Refactor provider switch methods in dao and tests

app/provider_details/switch_providers.py

@@ -0,0 +1,48 @@
+from flask import current_app
+
+
+def provider_is_already_primary_or_inactive(current_provider, new_provider, identifier):
+    if current_provider.identifier == identifier:
+        current_app.logger.warning('Provider {} is already activated'.format(current_provider.display_name))
+        return True
+
+    elif not new_provider.active:
+        current_app.logger.warning('Cancelling switch from {} to {} as {} is inactive'.format(
+            current_provider.identifier,
+            new_provider.identifier,
+            new_provider.identifier
+        ))
+        return True
+
+    return False
+
+
+def update_provider_priorities(current_provider, new_provider):
+    # Swap priority to change primary provider
+    if new_provider.priority > current_provider.priority:
+        new_provider.priority, current_provider.priority = current_provider.priority, new_provider.priority
+        _print_provider_switch_logs(current_provider, new_provider)
+        return [current_provider, new_provider]
+
+    # Incease other provider priority if equal
+    elif new_provider.priority == current_provider.priority:
+        current_provider.priority += 10
+        _print_provider_switch_logs(current_provider, new_provider)
+        return [current_provider]
+
+
+def _print_provider_switch_logs(current_provider, new_provider):
+    current_app.logger.warning('Switching provider from {} to {}'.format(
+        current_provider.identifier,
+        new_provider.identifier
+    ))
+
+    current_app.logger.warning('Provider {} now updated with priority of {}'.format(
+        current_provider.identifier,
+        current_provider.priority
+    ))
+
+    current_app.logger.warning('Provider {} now updated with priority of {}'.format(
+        new_provider.identifier,
+        new_provider.priority
+    ))