Implement image uploading in the web composer

src/lib/media/manip.web.ts

@@ -0,0 +1,88 @@
+// import {Share} from 'react-native'
+// import * as Toast from 'view/com/util/Toast'
+
+export interface DownloadAndResizeOpts {
+  uri: string
+  width: number
+  height: number
+  mode: 'contain' | 'cover' | 'stretch'
+  maxSize: number
+  timeout: number
+}
+
+export interface Image {
+  path: string
+  mime: string
+  size: number
+  width: number
+  height: number
+}
+
+export async function downloadAndResize(_opts: DownloadAndResizeOpts) {
+  // TODO
+  throw new Error('TODO')
+}
+
+export interface ResizeOpts {
+  width: number
+  height: number
+  mode: 'contain' | 'cover' | 'stretch'
+  maxSize: number
+}
+
+export async function resize(
+  _localUri: string,
+  _opts: ResizeOpts,
+): Promise<Image> {
+  // TODO
+  throw new Error('TODO')
+}
+
+export async function compressIfNeeded(
+  img: Image,
+  maxSize: number,
+): Promise<Image> {
+  if (img.size > maxSize) {
+    // TODO
+    throw new Error(
+      "This image is too large and we haven't implemented compression yet -- sorry!",
+    )
+  }
+  return img
+}
+
+export interface Dim {
+  width: number
+  height: number
+}
+export function scaleDownDimensions(dim: Dim, max: Dim): Dim {
+  if (dim.width < max.width && dim.height < max.height) {
+    return dim
+  }
+  let wScale = dim.width > max.width ? max.width / dim.width : 1
+  let hScale = dim.height > max.height ? max.height / dim.height : 1
+  if (wScale < hScale) {
+    return {width: dim.width * wScale, height: dim.height * wScale}
+  }
+  return {width: dim.width * hScale, height: dim.height * hScale}
+}
+
+export async function saveImageModal(_opts: {uri: string}) {
+  // TODO
+  throw new Error('TODO')
+}
+
+export async function moveToPremanantPath(path: string) {
+  return path
+}
+
+export async function getImageDim(path: string): Promise<Dim> {
+  var img = document.createElement('img')
+  const promise = new Promise((resolve, reject) => {
+    img.onload = resolve
+    img.onerror = reject
+  })
+  img.src = path
+  await promise
+  return {width: img.width, height: img.height}
+}