Convert several types to records

DiscordChatExporter.Cli.Tests/Utils/Pollyfills.cs

@@ -1,9 +0,0 @@
-// ReSharper disable CheckNamespace
-// TODO: remove after moving to .NET 5
-
-namespace System.Runtime.CompilerServices
-{
-    internal static class IsExternalInit
-    {
-    }
-}

DiscordChatExporter.Cli/Utils/Pollyfills.cs

@@ -1,9 +0,0 @@
-// ReSharper disable CheckNamespace
-// TODO: remove after moving to .NET 5
-
-namespace System.Runtime.CompilerServices
-{
-    internal static class IsExternalInit
-    {
-    }
-}

DiscordChatExporter.Core/Discord/AuthToken.cs

@@ -1,27 +1,13 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Net.Http.Headers;
+using System.Net.Http.Headers;
 
 namespace DiscordChatExporter.Core.Discord
 {
-    public class AuthToken
+    public record AuthToken(AuthTokenKind Kind, string Value)
     {
-        public AuthTokenKind Kind { get; }
-
-        public string Value { get; }
-
-        public AuthToken(AuthTokenKind kind, string value)
-        {
-            Kind = kind;
-            Value = value;
-        }
-
         public AuthenticationHeaderValue GetAuthenticationHeader() => Kind switch
         {
             AuthTokenKind.Bot => new AuthenticationHeaderValue("Bot", Value),
             _ => new AuthenticationHeaderValue(Value)
         };
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Value;
     }
 }

DiscordChatExporter.Core/Discord/Data/Attachment.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
@@ -10,20 +9,16 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/channel#attachment-object
-    public partial class Attachment : IHasId
+    public partial record Attachment(
+        Snowflake Id,
+        string Url,
+        string FileName,
+        int? Width,
+        int? Height,
+        FileSize FileSize) : IHasId
     {
-        public Snowflake Id { get; }
-
-        public string Url { get; }
-
-        public string FileName { get; }
-
         public string FileExtension => Path.GetExtension(FileName);
 
-        public int? Width { get; }
-
-        public int? Height { get; }
-
         public bool IsImage => FileFormat.IsImage(FileExtension);
 
         public bool IsVideo => FileFormat.IsVideo(FileExtension);
@@ -31,30 +26,9 @@ namespace DiscordChatExporter.Core.Discord.Data
         public bool IsAudio => FileFormat.IsAudio(FileExtension);
 
         public bool IsSpoiler => FileName.StartsWith("SPOILER_", StringComparison.Ordinal);
-
-        public FileSize FileSize { get; }
-
-        public Attachment(
-            Snowflake id,
-            string url,
-            string fileName,
-            int? width,
-            int? height,
-            FileSize fileSize)
-        {
-            Id = id;
-            Url = url;
-            FileName = fileName;
-            Width = width;
-            Height = height;
-            FileSize = fileSize;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => FileName;
     }
 
-    public partial class Attachment
+    public partial record Attachment
     {
         public static Attachment Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/Channel.cs

@@ -1,5 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
+using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
 using DiscordChatExporter.Core.Utils.Extensions;
@@ -9,12 +8,15 @@ using Tyrrrz.Extensions;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/channel#channel-object
-    public partial class Channel : IHasId
+    public partial record Channel(
+        Snowflake Id,
+        ChannelKind Kind,
+        Snowflake GuildId,
+        ChannelCategory Category,
+        string Name,
+        int? Position,
+        string? Topic) : IHasId
     {
-        public Snowflake Id { get; }
-
-        public ChannelKind Kind { get; }
-
         public bool IsTextChannel => Kind is
             ChannelKind.GuildTextChat or
             ChannelKind.DirectTextChat or
@@ -23,40 +25,9 @@ namespace DiscordChatExporter.Core.Discord.Data
             ChannelKind.GuildStore;
 
         public bool IsVoiceChannel => !IsTextChannel;
-
-        public Snowflake GuildId { get; }
-
-        public ChannelCategory Category { get; }
-
-        public string Name { get; }
-
-        public int? Position { get; }
-
-        public string? Topic { get; }
-
-        public Channel(
-            Snowflake id,
-            ChannelKind kind,
-            Snowflake guildId,
-            ChannelCategory category,
-            string name,
-            int? position,
-            string? topic)
-        {
-            Id = id;
-            Kind = kind;
-            GuildId = guildId;
-            Category = category;
-            Name = name;
-            Position = position;
-            Topic = topic;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Name;
     }
 
-    public partial class Channel
+    public partial record Channel
     {
         private static ChannelCategory GetFallbackCategory(ChannelKind channelKind) => new(
             Snowflake.Zero,
@@ -83,7 +54,8 @@ namespace DiscordChatExporter.Core.Discord.Data
                 // Guild channel
                 json.GetPropertyOrNull("name")?.GetStringOrNull() ??
                 // DM channel
-                json.GetPropertyOrNull("recipients")?.EnumerateArray().Select(User.Parse).Select(u => u.Name).JoinToString(", ") ??
+                json.GetPropertyOrNull("recipients")?.EnumerateArray().Select(User.Parse).Select(u => u.Name)
+                    .JoinToString(", ") ??
                 // Fallback
                 id.ToString();
 

