feat: add dynamic hospital database registry

internal/http/middleware.go

@@ -1,10 +1,22 @@
 package http
 
 import (
+	"context"
+	"errors"
 	"net/http"
 	"strings"
+
+	"primaya-api/cpone-middleware/internal/databaseconfig"
+	"primaya-api/cpone-middleware/internal/repository"
 )
 
+type selectedRepositoryKey struct{}
+
+type DatabaseResolver interface {
+	DefaultCode() string
+	Resolve(ctx context.Context, code string) (repository.MySQLLayananRepository, error)
+}
+
 func BearerAuth(staticToken string, next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if bearerToken(r.Header.Get("Authorization")) != staticToken {
@@ -20,6 +32,39 @@ func BearerAuth(staticToken string, next http.Handler) http.Handler {
 	})
 }
 
+func SelectDatabase(resolver DatabaseResolver, next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		code := strings.TrimSpace(r.Header.Get("X-RS-Code"))
+		if code == "" {
+			code = strings.TrimSpace(r.URL.Query().Get("kode_rs"))
+		}
+		if code == "" {
+			code = resolver.DefaultCode()
+		}
+		code = databaseconfig.NormalizeRSCode(code)
+
+		repo, err := resolver.Resolve(r.Context(), code)
+		if err != nil {
+			if errors.Is(err, databaseconfig.ErrSettingNotFound) {
+				WriteJSON(w, http.StatusNotFound, Response{Success: false,
+					Message: "Setting database untuk kode RS " + code + " tidak ditemukan", Data: nil})
+				return
+			}
+			WriteJSON(w, http.StatusServiceUnavailable, Response{Success: false,
+				Message: "Database untuk kode RS " + code + " tidak dapat diakses", Data: nil})
+			return
+		}
+		w.Header().Set("X-RS-Code", code)
+		ctx := context.WithValue(r.Context(), selectedRepositoryKey{}, repo)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+func selectedRepository(ctx context.Context) (repository.MySQLLayananRepository, bool) {
+	repo, ok := ctx.Value(selectedRepositoryKey{}).(repository.MySQLLayananRepository)
+	return repo, ok
+}
+
 func bearerToken(header string) string {
 	const prefix = "Bearer "
 	if !strings.HasPrefix(header, prefix) {