Samples/MindDump/Castle.Applications.MindDump/Services/BlogService.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.Applications.MindDump.Services
  16 {
  17         using System;
  18         using System.Collections;
  19
  20         using Castle.Applications.MindDump.Dao;
  21         using Castle.Applications.MindDump.Model;
  22
  23
  24         public class BlogService
  25         {
  26                 private PostDao _postDao;
  27                 private BlogDao _blogDao;
  28                 private AuthorDao _authorDao;
  29                 private int _latestBlogsCount = 10;
  30                 private int _latestPostCount = 10;
  31
  32                 public BlogService(AuthorDao authorDao, BlogDao blogDao, PostDao postDao)
  33                 {
  34                         _authorDao = authorDao;
  35                         _blogDao = blogDao;
  36                         _postDao = postDao;
  37                 }
  38
  39                 /// <summary>
  40                 /// This value can be optionally adjusted using
  41                 /// the configuration associated with the kernel
  42                 /// </summary>
  43                 public int LatestBlogsCount
  44                 {
  45                         get { return _latestBlogsCount; }
  46                         set { _latestBlogsCount = value; }
  47                 }
  48
  49                 /// <summary>
  50                 /// This value can be optionally adjusted using
  51                 /// the configuration associated with the kernel
  52                 /// </summary>
  53                 public int LatestPostCount
  54                 {
  55                         get { return _latestPostCount; }
  56                         set { _latestPostCount = value; }
  57                 }
  58
  59                 public Post CreateNewPost(Blog blog, Post post)
  60                 {
  61                         try
  62                         {
  63                                 post.Blog = blog;
  64                                 return _postDao.Create(post);
  65                         }
  66                         catch(Exception ex)
  67                         {
  68                                 throw new ApplicationException("Could not create post", ex);
  69                         }
  70                 }
  71
  72                 public void UpdatePost(Blog blog, long postId, Post post)
  73                 {
  74                         try
  75                         {
  76                                 Post originalPost = ObtainPost(blog, postId);
  77
  78                                 originalPost.Title = post.Title;
  79                                 originalPost.Contents = post.Contents;
  80
  81                                 _postDao.Update(originalPost);
  82                         }
  83                         catch(Exception ex)
  84                         {
  85                                 throw new ApplicationException("Could not update post", ex);
  86                         }
  87                 }
  88
  89                 public Post ObtainPost( Blog blog, long postId )
  90                 {
  91                         try
  92                         {
  93                                 Post post = _postDao.Find(postId);
  94
  95                                 if (post != null)
  96                                 {
  97                                         if (post.Blog.Id != blog.Id)
  98                                         {
  99                                                 throw new ApplicationException("The post requested belongs " +
 100                                                         "to a different blog");
 101                                         }
 102                                 }
 103
 104                                 return post;
 105                         }
 106                         catch(ApplicationException ex)
 107                         {
 108                                 throw ex;
 109                         }
 110                         catch(Exception ex)
 111                         {
 112                                 throw new ApplicationException("Could not find post", ex);
 113                         }
 114                 }
 115
 116                 public IList ObtainPosts(Blog blog)
 117                 {
 118                         return _postDao.Find(blog);
 119                 }
 120
 121                 public Blog ObtainBlogByAuthorName(string authorName)
 122                 {
 123                         Author author = _authorDao.Find(authorName);
 124
 125                         if (author == null)
 126                         {
 127                                 return null;
 128                         }
 129
 130                         return author.Blogs[0] as Blog;
 131                 }
 132
 133                 public IList ObtainLatestBlogs()
 134                 {
 135                         return _blogDao.FindLatest(10);
 136                 }
 137
 138                 public IList ObtainLatestPosts()
 139                 {
 140                         return _postDao.FindLatest(10);
 141                 }
 142         }
 143 }