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namespace BlogEngine.Core
{
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Net.Mail;
using System.Text;
using System.Web;
using BlogEngine.Core.Data.Models;
using BlogEngine.Core.Providers;
/// <summary>
/// A post is an entry on the blog - a blog post.
/// </summary>
[Serializable]
public class Post : BusinessBase<Post, Guid>, IComparable<Post>, IPublishable
{
#region Constants and Fields
/// <summary>
/// The sync root.
/// </summary>
private static readonly object SyncRoot = new object();
/// <summary>
/// The categories.
/// </summary>
private readonly StateList<Category> categories;
/// <summary>
/// All comments, including deleted
/// </summary>
private readonly List<Comment> allcomments;
/// <summary>
/// The notification emails.
/// </summary>
private readonly StateList<string> notificationEmails;
/// <summary>
/// The post tags.
/// </summary>
private readonly StateList<string> tags;
/// <summary>
/// The posts.
/// </summary>
private static Dictionary<Guid, List<Post>> posts = new Dictionary<Guid, List<Post>>();
/// <summary>
/// The deleted posts.
/// </summary>
private static Dictionary<Guid, List<Post>> deletedposts = new Dictionary<Guid, List<Post>>();
/// <summary>
/// The author.
/// </summary>
private string author;
/// <summary>
/// The content.
/// </summary>
private string content;
/// <summary>
/// The description.
/// </summary>
private string description;
/// <summary>
/// Whether the post is comments enabled.
/// </summary>
private bool hasCommentsEnabled;
/// <summary>
/// The nested comments.
/// </summary>
private List<Comment> nestedComments;
/// <summary>
/// Whether the post is published.
/// </summary>
private bool isPublished;
/// <summary>
/// Whether the post is deleted.
/// </summary>
private bool isDeleted;
/// <summary>
/// The raters.
/// </summary>
private int raters;
/// <summary>
/// The rating.
/// </summary>
private float rating;
/// <summary>
/// The slug of the post.
/// </summary>
private string slug;
/// <summary>
/// The title.
/// </summary>
private string title;
#endregion
#region Constructors and Destructors
/// <summary>
/// Initializes a new instance of the <see cref = "Post" /> class.
/// The default contstructor assign default values.
/// </summary>
public Post()
{
this.Id = Guid.NewGuid();
this.allcomments = new List<Comment>();
this.categories = new StateList<Category>();
this.tags = new StateList<string>();
this.notificationEmails = new StateList<string>();
this.DateCreated = new DateTime();
this.isPublished = true;
this.hasCommentsEnabled = true;
}
static Post()
{
Blog.Saved += (s, e) =>
{
if (e.Action == SaveAction.Delete)
{
Blog blog = s as Blog;
if (blog != null)
{
RefreshPostLists(blog);
}
}
};
}
#endregion
#region Events
/// <summary>
/// Occurs before a new comment is added.
/// </summary>
public static event EventHandler<CancelEventArgs> AddingComment;
/// <summary>
/// Occurs when a comment is added.
/// </summary>
public static event EventHandler<EventArgs> CommentAdded;
/// <summary>
/// Occurs when a comment has been removed.
/// </summary>
public static event EventHandler<EventArgs> CommentRemoved;
/// <summary>
/// Occurs when a comment has been purged.
/// </summary>
public static event EventHandler<EventArgs> CommentPurged;
/// <summary>
/// Occurs when a comment has been restored.
/// </summary>
public static event EventHandler<EventArgs> CommentRestored;
/// <summary>
/// Occurs when a comment is updated.
/// </summary>
public static event EventHandler<EventArgs> CommentUpdated;
/// <summary>
/// Occurs when a visitor rates the post.
/// </summary>
public static event EventHandler<EventArgs> Rated;
/// <summary>
/// Occurs before comment is removed.
/// </summary>
public static event EventHandler<CancelEventArgs> RemovingComment;
/// <summary>
/// Occurs before comment is purged.
/// </summary>
public static event EventHandler<CancelEventArgs> PurgingComment;
/// <summary>
/// Occurs before comment is restored.
/// </summary>
public static event EventHandler<CancelEventArgs> RestoringComment;
/// <summary>
/// Occurs when the post is being served to the output stream.
/// </summary>
public static event EventHandler<ServingEventArgs> Serving;
/// <summary>
/// Occurs when the post is being published.
/// </summary>
public static event EventHandler<CancelEventArgs> Publishing;
/// <summary>
/// Occurs when a post is published.
