🏗️ Created theme HTTP delivery

internal/theme/delivery/http/theme_http.go

@@ -0,0 +1,49 @@
+package http
+
+import (
+	"net/http"
+	"strings"
+
+	"source.toby3d.me/toby3d/home/internal/common"
+	"source.toby3d.me/toby3d/home/internal/domain"
+	"source.toby3d.me/toby3d/home/internal/theme"
+)
+
+type Handler struct {
+	themes theme.UseCase
+}
+
+func NewHandler(themes theme.UseCase) *Handler {
+	return &Handler{
+		themes: themes,
+	}
+}
+
+func (h *Handler) Handle(s *domain.Site, e *domain.Entry) http.HandlerFunc {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// TODO(toby3d): handle home page.
+		// TODO(toby3d): handle sections.
+		// TODO(toby3d): handle errors.
+
+		// NOTE(toby3d): wrap founded entry into theme template and
+		// answer to client.
+		contentLanguage := make([]string, len(e.Translations))
+		for i := range e.Translations {
+			contentLanguage[i] = e.Translations[i].Language.Code()
+		}
+
+		w.Header().Set(common.HeaderContentLanguage, strings.Join(contentLanguage, ", "))
+
+		template, err := h.themes.Do(r.Context(), s, e)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+
+			return
+		}
+
+		w.Header().Set(common.HeaderContentType, common.MIMETextHTMLCharsetUTF8)
+		if err = template(w); err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+		}
+	})
+}