name: "Collect changes"
description: "Collects and stores changed files/charts"

inputs:
  token:
    required: true
    description: "The Github API token to use"
  working-directory:
    required: false
    description: "The working dir to use when checking for changes"
    default: "."

outputs:
  changesDetected:
    description: "Whether or not changes to files have been detected"
    value: ${{ steps.filter.outputs.addedOrModified }}
  chartChangesDetected:
    description: "Whether or not changes to charts have been detected"
    value: ${{ steps.filter.outputs.chartsAddedOrModified }}
  addedOrModifiedFiles:
    description: "A list of the files that changed"
    value: ${{ steps.filter.outputs.addedOrModified_files }}
  addedOrModifiedChartFiles:
    description: "A list of the chart files that changed"
    value: ${{ steps.filter.outputs.chartsAddedOrModified_files }}
  addedOrModifiedCharts:
    description: "A list of the charts changed"
    value: ${{ steps.changed-charts.outputs.addedOrModifiedCharts }}

runs:
  using: "composite"
  steps:
    - name: Collect changed files
      uses: dorny/paths-filter@v2
      id: filter
      with:
        token: ${{ inputs.token }}
        working-directory: ${{ inputs.working-directory }}
        list-files: shell
        filters: |
          addedOrModified:
            - added|modified: '**'
          chartsAddedOrModified:
            - added|modified: 'charts/*/**'

    - name: Collect changed charts
      id: changed-charts
      shell: bash
      run: |
        CHARTS=()
        PATHS=(${{ steps.filter.outputs.chartsAddedOrModified_files }})

        # Get only the chart paths
        for CHARTPATH in "${PATHS[@]}"
        do
          IFS='/' read -r -a path_parts <<< "${CHARTPATH}"
          CHARTS+=("${path_parts[1]}/${path_parts[2]}")
        done

        # Remove duplicates
        CHARTS=( `printf "%s\n" "${CHARTS[@]}" | sort -u` )

        # Set output to changed charts
        printf "::set-output name=addedOrModifiedCharts::%s\n" "${CHARTS[*]}"