Add common methods for backend

src/backend/address_generator.py

@@ -0,0 +1,49 @@
+"""
+Common methods and functions for kivy and qt.
+"""
+
+import queues
+from bmconfigparser import config
+from defaults import (
+    networkDefaultProofOfWorkNonceTrialsPerByte,
+    networkDefaultPayloadLengthExtraBytes
+)
+
+
+class AddressGenerator(object):
+    """"Base class for address generation and validation"""
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def random_address_generation(
+        label, streamNumberForAddress=1, eighteenByteRipe=False,
+        nonceTrialsPerByte=networkDefaultProofOfWorkNonceTrialsPerByte,
+        payloadLengthExtraBytes=networkDefaultPayloadLengthExtraBytes
+    ):
+        """Start address generation and return whether validation was successful"""
+
+        labels = [config.get(obj, 'label')
+                  for obj in config.addresses()]
+        if label and label not in labels:
+            queues.addressGeneratorQueue.put((
+                'createRandomAddress', 4, streamNumberForAddress, label, 1,
+                "", eighteenByteRipe, nonceTrialsPerByte,
+                payloadLengthExtraBytes))
+            return True
+        return False
+
+    @staticmethod
+    def address_validation(instance, label):
+        """Checking address validation while creating"""
+        labels = [config.get(obj, 'label') for obj in config.addresses()]
+        if label in labels:
+            instance.error = True
+            instance.helper_text = 'it is already exist you'\
+                ' can try this Ex. ( {0}_1, {0}_2 )'.format(
+                    label)
+        elif label:
+            instance.error = False
+        else:
+            instance.error = True
+            instance.helper_text = 'This field is required'