feat: use dig for controllers

internal/bootstrap/app_bootstrap.go

@@ -229,7 +229,7 @@ func (app *BootstrapApp) Setup() error {
 		Queries repository.Store
 	}
 
-	app.dig.Provide(func() utilityProvider {
+	err = app.dig.Provide(func() utilityProvider {
 		return utilityProvider{
 			Log:     app.log,
 			Config:  &app.config,
@@ -240,6 +240,10 @@ func (app *BootstrapApp) Setup() error {
 		}
 	})
 
+	if err != nil {
+		return fmt.Errorf("failed to provide utilities to container: %w", err)
+	}
+
 	// services
 	err = app.setupServices()
 

internal/bootstrap/router_bootstrap.go

@@ -13,6 +13,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/controller"
 	"github.com/tinyauthapp/tinyauth/internal/middleware"
 	"github.com/tinyauthapp/tinyauth/internal/model"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 )
@@ -40,31 +41,119 @@ func (app *BootstrapApp) setupRouter() error {
 		}
 	}
 
-	contextMiddleware := middleware.NewContextMiddleware(app.log, app.runtime, app.services.authService, app.services.oauthBrokerService, app.services.tailscaleService)
-	engine.Use(contextMiddleware.Middleware())
-
-	uiMiddleware, err := middleware.NewUIMiddleware()
+	err := app.dig.Provide(middleware.NewContextMiddleware)
 
 	if err != nil {
-		return fmt.Errorf("failed to initialize UI middleware: %w", err)
+		return fmt.Errorf("failed to provide context middleware: %w", err)
 	}
 
-	engine.Use(uiMiddleware.Middleware())
+	err = app.dig.Provide(middleware.NewUIMiddleware)
 
-	zerologMiddleware := middleware.NewZerologMiddleware(app.log)
+	if err != nil {
+		return fmt.Errorf("failed to provide ui middleware: %w", err)
+	}
 
-	engine.Use(zerologMiddleware.Middleware())
+	err = app.dig.Provide(middleware.NewZerologMiddleware)
 
-	apiRouter := engine.Group("/api")
+	if err != nil {
+		return fmt.Errorf("failed to provide zerolog middleware: %w", err)
+	}
 
-	controller.NewContextController(app.log, app.config, app.runtime, apiRouter)
-	controller.NewOAuthController(app.log, app.config, app.runtime, apiRouter, app.services.authService)
-	controller.NewOIDCController(app.log, app.services.oidcService, app.runtime, apiRouter, &engine.RouterGroup)
-	controller.NewProxyController(app.log, app.runtime, apiRouter, app.services.accessControlService, app.services.authService, app.services.policyEngine)
-	controller.NewUserController(app.log, app.runtime, apiRouter, app.services.authService)
-	controller.NewResourcesController(app.config, &engine.RouterGroup)
-	controller.NewHealthController(apiRouter)
-	controller.NewWellKnownController(app.services.oidcService, &engine.RouterGroup)
+	type middlewareInput struct {
+		dig.In
+
+		ContextMiddleware *middleware.ContextMiddleware
+		UIMiddleware      *middleware.UIMiddleware
+		ZerologMiddleware *middleware.ZerologMiddleware
+	}
+
+	err = app.dig.Invoke(func(mi middlewareInput) {
+		engine.Use(mi.ContextMiddleware.Middleware())
+		engine.Use(mi.UIMiddleware.Middleware())
+		engine.Use(mi.ZerologMiddleware.Middleware())
+	})
+
+	if err != nil {
+		return fmt.Errorf("failed to invoke middleware: %w", err)
+	}
+
+	err = app.dig.Provide(func() *gin.RouterGroup {
+		return &engine.RouterGroup
+	}, dig.Name("mainRouterGroup"))
+
+	if err != nil {
+		return fmt.Errorf("failed to provide main router group: %w", err)
+	}
+
+	err = app.dig.Provide(func() *gin.RouterGroup {
+		return engine.Group("/api")
+	}, dig.Name("apiRouterGroup"))
+
+	if err != nil {
+		return fmt.Errorf("failed to provide api router group: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewContextController)
+	if err != nil {
+		return fmt.Errorf("failed to provide context controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewOAuthController)
+	if err != nil {
+		return fmt.Errorf("failed to provide oauth controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewOIDCController)
+	if err != nil {
+		return fmt.Errorf("failed to provide oidc controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewProxyController)
+	if err != nil {
+		return fmt.Errorf("failed to provide proxy controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewUserController)
+	if err != nil {
+		return fmt.Errorf("failed to provide user controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewResourcesController)
+	if err != nil {
+		return fmt.Errorf("failed to provide resources controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewHealthController)
+	if err != nil {
+		return fmt.Errorf("failed to provide health controller: %w", err)
+	}
+
+	err = app.dig.Provide(controller.NewWellKnownController)
+	if err != nil {
+		return fmt.Errorf("failed to provide well-known controller: %w", err)
+	}
+
+	type controllerInput struct {
+		dig.In
+
+		ContextController   *controller.ContextController
+		OAuthController     *controller.OAuthController
+		OIDCController      *controller.OIDCController
+		ProxyController     *controller.ProxyController
+		UserController      *controller.UserController
+		ResourcesController *controller.ResourcesController
+		HealthController    *controller.HealthController
+		WellKnownController *controller.WellKnownController
+	}
+
+	// force dig to build all controllers and register their routes
+	err = app.dig.Invoke(func(ci controllerInput) error {
+		return nil
+	})
+
+	if err != nil {
+		return fmt.Errorf("failed to invoke controllers: %w", err)
+	}
 
