Add timezone to API calls [VPNWIN-2702]

Author: Mindaugas Veblauskas

Directory.Packages.props

@@ -90,6 +90,7 @@
     <PackageVersion Include="System.Text.Json" Version="9.0.1" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.6.0" />
     <PackageVersion Include="System.ValueTuple" Version="4.5.0" />
+    <PackageVersion Include="TimeZoneConverter" Version="7.0.0" />
     <PackageVersion Include="Vanara.PInvoke.PowrProf" Version="4.0.4" />
     <PackageVersion Include="Vanara.PInvoke.Security" Version="4.0.4" />
     <PackageVersion Include="Vanara.PInvoke.User32" Version="4.0.4" />

src/Api/ProtonVPN.Api/BaseApiClient.cs

@@ -34,6 +34,7 @@
 using ProtonVPN.Configurations.Contracts;
 using ProtonVPN.Logging.Contracts;
 using ProtonVPN.Logging.Contracts.Events.ApiLogs;
+using TimeZoneConverter;
 
 namespace ProtonVPN.Api;
 
@@ -163,6 +164,16 @@ protected HttpRequestMessage GetUnauthorizedRequest(HttpMethod method, string re
         request.Headers.Add("x-pm-appversion", _appVersion.AppVersion);
         request.Headers.Add("x-pm-locale", Settings.Language);
         request.Headers.Add("User-Agent", _appVersion.UserAgent);
+
+        try
+        {
+            request.Headers.Add("x-pm-timezone", TZConvert.WindowsToIana(TimeZoneInfo.Local.Id));
+        }
+        catch (Exception e)
+        {
+            Logger.Error<ApiLog>("Failed to set x-pm-timezone header", e);
+        }
+
         return request;
     }
 

src/Api/ProtonVPN.Api/ProtonVPN.Api.csproj

@@ -30,5 +30,6 @@
         <PackageReference Include="System.Formats.Asn1" />
         <PackageReference Include="System.Net.Http" />
         <PackageReference Include="System.Text.Json" />
+        <PackageReference Include="TimeZoneConverter" />
     </ItemGroup>
 </Project>

src/Client/ProtonVPN.Client/UI/Main/Settings/Pages/About/LicensingPageView.xaml

@@ -209,6 +209,12 @@ along with ProtonVPN.  If not, see <https://www.gnu.org/licenses/>.
                 <Hyperlink NavigateUri="https://raw.githubusercontent.com/getsentry/sentry-dotnet/master/LICENSE">The MIT License</Hyperlink>
                 <Run/>
             </Paragraph>
+            <Paragraph TextIndent="20">
+                •
+                <Hyperlink NavigateUri="https://github.com/mattjohnsonpint/TimeZoneConverter">TimeZoneConverter</Hyperlink> by Matt Johnson-Pint |
+                <Hyperlink NavigateUri="https://github.com/mattjohnsonpint/TimeZoneConverter/blob/main/LICENSE.txt">The MIT License</Hyperlink>
+                <Run/>
+            </Paragraph>
             <Paragraph TextIndent="20">
                 •
                 <Hyperlink NavigateUri="https://github.com/dahall/vanara">Vanara</Hyperlink> by David Hall |