| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @flow |
| 8 | */ |
| 9 | |
| 10 | export interface Destination { |
| 11 | push(chunk: string | null): boolean; |
| 12 | destroy(error: Error): mixed; |
| 13 | } |
| 14 | |
| 15 | export opaque type PrecomputedChunk = string; |
| 16 | export opaque type Chunk = string; |
| 17 | export opaque type BinaryChunk = string; |
| 18 | |
| 19 | export function scheduleWork(callback: () => void) { |
| 20 | callback(); |
| 21 | } |
| 22 | |
| 23 | export function scheduleMicrotask(callback: () => void) { |
| 24 | // While this defies the method name the legacy builds have special |
| 25 | // overrides that make work scheduling sync. At the moment scheduleMicrotask |
| 26 | // isn't used by any legacy APIs so this is somewhat academic but if they |
| 27 | // did in the future we'd probably want to have this be in sync with scheduleWork |
| 28 | callback(); |
| 29 | } |
| 30 | |
| 31 | export function flushBuffered(destination: Destination) {} |
| 32 | |
| 33 | export function beginWriting(destination: Destination) {} |
| 34 | |
| 35 | export function writeChunk( |
| 36 | destination: Destination, |
| 37 | chunk: Chunk | PrecomputedChunk | BinaryChunk, |
| 38 | ): void { |
| 39 | writeChunkAndReturn(destination, chunk); |
| 40 | } |
| 41 | |
| 42 | export function writeChunkAndReturn( |
| 43 | destination: Destination, |
| 44 | chunk: Chunk | PrecomputedChunk | BinaryChunk, |
| 45 | ): boolean { |
| 46 | return destination.push(chunk); |
| 47 | } |
| 48 | |
| 49 | export function completeWriting(destination: Destination) {} |
| 50 | |
| 51 | export function close(destination: Destination) { |
| 52 | destination.push(null); |
| 53 | } |
| 54 | |
| 55 | export function stringToChunk(content: string): Chunk { |
| 56 | return content; |
| 57 | } |
| 58 | |
| 59 | export function stringToPrecomputedChunk(content: string): PrecomputedChunk { |
| 60 | return content; |
| 61 | } |
| 62 | |
| 63 | export function typedArrayToBinaryChunk( |
| 64 | content: $ArrayBufferView, |
| 65 | ): BinaryChunk { |
| 66 | throw new Error('Not implemented.'); |
| 67 | } |
| 68 | |
| 69 | export const byteLengthOfChunk: |
| 70 | | null |
| 71 | | ((chunk: Chunk | PrecomputedChunk) => number) = null; |
| 72 | |
| 73 | export function byteLengthOfBinaryChunk(chunk: BinaryChunk): number { |
| 74 | throw new Error('Not implemented.'); |
| 75 | } |
| 76 | |
| 77 | export function closeWithError(destination: Destination, error: mixed): void { |
| 78 | // $FlowFixMe[incompatible-type]: This is an Error object or the destination accepts other types. |
| 79 | destination.destroy(error); |
| 80 | } |
| 81 | |
| 82 | export {createFastHashJS as createFastHash} from 'react-server/src/createFastHashJS'; |
| 83 | |
| 84 | export function readAsDataURL(blob: Blob): Promise<string> { |
| 85 | return blob.arrayBuffer().then(arrayBuffer => { |
| 86 | const encoded = |
| 87 | typeof Buffer === 'function' && typeof Buffer.from === 'function' |
| 88 | ? Buffer.from(arrayBuffer).toString('base64') |
| 89 | : btoa(String.fromCharCode.apply(String, new Uint8Array(arrayBuffer))); |
| 90 | const mimeType = blob.type || 'application/octet-stream'; |
| 91 | return 'data:' + mimeType + ';base64,' + encoded; |
| 92 | }); |
| 93 | } |