bot/add_character.py

@@ -1,12 +1,11 @@
 import requests
 from misskey.exceptions import MisskeyAPIException
 from client import client_connection
-from db_utils import insert_character
+from db_utils import get_db_connection
 
 def add_character(name: str, rarity: int, weight: float, image_url: str) -> tuple[int, str]:
     """
-    Adds a character to the database, uploading the image from a public URL to
+    Adds a character to the database, uploading the image from a public URL to the bot's Misskey Drive.
-    the bot's Misskey Drive.
 
     Args:
         name (str): Character name.
@@ -21,6 +20,7 @@ def add_character(name: str, rarity: int, weight: float, image_url: str) -> tupl
         ValueError: If inputs are invalid.
         RuntimeError: If image download/upload or database operation fails.
     """
+    try:
         # Validate inputs
         if not name or not name.strip():
             raise ValueError("Character name cannot be empty.")
@@ -45,5 +45,16 @@ def add_character(name: str, rarity: int, weight: float, image_url: str) -> tupl
             raise RuntimeError(f"Failed to upload image to bot's Drive: {e}") from e
 
         # Insert into database
-    character_id = insert_character(name.strip(), rarity, float(weight), file_id)
+        conn = get_db_connection()
+        cur = conn.cursor()
+        cur.execute(
+            'INSERT INTO characters (name, rarity, weight, file_id) VALUES (?, ?, ?, ?)',
+            (name.strip(), rarity, float(weight), file_id)
+        )
+        conn.commit()
+        character_id = cur.lastrowid
+
         return character_id, file_id
+    finally:
+        if 'conn' in locals():
+            conn.close()

bot/bot_app.py

@@ -1,7 +1,6 @@
 import time
 import misskey as misskey
 from client import client_connection
-import db_utils as db
 
 from config import NOTIFICATION_POLL_INTERVAL
 from notification import process_notifications
@@ -9,9 +8,6 @@ from notification import process_notifications
 if __name__ == '__main__':
     # Initialize the Misskey client
     client = client_connection()
-    # Connect to DB
-    db.connect()
-
     print('Listening for notifications...')
     while True:
         if not process_notifications(client):

bot/db_utils.py

@@ -1,32 +1,15 @@
-from random import choices
 import sqlite3
 import config
 
 DB_PATH = config.DB_PATH
-CONNECTION: sqlite3.Connection
-CURSOR: sqlite3.Cursor
 
-def connect() -> None:
+# Database functions
+
+def get_db_connection():
     '''Creates a connection to the database'''
-    print('Connecting to the database...')
+    conn = sqlite3.connect(DB_PATH)
-    global CONNECTION
+    conn.row_factory = sqlite3.Row
-    global CURSOR
+    return conn
-    CONNECTION = sqlite3.connect(DB_PATH, autocommit=True)
-    CONNECTION.row_factory = sqlite3.Row
-    CURSOR = CONNECTION.cursor()
-
-def get_random_character():
-    ''' Gets a random character from the database'''
-    CURSOR.execute('SELECT * FROM characters')
-    characters = CURSOR.fetchall()
-
-    if not characters:
-        return None, None, None, None
-
-    weights = [c['weight'] for c in characters]
-    chosen = choices(characters, weights=weights, k=1)[0]
-
-    return chosen['id'], chosen['name'], chosen['file_id'], chosen['rarity']
 
 
 # User functions
@@ -34,53 +17,64 @@ def get_random_character():
 def get_or_create_user(username):
     '''Retrieves an ID for a given user, if the user does not exist, it will be
     created.'''
-    CURSOR.execute('SELECT id FROM users WHERE username = ?', (username,))
+    conn = get_db_connection()
-    user = CURSOR.fetchone()
+    conn.row_factory = sqlite3.Row
+    cur = conn.cursor()
+    cur.execute('SELECT id FROM users WHERE username = ?', (username,))
+    user = cur.fetchone()
     if user:
+        conn.close()
         return user[0]
 
     # New user starts with has_rolled = False
-    CURSOR.execute(
+    cur.execute(
         'INSERT INTO users (username, has_rolled) VALUES (?, ?)',
         (username, False)
     )
-    user_id = CURSOR.lastrowid
+    conn.commit()
+    user_id = cur.lastrowid
+    conn.close()
     return user_id
 
-def insert_character(name: str, rarity: int, weight: float, file_id: str) -> int:
-    '''Inserts a character'''
-    CURSOR.execute(
-        'INSERT INTO characters (name, rarity, weight, file_id) VALUES (?, ?, ?, ?)',
-        (name, rarity, weight, file_id)
-    )
-    character_id = CURSOR.lastrowid
-    return character_id if character_id else 0
 
