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Added negation operator

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This commit is contained in:
SuperGouge 2019-01-08 17:20:49 +01:00
parent c818267526
commit 194b1d9fb5
4 changed files with 36 additions and 8 deletions
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19
Sieve/Models/FilterTerm.cs
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@ -1,5 +1,6 @@
using System; using System;
using System.Linq; using System.Linq;
using System.Linq.Expressions;
using System.Text.RegularExpressions; using System.Text.RegularExpressions;
namespace Sieve.Models namespace Sieve.Models
@ -11,6 +12,10 @@ namespace Sieve.Models
private const string EscapedPipePattern = @"(?<!($|[^\\])(\\\\)*?\\)\|"; private const string EscapedPipePattern = @"(?<!($|[^\\])(\\\\)*?\\)\|";
private static readonly string[] Operators = new string[] { private static readonly string[] Operators = new string[] {
"!@=*",
"!_=*",
"!@=",
"!_=",
"==*", "==*",
"@=*", "@=*",
"_=*", "_=*",
@ -34,7 +39,8 @@ namespace Sieve.Models
Values = filterSplits.Length > 1 ? Regex.Split(filterSplits[1], EscapedPipePattern).Select(t => t.Trim()).ToArray() : null; Values = filterSplits.Length > 1 ? Regex.Split(filterSplits[1], EscapedPipePattern).Select(t => t.Trim()).ToArray() : null;
Operator = Array.Find(Operators, o => value.Contains(o)) ?? "=="; Operator = Array.Find(Operators, o => value.Contains(o)) ?? "==";
OperatorParsed = GetOperatorParsed(Operator); OperatorParsed = GetOperatorParsed(Operator);
OperatorIsCaseInsensitive = Operator.Contains("*"); OperatorIsCaseInsensitive = Operator.EndsWith("*");
OperatorIsNegated = OperatorParsed != FilterOperator.NotEquals && Operator.StartsWith("!");
} }
} }
@ -47,12 +53,11 @@ namespace Sieve.Models
public string Operator { get; private set; } public string Operator { get; private set; }
private FilterOperator GetOperatorParsed(string Operator) private FilterOperator GetOperatorParsed(string @operator)
{ {
switch (Operator.Trim().ToLower()) switch (@operator.TrimEnd('*'))
{ {
case "==": case "==":
case "==*":
return FilterOperator.Equals; return FilterOperator.Equals;
case "!=": case "!=":
return FilterOperator.NotEquals; return FilterOperator.NotEquals;
@ -65,10 +70,10 @@ namespace Sieve.Models
case "<=": case "<=":
return FilterOperator.LessThanOrEqualTo; return FilterOperator.LessThanOrEqualTo;
case "@=": case "@=":
case "@=*": case "!@=":
return FilterOperator.Contains; return FilterOperator.Contains;
case "_=": case "_=":
case "_=*": case "!_=":
return FilterOperator.StartsWith; return FilterOperator.StartsWith;
default: default:
return FilterOperator.Equals; return FilterOperator.Equals;
@ -77,6 +82,8 @@ namespace Sieve.Models
public bool OperatorIsCaseInsensitive { get; private set; } public bool OperatorIsCaseInsensitive { get; private set; }
public bool OperatorIsNegated { get; private set; }
public bool Equals(FilterTerm other) public bool Equals(FilterTerm other)
{ {
return Names.SequenceEqual(other.Names) return Names.SequenceEqual(other.Names)

1
Sieve/Models/IFilterTerm.cs
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@ -6,6 +6,7 @@
string[] Names { get; } string[] Names { get; }
string Operator { get; } string Operator { get; }
bool OperatorIsCaseInsensitive { get; } bool OperatorIsCaseInsensitive { get; }
bool OperatorIsNegated { get; }
FilterOperator OperatorParsed { get; } FilterOperator OperatorParsed { get; }
string[] Values { get; } string[] Values { get; }
} }

11
Sieve/Services/SieveProcessor.cs
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@ -203,13 +203,20 @@ namespace Sieve.Services
.First(m => m.Name == "ToUpper" && m.GetParameters().Length == 0)); .First(m => m.Name == "ToUpper" && m.GetParameters().Length == 0));
} }
var expression = GetExpression(filterTerm, filterValue, propertyValue);
if (filterTerm.OperatorIsNegated)
{
expression = Expression.Not(expression);
}
if (innerExpression == null) if (innerExpression == null)
{ {
innerExpression = GetExpression(filterTerm, filterValue, propertyValue); innerExpression = expression;
} }
else else
{ {
innerExpression = Expression.Or(innerExpression, GetExpression(filterTerm, filterValue, propertyValue)); innerExpression = Expression.Or(innerExpression, expression);
} }
} }
} }

13
SieveUnitTests/General.cs
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@ -101,6 +101,19 @@ namespace SieveUnitTests
Assert.IsTrue(result.Count() == 0); Assert.IsTrue(result.Count() == 0);
} }
[TestMethod]
public void NotContainsWorks()
{
var model = new SieveModel()
{
Filters = "Title!@=D",
};
var result = _processor.Apply(model, _posts);
Assert.IsTrue(result.Count() == 3);
}
[TestMethod] [TestMethod]
public void CanFilterBools() public void CanFilterBools()
{ {