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path: root/MatrixUtils.RoomUpgradeCLI/Commands/NewFromRoomDirCommand.cs
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using ArcaneLibs.Extensions;
using LibMatrix.EventTypes.Spec.State.RoomInfo;
using LibMatrix.Helpers;
using LibMatrix.Homeservers;
using MatrixUtils.RoomUpgradeCLI.Extensions;

namespace MatrixUtils.RoomUpgradeCLI.Commands;

public class NewFromRoomDirCommand(ILogger<NewFromRoomDirCommand> logger, IHost host, RuntimeContext ctx, AuthenticatedHomeserverGeneric hs) : IHostedService {
    public async Task StartAsync(CancellationToken cancellationToken) {
        if (ctx.Args.Length <= 1) {
            await PrintHelp();
            return;
        }

        var dirName = ctx.Args[1];
        if (dirName.StartsWith("--")) {
            Console.WriteLine("Directory name cannot start with --, please provide a valid directory name.");
            await PrintHelp();
        }

        if (Directory.Exists(dirName))
            Directory.Delete(dirName, true);
        Directory.CreateDirectory(dirName);
        List<Task> tasks = [];
        await foreach (var rooms in hs.EnumeratePublicRoomsAsync().WithCancellation(cancellationToken)) {
            // foreach (var room in rooms.Chunk) { }
            tasks.AddRange(rooms.Chunk.Select(x=> ProcessRoom(dirName, x)));
        }
        await Task.WhenAll(tasks);

        // var rb = ctx.Args.Contains("--upgrade") ? new RoomUpgradeBuilder() : new RoomBuilder();
        //
        // // check for room membership!
        // if (rb is RoomUpgradeBuilder rub) {

        // }
        await host.StopAsync(cancellationToken);
    }

    private async Task ProcessRoom(string dirName, PublicRoomDirectoryResult.PublicRoomListItem roomListItem) {
        Console.WriteLine(roomListItem.Name ?? roomListItem.RoomId);
        var room = hs.GetRoom(roomListItem.RoomId);
        var rb = new RoomUpgradeBuilder() {
            OldRoomId = roomListItem.RoomId
        };

        await rb.ApplyRoomUpgradeCLIArgs(hs, ctx.Args[2..], isNewState: true);
        try {
            var membership = await room.GetStateAsync<RoomMemberEventContent>(RoomMemberEventContent.EventId, hs.UserId);
        }
        catch (Exception e) {
            Console.WriteLine("Error checking room membership: " + e.Message);
            Console.WriteLine("Please ensure you are a member of the room you are trying to upgrade. -- ABORTING --");
            await host.StopAsync();
            return;
        }

        await rb.ImportAsync(hs.GetRoom(roomListItem.RoomId));

        var validFileNameChars = (roomListItem.Name ?? roomListItem.CanonicalAlias ?? roomListItem.RoomId)
            // .Replace('&', '_')
            // .Replace(':', '_')
            // .Replace('\'', '_')
            // .Replace(' ', '_')
            .ToList();
        validFileNameChars.RemoveAll(Path.GetInvalidFileNameChars().Contains);
        var filename = string.Join("", validFileNameChars);
        while (File.Exists(filename))
            filename += "_";

        await File.WriteAllTextAsync(dirName + "/" + filename + ".json", rb.ToJson());
    }

    public async Task StopAsync(CancellationToken cancellationToken) { }

    private async Task PrintHelp() {
        Console.WriteLine("Usage: new [filename] [options]");
        Console.WriteLine("Options:");
        Console.WriteLine("  --help                                             Show this help message");
        Console.WriteLine("  --version <version>                                Set the room version (e.g. 9, 10, 11, 12)");
        Console.WriteLine("-- New room options --");
        Console.WriteLine("  --alias <alias>                                    Set the room alias (local part)");
        Console.WriteLine("  --avatar-url <url>                                 Set the room avatar URL");
        Console.WriteLine("  --copy-avatar <roomId>                             Copy the avatar from an existing room");
        Console.WriteLine("  --copy-powerlevels <roomId>                        Copy power levels from an existing room");
        Console.WriteLine("  --invite-admin <userId>                            Invite a user as an admin (userId must start with '@')");
        Console.WriteLine("  --invite <userId>                                  Invite a user (userId must start with '@')");
        Console.WriteLine("  --name <name>                                      Set the room name (can be multiple words)");
        Console.WriteLine("  --topic <topic>                                    Set the room topic (can be multiple words)");
        Console.WriteLine("  --federate <true|false>                            Set whether the room is federatable");
        Console.WriteLine("  --public                                           Set the room join rule to public");
        Console.WriteLine("  --invite-only                                      Set the room join rule to invite-only");
        Console.WriteLine("  --knock                                            Set the room join rule to knock");
        Console.WriteLine("  --restricted                                       Set the room join rule to restricted");
        Console.WriteLine("  --knock_restricted                                 Set the room join rule to knock_restricted");
        Console.WriteLine("  --private                                          Set the room join rule to private");
        Console.WriteLine("  --join-rule <rule>                                 Set the room join rule (public, invite, knock, restricted, knock_restricted, private)");
        Console.WriteLine("  --history-visibility <visibility>                  Set the room history visibility (shared, invited, joined, world_readable)");
        Console.WriteLine("  --type <type>                                      Set the room type (e.g. m.space, m.room, support.feline.policy.list.msc.v1 etc.)");
        // upgrade opts
        Console.WriteLine("-- Upgrade options --");
        Console.WriteLine(
            "  --upgrade <roomId>                                 Create a room upgrade file instead of a new room file - WARNING: incompatible with non-upgrade options");
        Console.WriteLine("  --invite-members                                   Invite members during room upgrade");
        Console.WriteLine("  --invite-powerlevel-users                          Invite users with power levels during room upgrade");
        Console.WriteLine("  --migrate-bans                                     Migrate bans during room upgrade");
        Console.WriteLine("  --migrate-empty-state-events                       Migrate empty state events during room upgrade");
        Console.WriteLine("  --upgrade-unstable-values                          Upgrade unstable values during room upgrade");
        Console.WriteLine("  --msc4321-policy-list-upgrade <move|transition>    Upgrade MSC4321 policy list");
        Console.WriteLine(
            "WARNING: The --upgrade option is incompatible with options listed under \"New room\", please use the equivalent options in the `modify` command instead.");
        await host.StopAsync();
    }
}