add alternatives field checks for the new entries

.github/workflows/data-test-and-validate.yml

@@ -25,4 +25,4 @@ jobs:
         env:
           CI_CHECKS_TOKEN: ${{ github.token }}
       - name: Lint data
-        run: bun oxfmt react-native-libraries.json
+        run: bun oxfmt react-native-libraries.json --check

react-native-libraries.json

@@ -19284,7 +19284,7 @@
     "android": true,
     "newArchitecture": true
   },
-   {
+  {
     "githubUrl": "https://github.com/Gautham495/react-native-nitro-ios-alarm-kit",
     "examples": [
       "https://github.com/Gautham495/react-native-nitro-ios-alarm-kit/tree/main/example"

scripts/validate-new-entries.ts

@@ -1,6 +1,7 @@
 import { fetch } from 'bun';
 import { differenceWith, isEqual } from 'es-toolkit';
 
+import { type LibraryType } from '~/types';
 import { VALID_ENTRY_KEYS } from '~/util/Constants';
 
 import libraries from '../react-native-libraries.json';
@@ -105,6 +106,43 @@ for (let i = 0; i < modifiedEntries.length; i += BATCH_SIZE) {
           return false;
         }
 
+        if (entryWithGitHubData?.alternatives && entryWithGitHubData.alternatives.length > 0) {
+          const alternativesDataResponse = await fetch(
+            `https://reactnative.directory/api/library?name=${entryWithGitHubData.alternatives.join(',')}`
+          );
+
+          if (alternativesDataResponse.status !== 200) {
+            console.error('Cannot check the alternative library existence in the directory.');
+            return false;
+          }
+
+          const alternativesDataJson = (await alternativesDataResponse.json()) as Record<
+            string,
+            LibraryType
+          >;
+
+          const alternativesChecks = entryWithGitHubData.alternatives.map(alternative => {
+            if (alternative in alternativesDataJson) {
+              if (!alternativesDataJson[alternative].unmaintained) {
+                console.error(
+                  `${alternative} is not marked as unmaintained in the directory, so it cannot be defined as an alternative for the package.`
+                );
+                return false;
+              }
+            } else {
+              console.error(
+                `${alternative} is not listed in the directory, so it cannot be defined as an alternative for the package.`
+              );
+              return false;
+            }
+            return true;
+          });
+
+          if (alternativesChecks.includes(false)) {
+            return false;
+          }
+        }
+
         return true;
       })()
     )