-def insert_pull(user_id, character_id):
+# Gameplay functions
+
+def add_pull(user_id, character_id):
     '''Creates a pull in the database'''
-    CURSOR.execute(
+    conn = get_db_connection()
-        'INSERT INTO pulls (user_id, character_id) VALUES (?, ?)',
+    cur = conn.cursor()
-        (user_id, character_id)
+    cur.execute('INSERT INTO pulls (user_id, character_id) VALUES (?, ?)', (user_id, character_id))
-    )
+    conn.commit()
+    conn.close()
 
 def get_last_rolled_at(user_id):
     '''Gets the timestamp when the user last rolled'''
-    CURSOR.execute("SELECT timestamp FROM pulls WHERE user_id = ? ORDER BY timestamp DESC", \
+    conn = get_db_connection()
+    cur = conn.cursor()
+    cur.execute("SELECT timestamp FROM pulls WHERE user_id = ? ORDER BY timestamp DESC", \
             (user_id,))
-    row = CURSOR.fetchone()
+    row = cur.fetchone()
+    conn.close()
     return row[0] if row else None
 
 # Configuration
 
 def get_config(key):
     '''Reads the value for a specified config key from the db'''
-    CURSOR.execute("SELECT value FROM config WHERE key = ?", (key,))
+    conn = get_db_connection()
-    row = CURSOR.fetchone()
+    cur = conn.cursor()
+    cur.execute("SELECT value FROM config WHERE key = ?", (key,))
+    row = cur.fetchone()
+    conn.close()
     return row[0] if row else None
 
 def set_config(key, value):
     '''Writes the value for a specified config key to the db'''
+    conn = get_db_connection()
+    cur = conn.cursor()
     cur.execute("INSERT OR REPLACE INTO config (key, value) VALUES (?, ?)", (key, value))
+    conn.commit()
+    conn.close()
 
 
 # Character stat functions

bot/response.py

@@ -1,8 +1,25 @@
+import random
 from datetime import datetime, timedelta, timezone
-from db_utils import get_or_create_user, insert_pull, get_last_rolled_at, get_random_character
+from db_utils import get_or_create_user, add_pull, get_db_connection, get_last_rolled_at
 from add_character import add_character
 from config import GACHA_ROLL_INTERVAL
 
+def get_character():
+    ''' Gets a random character from the database'''
+    conn = get_db_connection()
+    cur = conn.cursor()
+    cur.execute('SELECT * FROM characters')
+    characters = cur.fetchall()
+    conn.close()
+
+    if not characters:
+        return None, None, None, None
+
+    weights = [c['weight'] for c in characters]
+    chosen = random.choices(characters, weights=weights, k=1)[0]
+
+    return chosen['id'], chosen['name'], chosen['file_id'], chosen['rarity']
+
 def do_roll(full_user):
     '''Determines whether the user can roll, then pulls a random character'''
     user_id = get_or_create_user(full_user)
@@ -33,12 +50,12 @@ def do_roll(full_user):
 
             return f'{full_user} ⏱️ Please wait another {remaining_duration} before rolling again.'
 
-    character_id, character_name, file_id, rarity = get_random_character()
+    character_id, character_name, file_id, rarity = get_character()
 
     if not character_id:
         return f'{full_user} Uwaaa... something went wrong! No characters found. 😿'
 
-    insert_pull(user_id,character_id)
+    add_pull(user_id,character_id)
     stars = '⭐️' * rarity
     return([f"@{full_user} 🎲 Congrats! You rolled {stars} **{character_name}**\n\
             She's all yours now~ 💖✨",[file_id]])
@@ -77,6 +94,7 @@ def do_create(full_user, arguments, note_obj):
     )
     return([f'{full_user}Added {arguments[0]}, ID {character_id}.',[file_id]])
 
+
 def do_help(full_user):
     '''Provides a list of commands that the bot can do.'''
     return f'{full_user} Here\'s what I can do:\n \
@@ -84,6 +102,11 @@ def do_help(full_user):
             - `create <name> <rarity> <weight>` Creates a character using a given image.\
             - `help` Shows this message'
 
+def do_invalid_command(command, full_user):
+    '''Generic response when an unknown or invalid command is sent'''
+    return f'{full_user} Unrecognised command: {command}\n\
+            Message \'help\' to get a list of valid commands'
+
 def generate_response(parsed_command):
     '''Given a command with arguments, processes the game state and
     returns a response'''
@@ -97,4 +120,4 @@ def generate_response(parsed_command):
         case 'help':
             return do_help(command)
         case _:
-            return None
+            return do_invalid_command(command, full_user)

db.py

@@ -50,9 +50,6 @@ CREATE TABLE IF NOT EXISTS character_stats (
 )
 ''')
 
-# Initialize essential config key
-cursor.execute('INSERT INTO config VALUES ("last_seen_notif_id", 0)')
-
 """ # Insert example characters into the database if they don't already exist
 characters = [
     ('Murakami-san', 1, 0.35),