{
  "version": 3,
  "sources": ["../../src/hooks/use-data.ts"],
  "sourcesContent": ["/**\n * WordPress dependencies\n */\nimport { useState, useEffect, useMemo, useRef } from '@wordpress/element';\n\n/**\n * Internal dependencies\n */\nimport type { View } from '../types';\n\ntype PaginationInfo = {\n\ttotalItems: number;\n\ttotalPages: number;\n};\n\ninterface UseDataParams< Item > {\n\tview: View;\n\tdata: Item[];\n\tgetItemId: ( item: Item ) => string;\n\tisLoading?: boolean;\n\tpaginationInfo: PaginationInfo;\n\tselection?: string[];\n}\n\ninterface UseDataResult< Item > {\n\tdata: ( Item & { position?: number } )[];\n\tpaginationInfo: PaginationInfo;\n\thasInitiallyLoaded: boolean;\n\tsetVisibleEntries?: React.Dispatch< React.SetStateAction< number[] > >;\n}\n\n/**\n * Hook to manage data for DataViews.\n *\n * When infinite scroll is enabled, this hook handles:\n * - Loading more data when scrolling up or down\n * - Maintaining stable positions for items\n * - Unloading items that are no longer visible (with a buffer)\n *\n * When infinite scroll is disabled, it preserves the previous data and\n * pagination info while loading, so the UI doesn't flash empty.\n *\n * In both cases, it tracks whether data has initially loaded.\n *\n * @param params                - Configuration parameters\n * @param params.view           - Current view configuration\n * @param params.data           - Current page of data\n * @param params.getItemId      - Function to extract item ID\n * @param params.isLoading      - Whether data is currently loading\n * @param params.paginationInfo - Pagination info (totalItems, totalPages)\n * @param params.selection      - Currently selected item IDs\n * @return Object containing data, paginationInfo, hasInitiallyLoaded,\n *         and optional setVisibleEntries callback\n */\nexport default function useData< Item >( {\n\tview,\n\tdata: shownData,\n\tgetItemId,\n\tisLoading,\n\tpaginationInfo,\n\tselection,\n}: UseDataParams< Item > ): UseDataResult< Item > {\n\tconst isInfiniteScrollEnabled = view.infiniteScrollEnabled;\n\n\tconst [ hasInitiallyLoaded, setHasInitiallyLoaded ] = useState(\n\t\t! isLoading\n\t);\n\tuseEffect( () => {\n\t\tif ( ! isLoading ) {\n\t\t\tsetHasInitiallyLoaded( true );\n\t\t}\n\t}, [ isLoading ] );\n\n\tconst previousDataRef = useRef< Item[] >( shownData );\n\tconst previousPaginationInfoRef =\n\t\tuseRef< PaginationInfo >( paginationInfo );\n\tuseEffect( () => {\n\t\tif ( ! isLoading ) {\n\t\t\tpreviousDataRef.current = shownData;\n\t\t\tpreviousPaginationInfoRef.current = paginationInfo;\n\t\t}\n\t}, [ shownData, isLoading, paginationInfo ] );\n\n\t// Infinite scroll state.\n\tconst [ visibleEntries, setVisibleEntries ] = useState< number[] >( [] );\n\n\t// Track the mapping of item IDs to their positions in the full dataset\n\tconst positionMapRef = useRef< Map< string, number > >( new Map() );\n\n\t// Store accumulated records in a ref for persistence across renders\n\tconst allLoadedRecordsRef = useRef< Item[] >( [] );\n\n\t// Track previous view parameters to detect when we need to reset\n\tconst prevViewParamsRef = useRef< {\n\t\tsearch: string | undefined;\n\t\tfilters: string | undefined;\n\t\tperPage: number | undefined;\n\t} >( {\n\t\tsearch: undefined,\n\t\tfilters: undefined,\n\t\tperPage: undefined,\n\t} );\n\n\t// Determine scroll direction based on position changes\n\tconst scrollDirectionRef = useRef< 'up' | 'down' | undefined >( undefined );\n\tconst prevStartPositionRef = useRef< number | undefined >( undefined );\n\n\t// Track whether we've done initial load\n\tconst hasInitializedRef = useRef( false );\n\n\t// Compute data synchronously during render using useMemo\n\t// This ensures the returned data is always in sync with shownData\n\tconst allLoadedRecords = useMemo( () => {\n\t\t// Update scroll direction based on position changes\n\t\tif (\n\t\t\tview.startPosition !== undefined &&\n\t\t\tprevStartPositionRef.current !== undefined\n\t\t) {\n\t\t\tif ( view.startPosition < prevStartPositionRef.current ) {\n\t\t\t\tscrollDirectionRef.current = 'up';\n\t\t\t} else if ( view.startPosition > prevStartPositionRef.current ) {\n\t\t\t\tscrollDirectionRef.current = 'down';\n\t\t\t}\n\t\t}\n\t\tprevStartPositionRef.current = view.startPosition;\n\n\t\t// Serialize filters for comparison\n\t\tconst currentFiltersKey = JSON.stringify( view.filters ?? [] );\n\t\tconst prevFiltersKey = prevViewParamsRef.current.filters;\n\n\t\t// Check if view parameters that require a reset have changed\n\t\tconst shouldReset =\n\t\t\t! hasInitializedRef.current ||\n\t\t\t! view.infiniteScrollEnabled ||\n\t\t\tview.search !== prevViewParamsRef.current.search ||\n\t\t\tcurrentFiltersKey !== prevFiltersKey ||\n\t\t\tview.perPage !== prevViewParamsRef.current.perPage;\n\t\thasInitializedRef.current = true;\n\t\t// Update tracked view parameters\n\t\tprevViewParamsRef.current = {\n\t\t\tsearch: view.search,\n\t\t\tfilters: currentFiltersKey,\n\t\t\tperPage: view.perPage,\n\t\t};\n\n\t\tif ( shouldReset ) {\n\t\t\t// Reset - clear position map and replace all data\n\t\t\tpositionMapRef.current.clear();\n\t\t\t// Reset scroll direction to prevent stale directional filtering\n\t\t\tscrollDirectionRef.current = undefined;\n\t\t\t// Use the view's startPosition if defined, otherwise default to 1\n\t\t\tconst startPosition = view.search ? 1 : view.startPosition ?? 1;\n\t\t\tconst records = shownData.map( ( record, index ) => {\n\t\t\t\tconst position = startPosition + index;\n\t\t\t\tpositionMapRef.current.set( getItemId( record ), position );\n\t\t\t\treturn {\n\t\t\t\t\t...record,\n\t\t\t\t\tposition,\n\t\t\t\t};\n\t\t\t} );\n\t\t\tallLoadedRecordsRef.current = records;\n\t\t\treturn records;\n\t\t}\n\n\t\t// Subsequent pages - merge with existing data\n\t\tconst prev = allLoadedRecordsRef.current;\n\t\tconst shownDataIds = new Set( shownData.map( getItemId ) );\n\t\tconst scrollDirection = scrollDirectionRef.current;\n\n\t\t// The position for each item in shownData should be based on the\n\t\t// current startPosition from the view, which reflects the actual\n\t\t// offset in the dataset. This ensures aria-posinset values are\n\t\t// semantically correct - if startPosition is 40, there are exactly\n\t\t// 39 items before the first item in shownData.\n\t\t// When there's an active search, always start from position 1 since\n\t\t// search results are a filtered subset, not a paginated view.\n\t\tconst basePosition = view.search ? 1 : view.startPosition ?? 