fix: export/sharing notes on mobile webview (#1644)

packages/web/src/javascripts/Utils/Utils.ts

@@ -1,4 +1,4 @@
-import { Platform, platformFromString } from '@standardnotes/snjs'
+import { DeviceInterface, MobileDeviceInterface, Platform, platformFromString } from '@standardnotes/snjs'
 import { IsDesktopPlatform, IsWebPlatform } from '@/Constants/Version'
 import { EMAIL_REGEX } from '../Constants/Constants'
 import { MediaQueryBreakpoints } from '@/Hooks/useMediaQuery'
@@ -31,7 +31,11 @@ export function getPlatformString() {
   }
 }
 
-export function getPlatform(): Platform {
+export function getPlatform(device: DeviceInterface | MobileDeviceInterface): Platform {
+  if ('platform' in device) {
+    return device.platform
+  }
+
   return platformFromString(getPlatformString())
 }
 
@@ -204,3 +208,17 @@ export const disableIosTextFieldZoom = () => {
 }
 
 export const isMobileScreen = () => !window.matchMedia(MediaQueryBreakpoints.md).matches
+
+export const getBase64FromBlob = (blob: Blob) => {
+  return new Promise<string>((resolve, reject) => {
+    const reader = new FileReader()
+    reader.onloadend = () => {
+      if (reader.result) {
+        resolve(reader.result.toString())
+      } else {
+        reject()
+      }
+    }
+    reader.readAsDataURL(blob)
+  })
+}