Add cooldown mechanism for npm package publishing

.github/workflows/publish.yml

@@ -19,11 +19,43 @@ jobs:
       id-token: write
     steps:
       - uses: actions/checkout@v6
+
+      - name: Check publish cooldown
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          # Cooldown period in seconds (24 hours)
+          COOLDOWN_SECONDS=86400
+
+          # Fetch the last publish timestamp from repository variables
+          LAST_PUBLISH=$(gh api repos/${{ github.repository }}/actions/variables/LAST_NPM_PUBLISH_TIME --jq '.value' 2>/dev/null || echo "0")
+
+          if [ "$LAST_PUBLISH" != "0" ]; then
+            CURRENT_TIME=$(date +%s)
+            TIME_SINCE_LAST=$((CURRENT_TIME - LAST_PUBLISH))
+            TIME_REMAINING=$((COOLDOWN_SECONDS - TIME_SINCE_LAST))
+
+            if [ $TIME_SINCE_LAST -lt $COOLDOWN_SECONDS ]; then
+              HOURS_REMAINING=$((TIME_REMAINING / 3600))
+              MINUTES_REMAINING=$(( (TIME_REMAINING % 3600) / 60 ))
+
+              echo "❌ Cooldown period is still active!"
+              echo "⏱️  Time since last publish: $((TIME_SINCE_LAST / 3600))h $(( (TIME_SINCE_LAST % 3600) / 60 ))m"
+              echo "⏰ Time remaining: ${HOURS_REMAINING}h ${MINUTES_REMAINING}m"
+              echo ""
+              echo "Please wait before publishing again."
+              exit 1
+            fi
+          fi
+
+          echo "✅ Cooldown check passed. Proceeding with publish..."
+
       - uses: actions/setup-node@v6
         with:
           # cache: npm
           node-version-file: '.nvmrc'
           registry-url: 'https://registry.npmjs.org'
+
       - name: Show Node & npm versions
         run: |
           node -v
@@ -37,8 +69,32 @@ jobs:
 
       - name: Install dependencies
         run: npm ci
+
       - name: Build library
         run: npm run ci:build:lib
+
       - name: Publish to npm
         working-directory: ./dist/angularx-qrcode
         run: npm publish --access public
+
+      - name: Update publish cooldown timestamp
+        if: success()
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          CURRENT_TIME=$(date +%s)
+
+          # Check if variable exists
+          if gh api repos/${{ github.repository }}/actions/variables/LAST_NPM_PUBLISH_TIME 2>/dev/null; then
+            # Update existing variable
+            gh api --method PATCH repos/${{ github.repository }}/actions/variables/LAST_NPM_PUBLISH_TIME \
+              -f name='LAST_NPM_PUBLISH_TIME' \
+              -f value="$CURRENT_TIME"
+          else
+            # Create new variable
+            gh api --method POST repos/${{ github.repository }}/actions/variables \
+              -f name='LAST_NPM_PUBLISH_TIME' \
+              -f value="$CURRENT_TIME"
+          fi
+
+          echo "✅ Cooldown timestamp updated to $(date -d @$CURRENT_TIME '+%Y-%m-%d %H:%M:%S UTC')"