/// </summary>
public static event EventHandler<EventArgs> Published;
/// <summary>
/// Occurs before a new comment is updated.
/// </summary>
public static event EventHandler<CancelEventArgs> UpdatingComment;
#endregion
#region Post Properties
/// <summary>
/// Gets a sorted collection of all undeleted posts in the blog.
/// Sorted by date.
/// </summary>
public static List<Post> Posts
{
get
{
Blog blog = Blog.CurrentInstance;
List<Post> blogPosts;
if (!posts.TryGetValue(blog.BlogId, out blogPosts))
{
lock (SyncRoot)
{
if (!posts.TryGetValue(blog.BlogId, out blogPosts))
{
posts[blog.Id] = blogPosts = BlogService.FillPosts().Where(p => p.IsDeleted == false).ToList();
blogPosts.TrimExcess();
AddRelations(blogPosts);
}
}
}
return blogPosts;
}
}
/// <summary>
/// Gets a sorted collection of all undeleted posts across all blogs.
/// Sorted by date.
/// </summary>
public static List<Post> AllBlogPosts
{
get
{
List<Blog> blogs = Blog.Blogs.Where(b => b.IsActive).ToList();
Guid originalBlogInstanceIdOverride = Blog.InstanceIdOverride;
List<Post> postsAcrossAllBlogs = new List<Post>();
// Posts are not loaded for a blog instance until that blog
// instance is first accessed. For blog instances where the
// posts have not yet been loaded, using InstanceIdOverride to
// temporarily switch the blog CurrentInstance blog so the Posts
// for that blog instance can be loaded.
//
for (int i = 0; i < blogs.Count; i++)
{
List<Post> blogPosts;
if (!posts.TryGetValue(blogs[i].Id, out blogPosts))
{
// temporarily override the Current BlogId to the
// blog Id we need posts to be loaded for.
Blog.InstanceIdOverride = blogs[i].Id;
blogPosts = Posts;
Blog.InstanceIdOverride = originalBlogInstanceIdOverride;
}
postsAcrossAllBlogs.AddRange(blogPosts);
}
postsAcrossAllBlogs.Sort();
// do not call AddRelations(). that will change the Next/Previous properties
// to point to posts in other blogs, which leads to the Next / Previous
// posts pointing to posts in other blog instances when viewing a single post
// (in post.aspx). If Next/Previous is needed for the posts returned
// here in AllBlogPosts, would be better to create new properties
// (e.g. AllBlogsNextPost, AllBlogsPreviousPost).
// AddRelations(postsAcrossAllBlogs);
return postsAcrossAllBlogs;
}
}
/// <summary>
/// Gets a sorted collection of all undeleted posts, taking into account the
/// current blog instance's Site Aggregation status in determining if posts
/// from just the current instance or all instances should be returned.
/// Sorted by date.
/// </summary>
/// <remarks>
/// This logic could be put into the normal 'Posts' property, however
/// there are times when a Site Aggregation blog instance may just need
/// its own posts. So ApplicablePosts can be called when data across
/// all blog instances may be needed, and Posts can be called when data
/// for just the current blog instance is needed.
/// </remarks>
public static List<Post> ApplicablePosts
{
get
{
if (Blog.CurrentInstance.IsSiteAggregation)
return AllBlogPosts;
else
return Posts;
}
}
/// <summary>
/// Gets a sorted collection of all deleted posts in the blog.
/// Sorted by date.
/// </summary>
public static List<Post> DeletedPosts
{
get
{
Blog blog = Blog.CurrentInstance;
List<Post> blogPosts;
if (!deletedposts.TryGetValue(blog.Id, out blogPosts))
{
lock (SyncRoot)
{
if (!deletedposts.TryGetValue(blog.Id, out blogPosts))
{
blogPosts = BlogService.FillPosts().Where(p => p.IsDeleted == true).ToList();
deletedposts[blog.Id] = blogPosts;
}
}
}
return blogPosts;
}
}
/// <summary>
/// Gets or sets the Author or the post.
/// </summary>
public string Author
{
get
{
return this.author;
}
set
{
base.SetValue("Author", value, ref this.author);
}
}
/// <summary>
/// Gets AuthorProfile.
/// </summary>
public AuthorProfile AuthorProfile
{
get
{
return AuthorProfile.GetProfile(this.Author);
}
}
/// <summary>
/// Gets an unsorted List of categories.
