Add GitHub Action to Automatically Check for Duplicate Issues

.github/workflows/check-duplicate-issues.yml

@@ -0,0 +1,60 @@
+name: Check for Duplicate Issues
+
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  check_duplicate:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v3
+
+    - name: Install jq
+      run: sudo apt-get update && sudo apt-get install -y jq
+
+    - name: Search for existing issues
+      id: search_issues
+      run: |
+        # URL encode the issue title (replace spaces with %20)
+        issue_title=$(echo "${{ github.event.issue.title }}" | sed 's/ /%20/g')
+
+        # Search for issues with a similar title
+        existing_issues=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+          "https://api.github.com/search/issues?q=repo:${{ github.repository }}+type:issue+state:open+${issue_title}")
+
+        # Extract issue numbers from the search result
+        echo "$existing_issues" | jq -r '.items[] | .number' > issue_numbers.txt
+
+    - name: Check if a duplicate exists
+      id: check_duplicate
+      run: |
+        issue_count=$(wc -l < issue_numbers.txt)
+
+        if [ "$issue_count" -gt 0 ]; then
+          echo "Duplicate issue(s) found."
+          exit 0
+        else
+          echo "No duplicates found."
+          exit 1
+        fi
+
+    - name: Comment and close the new issue if duplicate exists
+      if: steps.check_duplicate.outcome == 'success'
+      run: |
+        issue_numbers=$(cat issue_numbers.txt | tr '\n' ', ' | sed 's/, $//')
+        existing_issue=$(head -n 1 issue_numbers.txt)
+
+        # Comment on the new issue
+        curl -s -X POST -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+        -H "Content-Type: application/json" \
+        -d "{\"body\": \"Thanks for raising this issue! However, we believe a similar issue already exists. Kindly go through all the open issues and ask to be assigned to that issue.\"}" \
+        "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.issue.number }}/comments"
+
+        # Close the new issue
+        curl -s -X PATCH -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
+        -H "Content-Type: application/json" \
+        -d '{"state": "closed"}' \
+        "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.issue.number }}"