Fix formatting

Co-authored-by: Oleksii Holub <1935960+Tyrrrz@users.noreply.github.com>

Directory.Packages.props

@@ -14,7 +14,7 @@
     <PackageVersion Include="CommunityToolkit.Mvvm" Version="8.4.2" />
     <PackageVersion Include="coverlet.collector" Version="10.0.1" />
     <PackageVersion Include="CSharpier.MsBuild" Version="1.2.6" />
-    <PackageVersion Include="Deorcify" Version="1.1.0" />
+    <PackageVersion Include="Deorcify" Version="2.0.1" />
     <PackageVersion Include="DialogHost.Avalonia" Version="0.12.2" />
     <PackageVersion Include="FluentAssertions" Version="8.10.0" />
     <PackageVersion Include="GitHubActionsTestLogger" Version="3.0.4" />
@@ -33,7 +33,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
     <PackageVersion Include="Onova" Version="2.6.13" />
     <PackageVersion Include="Polly" Version="8.6.6" />
-    <PackageVersion Include="PowerKit" Version="1.2.0" />
+    <PackageVersion Include="PowerKit" Version="2.0.1" />
     <PackageVersion Include="RazorBlade" Version="1.0.0" />
     <PackageVersion Include="Spectre.Console" Version="0.55.2" />
     <PackageVersion Include="Superpower" Version="3.1.0" />

DiscordChatExporter.Cli.Tests/DiscordChatExporter.Cli.Tests.csproj

@@ -14,13 +14,13 @@
     <PackageReference Include="coverlet.collector" PrivateAssets="all" />
     <PackageReference Include="CSharpier.MsBuild" PrivateAssets="all" />
     <PackageReference Include="FluentAssertions" />
-    <PackageReference Include="GitHubActionsTestLogger" PrivateAssets="all" />
+    <PackageReference Include="GitHubActionsTestLogger" />
     <PackageReference Include="JsonExtensions" />
     <PackageReference Include="Microsoft.Extensions.Configuration" />
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" />
     <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
-    <PackageReference Include="PowerKit" PrivateAssets="all" />
+    <PackageReference Include="PowerKit" />
     <PackageReference Include="xunit" />
     <PackageReference Include="xunit.runner.visualstudio" PrivateAssets="all" />
   </ItemGroup>

DiscordChatExporter.Cli/Commands/Base/ExportCommandBase.cs

@@ -165,6 +165,37 @@ public abstract class ExportCommandBase : DiscordCommandBase
             throw new CommandException("Option --media-dir cannot be used without --media.");
         }
 
+        // Make sure the user does not try to export multiple channels into one file.
+        // Output path must either be a directory or contain template tokens for this to work.
+        // Validate this up-front, before fetching threads, because thread fetching can take a
+        // long time and it's frustrating to fail only after it completes.
+        // https://github.com/Tyrrrz/DiscordChatExporter/issues/799
+        // https://github.com/Tyrrrz/DiscordChatExporter/issues/917
+        // https://github.com/Tyrrrz/DiscordChatExporter/issues/1549
+        var mayExportMultipleChannels =
+            // Multiple channels were provided explicitly
+            channels.Count > 1
+            // Thread inclusion can add more channels to the export
+            || ThreadInclusionMode != ThreadInclusionMode.None;
+
+        var isValidOutputPath =
+            // Anything is valid when exporting a single channel
+            !mayExportMultipleChannels
+            // When using template tokens, assume the user knows what they're doing
+            || OutputPath.Contains('%')
+            // Otherwise, require an existing directory or an unambiguous directory path
+            || Directory.Exists(OutputPath)
+            || Path.EndsInDirectorySeparator(OutputPath);
+
+        if (!isValidOutputPath)
+        {
+            throw new CommandException(
+                "Attempted to export multiple channels, but the output path is neither a directory nor a template. "
+                    + "If the provided output path is meant to be treated as a directory, make sure it ends with a slash. "
+                    + $"Provided output path: '{OutputPath}'."
+            );
+        }
+
         var unwrappedChannels = new List<Channel>(channels);
 
