添加项目文件。

QYZH.InteractiveMagazine.Infrastructure/Cache/RedisHelper.cs

@@ -0,0 +1,119 @@
+using StackExchange.Redis;
+
+namespace QYZH.InteractiveMagazine.Infrastructure.Cache;
+
+/// <summary>
+/// Redis操作封装
+/// </summary>
+public static class RedisHelper
+{
+    private static string? _keyPrefix;
+
+    /// <summary>
+    /// Redis连接实例
+    /// </summary>
+    public static IConnectionMultiplexer? Connection { get; set; }
+
+    /// <summary>
+    /// 设置键前缀
+    /// </summary>
+    /// <param name="prefix">前缀字符串</param>
+    public static void SetKeyPrefix(string prefix)
+    {
+        _keyPrefix = prefix;
+    }
+
+    /// <summary>
+    /// 获取Redis数据库实例
+    /// </summary>
+    /// <param name="db">数据库索引</param>
+    /// <returns>IDatabase实例</returns>
+    public static IDatabase GetDatabase(int db = -1)
+    {
+        if (Connection == null || !Connection.IsConnected)
+        {
+            throw new InvalidOperationException("Redis连接未初始化或已断开");
+        }
+
+        return Connection.GetDatabase(db);
+    }
+
+    /// <summary>
+    /// 设置字符串值
+    /// </summary>
+    /// <param name="key">键</param>
+    /// <param name="value">值</param>
+    /// <param name="expiry">过期时间</param>
+    /// <returns>是否成功</returns>
+    public static async Task<bool> StringSetAsync(string key, string value, TimeSpan? expiry = null)
+    {
+        var db = GetDatabase();
+        var prefixedKey = GetPrefixedKey(key);
+
+        if (expiry.HasValue)
+        {
+            return await db.StringSetAsync(prefixedKey, value, (Expiration)expiry.Value);
+        }
+
+        return await db.StringSetAsync(prefixedKey, value);
+    }
+
+    /// <summary>
+    /// 获取字符串值
+    /// </summary>
+    /// <param name="key">键</param>
+    /// <returns>值</returns>
+    public static async Task<string?> StringGetAsync(string key)
+    {
+        var db = GetDatabase();
+        var prefixedKey = GetPrefixedKey(key);
+        return await db.StringGetAsync(prefixedKey);
+    }
+
+    /// <summary>
+    /// 删除键
+    /// </summary>
+    /// <param name="key">键</param>
+    /// <returns>是否成功</returns>
+    public static async Task<bool> KeyDeleteAsync(string key)
+    {
+        var db = GetDatabase();
+        var prefixedKey = GetPrefixedKey(key);
+        return await db.KeyDeleteAsync(prefixedKey);
+    }
+
+    /// <summary>
+    /// 检查键是否存在
+    /// </summary>
+    /// <param name="key">键</param>
+    /// <returns>是否存在</returns>
+    public static async Task<bool> KeyExistsAsync(string key)
+    {
+        var db = GetDatabase();
+        var prefixedKey = GetPrefixedKey(key);
+        return await db.KeyExistsAsync(prefixedKey);
+    }
+
+    /// <summary>
+    /// 设置键的过期时间
+    /// </summary>
+    /// <param name="key">键</param>
+    /// <param name="expiry">过期时间</param>
+    /// <returns>是否成功</returns>
+    public static async Task<bool> KeyExpireAsync(string key, TimeSpan expiry)
+    {
+        var db = GetDatabase();
+        var prefixedKey = GetPrefixedKey(key);
+        return await db.KeyExpireAsync(prefixedKey, expiry);
+    }
+
+    /// <summary>
+    /// 获取带前缀的键
+    /// </summary>
+    /// <param name="key">原始键</param>
+    /// <returns>带前缀的键</returns>
+    private static string GetPrefixedKey(string key)
+    {
+        return string.IsNullOrEmpty(_keyPrefix) ? key : $"{_keyPrefix}:{key}";
+    }
+}