fix(portal): skip unconfigured oauth providers

TaxBaik.Web/Program.cs

@@ -64,7 +64,7 @@ if (isProduction && jwtKey.Contains("dev-secret", StringComparison.OrdinalIgnore
     throw new InvalidOperationException("Production JWT SecretKey must not use the development default.");
 var key = Encoding.ASCII.GetBytes(jwtKey);
 
-builder.Services.AddAuthentication(opts =>
+var authenticationBuilder = builder.Services.AddAuthentication(opts =>
 {
     opts.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
     opts.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
@@ -100,19 +100,30 @@ builder.Services.AddAuthentication(opts =>
     opts.Cookie.HttpOnly = true;
     opts.Cookie.SameSite = SameSiteMode.Lax;
     opts.Cookie.SecurePolicy = isProduction ? CookieSecurePolicy.Always : CookieSecurePolicy.SameAsRequest;
-})
+});
-.AddGoogle(PortalOAuthDefaults.GoogleScheme, opts =>
+
+var googleClientId = builder.Configuration["Authentication:Google:ClientId"];
+var googleClientSecret = builder.Configuration["Authentication:Google:ClientSecret"];
+if (!string.IsNullOrWhiteSpace(googleClientId) && !string.IsNullOrWhiteSpace(googleClientSecret))
 {
+    authenticationBuilder.AddGoogle(PortalOAuthDefaults.GoogleScheme, opts =>
+    {
         opts.SignInScheme = PortalOAuthDefaults.ExternalScheme;
-    opts.ClientId = builder.Configuration["Authentication:Google:ClientId"] ?? "";
+        opts.ClientId = googleClientId;
-    opts.ClientSecret = builder.Configuration["Authentication:Google:ClientSecret"] ?? "";
+        opts.ClientSecret = googleClientSecret;
         opts.CallbackPath = "/taxbaik/portal/signin-google";
-})
+    });
-.AddOAuth(PortalOAuthDefaults.NaverScheme, opts =>
+}
+
+var naverClientId = builder.Configuration["Authentication:Naver:ClientId"];
+var naverClientSecret = builder.Configuration["Authentication:Naver:ClientSecret"];
+if (!string.IsNullOrWhiteSpace(naverClientId) && !string.IsNullOrWhiteSpace(naverClientSecret))
 {
+    authenticationBuilder.AddOAuth(PortalOAuthDefaults.NaverScheme, opts =>
+    {
         opts.SignInScheme = PortalOAuthDefaults.ExternalScheme;
-    opts.ClientId = builder.Configuration["Authentication:Naver:ClientId"] ?? "";
+        opts.ClientId = naverClientId;
-    opts.ClientSecret = builder.Configuration["Authentication:Naver:ClientSecret"] ?? "";
+        opts.ClientSecret = naverClientSecret;
         opts.CallbackPath = "/taxbaik/portal/signin-naver";
         opts.AuthorizationEndpoint = "https://nid.naver.com/oauth2.0/authorize";
         opts.TokenEndpoint = "https://nid.naver.com/oauth2.0/token";
@@ -133,12 +144,18 @@ builder.Services.AddAuthentication(opts =>
                 context.Identity?.AddClaim(new System.Security.Claims.Claim(System.Security.Claims.ClaimTypes.Email, responseRoot.GetProperty("email").GetString() ?? ""));
             }
         };
-})
+    });
-.AddOAuth(PortalOAuthDefaults.KakaoScheme, opts =>
+}
+
+var kakaoClientId = builder.Configuration["Authentication:Kakao:ClientId"];
+var kakaoClientSecret = builder.Configuration["Authentication:Kakao:ClientSecret"];
+if (!string.IsNullOrWhiteSpace(kakaoClientId) && !string.IsNullOrWhiteSpace(kakaoClientSecret))
 {
+    authenticationBuilder.AddOAuth(PortalOAuthDefaults.KakaoScheme, opts =>
+    {
         opts.SignInScheme = PortalOAuthDefaults.ExternalScheme;
-    opts.ClientId = builder.Configuration["Authentication:Kakao:ClientId"] ?? "";
+        opts.ClientId = kakaoClientId;
-    opts.ClientSecret = builder.Configuration["Authentication:Kakao:ClientSecret"] ?? "";
+        opts.ClientSecret = kakaoClientSecret;
         opts.CallbackPath = "/taxbaik/portal/signin-kakao";
         opts.AuthorizationEndpoint = "https://kauth.kakao.com/oauth/authorize";
         opts.TokenEndpoint = "https://kauth.kakao.com/oauth/token";
@@ -161,7 +178,8 @@ builder.Services.AddAuthentication(opts =>
                     context.Identity?.AddClaim(new System.Security.Claims.Claim(System.Security.Claims.ClaimTypes.Email, emailProp.GetString() ?? ""));
             }
         };
-});
+    });
+}
 
 // Blazor 인증
 builder.Services.AddScoped<AuthService>();