/// <summary>
/// Devuelve una lista de extractos con las referencias y los fragmentos en las que se
/// encuentra el texto de búsqueda pero sin que sea en la forma de ninguna de la exclusiones.
/// </summary>
/// <param name="searchText">Texto de búsqueda.</param>
/// <param name="excluded">Un array de textos que contienen el texto de búsqueda.</param>
/// <returns>Lista de extractos.</returns>
public List<Excerpt> Search(string searchText, string[] excluded)
{
List<Excerpt> result = new List<Excerpt>();
if (GetParLength() == 0) return result;
for (int p = 0; p < GetParLength(); p++) {
Par par = GetPar(p);
string refer = par.GetID();
string content = par.GetContentCleaned();
//Buscar recursivamente
List<Position> found = CommonTasks.IndexesOf(content, searchText);
List<Position> found2 = new List<Position>();
if (found.Count > 0) {
if (excluded.Length > 0) {
List<Position> foundExcluded = new List<Position>();
for (int i = 0; i < excluded.Length; i++) {
List<Position> fExcluded = CommonTasks.IndexesOf(content, excluded[i]);
for (int j = 0; j < fExcluded.Count; j++) {
Position pos = new Position();
pos.Start = fExcluded[j].Start;
pos.End = fExcluded[j].End;
foundExcluded.Add(pos);
}
}
for (int i = 0; i < found.Count; i++) {
bool toExclude = false;
for (int j = 0; j < foundExcluded.Count; j++) {
if (found[i].Start >= foundExcluded[j].Start &&
found[i].End <= foundExcluded[j].End) {
toExclude = true;
}
}
if (!toExclude) {
found2.Add(found[i]);
}
}
} else {
for (int i = 0; i < found.Count; i++) {
found2.Add(found[i]);
}
}
//Obtener la posición mínima y máxima
int min = content.Length - 1, max = 0;
for (int i = 0; i < found2.Count; i++) {
if (found2[i].Start < min) min = found2[i].Start;
if (found2[i].End > max) max = found2[i].End;
}
Excerpt excerpt = GetExcerpt(content, refer, min, max);
result.Add(excerpt);
}
}
return result;
}
private Excerpt GetExcerpt(string content, string refer, int start, int end)
{
Excerpt excerpt = new Excerpt();
excerpt.Reference = refer;
Position pos = new Position();
pos.Start = start - 45;
if (pos.Start < 0) pos.Start = 0;
pos.End = end + 45;
if (pos.End > content.Length - 1) pos.End = content.Length - 1;
excerpt.Position = pos;
excerpt.Extract = content.Substring(pos.Start, pos.End - pos.Start);
return excerpt;
}