Add Fuzzy Match Filter Expression

Shoko.Server/Filters/Logic/Strings/StringFuzzyMatchesExpression.cs

@@ -0,0 +1,86 @@
+using System;
+using Shoko.Commons.Utils;
+using Shoko.Server.Filters.Interfaces;
+
+namespace Shoko.Server.Filters.Logic.Strings;
+
+public class StringFuzzyMatchesExpression : FilterExpression<bool>, IWithStringSelectorParameter, IWithSecondStringSelectorParameter, IWithStringParameter
+{
+    public StringFuzzyMatchesExpression(FilterExpression<string> left, FilterExpression<string> right)
+    {
+        Left = left;
+        Right = right;
+    }
+
+    public StringFuzzyMatchesExpression(FilterExpression<string> left, string parameter)
+    {
+        Left = left;
+        Parameter = parameter;
+    }
+
+    public StringFuzzyMatchesExpression() { }
+
+    public FilterExpression<string> Left { get; set; }
+    public FilterExpression<string> Right { get; set; }
+    public string Parameter { get; set; }
+    public override bool TimeDependent => Left.TimeDependent || (Right?.TimeDependent ?? false);
+    public override bool UserDependent => Left.UserDependent || (Right?.UserDependent ?? false);
+    public override string HelpDescription => "This passes if the left selector fuzzy matches either the right selector or the parameter";
+
+    public override bool Evaluate(IFilterable filterable, IFilterableUserInfo userInfo)
+    {
+        var left = Left.Evaluate(filterable, userInfo);
+        var right = Parameter ?? Right?.Evaluate(filterable, userInfo);
+        if (string.IsNullOrEmpty(left) || string.IsNullOrEmpty(right))
+        {
+            return false;
+        }
+
+        return left.FuzzyMatches(right);
+    }
+
+    protected bool Equals(StringFuzzyMatchesExpression other)
+    {
+        return base.Equals(other) && Equals(Left, other.Left) && Equals(Right, other.Right) && Parameter == other.Parameter;
+    }
+
+    public override bool Equals(object obj)
+    {
+        if (ReferenceEquals(null, obj))
+        {
+            return false;
+        }
+
+        if (ReferenceEquals(this, obj))
+        {
+            return true;
+        }
+
+        if (obj.GetType() != this.GetType())
+        {
+            return false;
+        }
+
+        return Equals((StringFuzzyMatchesExpression)obj);
+    }
+
+    public override int GetHashCode()
+    {
+        return HashCode.Combine(base.GetHashCode(), Left, Right, Parameter);
+    }
+
+    public static bool operator ==(StringFuzzyMatchesExpression left, StringFuzzyMatchesExpression right)
+    {
+        return Equals(left, right);
+    }
+
+    public static bool operator !=(StringFuzzyMatchesExpression left, StringFuzzyMatchesExpression right)
+    {
+        return !Equals(left, right);
+    }
+
+    public override bool IsType(FilterExpression expression)
+    {
+        return expression is StringFuzzyMatchesExpression exp && Left.IsType(exp.Left) && (Right?.IsType(exp.Right) ?? true);
+    }
+}