Embrace Snowflake as first class citizen

DiscordChatExporter.Cli/Commands/Base/ExportCommandBase.cs

@@ -1,49 +1,40 @@
-using System;
+using System.IO;
-using System.IO;
-using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using CliFx;
 using CliFx.Attributes;
 using CliFx.Exceptions;
 using CliFx.Utilities;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exporting;
 
 namespace DiscordChatExporter.Cli.Commands.Base
 {
-    public abstract partial class ExportCommandBase : TokenCommandBase
+    public abstract class ExportCommandBase : TokenCommandBase
     {
-        [CommandOption("output", 'o',
+        [CommandOption("output", 'o', Description = "Output file or directory path.")]
-            Description = "Output file or directory path.")]
+        public string OutputPath { get; init; } = Directory.GetCurrentDirectory();
-        public string OutputPath { get; set; } = Directory.GetCurrentDirectory();
 
-        [CommandOption("format", 'f',
+        [CommandOption("format", 'f', Description = "Export format.")]
-            Description = "Export format.")]
+        public ExportFormat ExportFormat { get; init; } = ExportFormat.HtmlDark;
-        public ExportFormat ExportFormat { get; set; } = ExportFormat.HtmlDark;
 
-        [CommandOption("after",
+        [CommandOption("after", Description = "Only include messages sent after this date or message ID.")]
-            Description = "Only include messages sent after this date. Alternatively, provide the ID of a message.")]
+        public Snowflake? After { get; init; }
-        public string? After { get; set; }
 
-        [CommandOption("before",
+        [CommandOption("before", Description = "Only include messages sent before this date or message ID.")]
-            Description = "Only include messages sent before this date. Alternatively, provide the ID of a message.")]
+        public Snowflake? Before { get; init; }
-        public string? Before { get; set; }
 
-        [CommandOption("partition", 'p',
+        [CommandOption("partition", 'p', Description = "Split output into partitions limited to this number of messages.")]
-            Description = "Split output into partitions limited to this number of messages.")]
+        public int? PartitionLimit { get; init; }
-        public int? PartitionLimit { get; set; }
 
-        [CommandOption("media",
+        [CommandOption("media", Description = "Download referenced media content.")]
-            Description = "Download referenced media content.")]
+        public bool ShouldDownloadMedia { get; init; }
-        public bool ShouldDownloadMedia { get; set; }
 
-        [CommandOption("reuse-media",
+        [CommandOption("reuse-media", Description = "Reuse already existing media content to skip redundant downloads.")]
-            Description = "Reuse already existing media content to skip redundant downloads.")]
+        public bool ShouldReuseMedia { get; init; }
-        public bool ShouldReuseMedia { get; set; }
 
-        [CommandOption("dateformat",
+        [CommandOption("dateformat", Description = "Format used when writing dates.")]
-            Description = "Format used when writing dates.")]
+        public string DateFormat { get; init; } = "dd-MMM-yy hh:mm tt";
-        public string DateFormat { get; set; } = "dd-MMM-yy hh:mm tt";
 
         protected ChannelExporter GetChannelExporter() => new(GetDiscordClient());
 
@@ -57,8 +48,8 @@ namespace DiscordChatExporter.Cli.Commands.Base
                 channel,
                 OutputPath,
                 ExportFormat,
-                ParseRangeOption(After, "--after"),
+                After,
-                ParseRangeOption(Before, "--before"),
+                Before,
                 PartitionLimit,
                 ShouldDownloadMedia,
                 ShouldReuseMedia,
@@ -77,7 +68,7 @@ namespace DiscordChatExporter.Cli.Commands.Base
             await ExportAsync(console, guild, channel);
         }
 
-        protected async ValueTask ExportAsync(IConsole console, string channelId)
+        protected async ValueTask ExportAsync(IConsole console, Snowflake channelId)
         {
             var channel = await GetDiscordClient().GetChannelAsync(channelId);
             await ExportAsync(console, channel);
@@ -93,29 +84,4 @@ namespace DiscordChatExporter.Cli.Commands.Base
             return default;
         }
     }
-
-    public abstract partial class ExportCommandBase : TokenCommandBase
-    {
-        protected static DateTimeOffset? ParseRangeOption(string? value, string optionName)
-        {
-            if (value == null) return null;
-
-            var isSnowflake = Regex.IsMatch(value, @"^\d{18}$");
-            var isDate = DateTimeOffset.TryParse(value, out var datetime);
-
-            if (!isSnowflake && !isDate)
-            {
-                throw new ArgumentException($"Value for ${optionName} must be either a date or a message ID.");
-            }
-
-            return isSnowflake ? ExtractDateTimeFromSnowflake() : datetime;
-
-            DateTimeOffset ExtractDateTimeFromSnowflake()
-            {
-                var unixTimestampMs = (long.Parse(value) / 4194304 + 1420070400000);
-                return DateTimeOffset.FromUnixTimeMilliseconds(unixTimestampMs);
-            }
-        }
-    }
-
 }

DiscordChatExporter.Cli/Commands/Base/ExportMultipleCommandBase.cs

@@ -17,9 +17,8 @@ namespace DiscordChatExporter.Cli.Commands.Base
 {
     public abstract class ExportMultipleCommandBase : ExportCommandBase
     {
-        [CommandOption("parallel",
+        [CommandOption("parallel", Description = "Limits how many channels can be exported in parallel.")]
-            Description = "Limits how many channels can be exported in parallel.")]
+        public int ParallelLimit { get; init; } = 1;
-        public int ParallelLimit { get; set; } = 1;
 
         protected async ValueTask ExportMultipleAsync(IConsole console, IReadOnlyList<Channel> channels)
         {
@@ -47,8 +46,8 @@ namespace DiscordChatExporter.Cli.Commands.Base
                         channel,
                         OutputPath,
                         ExportFormat,
-                        ParseRangeOption(After, "--after"),
+                        After,
-                        ParseRangeOption(Before, "--before"),
+                        Before,
                         PartitionLimit,
                         ShouldDownloadMedia,
                         ShouldReuseMedia,

