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426 lines (366 loc) · 12.5 KB
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namespace BlogEngine.Core
{
using System;
using System.Text;
using System.Web;
using System.Collections.Generic;
using System.ComponentModel;
using System.Xml.Serialization;
using System.Security.Cryptography;
/// <summary>
/// Represents a comment to a blog post.
/// </summary>
[Serializable]
public sealed class Comment : IComparable<Comment>, IPublishable
{
#region Constants and Fields
/// <summary>
/// The comments.
/// </summary>
private List<Comment> comments;
/// <summary>
/// The date created.
/// </summary>
private DateTime dateCreated = DateTime.MinValue;
#endregion
#region Events
/// <summary>
/// Occurs after a comment is approved by the comment moderator.
/// </summary>
public static event EventHandler<EventArgs> Approved;
/// <summary>
/// Occurs just before a comment is approved by the comment moderator.
/// </summary>
public static event EventHandler<CancelEventArgs> Approving;
/// <summary>
/// Occurs after a comment is disapproved by the comment moderator.
/// </summary>
public static event EventHandler<EventArgs> Disapproved;
/// <summary>
/// Occurs just before a comment is disapproved by the comment moderator.
/// </summary>
public static event EventHandler<CancelEventArgs> Disapproving;
/// <summary>
/// Occurs when the post is being served to the output stream.
/// </summary>
public static event EventHandler<ServingEventArgs> Serving;
/// <summary>
/// Occurs when the page is being attacked by robot spam.
/// </summary>
public static event EventHandler<EventArgs> SpamAttack;
#endregion
#region Properties
/// <summary>
/// Gets the absolute link.
/// </summary>
/// <value>The absolute link.</value>
public Uri AbsoluteLink
{
get
{
return new Uri(string.Format("{0}#id_{1}", this.Parent.AbsoluteLink, this.Id));
}
}
/// <summary>
/// Gets or sets the author.
/// </summary>
/// <value>The author.</value>
public string Author { get; set; }
/// <summary>
/// Gets or sets the Avatar of the comment.
/// </summary>
public string Avatar { get; set; }
/// <summary>
/// Gets a list of Comments.
/// </summary>
public List<Comment> Comments
{
get
{
return this.comments ?? (this.comments = new List<Comment>());
}
}
/// <summary>
/// Gets or sets the content.
/// </summary>
/// <value>The content.</value>
public string Content { get; set; }
/// <summary>
/// Gets or sets the country.
/// </summary>
/// <value>The country.</value>
public string Country { get; set; }
/// <summary>
/// Gets or sets when the comment was created.
/// </summary>
public DateTime DateCreated
{
get
{
return this.dateCreated == DateTime.MinValue ? this.dateCreated : this.dateCreated.AddHours(BlogSettings.Instance.Timezone);
}
set
{
this.dateCreated = value;
}
}
/// <summary>
/// Gets the description. Returns always string.empty.
/// </summary>
/// <value>The description.</value>
public string Description
{
get
{
return string.Empty;
}
}
/// <summary>
/// Gets or sets the email.
/// </summary>
/// <value>The email.</value>
public string Email { get; set; }
/// <summary>
/// Gets or sets the IP address.
/// </summary>
/// <value>The IP address.</value>
public string IP { get; set; }
/// <summary>
/// Gets or sets the Id of the comment.
/// </summary>
public Guid Id { get; set; }
/// <summary>
/// Gets or sets a value indicating whether the Comment is approved.
/// </summary>
public bool IsApproved { get; set; }
/// <summary>
/// Indicate if comment is spam
/// </summary>
public bool IsSpam { get; set; }
/// <summary>
/// indicate if comment is deleted
/// </summary>
public bool IsDeleted { get; set; }
/// <summary>
/// Gets a value indicating whether or not this comment has been published
/// </summary>
public bool IsPublished
{
get
{
return IsApproved && !IsSpam && !IsDeleted;
}
}
/// <summary>
/// Gets a value indicating whether or not this comment should be shown
/// </summary>
/// <value></value>
public bool IsVisible
{
get
{
return IsApproved && !IsSpam && !IsDeleted;
}
}
/// <summary>
/// Gets a value indicating whether or not this comment is visible to visitors not logged into the blog.
/// </summary>
/// <value></value>
public bool IsVisibleToPublic
{
get
{
return IsApproved && !IsSpam && !IsDeleted;
}
}
/// <summary>
/// Gets or sets process that approved or rejected comment
/// </summary>
[XmlElement]
public string ModeratedBy { get; set; }
/// <summary>
/// Gets or sets the parent.
/// </summary>
/// <value>The parent.</value>
public IPublishable Parent { get; set; }
/// <summary>
/// Gets or sets the Id of the parent comment.
