/// <summary>
/// 修改Blog，会自动修正Blog的数据
/// </summary>
/// <param name="newBlog">修改完成的Blog</param>
/// /// <param name="blog">要修改的Blog</param>
/// <param name="tags"></param>
/// <returns></returns>
public void EditBlog(Blog newBlog, Blog blog, IList <Tag> tags, TagApplication tagApplication, BlogTagsApplication blogTagsApplication)
{
//先调用ValidateAndCorrectSubmit验证更合理
newBlog.Date = DateTime.Now;
//进行事务添加
blogTagsApplication.DeleteByBlogId(blog.BlogId);
//if (!blogTagsApplication.Commit())
//{
// throw new Exception("删除原Blog和标签关系异常");
//}
IList <BlogTags> blogTags = blogTagsApplication.UpdateBlogTags(blog, tags, tagApplication);
//对齐Blog对象
blog.BTitle = newBlog.BTitle;
blog.BContext = newBlog.BContext;
blog.BSummary = newBlog.BSummary;
blog.BSummaryTrim = newBlog.BSummaryTrim;
blog.BHTML = newBlog.BHTML;
blog.BScript = newBlog.BScript;
blog.BReprint = newBlog.BReprint;
//blog.BPV = newBlog.BPV;
//blog.Likes = newBlog.Likes;
blog.BName = newBlog.BName;
blog.BLastCommentUser = newBlog.BLastCommentUser;
blog.BLastComment = newBlog.BLastComment;
blog.BIsTop = newBlog.BIsTop;
blog.BImgTrim = newBlog.BImgTrim;
blog.BImg = newBlog.BImg;
//blog.BComment = newBlog.BComment;
//blog.BClick = newBlog.BClick;
blog.ClassifyId = newBlog.ClassifyId;
blog.BName = newBlog.BName;
Update(blog);
blogTagsApplication.AddLists(blogTags);
}
/// <summary>
/// 将Blog的Tag添加到数据库，并生成BlogTags（Blog和Tag关系表）的数组（尚未提交到数据库，需要自己提交，并且关系表中的对象(Blog/Tag)都为null）
/// </summary>
/// <param name="blog"></param>
/// <param name="tags">Blog对应的标签对象</param>
/// <returns></returns>
public IList <BlogTags> UpdateBlogTags(Blog blog, IList <Tag> tags, TagApplication tagApplication)
{
var selectTagIds = tags.Where(tag => !string.IsNullOrWhiteSpace(tag.TagId)).Select(m => m.TagId); //得到要查询的Tag name列表（把为null的tag的tagId过滤掉，因为前端传递过来的tag，如果是新增的，则为null），然后进行数据库查询
IEnumerable <Tag> existTags = tagApplication.FindListByTagIdList(selectTagIds.ToArray()); //从数据库中查询到已存在的Tag
IList <Tag> addTags = tags.Where(tag =>
{
//前端传递过来，新增的tag的tagId都是null，同时去数据库中检测，如果发现有新增的项数据库中并没有
if (string.IsNullOrWhiteSpace(tag.TagId) && !existTags.Any(t => t.TagName == tag.TagName))
{
tag.TagId = SaidCommon.GUID;
tag.Count = 1;//tag应该由中间表记录和Blog的关系，而不应该直接查询Tag
tag.Date = DateTime.Now;
return(true);
}
return(false);
}).ToList();
if (addTags.Count() > 0)
{
//if (tagApplication.AddList(addTags) < 1)
//{
// throw new Exception("新增Tag失败");
//}
tagApplication.AddList(addTags);
if (!tagApplication.Commit())
{
throw new Exception("新增Tag失败");
}
}
if (existTags != null && existTags.Count() > 0 && addTags.Count() > 0)
{
tags = existTags.Concat(addTags).ToList();//Concat参考：http://www.cnblogs.com/heyuquan/p/Linq-to-Objects.html
}
else if (addTags.Count() > 0)
{
tags = addTags;
}
else if (existTags.Count() > 0)
{
tags = existTags.ToList();
}
//这里应该是调用BlogTagsApplication的方法
//新增Tag成功，生成BlogTags
var blogTags = new List <BlogTags>();
foreach (var item in tags)
{
blogTags.Add(new BlogTags
{
BlogId = blog.BlogId,
TagId = item.TagId,
Date = DateTime.Now,
BlogTagsId = SaidCommon.GUID
});
}
return(blogTags);
}
/// <summary>
/// 添加Blog，会自动修正Blog的数据，新增blogId
/// </summary>
/// <param name="blog"></param>
/// <param name="tags"></param>
/// <returns></returns>
public void AddBlog(Blog blog, IList <Tag> tags, BlogTagsApplication blogTagsApplication, TagApplication tagApplication)
{
//先调用ValidateAndCorrectSubmit验证更合理
blog.BlogId = string.IsNullOrWhiteSpace(blog.BName) ? FileCommon.CreateFileNameByTime() : blog.BName;
blog.Date = DateTime.Now;
IList <BlogTags> blogTags = blogTagsApplication.UpdateBlogTags(blog, tags, tagApplication);
Add(blog);
if (!Commit())
{
throw new Exception("新增Blog异常");
}
//新增BlogTags完毕,新增Blog
blogTagsApplication.AddLists(blogTags);
}