DiscordChatExporter.Core/Discord/Data/ChannelCategory.cs

@@ -1,31 +1,11 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Text.Json;
+using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
 using DiscordChatExporter.Core.Utils.Extensions;
 using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Core.Discord.Data
 {
-    public partial class ChannelCategory : IHasId
-    {
-        public Snowflake Id { get; }
-
-        public string Name { get; }
-
-        public int? Position { get; }
-
-        public ChannelCategory(Snowflake id, string name, int? position)
-        {
-            Id = id;
-            Name = name;
-            Position = position;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Name;
-    }
-
-    public partial class ChannelCategory
+    public record ChannelCategory(Snowflake Id, string Name, int? Position) : IHasId
     {
         public static ChannelCategory Unknown { get; } = new(Snowflake.Zero, "<unknown category>", 0);
 

DiscordChatExporter.Core/Discord/Data/Common/FileSize.cs

@@ -4,16 +4,12 @@ using System.Diagnostics.CodeAnalysis;
 namespace DiscordChatExporter.Core.Discord.Data.Common
 {
     // Loosely based on https://github.com/omar/ByteSize (MIT license)
-    public readonly partial struct FileSize
+    public readonly partial record struct FileSize(long TotalBytes)
     {
-        public long TotalBytes { get; }
-
         public double TotalKiloBytes => TotalBytes / 1024.0;
         public double TotalMegaBytes => TotalKiloBytes / 1024.0;
         public double TotalGigaBytes => TotalMegaBytes / 1024.0;
 
-        public FileSize(long bytes) => TotalBytes = bytes;
-
         private double GetLargestWholeNumberValue()
         {
             if (Math.Abs(TotalGigaBytes) >= 1)
@@ -46,7 +42,7 @@ namespace DiscordChatExporter.Core.Discord.Data.Common
         public override string ToString() => $"{GetLargestWholeNumberValue():0.##} {GetLargestWholeNumberSymbol()}";
     }
 
-    public partial struct FileSize
+    public partial record struct FileSize
     {
         public static FileSize FromBytes(long bytes) => new(bytes);
     }

DiscordChatExporter.Core/Discord/Data/Common/IdBasedEqualityComparer.cs

@@ -2,15 +2,12 @@
 
 namespace DiscordChatExporter.Core.Discord.Data.Common
 {
-    public partial class IdBasedEqualityComparer : IEqualityComparer<IHasId>
+    public class IdBasedEqualityComparer : IEqualityComparer<IHasId>
     {
+        public static IdBasedEqualityComparer Instance { get; } = new();
+
         public bool Equals(IHasId? x, IHasId? y) => x?.Id == y?.Id;
 
         public int GetHashCode(IHasId obj) => obj.Id.GetHashCode();
     }
-
-    public partial class IdBasedEqualityComparer
-    {
-        public static IdBasedEqualityComparer Instance { get; } = new();
-    }
 }

DiscordChatExporter.Core/Discord/Data/Embeds/Embed.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
 using System.Drawing;
 using System.Linq;
 using System.Text.Json;
@@ -10,63 +9,29 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds
 {
     // https://discord.com/developers/docs/resources/channel#embed-object
-    public partial class Embed
+    public partial record Embed(
+        string? Title,
+        string? Url,
+        DateTimeOffset? Timestamp,
+        Color? Color,
+        EmbedAuthor? Author,
+        string? Description,
+        IReadOnlyList<EmbedField> Fields,
+        EmbedImage? Thumbnail,
+        EmbedImage? Image,
+        EmbedFooter? Footer)
     {
-        public string? Title { get; }
+        public PlainImageEmbedProjection? TryGetPlainImage() =>
+            PlainImageEmbedProjection.TryResolve(this);
 
-        public string? Url { get; }
+        public SpotifyTrackEmbedProjection? TryGetSpotifyTrack() =>
+            SpotifyTrackEmbedProjection.TryResolve(this);
 
-        public DateTimeOffset? Timestamp { get; }
-
-        public Color? Color { get; }
-
-        public EmbedAuthor? Author { get; }
-
-        public string? Description { get; }
-
-        public IReadOnlyList<EmbedField> Fields { get; }
-
-        public EmbedImage? Thumbnail { get; }
-
-        public EmbedImage? Image { get; }
-
-        public EmbedFooter? Footer { get; }
-
-        public Embed(
-            string? title,
-            string? url,
-            DateTimeOffset? timestamp,
-            Color? color,
-            EmbedAuthor? author,
-            string? description,
-            IReadOnlyList<EmbedField> fields,
-            EmbedImage? thumbnail,
-            EmbedImage? image,
-            EmbedFooter? footer)
-        {
-            Title = title;
-            Url = url;
-            Timestamp = timestamp;
-            Color = color;
-            Author = author;
-            Description = description;
-            Fields = fields;
-            Thumbnail = thumbnail;
-            Image = image;
-            Footer = footer;
-        }
-
-        public PlainImageEmbedProjection? TryGetPlainImage() => PlainImageEmbedProjection.TryResolve(this);
-
-        public SpotifyTrackEmbedProjection? TryGetSpotifyTrack() => SpotifyTrackEmbedProjection.TryResolve(this);
-
-        public YouTubeVideoEmbedProjection? TryGetYouTubeVideo() => YouTubeVideoEmbedProjection.TryResolve(this);
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Title ?? "<untitled embed>";
+        public YouTubeVideoEmbedProjection? TryGetYouTubeVideo() =>
+            YouTubeVideoEmbedProjection.TryResolve(this);
     }
 
