use expo file system

Author: lohanidamodar

templates/react-native/src/services/template.ts.twig

@@ -2,7 +2,7 @@ import { Service } from '../service';
 import { {{ spec.title | caseUcfirst}}Exception, Client } from '../client';
 import type { Models } from '../models';
 import type { UploadProgress, Payload } from '../client';
-import fs from 'react-native-fs'
+import * as FileSystem from 'expo-file-system';
 
 {% set added = [] %}
 {% for method in service.methods %}
@@ -139,7 +139,11 @@ export class {{ service.name | caseUcfirst }} extends Service {
                 apiHeaders['x-{{spec.title | caseLower }}-id'] = response.$id;
             }
 
-            let chunk = await fs.read({{ parameter.name | caseCamel | escapeKeyword }}.uri, Service.CHUNK_SIZE, offset, 'base64');
+            let chunk = await FileSystem.readAsStringAsync(file.uri, {
+                encoding: FileSystem.EncodingType.Base64,
+                position: offset,
+                length: Service.CHUNK_SIZE
+            });
 
             payload['{{ parameter.name }}'] = {{ '{' }} uri: `data:${{'{'}}{{ parameter.name | caseCamel | escapeKeyword }}.type{{'}'}};base64,${{'{'}}chunk{{'}'}}`, name: {{ parameter.name | caseCamel | escapeKeyword }}.name, type: {{ parameter.name | caseCamel | escapeKeyword }}.type {{ '}' }};