From e51a01123ec8c7d2fa870705281f477ec811e59e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20F=C3=B6rtsch?= <mail@felixfoertsch.de>
Date: Sun, 1 Mar 2026 14:32:18 +0100
Subject: [PATCH] add library feature: search, sort, deduplication, progressive
 rendering

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 .../library/components/library-header.tsx     | 25 +++++
 .../library/components/library-list.tsx       | 42 ++++++++
 .../library/components/library-search.tsx     | 48 +++++++++
 src/features/library/hooks/use-library.ts     | 98 +++++++++++++++++++
 src/routes/library/index.tsx                  | 23 ++++-
 5 files changed, 235 insertions(+), 1 deletion(-)
 create mode 100644 src/features/library/components/library-header.tsx
 create mode 100644 src/features/library/components/library-list.tsx
 create mode 100644 src/features/library/components/library-search.tsx
 create mode 100644 src/features/library/hooks/use-library.ts

diff --git a/src/features/library/components/library-header.tsx b/src/features/library/components/library-header.tsx
new file mode 100644
index 0000000..8bfa6f5
--- /dev/null
+++ b/src/features/library/components/library-header.tsx
@@ -0,0 +1,25 @@
+import { formatPlaytime } from "@/features/games/schema"
+import { t } from "@/shared/i18n"
+
+interface LibraryHeaderProps {
+	totalCount: number
+	totalPlaytime: number
+}
+
+export function LibraryHeader({ totalCount, totalPlaytime }: LibraryHeaderProps) {
+	return (
+		<div className="mb-4">
+			<h1 className="text-2xl font-bold">{t("library.title")}</h1>
+			<div className="mt-1 flex gap-4 text-sm text-muted-foreground">
+				<span>
+					{totalCount} {t("library.games")}
+				</span>
+				{totalPlaytime > 0 && (
+					<span>
+						{formatPlaytime(totalPlaytime)} {t("library.hours")}
+					</span>
+				)}
+			</div>
+		</div>
+	)
+}
diff --git a/src/features/library/components/library-list.tsx b/src/features/library/components/library-list.tsx
new file mode 100644
index 0000000..9dd7e43
--- /dev/null
+++ b/src/features/library/components/library-list.tsx
@@ -0,0 +1,42 @@
+import { GameCard } from "@/features/games/components/game-card"
+import type { Game } from "@/shared/db/schema"
+import { t } from "@/shared/i18n"
+import { useEffect, useRef } from "react"
+
+interface LibraryListProps {
+	games: Game[]
+	hasMore: boolean
+	loadMore: () => void
+	onUpdate: () => void
+}
+
+export function LibraryList({ games, hasMore, loadMore, onUpdate }: LibraryListProps) {
+	const sentinelRef = useRef<HTMLDivElement>(null)
+
+	useEffect(() => {
+		if (!hasMore || !sentinelRef.current) return
+
+		const observer = new IntersectionObserver(
+			(entries) => {
+				if (entries[0].isIntersecting) loadMore()
+			},
+			{ threshold: 0.1 },
+		)
+
+		observer.observe(sentinelRef.current)
+		return () => observer.disconnect()
+	}, [hasMore, loadMore])
+
+	if (games.length === 0) {
+		return <p className="py-8 text-center text-muted-foreground">{t("library.empty")}</p>
+	}
+
+	return (
+		<div className="space-y-3">
+			{games.map((game) => (
+				<GameCard key={game.id} game={game} onUpdate={onUpdate} />
+			))}
+			{hasMore && <div ref={sentinelRef} className="h-8" />}
+		</div>
+	)
+}
diff --git a/src/features/library/components/library-search.tsx b/src/features/library/components/library-search.tsx
new file mode 100644
index 0000000..1810b0a
--- /dev/null
+++ b/src/features/library/components/library-search.tsx
@@ -0,0 +1,48 @@
+import { Button } from "@/shared/components/ui/button"
+import { Input } from "@/shared/components/ui/input"
+import {
+	Select,
+	SelectContent,
+	SelectItem,
+	SelectTrigger,
+	SelectValue,
+} from "@/shared/components/ui/select"
+import { t } from "@/shared/i18n"
+import { useUiStore } from "@/shared/stores/ui-store"
+import { ArrowDownAZ, ArrowUpAZ } from "lucide-react"
+
+export function LibrarySearch() {
+	const { searchText, setSearchText, sortBy, setSortBy, sortDirection, toggleSortDirection } =
+		useUiStore()
+
+	return (
+		<div className="mb-4 flex gap-2">
+			<Input
+				value={searchText}
+				onChange={(e) => setSearchText(e.target.value)}
+				placeholder={t("library.search")}
+				className="flex-1"
+			/>
+			<Select
+				value={sortBy}
+				onValueChange={(v) => setSortBy(v as "title" | "playtime" | "lastPlayed")}
+			>
+				<SelectTrigger className="w-32">
+					<SelectValue />
+				</SelectTrigger>
+				<SelectContent>
+					<SelectItem value="title">{t("library.sort.title")}</SelectItem>
+					<SelectItem value="playtime">{t("library.sort.playtime")}</SelectItem>
+					<SelectItem value="lastPlayed">{t("library.sort.lastPlayed")}</SelectItem>
+				</SelectContent>