-    public partial class Embed
+    public partial record Embed
     {
         public static Embed Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedAuthor.cs

@@ -1,33 +1,14 @@
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Core.Discord.Data.Embeds
 {
     // https://discord.com/developers/docs/resources/channel#embed-object-embed-author-structure
-    public partial class EmbedAuthor
-    {
-        public string? Name { get; }
-
-        public string? Url { get; }
-
-        public string? IconUrl { get; }
-
-        public string? IconProxyUrl { get; }
-
-        public EmbedAuthor(string? name, string? url, string? iconUrl, string? iconProxyUrl)
-        {
-            Name = name;
-            Url = url;
-            IconUrl = iconUrl;
-            IconProxyUrl = iconProxyUrl;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Name ?? "<unnamed author>";
-    }
-
-    public partial class EmbedAuthor
+    public record EmbedAuthor(
+        string? Name,
+        string? Url,
+        string? IconUrl,
+        string? IconProxyUrl)
     {
         public static EmbedAuthor Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedField.cs

@@ -1,4 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using DiscordChatExporter.Core.Utils.Extensions;
 using JsonExtensions.Reading;
@@ -6,26 +5,10 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds
 {
     // https://discord.com/developers/docs/resources/channel#embed-object-embed-field-structure
-    public partial class EmbedField
-    {
-        public string Name { get; }
-
-        public string Value { get; }
-
-        public bool IsInline { get; }
-
-        public EmbedField(string name, string value, bool isInline)
-        {
-            Name = name;
-            Value = value;
-            IsInline = isInline;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => $"{Name} | {Value}";
-    }
-
-    public partial class EmbedField
+    public record EmbedField(
+        string Name,
+        string Value,
+        bool IsInline)
     {
         public static EmbedField Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedFooter.cs

@@ -1,4 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using DiscordChatExporter.Core.Utils.Extensions;
 using JsonExtensions.Reading;
@@ -6,26 +5,10 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds
 {
     // https://discord.com/developers/docs/resources/channel#embed-object-embed-footer-structure
-    public partial class EmbedFooter
-    {
-        public string Text { get; }
-
-        public string? IconUrl { get; }
-
-        public string? IconProxyUrl { get; }
-
-        public EmbedFooter(string text, string? iconUrl, string? iconProxyUrl)
-        {
-            Text = text;
-            IconUrl = iconUrl;
-            IconProxyUrl = iconProxyUrl;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Text;
-    }
-
-    public partial class EmbedFooter
+    public record EmbedFooter(
+        string Text,
+        string? IconUrl,
+        string? IconProxyUrl)
     {
         public static EmbedFooter Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/Embeds/EmbedImage.cs

@@ -4,26 +4,11 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data.Embeds
 {
     // https://discord.com/developers/docs/resources/channel#embed-object-embed-image-structure
-    public partial class EmbedImage
-    {
-        public string? Url { get; }
-
-        public string? ProxyUrl { get; }
-
-        public int? Width { get; }
-
-        public int? Height { get; }
-
-        public EmbedImage(string? url, string? proxyUrl, int? width, int? height)
-        {
-            Url = url;
-            ProxyUrl = proxyUrl;
-            Height = height;
-            Width = width;
-        }
-    }
-
-    public partial class EmbedImage
+    public record EmbedImage(
+        string? Url,
+        string? ProxyUrl,
+        int? Width,
+        int? Height)
     {
         public static EmbedImage Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/Embeds/PlainImageEmbedProjection.cs

@@ -1,22 +1,11 @@
-using System.Diagnostics.CodeAnalysis;
-using System.IO;
+using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
 using DiscordChatExporter.Core.Utils;
 
 namespace DiscordChatExporter.Core.Discord.Data.Embeds
 {
-    public partial class PlainImageEmbedProjection
-    {
-        public string Url { get; }
-
-        public PlainImageEmbedProjection(string url) => Url = url;
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Url;
-    }
-
-    public partial class PlainImageEmbedProjection
+    public record PlainImageEmbedProjection(string Url)
     {
         public static PlainImageEmbedProjection? TryResolve(Embed embed)
         {

DiscordChatExporter.Core/Discord/Data/Embeds/SpotifyTrackEmbedProjection.cs

@@ -1,21 +1,13 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Text.RegularExpressions;
+using System.Text.RegularExpressions;
 
 namespace DiscordChatExporter.Core.Discord.Data.Embeds
 {
-    public partial class SpotifyTrackEmbedProjection
+    public partial record SpotifyTrackEmbedProjection(string TrackId)
     {
-        public string TrackId { get; }
-
         public string Url => $"https://open.spotify.com/embed/track/{TrackId}";
-
-        public SpotifyTrackEmbedProjection(string trackId) => TrackId = trackId;
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Url;
     }
 
-    public partial class SpotifyTrackEmbedProjection
+    public partial record SpotifyTrackEmbedProjection
     {
         private static string? TryParseTrackId(string embedUrl)
         {

