Add support for `has:invite` filter that matches messages with guild invites (#1188)

DiscordChatExporter.Cli.Tests/Specs/FilterSpecs.cs

@@ -37,7 +37,7 @@ public class FilterSpecs
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
             .Should()
-            .ContainSingle("Some random text");
+            .AllBe("Some random text");
     }
 
     [Fact]
@@ -66,7 +66,7 @@ public class FilterSpecs
     }
 
     [Fact]
-    public async Task I_can_filter_the_export_to_only_include_messages_that_contain_the_specified_content()
+    public async Task I_can_filter_the_export_to_only_include_messages_that_contain_images()
     {
         // Arrange
         using var file = TempFile.Create();
@@ -87,7 +87,32 @@ public class FilterSpecs
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
             .Should()
-            .ContainSingle("This has image");
+            .AllBe("This has image");
+    }
+
+    [Fact]
+    public async Task I_can_filter_the_export_to_only_include_messages_that_contain_guild_invites()
+    {
+        // Arrange
+        using var file = TempFile.Create();
+
+        // Act
+        await new ExportChannelsCommand
+        {
+            Token = Secrets.DiscordToken,
+            ChannelIds = [ChannelIds.FilterTestCases],
+            ExportFormat = ExportFormat.Json,
+            OutputPath = file.Path,
+            MessageFilter = MessageFilter.Parse("has:invite")
+        }.ExecuteAsync(new FakeConsole());
+
+        // Assert
+        Json.Parse(await File.ReadAllTextAsync(file.Path))
+            .GetProperty("messages")
+            .EnumerateArray()
+            .Select(j => j.GetProperty("content").GetString())
+            .Should()
+            .AllBe("This has invite");
     }
 
     [Fact]
@@ -112,7 +137,7 @@ public class FilterSpecs
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
             .Should()
-            .ContainSingle("This is pinned");
+            .AllBe("This is pinned");
     }
 
     [Fact]
@@ -137,6 +162,6 @@ public class FilterSpecs
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
             .Should()
-            .ContainSingle("This has mention");
+            .AllBe("This has mention");
     }
 }

DiscordChatExporter.Core/Exporting/Filtering/HasMessageFilter.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Linq;
-using System.Text.RegularExpressions;
 using DiscordChatExporter.Core.Discord.Data;
+using DiscordChatExporter.Core.Markdown.Parsing;
 
 namespace DiscordChatExporter.Core.Exporting.Filtering;
 
@@ -10,14 +10,19 @@ internal class HasMessageFilter(MessageContentMatchKind kind) : MessageFilter
     public override bool IsMatch(Message message) =>
         kind switch
         {
-            MessageContentMatchKind.Link
-                => Regex.IsMatch(message.Content, "https?://\\S*[^\\.,:;\"\'\\s]"),
+            MessageContentMatchKind.Link => MarkdownParser.ExtractLinks(message.Content).Any(),
             MessageContentMatchKind.Embed => message.Embeds.Any(),
             MessageContentMatchKind.File => message.Attachments.Any(),
             MessageContentMatchKind.Video => message.Attachments.Any(file => file.IsVideo),
             MessageContentMatchKind.Image => message.Attachments.Any(file => file.IsImage),
             MessageContentMatchKind.Sound => message.Attachments.Any(file => file.IsAudio),
             MessageContentMatchKind.Pin => message.IsPinned,
+            MessageContentMatchKind.Invite
+                => MarkdownParser
+                    .ExtractLinks(message.Content)
+                    .Select(l => l.Url)
+                    .Select(Invite.TryGetCodeFromUrl)
+                    .Any(c => !string.IsNullOrWhiteSpace(c)),
             _
                 => throw new InvalidOperationException(
                     $"Unknown message content match kind '{kind}'."

DiscordChatExporter.Core/Exporting/Filtering/MessageContentMatchKind.cs

@@ -8,5 +8,6 @@ internal enum MessageContentMatchKind
     Video,
     Image,
     Sound,
-    Pin
+    Pin,
+    Invite
 }

DiscordChatExporter.Core/Exporting/Filtering/Parsing/FilterGrammar.cs

@@ -61,18 +61,28 @@ internal static class FilterGrammar
         .IgnoreThen(
             Parse.OneOf(
                 Span.EqualToIgnoreCase("link")
-                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Link)),
+                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Link))
+                    .Try(),
                 Span.EqualToIgnoreCase("embed")
-                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Embed)),
+                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Embed))
+                    .Try(),
                 Span.EqualToIgnoreCase("file")
-                    .IgnoreThen(Parse.Return(MessageContentMatchKind.File)),
+                    .IgnoreThen(Parse.Return(MessageContentMatchKind.File))
+                    .Try(),
                 Span.EqualToIgnoreCase("video")
-                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Video)),
+                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Video))
+                    .Try(),
                 Span.EqualToIgnoreCase("image")
-                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Image)),
+                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Image))
+                    .Try(),
                 Span.EqualToIgnoreCase("sound")
                     .IgnoreThen(Parse.Return(MessageContentMatchKind.Sound)),
-                Span.EqualToIgnoreCase("pin").IgnoreThen(Parse.Return(MessageContentMatchKind.Pin))
+                Span.EqualToIgnoreCase("pin")
+                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Pin))
+                    .Try(),
+                Span.EqualToIgnoreCase("invite")
+                    .IgnoreThen(Parse.Return(MessageContentMatchKind.Invite))
+                    .Try()
             )
         )
         .Select(k => (MessageFilter)new HasMessageFilter(k))