 	app.router = engine
 	return nil

internal/bootstrap/service_bootstrap.go

@@ -9,19 +9,46 @@ import (
 )
 
 func (app *BootstrapApp) setupServices() error {
-	app.setupPolicyEngine()
+	err := app.setupPolicyEngine()
 
-	app.dig.Provide(func() *service.PolicyEngine {
-		return app.services.policyEngine
-	})
+	if err != nil {
+		return fmt.Errorf("failed to setup policy engine: %w", err)
+	}
 
-	app.dig.Provide(app.getLabelProvider)
-	app.dig.Provide(service.NewLdapService)
-	app.dig.Provide(service.NewTailscaleService)
-	app.dig.Provide(service.NewAccessControlsService)
-	app.dig.Provide(service.NewOAuthBrokerService)
-	app.dig.Provide(service.NewAuthService)
-	app.dig.Provide(service.NewOIDCService)
+	err = app.dig.Provide(app.getLabelProvider)
+	if err != nil {
+		return fmt.Errorf("failed to provide label provider: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewLdapService)
+	if err != nil {
+		return fmt.Errorf("failed to provide ldap service: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewTailscaleService)
+	if err != nil {
+		return fmt.Errorf("failed to provide tailscale service: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewAccessControlsService)
+	if err != nil {
+		return fmt.Errorf("failed to provide access controls service: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewOAuthBrokerService)
+	if err != nil {
+		return fmt.Errorf("failed to provide oauth broker service: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewAuthService)
+	if err != nil {
+		return fmt.Errorf("failed to provide auth service: %w", err)
+	}
+
+	err = app.dig.Provide(service.NewOIDCService)
+	if err != nil {
+		return fmt.Errorf("failed to provide oidc service: %w", err)
+	}
 
 	type svcInput struct {
 		dig.In
@@ -34,7 +61,7 @@ func (app *BootstrapApp) setupServices() error {
 		TailscaleService     *service.TailscaleService
 	}
 
-	err := app.dig.Invoke(func(i svcInput) error {
+	err = app.dig.Invoke(func(i svcInput) error {
 		app.services = Services{
 			accessControlService: i.AccessControlService,
 			authService:          i.AuthService,
@@ -45,7 +72,11 @@ func (app *BootstrapApp) setupServices() error {
 		return nil
 	})
 
-	return err
+	if err != nil {
+		return fmt.Errorf("failed to invoke services: %w", err)
+	}
+
+	return nil
 }
 
 func (app *BootstrapApp) getLabelProvider() (service.LabelProvider, error) {
@@ -61,25 +92,41 @@ func (app *BootstrapApp) getLabelProvider() (service.LabelProvider, error) {
 		if useKubernetes {
 			app.log.App.Debug().Msg("Using Kubernetes label provider")
 
-			app.dig.Provide(service.NewKubernetesService)
+			err := app.dig.Provide(service.NewKubernetesService)
 
