work towards decoupling api from router

config.go

@@ -0,0 +1,85 @@
+package showbridge
+
+import (
+	"errors"
+	"reflect"
+
+	"github.com/jwetzell/showbridge-go/internal/common"
+	"github.com/jwetzell/showbridge-go/internal/config"
+	"github.com/jwetzell/showbridge-go/internal/route"
+)
+
+func (r *Router) GetRunningConfig() config.Config {
+	r.runningConfigMu.RLock()
+	defer r.runningConfigMu.RUnlock()
+	return r.runningConfig
+}
+
+func (r *Router) UpdateConfig(newConfig config.Config, triggerChangeChan bool) (error, []config.ModuleError, []config.RouteError) {
+	if !r.runningConfigMu.TryLock() {
+		return errors.New("config update in progress"), nil, nil
+	}
+	defer r.runningConfigMu.Unlock()
+	oldConfig := r.runningConfig
+	r.logger.Debug("received config update", "oldConfig", oldConfig, "newConfig", newConfig)
+
+	if !reflect.DeepEqual(oldConfig.Api, newConfig.Api) {
+		r.logger.Info("applying new API config")
+		r.apiServer.Stop()
+		r.apiServer.Start(newConfig.Api)
+		r.runningConfig.Api = newConfig.Api
+	}
+
+	// TODO(jwetzell): handle config update errors better
+	for _, moduleInstance := range r.ModuleInstances {
+		moduleInstance.Stop()
+	}
+	r.logger.Debug("waiting for modules to exit")
+	r.moduleWait.Wait()
+
+	r.ModuleInstances = make(map[string]common.Module)
+	r.RouteInstances = []*route.Route{}
+
+	var moduleErrors []config.ModuleError
+
+	for moduleIndex, moduleDecl := range newConfig.Modules {
+
+		err := r.addModule(moduleDecl)
+		if err != nil {
+			if moduleErrors == nil {
+				moduleErrors = []config.ModuleError{}
+			}
+			moduleErrors = append(moduleErrors, config.ModuleError{
+				Index:  moduleIndex,
+				Config: moduleDecl,
+				Error:  err.Error(),
+			})
+			continue
+		}
+
+	}
+
+	var routeErrors []config.RouteError
+	for routeIndex, routeDecl := range newConfig.Routes {
+		err := r.addRoute(routeDecl)
+		if err != nil {
+			if routeErrors == nil {
+				routeErrors = []config.RouteError{}
+			}
+			routeErrors = append(routeErrors, config.RouteError{
+				Index:  routeIndex,
+				Config: routeDecl,
+				Error:  err.Error(),
+			})
+			continue
+		}
+	}
+	r.runningConfig = newConfig
+	r.startModules()
+
+	if triggerChangeChan {
+		r.ConfigChange <- newConfig
+	}
+
+	return nil, moduleErrors, routeErrors
+}