Simplify Config setup and move some functions to dedicated files

config.py

@@ -1,9 +1,11 @@
+from dotenv import load_dotenv
 from werkzeug.middleware.proxy_fix import ProxyFix
 import logging
 import os
 
 
-ROOT_DIR = os.path.abspath(os.path.dirname(__file__))
+basedir = os.path.abspath(os.path.dirname(__file__))
+load_dotenv(os.path.join(basedir, '.env'))
 
 
 class Config:
@@ -33,6 +35,10 @@ class Config:
     MAIL_USE_TLS = os.environ.get('MAIL_USE_TLS', 'false').lower() == 'true'
 
     ''' # Flask-SQLAlchemy # '''
+    SQLALCHEMY_DATABASE_URI = os.environ.get(
+        'SQLALCHEMY_DATABASE_URI',
+        'sqlite:///' + os.path.join(basedir, 'app.db')
+    )
     SQLALCHEMY_RECORD_QUERIES = True
     SQLALCHEMY_TRACK_MODIFICATIONS = False
 
@@ -52,7 +58,7 @@ class Config:
             'datefmt': os.environ.get('NOPAQUE_LOG_DATE_FORMAT',
                                       '%Y-%m-%d %H:%M:%S'),
             'filename': os.environ.get('NOPAQUE_LOG_FILE',
-                                       os.path.join(ROOT_DIR, 'nopaque.log')),
+                                       os.path.join(basedir, 'nopaque.log')),
             'format': os.environ.get(
                 'NOPAQUE_LOG_FORMAT',
                 '[%(asctime)s] %(levelname)s in '
@@ -72,37 +78,3 @@ class Config:
             'x_proto': int(os.environ.get('NOPAQUE_PROXY_FIX_X_PROTO', '0'))
         }
         app.wsgi_app = ProxyFix(app.wsgi_app, **proxy_fix_kwargs)
-
-
-class DevelopmentConfig(Config):
-    ''' # Flask # '''
-    DEBUG = True
-
-    ''' # Flask-SQLAlchemy # '''
-    SQLALCHEMY_DATABASE_URI = os.environ.get(
-        'SQLALCHEMY_DATABASE_URI',
-        'postgresql://nopaque:nopaque@db/nopaque_dev'
-    )
-
-
-class ProductionConfig(Config):
-    ''' # Flask-SQLAlchemy # '''
-    SQLALCHEMY_DATABASE_URI = os.environ.get(
-        'SQLALCHEMY_DATABASE_URI', 'postgresql://nopaque:nopaque@db/nopaque')
-
-
-class TestingConfig(Config):
-    ''' # Flask # '''
-    TESTING = True
-    WTF_CSRF_ENABLED = False
-
-    ''' # Flask-SQLAlchemy # '''
-    SQLALCHEMY_DATABASE_URI = os.environ.get(
-        'SQLALCHEMY_DATABASE_URI',
-        'postgresql://nopaque:nopaque@db/nopaque_test'
-    )
-
-
-config = {'development': DevelopmentConfig,
-          'production': ProductionConfig,
-          'testing': TestingConfig}