/// </summary>
public Guid ParentId { get; set; }
/// <summary>
/// Gets the relative link of the comment.
/// </summary>
/// <value>The relative link.</value>
public string RelativeLink
{
get
{
return string.Format("{0}#id_{1}", this.Parent.RelativeLink, this.Id);
}
}
/// <summary>
/// Gets abbreviated content
/// </summary>
public string Teaser
{
get
{
var ret = Utils.StripHtml(this.Content).Trim();
return ret.Length > 120 ? string.Format("{0} ...", ret.Substring(0, 116)) : ret;
}
}
/// <summary>
/// Pingbacks and trackbacks are identified by email
/// </summary>
public bool IsPingbackOrTrackback
{
get { return (this.Email.ToLowerInvariant() == "pingback" || this.Email.ToLowerInvariant() == "trackback") ? true : false; }
}
/// <summary>
/// Gets the title of the object
/// </summary>
/// <value></value>
public string Title
{
get
{
if (this.Website != null)
{
return string.Format("<a class=\"comment_auth\" href=\"{2}\" alt=\"{2}\" title=\"{2}\">{0}</a> on <a href=\"{3}\" alt=\"{3}\">{1}</a>", this.Author, this.Parent.Title, this.Website.ToString(), this.RelativeLink);
}
return string.Format("{0} on <a href=\"{2}\" alt=\"{2}\">{1}</a>", this.Author, this.Parent.Title, this.RelativeLink);
}
}
/// <summary>
/// Gets or sets the website.
/// </summary>
/// <value>The website.</value>
public Uri Website { get; set; }
/// <summary>
/// Gets Categories.
/// </summary>
StateList<Category> IPublishable.Categories
{
get
{
return null;
}
}
/// <summary>
/// Gets DateModified.
/// </summary>
DateTime IPublishable.DateModified
{
get
{
return this.DateCreated;
}
}
#endregion
#region Public Methods
/// <summary>
/// Called when [serving].
/// </summary>
/// <param name="comment">The comment.</param>
/// <param name="arg">The <see cref="BlogEngine.Core.ServingEventArgs"/> instance containing the event data.</param>
public static void OnServing(Comment comment, ServingEventArgs arg)
{
if (Serving != null)
{
Serving(comment, arg);
}
}
/// <summary>
/// Called when [spam attack].
/// </summary>
public static void OnSpamAttack()
{
if (SpamAttack != null)
{
SpamAttack(null, new EventArgs());
}
}
#endregion
#region Implemented Interfaces
#region IComparable<Comment>
/// <summary>
/// Compares the current object with another object of the same type.
/// </summary>
/// <param name="other">
/// An object to compare with this object.
/// </param>
/// <returns>
/// A 32-bit signed integer that indicates the relative order of the
/// objects being compared. The return value has the following meanings:
/// Value Meaning Less than zero This object is less than the other parameter.
/// Zero This object is equal to other. Greater than zero This object is greater than other.
/// </returns>
public int CompareTo(Comment other)
{
return this.DateCreated.CompareTo(other.DateCreated);
}
#endregion
#region IPublishable
/// <summary>
/// Raises the <see cref="Serving"/> event.
/// </summary>
/// <param name="eventArgs">The <see cref="BlogEngine.Core.ServingEventArgs"/> instance containing the event data.</param>
public void OnServing(ServingEventArgs eventArgs)
{
if (Serving != null)
{
Serving(this, eventArgs);
}
}
#endregion
#endregion
#region Methods
/// <summary>
/// Called when [approved].
/// </summary>
/// <param name="comment">The comment.</param>
internal static void OnApproved(Comment comment)
{
if (Approved != null)
{
Approved(comment, EventArgs.Empty);
}
}
/// <summary>
/// Called when [approving].
/// </summary>
/// <param name="comment">The comment.</param>
/// <param name="e">The <see cref="System.ComponentModel.CancelEventArgs"/> instance containing the event data.</param>
internal static void OnApproving(Comment comment, CancelEventArgs e)
{
if (Approving != null)
{
Approving(comment, e);
}
}
/// <summary>
/// Called when [disapproved].
/// </summary>
/// <param name="comment">The comment.</param>
internal static void OnDisapproved(Comment comment)
{
if (Disapproved != null)
{
Disapproved(comment, EventArgs.Empty);
}
}
/// <summary>
/// Called when [disapproving].
/// </summary>
/// <param name="comment">The comment.</param>
/// <param name="e">The <see cref="System.ComponentModel.CancelEventArgs"/> instance containing the event data.</param>
internal static void OnDisapproving(Comment comment, CancelEventArgs e)
{
if (Disapproving != null)
{
Disapproving(comment, e);
}
}
#endregion
}
}