table/tableGroupHeaderRow.tsx

@@ -1,13 +1,14 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 /* eslint-disable max-lines */
-import React, {useState, useEffect} from 'react'
+import React, {useState, useEffect, useRef} from 'react'
 import {FormattedMessage, useIntl} from 'react-intl'
+import {useDrag, useDrop} from 'react-dnd'
 
 import {Constants} from '../../constants'
 import {IPropertyOption, Board, IPropertyTemplate, BoardGroup} from '../../blocks/board'
 import {BoardView} from '../../blocks/boardView'
-import {useSortable} from '../../hooks/sortable'
+import {Card} from '../../blocks/card'
 import mutator from '../../mutator'
 import Button from '../../widgets/buttons/button'
 import IconButton from '../../widgets/buttons/iconButton'
@@ -33,13 +34,42 @@ type Props = {
     addCard: (groupByOptionId?: string) => Promise<void>
     propertyNameChanged: (option: IPropertyOption, text: string) => Promise<void>
     onDrop: (srcOption: IPropertyOption, dstOption?: IPropertyOption) => void
+    onDropToGroup: (srcCard: Card, groupID: string, dstCardID: string) => void
 }
 
 const TableGroupHeaderRow = (props: Props): JSX.Element => {
     const {board, activeView, group, groupByProperty} = props
     const [groupTitle, setGroupTitle] = useState(group.option.value)
 
-    const [isDragging, isOver, groupHeaderRef] = useSortable('groupHeader', group.option, !props.readonly, props.onDrop)
+    const ref = useRef<HTMLDivElement>(null)
+    const [{isDragging}, drag] = useDrag(() => ({
+        type: 'groupHeader',
+        item: group.option,
+        collect: (monitor) => ({
+            isDragging: monitor.isDragging(),
+        }),
+        canDrag: () => !props.readonly,
+    }), ['groupHeader', group.option, props.readonly])
+
+    const [{isOver}, drop] = useDrop(() => ({
+        accept: ['groupHeader', 'card'],
+        collect: (monitor) => ({
+            isOver: monitor.isOver(),
+        }),
+        drop: (dragItem: IPropertyOption | Card, monitor) => {
+            // @ts-ignore
+            if (dragItem?.type === 'card' && monitor.isOver({shallow: true})) {
+                // @ts-ignore
+                props.onDropToGroup(dragItem, group.option.id, '')
+                return;
+            }
+            // @ts-ignore
+            props.onDrop(dragItem, group.option)
+        },
+        canDrop: () => !props.readonly,
+    }), [group.option, props.onDrop, props.readonly])
+    drop(drag(ref))
+
     const intl = useIntl()
     const columnResize = useColumnResize()
 
@@ -59,7 +89,7 @@ const TableGroupHeaderRow = (props: Props): JSX.Element => {
     return (
         <div
             key={group.option.id + 'header'}
-            ref={groupHeaderRef}
+            ref={ref}
             style={{opacity: isDragging ? 0.5 : 1}}
             className={className}
         >

webapp/src/components/table/tableRows.test.tsx

@@ -74,6 +74,7 @@ describe('components/table/TableRows', () => {
                         addCard={addCard}
                         onCardClicked={jest.fn()}
                         onDrop={jest.fn()}
+                        useVirtualizedList={false}
                     />
                 </ColumnResizeProvider>
             </ReduxProvider>,

webapp/src/components/table/tableRows.tsx

@@ -1,8 +1,8 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
 import React, {useCallback} from 'react'
-import {FixedSizeList, ListChildComponentProps} from 'react-window';
+import {FixedSizeList, ListChildComponentProps} from 'react-window'
-import AutoSizer from 'react-virtualized-auto-sizer';
+import AutoSizer from 'react-virtualized-auto-sizer'
 
 import {Card} from '../../blocks/card'
 import {Board} from '../../blocks/board'
@@ -23,21 +23,50 @@ type Props = {
     addCard: (groupByOptionId?: string) => Promise<void>
     onCardClicked: (e: React.MouseEvent, card: Card) => void
     onDrop: (srcCard: Card, dstCard: Card) => void
+    useVirtualizedList: boolean
 }
 
 const TableRows = (props: Props): JSX.Element => {
-    const {board, cards, activeView} = props
+    const {board, cards, activeView, useVirtualizedList} = props
 
     const onClickRow = useCallback((e: React.MouseEvent<HTMLDivElement>, card: Card) => {
         props.onCardClicked(e, card)
     }, [props.onCardClicked])
 
+    if (!useVirtualizedList) {
+        return (
+            <>
+                {cards.map((card, idx) => {
+                    return (
+                        <TableRow
+                            key={card.id + card.updateAt}
+                            board={board}
+                            columnWidths={activeView.fields.columnWidths}
+                            isManualSort={activeView.fields.sortOptions.length === 0}
+                            groupById={activeView.fields.groupById}
+                            visiblePropertyIds={activeView.fields.visiblePropertyIds}
+                            collapsedOptionIds={activeView.fields.collapsedOptionIds}
+                            card={card}
+                            addCard={props.addCard}
+                            isSelected={props.selectedCardIds.includes(card.id)}
+                            focusOnMount={props.cardIdToFocusOnRender === card.id}
+                            isLastCard={idx === (cards.length - 1)}
+                            onClick={onClickRow}
+                            showCard={props.showCard}
+                            readonly={props.readonly}
+                            onDrop={props.onDrop}
+                        />
+                    )
+                })}
+            </>
+        )
+    }
+
     const isItemLoaded = (index: number) => {
         return index < cards.length;
-    };
+    }
 
     const Item = ({index, style}: ListChildComponentProps) => {
-        
         const card = cards[index]
         if (isItemLoaded(index)) {
             return (
@@ -72,13 +101,13 @@ const TableRows = (props: Props): JSX.Element => {
     }
 
     return (
-        <AutoSizer>
+        <AutoSizer disableWidth>
-            {({height, width}) => (
+            {({height}) => (
                 <FixedSizeList
                     height={height}
                     itemCount={1828}
                     itemSize={44}
-                    width={width}
+                    width={'100%'}
                 >
                     {Item}
                 </FixedSizeList>