Add Kivy Payment Screen

src/bitmessagekivy/baseclass/payment.py

@@ -0,0 +1,66 @@
+# pylint: disable=import-error, no-name-in-module, too-few-public-methods, too-many-ancestors
+
+'''
+    Payment/subscription frontend
+'''
+
+from kivy.uix.boxlayout import BoxLayout
+from kivy.uix.screenmanager import Screen
+from kivy.app import App
+
+from kivymd.uix.behaviors.elevation import RectangularElevationBehavior
+from kivymd.uix.label import MDLabel
+from kivymd.uix.list import (
+    IRightBodyTouch,
+    OneLineAvatarIconListItem
+)
+
+from bitmessagekivy.baseclass.common import toast, kivy_state_variables
+
+
+class Payment(Screen):
+    """Payment Screen class for kivy Ui"""
+
+    def __init__(self, *args, **kwargs):
+        """Instantiate kivy state variable"""
+        super(Payment, self).__init__(*args, **kwargs)
+        self.kivy_state = kivy_state_variables()
+
+    # TODO: get_free_credits() is not used anywhere, will be used later for Payment/subscription.
+    def get_free_credits(self, instance):  # pylint: disable=unused-argument
+        """Get the available credits"""
+        # pylint: disable=no-self-use
+        self.kivy_state.available_credit = 0
+        existing_credits = 0
+        if existing_credits > 0:
+            toast(
+                'We already have added free credit'
+                ' for the subscription to your account!')
+        else:
+            toast('Credit added to your account!')
+            # TODO: There is no sc18 screen id is available,
+            # need to create sc18 for Credits screen inside main.kv
+            App.get_running_app().root.ids.sc18.ids.cred.text = '{0}'.format(
+                self.kivy_state.available_credit)
+
+
+class Category(BoxLayout, RectangularElevationBehavior):
+    """Category class for kivy Ui"""
+    elevation_normal = .01
+
+
+class ProductLayout(BoxLayout, RectangularElevationBehavior):
+    """ProductLayout class for kivy Ui"""
+    elevation_normal = .01
+
+
+class PaymentMethodLayout(BoxLayout):
+    """PaymentMethodLayout class for kivy Ui"""
+
+
+class ListItemWithLabel(OneLineAvatarIconListItem):
+    """ListItemWithLabel class for kivy Ui"""
+
+
+class RightLabel(IRightBodyTouch, MDLabel):
+    """RightLabel class for kivy Ui"""