DiscordChatExporter.Core/Discord/Data/Embeds/YouTubeVideoEmbedProjection.cs

@@ -1,21 +1,13 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Text.RegularExpressions;
+using System.Text.RegularExpressions;
 
 namespace DiscordChatExporter.Core.Discord.Data.Embeds
 {
-    public partial class YouTubeVideoEmbedProjection
+    public partial record YouTubeVideoEmbedProjection(string VideoId)
     {
-        public string VideoId { get; }
-
         public string Url => $"https://www.youtube.com/embed/{VideoId}";
-
-        public YouTubeVideoEmbedProjection(string videoId) => VideoId = videoId;
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Url;
     }
 
-    public partial class YouTubeVideoEmbedProjection
+    public partial record YouTubeVideoEmbedProjection
     {
         // Adapted from YoutubeExplode
         // https://github.com/Tyrrrz/YoutubeExplode/blob/5be164be20019783913f76fcc98f18c65aebe9f0/YoutubeExplode/Videos/VideoId.cs#L34-L64

DiscordChatExporter.Core/Discord/Data/Emoji.cs

@@ -1,5 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
+using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Core.Utils;
 using DiscordChatExporter.Core.Utils.Extensions;
@@ -9,36 +8,21 @@ using Tyrrrz.Extensions;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/emoji#emoji-object
-    public partial class Emoji
-    {
+    public partial record Emoji(
         // Only present on custom emoji
-        public string? Id { get; }
-
+        string? Id,
         // Name of custom emoji (e.g. LUL) or actual representation of standard emoji (e.g. 🙂)
-        public string Name { get; }
-
+        string Name,
+        bool IsAnimated,
+        string ImageUrl)
+    {
         // Name of custom emoji (e.g. LUL) or name of standard emoji (e.g. slight_smile)
         public string Code => !string.IsNullOrWhiteSpace(Id)
             ? Name
             : EmojiIndex.TryGetCode(Name) ?? Name;
-
-        public bool IsAnimated { get; }
-
-        public string ImageUrl { get; }
-
-        public Emoji(string? id, string name, bool isAnimated, string imageUrl)
-        {
-            Id = id;
-            Name = name;
-            IsAnimated = isAnimated;
-            ImageUrl = imageUrl;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Name;
     }
 
-    public partial class Emoji
+    public partial record Emoji
     {
         private static string GetTwemojiName(string name) => name
             .GetRunes()

DiscordChatExporter.Core/Discord/Data/Guild.cs

@@ -1,5 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Text.Json;
+using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
 using DiscordChatExporter.Core.Utils.Extensions;
 using JsonExtensions.Reading;
@@ -7,26 +6,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/guild#guild-object
-    public partial class Guild : IHasId
-    {
-        public Snowflake Id { get; }
-
-        public string Name { get; }
-
-        public string IconUrl { get; }
-
-        public Guild(Snowflake id, string name, string iconUrl)
-        {
-            Id = id;
-            Name = name;
-            IconUrl = iconUrl;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Name;
-    }
-
-    public partial class Guild
+    public record Guild(Snowflake Id, string Name, string IconUrl) : IHasId
     {
         public static Guild DirectMessages { get; } = new(
             Snowflake.Zero,

DiscordChatExporter.Core/Discord/Data/Member.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
@@ -10,28 +9,15 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/guild#guild-member-object
-    public partial class Member : IHasId
+    public partial record Member(
+        User User,
+        string Nick,
+        IReadOnlyList<Snowflake> RoleIds) : IHasId
     {
         public Snowflake Id => User.Id;
-
-        public User User { get; }
-
-        public string Nick { get; }
-
-        public IReadOnlyList<Snowflake> RoleIds { get; }
-
-        public Member(User user, string nick, IReadOnlyList<Snowflake> roleIds)
-        {
-            User = user;
-            Nick = nick;
-            RoleIds = roleIds;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Nick;
     }
 
-    public partial class Member
+    public partial record Member
     {
         public static Member CreateForUser(User user) => new(
             user,
@@ -44,9 +30,12 @@ namespace DiscordChatExporter.Core.Discord.Data
             var user = json.GetProperty("user").Pipe(User.Parse);
             var nick = json.GetPropertyOrNull("nick")?.GetStringOrNull();
 
-            var roleIds =
-                json.GetPropertyOrNull("roles")?.EnumerateArray().Select(j => j.GetNonWhiteSpaceString()).Select(Snowflake.Parse).ToArray() ??
-                Array.Empty<Snowflake>();
+            var roleIds = json
+                .GetPropertyOrNull("roles")?
+                .EnumerateArray()
+                .Select(j => j.GetNonWhiteSpaceString())
+                .Select(Snowflake.Parse)
+                .ToArray() ?? Array.Empty<Snowflake>();
 
