Add: Welcome and goodbye message module

- Add /welcome command with setchannel, add, remove, list, help
- Welcome messages on guildMemberAdd event
- Goodbye messages on guildMemberRemove event
- Auto-use Discord system channel if no custom channel set
- Variables: {user}, {username}, {server}, {membercount}
- Add welcome_message and goodbye_message to guild_settings

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/commands/utility/welcome.ts

@@ -0,0 +1,158 @@
+import { SlashCommandBuilder, PermissionFlagsBits, EmbedBuilder, MessageFlags } from 'discord.js';
+import { Command } from '../../structures/Command.js';
+
+const command: Command = {
+    data: new SlashCommandBuilder()
+        .setName('welcome')
+        .setDescription('Willkommens- und Abschiedsnachrichten verwalten.')
+        .addSubcommand(subcommand =>
+            subcommand
+                .setName('setchannel')
+                .setDescription('Kanal für Willkommen/Abschied setzen (Mod).')
+                .addChannelOption(option =>
+                    option.setName('channel')
+                        .setDescription('Discord-Kanal')
+                        .setRequired(true)))
+        .addSubcommand(subcommand =>
+            subcommand
+                .setName('add')
+                .setDescription('Nachricht setzen (Mod).')
+                .addStringOption(option =>
+                    option.setName('type')
+                        .setDescription('Art der Nachricht')
+                        .setRequired(true)
+                        .addChoices(
+                            { name: 'Willkommen', value: 'welcome' },
+                            { name: 'Abschied', value: 'goodbye' }
+                        ))
+                .addStringOption(option =>
+                    option.setName('message')
+                        .setDescription('Die Nachricht. Variablen: {user}, {username}, {server}, {membercount}')
+                        .setRequired(true)))
+        .addSubcommand(subcommand =>
+            subcommand
+                .setName('remove')
+                .setDescription('Nachricht entfernen (Mod).')
+                .addStringOption(option =>
+                    option.setName('type')
+                        .setDescription('Art der Nachricht')
+                        .setRequired(true)
+                        .addChoices(
+                            { name: 'Willkommen', value: 'welcome' },
+                            { name: 'Abschied', value: 'goodbye' }
+                        )))
+        .addSubcommand(subcommand =>
+            subcommand
+                .setName('list')
+                .setDescription('Aktuelle Einstellungen anzeigen.'))
+        .addSubcommand(subcommand =>
+            subcommand
+                .setName('help')
+                .setDescription('Hilfe zu Welcome-Befehlen.')),
+    category: 'Admin',
+    async execute(interaction: any) {
+        const subcommand = interaction.options.getSubcommand();
+        const guildId = interaction.guildId;
+        const isAdmin = interaction.memberPermissions?.has(PermissionFlagsBits.ModerateMembers);
+        const DB = interaction.client.DB;
+
+        // Ensure guild settings exist
+        DB.run('INSERT OR IGNORE INTO guild_settings (guild_id) VALUES (?)', guildId);
+
+        if (subcommand === 'help') {
+            const embed = new EmbedBuilder()
+                .setTitle('👋 Welcome Hilfe')
+                .setColor(0x2ecc71)
+                .setDescription('Begrüße neue Mitglieder oder verabschiede dich von ihnen.')
+                .addFields(
+                    { name: '`/welcome setchannel <#kanal>`', value: 'Setzt den Kanal für Willkommen/Abschied (Mod).\nStandard: Discord System-Channel.', inline: false },
+                    { name: '`/welcome add welcome <nachricht>`', value: 'Setzt die Willkommensnachricht (Mod).', inline: false },
+                    { name: '`/welcome add goodbye <nachricht>`', value: 'Setzt die Abschiedsnachricht (Mod).', inline: false },
+                    { name: '`/welcome remove welcome|goodbye`', value: 'Entfernt eine Nachricht (Mod).', inline: false },
+                    { name: '`/welcome list`', value: 'Zeigt aktuelle Einstellungen.', inline: false },
+                    { name: 'Variablen', value: '`{user}` - Nutzer erwähnen\n`{username}` - Nutzername\n`{server}` - Servername\n`{membercount}` - Mitgliederanzahl', inline: false },
+                    { name: 'Beispiel', value: '`/welcome add welcome Willkommen {user} auf {server}! Du bist der {membercount}. Nutzer.`', inline: false }
+                )
+                .setTimestamp();
+
+            await interaction.reply({ embeds: [embed], flags: [MessageFlags.Ephemeral] });
+            return;
+        }
+
+        if (subcommand === 'list') {
+            const settings: any = DB.get('SELECT * FROM guild_settings WHERE guild_id = ?', guildId);
+
+            const channel = settings?.welcome_channel
+                ? `<#${settings.welcome_channel}>`
+                : 'Nicht gesetzt';
+
+            const welcomeMsg = settings?.welcome_message || 'Nicht gesetzt';
+            const goodbyeMsg = settings?.goodbye_message || 'Nicht gesetzt';
+
+            const embed = new EmbedBuilder()
+                .setTitle('👋 Welcome Einstellungen')
+                .setColor(0x2ecc71)
+                .setDescription(`Server: **${interaction.guild.name}**`)
+                .addFields(
+                    { name: 'Kanal', value: channel, inline: true },
+                    { name: '👋 Willkommen', value: welcomeMsg, inline: false },
+                    { name: '👋 Abschied', value: goodbyeMsg, inline: false }
+                )
+                .setTimestamp();
+
+            await interaction.reply({ embeds: [embed], flags: [MessageFlags.Ephemeral] });
+            return;
+        }
+
+        // Admin only for modify commands
+        if (!isAdmin) {
+            await interaction.reply({ content: '❌ Keine Berechtigung. Moderatoren erforderlich.', flags: [MessageFlags.Ephemeral] });
+            return;
+        }
+
+        if (subcommand === 'setchannel') {
+            const channel = interaction.options.getChannel('channel');
+
+            DB.run(
+                'UPDATE guild_settings SET welcome_channel = ? WHERE guild_id = ?',
+                channel.id,
+                guildId
+            );
+
+            await interaction.reply({ content: `✅ Kanal für Willkommen/Abschied auf ${channel} gesetzt.`, flags: [MessageFlags.Ephemeral] });
+            return;
+        }
+
+        if (subcommand === 'add') {
+            const type = interaction.options.getString('type') as 'welcome' | 'goodbye';
+            const message = interaction.options.getString('message')!;
+
+            const column = type === 'welcome' ? 'welcome_message' : 'goodbye_message';
+
+            DB.run(
+                `UPDATE guild_settings SET ${column} = ? WHERE guild_id = ?`,
+                message,
+                guildId
+            );
+
+            const label = type === 'welcome' ? 'Willkommensnachricht' : 'Abschiedsnachricht';
+            await interaction.reply({ content: `✅ ${label} gesetzt:\n\`\`\`\n${message}\n\`\`\``, flags: [MessageFlags.Ephemeral] });
+            return;
+        }
+
+        if (subcommand === 'remove') {
+            const type = interaction.options.getString('type') as 'welcome' | 'goodbye';
+            const column = type === 'welcome' ? 'welcome_message' : 'goodbye_message';
+
+            DB.run(
+                `UPDATE guild_settings SET ${column} = NULL WHERE guild_id = ?`,
+                guildId
+            );
+
+            const label = type === 'welcome' ? 'Willkommensnachricht' : 'Abschiedsnachricht';
+            await interaction.reply({ content: `✅ ${label} entfernt.`, flags: [MessageFlags.Ephemeral] });
+        }
+    },
+};
+
+export default command;