DiscordChatExporter.Cli/Commands/Base/TokenCommandBase.cs

@@ -7,15 +7,11 @@ namespace DiscordChatExporter.Cli.Commands.Base
 {
     public abstract class TokenCommandBase : ICommand
     {
-        [CommandOption("token", 't', IsRequired = true,
+        [CommandOption("token", 't', IsRequired = true, EnvironmentVariableName = "DISCORD_TOKEN", Description = "Authorization token.")]
-            EnvironmentVariableName = "DISCORD_TOKEN",
+        public string TokenValue { get; init; } = "";
-            Description = "Authorization token.")]
-        public string TokenValue { get; set; } = "";
 
-        [CommandOption("bot", 'b',
+        [CommandOption("bot", 'b', EnvironmentVariableName = "DISCORD_TOKEN_BOT", Description = "Authorize as a bot.")]
-            EnvironmentVariableName = "DISCORD_TOKEN_BOT",
+        public bool IsBotToken { get; init; }
-            Description = "Authorize as a bot.")]
-        public bool IsBotToken { get; set; }
 
         protected AuthToken GetAuthToken() => new(
             IsBotToken

DiscordChatExporter.Cli/Commands/ExportAllCommand.cs

@@ -10,9 +10,8 @@ namespace DiscordChatExporter.Cli.Commands
     [Command("exportall", Description = "Export all accessible channels.")]
     public class ExportAllCommand : ExportMultipleCommandBase
     {
-        [CommandOption("include-dm",
+        [CommandOption("include-dm", Description = "Include direct message channels.")]
-            Description = "Include direct message channels.")]
+        public bool IncludeDirectMessages { get; init; } = true;
-        public bool IncludeDirectMessages { get; set; } = true;
 
         public override async ValueTask ExecuteAsync(IConsole console)
         {

DiscordChatExporter.Cli/Commands/ExportChannelCommand.cs

@@ -2,15 +2,15 @@
 using CliFx;
 using CliFx.Attributes;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Domain.Discord;
 
 namespace DiscordChatExporter.Cli.Commands
 {
     [Command("export", Description = "Export a channel.")]
     public class ExportChannelCommand : ExportCommandBase
     {
-        [CommandOption("channel", 'c', IsRequired = true,
+        [CommandOption("channel", 'c', IsRequired = true, Description = "Channel ID.")]
-            Description = "Channel ID.")]
+        public Snowflake ChannelId { get; init; }
-        public string ChannelId { get; set; } = "";
 
         public override async ValueTask ExecuteAsync(IConsole console)
         {

DiscordChatExporter.Cli/Commands/ExportGuildCommand.cs

@@ -2,6 +2,7 @@
 using CliFx;
 using CliFx.Attributes;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Utilities;
 
 namespace DiscordChatExporter.Cli.Commands
@@ -9,9 +10,8 @@ namespace DiscordChatExporter.Cli.Commands
     [Command("exportguild", Description = "Export all channels within specified guild.")]
     public class ExportGuildCommand : ExportMultipleCommandBase
     {
-        [CommandOption("guild", 'g', IsRequired = true,
+        [CommandOption("guild", 'g', IsRequired = true, Description = "Guild ID.")]
-            Description = "Guild ID.")]
+        public Snowflake GuildId { get; init; }
-        public string GuildId { get; set; } = "";
 
         public override async ValueTask ExecuteAsync(IConsole console)
         {

DiscordChatExporter.Cli/Commands/GetChannelsCommand.cs

@@ -3,6 +3,7 @@ using System.Threading.Tasks;
 using CliFx;
 using CliFx.Attributes;
 using DiscordChatExporter.Cli.Commands.Base;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Utilities;
 
 namespace DiscordChatExporter.Cli.Commands
@@ -10,9 +11,8 @@ namespace DiscordChatExporter.Cli.Commands
     [Command("channels", Description = "Get the list of channels in a guild.")]
     public class GetChannelsCommand : TokenCommandBase
     {
-        [CommandOption("guild", 'g', IsRequired = true,
+        [CommandOption("guild", 'g', IsRequired = true, Description = "Guild ID.")]
-            Description = "Guild ID.")]
+        public Snowflake GuildId { get; init; }
-        public string GuildId { get; set; } = "";
 
         public override async ValueTask ExecuteAsync(IConsole console)
         {

DiscordChatExporter.Cli/Internal/Pollyfills.cs

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

DiscordChatExporter.Domain/Discord/DiscordClient.cs

@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exceptions;
 using DiscordChatExporter.Domain.Internal;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 using JsonExtensions.Http;
 using JsonExtensions.Reading;
 
@@ -70,13 +70,14 @@ namespace DiscordChatExporter.Domain.Discord
         {
             yield return Guild.DirectMessages;
 
-            var afterId = "";
+            var currentAfter = Snowflake.Zero;
+
             while (true)
             {
                 var url = new UrlBuilder()
                     .SetPath("users/@me/guilds")
                     .SetQueryParameter("limit", "100")
-                    .SetQueryParameter("after", afterId)
+                    .SetQueryParameter("after", currentAfter.ToString())
                     .Build();
 
                 var response = await GetJsonResponseAsync(url);
@@ -86,7 +87,7 @@ namespace DiscordChatExporter.Domain.Discord
                 {
                     yield return guild;
 