             return new Member(
                 user,

DiscordChatExporter.Core/Discord/Data/Message.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
@@ -11,73 +10,21 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/channel#message-object
-    public partial class Message : IHasId
-    {
-        public Snowflake Id { get; }
-
-        public MessageKind Kind { get; }
-
-        public User Author { get; }
-
-        public DateTimeOffset Timestamp { get; }
-
-        public DateTimeOffset? EditedTimestamp { get; }
-
-        public DateTimeOffset? CallEndedTimestamp { get; }
-
-        public bool IsPinned { get; }
-
-        public string Content { get; }
-
-        public IReadOnlyList<Attachment> Attachments { get; }
-
-        public IReadOnlyList<Embed> Embeds { get; }
-
-        public IReadOnlyList<Reaction> Reactions { get; }
-
-        public IReadOnlyList<User> MentionedUsers { get; }
-
-        public MessageReference? Reference { get; }
-
-        public Message? ReferencedMessage { get; }
-
-        public Message(
-            Snowflake id,
-            MessageKind kind,
-            User author,
-            DateTimeOffset timestamp,
-            DateTimeOffset? editedTimestamp,
-            DateTimeOffset? callEndedTimestamp,
-            bool isPinned,
-            string content,
-            IReadOnlyList<Attachment> attachments,
-            IReadOnlyList<Embed> embeds,
-            IReadOnlyList<Reaction> reactions,
-            IReadOnlyList<User> mentionedUsers,
-            MessageReference? messageReference,
-            Message? referencedMessage)
-        {
-            Id = id;
-            Kind = kind;
-            Author = author;
-            Timestamp = timestamp;
-            EditedTimestamp = editedTimestamp;
-            CallEndedTimestamp = callEndedTimestamp;
-            IsPinned = isPinned;
-            Content = content;
-            Attachments = attachments;
-            Embeds = embeds;
-            Reactions = reactions;
-            MentionedUsers = mentionedUsers;
-            Reference = messageReference;
-            ReferencedMessage = referencedMessage;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Content;
-    }
-
-    public partial class Message
+    public record Message(
+        Snowflake Id,
+        MessageKind Kind,
+        User Author,
+        DateTimeOffset Timestamp,
+        DateTimeOffset? EditedTimestamp,
+        DateTimeOffset? CallEndedTimestamp,
+        bool IsPinned,
+        string Content,
+        IReadOnlyList<Attachment> Attachments,
+        IReadOnlyList<Embed> Embeds,
+        IReadOnlyList<Reaction> Reactions,
+        IReadOnlyList<User> MentionedUsers,
+        MessageReference? Reference,
+        Message? ReferencedMessage) : IHasId
     {
         public static Message Parse(JsonElement json)
         {
@@ -85,7 +32,8 @@ namespace DiscordChatExporter.Core.Discord.Data
             var author = json.GetProperty("author").Pipe(User.Parse);
             var timestamp = json.GetProperty("timestamp").GetDateTimeOffset();
             var editedTimestamp = json.GetPropertyOrNull("edited_timestamp")?.GetDateTimeOffset();
-            var callEndedTimestamp = json.GetPropertyOrNull("call")?.GetPropertyOrNull("ended_timestamp")?.GetDateTimeOffset();
+            var callEndedTimestamp = json.GetPropertyOrNull("call")?.GetPropertyOrNull("ended_timestamp")
+                ?.GetDateTimeOffset();
             var kind = (MessageKind)json.GetProperty("type").GetInt32();
             var isPinned = json.GetPropertyOrNull("pinned")?.GetBoolean() ?? false;
             var messageReference = json.GetPropertyOrNull("message_reference")?.Pipe(MessageReference.Parse);

DiscordChatExporter.Core/Discord/Data/MessageReference.cs

@@ -1,4 +1,3 @@
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using DiscordChatExporter.Core.Utils.Extensions;
 using JsonExtensions.Reading;
@@ -6,26 +5,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/channel#message-object-message-reference-structure
-    public partial class MessageReference
-    {
-        public Snowflake? MessageId { get; }
-
-        public Snowflake? ChannelId { get; }
-
-        public Snowflake? GuildId { get; }
-
-        public MessageReference(Snowflake? messageId, Snowflake? channelId, Snowflake? guildId)
-        {
-            MessageId = messageId;
-            ChannelId = channelId;
-            GuildId = guildId;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => MessageId?.ToString() ?? "<unknown reference>";
-    }
-
-    public partial class MessageReference
+    public record MessageReference(Snowflake? MessageId, Snowflake? ChannelId, Snowflake? GuildId)
     {
         public static MessageReference Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/Reaction.cs

@@ -1,27 +1,10 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Text.Json;
+using System.Text.Json;
 using DiscordChatExporter.Core.Utils.Extensions;
 
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/channel#reaction-object
-    public partial class Reaction
-    {
-        public Emoji Emoji { get; }
-
-        public int Count { get; }
-
-        public Reaction(Emoji emoji, int count)
-        {
-            Emoji = emoji;
-            Count = count;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => $"{Emoji} ({Count})";
-    }
-
-    public partial class Reaction
+    public record Reaction(Emoji Emoji, int Count)
     {
         public static Reaction Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/Role.cs

@@ -1,5 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Drawing;
+using System.Drawing;
 using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
 using DiscordChatExporter.Core.Utils.Extensions;
@@ -8,33 +7,7 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/topics/permissions#role-object
-    public partial class Role : IHasId
-    {
-        public Snowflake Id { get; }
-
-        public string Name { get; }
-
-        public int Position { get; }
-
-        public Color? Color { get; }
-
-        public Role(
-            Snowflake id,
-            string name,
-            int position,
-            Color? color)
-        {
-            Id = id;
-            Name = name;
-            Position = position;
-            Color = color;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Name;
-    }
-
-    public partial class Role
+    public record Role(Snowflake Id, string Name, int Position, Color? Color) : IHasId
     {
         public static Role Parse(JsonElement json)
         {

