451 lines
16 KiB
C#
451 lines
16 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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using System;
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using System.Globalization;
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using System.Linq;
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using System.Linq.Expressions;
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using Nest;
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namespace ASC.ElasticSearch
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{
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public class Selector<T> where T : Wrapper, new()
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{
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private readonly QueryContainerDescriptor<T> queryContainerDescriptor = new QueryContainerDescriptor<T>();
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private SortDescriptor<T> sortContainerDescriptor = new SortDescriptor<T>();
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private QueryContainer queryContainer = new QueryContainer();
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private int limit = 1000, offset;
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public Selector<T> Where<TProperty>(Expression<Func<T, TProperty>> selector, TProperty value)
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{
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queryContainer = queryContainer && +Wrap(selector, (w,r)=> r.Term(w, value));
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return this;
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}
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public Selector<T> Where(Expression<Func<T, Guid>> selector, Guid value)
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{
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queryContainer = queryContainer && +Wrap(selector, (a, w) => w.Match(r => r.Field(a).Query(value.ToString())));
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return this;
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}
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public Selector<T> Gt(Expression<Func<T, object>> selector, double? value)
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{
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queryContainer = queryContainer && +Wrap(selector, (w, r)=> r.Range(a => a.Field(w).GreaterThan(value)));
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return this;
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}
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public Selector<T> Lt(Expression<Func<T, object>> selector, double? value)
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{
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queryContainer = queryContainer && +Wrap(selector, (w, r)=> r.Range(a => a.Field(w).LessThan(value)));
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return this;
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}
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public Selector<T> Gt(Expression<Func<T, object>> selector, DateTime? value)
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{
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queryContainer = queryContainer && +Wrap(selector, (w,r) => r.DateRange(a => a.Field(w).GreaterThan(value)));
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return this;
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}
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public Selector<T> Ge(Expression<Func<T, object>> selector, DateTime? value)
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{
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queryContainer = queryContainer && +Wrap(selector, (w,r) => r.DateRange(a => a.Field(w).GreaterThanOrEquals(value)));
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return this;
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}
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public Selector<T> Lt(Expression<Func<T, object>> selector, DateTime? value)
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{
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queryContainer = queryContainer && +Wrap(selector, (w,r) => r.DateRange(a => a.Field(w).LessThan(value)));
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return this;
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}
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public Selector<T> Le(Expression<Func<T, object>> selector, DateTime? value)
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{
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queryContainer = queryContainer && +Wrap(selector, (w,r) => r.DateRange(a => a.Field(w).LessThanOrEquals(value)));
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return this;
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}
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public Selector<T> In<TValue>(Expression<Func<T, object>> selector, TValue[] values)
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{
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queryContainer = queryContainer && +Wrap(selector, (w,r) => r.Terms(a => a.Field(w).Terms(values)));
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return this;
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}
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public Selector<T> InAll<TValue>(Expression<Func<T, object>> selector, TValue[] values)
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{
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foreach (var v in values)
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{
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var v1 = v;
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queryContainer = queryContainer && +Wrap(selector, (w, r) => r.Term(a => a.Field(w).Value(v1)));
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}
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return this;
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}
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public Selector<T> Match(Expression<Func<T, object>> selector, string value)
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{
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value = value.PrepareToSearch();
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if (IsExactlyPhrase(value))
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{
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queryContainer = queryContainer & Wrap(selector, (a,w) => w.MatchPhrase(r => r.Field(a).Query(value.TrimQuotes())));
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}
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else if (value.HasOtherLetter() || IsExactly(value))
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{
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queryContainer = queryContainer & Wrap(selector, (a,w) => w.Match(r => r.Field(a).Query(value.TrimQuotes())));
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}
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else
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{
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if (IsPhrase(value))
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{
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var phrase = value.Split(' ');
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foreach (var p in phrase)
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{
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var p1 = p;
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queryContainer = queryContainer & Wrap(selector, (a,w) => w.Wildcard(r => r.Field(a).Value(p1.WrapAsterisk())));
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}
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}
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else
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{
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queryContainer = queryContainer & Wrap(selector, (a,w) =>w.Wildcard(r => r.Field(a).Value(value.WrapAsterisk())));
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}
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}
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if (IsExactly(value))
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{
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queryContainer = queryContainer | Wrap(selector, (a,w) => w.MatchPhrase(r => r.Field(a).Query(value)));
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}
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return this;
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}
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private void Match(Func<Fields> propsFunc, string value)
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{
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if (string.IsNullOrEmpty(value)) return;
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value = value.PrepareToSearch();
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var props = propsFunc();
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if (IsExactlyPhrase(value))
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{
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queryContainer = queryContainer && MultiPhrase(props, value.TrimQuotes());
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}
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else if (value.HasOtherLetter() || IsExactly(value))