-                    afterId = guild.Id;
+                    currentAfter = guild.Id;
                     isEmpty = false;
                 }
 
@@ -95,7 +96,7 @@ namespace DiscordChatExporter.Domain.Discord
             }
         }
 
-        public async ValueTask<Guild> GetGuildAsync(string guildId)
+        public async ValueTask<Guild> GetGuildAsync(Snowflake guildId)
         {
             if (guildId == Guild.DirectMessages.Id)
                 return Guild.DirectMessages;
@@ -104,7 +105,7 @@ namespace DiscordChatExporter.Domain.Discord
             return Guild.Parse(response);
         }
 
-        public async IAsyncEnumerable<Channel> GetGuildChannelsAsync(string guildId)
+        public async IAsyncEnumerable<Channel> GetGuildChannelsAsync(Snowflake guildId)
         {
             if (guildId == Guild.DirectMessages.Id)
             {
@@ -141,7 +142,7 @@ namespace DiscordChatExporter.Domain.Discord
             }
         }
 
-        public async IAsyncEnumerable<Role> GetGuildRolesAsync(string guildId)
+        public async IAsyncEnumerable<Role> GetGuildRolesAsync(Snowflake guildId)
         {
             if (guildId == Guild.DirectMessages.Id)
                 yield break;
@@ -152,7 +153,7 @@ namespace DiscordChatExporter.Domain.Discord
                 yield return Role.Parse(roleJson);
         }
 
-        public async ValueTask<Member?> TryGetGuildMemberAsync(string guildId, User user)
+        public async ValueTask<Member?> TryGetGuildMemberAsync(Snowflake guildId, User user)
         {
             if (guildId == Guild.DirectMessages.Id)
                 return Member.CreateForUser(user);
@@ -161,30 +162,31 @@ namespace DiscordChatExporter.Domain.Discord
             return response?.Pipe(Member.Parse);
         }
 
-        private async ValueTask<string> GetChannelCategoryAsync(string channelParentId)
+        private async ValueTask<string> GetChannelCategoryAsync(Snowflake channelParentId)
         {
             var response = await GetJsonResponseAsync($"channels/{channelParentId}");
             return response.GetProperty("name").GetString();
         }
 
-        public async ValueTask<Channel> GetChannelAsync(string channelId)
+        public async ValueTask<Channel> GetChannelAsync(Snowflake channelId)
         {
             var response = await GetJsonResponseAsync($"channels/{channelId}");
 
-            var parentId = response.GetPropertyOrNull("parent_id")?.GetString();
+            var parentId = response.GetPropertyOrNull("parent_id")?.GetString().Pipe(Snowflake.Parse);
-            var category = !string.IsNullOrWhiteSpace(parentId)
+
-                ? await GetChannelCategoryAsync(parentId)
+            var category = parentId != null
+                ? await GetChannelCategoryAsync(parentId.Value)
                 : null;
 
             return Channel.Parse(response, category);
         }
 
-        private async ValueTask<Message?> TryGetLastMessageAsync(string channelId, DateTimeOffset? before = null)
+        private async ValueTask<Message?> TryGetLastMessageAsync(Snowflake channelId, Snowflake? before = null)
         {
             var url = new UrlBuilder()
                 .SetPath($"channels/{channelId}/messages")
                 .SetQueryParameter("limit", "1")
-                .SetQueryParameter("before", before?.ToSnowflake())
+                .SetQueryParameter("before", before?.ToString())
                 .Build();
 
             var response = await GetJsonResponseAsync(url);
@@ -192,9 +194,9 @@ namespace DiscordChatExporter.Domain.Discord
         }
 
         public async IAsyncEnumerable<Message> GetMessagesAsync(
-            string channelId,
+            Snowflake channelId,
-            DateTimeOffset? after = null,
+            Snowflake? after = null,
-            DateTimeOffset? before = null,
+            Snowflake? before = null,
             IProgress<double>? progress = null)
         {
             // Get the last message in the specified range.
@@ -202,19 +204,19 @@ namespace DiscordChatExporter.Domain.Discord
             // will not appear in the output.
             // Additionally, it provides the date of the last message, which is used to calculate progress.
             var lastMessage = await TryGetLastMessageAsync(channelId, before);
-            if (lastMessage == null || lastMessage.Timestamp < after)
+            if (lastMessage == null || lastMessage.Timestamp < after?.ToDate())
                 yield break;
 
             // Keep track of first message in range in order to calculate progress
             var firstMessage = default(Message);
-            var afterId = after?.ToSnowflake() ?? "0";
+            var currentAfter = after ?? Snowflake.Zero;
 
             while (true)
             {
                 var url = new UrlBuilder()
                     .SetPath($"channels/{channelId}/messages")
                     .SetQueryParameter("limit", "100")
-                    .SetQueryParameter("after", afterId)
+                    .SetQueryParameter("after", currentAfter.ToString())
                     .Build();
 
                 var response = await GetJsonResponseAsync(url);
@@ -244,7 +246,7 @@ namespace DiscordChatExporter.Domain.Discord
                     );
 
                     yield return message;
-                    afterId = message.Id;
+                    currentAfter = message.Id;
                 }
             }
         }

DiscordChatExporter.Domain/Discord/Models/Attachment.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Domain.Discord.Models
@@ -11,7 +11,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
     // https://discord.com/developers/docs/resources/channel#attachment-object
     public partial class Attachment : IHasId
     {
-        public string Id { get; }
+        public Snowflake Id { get; }
 
         public string Url { get; }
 
@@ -32,7 +32,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
         public FileSize FileSize { get; }
 
