Revert observable refactorings

components/ratgdo/observable.h

@@ -7,46 +7,19 @@ namespace esphome {
 namespace ratgdo {
 
     template <typename T>
-    class distinct_observable;
-
-
-
-    template <typename T>
-    class observable_base {
+    class observable {
     public:
-        template <typename Observer>
-        void subscribe(Observer&& observer)
+        observable(const T& value)
+            : value_(value)
         {
-            this->observers_.push_back(std::forward<Observer>(observer));
         }
 
-        void notify(T value) const
-        {
-            for (const auto& observer : this->observers_) {
-                observer(value);
-            }
-        }
-
-        distinct_observable<T> distinct()
-        {
-            return std::make_shared(this);
-        }
-
-    private:
-        std::vector<std::function<void(T)>> observers_;
-    };
-
-    template <typename T>
-    class observable : public observable_base<T> {
-    public:
-        observable(const T& value) : value_(value) {}
-
         template <typename U>
         observable& operator=(U value)
         {
             if (value != this->value_) {
                 this->value_ = value;
-                this->notify(value);
+                this->notify();
             }
             return *this;
         }
@@ -54,27 +27,22 @@ namespace ratgdo {
         T const* operator&() const { return &this->value_; }
         T const& operator*() const { return this->value_; }
 
-    private:
-        T value_;
-    };
+        template <typename Observer>
+        void subscribe(Observer&& observer)
+        {
+            this->observers_.push_back(std::forward<Observer>(observer));
+        }
 
-
-
-    template <typename T>
-    class distinct_observable : public observable<T> {
-    public:
-        distinct_observable(std::shared_ptr<observable<T>> inner) : inner_(inner) {
-            inner.subscribe([=] (T value) {
-                if (value != this->value_) {
-                    this->value_ = value;
-                    this->notify(value);
-                }
-            });
+        void notify() const
+        {
+            for (const auto& observer : this->observers_) {
+                observer(this->value_);
+            }
         }
 
     private:
-        std::shared_ptr<observable<T>> inner_;
         T value_;
+        std::vector<std::function<void(T)>> observers_;
     };
 
 } // namespace ratgdo