major change of websocket dbmHandler structure

dbm/publish.go

@@ -0,0 +1,34 @@
+package dbm
+
+import (
+	"context"
+
+	"github.com/coder/websocket/wsjson"
+	"github.com/zuadi/tecamino-dbm/models"
+)
+
+func (d *DBMHandler) Publish(ctx context.Context, eventType, path string, value any) error {
+	d.RLock()
+	defer d.RUnlock()
+
+	for _, dp := range d.DB.QueryDatapoints(1, path) {
+		for id, pub := range dp.Subscribtions {
+			if client, ok := d.Clients[id]; !ok {
+				delete(dp.Subscribtions, id)
+			} else {
+				if pub.OnChange {
+					err := wsjson.Write(ctx, client.Conn, models.JsonResponse{
+						Event: OnChange,
+						Path:  dp.Path,
+						Value: value,
+					})
+					if err != nil {
+						d.Log.Error("publish.Publish", err.Error())
+						return err
+					}
+				}
+			}
+		}
+	}
+	return nil
+}