src/events/guildMemberAdd.ts

@@ -0,0 +1,34 @@
+import { Events, GuildMember, TextChannel, EmbedBuilder } from 'discord.js';
+
+export default {
+    name: Events.GuildMemberAdd,
+    async execute(member: GuildMember) {
+        const DB = (member.client as any).DB;
+        const guildId = member.guild.id;
+
+        const settings: any = DB.get('SELECT * FROM guild_settings WHERE guild_id = ?', guildId);
+
+        // Use custom channel or fall back to Discord's system channel
+        const channelId = settings?.welcome_channel || member.guild.systemChannelId;
+        if (!channelId || !settings?.welcome_message) {
+            return;
+        }
+
+        const channel = member.guild.channels.cache.get(channelId);
+        if (!channel || !channel.isTextBased()) {
+            return;
+        }
+
+        const message = settings.welcome_message
+            .replace(/{user}/g, `<@${member.id}>`)
+            .replace(/{username}/g, member.user.username)
+            .replace(/{server}/g, member.guild.name)
+            .replace(/{membercount}/g, member.guild.memberCount.toString());
+
+        try {
+            await (channel as TextChannel).send(message);
+        } catch (error) {
+            console.error('[WELCOME] Error sending welcome message:', error);
+        }
+    },
+};

src/events/guildMemberRemove.ts

@@ -0,0 +1,34 @@
+import { Events, GuildMember, TextChannel, EmbedBuilder } from 'discord.js';
+
+export default {
+    name: Events.GuildMemberRemove,
+    async execute(member: GuildMember) {
+        const DB = (member.client as any).DB;
+        const guildId = member.guild.id;
+
+        const settings: any = DB.get('SELECT * FROM guild_settings WHERE guild_id = ?', guildId);
+
+        // Use custom channel or fall back to Discord's system channel
+        const channelId = settings?.welcome_channel || member.guild.systemChannelId;
+        if (!channelId || !settings?.goodbye_message) {
+            return;
+        }
+
+        const channel = member.guild.channels.cache.get(channelId);
+        if (!channel || !channel.isTextBased()) {
+            return;
+        }
+
+        const message = settings.goodbye_message
+            .replace(/{user}/g, `<@${member.id}>`)
+            .replace(/{username}/g, member.user.username)
+            .replace(/{server}/g, member.guild.name)
+            .replace(/{membercount}/g, member.guild.memberCount.toString());
+
+        try {
+            await (channel as TextChannel).send(message);
+        } catch (error) {
+            console.error('[WELCOME] Error sending goodbye message:', error);
+        }
+    },
+};

src/structures/Database.ts

@@ -25,6 +25,8 @@ export class DB {
                 prefix TEXT DEFAULT '!',
                 mod_log_channel TEXT,
                 welcome_channel TEXT,
+                welcome_message TEXT,
+                goodbye_message TEXT,
                 warn_threshold INTEGER DEFAULT 3,
                 warn_action TEXT DEFAULT 'ban',
                 warn_mute_duration INTEGER DEFAULT 1800