Add support for HS300 power strip (#137)

* discover runs, prints on since of device 0

* added preliminary support for HS300

* forgot to add smartdevice to commit

* added index to CLI

* clean up dirty code

* added fake sysinfo_hs300

* changed device alias to match MAC

* #131 Move _id_to_index into smartstrip so everyone can pass index

* Update pyHS100/discover.py

Co-Authored-By: jimboca <jimboca3@gmail.com>

* refactoring to deduplicate code between smarplug and smartstrip

* fixing CI failures for devices without children

* incorporating feedback from pull request.

* fixing hound violation

* changed internal store from list of dicts to dict

* changed other methods to dictionary store as well

* removed unused optional type from imports

* changed plugs to Dict, remove redundant sys_info calls

* added more functionality for smart strip, added smart strip tests

* updated FakeTransportProtocol for devices with children

* corrected hound violations

* add click-datetime

pyHS100/smartplug.py

@@ -33,9 +33,10 @@ class SmartPlug(SmartDevice):
 
     def __init__(self,
                  host: str,
-                 protocol: 'TPLinkSmartHomeProtocol' = None) -> None:
-        SmartDevice.__init__(self, host, protocol)
-        self.emeter_type = "emeter"
+                 protocol: 'TPLinkSmartHomeProtocol' = None,
+                 context: str = None) -> None:
+        SmartDevice.__init__(self, host, protocol, context)
+        self._type = "emeter"
 
     @property
     def state(self) -> str:
@@ -126,7 +127,6 @@ class SmartPlug(SmartDevice):
 
         :return: True if switch supports brightness changes, False otherwise
         :rtype: bool
-
         """
         return "brightness" in self.sys_info
 
@@ -193,8 +193,15 @@ class SmartPlug(SmartDevice):
         :return: datetime for on since
         :rtype: datetime
         """
-        return datetime.datetime.now() - \
-            datetime.timedelta(seconds=self.sys_info["on_time"])
+        if self.context:
+            for plug in self.sys_info["children"]:
+                if plug["id"] == self.context:
+                    on_time = plug["on_time"]
+                    break
+        else:
+            on_time = self.sys_info["on_time"]
+
+        return datetime.datetime.now() - datetime.timedelta(seconds=on_time)
 
     @property
     def state_information(self) -> Dict[str, Any]: