added logging to mail and file

.vscode/launch.json

@@ -10,7 +10,9 @@
             "request": "launch",
             "module": "flask",
             "env": {
-                "FLASK_APP": "dvdcollection.py"
+                "FLASK_APP": "dvdcollection.py",
+                "MAIL_SERVER":"localhost",
+                "MAIL_PORT":8025
             },
             "args": [
                 "run",

app/__init__.py

@@ -1,3 +1,8 @@
+import os
+import logging
+from logging.handlers import SMTPHandler
+from logging.handlers import RotatingFileHandler
+
 from flask import Flask
 from config import Config
 from flask_sqlalchemy import SQLAlchemy
@@ -13,4 +18,39 @@
 
 from app import routes
 from app import models
-from app import errors
+from app import errors
+
+if not app.debug:
+    if app.config["MAIL_SERVER"]:
+        auth = None
+        if app.config["MAIL_USERNAME"] or app.config["MAIL_PASSWORD"]:
+            auth = (app.config["MAIL_USERNAME"],app.config["MAIL_PASSWORD"])
+        secure = None
+        if app.config["MAIL_USE_TLS"]:
+            secure = ()
+        mail_handler = SMTPHandler(
+            mailhost=(app.config["MAIL_SERVER"], app.config["MAIL_PORT"]),
+            fromaddr="no-reply@" + app.config["MAIL_SERVER"],
+            toaddrs= app.config["ADMINS"], 
+            subject="Microblog Failure", 
+            credentials=auth,
+            secure=secure
+        )
+        mail_handler.setLevel(logging.ERROR)
+        app.logger.addHandler(mail_handler)
+
+    if not os.path.exists('logs'):
+        os.mkdir("logs")
+    file_handler = RotatingFileHandler(
+        "logs/microblog.log",
+        maxBytes=10240,
+        backupCount= 10
+    )
+    file_handler.setFormatter(logging.Formatter(
+        "%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]"
+    ))
+    file_handler.setLevel(logging.INFO)
+    app.logger.addHandler(file_handler)
+
+    app.logger.setLevel(logging.INFO)
+    app.logger.info("Microblog started")