-        public Attachment(string id, string url, string fileName, int? width, int? height, FileSize fileSize)
+        public Attachment(Snowflake id, string url, string fileName, int? width, int? height, FileSize fileSize)
         {
             Id = id;
             Url = url;
@@ -58,7 +58,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
         public static Attachment Parse(JsonElement json)
         {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
             var url = json.GetProperty("url").GetString();
             var width = json.GetPropertyOrNull("width")?.GetInt32();
             var height = json.GetPropertyOrNull("height")?.GetInt32();

DiscordChatExporter.Domain/Discord/Models/Channel.cs

@@ -1,6 +1,7 @@
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
+using DiscordChatExporter.Domain.Utilities;
 using JsonExtensions.Reading;
 using Tyrrrz.Extensions;
 
@@ -22,7 +23,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
     // https://discord.com/developers/docs/resources/channel#channel-object
     public partial class Channel : IHasId
     {
-        public string Id { get; }
+        public Snowflake Id { get; }
 
         public ChannelType Type { get; }
 
@@ -33,7 +34,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
             Type == ChannelType.GuildNews ||
             Type == ChannelType.GuildStore;
 
-        public string GuildId { get; }
+        public Snowflake GuildId { get; }
 
         public string Category { get; }
 
@@ -41,7 +42,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
         public string? Topic { get; }
 
-        public Channel(string id, ChannelType type, string guildId, string category, string name, string? topic)
+        public Channel(Snowflake id, ChannelType type, Snowflake guildId, string category, string name, string? topic)
         {
             Id = id;
             Type = type;
@@ -68,8 +69,8 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
         public static Channel Parse(JsonElement json, string? category = null)
         {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
-            var guildId = json.GetPropertyOrNull("guild_id")?.GetString();
+            var guildId = json.GetPropertyOrNull("guild_id")?.GetString().Pipe(Snowflake.Parse);
             var topic = json.GetPropertyOrNull("topic")?.GetString();
 
             var type = (ChannelType) json.GetProperty("type").GetInt32();
@@ -77,7 +78,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
             var name =
                 json.GetPropertyOrNull("name")?.GetString() ??
                 json.GetPropertyOrNull("recipients")?.EnumerateArray().Select(User.Parse).Select(u => u.Name).JoinToString(", ") ??
-                id;
+                id.ToString();
 
             return new Channel(
                 id,

DiscordChatExporter.Domain/Discord/Models/Common/IHasId.cs

@@ -2,6 +2,6 @@
 {
     public interface IHasId
     {
-        string Id { get; }
+        Snowflake Id { get; }
     }
 }

DiscordChatExporter.Domain/Discord/Models/Common/IdBasedEqualityComparer.cs

@@ -5,9 +5,9 @@ namespace DiscordChatExporter.Domain.Discord.Models.Common
 {
     public partial class IdBasedEqualityComparer : IEqualityComparer<IHasId>
     {
-        public bool Equals(IHasId? x, IHasId? y) => StringComparer.Ordinal.Equals(x?.Id, y?.Id);
+        public bool Equals(IHasId? x, IHasId? y) => x?.Id == y?.Id;
 
-        public int GetHashCode(IHasId obj) => StringComparer.Ordinal.GetHashCode(obj.Id);
+        public int GetHashCode(IHasId obj) => obj.Id.GetHashCode();
     }
 
     public partial class IdBasedEqualityComparer

DiscordChatExporter.Domain/Discord/Models/Embed.cs

@@ -4,6 +4,7 @@ using System.Drawing;
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Domain.Discord.Models

DiscordChatExporter.Domain/Discord/Models/Guild.cs

@@ -1,18 +1,19 @@
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
+using DiscordChatExporter.Domain.Utilities;
 
 namespace DiscordChatExporter.Domain.Discord.Models
 {
     // https://discord.com/developers/docs/resources/guild#guild-object
     public partial class Guild : IHasId
     {
-        public string Id { get; }
+        public Snowflake Id { get; }
 
         public string Name { get; }
 
         public string IconUrl { get; }
 
-        public Guild(string id, string name, string iconUrl)
+        public Guild(Snowflake id, string name, string iconUrl)
         {
             Id = id;
             Name = name;
@@ -24,17 +25,17 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
     public partial class Guild
     {
-        public static Guild DirectMessages { get; } = new("@me", "Direct Messages", GetDefaultIconUrl());
+        public static Guild DirectMessages { get; } = new(Snowflake.Zero, "Direct Messages", GetDefaultIconUrl());
 
         private static string GetDefaultIconUrl() =>
             "https://cdn.discordapp.com/embed/avatars/0.png";
 
-        private static string GetIconUrl(string id, string iconHash) =>
+        private static string GetIconUrl(Snowflake id, string iconHash) =>
             $"https://cdn.discordapp.com/icons/{id}/{iconHash}.png";
 
         public static Guild Parse(JsonElement json)
         {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
             var name = json.GetProperty("name").GetString();
             var iconHash = json.GetProperty("icon").GetString();
 

DiscordChatExporter.Domain/Discord/Models/Member.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Domain.Discord.Models
@@ -11,15 +11,15 @@ namespace DiscordChatExporter.Domain.Discord.Models
     // https://discord.com/developers/docs/resources/guild#guild-member-object
     public partial class Member : IHasId
     {
-        public string Id => User.Id;
+        public Snowflake Id => User.Id;
 
         public User User { get; }
 
         public string Nick { get; }
 
-        public IReadOnlyList<string> RoleIds { get; }
+        public IReadOnlyList<Snowflake> RoleIds { get; }
 
