Add eviltwin args. Add "Dependency" subclass

wifite/tools/dependency.py

@@ -0,0 +1,30 @@
+from ..util.process import Process
+from ..util.color import Color
+
+class Dependency(object):
+    required_attr_names = ['dependency_name', 'dependency_url', 'dependency_required']
+
+    # https://stackoverflow.com/a/49024227
+    def __init_subclass__(cls):
+        for attr_name in cls.required_attr_names:
+            if not attr_name in cls.__dict__:
+                raise NotImplementedError(
+                    "Attribute '{}' has not been overriden in class '{}'" \
+                    .format(attr_name, cls.__name__)
+                )
+
+
+    @classmethod
+    def fails_dependency_check(cls):
+        if Process.exists(cls.dependency_name):
+            return False
+
+        if cls.dependency_required:
+            Color.pl('{!} {R}error: required app {O}%s{R} was not found' % cls.dependency_name)
+            Color.pl('     {W}install @ {C}%s{W}' % cls.dependency_url)
+            return True
+
+        else:
+            Color.pl('{!} {O}warning: recommended app {R}%s{O} was not found' % cls.dependency_name)
+            Color.pl('     {W}install @ {C}%s{W}' % cls.dependency_url)
+            return False