name: Send Slack alert on PR merge test failure
description: Send a Slack alert when automated tests failed on trunk after PR merge.
permissions: {}

inputs:
    slack-bot-token:
        required: true
    channel-id:
        required: true
    test-type:
        required: true
        type: choice
        options:
            - E2E
            - API
            - k6

runs:
    using: composite
    steps:
        - name: Compose Slack message
          id: compose-slack-message
          uses: actions/github-script@v6
          env:
              PR_NUMBER: ${{ github.event.pull_request.number }}
              PR_TITLE: ${{ github.event.pull_request.title }}
              SHA: ${{ github.event.pull_request.merge_commit_sha }}
              TEST_TYPE: ${{ inputs.test-type }}
          with:
              script: |
                  const script = require('./.github/actions/tests/slack-alert-on-pr-merge/scripts/compose-slack-message.js')
                  const slackMessage = script()
                  core.setOutput('slack-message', slackMessage)

        - name: Send Slack alert
          uses: slackapi/slack-github-action@v1.23.0
          env:
              SLACK_BOT_TOKEN: ${{ inputs.slack-bot-token }}
          with:
              channel-id: ${{ inputs.channel-id }}
              payload: ${{ steps.compose-slack-message.outputs.slack-message }}