name: Cloudflare Purge
description: Purge Cloudflare Cache
inputs:
  urls:
    description: urls
    required: true
  cloudflare_zone_id:
    description: CloudFlare zone id
    required: true
  cloudflare_cache_token:
    description: CloudFlare cache token
    required: true
runs:
  using: "composite"
  steps:
    - name: Purge
      shell: bash
      run: |
        MAX=50000
        urls="${{ inputs.urls }}"
        echo "Size=${#urls}"
        if [ ${#urls} -ge $MAX ]; then
          echo "Too many URLs. Splitting URLS in batches..."  
          indices=`echo $urls | grep -o -b " "`
          offset=0
          length=0
          for idx in $indices
          do
            end=${idx%:*}
            new_length=$((end - offset))
            if [ $new_length -ge $MAX ]; then
              echo "Batch from offset ${offset} of length ${length}"
        
              subarray=${urls:$offset:$length}
              batch=`jq --compact-output --null-input '$ARGS.positional' --args -- $subarray`
              json="{\"files\": ${batch}}"
        
              curl -v -X POST 'https://api.cloudflare.com/client/v4/zones/${{ inputs.cloudflare_zone_id }}/purge_cache' \
              -H 'Content-Type:application/json' -H 'Authorization: Bearer ${{ inputs.cloudflare_cache_token }}' \
              --data "${json}"
        
              offset=$((offset + length))
              length=$((end - offset))
            else
              length=$new_length
            fi
          done
          if [ $length -gt 0 ]; then
            length=$((${#urls} - offset + 1))
            echo "Last Batch from offset ${offset} of length ${length}"
        
            subarray=${urls:$offset:$length}
            batch=`jq --compact-output --null-input '$ARGS.positional' --args -- $subarray`
            json="{\"files\": ${batch}}"
        
            curl -v -X POST 'https://api.cloudflare.com/client/v4/zones/${{ inputs.cloudflare_zone_id }}/purge_cache' \
            -H 'Content-Type:application/json' -H 'Authorization: Bearer ${{ inputs.cloudflare_cache_token }}' \
            --data "${json}"
          fi
        else
          echo "Executing single Purge command..."  
          batch=`jq --compact-output --null-input '$ARGS.positional' --args -- $subarray`
          json="{\"files\": ${batch}}"
        
          curl -v -X POST 'https://api.cloudflare.com/client/v4/zones/${{ inputs.cloudflare_zone_id }}/purge_cache' \
          -H 'Content-Type:application/json' -H 'Authorization: Bearer ${{ inputs.cloudflare_cache_token }}' \
          --data "${json}"
        fi