Telegram-Panel/src/TelegramPanel.Web/Components/Dialogs/BotChannelEditDialog.razor

@namespace TelegramPanel.Web.Components.Dialogs
@inject BotManagementService BotManagement
@inject TelegramPanel.Core.Services.Telegram.BotTelegramService BotTelegram
@inject ISnackbar Snackbar
@using TelegramPanel.Data.Entities
@using Microsoft.AspNetCore.Components.Forms

<MudDialog>
    <DialogContent>
        @if (loading)
        {
            <MudProgressLinear Indeterminate="true" />
        }
        else
        {
            <MudStack Spacing="2">
                <MudTextField @bind-Value="title" Label="频道标题" Variant="Variant.Outlined" Required="true" />
                <MudTextField @bind-Value="about" Label="频道简介（可选）" Variant="Variant.Outlined" Lines="4" />

                <MudSwitch @bind-Value="editAvatar" Label="修改频道头像" Color="Color.Primary" />
                @if (editAvatar)
                {
                    <MudFileUpload T="IReadOnlyList<IBrowserFile>" FilesChanged="OnAvatarChanged" Accept="image/*" MaximumFileCount="1">
                        <ActivatorContent>
                            <MudButton Variant="Variant.Outlined" Color="Color.Primary" StartIcon="@Icons.Material.Filled.Image">
                                选择头像图片
                            </MudButton>
                        </ActivatorContent>
                    </MudFileUpload>

                    @if (avatarFile != null)
                    {
                        <MudText Typo="Typo.body2">已选择：@avatarFile.Name（@avatarFile.Size bytes）</MudText>
                    }
                }
            </MudStack>
        }
    </DialogContent>
    <DialogActions>
        <MudButton Variant="Variant.Text" Color="Color.Default" OnClick="Cancel" Disabled="@saving">取消</MudButton>
        <MudButton Variant="Variant.Filled" Color="Color.Primary" OnClick="Save" Disabled="@saving">
            @if (saving)
            {
                <MudProgressCircular Size="Size.Small" Indeterminate="true" Class="mr-2" />
                <span>保存中...</span>
            }
            else
            {
                <span>保存</span>
            }
        </MudButton>
    </DialogActions>
</MudDialog>

@code
{
    [CascadingParameter] private MudDialogInstance MudDialog { get; set; } = default!;
    [Parameter] public int BotId { get; set; }
    [Parameter] public long ChannelTelegramId { get; set; }

    private bool loading = true;
    private bool saving;

    private string title = "";
    private string about = "";
    private TelegramPanel.Core.Services.Telegram.BotTelegramService.BotChatInfo? chatInfo;
    private bool editAvatar;
    private IBrowserFile? avatarFile;

    protected override async Task OnInitializedAsync()
    {
        await Load();
    }

    private async Task Load()
    {
        loading = true;
        try
        {
            chatInfo = await BotTelegram.GetChatInfoAsync(BotId, ChannelTelegramId, CancellationToken.None);
            title = chatInfo.Title ?? "";
            about = chatInfo.Description ?? "";
        }
        catch (Exception ex)
        {
            Snackbar.Add($"加载失败：{ex.Message}", Severity.Error);
        }
        finally
        {
            loading = false;
        }
    }

    private async Task Save()
    {
        if (saving)
            return;

        title = (title ?? string.Empty).Trim();
        if (string.IsNullOrWhiteSpace(title))
        {
            Snackbar.Add("频道标题不能为空", Severity.Warning);
            return;
        }

        saving = true;
        try
        {
            var normalizedAbout = string.IsNullOrWhiteSpace(about) ? null : about.Trim();
            await BotTelegram.UpdateChannelInfoAsync(BotId, ChannelTelegramId, title, normalizedAbout, CancellationToken.None);

            if (editAvatar)
            {
                if (avatarFile == null)
                    throw new InvalidOperationException("请先选择头像图片");

                const long maxBytes = 20 * 1024 * 1024;
                await using var stream = avatarFile.OpenReadStream(maxBytes);
                await BotTelegram.SetChannelPhotoAsync(BotId, ChannelTelegramId, stream, avatarFile.Name, CancellationToken.None);
            }

            // 同步回本地 DB（用于列表展示）
            var dbChannel = await BotManagement.GetChannelByTelegramIdAsync(BotId, ChannelTelegramId);
            var username = chatInfo?.Username ?? dbChannel?.Username;
            var memberCount = chatInfo?.MemberCount ?? dbChannel?.MemberCount ?? 0;

            await BotManagement.UpsertChannelAsync(BotId, new BotChannel
            {
                TelegramId = ChannelTelegramId,
                Title = title,
                Username = username,
                IsBroadcast = true,
                MemberCount = memberCount,
                About = normalizedAbout,
                AccessHash = dbChannel?.AccessHash,
                CreatedAt = dbChannel?.CreatedAt
            });

            Snackbar.Add("保存成功", Severity.Success);
            MudDialog.Close(DialogResult.Ok(true));
        }
        catch (Exception ex)
        {
            Snackbar.Add($"保存失败：{ex.Message}", Severity.Error);
        }
        finally
        {
            saving = false;
        }
    }

    private void Cancel()
    {
        MudDialog.Cancel();
    }

    private void OnAvatarChanged(IReadOnlyList<IBrowserFile> files)
    {
        avatarFile = files?.FirstOrDefault();
    }
}