Break out the web/native image picking code and make some progress on the web version

src/view/com/util/images/image-crop-picker/ImageCropPicker.web.tsx

@@ -0,0 +1,75 @@
+/// <reference lib="dom" />
+
+import {CropImageModal} from '../../../../../state/models/shell-ui'
+import {PickerOpts, CameraOpts, CropperOpts, PickedMedia} from './types'
+export type {PickedMedia} from './types'
+import {RootStoreModel} from '../../../../../state'
+
+interface PickedFile {
+  uri: string
+  path: string
+  size: number
+}
+
+export async function openPicker(
+  store: RootStoreModel,
+  opts: PickerOpts,
+): Promise<PickedMedia[] | PickedMedia> {
+  const res = await selectFile(opts)
+  return new Promise((resolve, reject) => {
+    store.shell.openModal(
+      new CropImageModal(res.uri, (img?: PickedMedia) => {
+        if (img) {
+          resolve(img)
+        } else {
+          reject(new Error('Canceled'))
+        }
+      }),
+    )
+  })
+}
+
+export async function openCamera(
+  _store: RootStoreModel,
+  opts: CameraOpts,
+): Promise<PickedMedia> {
+  const mediaType = opts.mediaType || 'photo'
+  throw new Error('TODO')
+}
+
+export async function openCropper(
+  _store: RootStoreModel,
+  opts: CropperOpts,
+): Promise<PickedMedia> {
+  const mediaType = opts.mediaType || 'photo'
+  throw new Error('TODO')
+}
+
+function selectFile(opts: PickerOpts): Promise<PickedFile> {
+  return new Promise((resolve, reject) => {
+    var input = document.createElement('input')
+    input.type = 'file'
+    input.accept = opts.mediaType === 'photo' ? 'image/*' : '*/*'
+    input.onchange = e => {
+      const target = e.target as HTMLInputElement
+      const file = target?.files?.[0]
+      if (!file) {
+        return reject(new Error('Canceled'))
+      }
+
+      var reader = new FileReader()
+      reader.readAsDataURL(file)
+      reader.onload = readerEvent => {
+        if (!readerEvent.target) {
+          return reject(new Error('Canceled'))
+        }
+        resolve({
+          uri: readerEvent.target.result as string,
+          path: file.name,
+          size: file.size,
+        })
+      }
+    }
+    input.click()
+  })
+}