public async Task <IActionResult> WriteArticle(WriteArticleDto model)
{
//根据model中的category来决定存储的文件路径
var fullPath = Path.Combine(_webHost.WebRootPath,
"md\\" + model.Category + "\\" + model.Id + ".md");
//Console.WriteLine(fullPath);
//如果没有这个md文件，新建一个article存入数据库，写入对应位置
if (!System.IO.File.Exists(fullPath))
{
var article = new Article();
article.Id = model.Id;
article.Title = model.Title;
var catagory = _db.Categories.Where(c => c.CategoryName == model.Category).FirstOrDefault();
article.CategoryId = catagory.Id;
article.Category = catagory;
var user = await _userManager.GetUserAsync(HttpContext.User);
article.Author = user.Email;
article.URL = fullPath;
await _db.AddAsync(article);
await _db.SaveChangesAsync();
}
using (var writer = new StreamWriter(fullPath))
{
await writer.WriteAsync(model.Content);
await writer.FlushAsync();
}
return(View(model));
}
public async Task <string> Publish(WriteArticleDto model)
{
var now = DateTime.Now;
//先根据Model里的id从数据库中找文章，
var article = _db.Articles.Find(model.Id);
//如果没找到，说明这是第一次保存（新建文章且没有按过保存），直接调用上一个方法
if (article == null)
{
await WriteArticle(model);
}
//如果找到了，说明之前保存过了，需要比较两个时间来决定是否再次写入md
else
{
//Console.WriteLine("now:" + now);
//Console.WriteLine("save time:" + model.SaveTime);
TimeSpan saves = new TimeSpan(model.SaveTime.Ticks);
TimeSpan nows = new TimeSpan(now.Ticks);
TimeSpan diff = saves.Subtract(nows).Duration();
//Console.WriteLine(diff.TotalSeconds);
if (diff.TotalSeconds > 5.0)
{
await WriteArticle(model);
}
}
//无论找没找到，都要更新数据库(经过上面的操作，能保证再次根据Id一定能找到文章),并传回一个时间作为savetime
var _article = _db.Articles.Find(model.Id);
_article.HasPublished = true;
_article.PublishTime = now;
_db.Articles.Update(_article);
_db.SaveChanges();
return(now.ToString());
}
public IActionResult WriteArticle(string cateName, string Title)
{
var model = new WriteArticleDto();
//如果title为空，说明是新建文章，返回一个指定id和文章类别的模型
//如果title不为空，则说明是编辑文章，根据title找到文章并返回有效模型
if (!string.IsNullOrEmpty(Title))
{
model = _db.Articles.Where(a => a.Title == Title)
.Select(a => new WriteArticleDto {
Id = a.Id,
Title = a.Title,
Category = cateName
})
.FirstOrDefault();
var fullpath = Path.Combine(_webHost.WebRootPath, "md\\"
+ cateName + "\\" + model.Id + ".md");
var res = new StringBuilder();
using (var reader = new StreamReader(fullpath))
{
string content;
while ((content = reader.ReadLine()) != null)
{
res.Append(content + '\n');
}
}
model.Content = res.ToString();
}
else
{
model.Id = Guid.NewGuid();
model.Category = cateName;
}
ViewBag.Title = "Heyday-编辑文章";
return(View(model));
}
