gui: added logic to extract hardware device selection

lib/gui/gui.py

@@ -4,6 +4,7 @@ import sys
 import os
 import logging
 import datetime
+import re
 
 from PyQt5 import QtCore, QtGui, QtWidgets, uic
 
@@ -35,11 +36,8 @@ class SuGui(QtWidgets.QMainWindow):
         """
         Start button action in main window.
         """
-        if len(self.lineEdit_dump_file.text()) == 0:
-            QtWidgets.QMessageBox.about(self, "Dumpfile path missing…", \
-                                              "Please insert dump file path. ")
-        else:
-            pass
+        if self._check_dependencies_before_start_capture():
+            print self._extract_selected_hardware_device()
 
     def stop_button(self):
         """
@@ -60,8 +58,8 @@ class SuGui(QtWidgets.QMainWindow):
         """
         self.comboBox_hardware.clear()
         for device in Hardware().get_connected_supported_devices():
-            text = device['id'] + ": " + device['name']
-            self.comboBox_hardware.insertItem(0, self.tr(text))
+            text = device['name'] + " (" + device['id'] + ")"
+            self.comboBox_hardware.addItem(self.tr(text))
 
     def _get_default_dump_file_path(self):
         """
@@ -75,3 +73,46 @@ class SuGui(QtWidgets.QMainWindow):
         path = os.path.expanduser("~") + "/su/dump_file-" + dt + ".iq"
 
         return path
+
+    def _extract_selected_hardware_device(self):
+        """
+        Extract device key from combo box.
+        """
+        device_id = re.search(r"\w{4}:\w{4}", self.comboBox_hardware. \
+                                                currentText()).group()
+
+        device_key = ''
+        for key, value in Hardware().SUPPORTED_HARDWARE.items():
+            if value == device_id:
+                device_key = key
+
+        return device_key
+
+    def _check_dependencies_before_start_capture(self):
+        """
+        Private method to check needed dependencies before starting capturing
+        data. The following states needs to be passed:
+            1. A dump file path need to be befined
+            2. Supported RF hardware need to be connected
+            3. RF hardware need to be selected
+
+        It returns True or False.
+        """
+        if len(self.lineEdit_dump_file.text()) == 0:
+            QtWidgets.QMessageBox.about(self, "Dumpfile path missing…", \
+                                              "Please add dump file path.")
+            return False
+        elif len(Hardware().get_connected_supported_devices()) == 0:
+            QtWidgets.QMessageBox.about(self, "No supported RF hardware "\
+                                              "connected…", \
+                                              "Please connect RF hardware.")
+            self.refresh_hw_button()
+            return False
+        elif len(self.comboBox_hardware.currentText()) == 0:
+            QtWidgets.QMessageBox.about(self, "No supported RF hardware "\
+                                              "selected…", \
+                                              "Select RF hardware.")
+            self.refresh_hw_button()
+            return False
+        else:
+            return True