private void UpdateIndex(FullPost post)
{
Field name = new Field("Name", post.Name, Field.Store.YES, Field.Index.NOT_ANALYZED);
Field title = new Field("Title", post.Title, Field.Store.NO, Field.Index.ANALYZED);
Field content = new Field("Content", post.Content, Field.Store.NO, Field.Index.ANALYZED);
Field tags = new Field("Tags", String.Join(" ", post.Tags), Field.Store.NO, Field.Index.ANALYZED);
Document document = new Document();
document.Add(name);
document.Add(title);
document.Add(content);
document.Add(tags);
Indexer.UpdateDocument(new Term("Name", post.Name), document);
Indexer.Flush(true, true, true);
Indexer.Optimize();
}
private void UpdatePost(string name, FullPost post)
{
string filename = Server.MapPath("~/Content/" + name + ".md");
string[] lines = System.IO.File.ReadAllLines(filename);
post.Name = name;
post.Title = lines[0].Split(':')[1].Trim();
post.PostDate = DateTime.ParseExact(lines[2].Split(':')[1].Trim(), "yyyy-MM-dd", null);
post.UpdateDate = DateTime.Today;
post.Tags = lines[1].Split(':')[1].Split(',').Select(t => t.Trim()).ToArray();
StringBuilder excerpt = new StringBuilder();
StringBuilder content = new StringBuilder();
bool isExcerptRecorded = false;
for (int i = 3; i < lines.Length; i++) {
string line = lines[i];
if (line.Trim() == "<!-- more -->") {
isExcerptRecorded = true;
}
content.AppendLine(line);
if (!isExcerptRecorded) {
excerpt.AppendLine(line);
}
}
post.Excerpt = excerpt.ToString().Trim();
post.Content = content.ToString().Trim();
}
public void Update(string name)
{
FullPost post = DbSession.Get<FullPost>(name);
HashSet<string> storedTags = new HashSet<string>();
if (post == null) {
post = new FullPost();
}
else {
storedTags.UnionWith(post.Tags);
}
UpdatePost(name, post);
// 有以前的tag列表说明数据库里有这一篇，使用更新
if (storedTags.Count > 0) {
DbSession.Update(post);
}
else {
DbSession.Save(post);
}
// 抽取tag的区别
HashSet<string> currentTags = new HashSet<string>(post.Tags);
UpdateTags(currentTags, storedTags);
// 更新全文索引
UpdateIndex(post);
}