Webhook Discord

server/lib/discord.js

@@ -0,0 +1,102 @@
+const SALES_WEBHOOK_URL = (process.env.DISCORD_WEBHOOK_SALES_URL || '').trim();
+const DOWNLOADS_WEBHOOK_URL = (process.env.DISCORD_WEBHOOK_DOWNLOADS_URL || '').trim();
+
+const PURCHASE_EVENT_TYPES = new Set([
+  'INITIAL_PURCHASE',
+  'RENEWAL',
+  'NON_RENEWING_PURCHASE',
+  'PRODUCT_CHANGE',
+]);
+
+const PLAN_NAMES_BY_PRODUCT = {
+  monthly_pro: 'Pro (monatlich)',
+  yearly_pro: 'Pro (jährlich)',
+  topup_small: 'Top-up Small (30 Credits)',
+  topup_medium: 'Top-up Medium (100 Credits)',
+  topup_large: 'Top-up Large (250 Credits)',
+};
+
+const EMBED_COLOR_SALE = 0x2ecc71;
+const EMBED_COLOR_NEW_USER = 0x3498db;
+
+const isPurchaseEventType = (eventType) =>
+  PURCHASE_EVENT_TYPES.has(String(eventType || '').toUpperCase());
+
+// Header/payload values end up in Discord embeds; strip markdown-relevant
+// characters and cap length so user-controlled input cannot break or spoof
+// the embed (Discord rejects fields over 1024 chars).
+const sanitizeEmbedText = (value, maxLength = 64) =>
+  String(value ?? '').replace(/[\r\n`]/g, ' ').trim().slice(0, maxLength);
+
+const formatStore = (store) => {
+  const normalized = String(store || '').toUpperCase();
+  if (normalized === 'APP_STORE' || normalized === 'MAC_APP_STORE') return 'iOS';
+  if (normalized === 'PLAY_STORE') return 'Android';
+  return normalized || 'Unbekannt';
+};
+
+const formatPlatform = (platform) => {
+  const normalized = String(platform || '').toLowerCase();
+  if (normalized === 'ios') return 'iOS';
+  if (normalized === 'android') return 'Android';
+  return 'Unbekannt';
+};
+
+const formatPrice = (price, currency) => {
+  if (typeof price !== 'number' || !Number.isFinite(price)) return '–';
+  return `${price.toFixed(2)} ${String(currency || 'USD').toUpperCase()}`;
+};
+
+const sendDiscordEmbed = (webhookUrl, embed) => {
+  if (!webhookUrl) return;
+  fetch(webhookUrl, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ embeds: [embed] }),
+    signal: AbortSignal.timeout(5000),
+  })
+    // Drain the body so undici can release the connection back to the pool.
+    .then((response) => response.arrayBuffer())
+    .catch(() => {});
+};
+
+const notifyPurchase = ({ productId, price, currency, store, isTrial, isRenewal, isSandbox } = {}) => {
+  const safeProductId = sanitizeEmbedText(productId);
+  const planName = Object.hasOwn(PLAN_NAMES_BY_PRODUCT, safeProductId)
+    ? PLAN_NAMES_BY_PRODUCT[safeProductId]
+    : safeProductId || 'Unbekannt';
+  const title = isTrial
+    ? '🛍️ Trial gestartet'
+    : isRenewal
+      ? '🔁 Abo verlängert'
+      : '🛍️ Neuer Kauf';
+  sendDiscordEmbed(SALES_WEBHOOK_URL, {
+    title: isSandbox ? `${title} (Sandbox)` : title,
+    color: EMBED_COLOR_SALE,
+    fields: [
+      { name: 'Produkt', value: `${planName} (\`${safeProductId || '–'}\`)`, inline: true },
+      { name: 'Preis', value: isTrial ? 'Trial' : formatPrice(price, currency), inline: true },
+      { name: 'Gerät', value: formatStore(store), inline: true },
+    ],
+    timestamp: new Date().toISOString(),
+  });
+};
+
+const notifyNewUser = ({ platform, appVersion, provider } = {}) => {
+  sendDiscordEmbed(DOWNLOADS_WEBHOOK_URL, {
+    title: '📲 Neuer User',
+    color: EMBED_COLOR_NEW_USER,
+    fields: [
+      { name: 'Gerät', value: formatPlatform(platform), inline: true },
+      { name: 'App-Version', value: sanitizeEmbedText(appVersion) || 'Unbekannt', inline: true },
+      { name: 'Anmeldung', value: String(provider || 'Unbekannt'), inline: true },
+    ],
+    timestamp: new Date().toISOString(),
+  });
+};
+
+module.exports = {
+  isPurchaseEventType,
+  notifyPurchase,
+  notifyNewUser,
+};