         // Unwrap threads
@@ -205,28 +236,6 @@ public abstract class ExportCommandBase : DiscordCommandBase
             await console.Output.WriteLineAsync($"Fetched {fetchedThreadsCount} thread(s).");
         }
 
-        // Make sure the user does not try to export multiple channels into one file.
-        // Output path must either be a directory or contain template tokens for this to work.
-        // https://github.com/Tyrrrz/DiscordChatExporter/issues/799
-        // https://github.com/Tyrrrz/DiscordChatExporter/issues/917
-        var isValidOutputPath =
-            // Anything is valid when exporting a single channel
-            unwrappedChannels.Count <= 1
-            // When using template tokens, assume the user knows what they're doing
-            || OutputPath.Contains('%')
-            // Otherwise, require an existing directory or an unambiguous directory path
-            || Directory.Exists(OutputPath)
-            || Path.EndsInDirectorySeparator(OutputPath);
-
-        if (!isValidOutputPath)
-        {
-            throw new CommandException(
-                "Attempted to export multiple channels, but the output path is neither a directory nor a template. "
-                    + "If the provided output path is meant to be treated as a directory, make sure it ends with a slash. "
-                    + $"Provided output path: '{OutputPath}'."
-            );
-        }
-
         // Export
         var errorsByChannel = new ConcurrentDictionary<Channel, string>();
         var warningsByChannel = new ConcurrentDictionary<Channel, string>();

DiscordChatExporter.Cli/DiscordChatExporter.Cli.csproj

@@ -9,9 +9,9 @@
   <ItemGroup>
     <PackageReference Include="CliFx" />
     <PackageReference Include="CSharpier.MsBuild" PrivateAssets="all" />
-    <PackageReference Include="Deorcify" PrivateAssets="all" />
+    <PackageReference Include="Deorcify" />
     <PackageReference Include="Gress" />
-    <PackageReference Include="PowerKit" PrivateAssets="all" />
+    <PackageReference Include="PowerKit" />
     <PackageReference Include="Spectre.Console" />
   </ItemGroup>
 

DiscordChatExporter.Core/DiscordChatExporter.Core.csproj

@@ -6,7 +6,7 @@
     <PackageReference Include="Gress" />
     <PackageReference Include="JsonExtensions" />
     <PackageReference Include="Polly" />
-    <PackageReference Include="PowerKit" PrivateAssets="all" />
+    <PackageReference Include="PowerKit" />
     <PackageReference Include="RazorBlade" />
     <PackageReference Include="Superpower" />
     <PackageReference Include="WebMarkupMin.Core" />

DiscordChatExporter.Core/Exporting/ExportAssetDownloader.cs

@@ -38,23 +38,28 @@ internal partial class ExportAssetDownloader(string workingDirPath, bool reuse)
             return _previousPathsByUrl[url] = filePath;
 
         // Check for a file cached by the legacy naming scheme (5-char hash) and rename it
-        // to the new naming scheme to preserve backwards compatibility with existing exports
+        // to the new naming scheme to preserve backwards compatibility with existing exports.
+        // This will catch both the 5-char lowercase hash and the 5-char uppercase hash variants.
         if (reuse)
         {
-            var legacyFilePath = Path.Combine(workingDirPath, GetLegacyFileNameFromUrl(url));
-            if (File.Exists(legacyFilePath))
+            var legacyFileNames = GetLegacyFileNamesFromUrl(url);
+            foreach (var legacyFileName in legacyFileNames)
             {
-                // Overwrite in case the destination file was created concurrently between our
-                // earlier existence check and this move operation
-                try
+                var legacyFilePath = Path.Combine(workingDirPath, legacyFileName);
+                if (File.Exists(legacyFilePath))
                 {
-                    File.Move(legacyFilePath, filePath, overwrite: true);
-                    return _previousPathsByUrl[url] = filePath;
-                }
-                catch (IOException)
-                {
-                    // The legacy file was moved or deleted concurrently or something else happened.
-                    // Upgrading old files is not crucial, so we can just move on.
+                    // Overwrite in case the destination file was created concurrently between our
+                    // earlier existence check and this move operation
+                    try
+                    {
+                        File.Move(legacyFilePath, filePath, true);
+                        return _previousPathsByUrl[url] = filePath;
+                    }
+                    catch (IOException)
+                    {
+                        // The legacy file was moved or deleted concurrently or something else happened.
+                        // Upgrading old files is not crucial, so we can just move on.
+                    }
                 }
             }
         }
@@ -87,10 +92,16 @@ internal partial class ExportAssetDownloader
 {
     private static string NormalizeUrl(string url)
     {
-        // Remove signature parameters from Discord CDN URLs to normalize them
+        // Remove signature parameters from Discord CDN/media URLs to normalize them
         var uri = new Uri(url);
-        if (!string.Equals(uri.Host, "cdn.discordapp.com", StringComparison.OrdinalIgnoreCase))
+
+        if (
+            !string.Equals(uri.Host, "cdn.discordapp.com", StringComparison.OrdinalIgnoreCase)
+            && !string.Equals(uri.Host, "media.discordapp.net", StringComparison.OrdinalIgnoreCase)
+        )
+        {
             return url;
+        }
 
