Refactored configuration system

src/backend/lib/config.py

@@ -17,6 +17,7 @@ class Config:
     Attributes
     ----------
     root : str() stores root.
+    config_structure : dict() Default Configuration Structure.
     _fp : str() file pointer to main configuration.
     _cp : Path() object of configuration file.
     _data : dict() parsed json of _fp.
@@ -48,13 +49,32 @@ class Config:
     def __init__(self, root):
         """Initialize main configuration options."""
         self.root = root
+        self.config_structure = {
+            "TITLE": "pyShelf E-Book Server",
+            "VERSION": "0.7.0",
+            "BOOKPATH": "/books",
+            "DB_HOST": "localhost",
+            "DB_PORT": "5432",
+            "DB_ENGINE": "sqlite",
+            "DATABASE": "pyshelf",
+            "USER": "pyshelf",
+            "PASSWORD": "pyshelf",
+            "BOOKSHELF": "data/shelf.json",
+            "ALLOWED_HOSTS": [
+                "localhost",
+                "127.0.0.1",
+                "[::1]",
+                "0.0.0.0"
+            ],
+            "BUILD_MODE": "development"
+        }
         env = os.environ.copy()
         self._fp = "config.json"
         try:
             self._cp = pathlib.Path.joinpath(root, self._fp)
         except AttributeError:
             self._cp = pathlib.Path(root, self._fp)
-        self._data = self.open_file()
+        self._data = self.init_config()
         try:
             self.logger
         except AttributeError:
@@ -78,6 +98,15 @@ class Config:
         self.db_pass = env.get("PASSWORD", self._data["PASSWORD"])
         self.build_mode = env.get("BUILD_MODE", self._data["BUILD_MODE"])
 
+    def init_config(self):
+        try:
+            return self.open_file()
+        except FileNotFoundError:
+            with open(self._fp, 'w') as _config_file:
+                json.dump(self.config_structure, _config_file)
+                _config_file.close()
+            return self.open_file()
+
     def get_logger(self):
         """Instantiate logging system."""
         _logger = logger

src/backend/lib/storage.py

@@ -49,12 +49,7 @@ class Storage:
         str : sqlalchemy Connection String
         """
         if self.config.db_engine == "sqlite":
-            if os.path.exists(f"{self.config.root}/pyshelf.db"):
-                return f"sqlite:////{self.config.root}/pyshelf.db"
-            else:
-                sqlite_file = open(f'{self.config.root}/pyshelf.db', 'w')
-                sqlite_file.close()
-                return f"sqlite://{self.config.root}/pyshelf.db"
+            return f"sqlite:////{self.config.root}/pyshelf.db"
         elif self.config.db_engine == "psql":
             return f"postgresql://{self.user}:{self.password}\
             @{self.db_host}:{self.db_port}/{self.sql}"