/// </summary>
public StateList<Category> Categories
{
get
{
return this.categories;
}
}
/// <summary>
/// Gets or sets the Content or the post.
/// </summary>
public string Content
{
get
{
return this.content;
}
set
{
base.SetValue("Content", value, ref this.content);
// This is commented out only because I can't find any reference to
// this cache item anywhere in the project. So it seems pretty obscure
// if it's supposed to be used by plugins or something else.
//if (base.SetValue("Content", value, ref this.content))
//{
// Blog.CurrentInstance.Cache.Remove("content_" + this.Id);
//}
}
}
/// <summary>
/// Gets or sets the Description or the post.
/// </summary>
public string Description
{
get
{
return this.description;
}
set
{
base.SetValue("Description", value, ref this.description);
}
}
/// <summary>
/// Gets if the Post have been changed.
/// </summary>
public override bool IsChanged
{
get
{
if (base.IsChanged)
{
return true;
}
if (this.Categories.IsChanged || this.Tags.IsChanged || this.NotificationEmails.IsChanged)
{
return true;
}
return false;
}
}
/// <summary>
/// Gets the next post relative to this one based on time.
/// <remarks>
/// If this post is the newest, then it returns null.
/// </remarks>
/// </summary>
public Post Next { get; private set; }
/// <summary>
/// Gets a collection of email addresses that is signed up for
/// comment notification on the specific post.
/// </summary>
public StateList<string> NotificationEmails
{
get
{
return this.notificationEmails;
}
}
/// <summary>
/// Gets the absolute permanent link to the post.
/// </summary>
public Uri PermaLink
{
get
{
return new Uri($"{Blog.AbsoluteWebRoot}post.aspx?id={Id}");
//return new Uri(string.Format("{0}post/{1}", this.Blog.AbsoluteWebRoot, this.Slug));
}
}
/// <summary>
/// Gets the previous post relative to this one based on time.
/// <remarks>
/// If this post is the oldest, then it returns null.
/// </remarks>
/// </summary>
public Post Previous { get; private set; }
/// <summary>
/// Gets or sets a value indicating whether or not the post is published.
/// </summary>
public bool IsPublished
{
get
{
return this.isPublished;
}
set
{
base.SetValue("IsPublished", value, ref this.isPublished);
}
}
/// <summary>
/// Gets or sets a value indicating whether or not the post is deleted.
/// </summary>
public bool IsDeleted
{
get
{
return this.isDeleted;
}
set
{
base.SetValue("IsDeleted", value, ref this.isDeleted);
}
}
/// <summary>
/// Gets or sets the number of raters or the object.
/// </summary>
public int Raters
{
get
{
return this.raters;
}
set
{
base.SetValue("Raters", value, ref this.raters);
}
}
/// <summary>
/// Gets or sets the rating or the post.
/// </summary>
public float Rating
{
get
{
return this.rating;
}
set
{
base.SetValue("Rating", value, ref this.rating);
}
}
/// <summary>
/// Gets the absolute link to the post.
/// </summary>
public Uri AbsoluteLink
{
get
{
return new Uri(this.Blog.AbsoluteWebRootAuthority + this.RelativeLink);
}
}
/// <summary>
/// Gets a relative-to-the-site-root path to the post.
/// Only for in-site use.
/// </summary>
public string RelativeLink
{
get
{
// taking into account aggregated posts
var settings = BlogSettings.GetInstanceSettings(Blog);
var ext = string.IsNullOrEmpty(BlogConfig.FileExtension) ? ".aspx" : BlogConfig.FileExtension;
var theslug = Utils.RemoveIllegalCharacters(this.Slug);
if (!settings.RemoveExtensionsFromUrls)
theslug += ext;
var BlogUrl = "";
if (this.BlogId != Blog.CurrentInstance.Id)
{
// point it to child blog
BlogUrl = this.Blog.Name + "/";
}
return settings.TimeStampPostLinks
? string.Format("{0}{1}post/{2}{3}", Blog.RelativeWebRoot, BlogUrl, DateCreated.ToString("yyyy/MM/dd/", CultureInfo.InvariantCulture), theslug)
: string.Format("{0}{1}post/{2}", Utils.RelativeWebRoot, BlogUrl, theslug);
}
}
/// <summary>
/// Returns a relative link if possible if the hostname of this blog instance matches the
/// hostname of the site aggregation blog. If the hostname is different, then the
/// absolute link is returned.