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{
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queryContainer = queryContainer && MultiMatch(props, value.TrimQuotes());
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}
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else
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{
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if (IsPhrase(value))
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{
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var phrase = value.Split(' ');
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foreach (var p in phrase)
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{
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queryContainer = queryContainer && MultiWildCard(props, p.WrapAsterisk());
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}
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}
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else
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{
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queryContainer = queryContainer && MultiWildCard(props, value.WrapAsterisk());
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}
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}
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if (IsExactly(value))
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{
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queryContainer = queryContainer || MultiPhrase(props, value);
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}
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}
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public Selector<T> Match(Expression<Func<T, object[]>> selector, string value)
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{
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Match(() => ((NewArrayExpression)selector.Body).Expressions.ToArray(), value);
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return this;
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}
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public Selector<T> MatchAll(string value)
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{
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Match(() => new T().GetContentProperties(), value);
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return this;
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}
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public Selector<T> Sort(Expression<Func<T, object>> selector, bool asc)
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{
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sortContainerDescriptor = sortContainerDescriptor.Field(selector, asc ? SortOrder.Ascending : SortOrder.Descending);
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return this;
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}
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public Selector<T> Limit(int newOffset = 0, int newLimit = 1000)
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{
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offset = newOffset;
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limit = newLimit;
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return this;
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}
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public Selector<T> Or(Expression<Func<Selector<T>, Selector<T>>> selectorLeft, Expression<Func<Selector<T>, Selector<T>>> selectorRight)
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{
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return new Selector<T>
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{
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queryContainer = queryContainer &
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(selectorLeft.Compile()(new Selector<T>()).queryContainer |
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selectorRight.Compile()(new Selector<T>()).queryContainer)
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};
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}
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public static Selector<T> Or(Selector<T> selectorLeft, Selector<T> selectorRight)
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{
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return new Selector<T>
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{
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queryContainer = selectorLeft.queryContainer | selectorRight.queryContainer
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};
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}
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public Selector<T> Not(Expression<Func<Selector<T>, Selector<T>>> selector)
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{
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return new Selector<T>
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{
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queryContainer = queryContainer & !selector.Compile()(new Selector<T>()).queryContainer
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};
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}
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public static Selector<T> Not(Selector<T> selector)
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{
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return new Selector<T>
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{
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queryContainer = !selector.queryContainer
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};
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}
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public static Selector<T> operator &(Selector<T> selectorLeft, Selector<T> selectorRight)
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{
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return new Selector<T>
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{
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queryContainer = selectorLeft.queryContainer & selectorRight.queryContainer
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};
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}
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public static Selector<T> operator |(Selector<T> selectorLeft, Selector<T> selectorRight)
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{
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return Or(selectorLeft, selectorRight);
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}
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public static Selector<T> operator !(Selector<T> selector)
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{
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return Not(selector);
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}
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internal Func<SearchDescriptor<T>, ISearchRequest> GetDescriptor(BaseIndexer<T> indexer, bool onlyId = false)
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{
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return s =>
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{
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var result = s
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.Query(q => queryContainer)
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.Index(indexer.IndexName)
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.Sort(r => sortContainerDescriptor)
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.From(offset)
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.Size(limit);
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if (onlyId)
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{
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result = result.Source(r => r.Includes(a => a.Field("id")));
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}
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return result;
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};
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}
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internal Func<DeleteByQueryDescriptor<T>, IDeleteByQueryRequest> GetDescriptorForDelete(BaseIndexer<T> indexer, bool immediately = true)
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{
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return s =>
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{
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var result = s
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.Query(q => queryContainer)
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.Index(indexer.IndexName);
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if (immediately)
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{
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result.Refresh();
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}
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return result;
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};
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}
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internal Func<UpdateByQueryDescriptor<T>, IUpdateByQueryRequest> GetDescriptorForUpdate(BaseIndexer<T> indexer, Func<ScriptDescriptor, IScript> script, bool immediately = true)
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{
