feat: multiple oauth providers (#355)

* feat: add flag decoder (candidate)

* refactor: finalize flags decoder

* feat: add env decoder

* feat: add oauth config parsing logic

* feat: implement backend logic for multiple oauth providers

* feat: implement multiple oauth providers in the frontend

* feat: add some default icons

* chore: add credits for parser

* feat: style oauth auto redirect screen

* fix: bot suggestions

* refactor: rework decoders using simpler and more efficient pattern

* refactor: rework oauth name database migration

internal/service/auth_service.go

@@ -210,6 +210,7 @@ func (auth *AuthService) CreateSessionCookie(c *gin.Context, data *config.Sessio
 		TOTPPending: data.TotpPending,
 		OAuthGroups: data.OAuthGroups,
 		Expiry:      time.Now().Add(time.Duration(expiry) * time.Second).Unix(),
+		OAuthName:   data.OAuthName,
 	}
 
 	err = auth.database.Create(&session).Error
@@ -278,6 +279,7 @@ func (auth *AuthService) GetSessionCookie(c *gin.Context) (config.SessionCookie,
 		Provider:    session.Provider,
 		TotpPending: session.TOTPPending,
 		OAuthGroups: session.OAuthGroups,
+		OAuthName:   session.OAuthName,
 	}, nil
 }
 

internal/service/generic_oauth_service.go

@@ -22,6 +22,7 @@ type GenericOAuthService struct {
 	verifier           string
 	insecureSkipVerify bool
 	userinfoUrl        string
+	name               string
 }
 
 func NewGenericOAuthService(config config.OAuthServiceConfig) *GenericOAuthService {
@@ -38,6 +39,7 @@ func NewGenericOAuthService(config config.OAuthServiceConfig) *GenericOAuthServi
 		},
 		insecureSkipVerify: config.InsecureSkipVerify,
 		userinfoUrl:        config.UserinfoURL,
+		name:               config.Name,
 	}
 }
 
@@ -115,3 +117,7 @@ func (generic *GenericOAuthService) Userinfo() (config.Claims, error) {
 
 	return user, nil
 }
+
+func (generic *GenericOAuthService) GetName() string {
+	return generic.name
+}

internal/service/github_oauth_service.go

@@ -33,6 +33,7 @@ type GithubOAuthService struct {
 	context  context.Context
 	token    *oauth2.Token
 	verifier string
+	name     string
 }
 
 func NewGithubOAuthService(config config.OAuthServiceConfig) *GithubOAuthService {
@@ -44,6 +45,7 @@ func NewGithubOAuthService(config config.OAuthServiceConfig) *GithubOAuthService
 			Scopes:       GithubOAuthScopes,
 			Endpoint:     endpoints.GitHub,
 		},
+		name: config.Name,
 	}
 }
 
@@ -167,3 +169,7 @@ func (github *GithubOAuthService) Userinfo() (config.Claims, error) {
 
 	return user, nil
 }
+
+func (github *GithubOAuthService) GetName() string {
+	return github.name
+}

internal/service/google_oauth_service.go

@@ -28,6 +28,7 @@ type GoogleOAuthService struct {
 	context  context.Context
 	token    *oauth2.Token
 	verifier string
+	name     string
 }
 
 func NewGoogleOAuthService(config config.OAuthServiceConfig) *GoogleOAuthService {
@@ -39,6 +40,7 @@ func NewGoogleOAuthService(config config.OAuthServiceConfig) *GoogleOAuthService
 			Scopes:       GoogleOAuthScopes,
 			Endpoint:     endpoints.Google,
 		},
+		name: config.Name,
 	}
 }
 
@@ -111,3 +113,7 @@ func (google *GoogleOAuthService) Userinfo() (config.Claims, error) {
 
 	return user, nil
 }
+
+func (google *GoogleOAuthService) GetName() string {
+	return google.name
+}

internal/service/oauth_broker_service.go

@@ -14,6 +14,7 @@ type OAuthService interface {
 	GetAuthURL(state string) string
 	VerifyCode(code string) error
 	Userinfo() (config.Claims, error)
+	GetName() string
 }
 
 type OAuthBrokerService struct {