Adds proxy host vars

backend/internal/validator/hosts.go

@@ -6,6 +6,7 @@ import (
 	"npm/internal/entity/certificate"
 	"npm/internal/entity/host"
 	"npm/internal/entity/nginxtemplate"
+	"npm/internal/entity/upstream"
 )
 
 // ValidateHost will check if associated objects exist and other checks
@@ -20,6 +21,21 @@ func ValidateHost(h host.Model) error {
 		}
 	}
 
+	if h.UpstreamID > 0 {
+		// Check upstream exists
+		if _, uErr := upstream.GetByID(h.UpstreamID); uErr != nil {
+			return fmt.Errorf("Upstream #%d does not exist", h.UpstreamID)
+		}
+	}
+
+	// Ensure either UpstreamID is set or appropriate proxy host params are set
+	if h.UpstreamID > 0 && (h.ProxyHost != "" || h.ProxyPort > 0) {
+		return fmt.Errorf("Proxy Host or Port cannot be set when using an Upstream")
+	}
+	if h.UpstreamID == 0 && (h.ProxyHost == "" || h.ProxyPort < 1) {
+		return fmt.Errorf("Proxy Host and Port must be specified, unless using an Upstream")
+	}
+
 	// Check the nginx template exists and has the same type.
 	nginxTemplate, tErr := nginxtemplate.GetByID(h.NginxTemplateID)
 	if tErr != nil {