u8aToB64 js overflow fix

Author: functora

ghcjs/delivery-calculator/delivery-calculator.cabal

@@ -1,6 +1,6 @@
 cabal-version: 2.2
 name:          delivery-calculator
-version:       0.1.0.9
+version:       0.1.0.11
 synopsis:      Delivery Calculator
 category:      Web
 build-type:    Simple

ghcjs/delivery-calculator/trapeze.yaml

@@ -1,8 +1,8 @@
 platforms:
   android:
     appName: Delivery Calculator
-    versionCode: 9
-    versionName: 0.1.0.9
+    versionCode: 11
+    versionName: 0.1.0.11
     packageName: com.functora.delivery_calculator
     manifest:
       - file: AndroidManifest.xml

ghcjs/miso-functora/js/main.js

@@ -156,7 +156,7 @@ export async function selectBarcode() {
 export async function saveFile(name, mime, ab) {
   const u8a = new Uint8Array(ab);
   if (Capacitor.isNativePlatform()) {
-    const b64 = btoa(String.fromCharCode.apply(null, u8a));
+    const b64 = await u8aToB64(u8a);
     const { uri } = await Filesystem.writeFile({
       path: name,
       data: b64,
@@ -170,6 +170,18 @@ export async function saveFile(name, mime, ab) {
   }
 }
 
+async function u8aToB64(u8a) {
+  const b64 = await new Promise((resolve, reject) => {
+    const fr = new FileReader();
+    fr.onload = () => {
+      resolve(fr.result);
+    };
+    fr.onerror = reject;
+    fr.readAsDataURL(new Blob([u8a]));
+  });
+  return b64.slice(b64.indexOf(",") + 1);
+}
+
 export async function shareFiles(files) {
   if (Capacitor.isNativePlatform()) {
     const { value } = await Share.share({ files: files });