Paul Frazee
62 lines
1.4 KiB
TypeScript
62 lines
1.4 KiB
TypeScript
import RNFetchBlob from 'rn-fetch-blob'
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import ImageResizer from '@bam.tech/react-native-image-resizer'
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interface DownloadAndResizeOpts {
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uri: string
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width: number
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height: number
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mode: 'contain' | 'cover' | 'stretch'
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timeout: number
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}
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export async function downloadAndResize(opts: DownloadAndResizeOpts) {
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let appendExt
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try {
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const urip = new URL(opts.uri)
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const ext = urip.pathname.split('.').pop()
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if (ext === 'jpg' || ext === 'jpeg') {
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appendExt = 'jpeg'
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} else if (ext === 'png') {
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appendExt = 'png'
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} else {
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return
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}
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} catch (e: any) {
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console.error('Invalid URI', opts.uri, e)
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return
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}
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let downloadRes
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try {
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const downloadResPromise = RNFetchBlob.config({
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fileCache: true,
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appendExt,
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}).fetch('GET', opts.uri)
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const to1 = setTimeout(() => downloadResPromise.cancel(), opts.timeout)
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downloadRes = await downloadResPromise
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clearTimeout(to1)
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let localUri = downloadRes.path()
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if (!localUri.startsWith('file://')) {
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localUri = `file://${localUri}`
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}
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const resizeRes = await ImageResizer.createResizedImage(
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localUri,
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opts.width,
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opts.height,
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'JPEG',
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0.7,
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undefined,
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undefined,
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undefined,
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{mode: opts.mode},
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)
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return resizeRes
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} finally {
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if (downloadRes) {
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downloadRes.flush()
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}
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}
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}
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