76 lines
3.5 KiB
C#
76 lines
3.5 KiB
C#
using System.Net.Http.Json;
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namespace Charac.Client;
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internal sealed record ResourceTarget(Guid Id, string Name, string Account);
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internal sealed record ResourceSession(Guid Id, Guid TargetId, string TargetName, string Account,
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DateTimeOffset CreatedAt, string State);
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internal sealed record ResourceList(ResourceTarget[] Targets, ResourceSession[] Sessions);
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internal sealed record ResourceSelection(Guid? TargetId = null, Guid? SessionId = null, bool Refresh = false);
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internal static class ResourceMenu
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{
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public static async Task<ResourceSelection?> SelectAsync(HttpClient http, Uri origin,
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TextReader input, TextWriter output, CancellationToken cancellationToken = default)
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{
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while (true)
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{
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var resources = await http.GetFromJsonAsync(new Uri(origin, "/resources"),
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ClientJsonContext.Default.ResourceList, cancellationToken);
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if (resources?.Targets is null || resources.Sessions is null)
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throw new InvalidOperationException("Server returned an invalid resource list.");
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var selection = ReadSelection(resources, input, output);
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if (selection is not { Refresh: true })
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return selection;
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}
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}
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internal static ResourceSelection? ReadSelection(ResourceList resources, TextReader input, TextWriter output)
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{
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var choices = new List<ResourceSelection>();
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output.WriteLine();
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output.WriteLine("已有会话");
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if (resources.Sessions.Length == 0)
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output.WriteLine(" 暂无运行中的会话。");
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foreach (var session in resources.Sessions)
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{
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var caption = $"{Label(session.TargetName)} / {Label(session.Account)} · {session.CreatedAt.ToLocalTime():g}";
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if (session.State == "detached")
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{
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choices.Add(new(SessionId: session.Id));
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output.WriteLine($" [{choices.Count}] 返回 {caption}");
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}
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else
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output.WriteLine($" [占用] {caption} · 已有客户端控制，暂不可选");
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output.WriteLine($" {session.Id}");
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}
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output.WriteLine();
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output.WriteLine("新建会话");
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if (resources.Targets.Length == 0)
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output.WriteLine(" 暂无已授权的目标，请管理员登记目标访问权限。");
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foreach (var target in resources.Targets)
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{
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choices.Add(new(TargetId: target.Id));
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output.WriteLine($" [{choices.Count}] 新建 {Label(target.Name)} / {Label(target.Account)}");
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output.WriteLine($" {target.Id}");
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}
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output.WriteLine(" 目标列表表示访问授权；实际连接时检查 SSH 是否可达。");
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output.WriteLine();
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while (true)
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{
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output.Write("输入编号连接，r 刷新，q 退出：");
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var value = input.ReadLine()?.Trim();
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if (value is null || string.Equals(value, "q", StringComparison.OrdinalIgnoreCase))
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return null;
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if (string.Equals(value, "r", StringComparison.OrdinalIgnoreCase))
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return new(Refresh: true);
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if (int.TryParse(value, out var number) && number >= 1 && number <= choices.Count)
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return choices[number - 1];
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output.WriteLine("请选择列表中的编号，或输入 r / q。");
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}
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}
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private static string Label(string value) => new(value.Where(character =>
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!char.IsControl(character) && character is not ('\u2028' or '\u2029')).Take(160).ToArray());
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}
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