Changed: DB Params

templ/examples/counter/handlers/default.go

@@ -0,0 +1,81 @@
+package handlers
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/a-h/templ/examples/counter/components"
+	"github.com/a-h/templ/examples/counter/services"
+	"github.com/a-h/templ/examples/counter/session"
+	"golang.org/x/exp/slog"
+)
+
+type CountService interface {
+	Increment(ctx context.Context, it services.IncrementType, sessionID string) (counts services.Counts, err error)
+	Get(ctx context.Context, sessionID string) (counts services.Counts, err error)
+}
+
+func New(log *slog.Logger, cs CountService) *DefaultHandler {
+	return &DefaultHandler{
+		Log:          log,
+		CountService: cs,
+	}
+}
+
+type DefaultHandler struct {
+	Log          *slog.Logger
+	CountService CountService
+}
+
+func (h *DefaultHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if r.Method == http.MethodPost {
+		h.Post(w, r)
+		return
+	}
+	h.Get(w, r)
+}
+
+func (h *DefaultHandler) Get(w http.ResponseWriter, r *http.Request) {
+	var props ViewProps
+	var err error
+	props.Counts, err = h.CountService.Get(r.Context(), session.ID(r))
+	if err != nil {
+		h.Log.Error("failed to get counts", slog.Any("error", err))
+		http.Error(w, "failed to get counts", http.StatusInternalServerError)
+		return
+	}
+	h.View(w, r, props)
+}
+
+func (h *DefaultHandler) Post(w http.ResponseWriter, r *http.Request) {
+	r.ParseForm()
+
+	// Decide the action to take based on the button that was pressed.
+	var it services.IncrementType
+	if r.Form.Has("global") {
+		it = services.IncrementTypeGlobal
+	}
+	if r.Form.Has("session") {
+		it = services.IncrementTypeSession
+	}
+
+	counts, err := h.CountService.Increment(r.Context(), it, session.ID(r))
+	if err != nil {
+		h.Log.Error("failed to increment", slog.Any("error", err))
+		http.Error(w, "failed to increment", http.StatusInternalServerError)
+		return
+	}
+
+	// Display the view.
+	h.View(w, r, ViewProps{
+		Counts: counts,
+	})
+}
+
+type ViewProps struct {
+	Counts services.Counts
+}
+
+func (h *DefaultHandler) View(w http.ResponseWriter, r *http.Request, props ViewProps) {
+	components.Page(props.Counts.Global, props.Counts.Session).Render(r.Context(), w)
+}