Implemented filtering

- Also an additional extension method for later

BFR/Helpers/Extensions.cs

@@ -1,4 +1,6 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
 
 namespace BFR.Helpers
 {
@@ -11,4 +13,18 @@ namespace BFR.Helpers
                 list.Add(t);
         }
     }
+
+    public static class StringExtensions
+    {
+        public static string Replace(this string input, string pattern, string replacement, bool useRegex = false, bool useRegexReplace = false) =>
+            Regex.Replace(input,
+                useRegex ? pattern : Regex.Escape(pattern),
+                useRegexReplace ? replacement : replacement.Replace("$", "$$"));
+
+        public static bool RegexContains(this string input, string pattern)
+        {
+            try { return Regex.IsMatch(input, pattern); }
+            catch(Exception) { return false; }
+        }
+    }
 }

BFR/MainWindow.xaml

@@ -16,13 +16,13 @@
         <!-- Filters -->
         <Grid Grid.Row="1" Grid.ColumnSpan="3" ColumnDefinitions="auto,*,auto,*,auto,auto,auto,auto" IsVisible="{Binding #FilterExpander.IsExpanded}">
           <TextBlock Grid.Column="0" Text="Extension:"/>
-          <TextBox Grid.Column="1"/>
+          <TextBox Grid.Column="1" Text="{Binding FilterExtension}" KeyUp="FilterChangedAny"/>
           <TextBlock Grid.Column="2" Text="Name:"/>
-          <TextBox Grid.Column="3"/>
+          <TextBox Grid.Column="3" Text="{Binding FilterPattern}" KeyUp="FilterChangedAny"/>
           <TextBlock Grid.Column="4" Text="Full Name:"/>
-          <CheckBox Grid.Column="5"/>
+          <CheckBox Grid.Column="5" IsChecked="{Binding FilterFullName}" Click="FilterChangedAny"/>
           <TextBlock Grid.Column="6" Text="Regex:"/>
-          <CheckBox Grid.Column="7" Margin="4,4,5,4"/>
+          <CheckBox Grid.Column="7" IsChecked="{Binding FilterRegex}" Click="FilterChangedAny" Margin="4,4,5,4"/>
         </Grid>
       </Grid>
     </Border>

BFR/MainWindow.xaml.cs

@@ -1,14 +1,17 @@
 using System;
-using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
 
+using Avalonia.Input;
 using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
+using Avalonia.Interactivity;
 
-using BFR.DataModels;
 using BFR.Helpers;
+using BFR.DataModels;
 
 namespace BFR
 {
@@ -24,11 +27,14 @@ namespace BFR
             Filter();
         }
 
+        public void FilterChangedAny(object sender, KeyEventArgs e) => Filter();
+        public void FilterChangedAny(object sender, RoutedEventArgs e) => Filter();
         public void Filter()
         {
-            Files.ReplaceAll(AllFiles);
-
-            // TODO: Apply filters
+            // Filter all files in the directory for those satisfying the given filters
+            Files.ReplaceAll(AllFiles.Where(x =>
+                (FilterExtension == "" || x.Extension == FilterExtension)
+                && (FilterFullName ? x.FullName : x.Name).RegexContains(FilterRegex ? FilterPattern : Regex.Escape(FilterPattern))));
 
             Preview();
         }
@@ -45,7 +51,7 @@ namespace BFR
             Files.ReplaceAll(new List<FileModel>(Files));
         }
 
-        public MainWindow() =>
+        public MainWindow() => 
             InitializeComponent();
 
         private void InitializeComponent()

BFR/MainWindowUIProperties.cs

@@ -1,6 +1,4 @@
-using System;
-
-using Avalonia;
+using Avalonia;
 using Avalonia.Collections;
 using Avalonia.Controls;
 
@@ -16,5 +14,11 @@ namespace BFR
 
         public AvaloniaList<FileModel> AllFiles { get; } = new AvaloniaList<FileModel>();
         public AvaloniaList<FileModel> Files { get; } = new AvaloniaList<FileModel>();
+
+        // Filters
+        public string FilterExtension { get; set; } = "";
+        public string FilterPattern { get; set; } = "";
+        public bool FilterFullName { get; set; } = false;
+        public bool FilterRegex { get; set; } = false;
     }
 }