private async Task <IEnumerable <SearchResultItem> > SearchCore(string searchText)
{
var source = await _bkRepo.GetAllAsync();
var tags = await _tagRepo.GetAllAsync();
if (string.IsNullOrWhiteSpace(searchText))
{
var latest = source
.Where(x => x.LastClickTime > 0 && x.ClickedCount > 0)
.OrderByDescending(x => x.LastClickTime)
.ThenByDescending(x => x.ClickedCount)
.Select(x => x.Id)
.Take(LatestCount)
.ToList();
return(source
.Select(x =>
{
var r = new SearchResultItem(x)
{
LastClickTime = x.LastClickTime
};
r.AddScore(ScoreReason.Const, 10);
if (latest.FirstOrDefault(a => a == r.Bk.Id) != null)
{
r.AddScore(ScoreReason.Latest, 10 - latest.FindIndex(a => a == r.Bk.Id));
}
return r;
}));
}
var input = SearchInput.Parse(searchText);
_logger.LogInformation(
"Search text parse result, SourceText: {SearchInput} Keywords: {Keywords}, Tags: {Tags}",
input.SourceText,
input.Keywords,
input.Tags);
var tagDict = tags.ToDictionary(x => x.Tag);
var matchTags = tagDict
.Where(tag =>
input.Tags.Contains(tag.Key) ||
input.Keywords.Any(keyword => StringContains(tag.Key, keyword)))
.Select(x => x.Key)
.ToHashSet();
var matchTagAlias = tagDict
.Where(tag => input.Keywords.Any(keyword =>
tag.Value.TagAlias.Values.Any(tagAlias => StringContains(tagAlias.Alias, keyword))))
.Select(x => x.Key)
.ToHashSet();
var re = source
.Select(MatchBk)
.Where(x => x.Matched);
return(re);
SearchResultItem MatchBk(Bk item)
{
var result = new SearchResultItem(item)
{
ClickCount = item.ClickedCount,
LastClickTime = item.LastClickTime
};
result.AddScore(ScoreReason.Title, input.Keywords.Any(x => StringContains(item.Title, x)));
result.AddScore(ScoreReason.TitleAlias, item.TitleAlias?.Values != null &&
item.TitleAlias.Values.Any(al =>
input.Keywords.Any(x =>
StringContains(al.Alias, x))));
result.AddScore(ScoreReason.Url, input.Keywords.Any(x => StringContains(item.Url, x)));
if (item.Tags?.Any() == true)
{
result.AddScore(ScoreReason.Tags, item.Tags.Any(matchTags.Contains));
result.AddScore(ScoreReason.TagAlias, item.Tags.Any(matchTagAlias.Contains));
}
if (result.Score > 0)
{
result.AddScore(ScoreReason.ClickCount, item.ClickedCount);
}
return(result);
}