55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
import {ref, watch, type Ref} from 'vue'
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import ListService from '@/services/list'
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import type {IList} from '@/modelTypes/IList'
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import {getBlobFromBlurHash} from '@/helpers/getBlobFromBlurHash'
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export function useListBackground(list: Ref<IList>) {
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const background = ref<string | null>(null)
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const backgroundLoading = ref(false)
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const blurHashUrl = ref('')
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watch(
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() => [list.value.id, list.value.backgroundBlurHash] as [IList['id'], IList['backgroundBlurHash']],
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async ([listId, blurHash], oldValue) => {
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if (
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list.value === null ||
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!list.value.backgroundInformation ||
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backgroundLoading.value
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) {
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return
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}
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const [oldListId, oldBlurHash] = oldValue || []
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if (
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oldValue !== undefined &&
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listId === oldListId && blurHash === oldBlurHash
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) {
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// list hasn't changed
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return
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}
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backgroundLoading.value = true
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try {
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const blurHashPromise = getBlobFromBlurHash(blurHash).then((blurHash) => {
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blurHashUrl.value = blurHash ? window.URL.createObjectURL(blurHash) : ''
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})
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const listService = new ListService()
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const backgroundPromise = listService.background(list.value).then((result) => {
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background.value = result
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})
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await Promise.all([blurHashPromise, backgroundPromise])
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} finally {
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backgroundLoading.value = false
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}
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},
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{ immediate: true },
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)
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return {
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background,
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blurHashUrl,
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backgroundLoading,
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}
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} |