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<div class="image-carousel">
<div v-if="loading" class="carousel-container loading-state">
<div class="loading-spinner">
<font-awesome-icon icon="fa-solid fa-spinner" spin />
<span class="ms-2">Loading images...</span>
</div>
</div>
<div v-else-if="!currentImageUrl" class="carousel-container error-state">
<div class="error-message">
<font-awesome-icon icon="fa-solid fa-exclamation-circle" />
<span class="ms-2">Image not available</span>
</div>
</div>
<div
v-else
class="carousel-container"
@touchstart.passive="onTouchStart"
@touchend.passive="onTouchEnd"
>
<img
:src="currentImageUrl"
:alt="`Image ${currentIndex + 1}`"
class="carousel-image"
@error="handleImageError"
/>
<!-- Navigation arrows -->
<button
v-if="images.length > 1"
:disabled="currentIndex === 0"
class="carousel-arrow carousel-arrow-left"
@click.stop="previousImage"
>
<font-awesome-icon icon="fa-solid fa-chevron-left" />
</button>
<button
v-if="images.length > 1"
:disabled="currentIndex === images.length - 1"
class="carousel-arrow carousel-arrow-right"
@click.stop="nextImage"
>
<font-awesome-icon icon="fa-solid fa-chevron-right" />
</button>
<!-- Counter -->
<div v-if="images.length > 1" class="carousel-counter" @click.stop>
{{ currentIndex + 1 }} / {{ images.length }}
</div>
<!-- Dots indicator -->
<div v-if="images.length > 1 && images.length <= 10" class="carousel-dots">
<button
v-for="(_, idx) in images"
:key="idx"
class="carousel-dot"
:class="{ active: idx === currentIndex }"
@click.stop="goToImage(idx)"
/>
</div>
</div>
</div>
</template>
<script setup lang="ts">
import { ref, computed, watch, onMounted } from 'vue'
import api from '@/services/api'
const props = defineProps<{
images: string[]
itemId: string
}>()
const currentIndex = ref(0)
const imageUrls = ref<string[]>([])
const loading = ref(true)
const retriedKeys = ref<Set<string>>(new Set())
// Cache presigned URLs with TTL (Lambda URLs expire in 1 hour — refresh at 55 min)
const PRESIGNED_URL_TTL_MS = 55 * 60 * 1000
const urlCache = new Map<string, { url: string; expiresAt: number }>()
// Get presigned read URL from API, with TTL cache
const getPresignedReadUrl = async (key: string): Promise<string> => {
const cached = urlCache.get(key)
if (cached && Date.now() < cached.expiresAt) {
return cached.url
}
try {
const response = await api.post('/v1/upload/presigned-read-url', { key })
const url: string = response.data.readUrl
urlCache.set(key, { url, expiresAt: Date.now() + PRESIGNED_URL_TTL_MS })
return url
} catch (error) {
console.error('Error getting presigned read URL for key:', key, error)
return ''
}
}
// Load all presigned URLs
const loadImageUrls = async () => {
loading.value = true
retriedKeys.value.clear()
try {
imageUrls.value = await Promise.all(props.images.map((key) => getPresignedReadUrl(key)))
} catch (error) {
console.error('Error loading image URLs:', error)
} finally {
loading.value = false
}
}
const currentImageUrl = computed(() => {
return imageUrls.value[currentIndex.value] || ''
})
function nextImage() {
Eif (currentIndex.value < props.images.length - 1) {
currentIndex.value++
}
}
function previousImage() {
Eif (currentIndex.value > 0) {
currentIndex.value--
}
}
function goToImage(index: number) {
currentIndex.value = index
}
async function handleImageError() {
const key = props.images[currentIndex.value]
Iif (!key || retriedKeys.value.has(key)) return // already retried, accept error state
retriedKeys.value.add(key)
urlCache.delete(key)
const newUrl = await getPresignedReadUrl(key)
Eif (newUrl) {
const updated = [...imageUrls.value]
updated[currentIndex.value] = newUrl
imageUrls.value = updated
}
}
// Touch swipe support
const touchStartX = ref<number | null>(null)
function onTouchStart(event: TouchEvent) {
if (event.changedTouches.length > 0) {
touchStartX.value = event.changedTouches[0]!.clientX
}
}
function onTouchEnd(event: TouchEvent) {
if (touchStartX.value === null || event.changedTouches.length === 0) return
const delta = event.changedTouches[0]!.clientX - touchStartX.value
touchStartX.value = null
if (delta < -50) nextImage()
else if (delta > 50) previousImage()
}
// Load URLs on mount
onMounted(() => {
loadImageUrls()
})
// Reset index and reload URLs when images change
watch(
() => props.images,
() => {
currentIndex.value = 0
loadImageUrls()
}
)
</script>
<style scoped>
.image-carousel {
width: 100%;
max-width: 100%;
}
.carousel-container {
position: relative;
width: 100%;
padding-bottom: 75%; /* 4:3 aspect ratio */
background-color: var(--bw-surface-muted);
border-radius: 0.25rem;
overflow: hidden;
}
.carousel-container.loading-state,
.carousel-container.error-state {
display: flex;
align-items: center;
justify-content: center;
}
.loading-spinner,
.error-message {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
display: flex;
align-items: center;
color: #6c757d;
font-size: 0.875rem;
}
.carousel-image {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
object-fit: contain;
transition: opacity 0.3s ease;
}
.carousel-arrow {
position: absolute;
top: 50%;
transform: translateY(-50%);
background-color: rgba(0, 0, 0, 0.6);
color: white;
border: none;
border-radius: 50%;
width: 36px;
height: 36px;
display: flex;
align-items: center;
justify-content: center;
cursor: pointer;
z-index: 10;
transition: all 0.2s;
padding: 0;
}
.carousel-arrow:hover:not(:disabled) {
background-color: rgba(0, 0, 0, 0.8);
transform: translateY(-50%) scale(1.1);
}
.carousel-arrow:disabled {
opacity: 0.3;
cursor: not-allowed;
}
.carousel-arrow-left {
left: 8px;
}
.carousel-arrow-right {
right: 8px;
}
.carousel-counter {
position: absolute;
top: 8px;
right: 8px;
background-color: rgba(0, 0, 0, 0.7);
color: white;
padding: 4px 12px;
border-radius: 12px;
font-size: 0.75rem;
font-weight: 500;
z-index: 10;
}
.carousel-dots {
position: absolute;
bottom: 12px;
left: 50%;
transform: translateX(-50%);
display: flex;
gap: 8px;
z-index: 10;
}
.carousel-dot {
width: 8px;
height: 8px;
border-radius: 50%;
border: 2px solid rgba(255, 255, 255, 0.8);
background-color: transparent;
cursor: pointer;
padding: 0;
transition: all 0.2s;
}
.carousel-dot:hover {
background-color: rgba(255, 255, 255, 0.6);
transform: scale(1.2);
}
.carousel-dot.active {
background-color: rgba(255, 255, 255, 0.9);
border-color: white;
}
/* Mobile adjustments */
@media (max-width: 767px) {
.carousel-arrow {
width: 32px;
height: 32px;
}
.carousel-arrow-left {
left: 4px;
}
.carousel-arrow-right {
right: 4px;
}
.carousel-counter {
font-size: 0.7rem;
padding: 3px 10px;
}
}
</style>
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