From b33a6cdfe0ac94b0f4df22dece8968478811bc1e Mon Sep 17 00:00:00 2001
From: "P. Reis" <patrickpereirareal1@gmail.com>
Date: Mon, 30 Sep 2024 13:53:30 -0300
Subject: [PATCH] feat: add TREND_LANGUAGES environment variable

---
 src/config.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/config.ts b/src/config.ts
index 21fbbe01..0051d3d4 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -1,4 +1,5 @@
 import os from 'node:os';
+import ISO6391, { LanguageCode } from 'iso-639-1';
 import * as dotenv from '@std/dotenv';
 import { getPublicKey, nip19 } from 'nostr-tools';
 import { z } from 'zod';
@@ -247,6 +248,10 @@ class Conf {
   static get zapSplitsEnabled(): boolean {
     return optionalBooleanSchema.parse(Deno.env.get('ZAP_SPLITS_ENABLED')) ?? false;
   }
+  /** Filter trends by languages. */
+  static get trendLanguages(): LanguageCode[] | undefined {
+    return Deno.env.get('TREND_LANGUAGES')?.split(',')?.filter(ISO6391.validate) as LanguageCode[];
+  }
   /** Cache settings. */
   static caches = {
     /** NIP-05 cache settings. */