-        public Member(User user, string? nick, IReadOnlyList<string> roleIds)
+        public Member(User user, string? nick, IReadOnlyList<Snowflake> roleIds)
         {
             User = user;
             Nick = nick ?? user.Name;
@@ -31,7 +31,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
     public partial class Member
     {
-        public static Member CreateForUser(User user) => new(user, null, Array.Empty<string>());
+        public static Member CreateForUser(User user) => new(user, null, Array.Empty<Snowflake>());
 
         public static Member Parse(JsonElement json)
         {
@@ -39,8 +39,8 @@ namespace DiscordChatExporter.Domain.Discord.Models
             var nick = json.GetPropertyOrNull("nick")?.GetString();
 
             var roleIds =
-                json.GetPropertyOrNull("roles")?.EnumerateArray().Select(j => j.GetString()).ToArray() ??
+                json.GetPropertyOrNull("roles")?.EnumerateArray().Select(j => j.GetString().Pipe(Snowflake.Parse)).ToArray() ??
-                Array.Empty<string>();
+                Array.Empty<Snowflake>();
 
             return new Member(
                 user,

DiscordChatExporter.Domain/Discord/Models/Message.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Domain.Discord.Models
@@ -24,7 +24,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
     // https://discord.com/developers/docs/resources/channel#message-object
     public partial class Message : IHasId
     {
-        public string Id { get; }
+        public Snowflake Id { get; }
 
         public MessageType Type { get; }
 
@@ -49,7 +49,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
         public IReadOnlyList<User> MentionedUsers { get; }
 
         public Message(
-            string id,
+            Snowflake id,
             MessageType type,
             User author,
             DateTimeOffset timestamp,
@@ -83,7 +83,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
     {
         public static Message Parse(JsonElement json)
         {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
             var author = json.GetProperty("author").Pipe(User.Parse);
             var timestamp = json.GetProperty("timestamp").GetDateTimeOffset();
             var editedTimestamp = json.GetPropertyOrNull("edited_timestamp")?.GetDateTimeOffset();

DiscordChatExporter.Domain/Discord/Models/Reaction.cs

@@ -1,5 +1,5 @@
 using System.Text.Json;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 
 namespace DiscordChatExporter.Domain.Discord.Models
 {

DiscordChatExporter.Domain/Discord/Models/Role.cs

@@ -1,14 +1,16 @@
 using System.Drawing;
 using System.Text.Json;
+using DiscordChatExporter.Domain.Discord.Models.Common;
 using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Domain.Discord.Models
 {
     // https://discord.com/developers/docs/topics/permissions#role-object
-    public partial class Role
+    public partial class Role : IHasId
     {
-        public string Id { get; }
+        public Snowflake Id { get; }
 
         public string Name { get; }
 
@@ -16,7 +18,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
         public Color? Color { get; }
 
-        public Role(string id, string name, int position, Color? color)
+        public Role(Snowflake id, string name, int position, Color? color)
         {
             Id = id;
             Name = name;
@@ -31,7 +33,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
     {
         public static Role Parse(JsonElement json)
         {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
             var name = json.GetProperty("name").GetString();
             var position = json.GetProperty("position").GetInt32();
 

DiscordChatExporter.Domain/Discord/Models/User.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Text.Json;
 using DiscordChatExporter.Domain.Discord.Models.Common;
-using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 using JsonExtensions.Reading;
 
 namespace DiscordChatExporter.Domain.Discord.Models
@@ -9,7 +9,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
     // https://discord.com/developers/docs/resources/user#user-object
     public partial class User : IHasId
     {
-        public string Id { get; }
+        public Snowflake Id { get; }
 
         public bool IsBot { get; }
 
@@ -21,7 +21,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
         public string AvatarUrl { get; }
 
-        public User(string id, bool isBot, int discriminator, string name, string avatarUrl)
+        public User(Snowflake id, bool isBot, int discriminator, string name, string avatarUrl)
         {
             Id = id;
             IsBot = isBot;
@@ -38,7 +38,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
         private static string GetDefaultAvatarUrl(int discriminator) =>
             $"https://cdn.discordapp.com/embed/avatars/{discriminator % 5}.png";
 
-        private static string GetAvatarUrl(string id, string avatarHash)
+        private static string GetAvatarUrl(Snowflake id, string avatarHash)
         {
             // Animated
             if (avatarHash.StartsWith("a_", StringComparison.Ordinal))
@@ -50,7 +50,7 @@ namespace DiscordChatExporter.Domain.Discord.Models
 
         public static User Parse(JsonElement json)
         {
-            var id = json.GetProperty("id").GetString();
+            var id = json.GetProperty("id").GetString().Pipe(Snowflake.Parse);
             var discriminator = json.GetProperty("discriminator").GetString().Pipe(int.Parse);
             var name = json.GetProperty("username").GetString();
             var avatarHash = json.GetProperty("avatar").GetString();

DiscordChatExporter.Domain/Discord/Snowflake.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Globalization;
+using System.Text.RegularExpressions;
+
+namespace DiscordChatExporter.Domain.Discord
+{
+    public readonly partial struct Snowflake
+    {
+        public ulong Value { get; }
+
+        public Snowflake(ulong value) => Value = value;
+
+        public DateTimeOffset ToDate() =>
+            DateTimeOffset.FromUnixTimeMilliseconds((long) ((Value >> 22) + 1420070400000UL)).ToLocalTime();
+
+        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? TryParse(string? str, IFormatProvider? formatProvider = null)
+        {
+            if (string.IsNullOrWhiteSpace(str))
+                return null;
+
+            // As number
+            if (Regex.IsMatch(str, @"^\d{15,}$") &&
+                ulong.TryParse(str, NumberStyles.Number, formatProvider, out var value))
+            {
+                return new Snowflake(value);
+            }
+
+            // As date
+            if (DateTimeOffset.TryParse(str, formatProvider, DateTimeStyles.None, out var date))
+            {
+                return FromDate(date);
+            }
+
+            return null;
+        }
+
+        public static Snowflake Parse(string str, IFormatProvider? formatProvider) =>
+            TryParse(str, formatProvider) ?? throw new FormatException($"Invalid snowflake: {str}.");
+
+        public static Snowflake Parse(string str) => Parse(str, null);
+    }
+
+    public partial struct Snowflake : IEquatable<Snowflake>
+    {
+        public bool Equals(Snowflake other) => Value == other.Value;
+
+        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.Domain/Exporting/ExportContext.cs

