46 lines
2.2 KiB
C#
46 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Lucene.Net.Analysis;
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using Lucene.Net.Documents;
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using Lucene.Net.QueryParsers;
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using Lucene.Net.Search;
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namespace LibationSearchEngine
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{
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// field names are case specific and, due to StandardAnalyzer, content is case INspecific
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internal static class LuceneExtensions
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{
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internal static void AddRaw(this Document document, string name, string value)
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=> document.Add(new Field(name, value, Field.Store.YES, Field.Index.NOT_ANALYZED));
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internal static void AddAnalyzed(this Document document, string name, string value)
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{
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if (value is not null)
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document.Add(new Field(name.ToLowerInvariant(), value, Field.Store.YES, Field.Index.ANALYZED));
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}
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internal static void AddNotAnalyzed(this Document document, string name, string value)
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=> document.Add(new Field(name.ToLowerInvariant(), value, Field.Store.YES, Field.Index.NOT_ANALYZED));
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internal static void AddBool(this Document document, string name, bool value)
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=> document.Add(new Field(name.ToLowerInvariant(), value.ToString(), Field.Store.YES, Field.Index.ANALYZED_NO_NORMS));
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internal static Query GetQuery(this Analyzer analyzer, string defaultField, string searchString)
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=> new QueryParser(SearchEngine.Version, defaultField.ToLowerInvariant(), analyzer).Parse(searchString);
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// put all numbers, including dates, into this format:
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// ########.##
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internal const int PAD_DIGITS = 8;
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internal const string DECIMAL_PRECISION = ".00";
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internal static string ToLuceneString(this int i) => ((double)i).ToLuceneString();
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internal static string ToLuceneString(this float f) => ((double)f).ToLuceneString();
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internal static string ToLuceneString(this DateTime dt)
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=> dt.ToString("yyyyMMdd") + DECIMAL_PRECISION;
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internal static string ToLuceneString(this DateTime? dt)
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=> dt?.ToLuceneString() ?? "";
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internal static string ToLuceneString(this double d)
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=> d.ToString("0" + DECIMAL_PRECISION).PadLeft(PAD_DIGITS + DECIMAL_PRECISION.Length, '0');
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}
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}
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