feat: check image size

src/screens/Profile.tsx

@@ -1,7 +1,8 @@
 import { useState } from 'react';
-import { ScrollView, TouchableOpacity } from 'react-native';
+import { Alert, ScrollView, TouchableOpacity } from 'react-native';
 import { Center, Heading, Text, VStack } from '@gluestack-ui/themed';
 import * as ImagePicker from 'expo-image-picker';
+import * as FileSystem from 'expo-file-system';
 
 import { Button } from '@components/Button';
 import { Input } from '@components/Input';
@@ -12,18 +13,34 @@ export function Profile() {
   const [userPhoto, setUserPhoto] = useState('https://i.pravatar.cc/200');
 
   async function handleUserPhotoSelection() {
-    const photoSelection = await ImagePicker.launchImageLibraryAsync({
-      mediaTypes: ImagePicker.MediaTypeOptions.Images,
-      quality: 1,
-      aspect: [4, 4],
-      allowsEditing: true,
-    });
+    try {
+      const photoSelection = await ImagePicker.launchImageLibraryAsync({
+        mediaTypes: ImagePicker.MediaTypeOptions.Images,
+        quality: 1,
+        aspect: [4, 4],
+        allowsEditing: true,
+      });
 
-    if (photoSelection.canceled) {
-      return;
+      if (photoSelection.canceled) {
+        return;
+      }
+
+      const photoURI = photoSelection.assets[0].uri;
+      if (photoURI) {
+        // for some reason type `FileInfo` does not show `size` field
+        const photoInfo = (await FileSystem.getInfoAsync(photoURI)) as {
+          size: number;
+        };
+
+        if (photoInfo.size && photoInfo.size > 5242880) {
+          return Alert.alert('Essa imagem é muito grande. Escolha uma de até 5MB');
+        }
+
+        setUserPhoto(photoURI);
+      }
+    } catch (error) {
+      console.error(error);
     }
-
-    setUserPhoto(photoSelection.assets[0].uri);
   }
 
   return (