@@ -5,6 +5,7 @@ using System.IO;
 using System.Linq;
 using System.Net.Http;
 using System.Threading.Tasks;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Internal.Extensions;
 using Tyrrrz.Extensions;
@@ -44,16 +45,13 @@ namespace DiscordChatExporter.Domain.Exporting
             var dateFormat => date.ToLocalString(dateFormat)
         };
 
-        public Member? TryGetMember(string id) =>
+        public Member? TryGetMember(Snowflake id) => Members.FirstOrDefault(m => m.Id == id);
-            Members.FirstOrDefault(m => m.Id == id);
 
-        public Channel? TryGetChannel(string id) =>
+        public Channel? TryGetChannel(Snowflake id) => Channels.FirstOrDefault(c => c.Id == id);
-            Channels.FirstOrDefault(c => c.Id == id);
 
-        public Role? TryGetRole(string id) =>
+        public Role? TryGetRole(Snowflake id) => Roles.FirstOrDefault(r => r.Id == id);
-            Roles.FirstOrDefault(r => r.Id == id);
 
-        public Color? TryGetUserColor(string id)
+        public Color? TryGetUserColor(Snowflake id)
         {
             var member = TryGetMember(id);
             var roles = member?.RoleIds.Join(Roles, i => i, r => r.Id, (_, role) => role);

DiscordChatExporter.Domain/Exporting/ExportRequest.cs

@@ -1,6 +1,6 @@
-using System;
+using System.IO;
-using System.IO;
 using System.Text;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Internal;
 
@@ -22,9 +22,9 @@ namespace DiscordChatExporter.Domain.Exporting
 
         public ExportFormat Format { get; }
 
-        public DateTimeOffset? After { get; }
+        public Snowflake? After { get; }
 
-        public DateTimeOffset? Before { get; }
+        public Snowflake? Before { get; }
 
         public int? PartitionLimit { get; }
 
@@ -39,8 +39,8 @@ namespace DiscordChatExporter.Domain.Exporting
             Channel channel,
             string outputPath,
             ExportFormat format,
-            DateTimeOffset? after,
+            Snowflake? after,
-            DateTimeOffset? before,
+            Snowflake? before,
             int? partitionLimit,
             bool shouldDownloadMedia,
             bool shouldReuseMedia,
@@ -78,8 +78,8 @@ namespace DiscordChatExporter.Domain.Exporting
             Channel channel,
             string outputPath,
             ExportFormat format,
-            DateTimeOffset? after = null,
+            Snowflake? after = null,
-            DateTimeOffset? before = null)
+            Snowflake? before = null)
         {
             // Output is a directory
             if (Directory.Exists(outputPath) || string.IsNullOrWhiteSpace(Path.GetExtension(outputPath)))
@@ -96,8 +96,8 @@ namespace DiscordChatExporter.Domain.Exporting
             Guild guild,
             Channel channel,
             ExportFormat format,
-            DateTimeOffset? after = null,
+            Snowflake? after = null,
-            DateTimeOffset? before = null)
+            Snowflake? before = null)
         {
             var buffer = new StringBuilder();
 
@@ -112,17 +112,17 @@ namespace DiscordChatExporter.Domain.Exporting
                 // Both 'after' and 'before' are set
                 if (after != null && before != null)
                 {
-                    buffer.Append($"{after:yyyy-MM-dd} to {before:yyyy-MM-dd}");
+                    buffer.Append($"{after?.ToDate():yyyy-MM-dd} to {before?.ToDate():yyyy-MM-dd}");
                 }
                 // Only 'after' is set
                 else if (after != null)
                 {
-                    buffer.Append($"after {after:yyyy-MM-dd}");
+                    buffer.Append($"after {after?.ToDate():yyyy-MM-dd}");
                 }
                 // Only 'before' is set
                 else
                 {
-                    buffer.Append($"before {before:yyyy-MM-dd}");
+                    buffer.Append($"before {before?.ToDate():yyyy-MM-dd}");
                 }
 
                 buffer.Append(")");

DiscordChatExporter.Domain/Exporting/MediaDownloader.cs

@@ -9,6 +9,7 @@ using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using DiscordChatExporter.Domain.Internal;
 using DiscordChatExporter.Domain.Internal.Extensions;
+using DiscordChatExporter.Domain.Utilities;
 
 namespace DiscordChatExporter.Domain.Exporting
 {

DiscordChatExporter.Domain/Exporting/Writers/CsvMessageWriter.cs

@@ -59,7 +59,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
         public override async ValueTask WriteMessageAsync(Message message)
         {
             // Author ID
-            await _writer.WriteAsync(CsvEncode(message.Author.Id));
+            await _writer.WriteAsync(CsvEncode(message.Author.Id.ToString()));
             await _writer.WriteAsync(',');
 
