Merge pull request #49 from takejohn/45-follow_announcements-error

/follow_announcementsのエラー (#45)

commands/receiveupdate.js

@@ -1,4 +1,5 @@
-const { SlashCommandBuilder, ChannelType, PermissionsBitField, CommandInteraction } = require('discord.js');
+const assert = require('assert');
+const { SlashCommandBuilder, ChannelType, PermissionsBitField, CommandInteraction, Client, NewsChannel } = require('discord.js');
 const config = require('../config.json')
 const { LANG } = require('../util/languages');
 
@@ -13,20 +14,24 @@ module.exports = {
 			.addChannelTypes(ChannelType.GuildText)
 			.setRequired(true)
 		),
-    execute: async function (/** @type {CommandInteraction} */ interaction, client) {
+    execute: async function (
+		/** @type {CommandInteraction} */ interaction,
+		/** @type {Client} */ client) {
 		await interaction.deferReply()
 		if (!interaction.member.permissions.has(PermissionsBitField.Flags.Administrator)) {
 			return await interaction.editReply('権限がありません!(管理者権限が必要です。)')
 		}
 		const targetchannel = interaction.options.getChannel('channel');
-		client.channels.resolve("1211695901760819281").addFollower(targetchannel.id) //TODO: config.jsonで編集可能に?
-			.then(() =>
-				console.log(`[Sekai.Explode] new follower! ${interaction.guild.name} - ${interaction.guild.id}`),
-				interaction.editReply(`<#${targetchannel.id}>にSekai.Explodeのアナウンスを通知します :wave:`)
-			)
-			.catch((e) =>
-				console.log(`Something Went wrong. ${e}`),
-				interaction.editReply(`失敗しました！エラー: ${e}`)
-			)
+
+		const channel = client.channels.resolve("1211695901760819281"); //TODO: config.jsonで編集可能に?
+		assert(channel instanceof NewsChannel);
+		try {
+			await channel.addFollower(targetchannel.id);
+			console.log(`[Sekai.Explode] new follower! ${interaction.guild.name} - ${interaction.guild.id}`),
+			await interaction.editReply(`<#${targetchannel.id}>にSekai.Explodeのアナウンスを通知します :wave:`)
+		} catch (e) {
+			console.log(`Something Went wrong. ${e}`),
+			await interaction.editReply(`失敗しました！エラー: ${e}`)
+		}
     }
 };