Add newsgroup table

db/newsgroup.sql

@@ -1,11 +1,21 @@
 begin transaction;
 
+create table newsgroup (
+    id          INTEGER PRIMARY KEY NOT NULL,
+    name        TEXT NOT NULL,
+    description TEXT NOT NULL
+);
+
 create table newsgroup_message (
     id           INTEGER PRIMARY KEY NOT NULL,
+    newsgroup_id INTEGER NOT NULL,
+    message_id   TEXT NOT NULL,
     created_on   DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     sender       TEXT NOT NULL,
     subject      TEXT NOT NULL,
-    content    TEXT NOT NULL
+    content      TEXT NOT NULL,
+
+    FOREIGN KEY(newsgroup_id) REFERENCES newsgroup(id)
 );
 
 commit;

lib/nntp/tiny/db.py

@@ -8,14 +8,16 @@ class Database():
     def __init__(self, path: str):
         self.db = sqlite3.connect(path)
 
-    def message_add(self, message: Message):
+    def message_add(self, newsgroup_id: int, message: Message):
         sql = """
             insert into
                 newsgroup_message
-            (created_on, sender, subject, content) values (?, ?, ?, ?)
+            (newsgroup_id, message_id, created_on, sender, subject, content) values (?, ?, ?, ?, ?, ?)
         """
 
         self.db.execute(sql, (
+            newsgroup_id,
+            message.id(),
             message.date().isoformat(),
             message.sender(),
             message.subject(),