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#include "Browser.h"

int CharFilterID(int c)
{
	return IsAlNum(c) || c == '_' ? c : 0;
}

bool ParseTopicFileName(const String& fn, String& topic, int& lang)
{
	String q = GetFileTitle(fn);
	int w = q.Find('$');
	if(w < 0)
		return false;
	topic = q.Mid(0, w);
	lang = LNGFromText(q.Mid(w + 1));
	return lang;
}

String GetTopicPath(const TopicLink& tl)
{
	if(IsNull(tl.package))
		return Null;
	return AppendFileName(
	           AppendFileName(PackageDirectory(tl.package), tl.group + ".tpp"),
	                          tl.topic + ".tpp");
}

String GetTopicPath(const String& link)
{
	return GetTopicPath(ParseTopicLink(link));
}

Topic ReadTopic(const char *text)
{
	Topic topic;
	CParser p(text);
	try {
		if(p.Id("topic")) {
			topic.title = p.ReadString();
			p.Char(';');
			topic.text = p.GetPtr();
			return topic;
		}
		while(!p.IsEof()) {
			if(p.Id("TITLE")) {
				p.PassChar('(');
				topic.title = p.ReadString();
				p.PassChar(')');
			}
			else
			if(p.Id("REF")) {
				p.PassChar('(');
				p.ReadString();
				p.PassChar(')');
			}
			else
			if(p.Id("TOPIC_TEXT")) {
				p.PassChar('(');
				topic.text << p.ReadString();
				p.PassChar(')');
			}
			else
			if(p.Id("COMPRESSED")) {
				StringBuffer b;
				b.Reserve(1024);
				while(p.IsInt()) {
					b.Cat(p.ReadInt());
					p.PassChar(',');
				}
				topic.text = ZDecompress(~b, b.GetLength());
			}
			else {
				topic.text << p.GetPtr();
				break;
			}
		}
	}
	catch(CParser::Error e) {
		topic.text = String::GetVoid();
		topic.title = e;
	}
	return topic;
}

Vector<String> GatherLabels(const RichText& text)
{
	Vector<RichValPos> p = text.GetValPos(TopicEditor::TopicPage(), RichText::LABELS);
	Index<String> ref;
	for(int i = 0; i < p.GetCount(); i++)
		if(!IsNull(p[i].data))
			ref.FindAdd(p[i].data.ToString());
	return ref.PickKeys();
}

String WriteTopic(const char *title, const RichText& text)
{
	StringBuffer r;
	r << "topic " << AsCString(title) << ";\r\n";
	r << AsQTF(text, CHARSET_UTF8, QTF_BODY|QTF_ALL_STYLES|QTF_CRLF);
	return r;
}

String WriteTopicI(const char *title, const RichText& text)
{
	StringBuffer r;
	r << "TITLE(" << AsCString(title) << ")\r\n";
	String cpsd = ZCompress(AsQTF(text, CHARSET_UTF8, QTF_BODY|QTF_ALL_STYLES));
	r << "COMPRESSED\r\n";
	const char *s = cpsd;
	const char *e = cpsd.End();
	int q = 0;
	while(s < e) {
		int c = (byte)*s++;
		if(c >= 100)
			r.Cat(c / 100 + '0');
		if(c >= 10)
			r.Cat(c / 10 % 10 + '0');
		r.Cat(c % 10 + '0');
		r.Cat(',');
		if((++q & 255) == 0)
			r << "\r\n";
	}
	r << "\r\n\r\n";
	return r;
}

void SaveGroupInc(const String& grouppath)
{
	String packagedir = GetFileFolder(grouppath);
	String group = GetFileTitle(grouppath);
	if(IsNull(packagedir) || IsNull(group))
		return;
	String gh;
	FindFile ff(AppendFileName(grouppath, "*.tppi"));
	Vector<String> files;
	while(ff) {
		if(ff.IsFile()) {
			files.Add(ff.GetName());
		}
		ff.Next();
	}
	Sort(files);
	for(int i = 0; i < files.GetCount(); i++) {
		gh << "TOPIC(" << AsCString(GetFileTitle(files[i])) << ")\r\n";
		gh << "#include \"" << files[i] << "\"\r\n";
		gh << "END_TOPIC\r\n\r\n";
	}
	String fn = AppendFileName(AppendFileName(packagedir, group + ".tpp"), "all.i");
	if(LoadFile(fn) != gh)
		if(IsNull(gh))
			DeleteFile(fn);
		else
			SaveFile(fn, gh);
}

void SetTopicGroupIncludeable(const char *path, bool set)
{
	FindFile ff(AppendFileName(path, "*.*"));
	while(ff) {
		if(ff.IsFile()) {
			String fn = ff.GetName();
			String t = AppendFileName(path, ForceExt(fn, ".tppi"));
			if(GetFileExt(fn) == ".tpp") {
				String s = AppendFileName(path, fn);
				if(set) {
					Topic p = ReadTopic(LoadFile(s));
					SaveFile(t, WriteTopicI(p.title, ParseQTF(p.text)));
				}
			}
			if(GetFileExt(fn) == ".tppi" && !set)
				DeleteFile(t);
		}
		ff.Next();
	}
	if(set)
		SaveGroupInc(path);
	else
		FileDelete(AppendFileName(path, "all.i"));
}