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import {copyAsync} from 'expo-file-system'
import {BskyAgent, ComAtprotoRepoUploadBlob} from '@atproto/api'
import {safeDeleteAsync} from '#/lib/media/manip'
/**
* @param encoding Allows overriding the blob's type
*/
export async function uploadBlob(
agent: BskyAgent,
input: string | Blob,
encoding?: string,
): Promise<ComAtprotoRepoUploadBlob.Response> {
if (typeof input === 'string' && input.startsWith('file:')) {
const blob = await asBlob(input)
return agent.uploadBlob(blob, {encoding})
}
if (typeof input === 'string' && input.startsWith('/')) {
const blob = await asBlob(`file://${input}`)
return agent.uploadBlob(blob, {encoding})
}
if (typeof input === 'string' && input.startsWith('data:')) {
const blob = await fetch(input).then(r => r.blob())
return agent.uploadBlob(blob, {encoding})
}
if (input instanceof Blob) {
return agent.uploadBlob(input, {encoding})
}
throw new TypeError(`Invalid uploadBlob input: ${typeof input}`)
}
async function asBlob(uri: string): Promise<Blob> {
return withSafeFile(uri, async safeUri => {
// Note
// Android does not support `fetch()` on `file://` URIs. for this reason, we
// use XMLHttpRequest instead of simply calling:
// return fetch(safeUri.replace('file:///', 'file:/')).then(r => r.blob())
return await new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest()
xhr.onload = () => resolve(xhr.response)
xhr.onerror = () => reject(new Error('Failed to load blob'))
xhr.responseType = 'blob'
xhr.open('GET', safeUri, true)
xhr.send(null)
})
})
}
// HACK
// React native has a bug that inflates the size of jpegs on upload
// we get around that by renaming the file ext to .bin
// see https://github.com/facebook/react-native/issues/27099
// -prf
async function withSafeFile<T>(
uri: string,
fn: (path: string) => Promise<T>,
): Promise<T> {
if (uri.endsWith('.jpeg') || uri.endsWith('.jpg')) {
// Since we don't "own" the file, we should avoid renaming or modifying it.
// Instead, let's copy it to a temporary file and use that (then remove the
// temporary file).
const newPath = uri.replace(/\.jpe?g$/, '.bin')
try {
await copyAsync({from: uri, to: newPath})
} catch {
// Failed to copy the file, just use the original
return await fn(uri)
}
try {
return await fn(newPath)
} finally {
// Remove the temporary file
await safeDeleteAsync(newPath)
}
} else {
return fn(uri)
}
}
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