DiscordChatExporter.Core/Discord/Data/User.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Diagnostics.CodeAnalysis;
 using System.Text.Json;
 using DiscordChatExporter.Core.Discord.Data.Common;
 using DiscordChatExporter.Core.Utils.Extensions;
@@ -8,41 +7,19 @@ using JsonExtensions.Reading;
 namespace DiscordChatExporter.Core.Discord.Data
 {
     // https://discord.com/developers/docs/resources/user#user-object
-    public partial class User : IHasId
+    public partial record User(
+        Snowflake Id,
+        bool IsBot,
+        int Discriminator,
+        string Name,
+        string AvatarUrl) : IHasId
     {
-        public Snowflake Id { get; }
-
-        public bool IsBot { get; }
-
-        public int Discriminator { get; }
-
         public string DiscriminatorFormatted => $"{Discriminator:0000}";
 
-        public string Name { get; }
-
         public string FullName => $"{Name}#{DiscriminatorFormatted}";
-
-        public string AvatarUrl { get; }
-
-        public User(
-            Snowflake id,
-            bool isBot,
-            int discriminator,
-            string name,
-            string avatarUrl)
-        {
-            Id = id;
-            IsBot = isBot;
-            Discriminator = discriminator;
-            Name = name;
-            AvatarUrl = avatarUrl;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => FullName;
     }
 
-    public partial class User
+    public partial record User
     {
         private static string GetDefaultAvatarUrl(int discriminator) =>
             $"https://cdn.discordapp.com/embed/avatars/{discriminator % 5}.png";

DiscordChatExporter.Core/Discord/Snowflake.cs

@@ -5,29 +5,20 @@ using System.Text.RegularExpressions;
 
 namespace DiscordChatExporter.Core.Discord
 {
-    public readonly partial struct Snowflake
+    public readonly record struct Snowflake(ulong Value)
     {
-        public ulong Value { get; }
-
-        public Snowflake(ulong value) => Value = value;
-
         public DateTimeOffset ToDate() => DateTimeOffset.FromUnixTimeMilliseconds(
             (long)((Value >> 22) + 1420070400000UL)
         ).ToLocalTime();
 
         [ExcludeFromCodeCoverage]
         public override string ToString() => Value.ToString(CultureInfo.InvariantCulture);
-    }
 
-    public partial struct Snowflake
-    {
         public static Snowflake Zero { get; } = new(0);
 
-        public static Snowflake FromDate(DateTimeOffset date)
-        {
-            var value = ((ulong) date.ToUnixTimeMilliseconds() - 1420070400000UL) << 22;
-            return new Snowflake(value);
-        }
+        public static Snowflake FromDate(DateTimeOffset date) => new(
+            ((ulong)date.ToUnixTimeMilliseconds() - 1420070400000UL) << 22
+        );
 
         public static Snowflake? TryParse(string? str, IFormatProvider? formatProvider = null)
         {
@@ -35,8 +26,7 @@ namespace DiscordChatExporter.Core.Discord
                 return null;
 
             // As number
-            if (Regex.IsMatch(str, @"^\d+$") &&
-                ulong.TryParse(str, NumberStyles.Number, formatProvider, out var value))
+            if (Regex.IsMatch(str, @"^\d+$") && ulong.TryParse(str, NumberStyles.Number, formatProvider, out var value))
             {
                 return new Snowflake(value);
             }
@@ -55,19 +45,4 @@ namespace DiscordChatExporter.Core.Discord
 
         public static Snowflake Parse(string str) => Parse(str, null);
     }
-
-    public partial struct Snowflake : IComparable<Snowflake>, IEquatable<Snowflake>
-    {
-        public int CompareTo(Snowflake other) => Value.CompareTo(other.Value);
-
-        public bool Equals(Snowflake other) => CompareTo(other) == 0;
-
-        public override bool Equals(object? obj) => obj is Snowflake other && Equals(other);
-
-        public override int GetHashCode() => Value.GetHashCode();
-
-        public static bool operator ==(Snowflake left, Snowflake right) => left.Equals(right);
-
-        public static bool operator !=(Snowflake left, Snowflake right) => !(left == right);
-    }
 }

DiscordChatExporter.Core/Exporting/ExportRequest.cs

@@ -10,76 +10,35 @@ using DiscordChatExporter.Core.Utils;
 
