public List<Tag> GetTags(Nav nav)
{
using (var db = new BlogDbContext())
{
var tags = new List<Tag>();
foreach (var t in db.TagEntities.Where(t=>t.NavId == nav.NavId))
{
var tag = new Tag(nav)
{
TagId = t.TagId,
TagName = WebHelper.UrlDecode(t.Name),
Description = t.Description,
PostCount = t.PostCount,
};
tags.Add(tag);
}
return tags;
}
}
/// <summary>
///
/// </summary>
/// <param name="tag"></param>
public void UpdateTag(Tag tag)
{
using (var db = new BlogDbContext())
{
// check if a tag with this name exists in this nav
var ent = db.TagEntities.FirstOrDefault(n => n.Name.ToLower() == tag.TagName.ToLower() && n.NavId == tag.Nav.NavId);
if (ent != null)
throw new SiteException("Tag exists.");
// find the current tag
ent = db.TagEntities.FirstOrDefault(n => n.TagId == tag.TagId);
if (ent == null)
return;
// update it
ent.Name = tag.TagName;
ent.Description = tag.Description;
// save it
db.SaveChanges();
}
}
/// <summary>
/// Adds a tag.
/// </summary>
/// <param name="tag"></param>
/// <returns></returns>
/// <exception cref="BlogException">Throw if already exists</exception>
public int AddTag(Tag tag)
{
using (var db = new BlogDbContext())
{
if (db.TagEntities.FirstOrDefault(n => n.Name.ToLower() == tag.TagName.ToLower()) != null)
throw new SiteException("Msg_Tag_Exists");
var ent = new TagEntity();
ent.Name = tag.TagName;
ent.Description = tag.Description;
ent.NavId = tag.Nav.NavId;
db.TagEntities.Add(ent);
db.SaveChanges();
return ent.TagId;
}
}
public void UpdateTag(Tag tag)
{
throw new NotImplementedException();
}
public int AddTag(Tag tag)
{
tagList.Add(tag);
return tagList.Count;
}
/// <summary>
/// Returns a list of Tag object given a comma delimited tag string.
/// If the string is null or empty, it will return an empty list of Tag object.
/// </summary>
/// <remarks>Used by AddPost and UpdatePost</remarks>
public static List<Tag> GetTagsFromTagsString(Nav nav, string tagString)
{
if (string.IsNullOrWhiteSpace(tagString)) return new List<Tag>();
// convert tagString to List<string>
List<string> tagNames = Tag.SplitTagsString(tagString);
if (tagNames == null || tagNames.Count <= 0)
{
return new List<Tag>();
}
List<Tag> tagList = new List<Tag>();
foreach (var tagName in tagNames)
{
Tag tag = new Tag(nav);
tag.TagName = WebHelper.UrlEncode(Tag.ShortenTagName(tagName));
tagList.Add(tag);
}
return tagList;
}
/// <summary>
/// Updates tag by its id.
/// </summary>
public static void UpdateTag(Nav nav, int tagId, string tagName, string description)
{
if (string.IsNullOrWhiteSpace(tagName)) throw new SiteException("Tag cannot be empty.");
Tag tag = new Tag(nav)
{
TagId = tagId,
TagName = Tag.FormatTagName(tagName),
Description = WebHelper.HtmlEncode(description),
};
Provider.UpdateTag(tag);
SiteCache.ClearRegion(nav.Slug);
//SiteCache.Remove(BlogHelper.GetCacheKey_Posts(nav.Slug, QueryBy.Index)); // posts
//SiteCache.Remove(BlogHelper.GetCacheKey_Tags(nav.Slug));
}
