Ejemplo n.º 1
0
        public static void ReformSearchCriteria(SimpleSearchCriteria criteria)
        {
            var specialTerms = GetSpecialTerms(criteria.SearchTerms);
            var terms        = criteria.SearchTerms.Where(t => !t.StartsWith("\"") || !t.EndsWith("\"")).
                               Select(t => t.NormalizeText()).Where(t => !String.IsNullOrWhiteSpace(t)).
                               Distinct().ToList();
            var originalTerms           = terms.ToList();
            var dictionarySplittedTerms = terms.SelectMany
                                              (ServiceLocator.Resolve <DictionaryBasedSplitter>().
                                              ExtractWords).Where(t => t.Length >= TERM_MINIMUM_LENGTH).ToList();

            terms.AddRange(dictionarySplittedTerms.Except(terms));
            var queries = GetReformedQuery(terms.Distinct()).ToList();

            if (queries.Count > 0)
            {
                LogEvents.AddSearchTermsToOriginal(queries.First());
                var query = queries.First();
                terms.AddRange(query.WordsAfterReform.Except(terms));
                criteria.Explanation        = GetExplanation(query, originalTerms);
                criteria.Reformed           = true;
                criteria.RecommendedQueries = queries.GetRange(1, queries.Count - 1).
                                              Select(n => n.QueryString).AsQueryable();
                if (queries.Count > 1)
                {
                    LogEvents.IssueRecommendedQueries(queries.GetRange(1, queries.Count - 1).
                                                      ToArray());
                }
            }
            else
            {
                criteria.Explanation        = String.Empty;
                criteria.Reformed           = false;
                criteria.RecommendedQueries = Enumerable.Empty <String>().AsQueryable();
            }
            terms.AddRange(specialTerms);
            criteria.SearchTerms = ConvertToSortedSet(terms);
        }