/// <summary>
/// 照片搜索
/// </summary>
/// <param name="query"></param>
/// <returns></returns>
public PagingDataSet <Photo> Search(PhotoFullTextQuery query)
{
LuceneSearchBuilder searchBuilder = BuildLuceneSearchBuilder(query);
//使用LuceneSearchBuilder构建Lucene需要Query、Filter、Sort
Query photoQuery = null;
Filter filter = null;
Sort sort = null;
searchBuilder.BuildQuery(out photoQuery, out filter, out sort);
//调用SearchEngine.Search(),执行搜索
PagingDataSet <Document> searchResult = searchEngine.Search(photoQuery, filter, sort, query.PageIndex, query.PageSize);
IEnumerable <Document> docs = searchResult.ToList <Document>();
//解析出PhotoId,组装Photo实体
List <long> photoIds = new List <long>();
foreach (var doc in docs)
{
long photoId = long.Parse(doc.Get(PhotoIndexDocument.PhotoId));
photoIds.Add(photoId);
}
IEnumerable <Photo> photoList = photoService.GetPhotos(photoIds);
//组装分页集合
PagingDataSet <Photo> photos = new PagingDataSet <Photo>(photoList)
{
TotalRecords = searchResult.TotalRecords,
PageIndex = searchResult.PageIndex,
PageSize = searchResult.PageSize,
QueryDuration = searchResult.QueryDuration
};
return(photos);
}
/// <summary>
/// 根据照片搜索条件构建lucene查询条件
/// </summary>
/// <param name="query">查询条件</param>
/// <returns>lucene条件</returns>
private LuceneSearchBuilder BuildLuceneSearchBuilder(PhotoFullTextQuery query)
{
LuceneSearchBuilder searchBuilder = new LuceneSearchBuilder();
Dictionary <string, BoostLevel> fieldNameAndBoosts = new Dictionary <string, BoostLevel>();
if (query.UserId > 0)
{
searchBuilder.WithField(PhotoIndexDocument.UserId, query.UserId.ToString(), true, BoostLevel.Hight, false);
}
if (!string.IsNullOrEmpty(query.Keyword))
{
switch (query.Filter)
{
case PhotoSearchRange.DESCRIPTION:
searchBuilder.WithPhrase(PhotoIndexDocument.Description, query.Keyword, BoostLevel.Hight, false);
break;
case PhotoSearchRange.AUTHOR:
searchBuilder.WithPhrase(PhotoIndexDocument.Author, query.Keyword, BoostLevel.Hight, false);
break;
case PhotoSearchRange.TAG:
searchBuilder.WithPhrase(PhotoIndexDocument.Tag, query.Keyword, BoostLevel.Hight, false);
break;
default:
fieldNameAndBoosts.Add(PhotoIndexDocument.Tag, BoostLevel.Hight);
fieldNameAndBoosts.Add(PhotoIndexDocument.Description, BoostLevel.Hight);
fieldNameAndBoosts.Add(PhotoIndexDocument.Author, BoostLevel.Medium);
searchBuilder.WithPhrases(fieldNameAndBoosts, query.Keyword, BooleanClause.Occur.SHOULD, false);
break;
}
}
//筛选 全部、某人的照片
if (query.UserId > 0)
{
searchBuilder.WithField(PhotoIndexDocument.UserId, query.UserId.ToString(), true, BoostLevel.Hight, true);
}
//过滤审核状态和隐私状态
if (!query.IgnoreAuditAndPrivacy)
{
searchBuilder.NotWithField(PhotoIndexDocument.PrivacyStatus, ((int)PrivacyStatus.Private).ToString());
switch (publiclyAuditStatus)
{
case PubliclyAuditStatus.Again:
case PubliclyAuditStatus.Fail:
case PubliclyAuditStatus.Pending:
case PubliclyAuditStatus.Success:
searchBuilder.WithField(PhotoIndexDocument.AuditStatus, ((int)publiclyAuditStatus).ToString(), true, BoostLevel.Hight, true);
break;
case PubliclyAuditStatus.Again_GreaterThanOrEqual:
case PubliclyAuditStatus.Pending_GreaterThanOrEqual:
searchBuilder.WithinRange(PhotoIndexDocument.AuditStatus, ((int)publiclyAuditStatus).ToString(), ((int)PubliclyAuditStatus.Success).ToString(), true);
break;
}
}
return(searchBuilder);
}