1;\n\t\tconst newRecords = shownData.map( ( record, index ) => {\n\t\t\tconst itemId = getItemId( record );\n\t\t\tconst position = view.infiniteScrollEnabled\n\t\t\t\t? basePosition + index\n\t\t\t\t: undefined;\n\n\t\t\t// Always update the position map with the correct position\n\t\t\t// based on the current query's startPosition\n\t\t\tif ( position !== undefined ) {\n\t\t\t\tpositionMapRef.current.set( itemId, position );\n\t\t\t}\n\n\t\t\treturn {\n\t\t\t\t...record,\n\t\t\t\tposition,\n\t\t\t};\n\t\t} );\n\n\t\tif ( newRecords.length === 0 ) {\n\t\t\treturn prev;\n\t\t}\n\n\t\t// Remove duplicates from prev, keeping only records not in shownData\n\t\tconst prevWithoutDuplicates = prev.filter(\n\t\t\t( record ) => ! shownDataIds.has( getItemId( record ) )\n\t\t);\n\n\t\t// Update the loaded range\n\t\tconst allRecords =\n\t\t\tscrollDirection === 'up'\n\t\t\t\t? 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(\n\t\t\t\tmaxRecordPos < visibleMin - buffer ||\n\t\t\t\tminRecordPos > visibleMax + buffer\n\t\t\t);\n\n\t\t\tif ( hasOverlap ) {\n\t\t\t\tresult = allRecords.filter( ( record ) => {\n\t\t\t\t\tconst itemId = getItemId( record );\n\t\t\t\t\tconst isSelected = selection?.includes( itemId );\n\t\t\t\t\t// Never unload selected items, even if outside visible range\n\t\t\t\t\tif ( isSelected ) {\n\t\t\t\t\t\treturn true;\n\t\t\t\t\t}\n\n\t\t\t\t\tconst itemPosition = (\n\t\t\t\t\t\trecord as Item & { position: number }\n\t\t\t\t\t ).position;\n\t\t\t\t\t// When scrolling, only trim items from the end we're scrolling away from\n\t\t\t\t\tif ( scrollDirection === 'up' ) {\n\t\t\t\t\t\t// When scrolling up, only trim items below the visible range\n\t\t\t\t\t\treturn itemPosition <= visibleMax + buffer;\n\t\t\t\t\t} else if ( scrollDirection === 'down' ) {\n\t\t\t\t\t\t// When scrolling down, only trim items above the visible range\n\t\t\t\t\t\treturn itemPosition >= visibleMin - buffer;\n\t\t\t\t\t}\n\t\t\t\t\t// When not scrolling or first load, keep items within buffer range\n\t\t\t\t\treturn (\n\t\t\t\t\t\titemPosition >= visibleMin - buffer &&\n\t\t\t\t\t\titemPosition <= visibleMax + buffer\n\t\t\t\t\t);\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t\tallLoadedRecordsRef.current = result;\n\t\treturn result;\n\t}, [\n\t\tshownData,\n\t\tview.search,\n\t\tview.filters,\n\t\tview.perPage,\n\t\tview.startPosition,\n\t\tview.infiniteScrollEnabled,\n\t\tvisibleEntries,\n\t\tselection,\n\t\tgetItemId,\n\t] );\n\n\t// When infinite scroll is disabled, preserve previous data while loading\n\tif ( ! isInfiniteScrollEnabled ) {\n\t\tconst dataToReturn =\n\t\t\tisLoading && previousDataRef.current?.length\n\t\t\t\t? previousDataRef.current\n\t\t\t\t: shownData;\n\t\treturn {\n\t\t\tdata: dataToReturn.map( ( item ) => ( {\n\t\t\t\t...item,\n\t\t\t\tposition: undefined,\n\t\t\t} ) ) as ( Item & { position?: number } )[],\n\t\t\tpaginationInfo:\n\t\t\t\tisLoading && previousDataRef.current?.length\n\t\t\t\t\t? previousPaginationInfoRef.current\n\t\t\t\t\t: paginationInfo,\n\t\t\thasInitiallyLoaded,\n\t\t\tsetVisibleEntries: undefined,\n\t\t};\n\t}\n\n\treturn {\n\t\tdata: allLoadedRecords as ( Item & { position?: number } )[],\n\t\tpaginationInfo,\n\t\thasInitiallyLoaded,\n\t\tsetVisibleEntries,\n\t};\n}\n"],
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