         var query = HttpUtility.ParseQueryString(uri.Query);
         query.Remove("ex");
@@ -137,13 +148,16 @@ internal partial class ExportAssetDownloader
         );
 
     // Legacy naming used a 5-char hash, kept for backwards compatibility with existing exports
-    private static string GetLegacyFileNameFromUrl(string url) =>
-        GetFileNameFromUrl(
-            url,
-            SHA256
-                .HashData(Encoding.UTF8.GetBytes(NormalizeUrl(url)))
-                .Pipe(Convert.ToHexStringLower)
-                // 5 chars = 20 bits, reaches 1% collision probability at ~145 files
-                .Truncate(5)
-        );
+    private static IReadOnlyList<string> GetLegacyFileNamesFromUrl(string url)
+    {
+        var hashData = SHA256.HashData(Encoding.UTF8.GetBytes(NormalizeUrl(url)));
+
+        return
+        [
+            // Lowercase variant (introduced in 2.46.1)
+            GetFileNameFromUrl(url, Convert.ToHexStringLower(hashData).Truncate(5)),
+            // Uppercase variant (original)
+            GetFileNameFromUrl(url, Convert.ToHexString(hashData).Truncate(5)),
+        ];
+    }
 }

DiscordChatExporter.Core/Exporting/ExportRequest.cs

@@ -206,10 +206,15 @@ public partial class ExportRequest
     {
         var actualOutputPath = FormatPath(outputPath, guild, channel, after, before);
 
-        // Output is a directory
+        // Determine whether the output path refers to a directory or a file.
+        // The extension-based heuristic is evaluated on the original, unsubstituted path,
+        // because the value of a template token (e.g. a guild or channel name) may contain
+        // a period that would otherwise be mistaken for a file extension, incorrectly causing
+        // a directory path to be treated as a file.
+        // https://github.com/Tyrrrz/DiscordChatExporter/issues/1502
         if (
             Directory.Exists(actualOutputPath)
-            || string.IsNullOrWhiteSpace(Path.GetExtension(actualOutputPath))
+            || string.IsNullOrWhiteSpace(Path.GetExtension(outputPath))
         )
         {
             var fileName = GetDefaultOutputFileName(guild, channel, format, after, before);

DiscordChatExporter.Gui/DiscordChatExporter.Gui.csproj

@@ -31,7 +31,7 @@
     <PackageReference Include="Cogwheel" />
     <PackageReference Include="CommunityToolkit.Mvvm" />
     <PackageReference Include="CSharpier.MsBuild" PrivateAssets="all" />
-    <PackageReference Include="Deorcify" PrivateAssets="all" />
+    <PackageReference Include="Deorcify" />
     <PackageReference Include="DialogHost.Avalonia" />
     <PackageReference Include="Gress" />
     <PackageReference Include="Markdig" />
@@ -39,7 +39,7 @@
     <PackageReference Include="Material.Icons.Avalonia" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" />
     <PackageReference Include="Onova" />
-    <PackageReference Include="PowerKit" PrivateAssets="all" />
+    <PackageReference Include="PowerKit" />
     <PackageReference Include="ThisAssembly.Project" PrivateAssets="all" />
   </ItemGroup>