-			app.dig.Invoke(func(k *service.KubernetesService) error {
+			if err != nil {
+				return nil, fmt.Errorf("failed to provide kubernetes service: %w", err)
+			}
+
+			err = app.dig.Invoke(func(k *service.KubernetesService) error {
 				app.services.kubernetesService = k
 				return nil
 			})
 
+			if err != nil {
+				return nil, fmt.Errorf("failed to invoke kubernetes service: %w", err)
+			}
+
 			return app.services.kubernetesService, nil
 		}
 
 		app.log.App.Debug().Msg("Using Docker label provider")
 
-		app.dig.Provide(service.NewDockerService)
+		err := app.dig.Provide(service.NewDockerService)
 
-		app.dig.Invoke(func(d *service.DockerService) error {
+		if err != nil {
+			return nil, fmt.Errorf("failed to provide docker service: %w", err)
+		}
+
+		err = app.dig.Invoke(func(d *service.DockerService) error {
 			app.services.dockerService = d
 			return nil
 		})
 
+		if err != nil {
+			return nil, fmt.Errorf("failed to invoke docker service: %w", err)
+		}
+
 		if app.services.dockerService == nil {
 			if app.config.LabelProvider == "docker" {
 				app.log.App.Warn().Msg("Docker label provider selected but Docker is not available, will continue without it")
@@ -93,10 +140,14 @@ func (app *BootstrapApp) getLabelProvider() (service.LabelProvider, error) {
 	}
 }
 
-func (app *BootstrapApp) setupPolicyEngine() {
-	app.dig.Provide(service.NewPolicyEngine)
+func (app *BootstrapApp) setupPolicyEngine() error {
+	err := app.dig.Provide(service.NewPolicyEngine)
 
-	app.dig.Invoke(func(policyEngine *service.PolicyEngine) error {
+	if err != nil {
+		return fmt.Errorf("failed to create policy engine: %w", err)
+	}
+
+	err = app.dig.Invoke(func(policyEngine *service.PolicyEngine) error {
 		policyEngine.RegisterRule(service.RuleUserAllowed, &service.UserAllowedRule{
 			Log: app.log,
 		})
@@ -119,4 +170,6 @@ func (app *BootstrapApp) setupPolicyEngine() {
 		})
 		return nil
 	})
+
+	return err
 }

internal/controller/context_controller.go

@@ -3,6 +3,7 @@ package controller
 import (
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 )
@@ -71,29 +72,33 @@ type AppContextResponse struct {
 	App     ACRApp   `json:"app"`
 }
 
-type ContextController struct {
-	log     *logger.Logger
-	config  model.Config
-	runtime model.RuntimeConfig
+type ContextControllerInput struct {
+	dig.In
+
+	Log         *logger.Logger
+	Config      *model.Config
+	Runtime     *model.RuntimeConfig
+	RouterGroup *gin.RouterGroup `name:"apiRouterGroup"`
 }
 
-func NewContextController(
-	log *logger.Logger,
-	config model.Config,
-	runtimeConfig model.RuntimeConfig,
-	router *gin.RouterGroup,
-) *ContextController {
+type ContextController struct {
+	log     *logger.Logger
+	config  *model.Config
+	runtime *model.RuntimeConfig
+}
+
+func NewContextController(i ContextControllerInput) *ContextController {
 	controller := &ContextController{
-		log:     log,
-		config:  config,
-		runtime: runtimeConfig,
+		log:     i.Log,
+		config:  i.Config,
+		runtime: i.Runtime,
 	}
 
-	if !config.UI.WarningsEnabled {
-		log.App.Warn().Msg("UI warnings are disabled. This may lead to security issues if you are not careful. Make sure to enable warnings in production environments.")
+	if !i.Config.UI.WarningsEnabled {
+		i.Log.App.Warn().Msg("UI warnings are disabled. This may lead to security issues if you are not careful. Make sure to enable warnings in production environments.")
 	}
 
-	contextGroup := router.Group("/context")
+	contextGroup := i.RouterGroup.Group("/context")
 	contextGroup.GET("/user", controller.userContextHandler)
 	contextGroup.GET("/app", controller.appContextHandler)
 

internal/controller/health_controller.go

@@ -1,15 +1,24 @@
 package controller
 
-import "github.com/gin-gonic/gin"
+import (
+	"github.com/gin-gonic/gin"
+	"go.uber.org/dig"
+)
 
 type HealthController struct {
 }
 
-func NewHealthController(router *gin.RouterGroup) *HealthController {
+type HealthControllerInput struct {
+	dig.In
+
+	RouterGroup *gin.RouterGroup `name:"apiRouterGroup"`
+}
+
+func NewHealthController(i HealthControllerInput) *HealthController {
 	controller := &HealthController{}
 
