🏗️ Created site HTTP delivery

internal/site/delivery/http/site_http.go

@@ -0,0 +1,54 @@
+package http
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"golang.org/x/text/language"
+
+	"source.toby3d.me/toby3d/home/internal/common"
+	"source.toby3d.me/toby3d/home/internal/domain"
+	"source.toby3d.me/toby3d/home/internal/site"
+)
+
+type Handler struct {
+	sites site.UseCase
+}
+
+func NewHandler(sites site.UseCase) *Handler {
+	return &Handler{sites: sites}
+}
+
+func (h *Handler) Handle(ctx context.Context, head string) (*domain.Site, http.Handler, error) {
+	lang := domain.NewLanguage(head)
+
+	site, err := h.sites.Do(ctx, lang)
+	if err != nil {
+		return nil, nil, fmt.Errorf("cannot handle site: %w", err)
+	}
+
+	if !site.IsMultiLingual() || head != "" {
+		return site, nil, nil
+	}
+
+	supported := make([]language.Tag, len(site.Languages))
+	for i := range site.Languages {
+		supported[i] = language.Make(site.Languages[i].Lang())
+	}
+
+	if site.DefaultLanguage != domain.LanguageUnd {
+		supported = append([]language.Tag{language.Make(site.DefaultLanguage.Code())}, supported...)
+	}
+
+	return site, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		requested, _, _ := language.ParseAcceptLanguage(r.Header.Get(common.HeaderAcceptLanguage))
+		if len(requested) == 0 {
+			requested = append(requested, language.English)
+		}
+
+		matched, _, _ := language.NewMatcher(supported).Match(requested...)
+
+		http.Redirect(w, r, "/"+domain.NewLanguage(matched.String()).Lang()+"/", http.StatusSeeOther)
+	}), nil
+}