refactor: move cache seconds calculation logic into reusable function (#4532)

* refactor: move cache seconds calculation logic into reusable function

* dev

---------

Co-authored-by: Alexandr <qwerty541zxc@gmail.com>

api/pin.js

@@ -2,13 +2,9 @@
 
 import { renderRepoCard } from "../src/cards/repo.js";
 import { blacklist } from "../src/common/blacklist.js";
+import { resolveCacheSeconds } from "../src/common/cache.js";
 import { whitelist } from "../src/common/envs.js";
-import {
-  clampValue,
-  CONSTANTS,
-  parseBoolean,
-  renderError,
-} from "../src/common/utils.js";
+import { CONSTANTS, parseBoolean, renderError } from "../src/common/utils.js";
 import { fetchRepo } from "../src/fetchers/repo.js";
 import { isLocaleAvailable } from "../src/translations.js";
 
@@ -80,15 +76,12 @@ export default async (req, res) => {
 
   try {
     const repoData = await fetchRepo(username, repo);
-
-    let cacheSeconds = clampValue(
-      parseInt(cache_seconds || CONSTANTS.PIN_CARD_CACHE_SECONDS, 10),
-      CONSTANTS.ONE_DAY,
-      CONSTANTS.TEN_DAY,
-    );
-    cacheSeconds = process.env.CACHE_SECONDS
-      ? parseInt(process.env.CACHE_SECONDS, 10) || cacheSeconds
-      : cacheSeconds;
+    const cacheSeconds = resolveCacheSeconds({
+      requested: cache_seconds,
+      def: CONSTANTS.PIN_CARD_CACHE_SECONDS,
+      min: CONSTANTS.ONE_DAY,
+      max: CONSTANTS.TEN_DAY,
+    });
 
     res.setHeader(
       "Cache-Control",