Fixed #83

src/screens/ImageViewer/save.ts

@@ -0,0 +1,44 @@
+import haptics from '@components/haptics'
+import CameraRoll from '@react-native-community/cameraroll'
+import { FileSystem, Permissions } from 'react-native-unimodules'
+
+const saveIos = async (
+  image: Nav.RootStackParamList['Screen-ImagesViewer']['imageUrls'][0]
+) => {
+  CameraRoll.save(image.url)
+    .then(() => haptics('Success'))
+    .catch(() => {
+      if (image.remote_url) {
+        CameraRoll.save(image.remote_url)
+          .then(() => haptics('Success'))
+          .catch(() => haptics('Error'))
+      } else {
+        haptics('Error')
+      }
+    })
+}
+
+const saveAndroid = async (
+  image: Nav.RootStackParamList['Screen-ImagesViewer']['imageUrls'][0]
+) => {
+  const fileUri: string = `${FileSystem.documentDirectory}test.jpg`
+  const downloadedFile: FileSystem.FileSystemDownloadResult = await FileSystem.downloadAsync(
+    image.url,
+    fileUri
+  )
+
+  if (downloadedFile.status != 200) {
+    console.warn('error!')
+  }
+
+  const perm = await Permissions.askAsync(Permissions.MEDIA_LIBRARY)
+  if (perm.status != 'granted') {
+    return
+  }
+
+  CameraRoll.save(downloadedFile.uri)
+    .then(() => haptics('Success'))
+    .catch(() => haptics('Error'))
+}
+
+export { saveIos, saveAndroid }