/// <summary>
/// Shared method to create an IConfidentialClientApplication from configuration and attach the application's token cache implementation
/// </summary>
/// <param name="currentUser">The current ClaimsPrincipal</param>
/// <returns></returns>
public static IConfidentialClientApplication BuildConfidentialClientApplication(ClaimsPrincipal currentUser)
{
IConfidentialClientApplication clientapp = ConfidentialClientApplicationBuilder.Create(Globals.ClientId)
.WithClientSecret(Globals.ClientSecret)
.WithRedirectUri(Globals.RedirectUri)
.WithAuthority(new Uri(Globals.Authority))
.Build();
// After the ConfidentialClientApplication is created, we overwrite its default UserTokenCache with our implementation
MSALPerUserMemoryTokenCache userTokenCache = new MSALPerUserMemoryTokenCache(clientapp.UserTokenCache, currentUser ?? ClaimsPrincipal.Current);
return clientapp;
}
/// <summary>
/// Common method to remove the cached tokens for the currently signed in user
/// </summary>
/// <returns></returns>
public static async Task ClearUserTokenCache()
{
IConfidentialClientApplication clientapp = ConfidentialClientApplicationBuilder.Create(Globals.ClientId)
.WithClientSecret(Globals.ClientSecret)
.WithRedirectUri(Globals.RedirectUri)
.WithAuthority(new Uri(Globals.Authority))
.Build();
// We only clear the user's tokens.
MSALPerUserMemoryTokenCache userTokenCache = new MSALPerUserMemoryTokenCache(clientapp.UserTokenCache);
var userAccount = await clientapp.GetAccountAsync(ClaimsPrincipal.Current.GetMsalAccountId());
//Remove the users from the MSAL's internal cache
await clientapp.RemoveAsync(userAccount);
userTokenCache.Clear();
}