audiobookshelf/client/components/cards/BookCover.vue

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<template>
<div class="relative rounded-sm overflow-hidden" :style="{ height: width * 1.6 + 'px', width: width + 'px', maxWidth: width + 'px', minWidth: width + 'px' }">
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<div class="w-full h-full bg-bg relative">
<div v-if="showCoverBg" class="absolute top-0 left-0 w-full h-full z-0" ref="coverBg" />
<img ref="cover" :src="cover" @error="imageError" @load="imageLoaded" class="w-full h-full absolute top-0 left-0" :class="showCoverBg ? 'object-contain' : 'object-cover'" />
</div>
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<div v-if="imageFailed" class="absolute top-0 left-0 right-0 bottom-0 w-full h-full bg-red-100" :style="{ padding: placeholderCoverPadding + 'rem' }">
<div class="w-full h-full border-2 border-error flex flex-col items-center justify-center">
<img src="/LogoTransparent.png" class="mb-2" :style="{ height: 64 * sizeMultiplier + 'px' }" />
<p class="text-center font-book text-error" :style="{ fontSize: titleFontSize + 'rem' }">Invalid Cover</p>
</div>
</div>
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<div v-if="!hasCover" class="absolute top-0 left-0 right-0 bottom-0 w-full h-full flex items-center justify-center" :style="{ padding: placeholderCoverPadding + 'rem' }">
<div>
<p class="text-center font-book" style="color: rgb(247 223 187)" :style="{ fontSize: titleFontSize + 'rem' }">{{ titleCleaned }}</p>
</div>
</div>
<div v-if="!hasCover" class="absolute left-0 right-0 w-full flex items-center justify-center" :style="{ padding: placeholderCoverPadding + 'rem', bottom: authorBottom + 'rem' }">
<p class="text-center font-book" style="color: rgb(247 223 187); opacity: 0.75" :style="{ fontSize: authorFontSize + 'rem' }">{{ authorCleaned }}</p>
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</div>
</div>
</template>
<script>
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import Path from 'path'
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export default {
props: {
audiobook: {
type: Object,
default: () => {}
},
authorOverride: String,
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width: {
type: Number,
default: 120
}
},
data() {
return {
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imageFailed: false,
showCoverBg: false
}
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},
watch: {
cover() {
this.imageFailed = false
}
},
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computed: {
book() {
return this.audiobook.book || {}
},
title() {
return this.book.title || 'No Title'
},
titleCleaned() {
if (this.title.length > 60) {
return this.title.slice(0, 57) + '...'
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}
return this.title
},
author() {
if (this.authorOverride) return this.authorOverride
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return this.book.author || 'Unknown'
},
authorCleaned() {
if (this.author.length > 30) {
return this.author.slice(0, 27) + '...'
}
return this.author
},
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placeholderUrl() {
return '/book_placeholder.jpg'
},
fullCoverUrl() {
if (!this.cover || this.cover === this.placeholderUrl) return ''
if (this.cover.startsWith('http:') || this.cover.startsWith('https:')) return this.cover
try {
var url = new URL(this.cover, document.baseURI)
return url.href
} catch (err) {
console.error(err)
return ''
}
return `${process.env.serverUrl}/${Path.normalize(this.cover)}`
},
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cover() {
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return this.book.cover || this.placeholderUrl
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},
hasCover() {
return !!this.book.cover
},
sizeMultiplier() {
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return this.width / 120
},
titleFontSize() {
return 0.75 * this.sizeMultiplier
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},
authorFontSize() {
return 0.6 * this.sizeMultiplier
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},
placeholderCoverPadding() {
return 0.8 * this.sizeMultiplier
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},
authorBottom() {
return 0.75 * this.sizeMultiplier
}
},
methods: {
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setCoverBg() {
if (this.$refs.coverBg) {
this.$refs.coverBg.style.backgroundImage = `url("${this.fullCoverUrl}")`
this.$refs.coverBg.style.backgroundSize = 'cover'
this.$refs.coverBg.style.backgroundPosition = 'center'
this.$refs.coverBg.style.opacity = 0.25
this.$refs.coverBg.style.filter = 'blur(1px)'
}
},
hideCoverBg() {},
imageLoaded() {
if (this.$refs.cover && this.cover !== this.placeholderUrl) {
var { naturalWidth, naturalHeight } = this.$refs.cover
var aspectRatio = naturalHeight / naturalWidth
var arDiff = Math.abs(aspectRatio - 1.6)
// If image aspect ratio is <= 1.45 or >= 1.75 then use cover bg, otherwise stretch to fit
if (arDiff > 0.15) {
this.showCoverBg = true
this.$nextTick(this.setCoverBg)
} else {
this.showCoverBg = false
}
}
},
imageError(err) {
console.error('ImgError', err)
this.imageFailed = true
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}
},
mounted() {}
}
</script>