refactor(core): split vk and update services into modules

services/vk_service.py

@@ -0,0 +1,59 @@
+import os
+import sys
+import time
+
+from vk_api import VkApi
+from vk_api.exceptions import VkApiError
+
+
+class VkService:
+    def __init__(self):
+        self.session = None
+        self.api = None
+
+    def set_token(self, token):
+        self.session = VkApi(token=token)
+        self.api = self.session.get_api()
+
+    def clear(self):
+        self.session = None
+        self.api = None
+
+    @staticmethod
+    def build_auth_command(auth_url, output_path, entry_script_path=None):
+        if getattr(sys, "frozen", False):
+            return sys.executable, ["--auth", auth_url, output_path]
+        script_path = entry_script_path or os.path.abspath(__file__)
+        return sys.executable, [script_path, "--auth", auth_url, output_path]
+
+    @staticmethod
+    def vk_error_code(exc):
+        error = getattr(exc, "error", None)
+        if isinstance(error, dict):
+            return error.get("error_code")
+        return getattr(exc, "code", None)
+
+    @classmethod
+    def is_auth_error(cls, exc, formatted_message=None):
+        code = cls.vk_error_code(exc)
+        if code == 5:
+            return True
+        message = (formatted_message or str(exc)).lower()
+        return "invalid_access_token" in message or "user authorization failed" in message
+
+    @classmethod
+    def is_retryable_error(cls, exc):
+        return cls.vk_error_code(exc) in (6, 9, 10)
+
+    def call_with_retry(self, func, *args, **kwargs):
+        max_attempts = 5
+        for attempt in range(1, max_attempts + 1):
+            try:
+                return func(*args, **kwargs)
+            except VkApiError as e:
+                if not self.is_retryable_error(e) or attempt == max_attempts:
+                    raise
+                delay = min(2.0, 0.35 * (2 ** (attempt - 1)))
+                if self.vk_error_code(e) == 9:
+                    delay = max(delay, 1.0)
+                time.sleep(delay)