figured out how to get conn/ctx into users method calls - by passing a configured service object to their callback functions

entitylistener.go

@@ -0,0 +1,56 @@
+package gomeassistant
+
+type entityListener struct {
+	entityId     string
+	callback     entityListenerCallback
+	fromState    string
+	toState      string
+	betweenStart hourMinute
+	betweenEnd   hourMinute
+}
+
+type entityListenerCallback func(Service, Data)
+
+type Data struct{}
+
+func EntityListenerBuilder() elBuilder1 {
+	return elBuilder1{entityListener{}}
+}
+
+type elBuilder1 struct {
+	entityListener
+}
+
+func (b elBuilder1) EntityId(eid string) elBuilder2 {
+	b.entityListener.entityId = eid
+	return elBuilder2(b)
+}
+
+type elBuilder2 struct {
+	entityListener
+}
+
+func (b elBuilder2) Call(callback entityListenerCallback) elBuilder3 {
+	b.entityListener.callback = callback
+	return elBuilder3(b)
+}
+
+type elBuilder3 struct {
+	entityListener
+}
+
+func (b elBuilder3) OnlyBetween(start hourMinute, end hourMinute) elBuilder3 {
+	b.entityListener.betweenStart = start
+	b.entityListener.betweenEnd = end
+	return b
+}
+
+func (b elBuilder3) FromState(s string) elBuilder3 {
+	b.entityListener.fromState = s
+	return b
+}
+
+func (b elBuilder3) ToState(s string) elBuilder3 {
+	b.entityListener.toState = s
+	return b
+}