Added icon converter for attachments

Author: Avid29

src/Quarrel.ViewModels/Bindables/Messages/Embeds/BindableAttachment.cs

@@ -5,6 +5,7 @@
 using Quarrel.Client.Models.Messages.Embeds;
 using Quarrel.Services.Discord;
 using Quarrel.Services.Dispatcher;
+using System.Text.RegularExpressions;
 
 namespace Quarrel.Bindables.Messages.Embeds
 {
@@ -13,6 +14,8 @@ namespace Quarrel.Bindables.Messages.Embeds
     /// </summary>
     public class BindableAttachment : BindableItem
     {
+        private const string FileExtensionRegex = @"\.([\w]+)$";
+
         private Attachment _attachment;
 
         internal BindableAttachment(
@@ -33,5 +36,17 @@ public Attachment Attachment
             get => _attachment;
             private set => SetProperty(ref _attachment, value);
         }
+
+        /// <summary>
+        /// Gets the file's extension.
+        /// </summary>
+        public string FileExtension
+        {
+            get
+            {
+                var match = Regex.Match(Attachment.Filename, FileExtensionRegex);
+                return match.Groups[1].Value;
+            }
+        }
     }
 }

src/Quarrel/Converters/Discord/Messages/Attachments/AttachmentIconConverter.cs

@@ -0,0 +1,64 @@
+// Quarrel © 2022
+
+namespace Quarrel.Converters.Discord.Messages.Attachments
+{
+    public class AttachmentIconConverter
+    {
+        public static string Convert(string filetype)
+        {
+            // TODO: Replace with dictionary from file
+            return filetype switch
+            {
+                // Text file icon
+                "txt" => "",
+
+                // Zipped file(s) icon
+                "7z" or
+                "gz" or
+                "zip" => "",
+
+                // Image icon
+                "png" or
+                "jpg" or
+                "jpeg" or
+                "bmp" or
+                "gif" => "",
+
+                // Audio icon
+                "mp3" or 
+                "wav" => "",
+
+                // Video icon
+                "mp4" or
+                "mov" => "",
+
+                // 3D icon
+                "obj" or
+                "blend" => "",
+
+                // Console icon
+                "ps1" or
+                "batch" => "",
+
+                // App Package icon
+                "appx" or
+                "appxbundle" or
+                "msix" or
+                "msixbundle" or
+                "appinstaller" => "",
+
+                // Certificate icon
+                "cer" => "",
+
+                // Code icon
+                "json" => "",
+
+                // Disc icon
+                "iso" => "",
+
+                // File icon
+                _ => "",
+            };
+        }
+    }
+}

src/Quarrel/DataTemplates/MessageTemplates.xaml

@@ -26,7 +26,7 @@
                 <ColumnDefinition Width="Auto"/>
                 <ColumnDefinition Width="Auto"/>
             </Grid.ColumnDefinitions>
-            <FontIcon x:Name="FileIcon" FontSize="36" Glyph="" HorizontalAlignment="Left" Margin="0,0,6,0"/>
+            <FontIcon x:Name="FileIcon" FontSize="36" Glyph="{x:Bind aconvert:AttachmentIconConverter.Convert(FileExtension)}" HorizontalAlignment="Left" Margin="0,0,6,0"/>
             <StackPanel Grid.Column="1">
                 <HyperlinkButton Content="{x:Bind Attachment.Filename}" NavigateUri="{x:Bind Attachment.ProxyUrl}" FontSize="18" Padding="0" Style="{StaticResource PlainTextHyperlinkStyle}"/>
                 <TextBlock Text="{x:Bind aconvert:HumanizeByteSizeConverter.Convert(Attachment.Size)}" FontSize="11" Opacity="0.5" Margin="0,-2,0,0"/>

src/Quarrel/Quarrel.csproj

@@ -149,6 +149,7 @@
     <Compile Include="Converters\Discord\Channels\IsPrivateChannelConverter.cs" />
     <Compile Include="Converters\Discord\Channels\IsPrivateChannelVisibleConverter.cs" />
     <Compile Include="Converters\Discord\Channels\MemberCountConverter.cs" />
+    <Compile Include="Converters\Discord\Messages\Attachments\AttachmentIconConverter.cs" />
     <Compile Include="Converters\Discord\Messages\Attachments\HumanizeByteSizeConverter.cs" />
     <Compile Include="Converters\Discord\Messages\InfoMessageColorConverter.cs" />
     <Compile Include="Converters\Discord\Messages\InfoMessageContentConverter.cs" />

src/Quarrel/Selectors/Messages/AttachmentTemplateSelector.cs

@@ -16,9 +16,7 @@ protected override DataTemplate SelectTemplateCore(object item, DependencyObject
         {
             if (item is BindableAttachment attachment)
             {
-                int index = attachment.Attachment.Filename.LastIndexOf('.');
-                string filetype = attachment.Attachment.Filename.Substring(index + 1).ToLowerInvariant();
-                return filetype switch
+                return attachment.FileExtension switch
                 {
                     "png" or
                     "jpg" or