             // Author name

DiscordChatExporter.Domain/Exporting/Writers/Html/MessageGroup.cs

@@ -25,7 +25,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.Html
     internal partial class MessageGroup
     {
         public static bool CanJoin(Message message1, Message message2) =>
-            string.Equals(message1.Author.Id, message2.Author.Id, StringComparison.Ordinal) &&
+            message1.Author.Id == message2.Author.Id &&
             string.Equals(message1.Author.FullName, message2.Author.FullName, StringComparison.Ordinal) &&
             (message2.Timestamp - message1.Timestamp).Duration().TotalMinutes <= 7;
 

DiscordChatExporter.Domain/Exporting/Writers/Html/PreambleTemplate.cshtml

@@ -83,15 +83,15 @@
             <div class="preamble__entry preamble__entry--small">
             @if (Model.ExportContext.Request.After != null && Model.ExportContext.Request.Before != null)
             {
-                @($"Between {FormatDate(Model.ExportContext.Request.After.Value)} and {FormatDate(Model.ExportContext.Request.Before.Value)}")
+                @($"Between {FormatDate(Model.ExportContext.Request.After.Value.ToDate())} and {FormatDate(Model.ExportContext.Request.Before.Value.ToDate())}")
             }
             else if (Model.ExportContext.Request.After != null)
             {
-                @($"After {FormatDate(Model.ExportContext.Request.After.Value)}")
+                @($"After {FormatDate(Model.ExportContext.Request.After.Value.ToDate())}")
             }
             else if (Model.ExportContext.Request.Before != null)
             {
-                @($"Before {FormatDate(Model.ExportContext.Request.Before.Value)}")
+                @($"Before {FormatDate(Model.ExportContext.Request.Before.Value.ToDate())}")
             }
             </div>
         }

DiscordChatExporter.Domain/Exporting/Writers/JsonMessageWriter.cs

@@ -32,7 +32,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
         {
             _writer.WriteStartObject();
 
-            _writer.WriteString("id", attachment.Id);
+            _writer.WriteString("id", attachment.Id.ToString());
             _writer.WriteString("url", await Context.ResolveMediaUrlAsync(attachment.Url));
             _writer.WriteString("fileName", attachment.FileName);
             _writer.WriteNumber("fileSizeBytes", attachment.FileSize.TotalBytes);
@@ -166,7 +166,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
         {
             _writer.WriteStartObject();
 
-            _writer.WriteString("id", mentionedUser.Id);
+            _writer.WriteString("id", mentionedUser.Id.ToString());
             _writer.WriteString("name", mentionedUser.Name);
             _writer.WriteNumber("discriminator", mentionedUser.Discriminator);
             _writer.WriteString("nickname", Context.TryGetMember(mentionedUser.Id)?.Nick ?? mentionedUser.Name);
@@ -183,14 +183,14 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
 
             // Guild
             _writer.WriteStartObject("guild");
-            _writer.WriteString("id", Context.Request.Guild.Id);
+            _writer.WriteString("id", Context.Request.Guild.Id.ToString());
             _writer.WriteString("name", Context.Request.Guild.Name);
             _writer.WriteString("iconUrl", await Context.ResolveMediaUrlAsync(Context.Request.Guild.IconUrl));
             _writer.WriteEndObject();
 
             // Channel
             _writer.WriteStartObject("channel");
-            _writer.WriteString("id", Context.Request.Channel.Id);
+            _writer.WriteString("id", Context.Request.Channel.Id.ToString());
             _writer.WriteString("type", Context.Request.Channel.Type.ToString());
             _writer.WriteString("category", Context.Request.Channel.Category);
             _writer.WriteString("name", Context.Request.Channel.Name);
@@ -199,8 +199,8 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
 
             // Date range
             _writer.WriteStartObject("dateRange");
-            _writer.WriteString("after", Context.Request.After);
+            _writer.WriteString("after", Context.Request.After?.ToDate());
-            _writer.WriteString("before", Context.Request.Before);
+            _writer.WriteString("before", Context.Request.Before?.ToDate());
             _writer.WriteEndObject();
 
             // Message array (start)
@@ -213,7 +213,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
             _writer.WriteStartObject();
 
             // Metadata
-            _writer.WriteString("id", message.Id);
+            _writer.WriteString("id", message.Id.ToString());
             _writer.WriteString("type", message.Type.ToString());
             _writer.WriteString("timestamp", message.Timestamp);
             _writer.WriteString("timestampEdited", message.EditedTimestamp);
@@ -225,7 +225,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
 
             // Author
             _writer.WriteStartObject("author");
-            _writer.WriteString("id", message.Author.Id);
+            _writer.WriteString("id", message.Author.Id.ToString());
             _writer.WriteString("name", message.Author.Name);
             _writer.WriteString("discriminator", $"{message.Author.Discriminator:0000}");
             _writer.WriteBoolean("isBot", message.Author.IsBot);

DiscordChatExporter.Domain/Exporting/Writers/MarkdownVisitors/HtmlMarkdownVisitor.cs

@@ -3,6 +3,7 @@ using System.Linq;
 using System.Net;
 using System.Text;
 using System.Text.RegularExpressions;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Markdown;
 using DiscordChatExporter.Domain.Markdown.Ast;
@@ -84,7 +85,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
             }
             else if (mention.Type == MentionType.User)
             {
-                var member = _context.TryGetMember(mention.Id);
+                var member = _context.TryGetMember(Snowflake.Parse(mention.Id));
                 var fullName = member?.User.FullName ?? "Unknown";
                 var nick = member?.Nick ?? "Unknown";
 
