From d38339ab9f7172b63e60befd53179d16d9a96182 Mon Sep 17 00:00:00 2001
From: Adelin Dobre <adelin.dobre@rinftech.com>
Date: Mon, 23 Jul 2018 17:12:40 +0300
Subject: [PATCH] Button: Add string based constructor

Signed-off-by: Adelin Dobre <adelin.dobre@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
---
 src/button/button.cxx | 17 +++++++++++++++++
 src/button/button.hpp |  8 ++++++++
 2 files changed, 25 insertions(+)

diff --git a/src/button/button.cxx b/src/button/button.cxx
index 36cbb1fd..344d288b 100644
--- a/src/button/button.cxx
+++ b/src/button/button.cxx
@@ -44,6 +44,23 @@ Button::Button(unsigned int pin)
     m_name = "Button Sensor";
 }
 
+Button::Button(std::string initStr) : mraaIo(initStr)
+{
+    mraa_io_descriptor* descs = mraaIo.getMraaDescriptors();
+    if(!descs->gpios) {
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_gpio_init() failed, invalid pin?");
+    } else {
+      if( !(m_gpio = descs->gpios[0]) ) {
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_gpio_init() failed, invalid pin?");
+      }
+    }
+
+    mraa_gpio_dir(m_gpio, MRAA_GPIO_IN);
+    m_name = "Button Sensor";
+}
+
 Button::~Button()
 {
     mraa_gpio_close(m_gpio);
diff --git a/src/button/button.hpp b/src/button/button.hpp
index 81403a03..0991df33 100644
--- a/src/button/button.hpp
+++ b/src/button/button.hpp
@@ -27,6 +27,7 @@
 #pragma once
 
 #include <string>
+#include <mraa/initio.hpp>
 #include <mraa/gpio.hpp>
 #include <interfaces/iButton.hpp>
 
@@ -63,6 +64,12 @@ class Button : virtual public iButton {
          * @param pin Pin to use
          */
         Button(unsigned int pin);
+        /**
+         * Instantiates Button/Switch Library based on a given string.
+         *
+         * @param initStr string containing specific information for Button initialization.
+         */
+        Button(std::string initStr);
         /**
          * button destructor
          */
@@ -107,5 +114,6 @@ class Button : virtual public iButton {
         bool m_isrInstalled;
         std::string m_name;
         mraa_gpio_context m_gpio;
+        mraa::MraaIo mraaIo;
 };
 }