Add config file support for listener, database

lib/nntp/tiny/config.py

@@ -0,0 +1,37 @@
+import os
+import configparser
+
+from typing import Optional
+
+class ConfigException(Exception):
+    def __init__(self, path: str):
+        self.path = path
+
+    def __str__(self):
+        return "Unable to locate file '" + self.path + "'"
+
+class Config():
+    SEARCH_PATHS = [
+        './server.conf',
+        '/etc/nntp-tiny/server.conf'
+    ]
+
+    @staticmethod
+    def find():
+        for path in Config.SEARCH_PATHS:
+            if os.path.exists(path):
+                return path
+
+        return None
+
+    def load(path: Optional[str]=None):
+        if path is None:
+            path = Config.find()
+            
+        if path is None:
+            raise ConfigException(path)
+
+        parser = configparser.ConfigParser()
+        parser.read(path)
+
+        return parser

lib/nntp/tiny/server.py

@@ -2,8 +2,10 @@ import enum
 import socket
 import threading
 
-from typing import Callable
+from configparser import ConfigParser
 
+from nntp.tiny.config    import Config
+from nntp.tiny.db        import Database
 from nntp.tiny.newsgroup import Newsgroup
 from nntp.tiny.session   import Session
 
@@ -13,13 +15,16 @@ class ServerCapability(enum.Flag):
     POST = enum.auto()
 
 class Server():
-    def __init__(self, connect_to_db: Callable):
-        self.connect_to_db = connect_to_db
-        self.capabilities  = ServerCapability.NONE
-        self.newsgroups    = dict()
+    def __init__(self, config: ConfigParser):
+        self.config       = config
+        self.capabilities = ServerCapability.NONE
+        self.newsgroups   = dict()
 
         self._init_newsgroups()
 
+    def connect_to_db(self):
+        return Database.connect(self.config['database']['path'])
+
     def _init_newsgroups(self):
         db = self.connect_to_db()
 
@@ -27,8 +32,11 @@ class Server():
             self.newsgroups[newsgroup.name.casefold()] = newsgroup
 
     def run(self):
+        host = self.config['listen']['host']
+        port = int(self.config['listen']['port'])
+
         listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        listener.bind(('localhost', 1190))
+        listener.bind((host, port))
         listener.listen()
 
         while True: