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using Nest;
using System;
using System.Collections.Generic;
using System.Linq;

namespace NestPercolation
{
    class Program
    {
        static void Main(string[] args)

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public static class QueryStringSearchExtensions {
        public static IQueriedSearch<TSource, QueryStringQuery> InAnalyzedField<TSource, TExistingQuery>(
            this IQueriedSearch<TSource, TExistingQuery> search,
            Expression<Func<TSource, string>> fieldSelector,
            double? relativeImportance = null)
            where TExistingQuery : QueryStringQuery
        {
            fieldSelector.ValidateNotNullArgument("fieldSelector");

            return search.InField(search.Client.Conventions.FieldNameConvention.GetFieldNameForAnalyzed((Expression)fieldSelector), relativeImportance);

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public static class HighlightExtensions
{
    public static IQueriedSearch<TSource, TExistingQuery> WithAttachmentHighlight<TSource, TExistingQuery>(
        this IQueriedSearch<TSource, TExistingQuery> search, Action<FieldHighlightRequest> highlightAction = null)
        where TExistingQuery : QueryStringQuery
    {
        return new Search<TSource, TExistingQuery>(search, context =>
        {
            var fieldName = "*$$attachment";
            var request = new FieldHighlightRequest(fieldName);

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public static class NestedFacetExtensions
{
  // Allow passing Action<NestedTermsFacetRequest> facetRequestAction (in order to set for example Size on the request)
  public static ITypeSearch<TSource> TermsFacetFor<TSource, TListItem>
            (this ITypeSearch<TSource> search,Expression<Func<TSource, IEnumerable<TListItem>>> nestedFieldSelector, 
            Expression<Func<TListItem, string>> itemFieldSelector, 
            Expression<Func<TListItem, Filter>> filterExpression = null,
            Action<NestedTermsFacetRequest> facetRequestAction = null)
  {
      var facetFilter = NestedFilter.Create(search.Client.Conventions, nestedFieldSelector, filterExpression);

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public static class NestedTermsFacetExtensions
{
    public static ITypeSearch<TSource> NestedTermsFacetFor<TSource, TEnumerable>(
        this ITypeSearch<TSource> search,
        Expression<Func<TSource, IEnumerable<TEnumerable>>> enumerableFieldSelector, Expression<Func<TEnumerable, string>> itemFieldSelector)
    {
        return search.AddNestedTermsFacetFor(enumerableFieldSelector, itemFieldSelector, null);
    }

    public static ITypeSearch<TSource> NestedTermsFacetFor<TSource, TEnumerable>(

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public static ITypeSearch<TSource> ThenByScore<TSource>(this ITypeSearch<TSource> search)
{
    return new Search<TSource, IQuery>(search, context =>
        context.RequestBody.Sort.Add(new Sorting("_score")));
}

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// At query time add appropriate tags
using EPiServer.Find.Framework.Statistics;

client.Search<>()
...
.Track(new string[] { "mytag" })
.GetResults()

// When fetching autocomplete/didyoumean/spellcheck through the REST endpoint

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$.ajax
({
  type: "GET",
  url: "https://server/_status",
  dataType: 'jsonp'
}).done(function(data) {
  for(indexName in data.indices)
  {
    $('#indices').append('<div><span>' + indexName + '</span>&nbsp;<span>' + data.indices[indexName].docs.num_docs + '</span>&nbsp;<span>' + data.indices[indexName].index.primary_size +'</span></div>');
  }

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public static ITypeSearch<TSource> FilterHits<TSource>(this ITypeSearch<TSource> search, Filter filter)
{
    return new Search<TSource, IQuery>(search, context =>
    {
        var filterToAdd = filter;
        if (context.RequestBody.Filter.IsNotNull())
        {
            filterToAdd = filter & context.RequestBody.Filter;
        }
        context.RequestBody.Filter = filterToAdd;

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public static class TermsFacetExtensions
{
    public static ITypeSearch<TSource> TermsFacetFor<TSource, TListItem>(this ITypeSearch<TSource> search, Expression<Func<TSource, IEnumerable<TListItem>>> fieldListSelector, Expression<Func<TListItem, object>> fieldListItemSelector)
    {
        fieldListSelector.ValidateNotNullArgument("fieldListSelector");
        fieldListItemSelector.ValidateNotNullArgument("fieldListItemSelector");

        var facetName = fieldListSelector.GetFieldPath() + "." + fieldListItemSelector.GetFieldPath();
        var fieldName = search.Client.Conventions.FieldNameConvention.GetFieldName(fieldListSelector) + "." + search.Client.Conventions.FieldNameConvention.GetFieldName(fieldListItemSelector);