name: 'Map labels to version'
description: 'Map labels assigned to a PR to a specific semvar version for package updates'
inputs:
  pull-number:
    description: 'Pull request number'
    required: true

outputs:
  version:
    description: Semvar version
    value: ${{ steps.set-version-output.outputs.version }}

runs:
  using: 'composite'
  steps:
    - uses: actions/checkout@v3

    - name: Fetch PR labels
      uses: ./.github/actions/fetch-pr-labels
      id: fetch-pr-labels
      with:
        pull-number: ${{ inputs.pull-number }}

    - name: Map labels to version
      uses: actions/github-script@v4
      id: parse-labels-for-version
      with:
        script: |
          const isOfType = (lbls, v) => lbls.filter(l => l.toLowerCase() === v).length > 0
          const labels = ${{ steps.fetch-pr-labels.outputs.labels }}
          if (labels.length > 0) {
            if (isOfType(labels, "version:major")) return 'major'
            if (isOfType(labels, "version:minor")) return 'minor'
            if (isOfType(labels, "version:patch")) return 'patch'
          }
          return 'none'

    - name: Set output path to uploaded file
      id: set-version-output
      run: echo "::set-output name=version::$VERSION"
      shell: bash
      env:
        VERSION: ${{ steps.parse-labels-for-version.outputs.result }}