Samples/MindDump/Castle.Applications.MindDump/Services/BlogMaintenanceService.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 BlogMaintenanceService
  25         {
  26                 private PostDao _postDao;
  27                 private BlogDao _blogDao;
  28                 private AuthorDao _authorDao;
  29
  30                 public BlogMaintenanceService(AuthorDao authorDao, BlogDao blogDao, PostDao postDao)
  31                 {
  32                         _authorDao = authorDao;
  33                         _blogDao = blogDao;
  34                         _postDao = postDao;
  35                 }
  36
  37                 public Post CreateNewPost(Blog blog, Post post)
  38                 {
  39                         post.Blog = blog;
  40
  41                         try
  42                         {
  43                                 return _postDao.Create(post);
  44                         }
  45                         catch(Exception ex)
  46                         {
  47                                 throw new ApplicationException("Could not create post", ex);
  48                         }
  49                 }
  50
  51                 public void UpdatePost(Blog blog, long postId, Post post)
  52                 {
  53                         Post originalPost = ObtainPost(blog, postId);
  54
  55                         originalPost.Title = post.Title;
  56                         originalPost.Contents = post.Contents;
  57
  58                         try
  59                         {
  60                                 _postDao.Update(originalPost);
  61                         }
  62                         catch(Exception ex)
  63                         {
  64                                 throw new ApplicationException("Could not update post", ex);
  65                         }
  66                 }
  67
  68                 public Post ObtainPost( Blog blog, long postId )
  69                 {
  70                         try
  71                         {
  72                                 Post post = _postDao.Find(postId);
  73
  74                                 if (post != null)
  75                                 {
  76                                         if (post.Blog.Id != blog.Id)
  77                                         {
  78                                                 throw new ApplicationException("The post requested belongs " +
  79                                                         "to a different blog");
  80                                         }
  81                                 }
  82
  83                                 return post;
  84                         }
  85                         catch(ApplicationException ex)
  86                         {
  87                                 throw ex;
  88                         }
  89                         catch(Exception ex)
  90                         {
  91                                 throw new ApplicationException("Could not find post", ex);
  92                         }
  93                 }
  94
  95                 public IList ObtainPosts(Blog blog)
  96                 {
  97                         return _postDao.Find(blog);
  98                 }
  99
 100                 public Blog ObtainBlogByAuthorName(string authorName)
 101                 {
 102                         Author author = _authorDao.Find(authorName);
 103
 104                         if (author == null)
 105                         {
 106                                 return null;
 107                         }
 108
 109                         return author.Blogs[0] as Blog;
 110                 }
 111         }
 112 }