/// </summary>
public string RelativeOrAbsoluteLink
{
get
{
return Blog.DoesHostnameDifferFromSiteAggregationBlog ? AbsoluteLink.ToString() : RelativeLink;
}
}
/// <summary>
/// Gets or sets the Slug of the Post.
/// A Slug is the relative URL used by the posts.
/// </summary>
public string Slug
{
get
{
return string.IsNullOrEmpty(this.slug) ? GetUniqueSlug(this.title, this.Id) : this.slug;
}
set
{
base.SetValue("Slug", value, ref this.slug);
}
}
/// <summary>
/// Gets an unsorted collection of tags.
/// </summary>
public StateList<string> Tags
{
get
{
return this.tags;
}
}
/// <summary>
/// Gets or sets the Title or the post.
/// </summary>
public string Title
{
get
{
return this.title;
}
set
{
base.SetValue("Title", value, ref this.title);
}
}
/// <summary>
/// Gets the trackback link to the post.
/// </summary>
public Uri TrackbackLink
{
get
{
return new Uri($"{Blog.AbsoluteWebRoot}trackback.axd?id={Id}");
}
}
/// <summary>
/// Gets a value indicating whether or not the post is visible or not.
/// </summary>
public bool IsVisible
{
get
{
if (this.IsDeleted)
return false;
else if (this.IsPublished && this.DateCreated <= BlogSettings.Instance.FromUtc())
return true;
else if (Security.IsAuthorizedTo(Rights.ViewUnpublishedPosts))
return true;
return false;
}
}
/// <summary>
/// Gets a value indicating whether a post is available to visitors not logged into the blog.
/// </summary>
public bool IsVisibleToPublic
{
get
{
return (this.IsPublished && this.IsDeleted == false &&
this.DateCreated <= BlogSettings.Instance.FromUtc());
}
}
/// <summary>
/// URL of the first image in the post, if any
/// </summary>
public string FirstImgSrc
{
get
{
int idx = Content.IndexOf("<img src=");
if (idx > 0)
{
try
{
idx = idx + 10;
var idxEnd = Content.IndexOf("\"", idx);
if (idxEnd > idx)
{
var len = idxEnd - idx;
return Content.Substring(idx, len);
}
}
catch (Exception) { }
}
return "";
}
}
#endregion
#region Comment Properties
/// <summary>
/// Gets a Collection of All Comments for the post
/// </summary>
public List<Comment> Comments
{
get
{
return this.AllComments.FindAll(c => !c.IsDeleted);
}
}
/// <summary>
/// Gets a Collection of All Comments for the post
/// </summary>
public List<Comment> AllComments
{
get
{
return this.allcomments;
}
}
/// <summary>
/// Gets a collection of Approved comments for the post sorted by date.
/// When moderation is enabled, unapproved comments go to pending.
/// Whith moderation off, they shown as approved.
/// </summary>
public List<Comment> ApprovedComments
{
get
{
if (BlogSettings.Instance.EnableCommentsModeration)
{
return this.Comments.FindAll(c => c.IsApproved && !c.IsSpam && !c.IsPingbackOrTrackback);
}
else
{
return this.Comments.FindAll(c => !c.IsSpam && !c.IsPingbackOrTrackback);
}
}
}
/// <summary>
/// Gets a collection of comments waiting for approval for the post, sorted by date
/// excluding comments rejected as spam
/// </summary>
public List<Comment> NotApprovedComments
{
get
{
return this.Comments.FindAll(c => !c.IsApproved && !c.IsSpam && !c.IsPingbackOrTrackback);
}
}
/// <summary>
/// Gets a collection of pingbacks and trackbacks for the post, sorted by date
/// </summary>
public List<Comment> Pingbacks
{
get
{
return this.Comments.FindAll(c => c.IsApproved && !c.IsSpam && c.IsPingbackOrTrackback);
}
}
/// <summary>
/// Gets a collection of comments marked as spam for the post, sorted by date.
/// </summary>
public List<Comment> SpamComments
{
get
{
return this.Comments.FindAll(c => c.IsSpam && !c.IsDeleted);
}
}
/// <summary>
/// Gets a collection of comments marked as deleted for the post, sorted by date.
/// </summary>
public List<Comment> DeletedComments
{
get
{
return this.allcomments.FindAll(c => c.IsDeleted);
}
}
/// <summary>
/// Gets a collection of the comments that are nested as replies
/// </summary>
public List<Comment> NestedComments
{
get
{
if (this.nestedComments == null)
{
this.CreateNestedComments();
}
return this.nestedComments;
}
}
/// <summary>
/// Gets or sets a value indicating whether this instance has comments enabled.
