/// <summary>
/// インデックスなしでの検索です。
/// </summary>
/// <param name="csvFilePath"></param>
/// <param name="keyword"></param>
/// <returns></returns>
private static IEnumerable <string> SearchKeywordNoIndex(string csvFilePath, string keyword)
{
var splitKeywords = IndexUtility.SplitKeyword(keyword, 2).ToList();
using (var reader = new CsvReader(new StreamReader(csvFilePath, Encoding.GetEncoding("Shift-JIS"))))
{
while (reader.Read())
{
var containCheckList = new bool[splitKeywords.Count()];
foreach (var cellData in reader.Context.Record)
{
foreach (var item in splitKeywords.Select((value, index) => new { value, index }))
{
if (cellData.Contains(item.value))
{
containCheckList[item.index] = true;
}
}
}
if (containCheckList.All(isContain => isContain))
{
string text = string.Join(",", reader.Context.Record);
yield return(text);
}
}
}
}
/// <summary>
/// レコードを検索します。
/// </summary>
/// <param name="keyword">検索キーワード</param>
public IEnumerable <string> SearchRecord(string keyword)
{
string filePath = FileUtility.GetIndexFilePath(_storageDirectoryPath);
if (String.IsNullOrEmpty(filePath))
{
Console.WriteLine("インデックスがありません。先にインデックスを作成してください。");
yield break;
}
var keywordSplit = IndexUtility.SplitKeyword(keyword, Ngram).ToList();
var indices = IndexUtility.LoadIndexData(filePath, FileEncoding, keywordSplit);
var result = IndexUtility.SearchKeywordLines(keywordSplit.FirstOrDefault(), indices);
foreach (var item in keywordSplit.Skip(1))
{
var next = IndexUtility.SearchKeywordLines(item, indices).ToList();
result = result.Intersect(next);
}
var resultList = result.ToList();
string csvFilePath = FileUtility.GetCsvFilePath(_storageDirectoryPath);
foreach (var text in FileUtility.GetFileLines(resultList, csvFilePath, FileEncoding))
{
yield return(text);
}
}
public IList <string> SplitKeyword(string keyword, int ngram)
{
return(IndexUtility.SplitKeyword(keyword, ngram).ToList());
}
