refactor database connection to use SQLAlchemy, update .gitignore for SQLite, and remove MySQL configuration from sample config

.gitignore

@@ -7,7 +7,7 @@ __pycache__/
 /config.json
 
 # Ignore the virtual environment directory
-venv/
+.venv/
 
 # Ignore the build directory
 build/
@@ -20,3 +20,5 @@ dist/
 
 # Ignore any .DS_Store files created by macOS
 .DS_Store
+
+fastdoi.sqlite3

config.json.sample

@@ -2,9 +2,6 @@
     "fastgpt_host": "",
     "fastgpt_api": "",
     "fastgpt_setId": "",
-    "mysql_host": "",
-    "mysql_user": "",
-    "mysql_password": "",
     "semAPI": "semanticscholar API",
     "miniflux_host": "",
     "miniflux_api": ""

main.py

@@ -59,4 +59,4 @@ async def load_rss():
 if __name__ == '__main__':
     import uvicorn
     uvicorn.run(app, host="127.0.0.1", port=8964)
-    mysql_connector.end_mysql()
+    mysql_connector.end_sqlalchemy()

mysql_connector.py

@@ -2,35 +2,33 @@
 
 from config import __CONFIG__
 
-import mysql.connector
+from sqlalchemy import create_engine, Column, String, Integer
+from sqlalchemy.orm import sessionmaker, declarative_base
+import os
 
-mysql_config = {
-    'user': __CONFIG__['mysql_user'],
-    'password': __CONFIG__['mysql_password'],
-    'host': __CONFIG__['mysql_host'],  # Typically 'localhost' if the database is on the same machine
-    'database': 'fastdoi',
-    'raise_on_warnings': True,
-    'auth_plugin':'mysql_native_password'
-}
+# SQLite database file path (in the current directory)
+db_path = os.path.join(os.path.dirname(__file__), 'fastdoi.sqlite3')
+engine = create_engine(f'sqlite:///{db_path}', echo=False)
+Session = sessionmaker(bind=engine)
+session = Session()
+Base = declarative_base()
 
-# Establish a connection to the MySQL database
-cnx = mysql.connector.connect(**mysql_config)
-cursor = cnx.cursor()
+class UploadedPaper(Base):
+    __tablename__ = 'uploaded_papers'
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    paperId = Column(String, unique=True, nullable=False)
 
-def end_mysql():
-    try:
-        # Close the cursor and connection
-        cursor.close()
-        cnx.close()
-    except:
-        print("No Mysql Opened.")
+# Create the table if it doesn't exist
+Base.metadata.create_all(engine)
+
+def end_sqlalchemy():
+    session.close()
+    engine.dispose()
 
 def is_loaded(paperId):
-    query = ("SELECT COUNT(*) FROM uploaded_papers WHERE paperId = %s")
-    cursor.execute(query, (paperId,))
-    return cursor.fetchone()[0] > 0
+    return session.query(UploadedPaper).filter_by(paperId=paperId).count() > 0
 
 def new_load(paperId):
-    query = ("INSERT INTO uploaded_papers (paperId) VALUES (%s)")
-    cursor.execute(query, (paperId,))    
-    cnx.commit()
+    paper = UploadedPaper(paperId=paperId)
+    session.add(paper)
+    session.commit()