swappableMux is now public and Append() now updates Server.Handler

Co-authored-by: Roberto Abdelkader Martínez Pérez <robertomartinezp@gmail.com>

internal/server/user/state.go

@@ -0,0 +1,64 @@
+package user
+
+import (
+	"errors"
+	"sync"
+
+	"github.com/BBVA/kapow/internal/server/model"
+	"github.com/BBVA/kapow/internal/server/user/mux"
+)
+
+type safeRouteList struct {
+	rs []model.Route
+	m  *sync.RWMutex
+}
+
+var Routes safeRouteList = New()
+
+func New() safeRouteList {
+	return safeRouteList{
+		rs: []model.Route{},
+		m:  &sync.RWMutex{},
+	}
+}
+
+func (srl *safeRouteList) Append(r model.Route) model.Route {
+	srl.m.Lock()
+	srl.rs = append(srl.rs, r)
+	l := len(srl.rs)
+	srl.m.Unlock()
+
+	Server.Handler.(*mux.SwappableMux).Update(srl.Snapshot())
+
+	return model.Route{Index: l - 1}
+}
+
+func (srl *safeRouteList) Snapshot() []model.Route {
+	srl.m.RLock()
+	defer srl.m.RUnlock()
+
+	rs := make([]model.Route, len(srl.rs))
+	copy(rs, srl.rs)
+	return rs
+}
+
+func (srl *safeRouteList) List() []model.Route {
+	rs := srl.Snapshot()
+	for i := 0; i < len(rs); i++ {
+		rs[i].Index = i
+	}
+	return rs
+}
+
+func (srl *safeRouteList) Delete(ID string) error {
+	srl.m.Lock()
+	defer srl.m.Unlock()
+
+	for i := 0; i < len(srl.rs); i++ {
+		if srl.rs[i].ID == ID {
+			srl.rs = append(srl.rs[:i], srl.rs[i+1:]...)
+			return nil
+		}
+	}
+	return errors.New("Route not found")
+}