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import RNFetchBlob from 'rn-fetch-blob'
import ImageResizer from '@bam.tech/react-native-image-resizer'
import {Image as RNImage, Share as RNShare} from 'react-native'
import {Image} from 'react-native-image-crop-picker'
import * as RNFS from 'react-native-fs'
import uuid from 'react-native-uuid'
import * as Sharing from 'expo-sharing'
import * as MediaLibrary from 'expo-media-library'
import {Dimensions} from './types'
import {isAndroid, isIOS} from 'platform/detection'
export async function compressIfNeeded(
img: Image,
maxSize: number = 1000000,
): Promise<Image> {
const origUri = `file://${img.path}`
if (img.size < maxSize) {
return img
}
const resizedImage = await doResize(origUri, {
width: img.width,
height: img.height,
mode: 'stretch',
maxSize,
})
const finalImageMovedPath = await moveToPermanentPath(resizedImage.path)
const finalImg = {
...resizedImage,
path: finalImageMovedPath,
}
return finalImg
}
export interface DownloadAndResizeOpts {
uri: string
width: number
height: number
mode: 'contain' | 'cover' | 'stretch'
maxSize: number
timeout: number
}
export async function downloadAndResize(opts: DownloadAndResizeOpts) {
let appendExt = 'jpeg'
try {
const urip = new URL(opts.uri)
const ext = urip.pathname.split('.').pop()
if (ext === 'png') {
appendExt = 'png'
}
} catch (e: any) {
console.error('Invalid URI', opts.uri, e)
return
}
let downloadRes
try {
const downloadResPromise = RNFetchBlob.config({
fileCache: true,
appendExt,
}).fetch('GET', opts.uri)
const to1 = setTimeout(() => downloadResPromise.cancel(), opts.timeout)
downloadRes = await downloadResPromise
clearTimeout(to1)
let localUri = downloadRes.path()
if (!localUri.startsWith('file://')) {
localUri = `file://${localUri}`
}
return await doResize(localUri, opts)
} finally {
if (downloadRes) {
downloadRes.flush()
}
}
}
export async function shareImageModal({uri}: {uri: string}) {
if (!(await Sharing.isAvailableAsync())) {
// TODO might need to give an error to the user in this case -prf
return
}
const downloadResponse = await RNFetchBlob.config({
fileCache: true,
}).fetch('GET', uri)
// NOTE
// assuming PNG
// we're currently relying on the fact our CDN only serves pngs
// -prf
let imagePath = downloadResponse.path()
imagePath = normalizePath(await moveToPermanentPath(imagePath, '.png'), true)
// NOTE
// for some reason expo-sharing refuses to work on iOS
// ...and visa versa
// -prf
if (isIOS) {
await RNShare.share({url: imagePath})
} else {
await Sharing.shareAsync(imagePath, {
mimeType: 'image/png',
UTI: 'image/png',
})
}
RNFS.unlink(imagePath)
}
export async function saveImageToAlbum({
uri,
album,
}: {
uri: string
album: string
}) {
// download the file to cache
// NOTE
// assuming PNG
// we're currently relying on the fact our CDN only serves pngs
// -prf
const downloadResponse = await RNFetchBlob.config({
fileCache: true,
}).fetch('GET', uri)
let imagePath = downloadResponse.path()
imagePath = normalizePath(await moveToPermanentPath(imagePath, '.png'), true)
// save to the album (creating as needed)
const assetRef = await MediaLibrary.createAssetAsync(imagePath)
const albumRef = await MediaLibrary.getAlbumAsync(album)
if (albumRef) {
await MediaLibrary.addAssetsToAlbumAsync(assetRef, albumRef)
} else {
await MediaLibrary.createAlbumAsync(album, assetRef)
}
}
export function getImageDim(path: string): Promise<Dimensions> {
return new Promise((resolve, reject) => {
RNImage.getSize(
path,
(width, height) => {
resolve({width, height})
},
reject,
)
})
}
// internal methods
// =
interface DoResizeOpts {
width: number
height: number
mode: 'contain' | 'cover' | 'stretch'
maxSize: number
}
async function doResize(localUri: string, opts: DoResizeOpts): Promise<Image> {
for (let i = 0; i < 9; i++) {
const quality = 100 - i * 10
const resizeRes = await ImageResizer.createResizedImage(
localUri,
opts.width,
opts.height,
'JPEG',
quality,
undefined,
undefined,
undefined,
{mode: opts.mode},
)
if (resizeRes.size < opts.maxSize) {
return {
path: normalizePath(resizeRes.path),
mime: 'image/jpeg',
size: resizeRes.size,
width: resizeRes.width,
height: resizeRes.height,
}
}
}
throw new Error(
`This image is too big! We couldn't compress it down to ${opts.maxSize} bytes`,
)
}
async function moveToPermanentPath(path: string, ext = ''): Promise<string> {
/*
Since this package stores images in a temp directory, we need to move the file to a permanent location.
Relevant: IOS bug when trying to open a second time:
https://github.com/ivpusic/react-native-image-crop-picker/issues/1199
*/
const filename = uuid.v4()
const destinationPath = joinPath(
RNFS.TemporaryDirectoryPath,
`${filename}${ext}`,
)
await RNFS.moveFile(path, destinationPath)
return normalizePath(destinationPath)
}
function joinPath(a: string, b: string) {
if (a.endsWith('/')) {
if (b.startsWith('/')) {
return a.slice(0, -1) + b
}
return a + b
} else if (b.startsWith('/')) {
return a + b
}
return a + '/' + b
}
function normalizePath(str: string, allPlatforms = false): string {
if (isAndroid || allPlatforms) {
if (!str.startsWith('file://')) {
return `file://${str}`
}
}
return str
}
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