private static IEnumerable<string> SplitSongsBySpaces(StreamReader fr, SongStreamSplitProperties props)
{
List<string> lines = new List<string>();
while (!fr.EndOfStream) lines.Add(fr.ReadLine().TrimEnd());
int i = 0;
// odstranit prazdne radky na konci
while (lines.Count > 0 && lines[lines.Count - 1] == "") lines.RemoveAt(lines.Count - 1);
while (i < lines.Count)
{
List<string> songlines = new List<string>();
while (i < lines.Count && lines[i] == "") i++; // preskoc prazdne
for (; ; ) // cyklus pres radky jedne pisne
{
bool issep = true;
for (int j = 0; i + j < lines.Count && j < props.EmptyLineCount; j++)
{
if (lines[i + j] != "")
{
issep = false;
break;
}
}
if (issep && props.ConditionalSplit) // jeste kontrola prvni radky
{
while (i < lines.Count && lines[i] == "") i++; // preskoc prazdne
if (i < lines.Count && SongDataAnalyser.LooksLikeTextLine(lines[i]))
{
issep = false;
}
else if (i < lines.Count) songlines.Add(""); // aby sme nezapomneli prazdnou radku
}
if (issep)
{
break;
}
if (i >= lines.Count) break;
songlines.Add(lines[i]);
i++;
}
if (songlines.Count > 0)
{
yield return String.Join("\n", songlines.ToArray());
}
}
}
private static IEnumerable<string> SplitSongsBySeparator(TextReader fr, SongStreamSplitProperties props)
{
string data = fr.ReadToEnd();
int lastindex = 0;
for (; ; )
{
int index = data.IndexOf(props.SongSeparator, lastindex);
if (index < 0) break;
yield return data.Substring(lastindex, index - lastindex);
lastindex = index + props.SongSeparator.Length;
}
if (lastindex < data.Length) yield return data.Substring(lastindex);
}
public static IEnumerable<string> SplitSongs(StreamReader fr, SongStreamSplitProperties props)
{
if (props.PerformSplit)
{
if (props.EmptyLineCount > 0) // rozdeleni rizene poctem prazdnych radek
{
return SplitSongsBySpaces(fr, props);
}
else if (props.SongSeparator != "")
{
return SplitSongsBySeparator(fr, props);
}
}
return new string[] { fr.ReadToEnd() };
}