fix: Better handling of durations. Fixes #4.

Author: Skyost

lib/model/totp/json.dart

@@ -17,7 +17,7 @@ extension JsonTotp on Totp {
       encryptedData: encryptedData,
       algorithm: data[Totp.kAlgorithmKey] is! String ? null : Algorithm.fromString(data[Totp.kAlgorithmKey]),
       digits: data[Totp.kDigitsKey] is! int ? null : data[Totp.kDigitsKey],
-      validity: data[Totp.kValidityKey] is! int ? null : data[Totp.kValidityKey],
+      validity: data[Totp.kValidityKey] is! int ? null : Duration(seconds: data[Totp.kValidityKey]),
     );
   }
 
@@ -27,7 +27,7 @@ extension JsonTotp on Totp {
     ...encryptedData.toJson(),
     if (algorithm != null) Totp.kAlgorithmKey: algorithm!.name,
     if (digits != null) Totp.kDigitsKey: digits,
-    if (validity != null) Totp.kValidityKey: validity,
+    if (validity != null) Totp.kValidityKey: validity!.inSeconds,
   };
 }
 

lib/pages/totp.dart

@@ -297,7 +297,7 @@ class _TotpPageState extends ConsumerState<TotpPage> with BrightnessListener {
         ),
         ListTilePadding(
           child: TextFormField(
-            initialValue: validity?.toString(),
+            initialValue: validity?.inSeconds.toString(),
             onChanged: (value) {
               int? validity = int.tryParse(value);
               setState(() => this.validity = validity == null ? null : Duration(seconds: validity));
@@ -306,7 +306,7 @@ class _TotpPageState extends ConsumerState<TotpPage> with BrightnessListener {
             decoration: FormLabelWithIcon(
               icon: Icons.schedule,
               text: translations.totp.page.validity,
-              hintText: Totp.kDefaultValidity.toString(),
+              hintText: Totp.kDefaultValidity.inSeconds.toString(),
             ),
             validator: validateValidity,
             enabled: enabled,