更改Discord服务器RTC区域的正确姿势：从服务器到语音频道

import discord
from discord.ext import commands

# 假设bot已经初始化并登录

@commands.group(invoke_without_command=True)
async def region(ctx):
    """显示当前服务器所有语音频道的RTC区域设置"""
    if not ctx.guild:
        await ctx.send("此命令只能在服务器中使用。")
        return

    response = "当前服务器语音频道RTC区域：\n"
    found_voice_channels = False
    for channel in ctx.guild.voice_channels:
        response += f"- {channel.name}: {channel.rtc_region if channel.rtc_region else '自动'}\n"
        found_voice_channels = True

    if not found_voice_channels:
        response = "此服务器没有语音频道。"

    await ctx.send(response)

@region.command(name="set")
@commands.has_permissions(manage_channels=True) # 需要管理频道权限
async def set_region(ctx, region_name: str, *, channel: discord.VoiceChannel = None):
    """
    设置一个或所有语音频道的RTC区域。
    用法: !region set <区域名称> [频道名称]
    区域名称示例: 'us-central', 'europe', 'brazil'
    """
    if not ctx.guild:
        await ctx.send("此命令只能在服务器中使用。")
        return

    # 将区域名称转换为小写以进行更灵活的匹配
    region_name = region_name.lower()

    # 验证区域名称是否有效（可选，但推荐）
    # Discord API支持的区域列表可以在其文档中找到，这里只做简单示例
    valid_regions = ["us-central", "us-east", "us-south", "us-west", 
                     "europe", "singapore", "hongkong", "japan", "sydney", 
                     "brazil", "india", "southafrica", "russia"]
    if region_name not in valid_regions and region_name != "auto":
        await ctx.send(f"无效的RTC区域名称：`{region_name}`。请尝试 'auto' 或以下之一：{', '.join(valid_regions)}")
        return

    if channel:
        # 如果指定了频道，则只修改该频道
        try:
            await channel.edit(rtc_region=region_name if region_name != "auto" else None)
            await ctx.send(f"已将语音频道 **{channel.name}** 的RTC区域设置为 **{region_name}**。")
        except discord.Forbidden:
            await ctx.send(f"我没有权限修改频道 **{channel.name}** 的RTC区域。")
        except Exception as e:
            await ctx.send(f"修改频道 **{channel.name}** RTC区域时发生错误: {e}")
    else:
        # 如果未指定频道，则修改所有语音频道
        modified_channels = []
        failed_channels = []
        for vc in ctx.guild.voice_channels:
            try:
                await vc.edit(rtc_region=region_name if region_name != "auto" else None)
                modified_channels.append(vc.name)
            except discord.Forbidden:
                failed_channels.append(f"{vc.name} (权限不足)")
            except Exception as e:
                failed_channels.append(f"{vc.name} (错误: {e})")

        response = ""
        if modified_channels:
            response += f"已将以下语音频道的RTC区域设置为 **{region_name}**：{', '.join(modified_channels)}\n"
        if failed_channels:
            response += f"未能修改以下语音频道：{', '.join(failed_channels)}\n"
        if not modified_channels and not failed_channels:
            response = "此服务器没有语音频道可供修改。"

        await ctx.send(response if response else "没有语音频道被修改。")

# 假设bot实例名为'bot'
# bot.add_command(region)