Improving all side of app

internal/controllogic/notify.go

@@ -0,0 +1,37 @@
+package controllogic
+
+import "strings"
+
+// Dialog is a user-facing notification or input request emitted by an
+// action.dialog node. It is delivered to connected clients whose identity
+// matches Users/Groups (both empty = everyone). For an "input" dialog the
+// client's response is written back to Target (a "ds:name" reference, e.g.
+// "srv:approved") so control logic can read it on a later activation.
+type Dialog struct {
+	ID      string   `json:"id"`
+	Kind    string   `json:"kind"` // "info" | "error" | "input"
+	Title   string   `json:"title"`
+	Message string   `json:"message"`
+	Target  string   `json:"target,omitempty"`
+	Users   []string `json:"users,omitempty"`
+	Groups  []string `json:"groups,omitempty"`
+}
+
+// Notifier delivers control-logic dialogs to connected clients. The server
+// implements it; the engine calls Notify when an action.dialog node runs.
+// Notify must not block (the hub fans out without waiting on slow clients).
+type Notifier interface {
+	Notify(Dialog)
+}
+
+// splitCSV parses a comma-separated user/group filter into trimmed,
+// non-empty tokens. An empty string yields a nil slice (no filter).
+func splitCSV(s string) []string {
+	var out []string
+	for _, p := range strings.Split(s, ",") {
+		if t := strings.TrimSpace(p); t != "" {
+			out = append(out, t)
+		}
+	}
+	return out
+}