/// <summary>
/// paralell parse chapters info
/// </summary>
/// <param name="threadsNumber">how many threads is running at the same time</param>
/// <param name="match">add ChapterInfo to list if ShortChapterInfo match</param>
protected void ParseChaptersInfo(Predicate <ShortChapterInfo> match, int threadsNumber)
{
IChapterJsonParser jsonParser = new ChapterJsonParser();
Thread[] threads = new Thread[threadsNumber];
int threadsIndex = 0;
foreach (var chapter in MangaInfo.ShortChaptersInfo)
{
// check if it s match the request
if (match(chapter))
{
// we use post increament so we just compare this values
if (threadsIndex == threadsNumber)
{
threadsIndex = 0;
// start threads
foreach (var thread in threads)
{
thread.Start();
}
//// wait for thread's work complete
//foreach (var thread in threads)
//{
// thread.Join();
//}
}
// parse json func
ThreadStart parseFunc = () =>
{
// wait for calling thread wait for end of the parsing
// parse data from site
var chapterLocal = chapter;
int id = Convert.ToInt32(chapterLocal.Id);
IChapterInfo info = jsonParser.GetChapterInfo(id);
ChaptersInfo.Add(info);
};
threads[threadsIndex++] = new Thread(parseFunc);
}
}
// if something left in threads array and yeah there only matched chapters
if (threadsIndex > 0)
{
// threadsIndex is size of the array with useful parseFuncs
// start threads
for (int i = 0; i < threadsIndex; i++)
{
threads[i].Start();
}
// wait for thread's work complete
for (int i = 0; i < threadsIndex; i++)
{
threads[i].Join();
}
}
}
/// <summary>
/// parse chapters info
/// </summary>
/// <param name="match">predicate for chapters</param>
public List <IChapterInfo> ParseChaptersInfo(Predicate <ShortChapterInfo> match)
{
IChapterJsonParser jsonParser = new ChapterJsonParser();
List <IChapterInfo> chaptersInfo = new List <IChapterInfo>();
foreach (var chapter in MangaInfo.ShortChaptersInfo)
{
// check if it s match the user's request
if (match(chapter))
{
int id = Convert.ToInt32(chapter.Id);
IChapterInfo info = jsonParser.GetChapterInfo(id);
chaptersInfo.Add(info);
}
}
return(chaptersInfo);
}
/// <summary>
/// parse pages into directory
/// </summary>
/// <param name="chapterInfo">chapterInfo for parsing</param>
/// <param name="numberOfTry">number of try if while parsing something gone wrong it will try to parse this again this amount of time</param>
public void Parse(IChapterInfo chapterInfo, int numberOfTry)
{
int numberOfPages = chapterInfo.Pages.Count;
int parsedPages = 0;
foreach (var page in chapterInfo.Pages)
{
string pageUrl = $"{chapterInfo.ServerUrl}/{chapterInfo.Hash}/{page.PageName}";
// parse try number of try
for (int i = 0; i < numberOfTry; i++)
{
// parse one page
try
{
ParsePage(page, chapterInfo);
// call delagate
string message = $"{DateTime.Now}: page \"{pageUrl}\" has parsed successfully into dir \"{Dir.FullName}\", page number {page.PageNumber}, chapter number: {chapterInfo.Chapter}, volume number: {chapterInfo.Volume}, chapter id: {chapterInfo.Id}";
var e = new OnProgressParserEventArgs()
{
NumberOfPages = numberOfPages, ParsedPages = ++parsedPages, Message = message
};
OnProgress?.Invoke(this, e);
#if DEBUG
Trace.WriteLine($"{DateTime.Now}: page \"{pageUrl}\" has parsed successfully, page number {page.PageNumber}, chapter number: {chapterInfo.Chapter}, volume number: {chapterInfo.Volume}, chapter id: {chapterInfo.Id}");
#endif
break;
}
catch (Exception exc)
{
#if DEBUG
Trace.WriteLine($"{DateTime.Now}: FAIL page \"{pageUrl}\" has parsed unsuccessfully, page number {page.PageNumber}, chapter number: {chapterInfo.Chapter}, volume number: {chapterInfo.Volume}, chapter id: {chapterInfo.Id}, \n{exc.Message}{exc.StackTrace}\n");
#endif
// if numberOfTry is already passed then we will throw exception
if (i + 1 == numberOfTry)
{
throw;
}
}
}
}
}
/// <summary>
/// parse page
/// </summary>
/// <param name="page">page info in chapter inf</param>
/// <param name="chapterInfo">chapterInfo</param>
protected void ParsePage(ChapterInfo.Page page, IChapterInfo chapterInfo)
{
// page's names have string type
string pageName = page.PageName;
// local page name and full path to page
// VOLUMENUMBER_CHAPTERNUMBER_PAGENUMBER
string localPageName = $"{chapterInfo.Volume}_{chapterInfo.Chapter}_{page.PageNumber}";
string pageExtension = Path.GetExtension(pageName);
char dirSeparatorChar = Path.DirectorySeparatorChar;
string fullPath = $"{Dir.FullName}{dirSeparatorChar}{localPageName}{pageExtension}";
// get url to image page
string pageUrl = $"{chapterInfo.ServerUrl}/{chapterInfo.Hash}/{pageName}";
WebRequest request = WebRequest.Create(pageUrl);
#if DEBUG
Trace.WriteLine($"{DateTime.Now}: web request has created to this url \"{pageUrl}\", chapter id: {chapterInfo.Id}");
#endif
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
#if DEBUG
Trace.WriteLine($"{DateTime.Now}: recieve response from \"{pageUrl}\", chapter id: {chapterInfo.Id}");
#endif
// open file
BinaryReader reader = new BinaryReader(response.GetResponseStream());
FileStream fileStream = File.OpenWrite(fullPath);
BinaryWriter writer = new BinaryWriter(fileStream);
// make request to server containing pages,
try
{
// write content to image file
int bufferSize = 1024;
byte[] buffer;
while (true)
{
buffer = reader.ReadBytes(bufferSize);
writer.Write(buffer);
if (buffer.Length == 0)
{
break;
}
}
// save writed data
writer.Flush();
#if DEBUG
Trace.WriteLine($"{DateTime.Now}: page has writed to file \"{fullPath}\", chapter id: {chapterInfo.Id}");
#endif
}
finally
{
// close all streams
writer.Close();
reader.Close();
response.Close();
}
}