Enhance bot functionality with AutoMod, Logging, Welcome, and Verification features

- Implemented AutoMod capabilities including spam filtering, anti-raid, and anti-nuke actions.
- Added Logging module to track moderation actions and events across the bot.
- Introduced Welcome module for customizable welcome messages and autoroles.
- Developed Verification system with captcha and role assignment features.
- Updated Prisma schema to include new models for AutoMod, Logging, Welcome, and Verification.
- Enhanced command localization for new features in both German and English.
- Improved health server to handle captcha verification requests.
- Added new environment variable for public base URL to support captcha links.

apps/bot/src/modules/welcome/service.ts

@@ -0,0 +1,56 @@
+import type { PrismaClient } from '@prisma/client';
+import type { WelcomeEmbed, WelcomeMessageType } from '@nexumi/shared';
+import { applyWelcomePlaceholders } from '@nexumi/shared';
+import type { Guild, GuildMember } from 'discord.js';
+import { ensureGuild } from '../../guild.js';
+
+export async function getWelcomeConfig(prisma: PrismaClient, guildId: string) {
+  await ensureGuild(prisma, guildId);
+  let config = await prisma.welcomeConfig.findUnique({ where: { guildId } });
+  if (!config) {
+    config = await prisma.welcomeConfig.create({ data: { guildId } });
+  }
+  return config;
+}
+
+export function buildPlaceholderVars(member: GuildMember, guild: Guild) {
+  return {
+    user: `<@${member.id}>`,
+    'user.name': member.displayName,
+    'user.tag': member.user.tag,
+    'user.id': member.id,
+    server: guild.name,
+    memberCount: guild.memberCount
+  };
+}
+
+export function renderWelcomeText(template: string, member: GuildMember, guild: Guild): string {
+  return applyWelcomePlaceholders(template, buildPlaceholderVars(member, guild));
+}
+
+export function parseWelcomeEmbed(raw: unknown): WelcomeEmbed | null {
+  if (!raw || typeof raw !== 'object') {
+    return null;
+  }
+  return raw as WelcomeEmbed;
+}
+
+export type WelcomePayload = {
+  type: WelcomeMessageType;
+  content?: string | null;
+  embed?: WelcomeEmbed | null;
+  imageTitle?: string | null;
+  imageSubtitle?: string | null;
+};
+
+export function resolveWelcomePayload(
+  config: Awaited<ReturnType<typeof getWelcomeConfig>>
+): WelcomePayload {
+  return {
+    type: config.welcomeType as WelcomeMessageType,
+    content: config.welcomeContent,
+    embed: parseWelcomeEmbed(config.welcomeEmbed),
+    imageTitle: config.imageTitle,
+    imageSubtitle: config.imageSubtitle
+  };
+}