add button controller

code/ButtonController.cpp

@@ -0,0 +1,40 @@
+#include <Arduino.h>
+
+class ButtonController {
+
+    private:
+        int pin;
+        int new_value;
+        int old_value = HIGH;
+
+    public:
+        ButtonController(int pin){
+            this->set_pin(pin);
+        };
+
+        void configure_pins(){
+            pinMode(this->pin, INPUT_PULLUP);
+        }
+
+        void set_pin(int pin){
+            this->pin = pin;
+        }
+
+        void read(){
+            this->new_value = digitalRead(this->pin);
+        }
+
+        bool value_changed(){
+            return (this->new_value != this->old_value);
+        }
+
+        bool is_pressed(){
+            if(this->value_changed()){
+                bool is_pressed = (this->new_value == LOW);
+                this->old_value = this->new_value;
+                return is_pressed;
+            }
+            return this->new_value == LOW;
+        }
+
+};