Refactor notifier and add helpers

latecomers/helpers.py

@@ -0,0 +1,41 @@
+# -*- encoding: utf-8 -*-
+import logging
+import typing as T
+
+
+def logit(logger: logging.Logger) -> T.Callable[..., T.Any]:
+    def wrapper(func: T.Callable[..., T.Any]) -> T.Callable[..., T.Any]:
+        def inner(*args, **kwargs):
+            try:
+                value = func(*args, **kwargs)
+                logger.info(f"Success: {func.__name__}(args={args}, kwargs={kwargs})")
+                return value
+            except Exception as e:
+                logger.error(f"Failure: {e}")
+
+        return inner
+
+    return wrapper
+
+
+def retry_and_log(logger: logging.Logger, retries: int):
+    """
+    This decorator wraps a function, logs at info in case of success and logs
+    error in case an exception is raised.
+    """
+
+    def wrapper(func: T.Callable[..., T.Any]) -> T.Callable[..., T.Any]:
+        def inner(*args, **kwargs):
+            for i in range(retries):
+                try:
+                    value = func(*args, **kwargs)
+                    logger.info(
+                        f"Success ({i+1} tentative): {func.__name__}(args={args}, kwargs={kwargs})"  # noqa: E501
+                    )
+                    return value
+                except Exception as e:
+                    logger.error(f"Failure ({i+1} tentative): {e}")
+
+        return inner
+
+    return wrapper

latecomers/notifier.py

@@ -10,27 +10,13 @@ import ssl
 import typing as T
 
 
+from latecomers.helpers import retry_and_log
+
+
 RETRIES = 3
 logger = logging.getLogger(__name__)
 
 
-def retry_and_log(func: T.Callable[..., T.Any]) -> T.Callable[..., T.Any]:
-    """
-    This decorator wraps a function, logs at info in case of success and logs
-    error in case an exception is raised.
-    """
-    def inner(*args, **kwargs):
-        for i in range(RETRIES):
-            try:
-                func(*args, **kwargs)
-                logger.info(f"Success ({i+1} tentative): {func.__name__}(args={args}, kwargs={kwargs})")  # noqa: E501
-                return
-            except Exception as e:
-                logger.error(f"Failure ({i+1} tentative): {e}")
-
-    return inner
-
-
 class Notifier(object):
     def __init__(
         self,
@@ -65,7 +51,7 @@ class Notifier(object):
         self._conn.sendmail(self._from, to, email)
         self._conn.close()
 
-    @retry_and_log
+    @retry_and_log(logger, RETRIES)
     def send_result(self, to: T.List[T.Text], result: bytes) -> None:
         date = datetime.now().strftime("%Y-%m-%d")
         body = f"Resoconto dei voli dal sito di AdR per l'aereoporto di Ciampino in data {date}"  # noqa: E501
@@ -90,3 +76,23 @@ class Notifier(object):
         email = message.as_string()
 
         self.send(to, email)
+
+    @retry_and_log(logger, RETRIES)
+    def send_no_data(self, to: T.List[T.Text]) -> None:
+        date = datetime.now().strftime("%Y-%m-%d")
+        body = f"""Attenzione
+
+Nessun dato è stato trovato per i voli in data {date} dal sito di AdR per
+l'aereoporto di Ciampino. Questo è probabile indice di errore. Contattate
+il vostro tecnico preferito.
+        """
+
+        message = MIMEMultipart()
+        message["From"] = self._from
+        message["To"] = ",".join(to)
+        message["Subject"] = f"ATTENZIONE: [{date}] Resoconto CIA da AdR"
+
+        message.attach(MIMEText(body, "plain"))
+        email = message.as_string()
+
+        self.send(to, email)