-	router.GET("/healthz", controller.healthHandler)
-	router.HEAD("/healthz", controller.healthHandler)
+	i.RouterGroup.GET("/healthz", controller.healthHandler)
+	i.RouterGroup.HEAD("/healthz", controller.healthHandler)
 
 	return controller
 }

internal/controller/oauth_controller.go

@@ -11,6 +11,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/service"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/go-querystring/query"
@@ -22,26 +23,30 @@ type OAuthRequest struct {
 
 type OAuthController struct {
 	log     *logger.Logger
-	config  model.Config
-	runtime model.RuntimeConfig
+	config  *model.Config
+	runtime *model.RuntimeConfig
 	auth    *service.AuthService
 }
 
-func NewOAuthController(
-	log *logger.Logger,
-	config model.Config,
-	runtimeConfig model.RuntimeConfig,
-	router *gin.RouterGroup,
-	auth *service.AuthService,
-) *OAuthController {
+type OAuthControllerInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	Config        *model.Config
+	RuntimeConfig *model.RuntimeConfig
+	RouterGroup   *gin.RouterGroup `name:"apiRouterGroup"`
+	AuthService   *service.AuthService
+}
+
+func NewOAuthController(i OAuthControllerInput) *OAuthController {
 	controller := &OAuthController{
-		log:     log,
-		config:  config,
-		runtime: runtimeConfig,
-		auth:    auth,
+		log:     i.Log,
+		config:  i.Config,
+		runtime: i.RuntimeConfig,
+		auth:    i.AuthService,
 	}
 
-	oauthGroup := router.Group("/oauth")
+	oauthGroup := i.RouterGroup.Group("/oauth")
 	oauthGroup.GET("/url/:provider", controller.oauthURLHandler)
 	oauthGroup.GET("/callback/:provider", controller.oauthCallbackHandler)
 

internal/controller/oidc_controller.go

@@ -11,6 +11,7 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/gin-gonic/gin/binding"
 	"github.com/google/go-querystring/query"
+	"go.uber.org/dig"
 
 	"github.com/tinyauthapp/tinyauth/internal/model"
 	"github.com/tinyauthapp/tinyauth/internal/service"
@@ -30,7 +31,7 @@ type authorizeErrorParams struct {
 type OIDCController struct {
 	log     *logger.Logger
 	oidc    *service.OIDCService
-	runtime model.RuntimeConfig
+	runtime *model.RuntimeConfig
 }
 
 type AuthorizeCallback struct {
@@ -78,22 +79,27 @@ type AuthorizeCompleteRequest struct {
 	Ticket string `json:"ticket" binding:"required"`
 }
 
-func NewOIDCController(
-	log *logger.Logger,
-	oidcService *service.OIDCService,
-	runtimeConfig model.RuntimeConfig,
-	router *gin.RouterGroup,
-	mainRouter *gin.RouterGroup) *OIDCController {
+type OIDCControllerInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	OIDCService   *service.OIDCService
+	RuntimeConfig *model.RuntimeConfig
+	RouterGroup   *gin.RouterGroup `name:"apiRouterGroup"`
+	MainRouter    *gin.RouterGroup `name:"mainRouterGroup"`
+}
+
+func NewOIDCController(i OIDCControllerInput) *OIDCController {
 	controller := &OIDCController{
-		log:     log,
-		oidc:    oidcService,
-		runtime: runtimeConfig,
+		log:     i.Log,
+		oidc:    i.OIDCService,
+		runtime: i.RuntimeConfig,
 	}
 
-	mainRouter.POST("/authorize", controller.authorize)
-	mainRouter.GET("/authorize", controller.authorize)
+	i.MainRouter.POST("/authorize", controller.authorize)
+	i.MainRouter.GET("/authorize", controller.authorize)
 
