/// <summary>
/// 【只有这个是异步的】
/// </summary>
/// <returns></returns>
public static Task <ExReaderPlus.Manage.PassageManager.Passage> GetPassage(UserDictionary.Passage passageInfo)
{
ExReaderPlus.PassageIO.PassageIO passageIO = new ExReaderPlus.PassageIO.PassageIO();
var passage = passageIO.ReadPassage(passageInfo);
return(passage);
}
public static ActionPassage FromDBPassage(UserDictionary.Passage psg)
{
return(new ActionPassage()
{
Id = psg.Id, Name = psg.Name, Abstract = psg.Abstract, LastReadTime = psg.LastReadTime
});
}
public async Task OpenFileTest()
{
var passageIO = new PassageIO();
var passageInfo = new UserDictionary.Passage();
var passage = new ExReaderPlus.Manage.PassageManager.Passage();
passageInfo.Id = 2;
passage.Content = "Hello world";
Assert.AreEqual(true, await passageIO.SavaPassage(passage, passageInfo));
}
/// <summary>
/// 删除一篇文章
/// </summary>
/// <param name="str"></param>
public async Task <bool> DeletePassage(UserDictionary.Passage passage)
{
try
{
StorageFolder folder = ApplicationData.Current.LocalFolder;
StorageFile file = await folder.TryGetItemAsync(passage.Id.ToString()) as StorageFile;
await file.DeleteAsync();
return(true);
}
catch (Exception e)
{
return(false);
}
}
/// <summary>
/// 读一篇文章内容
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public async Task <Manage.PassageManager.Passage> ReadPassage(UserDictionary.Passage passage)
{
Manage.PassageManager.Passage p = new Manage.PassageManager.Passage();
StorageFolder folder = ApplicationData.Current.LocalFolder;
StorageFile file = await folder.TryGetItemAsync(passage.Id.ToString()) as StorageFile;
if (file != null)
{
p.Content = await FileIO.ReadTextAsync(file);
p.HeadName = passage.Name;
return(p);
}
else
{
return(null);
}
}
/// <summary>
/// 存一篇文章
/// 传入参数，文章类和文章序列
/// </summary>
/// <param name="passage"></param>
/// <param name="str1"></param>
/// <returns></returns>
public async Task <bool> SavaPassage(Manage.PassageManager.Passage passage, UserDictionary.Passage passageInfo)
{
StorageFolder applicationFolder = ApplicationData.Current.LocalFolder;
try
{
StorageFile saveFile =
await applicationFolder.CreateFileAsync(passageInfo.Id.ToString());
await FileIO.WriteTextAsync(saveFile, passage.Content);
return(true);
}
catch
{
return(false);
}
}
public async Task SaveFileTask()
{
var passageIO = new PassageIO();
var passageInfo = new UserDictionary.Passage();
passageInfo.Id = 1;
var passage = new ExReaderPlus.Manage.PassageManager.Passage();
passage.Content = "Hello world";
await passageIO.SavaPassage(passage, passageInfo);
var passage1 = new ExReaderPlus.Manage.PassageManager.Passage();
passage1 = await passageIO.ReadPassage(passageInfo);
Assert.AreEqual(passage1.Content, "Hello world");
}
/// <summary>
/// 传入参数：文章信息
/// 把一篇文章从书架删除，并且删除缓存文件
/// 成功返回 1
/// 失败返回 0
/// 异常返回 -1
/// </summary>
/// <returns></returns>
public static int DeletePassageInfoAndPassage(UserDictionary.Passage passageInfo)
{
using (var db = new DataContext())
{
db.Passages.Remove(
db.Passages.FirstOrDefault(p => p.Id.Equals(passageInfo.Id))
);
ExReaderPlus.PassageIO.PassageIO passageIO = new ExReaderPlus.PassageIO.PassageIO();
try {
db.SaveChanges();
passageIO.DeletePassage(passageInfo);//删除缓存文件
return(1);
}
catch
{
return(-1);
}
finally
{
db.Database.CloseConnection();
}
}
}
/// <summary>
/// 存储文章到书架,并且把文章缓存到路径
/// 传入参数
/// 【1】文章(包含文章内容和文章标题)
/// 传出参数
/// 异常 -1
/// 成功 1
/// 有文件、数据库操作，建议异步
/// FIXME TODO
/// </summary>
/// <param name="passage"></param>
/// <returns></returns>
public static int SavaPassageInfoAndPassage(ExReaderPlus.Manage.PassageManager.Passage passage)
{
using (var db = new DataContext())
{
var returnPassageInfo = ifExsist(passage);
if (returnPassageInfo == null)//如果文章不存在,就新建文章条目
{
db.Database.Migrate();
var passageInfo = new UserDictionary.Passage();
passageInfo.Name = passage.HeadName;
passageInfo.LastReadTime = System.DateTime.Now;//写入时间
passageInfo.Abstract = getAbstract(passage.Content);
passageInfo.RemainWords = passage.Content.Length.ToString();
//C#中int最大为2^32-1不考虑超过的情况
db.Passages.Add(passageInfo);//存入文件信息
try
{
db.SaveChanges();
}
catch
{
return(-1);
}
finally
{
db.Database.CloseConnection();
}
db.Database.Migrate();
var savePassageInfo = db.Passages //用于传入保存函数的文章信息，主要用来获取数据库自动生成的id
.Where(p => p.Name.Equals(passageInfo.Name))
.Where(p => p.Abstract.Equals(passageInfo.Abstract)).FirstOrDefault(); //通过文章名字和文章摘要查找文章来获取新建的ID
ExReaderPlus.PassageIO.PassageIO passageIO = new ExReaderPlus.PassageIO.PassageIO();
try
{
passageIO.SavaPassage(passage, savePassageInfo);//根据获取的唯一ID保存文件
return(1);
}
catch
{
return(-1);
}
}
else
{
db.Passages.Find(returnPassageInfo.Id).LastReadTime = System.DateTime.Now;
try
{
db.SaveChanges();
return(1);
}
catch
{
return(-1);
}
finally
{
db.Database.CloseConnection();
}
}
}
}
