Move the locales parameter inside Company struct.

I realized that locales should be company-dependent: we could have two
companies that show pages in a different subset of the application
locales.  It is not the case now, because despite being a “multicompany
application”, it is intended for a single customer, but still makes
sense to include it in Company, even if the subset is the same set as
the application’s.

pkg/app/app.go

@@ -76,7 +76,7 @@ func (h *App) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			panic(err)
 		}
 
-		company, err := auth.CompanyByHost(r.Context(), conn, r.Host)
+		company, err := auth.CompanyByHost(r.Context(), conn, r.Host, h.locales)
 		if database.ErrorIsNotFound(err) {
 			http.NotFound(w, r)
 			return
@@ -116,7 +116,7 @@ func (h *App) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 				return
 			}
 			user.Locale = urlLocale
-			h.public.Handler(user, company, h.locales, conn).ServeHTTP(w, r)
+			h.public.Handler(user, company, conn).ServeHTTP(w, r)
 		}
 	}
 }

pkg/app/public.go

@@ -12,7 +12,6 @@ import (
 	"dev.tandem.ws/tandem/camper/pkg/auth"
 	"dev.tandem.ws/tandem/camper/pkg/database"
 	httplib "dev.tandem.ws/tandem/camper/pkg/http"
-	"dev.tandem.ws/tandem/camper/pkg/locale"
 	"dev.tandem.ws/tandem/camper/pkg/template"
 )
 
@@ -22,14 +21,14 @@ func newPublicHandler() *publicHandler {
 	return &publicHandler{}
 }
 
-func (h *publicHandler) Handler(user *auth.User, company *auth.Company, locales locale.Locales, conn *database.Conn) http.Handler {
+func (h *publicHandler) Handler(user *auth.User, company *auth.Company, conn *database.Conn) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		var head string
 		head, r.URL.Path = httplib.ShiftPath(r.URL.Path)
 		switch head {
 		case "":
 			page := newHomePage()
-			page.MustRender(w, r, user, company, locales)
+			page.MustRender(w, r, user, company)
 		default:
 			http.NotFound(w, r)
 		}
@@ -55,11 +54,11 @@ func newPublicPage(template string) *PublicPage {
 	}
 }
 
-func (p *PublicPage) MustRender(w http.ResponseWriter, r *http.Request, user *auth.User, company *auth.Company, locales locale.Locales) {
+func (p *PublicPage) MustRender(w http.ResponseWriter, r *http.Request, user *auth.User, company *auth.Company) {
 	schema := httplib.Protocol(r)
 	authority := httplib.Host(r)
 	_, path := httplib.ShiftPath(r.RequestURI)
-	for _, l := range locales {
+	for _, l := range company.Locales {
 		p.LocalizedAlternates = append(p.LocalizedAlternates, &LocalizedAlternate{
 			Lang:    l.Language.String(),
 			Endonym: l.Endonym,

pkg/auth/company.go

@@ -9,14 +9,18 @@ import (
 	"context"
 
 	"dev.tandem.ws/tandem/camper/pkg/database"
+	"dev.tandem.ws/tandem/camper/pkg/locale"
 )
 
 type Company struct {
-	ID int
+	ID      int
+	Locales locale.Locales
 }
 
-func CompanyByHost(ctx context.Context, conn *database.Conn, host string) (*Company, error) {
+func CompanyByHost(ctx context.Context, conn *database.Conn, host string, allLocales locale.Locales) (*Company, error) {
-	company := &Company{}
+	company := &Company{
+		Locales: allLocales,
+	}
 	if err := conn.QueryRow(ctx, `
 		select company_id
 		from company_host