-	oidcGroup := router.Group("/oidc")
+	oidcGroup := i.RouterGroup.Group("/oidc")
 	oidcGroup.POST("/authorize-complete", controller.authorizeComplete)
 	oidcGroup.POST("/token", controller.Token)
 	oidcGroup.GET("/userinfo", controller.Userinfo)

internal/controller/proxy_controller.go

@@ -13,6 +13,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/service"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/go-querystring/query"
@@ -53,29 +54,33 @@ type ProxyContext struct {
 
 type ProxyController struct {
 	log          *logger.Logger
-	runtime      model.RuntimeConfig
+	runtime      *model.RuntimeConfig
 	acls         *service.AccessControlsService
 	auth         *service.AuthService
 	policyEngine *service.PolicyEngine
 }
 
-func NewProxyController(
-	log *logger.Logger,
-	runtime model.RuntimeConfig,
-	router *gin.RouterGroup,
-	acls *service.AccessControlsService,
-	auth *service.AuthService,
-	policyEngine *service.PolicyEngine,
-) *ProxyController {
+type ProxyControllerInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	RuntimeConfig *model.RuntimeConfig
+	RouterGroup   *gin.RouterGroup `name:"apiRouterGroup"`
+	ACLsService   *service.AccessControlsService
+	AuthService   *service.AuthService
+	PolicyEngine  *service.PolicyEngine
+}
+
+func NewProxyController(i ProxyControllerInput) *ProxyController {
 	controller := &ProxyController{
-		log:          log,
-		runtime:      runtime,
-		acls:         acls,
-		auth:         auth,
-		policyEngine: policyEngine,
+		log:          i.Log,
+		runtime:      i.RuntimeConfig,
+		acls:         i.ACLsService,
+		auth:         i.AuthService,
+		policyEngine: i.PolicyEngine,
 	}
 
-	proxyGroup := router.Group("/auth")
+	proxyGroup := i.RouterGroup.Group("/auth")
 	proxyGroup.Any("/:proxy", controller.proxyHandler)
 
 	return controller

internal/controller/resources_controller.go

@@ -5,25 +5,30 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/tinyauthapp/tinyauth/internal/model"
+	"go.uber.org/dig"
 )
 
 type ResourcesController struct {
-	config     model.Config
+	config     *model.Config
 	fileServer http.Handler
 }
 
-func NewResourcesController(
-	config model.Config,
-	router *gin.RouterGroup,
-) *ResourcesController {
-	fileServer := http.StripPrefix("/resources", http.FileServer(http.Dir(config.Resources.Path)))
+type ResourcesControllerInput struct {
+	dig.In
+
+	RouterGroup *gin.RouterGroup `name:"mainRouterGroup"`
+	Config      *model.Config
+}
+
+func NewResourcesController(i ResourcesControllerInput) *ResourcesController {
+	fileServer := http.StripPrefix("/resources", http.FileServer(http.Dir(i.Config.Resources.Path)))
 
 	controller := &ResourcesController{
-		config:     config,
+		config:     i.Config,
 		fileServer: fileServer,
 	}
 
-	router.GET("/resources/*resource", controller.resourcesHandler)
+	i.RouterGroup.GET("/resources/*resource", controller.resourcesHandler)
 
 	return controller
 }

internal/controller/user_controller.go

@@ -11,6 +11,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/service"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 	"github.com/pquerna/otp/totp"
@@ -27,23 +28,27 @@ type TotpRequest struct {
 
 type UserController struct {
 	log     *logger.Logger
-	runtime model.RuntimeConfig
+	runtime *model.RuntimeConfig
 	auth    *service.AuthService
 }
 
-func NewUserController(
-	log *logger.Logger,
-	runtimeConfig model.RuntimeConfig,
-	router *gin.RouterGroup,
-	auth *service.AuthService,
-) *UserController {
+type UserControllerInput struct {
+	dig.In
+
+	Log           *logger.Logger
+	RuntimeConfig *model.RuntimeConfig
+	RouterGroup   *gin.RouterGroup `name:"apiRouterGroup"`
+	AuthService   *service.AuthService
+}
+
+func NewUserController(i UserControllerInput) *UserController {
 	controller := &UserController{
-		log:     log,
-		runtime: runtimeConfig,
-		auth:    auth,
+		log:     i.Log,
+		runtime: i.RuntimeConfig,
+		auth:    i.AuthService,
 	}
 
