Open Source Extensible Enterprise n-tier Application Framework with Multilayered Architecture

using System;
using System.ComponentModel;
using System.Web.UI.WebControls;
using SiberTek.Xenta.Enums;
using SiberTek.Xenta.Presentation;
using SiberTek.Xenta.Presentation.Presenters;
using SiberTek.Xenta.Presentation.Utils;
using SiberTek.Xenta.Presentation.Views;
using SiberTek.Xenta.Presentation.Resources;
using SiberTek.Xenta.Web.Controls;
using SiberTek.Xenta.Web.Utils;

namespace SiberTek.Xenta.Web.Forum.Modules
{
    public partial class ForumTopicGrid : ViewBase<ForumTopicPresenter>, IPageable, IGrid
    {
        #region Properties
        [Browsable(false)]
        public string SearchTerm
        {
            get
            {
                return Convert.ToString(ViewState["SearchTerm"]);
            }
            set
            {
                ViewState["SearchTerm"] = value;
            }
        }

        [Browsable(false)]
        public int? ForumID
        {
            get
            {
                return (int?)ViewState["ForumID"];
            }
            set
            {
                ViewState["ForumID"] = value;
            }
        }

        [Browsable(false)]
        public int? AuthorID
        {
            get
            {
                return (int?)ViewState["AuthorID"];
            }
            set
            {
                ViewState["AuthorID"] = value;
            }
        }

        [Browsable(false)]
        public ForumTopicType? Type
        {
            get
            {
                return (ForumTopicType?)ViewState["Type"];
            }
            set
            {
                ViewState["Type"] = value;
            }
        }

        public ForumTopicOrderBy OrderBy
        {
            get
            {
                return ViewState["OrderBy"] == null ? ForumTopicOrderBy.CreatedOn : (ForumTopicOrderBy)ViewState["OrderBy"];
            }
            set
            {
                ViewState["OrderBy"] = value;
            }
        }

        public ForumTopicType TopicType
        {
            get
            {
                return ViewState["TopicType"] == null ? ForumTopicType.Normal : (ForumTopicType)ViewState["TopicType"];
            }
            set
            {
                ViewState["TopicType"] = value;
            }
        }

        [Browsable(false)]
        public int PageIndex
        {
            get
            {
                return Convert.ToInt32(ViewState["PageIndex"]);
            }
            set
            {
                ViewState["PageIndex"] = value;
            }
        }

        public int PageSize
        {
            get
            {
                return ViewState["PageSize"] == null ? Int32.MaxValue : Convert.ToInt32(ViewState["PageSize"]);
            }
            set
            {
                ViewState["PageSize"] = value;
            }
        }

        [Browsable(false)]
        public int PageCount
        {
            get
            {
                return Convert.ToInt32(ViewState["PageCount"]);
            }
            private set
            {
                ViewState["PageCount"] = value;
            }
        }

        public int RowCount
        {
            get
            {
                return gvForumTopicGrid.Rows.Count;
            }
        }
        #endregion

        #region Methods
        public override void BindData()
        {
            DataContainer["SearchTerm"] = SearchTerm;
            DataContainer["ForumID"] = ForumID;
            DataContainer["AuthorID"] = AuthorID;
            DataContainer["Type"] = Type;
            DataContainer["ShowHidden"] = false;
            DataContainer["OrderBy"] = OrderBy; 
            DataContainer["StartIndex"] = PageIndex * PageSize;
            DataContainer["Type"] = TopicType;
            DataContainer["Count"] = PageSize;

            Presenter.LoadCollection();

            PageCount = (int)DataContainer["TotalCount"] % PageSize == 0 ? (int)DataContainer["TotalCount"] / PageSize : (int)DataContainer["TotalCount"] / PageSize + 1;

            gvForumTopicGrid.DataSource = DataContainer["ForumTopicCollection"];
            gvForumTopicGrid.DataBind();

            base.BindData();
        }

        public void SetColumnVisibility(int index, bool value)
        {
            if(index >= 0 && index < gvForumTopicGrid.Columns.Count)
            {
                gvForumTopicGrid.Columns[index].Visible = value;
            }
        }
        #endregion

        #region Handlers
        protected override void OnInit(EventArgs e)
        {
            if(!IsPostBack)
            {
                gvForumTopicGrid.Columns[0].HeaderText = StringManager.GetString("Forum.ForumTopicGrid.colDetails.HeaderText");
                gvForumTopicGrid.Columns[1].HeaderText = StringManager.GetString("Forum.ForumTopicGrid.colAuthor.HeaderText");
                gvForumTopicGrid.Columns[2].HeaderText = StringManager.GetString("Forum.ForumTopicGrid.colPostCount.HeaderText");
                gvForumTopicGrid.Columns[3].HeaderText = StringManager.GetString("Forum.ForumTopicGrid.colCreatedOn.HeaderText");
                gvForumTopicGrid.EmptyDataText = StringManager.GetString("Forum.ForumTopicGrid.EmptyDataText");
            }
            base.OnInit(e);
        }

        protected void GvForumTopicGrid_OnRowDataBound(object sender, GridViewRowEventArgs e)
        {
            GridViewRow row = e.Row;

            if(row.RowType == DataControlRowType.DataRow)
            {
                ViewDataContainer item = e.Row.DataItem as ViewDataContainer;

                if(item != null)
                {
                    Literal lblAuthor = row.FindControl("lblAuthor") as Literal;
                    HyperLink lnkDetails = row.FindControl("lnkDetails") as HyperLink;
                    Literal lblCreatedOn = row.FindControl("lblCreatedOn") as Literal;
                    Literal lblPostCount = row.FindControl("lblPostCount") as Literal;

                    lblAuthor.Text = MembershipHelper.GetUsername((int)item["AuthorID"]);
                    lnkDetails.Text = (string)item["Title"];
                    lnkDetails.NavigateUrl = UrlHelper.FormatUrl("forum", "topic/{0}.aspx", item["TopicID"]);
                    lnkDetails.Enabled = ForumHelper.IsUserHasForumTopicPermission((int)item["TopicID"], UserContext.Current.UserID, (int)ForumPermission.ForumRead);
                    lblPostCount.Text = item["PostCount"].ToString();
                    lblCreatedOn.Text = UserContext.Current.DateTimeToDateString((DateTime)item["CreatedOn"]);
                }
            }
        }
        #endregion
    }
}