Rename config vars. Add widget holder template and endpoint to serve it. Add dockerfile

internal/api/module.go

@@ -15,6 +15,7 @@ import (
 	"payouts/internal/api/payout"
 	"payouts/internal/api/user"
 	"payouts/internal/api/version"
+	"payouts/internal/api/widget"
 	appConfig "payouts/internal/config"
 	"payouts/internal/service/monitoring"
 )
@@ -25,6 +26,7 @@ var Module = fx.Options(
 	health.Module,
 	payout.Module,
 	version.Module,
+	widget.Module,
 	monitoring.Module,
 
 	fx.Invoke(RegisterRoutes),
@@ -41,8 +43,9 @@ type Params struct {
 
 	PayoutHandler payout.Handler
 	UserHandler   user.Handler
-	Version       version.Handler
 	HealthHandler health.Handler
+	Version       version.Handler
+	Widget        widget.Handler
 
 	Metrics monitoring.Metrics
 }
@@ -77,6 +80,9 @@ func RegisterRoutes(p Params, lc fx.Lifecycle) {
 	payoutRouter.HandleFunc(payout.CreateRoute, p.PayoutHandler.PayoutCreate).Methods(http.MethodPost)
 	payoutRouter.HandleFunc(payout.CallbackRoute, p.PayoutHandler.PayoutCallback).Methods(http.MethodPost)
 
+	// Widget endpoint
+	router.HandleFunc(widget.WidgetPage, p.Widget.WidgetHandler).Methods(http.MethodGet)
+
 	// collect api metrics
 	apiRouter.Use(p.Metrics.GetMiddleware())
 

internal/api/payout/payout_handler.go

@@ -122,7 +122,7 @@ func (p *payoutHandler) GetSbpBanks(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// PaymentCreate implements [Handler].
+// PayoutCreate implements [Handler].
 func (p *payoutHandler) PayoutCreate(w http.ResponseWriter, r *http.Request) {
 	defer r.Body.Close()
 
@@ -203,7 +203,7 @@ func (p *payoutHandler) delayedPayoutUpdate(ctx context.Context, payoutData *yoo
 	}
 }
 
-// PaymentCallback implements [Handler].
+// PayoutCallback implements [Handler].
 func (p *payoutHandler) PayoutCallback(w http.ResponseWriter, r *http.Request) {
 	// todo: check also the X-real-ip and/or X-Forwarded-For
 	if p.yookassaConf.CheckAllowedCallbackAddress && !p.checkAllowedIpCallback(r.RemoteAddr) {

internal/api/widget/module.go

@@ -0,0 +1,9 @@
+package widget
+
+import (
+	"go.uber.org/fx"
+)
+
+var Module = fx.Options(
+	fx.Provide(NewWidgetHandler),
+)

internal/api/widget/widget_handler.go

@@ -0,0 +1,55 @@
+package widget
+
+import (
+	"html/template"
+	"net/http"
+
+	"go.uber.org/fx"
+
+	"payouts/internal/service/yookassa"
+	yookassaConf "payouts/internal/service/yookassa/config"
+	"payouts/internal/templates"
+)
+
+const WidgetPage = "/payout/widget"
+
+type Handler interface {
+	WidgetHandler(http.ResponseWriter, *http.Request)
+}
+
+type widgetHandler struct {
+	template *template.Template
+	config   yookassaConf.YooKassa
+}
+
+// Params represents the module input params
+type Params struct {
+	fx.In
+
+	YookassaService yookassa.Service
+}
+
+func NewWidgetHandler(p Params) (Handler, error) {
+	return &widgetHandler{
+		template: templates.Templates,
+		config:   p.YookassaService.GetConfig(),
+	}, nil
+}
+
+// WidgetHandler renders the payouts widget page
+func (h *widgetHandler) WidgetHandler(w http.ResponseWriter, r *http.Request) {
+	data := struct {
+		ApiPayoutKey string
+		WidgetVersion string
+	}{
+		ApiPayoutKey: h.config.ApiPayoutKey,
+		WidgetVersion: h.config.WidgetVersion,
+	}
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	err := h.template.ExecuteTemplate(w, "payouts-widget.html", data)
+	if err != nil {
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+}