-	userGroup := router.Group("/user")
+	userGroup := i.RouterGroup.Group("/user")
 	userGroup.POST("/login", controller.loginHandler)
 	userGroup.POST("/logout", controller.logoutHandler)
 	userGroup.POST("/totp", controller.totpHandler)

internal/controller/well_known_controller.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/tinyauthapp/tinyauth/internal/service"
+	"go.uber.org/dig"
 )
 
 type OpenIDConnectConfiguration struct {
@@ -30,13 +31,20 @@ type WellKnownController struct {
 	oidc *service.OIDCService
 }
 
-func NewWellKnownController(oidc *service.OIDCService, router *gin.RouterGroup) *WellKnownController {
+type WellKnownControllerInput struct {
+	dig.In
+
+	OIDCService *service.OIDCService
+	RouterGroup *gin.RouterGroup `name:"apiRouterGroup"`
+}
+
+func NewWellKnownController(i WellKnownControllerInput) *WellKnownController {
 	controller := &WellKnownController{
-		oidc: oidc,
+		oidc: i.OIDCService,
 	}
 
-	router.GET("/.well-known/openid-configuration", controller.OpenIDConnectConfiguration)
-	router.GET("/.well-known/jwks.json", controller.JWKS)
+	i.RouterGroup.GET("/.well-known/openid-configuration", controller.OpenIDConnectConfiguration)
+	i.RouterGroup.GET("/.well-known/jwks.json", controller.JWKS)
 
 	return controller
 }

internal/middleware/context_middleware.go

@@ -11,6 +11,7 @@ import (
 	"github.com/tinyauthapp/tinyauth/internal/service"
 	"github.com/tinyauthapp/tinyauth/internal/utils"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 )
@@ -37,25 +38,29 @@ var (
 
 type ContextMiddleware struct {
 	log       *logger.Logger
-	runtime   model.RuntimeConfig
+	runtime   *model.RuntimeConfig
 	auth      *service.AuthService
 	broker    *service.OAuthBrokerService
 	tailscale *service.TailscaleService
 }
 
-func NewContextMiddleware(
-	log *logger.Logger,
-	runtime model.RuntimeConfig,
-	auth *service.AuthService,
-	broker *service.OAuthBrokerService,
-	tailscale *service.TailscaleService,
-) *ContextMiddleware {
+type ContextMiddlewareInput struct {
+	dig.In
+
+	Log              *logger.Logger
+	RuntimeConfig    *model.RuntimeConfig
+	AuthService      *service.AuthService
+	BrokerService    *service.OAuthBrokerService
+	TailscaleService *service.TailscaleService
+}
+
+func NewContextMiddleware(i ContextMiddlewareInput) *ContextMiddleware {
 	return &ContextMiddleware{
-		log:       log,
-		runtime:   runtime,
-		auth:      auth,
-		broker:    broker,
-		tailscale: tailscale,
+		log:       i.Log,
+		runtime:   i.RuntimeConfig,
+		auth:      i.AuthService,
+		broker:    i.BrokerService,
+		tailscale: i.TailscaleService,
 	}
 }
 

internal/middleware/ui_middleware.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/tinyauthapp/tinyauth/internal/assets"
+	"go.uber.org/dig"
 
 	"github.com/gin-gonic/gin"
 )
@@ -18,7 +19,12 @@ type UIMiddleware struct {
 	uiFileServer http.Handler
 }
 
-func NewUIMiddleware() (*UIMiddleware, error) {
+// for future use if we need to inject dependencies into the middleware
+type UIMiddlewareInput struct {
+	dig.In
+}
+
+func NewUIMiddleware(_ UIMiddlewareInput) (*UIMiddleware, error) {
 	m := &UIMiddleware{}
 
 	ui, err := fs.Sub(assets.FrontendAssets, "dist")

internal/middleware/zerolog_middleware.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/tinyauthapp/tinyauth/internal/utils/logger"
+	"go.uber.org/dig"
 )
 
 // See context middleware for explanation of why we have to do this
@@ -21,9 +22,15 @@ type ZerologMiddleware struct {
 	log *logger.Logger
 }
 
-func NewZerologMiddleware(log *logger.Logger) *ZerologMiddleware {
+type ZerologMiddlewareInput struct {
+	dig.In
+
+	Log *logger.Logger
+}
+
+func NewZerologMiddleware(i ZerologMiddlewareInput) *ZerologMiddleware {
 	return &ZerologMiddleware{
-		log: log,
+		log: i.Log,
 	}
 }