🏸使用昵称映射表来确保不重复下载改名作者的作品 #472

Util/NickMapper.py

@@ -1 +1,122 @@
+#!/usr/bin/env python
+# -*- encoding: utf-8 -*-
+'''
+@Description:NickMapper.py
+@Date       :2023/07/17 16:56:50
+@Author     :JohnserfSeed
+@version    :0.0.1
 @License    :MIT License
+@Github     :https://github.com/johnserf-seed
+@Mail       :johnserf-seed@foxmail.com
+-------------------------------------------------
+Change Log  :
+2023/07/17 16:56:50 - 初始化用户昵称与作品映射
+-------------------------------------------------
+'''
+
+import sqlite3
+
+class NickMapper:
+    def __init__(self, db_name: str) -> None:
+        """
+        初始化 NickMapper 对象
+
+        Args:
+            db_name (str): 昵称映射表的数据库名称
+        """
+        self.db_name = db_name
+        self.conn = None
+
+    def connect(self) -> None:
+        """
+        连接到数据库并创建昵称映射表
+        """
+        self.conn = sqlite3.connect(self.db_name)
+        self._create_table()
+
+    def _create_table(self) -> None:
+        """
+        在数据库中创建昵称映射表
+        """
+        c = self.conn.cursor()
+        c.execute('''CREATE TABLE IF NOT EXISTS nickname_mapping
+                        (sec_user_id TEXT PRIMARY KEY, nickname TEXT)''')
+
+    def add_mapping(self, sec_user_id: str, nickname: str) -> None:
+        """
+        添加昵称映射
+
+        Args:
+            sec_user_id (str): 用户唯一标识
+            nickname (str): 可变昵称
+        """
+        c = self.conn.cursor()
+
+        # 检查用户 ID 是否已经存在
+        c.execute('SELECT * FROM nickname_mapping WHERE sec_user_id=?', (sec_user_id,))
+        result = c.fetchone()
+
+        if result:
+            # 用户 ID 已存在，更新昵称映射
+            c.execute('UPDATE nickname_mapping SET nickname=? WHERE sec_user_id=?', (nickname, sec_user_id))
+        else:
+            # 用户 ID 不存在，插入新的昵称映射
+            c.execute('INSERT INTO nickname_mapping VALUES (?, ?)', (sec_user_id, nickname))
+
+        self.conn.commit()
+
+    def update_mapping(self, sec_user_id: str, new_nickname: str) -> None:
+        """
+        更新昵称映射
+
+        Args:
+            sec_user_id (str): 用户唯一标识
+            new_nickname (str): 新的可变昵称
+        """
+        c = self.conn.cursor()
+
+        # 检查用户 ID 是否已经存在
+        c.execute('SELECT * FROM nickname_mapping WHERE sec_user_id=?', (sec_user_id,))
+        result = c.fetchone()
+
+        if result:
+            # 用户 ID 存在，更新昵称映射
+            c.execute('UPDATE nickname_mapping SET nickname=? WHERE sec_user_id=?', (new_nickname, sec_user_id))
+        else:
+            # 用户 ID 不存在，可抛出异常
+            raise ValueError(f"User ID '{sec_user_id}' does not exist in the nickname mapping table.")
+
+        self.conn.commit()
+
+    def get_nickname(self, sec_user_id: str) -> str:
+        """
+        获取昵称映射
+
+        Args:
+            sec_user_id (str): 用户唯一标识
+
+        Returns:
+            str: 对应的可变昵称，如果不存在则返回 None
+        """
+        c = self.conn.cursor()
+        c.execute('SELECT nickname FROM nickname_mapping WHERE sec_user_id=?', (sec_user_id,))
+        result = c.fetchone()
+        return result[0] if result else None
+
+    def delete_mapping(self, sec_user_id: str) -> None:
+        """
+        删除昵称映射
+
+        Args:
+            sec_user_id (str): 用户唯一标识
+        """
+        c = self.conn.cursor()
+        c.execute('DELETE FROM nickname_mapping WHERE sec_user_id=?', (sec_user_id,))
+        self.conn.commit()
+
+    def close(self) -> None:
+        """
+        关闭与数据库的连接
+        """
+        if self.conn:
+            self.conn.close()