 namespace DiscordChatExporter.Core.Exporting
 {
-    public partial class ExportRequest
+    public partial record ExportRequest(
+        Guild Guild,
+        Channel Channel,
+        string OutputPath,
+        ExportFormat Format,
+        Snowflake? After,
+        Snowflake? Before,
+        PartitionLimit PartitionLimit,
+        MessageFilter MessageFilter,
+        bool ShouldDownloadMedia,
+        bool ShouldReuseMedia,
+        string DateFormat)
     {
-        public Guild Guild { get; }
-
-        public Channel Channel { get; }
-
-        public string OutputPath { get; }
-
-        public string OutputBaseFilePath { get; }
-
-        public string OutputBaseDirPath { get; }
-
-        public string OutputMediaDirPath { get; }
-
-        public ExportFormat Format { get; }
-
-        public Snowflake? After { get; }
-
-        public Snowflake? Before { get; }
-
-        public PartitionLimit PartitionLimit { get; }
-
-        public MessageFilter MessageFilter { get; }
-
-        public bool ShouldDownloadMedia { get; }
-
-        public bool ShouldReuseMedia { get; }
-
-        public string DateFormat { get; }
-
-        public ExportRequest(
-            Guild guild,
-            Channel channel,
-            string outputPath,
-            ExportFormat format,
-            Snowflake? after,
-            Snowflake? before,
-            PartitionLimit partitionLimit,
-            MessageFilter messageFilter,
-            bool shouldDownloadMedia,
-            bool shouldReuseMedia,
-            string dateFormat)
-        {
-            Guild = guild;
-            Channel = channel;
-            OutputPath = outputPath;
-            Format = format;
-            After = after;
-            Before = before;
-            PartitionLimit = partitionLimit;
-            MessageFilter = messageFilter;
-            ShouldDownloadMedia = shouldDownloadMedia;
-            ShouldReuseMedia = shouldReuseMedia;
-            DateFormat = dateFormat;
-
-            OutputBaseFilePath = GetOutputBaseFilePath(
-                guild,
-                channel,
-                outputPath,
-                format,
-                after,
-                before
+        private string? _outputBaseFilePath;
+        public string OutputBaseFilePath => _outputBaseFilePath ??= GetOutputBaseFilePath(
+            Guild,
+            Channel,
+            OutputPath,
+            Format,
+            After,
+            Before
         );
 
-            OutputBaseDirPath = Path.GetDirectoryName(OutputBaseFilePath) ?? OutputPath;
-            OutputMediaDirPath = $"{OutputBaseFilePath}_Files{Path.DirectorySeparatorChar}";
-        }
+        public string OutputBaseDirPath => Path.GetDirectoryName(OutputBaseFilePath) ?? OutputPath;
+
+        public string OutputMediaDirPath => $"{OutputBaseFilePath}_Files{Path.DirectorySeparatorChar}";
     }
 
-    public partial class ExportRequest
+    public partial record ExportRequest
     {
         private static string GetOutputBaseFilePath(
             Guild guild,
@@ -140,17 +99,17 @@ namespace DiscordChatExporter.Core.Exporting
                 // Both 'after' and 'before' are set
                 if (after is not null && before is not null)
                 {
-                    buffer.Append($"{after?.ToDate():yyyy-MM-dd} to {before?.ToDate():yyyy-MM-dd}");
+                    buffer.Append($"{after.Value.ToDate():yyyy-MM-dd} to {before.Value.ToDate():yyyy-MM-dd}");
                 }
                 // Only 'after' is set
                 else if (after is not null)
                 {
-                    buffer.Append($"after {after?.ToDate():yyyy-MM-dd}");
+                    buffer.Append($"after {after.Value.ToDate():yyyy-MM-dd}");
                 }
                 // Only 'before' is set
-                else
+                else if (before is not null)
                 {
-                    buffer.Append($"before {before?.ToDate():yyyy-MM-dd}");
+                    buffer.Append($"before {before.Value.ToDate():yyyy-MM-dd}");
                 }
 
                 buffer.Append(")");

DiscordChatExporter.Core/Markdown/EmojiNode.cs

@@ -1,38 +1,24 @@
-using System.Diagnostics.CodeAnalysis;
-using DiscordChatExporter.Core.Utils;
+using DiscordChatExporter.Core.Utils;
 
 namespace DiscordChatExporter.Core.Markdown
 {
-    internal class EmojiNode : MarkdownNode
-    {
+    internal record EmojiNode(
         // Only present on custom emoji
-        public string? Id { get; }
-
+        string? Id,
         // Name of custom emoji (e.g. LUL) or actual representation of standard emoji (e.g. 🙂)
-        public string Name { get; }
-
+        string Name,
+        bool IsAnimated) : MarkdownNode
+    {
         // Name of custom emoji (e.g. LUL) or name of standard emoji (e.g. slight_smile)
         public string Code => !string.IsNullOrWhiteSpace(Id)
             ? Name
             : EmojiIndex.TryGetCode(Name) ?? Name;
 
-        public bool IsAnimated { get; }
-
         public bool IsCustomEmoji => !string.IsNullOrWhiteSpace(Id);
 
-        public EmojiNode(string? id, string name, bool isAnimated)
-        {
-            Id = id;
-            Name = name;
-            IsAnimated = isAnimated;
-        }
-
         public EmojiNode(string name)
             : this(null, name, false)
         {
         }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => $"<Emoji> {Name}";
     }
 }

DiscordChatExporter.Core/Markdown/FormattingNode.cs

@@ -1,29 +1,6 @@
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
 
 namespace DiscordChatExporter.Core.Markdown
 {
-    internal class FormattingNode : MarkdownNode
-    {
-        public FormattingKind Kind { get; }
-
-        public IReadOnlyList<MarkdownNode> Children { get; }
-
-        public FormattingNode(FormattingKind kind, IReadOnlyList<MarkdownNode> children)
-        {
-            Kind = kind;
-            Children = children;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString()
-        {
-            var childrenFormatted = Children.Count == 1
-                ? Children.Single().ToString()
-                : "+" + Children.Count;
-
-            return $"<{Kind}> ({childrenFormatted})";
-        }
-    }
+    internal record FormattingNode(FormattingKind Kind, IReadOnlyList<MarkdownNode> Children) : MarkdownNode;
 }

