/// <summary>
/// 判斷這個使用者是否已經通過了身分驗證
/// </summary>
/// <returns></returns>
public static async Task <Account> IsAlreadyAuthenticated()
{
// 取得 Prism 相依性服務使用到的容器
IUnityContainer fooContainer = (XFoAuth2.App.Current as PrismApplication).Container;
// 取得 IAccountStore 介面實際實作的類別物件
IAccountStore fooIAccountStore = fooContainer.Resolve <IAccountStore>();
#region 若可以取得使用者認證的使用者資訊，表示，這個使用者已經通過認證了
if (fooIAccountStore.GetPlatform() == "UWP")
{
return(await fooIAccountStore.GetAccount());
}
else
{
// Retrieve any stored account information
var accounts = await AccountStore.Create().FindAccountsForServiceAsync(AppName);
var account = accounts.FirstOrDefault();
// If we already have the account info then we are set
if (account == null)
{
return(null);
}
return(account);
}
#endregion
}
/// <summary>
/// 根據通過身分驗證的資訊(如 存取權杖)，取得該使用者的明細資訊
/// </summary>
/// <param name="account"></param>
/// <returns></returns>
public static async Task FetchUserProfile(Account account)
{
// 取得 Prism 相依性服務使用到的容器
IUnityContainer fooContainer = (XFoAuth2.App.Current as PrismApplication).Container;
// 取得 IAccountStore 介面實際實作的類別物件
IAccountStore fooIAccountStore = fooContainer.Resolve <IAccountStore>();
if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Google)
{
// 取得 OAuth2 需要用到的參數定義物件
var fooOAuthParas = OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Google);
// 取得使用者的詳細資訊
var request = new OAuth2Request("GET", new Uri(fooOAuthParas.UserInfoUrl), null, account);
var response = await request.GetResponseAsync();
if (response != null)
{
// 取得回傳的 JSON 格式文字
var userJson = response.GetResponseText();
var user = JsonConvert.DeserializeObject <GoogleUserProfile>(userJson);
var foo = user;
#region 將認證通過的相關使用者明細資訊，儲存到 Account 物件內
account.Properties[Constants.IDAccountProperty] = user.Id;
account.Properties[Constants.NameAccountProperty] = user.Name;
account.Properties[Constants.EmailAccountProperty] = user.Email;
account.Properties[Constants.PhotoAccountProperty] = user.Picture;
account.Properties[Constants.LoginTypeAccountProperty] = AuthenticationHelper.OAuthType.ToString();
#endregion
#region 將通過認證的 OAuth2 帳號與使用者詳細資訊，儲存到本機上(其中 Xamarin.Auth 並不支援 UWP，所以，使用相依性注入服務來解決
if (fooIAccountStore.GetPlatform() == "UWP")
{
await fooIAccountStore.SaveAccount(account);
}
else
{
AccountStore.Create().Save(account, AuthenticationHelper.AppName);
}
#endregion
}
}
else
{
// 取得 OAuth2 需要用到的參數定義物件
var fooOAuthParas = OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Facebook);
// 取得使用者的詳細資訊
var request = new OAuth2Request("GET", new Uri(fooOAuthParas.UserInfoUrl), null, account);
var response = await request.GetResponseAsync();
if (response != null)
{
// 取得回傳的 JSON 格式文字
var userJson = response.GetResponseText();
string fooJson = userJson;
var user = JsonConvert.DeserializeObject <FacebookUserProfile>(userJson);
var foo = user;
#region 將認證通過的相關使用者明細資訊，儲存到 Account 物件內
account.Properties[Constants.IDAccountProperty] = user.id;
account.Properties[Constants.NameAccountProperty] = $"{user.first_name} {user.name}";
account.Properties[Constants.EmailAccountProperty] = user.email;
account.Properties[Constants.PhotoAccountProperty] = user.picture.data.url;
account.Properties[Constants.LoginTypeAccountProperty] = AuthenticationHelper.OAuthType.ToString();
#endregion
#region 將通過認證的 OAuth2 帳號與使用者詳細資訊，儲存到本機上(其中 Xamarin.Auth 並不支援 UWP，所以，使用相依性注入服務來解決
if (fooIAccountStore.GetPlatform() == "UWP")
{
await fooIAccountStore.SaveAccount(account);
}
else
{
AccountStore.Create().Save(account, AuthenticationHelper.AppName);
}
#endregion
}
}
}