public IHttpActionResult Update(PostDataModel postData)
{
if (postData == null || postData.Id == null)
{
return this.BadRequest("You must provide a valid post id and a new content.");
}
var post = this.data.Posts.GetById(postData.Id);
if (post == null)
{
return this.BadRequest("Invalid post id.");
}
if (!string.IsNullOrWhiteSpace(postData.Content))
{
post.Content = postData.Content;
}
if (!string.IsNullOrWhiteSpace(postData.Tags))
{
var newTags = this.GetTagsFromDataModel(postData);
post.Tags = newTags;
}
this.data.SaveChanges();
return this.Ok();
}
private ICollection<Tag> GetTagsFromDataModel(PostDataModel postData)
{
// get the tags from the string
var tags = new List<Tag>();
if (!string.IsNullOrWhiteSpace(postData.Tags))
{
tags = postData.Tags.Split(',').Select(t => new Tag { Name = t.Trim() }).ToList();
}
// add the new tags to the database
for (var i = 0; i < tags.Count; i++)
{
var currentTag = tags[i];
var existingTag = this.data.Tags.Find(t => t.Name == currentTag.Name).FirstOrDefault();
if (existingTag != null)
{
tags[i] = existingTag;
}
else
{
this.data.Tags.Add(tags[i]);
}
}
return tags;
}
public static Post ToPost(PostDataModel postDataModel)
{
return(new Post
{
Title = postDataModel.Title,
Content = postDataModel.Content,
UserId = postDataModel.AuthorId.Value
});
}
public static Post ToPost(PostDataModel postDataModel)
{
return new Post
{
Title = postDataModel.Title,
Content = postDataModel.Content,
UserId = postDataModel.AuthorId.Value
};
}
public IHttpActionResult Add(PostDataModel postData)
{
if (postData == null || postData.AuthorId == null || string.IsNullOrWhiteSpace(postData.Content))
{
return this.BadRequest("You must provide post content and author.");
}
var newPost = PostDataModel.ToPost(postData);
if (!string.IsNullOrWhiteSpace(postData.Tags))
{
var tags = this.GetTagsFromDataModel(postData);
newPost.Tags = tags;
}
this.data.Posts.Add(newPost);
this.data.SaveChanges();
return this.Ok();
}
