private static IReadOnlyCollection <HighlightOffset> ToHighlightOffsets(
this HighlightHit highlightHit, string preAndPostTag)
{
// Validate parameters.
if (string.IsNullOrWhiteSpace(preAndPostTag))
{
throw new ArgumentNullException(nameof(preAndPostTag));
}
// If null, return null.
if (highlightHit == null)
{
return(null);
}
// Get the single string, as fragments should have been reduced to 0.
string highlight = highlightHit.Highlights.Single();
// Enumerates offsets.
IEnumerable <HighlightOffset> EnumerateHighlightHits()
{
// Need to parse. Split.
var parts = highlight.Split(new [] { preAndPostTag }, StringSplitOptions.None);
// The current offset.
int offset = 0;
// In a highlight?
bool inHighlight = false;
// Cycle through the parts.
foreach (string part in parts)
{
// If in a highlight yield hit.
if (inHighlight)
{
// Yield.
yield return(new HighlightOffset {
Offset = offset,
Length = part.Length
});
}
// Increment the offset by the length.
offset += part.Length;
// Update whether or not in the highlight.
inHighlight = !inHighlight;
}
}
// Materialize the set.
return(EnumerateHighlightHits().ToReadOnlyCollection());
}
public MagnetLinkSearchResultViewModel MagnetLinkSearch(string key, int pageIndex, int pageSize = 10)
{
var result = new MagnetLinkSearchResultViewModel()
{
SearchId = Guid.NewGuid().ToString(),
SearchKey = key,
PageIndex = pageIndex,
PageSize = pageSize
};
var response = _client.Search <MagnetLink>(s => s
.Index(IndexName)
.Type(TypeName)
.From((pageIndex - 1) * pageSize)
.Size(pageSize)
//.Query(q => q.
// MultiMatch(mm => mm.Fields(fs => fs.Fields(f => f.Name, f => f.InfoHash)).Query(key)
// ))
//.Query(q => q.
// Match(m => m.Field(f => f.Name).Query(key)
//))
//.Query(q => q
// .MatchAll()
//)
.Query(q => q
.Bool(b => b
.Should(sd => sd
.Term(t => t.Field(f => f.InfoHash).Value(key)),
sd => sd
.Match(m => m
.Field(f => f.Name)
.Query(key)
)
)))
.Highlight(h => h
//.PreTags("<em>")
//.PostTags("</em>")
.Fields(
fs => fs.Field(f => f.Name)
)
)
//.Sort(st => st.Descending(d => d.CreateTime))
.Source(sc => sc.IncludeAll())
);
result.Totals = (int)response.Total;
result.FindTime = response.Took.ToString();//毫秒
foreach (var hit in response.Hits)
{
var item = hit.Source;
//高亮
var highlightValue = new HighlightHit();
if (hit.Highlights.TryGetValue("name", out highlightValue))
{
item.Name = highlightValue.Highlights.FirstOrDefault() ?? item.Name;
}
result.SearchResult.Add(item);
}
return(result);
}