+			</Select>
+			<Button variant="ghost" size="icon" onClick={toggleSortDirection}>
+				{sortDirection === "asc" ? (
+					<ArrowDownAZ className="h-4 w-4" />
+				) : (
+					<ArrowUpAZ className="h-4 w-4" />
+				)}
+			</Button>
+		</div>
+	)
+}
diff --git a/src/features/library/hooks/use-library.ts b/src/features/library/hooks/use-library.ts
new file mode 100644
index 0000000..b91b3ea
--- /dev/null
+++ b/src/features/library/hooks/use-library.ts
@@ -0,0 +1,98 @@
+import { useGames } from "@/shared/db/hooks"
+import type { Game } from "@/shared/db/schema"
+import { useUiStore } from "@/shared/stores/ui-store"
+import { useCallback, useEffect, useMemo, useState } from "react"
+
+function normalizeTitle(title: string): string {
+	return title.toLowerCase().replace(/[^a-z0-9]/g, "")
+}
+
+function mergeGames(games: Game[]): Game[] {
+	const merged = new Map<string, Game>()
+
+	for (const game of games) {
+		const key = game.canonical_id ?? `title:${normalizeTitle(game.title)}`
+		const existing = merged.get(key)
+
+		if (existing) {
+			merged.set(key, {
+				...existing,
+				playtime_hours: existing.playtime_hours + game.playtime_hours,
+				last_played:
+					existing.last_played && game.last_played
+						? existing.last_played > game.last_played
+							? existing.last_played
+							: game.last_played
+						: existing.last_played || game.last_played,
+				rating: existing.rating >= 0 ? existing.rating : game.rating,
+				game_state: existing.game_state !== "not_set" ? existing.game_state : game.game_state,
+				is_favorite: existing.is_favorite || game.is_favorite,
+			})
+		} else {
+			merged.set(key, { ...game })
+		}
+	}
+
+	return Array.from(merged.values())
+}
+
+const INITIAL_BATCH = 20
+const BATCH_SIZE = 50
+
+export function useLibrary() {
+	const { games: allGames, loading, reload } = useGames()
+	const { searchText, sortBy, sortDirection } = useUiStore()
+	const [visibleCount, setVisibleCount] = useState(INITIAL_BATCH)
+
+	const merged = useMemo(() => mergeGames(allGames), [allGames])
+
+	const filtered = useMemo(() => {
+		let result = merged
+		if (searchText) {
+			const q = searchText.toLowerCase()
+			result = result.filter((g) => g.title.toLowerCase().includes(q))
+		}
+		result.sort((a, b) => {
+			const dir = sortDirection === "asc" ? 1 : -1
+			switch (sortBy) {
+				case "playtime":
+					return (b.playtime_hours - a.playtime_hours) * dir
+				case "lastPlayed": {
+					const aDate = a.last_played ?? ""
+					const bDate = b.last_played ?? ""
+					return bDate.localeCompare(aDate) * dir
+				}
+				default:
+					return a.title.localeCompare(b.title) * dir
+			}
+		})
+		return result
+	}, [merged, searchText, sortBy, sortDirection])
+
+	const visible = useMemo(() => filtered.slice(0, visibleCount), [filtered, visibleCount])
+
+	const loadMore = useCallback(() => {
+		setVisibleCount((c) => Math.min(c + BATCH_SIZE, filtered.length))
+	}, [filtered.length])
+
+	// biome-ignore lint/correctness/useExhaustiveDependencies: intentional reset when filters change
+	useEffect(() => {
+		setVisibleCount(INITIAL_BATCH)
+	}, [searchText, sortBy, sortDirection])
+
+	const totalPlaytime = useMemo(
+		() => merged.reduce((sum, g) => sum + g.playtime_hours, 0),
+		[merged],
+	)
+
+	return {
+		games: visible,
+		totalCount: merged.length,
+		filteredCount: filtered.length,
+		totalPlaytime,
+		hasMore: visibleCount < filtered.length,
+		loadMore,
+		loading,
+		reload,
+	}
+}
diff --git a/src/routes/library/index.tsx b/src/routes/library/index.tsx
index 680f2a5..0e590b8 100644
--- a/src/routes/library/index.tsx
+++ b/src/routes/library/index.tsx
@@ -1,5 +1,26 @@
+import { LibraryHeader } from "@/features/library/components/library-header"
+import { LibraryList } from "@/features/library/components/library-list"
+import { LibrarySearch } from "@/features/library/components/library-search"
+import { useLibrary } from "@/features/library/hooks/use-library"
+import { t } from "@/shared/i18n"
 import { createFileRoute } from "@tanstack/react-router"
 
 export const Route = createFileRoute("/library/")({
-	component: () => <div>Library</div>,
+	component: LibraryPage,
 })
+
+function LibraryPage() {
+	const { games, totalCount, totalPlaytime, hasMore, loadMore, loading, reload } = useLibrary()
+
+	if (loading) {
+		return <div className="p-4 text-center text-muted-foreground">{t("general.loading")}</div>
+	}
+
+	return (
+		<div className="mx-auto max-w-lg p-4">
+			<LibraryHeader totalCount={totalCount} totalPlaytime={totalPlaytime} />
+			<LibrarySearch />
+			<LibraryList games={games} hasMore={hasMore} loadMore={loadMore} onUpdate={reload} />
+		</div>
+	)
+}