Speculative fix to Android camera roll issue (#8397)

src/lib/media/save-image.ts

@@ -0,0 +1,59 @@
+import {useCallback} from 'react'
+import * as MediaLibrary from 'expo-media-library'
+import {t} from '@lingui/macro'
+
+import {isNative} from '#/platform/detection'
+import * as Toast from '#/view/com/util/Toast'
+import {saveImageToMediaLibrary} from './manip'
+
+/**
+ * Same as `saveImageToMediaLibrary`, but also handles permissions and toasts
+ */
+export function useSaveImageToMediaLibrary() {
+  const [permissionResponse, requestPermission, getPermission] =
+    MediaLibrary.usePermissions({
+      granularPermissions: ['photo'],
+    })
+  return useCallback(
+    async (uri: string) => {
+      if (!isNative) {
+        throw new Error('useSaveImageToMediaLibrary is native only')
+      }
+
+      async function save() {
+        try {
+          await saveImageToMediaLibrary({uri})
+          Toast.show(t`Image saved`)
+        } catch (e: any) {
+          Toast.show(t`Failed to save image: ${String(e)}`, 'xmark')
+        }
+      }
+
+      const permission = permissionResponse ?? (await getPermission())
+
+      if (permission.granted) {
+        await save()
+      } else {
+        if (permission.canAskAgain) {
+          // request again once
+          const askAgain = await requestPermission()
+          if (askAgain.granted) {
+            await save()
+          } else {
+            // since we've been explicitly denied, show a toast.
+            Toast.show(
+              t`Images cannot be saved unless permission is granted to access your photo library.`,
+              'xmark',
+            )
+          }
+        } else {
+          Toast.show(
+            t`Permission to access your photo library was denied. Please enable it in your system settings.`,
+            'xmark',
+          )
+        }
+      }
+    },
+    [permissionResponse, requestPermission, getPermission],
+  )
+}