archy/packages/app/src/components/content/BookGrid.vue

<template>
  <div class="h-full flex flex-col">
    <div class="p-4 space-y-3" :style="isDark
      ? 'border-bottom: 1px solid rgba(255, 255, 255, 0.08)'
      : 'border-bottom: 1px solid rgba(0, 0, 0, 0.06)'"
    >
      <div class="flex items-center justify-between gap-2">
        <h3 class="text-sm font-bold" :class="isDark ? 'text-white/90' : 'text-gray-900'">
          {{ title }}
        </h3>
        <div class="flex items-center gap-2 shrink-0">
          <span class="text-xs font-mono" :class="isDark ? 'text-white/30' : 'text-gray-400'">
            {{ filteredBooks.length }} books
          </span>
          <slot name="header-actions" />
        </div>
      </div>

      <input
        v-model="search"
        type="text"
        placeholder="Search books..."
        class="w-full px-3 py-2 rounded-lg text-base outline-none transition-colors"
        :class="isDark
          ? 'bg-white/5 text-white/80 placeholder:text-white/25 focus:bg-white/10'
          : 'bg-black/3 text-gray-800 placeholder:text-gray-400 focus:bg-black/5'"
      />

      <div v-if="topGenres.length > 0" class="flex flex-wrap gap-1.5">
        <button
          v-for="genre in topGenres"
          :key="genre"
          class="text-xs px-2 py-1 rounded-md transition-all duration-150"
          :class="activeGenre === genre
            ? 'nav-tab-active'
            : isDark
              ? 'text-white/40 hover:text-white/70 hover:bg-white/5'
              : 'text-gray-500 hover:text-gray-800 hover:bg-black/5'"
          @click="activeGenre = activeGenre === genre ? null : genre"
        >
          {{ genre }}
        </button>
      </div>
    </div>

    <div class="flex-1 overflow-y-auto custom-scrollbar px-4 pt-4 pb-16">
      <div class="grid grid-cols-2 sm:grid-cols-3 gap-4">
        <button
          v-for="book in filteredBooks"
          :key="book.id"
          class="group flex flex-col items-stretch text-left w-full path-glass-bubble rounded-2xl overflow-hidden transition-all duration-200 hover:brightness-105"
          :aria-label="`${book.title} by ${book.author}`"
          @click="$emit('selectBook', book)"
        >
          <div class="cover-card flex-1 min-h-0 relative">
            <div class="aspect-[2/3] relative w-full overflow-hidden rounded-[10px]">
              <img
                v-if="coverSrc(book)"
                :src="coverSrc(book)!"
                :alt="`${book.title} by ${book.author}`"
                class="w-full h-full object-cover transition-transform duration-300 group-hover:scale-110"
                loading="lazy"
                @error="onCoverError(book)"
              />
              <div
                v-else
                class="w-full h-full bg-cover bg-center"
                :style="{ backgroundImage: `url(${fallbackFor(book)})` }"
              />
              <div v-if="coverSrc(book)" class="absolute inset-0 bg-gradient-to-t from-black/60 via-transparent to-transparent pointer-events-none" />

              <div class="absolute bottom-0 left-0 right-0 p-2">
                <p class="text-xs font-semibold text-white/90 leading-tight truncate">
                  {{ book.title }}
                </p>
                <p class="text-xs text-white/40 truncate mt-0.5">{{ book.author }}</p>
              </div>

              <div v-if="book.rating" class="absolute top-1.5 left-1.5">
                <span class="text-xs px-1.5 py-0.5 rounded bg-black/60 text-amber-400 backdrop-blur-sm font-medium">
                  ★ {{ book.rating.toFixed(1) }}
                </span>
              </div>

              <div v-if="book.year" class="absolute top-1.5 right-1.5">
                <span class="text-xs px-1 py-0.5 rounded bg-black/60 text-white/70 backdrop-blur-sm">
                  {{ book.year }}
                </span>
              </div>
            </div>
          </div>
        </button>
      </div>

      <div v-if="filteredBooks.length === 0" class="flex items-center justify-center py-12">
        <p class="text-sm" :class="isDark ? 'text-white/30' : 'text-gray-400'">
          No books match your search
        </p>
      </div>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, computed, reactive, onMounted, watch } from 'vue'
import type { Book } from '@aiui/core/types/content'
import { useTheme } from '@/composables/useTheme'
import { generateBookCoverFallback, fetchBookCover } from '@/composables/useImageFallback'

const props = withDefaults(defineProps<{
  books: Book[]
  title?: string
}>(), {
  title: 'Recommended Books',
})

defineEmits<{ selectBook: [book: Book] }>()

const { isDark } = useTheme()
const search = ref('')
const activeGenre = ref<string | null>(null)
const failedCovers = ref<Set<string>>(new Set())
const fetchedCovers = reactive<Map<string, string>>(new Map())

function coverSrc(book: Book): string | null {
  if (failedCovers.value.has(book.id)) return null
  return book.coverUrl || fetchedCovers.get(book.id) || null
}

function fallbackFor(book: Book): string {
  return generateBookCoverFallback(book.title, book.author)
}

function onCoverError(book: Book) {
  failedCovers.value.add(book.id)
  failedCovers.value = new Set(failedCovers.value)
}

function fetchCoversFor(books: Book[]) {
  for (const book of books) {
    if (book.coverUrl || fetchedCovers.has(book.id)) continue
    fetchBookCover(book.title, book.author).then((url) => {
      if (url) fetchedCovers.set(book.id, url)
    }).catch(() => {})
  }
}

onMounted(() => fetchCoversFor(props.books))
watch(() => props.books, (books) => fetchCoversFor(books), { immediate: false })

const topGenres = computed(() => {
  const counts = new Map<string, number>()
  for (const b of props.books) {
    for (const g of b.genres ?? []) {
      counts.set(g, (counts.get(g) ?? 0) + 1)
    }
  }
  return [...counts.entries()]
    .sort((a, b) => b[1] - a[1])
    .slice(0, 8)
    .map(([g]) => g)
})

const filteredBooks = computed(() => {
  let result = props.books
  if (search.value) {
    const q = search.value.toLowerCase()
    result = result.filter(
      (b) =>
        b.title.toLowerCase().includes(q) ||
        b.author.toLowerCase().includes(q) ||
        (b.genres ?? []).some((g) => g.toLowerCase().includes(q))
    )
  }
  if (activeGenre.value) {
    result = result.filter((b) => (b.genres ?? []).includes(activeGenre.value!))
  }
  return result
})
</script>