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|
"use client"
import { useRef, useEffect } from "react"
import { useVirtualizer } from "@tanstack/react-virtual"
import { useTimeline } from "@/lib/queries/use-timeline"
import { useSavedEntries } from "@/lib/queries/use-saved-entries"
import { useCustomFeedTimeline } from "@/lib/queries/use-custom-feed-timeline"
import { useUserInterfaceStore } from "@/lib/stores/user-interface-store"
import { EntryListItem } from "./entry-list-item"
interface EntryListProperties {
feedFilter: "all" | "saved"
folderIdentifier?: string | null
feedIdentifier?: string | null
customFeedIdentifier?: string | null
}
function useEntryData(
feedFilter: "all" | "saved",
folderIdentifier?: string | null,
feedIdentifier?: string | null,
customFeedIdentifier?: string | null
) {
const timelineQuery = useTimeline(
feedFilter === "all" && !customFeedIdentifier ? folderIdentifier : undefined,
feedFilter === "all" && !customFeedIdentifier ? feedIdentifier : undefined,
false
)
const savedQuery = useSavedEntries()
const customFeedQuery = useCustomFeedTimeline(
feedFilter === "all" ? (customFeedIdentifier ?? null) : null
)
if (feedFilter === "saved") {
return savedQuery
}
if (customFeedIdentifier) {
return customFeedQuery
}
return timelineQuery
}
export function EntryList({
feedFilter,
folderIdentifier,
feedIdentifier,
customFeedIdentifier,
}: EntryListProperties) {
const { data, fetchNextPage, hasNextPage, isFetchingNextPage, isLoading } =
useEntryData(feedFilter, folderIdentifier, feedIdentifier, customFeedIdentifier)
const entryListViewMode = useUserInterfaceStore(
(state) => state.entryListViewMode
)
const selectedEntryIdentifier = useUserInterfaceStore(
(state) => state.selectedEntryIdentifier
)
const setSelectedEntryIdentifier = useUserInterfaceStore(
(state) => state.setSelectedEntryIdentifier
)
const focusedEntryIdentifier = useUserInterfaceStore(
(state) => state.focusedEntryIdentifier
)
const setFocusedEntryIdentifier = useUserInterfaceStore(
(state) => state.setFocusedEntryIdentifier
)
const setNavigableEntryIdentifiers = useUserInterfaceStore(
(state) => state.setNavigableEntryIdentifiers
)
const allEntries = data?.pages.flatMap((page) => page) ?? []
const scrollContainerReference = useRef<HTMLDivElement>(null)
const firstEntryIdentifier = allEntries[0]?.entryIdentifier
const lastEntryIdentifier = allEntries[allEntries.length - 1]?.entryIdentifier
useEffect(() => {
setNavigableEntryIdentifiers(
allEntries.map((entry) => entry.entryIdentifier)
)
}, [firstEntryIdentifier, lastEntryIdentifier, allEntries.length, setNavigableEntryIdentifiers])
function getEstimatedItemSize() {
switch (entryListViewMode) {
case "compact":
return 40
case "comfortable":
return 60
case "expanded":
return 108
}
}
const virtualizer = useVirtualizer({
count: hasNextPage ? allEntries.length + 1 : allEntries.length,
getScrollElement: () => scrollContainerReference.current,
estimateSize: getEstimatedItemSize,
overscan: 10,
})
const virtualItems = virtualizer.getVirtualItems()
useEffect(() => {
const lastItem = virtualItems[virtualItems.length - 1]
if (!lastItem) return
if (
lastItem.index >= allEntries.length - 1 &&
hasNextPage &&
!isFetchingNextPage
) {
fetchNextPage()
}
}, [
virtualItems,
allEntries.length,
hasNextPage,
isFetchingNextPage,
fetchNextPage,
])
const allEntriesReference = useRef(allEntries)
allEntriesReference.current = allEntries
useEffect(() => {
if (!focusedEntryIdentifier) return
const focusedIndex = allEntriesReference.current.findIndex(
(entry) => entry.entryIdentifier === focusedEntryIdentifier
)
if (focusedIndex !== -1) {
virtualizer.scrollToIndex(focusedIndex, { align: "auto" })
}
}, [focusedEntryIdentifier])
if (isLoading) {
return (
<div className="space-y-2 p-4">
{Array.from({ length: 8 }).map((_, skeletonIndex) => (
<div
key={skeletonIndex}
className="h-10 animate-[skeleton-shimmer_1.5s_ease-in-out_infinite] bg-background-tertiary"
/>
))}
</div>
)
}
if (allEntries.length === 0) {
return (
<div className="flex h-full items-center justify-center">
<p className="text-text-tertiary">
{feedFilter === "saved"
? "no saved entries yet"
: "no entries yet \u2014 add a feed to get started"}
</p>
</div>
)
}
return (
<div ref={scrollContainerReference} data-entry-list-scroll className="h-full overflow-auto">
<div
style={{
height: `${virtualizer.getTotalSize()}px`,
width: "100%",
position: "relative",
}}
>
{virtualItems.map((virtualItem) => {
const entry = allEntries[virtualItem.index]
if (!entry) {
return (
<div
key="loader"
data-index={virtualItem.index}
ref={virtualizer.measureElement}
className="absolute left-0 top-0 w-full"
style={{
transform: `translateY(${virtualItem.start}px)`,
}}
>
<p className="p-4 text-center text-text-dim">loading ...</p>
</div>
)
}
return (
<EntryListItem
key={entry.entryIdentifier}
entry={entry}
isSelected={
entry.entryIdentifier === selectedEntryIdentifier
}
isFocused={
entry.entryIdentifier === focusedEntryIdentifier
}
viewMode={entryListViewMode}
onSelect={() => {
setFocusedEntryIdentifier(entry.entryIdentifier)
setSelectedEntryIdentifier(entry.entryIdentifier)
}}
measureReference={virtualizer.measureElement}
virtualItem={virtualItem}
/>
)
})}
</div>
</div>
)
}
|