Chore: Close outdated support / general discussions (#5443)

.github/workflows/repo-maintenance.yml

@@ -107,3 +107,94 @@ jobs:
 
               await sleep(1000)
             }
+  close-outdated-discussions:
+    name: 'Close Outdated Discussions'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            function sleep(ms) {
+              return new Promise(resolve => setTimeout(resolve, ms));
+            }
+
+            const CUTOFF_DAYS = 180;
+            const cutoff = new Date();
+            cutoff.setDate(cutoff.getDate() - CUTOFF_DAYS);
+
+            const query = `query(
+                $owner:String!,
+                $name:String!,
+                $supportCategory:ID!,
+                $generalCategory:ID!,
+              ) {
+              supportDiscussions: repository(owner:$owner, name:$name){
+                discussions(
+                  categoryId:$supportCategory,
+                  last:50,
+                  answered:false,
+                  states:[OPEN],
+                ) {
+                  nodes {
+                    id,
+                    number,
+                    updatedAt
+                  }
+                },
+              },
+              generalDiscussions: repository(owner:$owner, name:$name){
+                discussions(
+                  categoryId:$generalCategory,
+                  last:50,
+                  states:[OPEN],
+                ) {
+                  nodes {
+                    id,
+                    number,
+                    updatedAt
+                  }
+                }
+              }
+            }`;
+            const variables = {
+              owner: context.repo.owner,
+              name: context.repo.repo,
+              supportCategory: "DIC_kwDOG1Zs184CBKWK",
+              generalCategory: "DIC_kwDOG1Zs184CBKWJ"
+            }
+            const result = await github.graphql(query, variables);
+            const combinedDiscussions = [
+              ...result.supportDiscussions.discussions.nodes,
+              ...result.generalDiscussions.discussions.nodes,
+            ]
+
+            console.log(`Checking ${combinedDiscussions.length} open discussions`);
+
+            for (const discussion of combinedDiscussions) {
+              if (new Date(discussion.updatedAt) < cutoff) {
+                console.log(`Closing outdated discussion #${discussion.number} (${discussion.id}), last updated at ${discussion.updatedAt}`);
+                const addCommentMutation = `mutation($discussion:ID!, $body:String!) {
+                  addDiscussionComment(input:{discussionId:$discussion, body:$body}) {
+                    clientMutationId
+                  }
+                }`;
+                const commentVariables = {
+                  discussion: discussion.id,
+                  body: 'This discussion has been automatically closed due to inactivity.',
+                }
+                await github.graphql(addCommentMutation, commentVariables);
+
+                const closeDiscussionMutation = `mutation($discussion:ID!, $reason:DiscussionCloseReason!) {
+                  closeDiscussion(input:{discussionId:$discussion, reason:$reason}) {
+                    clientMutationId
+                  }
+                }`;
+                const closeVariables = {
+                  discussion: discussion.id,
+                  reason: "OUTDATED",
+                }
+                await github.graphql(closeDiscussionMutation, closeVariables);
+
+                await sleep(1000);
+              }
+            }