/// </summary>
/// <value>
/// <c>true</c> if this instance has comments enabled; otherwise, <c>false</c>.
/// </value>
public bool HasCommentsEnabled
{
get
{
return this.hasCommentsEnabled;
}
set
{
base.SetValue("HasCommentsEnabled", value, ref this.hasCommentsEnabled);
}
}
#endregion
#region Post Public Methods
/// <summary>
/// Gets whether the current user can publish this post.
/// </summary>
/// <param name="author">The author of the post without needing to assign it to the Author property.</param>
/// <returns></returns>
public bool CanPublish(string author)
{
bool isOwnPost = Security.CurrentUser.Identity.Name.Equals(author, StringComparison.OrdinalIgnoreCase);
if (isOwnPost && !Security.IsAuthorizedTo(Rights.PublishOwnPosts))
{
return false;
}
else if (!isOwnPost && !Security.IsAuthorizedTo(Rights.PublishOtherUsersPosts))
{
return false;
}
return true;
}
/// <summary>
/// Gets whether or not the current user owns this post.
/// </summary>
/// <returns></returns>
public override bool CurrentUserOwns
{
get
{
return Security.CurrentUser.Identity.Name.Equals(this.Author, StringComparison.OrdinalIgnoreCase);
}
}
/// <summary>
/// Gets whether the current user can delete this post.
/// </summary>
/// <returns></returns>
public override bool CanUserDelete
{
get
{
if (CurrentUserOwns && Security.IsAuthorizedTo(Rights.DeleteOwnPosts))
return true;
else if (!CurrentUserOwns && Security.IsAuthorizedTo(Rights.DeleteOtherUsersPosts))
return true;
return false;
}
}
/// <summary>
/// Gets whether the current user can edit this post.
/// </summary>
/// <returns></returns>
public override bool CanUserEdit
{
get
{
if (CurrentUserOwns && Security.IsAuthorizedTo(Rights.EditOwnPosts))
return true;
else if (!CurrentUserOwns && Security.IsAuthorizedTo(Rights.EditOtherUsersPosts))
return true;
return false;
}
}
/// <summary>
/// Returns a post based on the specified id.
/// </summary>
/// <param name="id">
/// The post id.
/// </param>
/// <returns>
/// The selected post.
/// </returns>
public static Post GetPost(Guid id)
{
return Posts.Find(p => p.Id == id);
}
/// <summary>
/// Returns all posts written by the specified author.
/// </summary>
/// <param name="author">
/// The author.
/// </param>
/// <returns>
/// A list of Post.
/// </returns>
public static List<Post> GetPostsByAuthor(string author)
{
var legalAuthor = Utils.RemoveIllegalCharacters(author);
var list = ApplicablePosts.FindAll(
p =>
{
var legalTitle = Utils.RemoveIllegalCharacters(p.Author);
return legalAuthor.Equals(legalTitle, StringComparison.OrdinalIgnoreCase);
});
return list;
}
/// <summary>
/// Get blog by author
/// </summary>
/// <param name="author">Post author</param>
/// <returns>Blog if author wrote any posts there</returns>
public static Blog GetBlogByAuthor(string author)
{
var legalAuthor = Utils.RemoveIllegalCharacters(author);
var post = ApplicablePosts.FirstOrDefault(
p =>
{
var legalTitle = Utils.RemoveIllegalCharacters(p.Author);
return legalAuthor.Equals(legalTitle, StringComparison.OrdinalIgnoreCase);
});
return post == null ? null : post.Blog;
}
/// <summary>
/// Returns all posts in the specified category
/// </summary>
/// <param name="categoryId">
/// The category Id.
/// </param>
/// <returns>
/// A list of Post.
/// </returns>
public static List<Post> GetPostsByCategory(Guid categoryId)
{
var cat = Category.GetCategory(categoryId, Blog.CurrentInstance.IsSiteAggregation);
return GetPostsByCategory(cat);
}
/// <summary>
/// Returns all posts in the specified category
/// </summary>
/// <param name="cat">Category objuect</param>
/// <returns>A list of posts</returns>
public static List<Post> GetPostsByCategory(Category cat)
{
if (cat == null)
{
return null;
}
var col = new List<Post>();