Добавить executor/handlers/state.py

executor/handlers/state.py

@@ -0,0 +1,104 @@
+__author__ = 'RemiZOffAlex'
+__email__ = 'remizoffalex@mail.ru'
+
+from uuid import uuid4
+
+
+def closure_include(name):
+    def closure_filter(closure):
+        return closure['child']==name
+    return closure_filter
+
+
+def closure_exclude(name):
+    def closure_filter(closure):
+        return closure['child']!=name
+    return closure_filter
+
+
+def scope_addition(context, parent = None):
+    name = str(uuid4())
+    context.scopes[name] = {}
+    if parent:
+        context.closures.append({
+            'parent': parent,
+            'child': name
+        })
+    else:
+        context.closures.append({
+            'parent': context.current,
+            'child': name
+        })
+    return name
+
+# def scope_del(context, name):
+#     closures = []
+#     for item in context.closures:
+#         if item['child'] != name:
+#             closures.append(item)
+#     context.closures = closures
+#     del context.scopes[name]
+
+def scope_del(context, name):
+    if name in context.scopes:
+        context.closures = list(
+            filter(
+                closure_exclude,
+                context.closures
+            )
+        )
+        del context.scopes[name]
+        return
+    raise Exception('Область видимости {} не найдена'.format(name))
+
+def variable_addition(context, name, value = None):
+    current = context.scopes[context.current]
+    if name in current:
+        raise Exception('Double declaration of the variable %s' % name)
+    current[name] = value
+
+
+def variable_delete(context, name):
+    current = context.scopes[context.current]
+    if name in current:
+        del current[name]
+    raise Exception('Переменная {} не найдена'.format(name))
+
+
+def variable_exist(context, name):
+    current = context.scopes[context.current]
+    return name in current
+
+
+def variable_get(context, name):
+    scope = context.scopes[context.current]
+    if name in scope:
+        result = scope[name]
+        return result
+    stack = []
+    if context.current != 'root':
+        stack.append(context.current)
+    while len(stack) > 0:
+        scope_name = stack.pop()
+        closures = list(
+            filter(
+                closure_include(scope_name),
+                context.closures
+            )
+        )
+        for closure in closures:
+            stack.append(closure['parent'])
+        scope = context.scopes[scope_name]
+        if name in scope:
+            result = scope[name]
+            return result
+
+    raise Exception('Переменная {} не найдена'.format(name))
+
+
+def variable_set(context, name, value):
+    current = context.scopes[context.current]
+    if name in current:
+        current[name] = value
+        return
+    raise Exception('Переменная {} не найдена'.format(name))