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return s =>
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{
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var result = s
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.Query(q => queryContainer)
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.Index(indexer.IndexName)
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.Script(script);
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if (immediately)
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{
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result.Refresh();
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}
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return result;
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};
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}
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private QueryContainer Wrap(Field fieldSelector, Func<Field,QueryContainerDescriptor<T>, QueryContainer> selector)
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{
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var path = IsNested(fieldSelector);
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if (string.IsNullOrEmpty(path) &&
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!string.IsNullOrEmpty(fieldSelector.Name) &&
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fieldSelector.Name.StartsWith(JoinTypeEnum.Sub + ":") &&
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fieldSelector.Name.IndexOf(".", StringComparison.InvariantCulture) > 0)
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{
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var splitted = fieldSelector.Name.Split(':')[1];
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path = splitted.Split('.')[0];
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fieldSelector = new Field(splitted);
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}
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if (!string.IsNullOrEmpty(path))
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{
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return queryContainerDescriptor.Nested(a => a.Query(b => selector(fieldSelector, b)).Path(path));
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}
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return selector(fieldSelector, queryContainerDescriptor);
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}
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private string IsNested(Field selector)
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{
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var lambdaExpression = selector.Expression as LambdaExpression;
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if (lambdaExpression == null) return null;
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var methodCallExpression = lambdaExpression.Body as MethodCallExpression;
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if (methodCallExpression != null && methodCallExpression.Arguments.Count > 1)
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{
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var pathMember = methodCallExpression.Arguments[0] as MemberExpression;
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if (pathMember == null) return null;
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return pathMember.Member.Name.ToLowerCamelCase();
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}
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return null;
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}
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private bool IsPhrase(string searchText)
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{
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return searchText.Contains(" ") || searchText.Contains("\r\n") || searchText.Contains("\n");
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}
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private bool IsExactlyPhrase(string searchText)
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{
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return IsPhrase(searchText) && IsExactly(searchText);
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}
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private bool IsExactly(string searchText)
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{
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return searchText.StartsWith("\"") && searchText.EndsWith("\"");
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}
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private QueryContainer MultiMatch(Fields fields, string value)
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{
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var qcWildCard = new QueryContainer();
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foreach (var field in fields)
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{
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var field1 = field;
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qcWildCard = qcWildCard || Wrap(field1, (a, w) => w.Match(r => r.Field(a).Query(value.ToLower())));
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}
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return qcWildCard;
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}
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private QueryContainer MultiWildCard(Fields fields, string value)
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{
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var qcWildCard = new QueryContainer();
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foreach (var field in fields)
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{
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qcWildCard = qcWildCard || Wrap(field, (a, w) => w.Wildcard(r => r.Field(a).Value(value)));
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}
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return qcWildCard;
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}
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private QueryContainer MultiPhrase(Fields fields, string value)
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{
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var qcWildCard = new QueryContainer();
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foreach (var field in fields)
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{
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qcWildCard = qcWildCard || Wrap(field, (a, w) => w.MatchPhrase(r => r.Field(a).Query(value.ToLower())));
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}
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return qcWildCard;
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}
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}
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internal static class StringExtension
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{
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private static bool Any(this string value, UnicodeCategory category)
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{
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return !string.IsNullOrWhiteSpace(value)
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&& value.Any(@char => char.GetUnicodeCategory(@char) == category);
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}
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public static bool HasOtherLetter(this string value)
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{
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return value.Any(UnicodeCategory.OtherLetter);
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}
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public static string WrapAsterisk(this string value)
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{
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var result = value;
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if (!value.Contains("*") && !value.Contains("?"))
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{
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result = "*" + result + "*";
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}
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return result;
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}
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public static string ReplaceBackslash(this string value)
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{
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return value.Replace("\\", "\\\\");
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}
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public static string TrimQuotes(this string value)
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{
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return value.Trim('\"');
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}
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public static string PrepareToSearch(this string value)
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{
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return value.ReplaceBackslash().ToLowerInvariant().Replace('ё','е').Replace('Ё', 'Е');
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}
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}
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}
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