using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KevDrawServer
{
    public class GlobalSession
    {
        /// <summary>
        ///  存储共享数据的全局字典
        /// </summary>
        private static readonly Dictionary<string, object> sharedData = new Dictionary<string, object>();

        /// <summary>
        /// Stores the data.
        /// </summary>
        /// <param name="key">The key.</param>
        /// <param name="data">The data.</param>
        public static void StoreData(string key, object data)
        {
            lock (sharedData)
            {
                sharedData[key] = data;
            }
        }
        /// <summary>
        /// Gets the data.
        /// </summary>
        /// <param name="key">The key.</param>
        /// <returns>An object.</returns>
        public static object GetData(string key)
        {
            lock (sharedData)
            {
                return sharedData.TryGetValue(key, out object data) ? data : null;
            }
        }
        public static bool ContainsKey(string key)
        {
            return sharedData.ContainsKey(key);
        }
        /// <summary>
        /// Tries the get value.
        /// </summary>
        /// <param name="key">The key.</param>
        /// <param name="value">The value.</param>
        /// <returns>A bool.</returns>
        public static bool TryGetValue(string key, out object value)
        {
            lock (sharedData)
            {
                return sharedData.TryGetValue(key, out value);
            }
        }
        /// <summary>
        /// 删除数据.
        /// </summary>
        /// <param name="key">The key.</param>
        /// <param name="data">The data.</param>
        /// <returns>A bool.</returns>
        public static bool TryRemove(string key, out object data)
        {
            lock (sharedData)
            {
                bool bFound = sharedData.TryGetValue(key, out data);
                if (bFound)
                {
                    sharedData.Remove(key);
                    return true;
                }
            }
            return false;
        }
    }
}