public async Task CreateAsync(Post model)
{
using (var db = new CmsContext())
{
var post = db.Posts.SingleOrDefault(p => p.Id == model.Id);
if (post != null)
{
throw new ArgumentException("A post with the id of" + model.Id + "already exists");
}
db.Posts.Add(model);
await db.SaveChangesAsync();
}
}
public async Task DeleteAsync(string id)
{
using (var db = new CmsContext())
{
var post = db.Posts.FirstOrDefault(p => p.Id == id);
if (post == null)
{
throw new KeyNotFoundException("The post with the id" + id + " doesnot exist");
}
db.Posts.Remove(post);
await db.SaveChangesAsync();
}
}
public async Task EditAsync(string id, Post updatedItem)
{
using (var db = new CmsContext())
{
var post = db.Posts.SingleOrDefault(p => p.Id == id);
if (post == null)
{
throw new KeyNotFoundException("A post with the id of" + id
+ "does not exist in the data store.");
}
post.Id = updatedItem.Id;
post.Title = updatedItem.Title;
post.Content = updatedItem.Content;
post.Published = updatedItem.Published;
post.Tags = updatedItem.Tags;
await db.SaveChangesAsync();
}
}
public async Task EditAsync(string existingTag, string newTag)
{
using (var db = new CmsContext())
{
var posts = db.Posts.Where(post => post.CombinedTags.Contains(existingTag)).ToList();
posts = posts.Where(post =>
post.Tags.Contains(existingTag, StringComparer.CurrentCultureIgnoreCase)).ToList();
if (!posts.Any())
{
throw new KeyNotFoundException("The tag " + existingTag + "does not exist");
}
foreach (var post in posts)
{
post.Tags.Remove(existingTag);
post.Tags.Add(newTag);
}
await db.SaveChangesAsync();
}
}
