/// <summary>
/// 根据IP获取实际地址
/// </summary>
/// <param name="ip">网络地址</param>
/// <returns>返回实际地址</returns>
public static string GetAddress(string ip)
{
using (Model2DataContext db = new Model2DataContext())
{
string address = "";
IpToAddress ipToAddress = db.PondOfIpToAddress.FirstOrDefault(x => x.Ip == ip);
if (ipToAddress != null)
{
address = ipToAddress.Address;
}
else
{
string path = "http://www.ip138.com/ips138.asp?ip=" + ip;
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(path);
request.Method = "GET";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream stream = response.GetResponseStream();
StreamReader reader = new StreamReader(stream, Encoding.GetEncoding("gb2312"));
string html = reader.ReadToEnd();
stream.Close();
Regex reg = new Regex("<ul class=\"ul1\"><li>本站主数据：([\\w\\W]*)</li><li>参考数据");
address = reg.Match(html).Groups[1].Value;
IpToAddressManager.Create(ip, address);
}
return address;
}
}
public byte[] ReadPic(string token)
{
using (Model2DataContext db = new Model2DataContext())
{
Picture pic = db.PondOfPicture.First(x => x.Token == token);
return pic.Content;
}
}
/// <summary>
/// 声明已经阅读了某条
/// </summary>
/// <param name="messageId"></param>
/// <param name="username"></param>
public static void Read(int messageId, string username)
{
using (Model2DataContext db = new Model2DataContext())
{
Message message = db.PondOfMessage.FirstOrDefault(x => x.Id == messageId);
if (message == null) { throw new Exception("消息不存在"); }
if (message.Readed) { return; }
message.Readed = true;
db.SaveChanges();
}
}
/// <summary>
/// 发送一个新的聊天信息
/// </summary>
/// <param name="_from">发件人</param>
/// <param name="_to">收件人</param>
/// <param name="content">正文</param>
/// <param name="ip">来源地址</param>
/// <param name="address">来源地址</param>
/// <param name="readed">已经阅读</param>
/// <param name="isOfficial">一个布尔值 表示是否官方信息</param>
/// <returns>返回被创建的聊天信息的封装</returns>
public static Message Send(string _from, string _to, string content, string ip, string address
, bool readed, bool isOfficial = false)
{
using (Model2DataContext db = new Model2DataContext())
{
Message message = new Message(_from, _to, content, ip, address, readed, isOfficial);
db.PondOfMessage.Add(message);
db.SaveChanges();
return message;
}
}
/// <summary>
/// 创建一个新的Ip/实际地址对照
/// </summary>
/// <param name="ip">网络地址</param>
/// <param name="address">实际地址</param>
public static void Create(string ip, string address)
{
using (Model2DataContext db = new Model2DataContext())
{
db.PondOfIpToAddress.Where(x => x.Ip == ip)
.ToList()
.ForEach(x => db.PondOfIpToAddress.Remove(x));
IpToAddress t = new IpToAddress(ip, address);
db.PondOfIpToAddress.Add(t);
db.SaveChanges();
}
}
public static string Create(byte[] content)
{
using (Model2DataContext db = new Model2DataContext())
{
string token = Guid.NewGuid().ToString("N");
Picture pic = new Picture(token, content);
db.PondOfPicture.Add(pic);
db.SaveChanges();
return token;
}
}
/// <summary>
/// 读取未读信息列表
/// </summary>
/// <param name="targetUser">对方的用户名</param>
/// <param name="self">自己的用户名</param>
/// <returns>返回未读信息的列表</returns>
public static List<MessageResult> ReadUnreadMessages(string targetUser, string self)
{
using (Model2DataContext db = new Model2DataContext())
{
List<MessageResult> result = new List<MessageResult>();
List<Message> tList = db.PondOfMessage.Where(x => x.From == targetUser && x.To == self && !x.Readed)
.ToList();
tList.ForEach(x =>
{
x.Readed = true;
MessageResult mr = new MessageResult(x, x.From == self);
result.Add(mr);
});
db.SaveChanges();
return result;
}
}
/// <summary>
/// 读取聊天记录的分页列表
/// </summary>
/// <param name="targetUser">对方的用户名</param>
/// <param name="self">自己的用户名</param>
/// <param name="pageSize">每个页面包含信息条数</param>
/// <returns>返回聊天记录的分页列表</returns>
public static PaginationList<MessageResult> ReadMessages(string targetUser, string self, int page, int pageSize)
{
using (Model2DataContext db = new Model2DataContext())
{
int statrRow = (page - 1) * pageSize;
Expression<Func<Message, bool>> pre = x => (x.To == self && x.From == targetUser)
|| (x.From == self && x.To == targetUser);
int c = db.PondOfMessage.Count(pre);
List<MessageResult> t = db.PondOfMessage.Where(pre)
.OrderByDescending(x => x.CreatedTime)
.Skip(statrRow)
.Take(pageSize)
.ToList()
.ConvertAll(x => new MessageResult(x, x.From == self));
return new PaginationList<MessageResult>(page, pageSize, c, t);
}
}
/// <summary>
/// 读取未读信息的数量
/// </summary>
/// <param name="self">自己的用户名</param>
/// <returns>返回未读信息的数量</returns>
public static List<UnreadMessageCountResult> ReadCountOfUnreadMessages(string self)
{
using (Model2DataContext db = new Model2DataContext())
{
List<UnreadMessageCountResult> result = new List<UnreadMessageCountResult>();
List<string> tos = db.PondOfMessage.Where(x => x.To == self && !x.Readed)
.Select(x => x.From)
.Distinct()
.ToList();
tos.ForEach(sender =>
{
int c = db.PondOfMessage.Count(x => x.To == self && x.From == sender && !x.Readed);
result.Add(new UnreadMessageCountResult(sender, c));
});
return result;
}
}
