MTP2.0_CSharp/Muchinfo.MTPClient/Fx4.0/Main/03.UI/Modules/Muchinfo.TASClient.Account/ViewModels/MessageInfoViewModel.cs

using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Command;
using Muchinfo.MTPClient.Data.Enums;
using Muchinfo.MTPClient.Data.Model;
using Muchinfo.MTPClient.Infrastructure.Utilities;
using System.Collections.ObjectModel;
using System.Linq;

namespace Muchinfo.MTPClient.Account.ViewModels
{
    public class MessageInfoViewModel : ViewModelBase
    {
        private bool _nextIsEnabled;

        public bool NextIsEnabled
        {
            get { return _nextIsEnabled; }
            set { Set(() => NextIsEnabled, ref _nextIsEnabled, value); }
        }

        private bool _returnIsEnabled;

        public bool ReturnIsEnabled
        {
            get { return _returnIsEnabled; }
            set { Set(() => ReturnIsEnabled, ref _returnIsEnabled, value); }
        }

        private int CurrentListIndex { get; set; }

        private Announcement _currentAnnouncement;

        public Announcement CurrentAnnouncement
        {
            get { return _currentAnnouncement; }
            set
            {
                Set(() => CurrentAnnouncement, ref _currentAnnouncement, value);
                SetCommand();
                UpdatReadStatus();
            }
        }
        private ObservableCollection<Announcement> _messageOrders;

        public ObservableCollection<Announcement> MessageOrders
        {
            get { return _messageOrders; }
            set { Set(() => MessageOrders, ref _messageOrders, value); }
        }

        private MsgTypeEnum _msgTypeEnum;
        /// <summary>
        /// 消息类型
        /// </summary>
        public MsgTypeEnum MsgTypeEnum
        {
            get { return _msgTypeEnum; }
            set
            {
                _msgTypeEnum = value;
                switch (value)
                {
                    case MsgTypeEnum.None:
                        break;
                    case MsgTypeEnum.Bulletin:
                        Title = Muchinfo.MTPClient.Resources.Muchinfo_Resource.Models_Notice;
                        break;
                    //case MsgTypeEnum.MSG:
                    //    break;
                    case MsgTypeEnum.NTF:
                        Title = Muchinfo.MTPClient.Resources.Muchinfo_Resource.Models_Inform;
                        break;
                    //case MsgTypeEnum.ALL:
                    //    break;
                    default:
                        break;
                }
               
            }
        }

        private string _title;
        /// <summary>
        /// 标题
        /// </summary>
        public string Title
        {
            get { return _title; }
            set { Set(() => Title, ref _title, value); }
        }

        public void UpdatReadStatus()
        {
            if (this.CurrentAnnouncement.ReadStatus == 0)
            {
                //修改阅读状态
                var userInfoList = UserManager.GetTradeAccounts();
                if (userInfoList != null)
                {
                    var userInfo = userInfoList.FirstOrDefault(z => z.UserName == UserManager.CurrentTradeAccount.LoginCode);
                    if (this.MsgTypeEnum == MsgTypeEnum.Bulletin)
                    {
                        if (userInfo != null && !userInfo.ReadAnnouncementIds.Contains(this.CurrentAnnouncement.MsgID))
                        {
                            this.CurrentAnnouncement.ReadStatus = 1;
                            userInfo.ReadAnnouncementIds.Add(this.CurrentAnnouncement.MsgID);
                            UserManager.SaveTradeAccount(userInfo);
                        }
                    }
                    if (this.MsgTypeEnum == MsgTypeEnum.NTF)
                    {
                        if (userInfo != null && !userInfo.ReadNoticeIds.Contains(this.CurrentAnnouncement.MsgID))
                        {
                            this.CurrentAnnouncement.ReadStatus = 1;
                            userInfo.ReadNoticeIds.Add(this.CurrentAnnouncement.MsgID);
                            UserManager.SaveTradeAccount(userInfo);
                        }
                    }
                }
            }
        }

        public void SetCommand()
        {
            if (MessageOrders != null && MessageOrders.Count > 0)
            {
                //this.CurrentListIndex = 0;
                //Announcement announcement = MessageOrders.FirstOrDefault(m => m.MsgID == this.CurrentAnnouncement.MsgID);
                //if (announcement != null)
                //{
                //    if (this.MessageOrders[0].MsgID == this.CurrentAnnouncement.MsgID)
                //        this.ReturnIsEnabled = false;
                //    else
                //        this.ReturnIsEnabled = true;
                //    if (this.MessageOrders[MessageOrders.Count - 1].MsgID == this.CurrentAnnouncement.MsgID)
                //        NextIsEnabled = false;
                //    else
                //        NextIsEnabled = true;
                //}
                this.CurrentListIndex = -1;
                var announcement = MessageOrders.FirstOrDefault(m => m.MsgID == this.CurrentAnnouncement.MsgID);
                if (announcement != null)
                {
                    this.CurrentListIndex = MessageOrders.IndexOf(announcement);
                    if (this.MessageOrders[0].MsgID == this.CurrentAnnouncement.MsgID)
                        this.ReturnIsEnabled = false;
                    else
                        this.ReturnIsEnabled = true;
                    if (this.MessageOrders[MessageOrders.Count - 1].MsgID == this.CurrentAnnouncement.MsgID)
                        NextIsEnabled = false;
                    else
                        NextIsEnabled = true;
                }
            }
        }

        /// <summary>
        /// 上一条
        /// </summary>
        public RelayCommand ReturnCommand
        {
            get
            {
                return new RelayCommand(() =>
                {
                    this.CurrentAnnouncement = MessageOrders[this.CurrentListIndex - 1];
                });
            }
        }

        /// <summary>
        /// 下一条
        /// </summary>
        public RelayCommand NextCommand
        {
            get
            {
                return new RelayCommand(() =>
                {
                    this.CurrentAnnouncement = MessageOrders[this.CurrentListIndex + 1];
                });
            }
        }

    }
}