feat: add revoke mutation + handler

Author: lakhansamani

server/graph/generated/generated.go

@@ -267,6 +267,10 @@ input PaginatedInput {
 	pagination: PaginationInput
 }
 
+input OAuthRevokeInput {
+	refresh_token: String!
+}
+
 type Mutation {
 	signup(params: SignUpInput!): AuthResponse!
 	login(params: LoginInput!): AuthResponse!
@@ -277,6 +281,7 @@ type Mutation {
 	resend_verify_email(params: ResendVerifyEmailInput!): Response!
 	forgot_password(params: ForgotPasswordInput!): Response!
 	reset_password(params: ResetPasswordInput!): Response!
+	revoke(params: OAuthRevokeInput!): Response!
 	# admin only apis
 	_delete_user(params: DeleteUserInput!): Response!
 	_update_user(params: UpdateUserInput!): User!

server/graph/model/models_gen.go

@@ -47,6 +47,10 @@ func (r *mutationResolver) ResetPassword(ctx context.Context, params model.Reset
 	return resolvers.ResetPasswordResolver(ctx, params)
 }
 
+func (r *mutationResolver) Revoke(ctx context.Context, params model.OAuthRevokeInput) (*model.Response, error) {
+	return resolvers.RevokeResolver(ctx, params)
+}
+
 func (r *mutationResolver) DeleteUser(ctx context.Context, params model.DeleteUserInput) (*model.Response, error) {
 	return resolvers.DeleteUserResolver(ctx, params)
 }
@@ -105,5 +109,7 @@ func (r *Resolver) Mutation() generated.MutationResolver { return &mutationResol
 // Query returns generated.QueryResolver implementation.
 func (r *Resolver) Query() generated.QueryResolver { return &queryResolver{r} }
 
-type mutationResolver struct{ *Resolver }
-type queryResolver struct{ *Resolver }
+type (
+	mutationResolver struct{ *Resolver }
+	queryResolver    struct{ *Resolver }
+)

server/graph/schema.graphqls

@@ -9,6 +9,7 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+// Handler to logout user
 func LogoutHandler() gin.HandlerFunc {
 	return func(gc *gin.Context) {
 		// get fingerprint hash

server/graph/schema.resolvers.go

@@ -0,0 +1,50 @@
+package handlers
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/authorizerdev/authorizer/server/constants"
+	"github.com/authorizerdev/authorizer/server/envstore"
+	"github.com/authorizerdev/authorizer/server/sessionstore"
+	"github.com/gin-gonic/gin"
+)
+
+// Revoke handler to revoke refresh token
+func RevokeHandler() gin.HandlerFunc {
+	return func(gc *gin.Context) {
+		var reqBody map[string]string
+		if err := gc.BindJSON(&reqBody); err != nil {
+			gc.JSON(http.StatusBadRequest, gin.H{
+				"error":             "error_binding_json",
+				"error_description": err.Error(),
+			})
+			return
+		}
+		// get fingerprint hash
+		refreshToken := strings.TrimSpace(reqBody["refresh_token"])
+		clientID := strings.TrimSpace(reqBody["client_id"])
+
+		if clientID == "" {
+			gc.JSON(http.StatusBadRequest, gin.H{
+				"error":             "client_id_required",
+				"error_description": "The client id is required",
+			})
+			return
+		}
+
+		if clientID != envstore.EnvStoreObj.GetStringStoreEnvVariable(constants.EnvKeyClientID) {
+			gc.JSON(http.StatusBadRequest, gin.H{
+				"error":             "invalid_client_id",
+				"error_description": "The client id is invalid",
+			})
+			return
+		}
+
+		sessionstore.RemoveState(refreshToken)
+
+		gc.JSON(http.StatusOK, gin.H{
+			"message": "Token revoked successfully",
+		})
+	}
+}

server/handlers/logout.go

@@ -15,6 +15,7 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+// TokenHandler to handle /oauth/token requests
 // grant type required
 func TokenHandler() gin.HandlerFunc {
 	return func(gc *gin.Context) {

server/handlers/revoke.go

@@ -0,0 +1,16 @@
+package resolvers
+
+import (
+	"context"
+
+	"github.com/authorizerdev/authorizer/server/graph/model"
+	"github.com/authorizerdev/authorizer/server/sessionstore"
+)
+
+// RevokeResolver resolver to revoke refresh token
+func RevokeResolver(ctx context.Context, params model.OAuthRevokeInput) (*model.Response, error) {
+	sessionstore.RemoveState(params.RefreshToken)
+	return &model.Response{
+		Message: "Token revoked",
+	}, nil
+}

server/handlers/token.go

@@ -27,6 +27,7 @@ func InitRouter() *gin.Engine {
 	router.GET("/userinfo", handlers.UserInfoHandler())
 	router.GET("/logout", handlers.LogoutHandler())
 	router.POST("/oauth/token", handlers.TokenHandler())
+	router.POST("/oauth/revoke", handlers.RevokeHandler())
 
 	router.LoadHTMLGlob("templates/*")
 	// login page app related routes.