DiscordChatExporter.Core/Markdown/InlineCodeBlockNode.cs

@@ -1,17 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-
-namespace DiscordChatExporter.Core.Markdown
+namespace DiscordChatExporter.Core.Markdown
 {
-    internal class InlineCodeBlockNode : MarkdownNode
-    {
-        public string Code { get; }
-
-        public InlineCodeBlockNode(string code)
-        {
-            Code = code;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => $"<Code> {Code}";
-    }
+    internal record InlineCodeBlockNode(string Code) : MarkdownNode;
 }

DiscordChatExporter.Core/Markdown/LinkNode.cs

@@ -1,34 +1,14 @@
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
 
 namespace DiscordChatExporter.Core.Markdown
 {
-    internal class LinkNode : MarkdownNode
+    internal record LinkNode(
+        string Url,
+        IReadOnlyList<MarkdownNode> Children) : MarkdownNode
     {
-        public string Url { get; }
-
-        public IReadOnlyList<MarkdownNode> Children { get; }
-
-        public LinkNode(string url, IReadOnlyList<MarkdownNode> children)
-        {
-            Url = url;
-            Children = children;
-        }
-
         public LinkNode(string url)
             : this(url, new[] { new TextNode(url) })
         {
         }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString()
-        {
-            var childrenFormatted = Children.Count == 1
-                ? Children.Single().ToString()
-                : "+" + Children.Count;
-
-            return $"<Link> ({childrenFormatted})";
-        }
     }
 }

DiscordChatExporter.Core/Markdown/MarkdownNode.cs

@@ -1,6 +1,4 @@
 namespace DiscordChatExporter.Core.Markdown
 {
-    internal abstract class MarkdownNode
-    {
-    }
+    internal abstract record MarkdownNode;
 }

DiscordChatExporter.Core/Markdown/MentionNode.cs

@@ -1,20 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-
-namespace DiscordChatExporter.Core.Markdown
+namespace DiscordChatExporter.Core.Markdown
 {
-    internal class MentionNode : MarkdownNode
-    {
-        public string Id { get; }
-
-        public MentionKind Kind { get; }
-
-        public MentionNode(string id, MentionKind kind)
-        {
-            Id = id;
-            Kind = kind;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => $"<{Kind} mention> {Id}";
-    }
+    internal record MentionNode(string Id, MentionKind Kind) : MarkdownNode;
 }

DiscordChatExporter.Core/Markdown/MultiLineCodeBlockNode.cs

@@ -1,20 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-
-namespace DiscordChatExporter.Core.Markdown
+namespace DiscordChatExporter.Core.Markdown
 {
-    internal class MultiLineCodeBlockNode : MarkdownNode
-    {
-        public string Language { get; }
-
-        public string Code { get; }
-
-        public MultiLineCodeBlockNode(string language, string code)
-        {
-            Language = language;
-            Code = code;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => $"<{Language}> {Code}";
-    }
+    internal record MultiLineCodeBlockNode(string Language, string Code) : MarkdownNode;
 }

DiscordChatExporter.Core/Markdown/Parsing/StringPart.cs

@@ -2,23 +2,10 @@
 
 namespace DiscordChatExporter.Core.Markdown.Parsing
 {
-    internal readonly struct StringPart
+    internal readonly record struct StringPart(string Target, int StartIndex, int Length)
     {
-        public string Target { get; }
-
-        public int StartIndex { get; }
-
-        public int Length { get; }
-
         public int EndIndex => StartIndex + Length;
 
-        public StringPart(string target, int startIndex, int length)
-        {
-            Target = target;
-            StartIndex = startIndex;
-            Length = length;
-        }
-
         public StringPart(string target)
             : this(target, 0, target.Length)
         {

DiscordChatExporter.Core/Markdown/TextNode.cs

@@ -1,17 +1,4 @@
-using System.Diagnostics.CodeAnalysis;
-
-namespace DiscordChatExporter.Core.Markdown
+namespace DiscordChatExporter.Core.Markdown
 {
-    internal class TextNode : MarkdownNode
-    {
-        public string Text { get; }
-
-        public TextNode(string text)
-        {
-            Text = text;
-        }
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Text;
-    }
+    internal record TextNode(string Text) : MarkdownNode;
 }

DiscordChatExporter.Core/Markdown/UnixTimestampNode.cs

@@ -1,15 +1,6 @@
 using System;
-using System.Diagnostics.CodeAnalysis;
 
 namespace DiscordChatExporter.Core.Markdown
 {
-    internal class UnixTimestampNode : MarkdownNode
-    {
-        public DateTimeOffset Value { get; }
-
-        public UnixTimestampNode(DateTimeOffset value) => Value = value;
-
-        [ExcludeFromCodeCoverage]
-        public override string ToString() => Value.ToString();
-    }
+    internal record UnixTimestampNode(DateTimeOffset Value) : MarkdownNode;
 }

DiscordChatExporter.Core/Utils/Polyfills.cs

@@ -1,9 +0,0 @@
-// ReSharper disable CheckNamespace
-// TODO: remove after moving to .NET 5
-
-namespace System.Runtime.CompilerServices
-{
-    internal static class IsExternalInit
-    {
-    }
-}

DiscordChatExporter.Gui/Services/SettingsService.cs

@@ -1,6 +1,5 @@
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Exporting;
-using DiscordChatExporter.Core.Exporting.Partitioning;
 using Tyrrrz.Settings;
 
 namespace DiscordChatExporter.Gui.Services