@@ -95,7 +96,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
             }
             else if (mention.Type == MentionType.Channel)
             {
-                var channel = _context.TryGetChannel(mention.Id);
+                var channel = _context.TryGetChannel(Snowflake.Parse(mention.Id));
                 var name = channel?.Name ?? "deleted-channel";
 
                 _buffer
@@ -105,7 +106,7 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
             }
             else if (mention.Type == MentionType.Role)
             {
-                var role = _context.TryGetRole(mention.Id);
+                var role = _context.TryGetRole(Snowflake.Parse(mention.Id));
                 var name = role?.Name ?? "deleted-role";
                 var color = role?.Color;
 

DiscordChatExporter.Domain/Exporting/Writers/MarkdownVisitors/PlainTextMarkdownVisitor.cs

@@ -1,4 +1,5 @@
 using System.Text;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Markdown;
 using DiscordChatExporter.Domain.Markdown.Ast;
 
@@ -29,21 +30,21 @@ namespace DiscordChatExporter.Domain.Exporting.Writers.MarkdownVisitors
             }
             else if (mention.Type == MentionType.User)
             {
-                var member = _context.TryGetMember(mention.Id);
+                var member = _context.TryGetMember(Snowflake.Parse(mention.Id));
                 var name = member?.User.Name ?? "Unknown";
 
                 _buffer.Append($"@{name}");
             }
             else if (mention.Type == MentionType.Channel)
             {
-                var channel = _context.TryGetChannel(mention.Id);
+                var channel = _context.TryGetChannel(Snowflake.Parse(mention.Id));
                 var name = channel?.Name ?? "deleted-channel";
 
                 _buffer.Append($"#{name}");
             }
             else if (mention.Type == MentionType.Role)
             {
-                var role = _context.TryGetRole(mention.Id);
+                var role = _context.TryGetRole(Snowflake.Parse(mention.Id));
                 var name = role?.Name ?? "deleted-role";
 
                 _buffer.Append($"@{name}");

DiscordChatExporter.Domain/Exporting/Writers/PlainTextMessageWriter.cs

@@ -119,10 +119,10 @@ namespace DiscordChatExporter.Domain.Exporting.Writers
                 await _writer.WriteLineAsync($"Topic: {Context.Request.Channel.Topic}");
 
             if (Context.Request.After != null)
-                await _writer.WriteLineAsync($"After: {Context.FormatDate(Context.Request.After.Value)}");
+                await _writer.WriteLineAsync($"After: {Context.FormatDate(Context.Request.After.Value.ToDate())}");
 
             if (Context.Request.Before != null)
-                await _writer.WriteLineAsync($"Before: {Context.FormatDate(Context.Request.Before.Value)}");
+                await _writer.WriteLineAsync($"Before: {Context.FormatDate(Context.Request.Before.Value.ToDate())}");
 
             await _writer.WriteLineAsync('='.Repeat(62));
             await _writer.WriteLineAsync();

DiscordChatExporter.Domain/Internal/Extensions/DateExtensions.cs

@@ -5,12 +5,6 @@ namespace DiscordChatExporter.Domain.Internal.Extensions
 {
     internal static class DateExtensions
     {
-        public static string ToSnowflake(this DateTimeOffset dateTime)
-        {
-            var value = ((ulong) dateTime.ToUnixTimeMilliseconds() - 1420070400000UL) << 22;
-            return value.ToString();
-        }
-
         public static string ToLocalString(this DateTimeOffset dateTime, string format) =>
             dateTime.ToLocalTime().ToString(format, CultureInfo.InvariantCulture);
     }

DiscordChatExporter.Domain/Internal/Extensions/GenericExtensions.cs

@@ -4,8 +4,6 @@ namespace DiscordChatExporter.Domain.Internal.Extensions
 {
     internal static class GenericExtensions
     {
-        public static TOut Pipe<TIn, TOut>(this TIn input, Func<TIn, TOut> transform) => transform(input);
-
         public static T? NullIf<T>(this T value, Func<T, bool> predicate) where T : struct =>
             !predicate(value)
                 ? value

DiscordChatExporter.Domain/Utilities/GeneralExtensions.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace DiscordChatExporter.Domain.Utilities
+{
+    public static class GeneralExtensions
+    {
+        public static TOut Pipe<TIn, TOut>(this TIn input, Func<TIn, TOut> transform) => transform(input);
+    }
+}

DiscordChatExporter.Gui/ViewModels/Dialogs/ExportSetupViewModel.cs

@@ -1,8 +1,10 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using DiscordChatExporter.Domain.Discord;
 using DiscordChatExporter.Domain.Discord.Models;
 using DiscordChatExporter.Domain.Exporting;
+using DiscordChatExporter.Domain.Utilities;
 using DiscordChatExporter.Gui.Services;
 using DiscordChatExporter.Gui.ViewModels.Framework;
 
@@ -82,8 +84,8 @@ namespace DiscordChatExporter.Gui.ViewModels.Dialogs
                     Guild!,
                     channel,
                     SelectedFormat,
-                    After,
+                    After?.Pipe(Snowflake.FromDate),
-                    Before
+                    Before?.Pipe(Snowflake.FromDate)
                 );
 
                 // Filter

DiscordChatExporter.Gui/ViewModels/RootViewModel.cs

@@ -211,8 +211,8 @@ namespace DiscordChatExporter.Gui.ViewModels
                         channel!,
                         dialog.OutputPath!,
                         dialog.SelectedFormat,
-                        dialog.After,
+                        dialog.After?.Pipe(Snowflake.FromDate),
-                        dialog.Before,
+                        dialog.Before?.Pipe(Snowflake.FromDate),
                         dialog.PartitionLimit,
                         dialog.ShouldDownloadMedia,
                         _settingsService.ShouldReuseMedia,