the rest

internal/handlers/helpers.go

@@ -0,0 +1,26 @@
+package handlers
+
+import (
+	"database/sql"
+	"encoding/json"
+	"net/http"
+)
+
+func sqlNullString(s string) sql.NullString {
+	if s == "" {
+		return sql.NullString{}
+	}
+	return sql.NullString{String: s, Valid: true}
+}
+
+func sqlNullUUID(s string) sql.NullString {
+	if s == "" {
+		return sql.NullString{}
+	}
+	return sql.NullString{String: s, Valid: true}
+}
+
+func writeJSON(w http.ResponseWriter, v interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(v)
+}