name: Notify PDF sync

on:
  push:
    branches: [master]
    paths:
      - "test/pdfs/*.pdf"
      - "test/pdfs/*.pdf.link"
permissions:
  contents: read

jobs:
  notify:
    runs-on: ubuntu-latest
    environment: sync_pdfs

    steps:
      - name: Checkout repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 1
          persist-credentials: false

      - name: Check for added PDF files
        id: check
        run: |
          git fetch --no-tags --depth=1 origin ${{ github.event.before }}

          mapfile -t added < <(
            git diff --diff-filter=A --name-only \
              ${{ github.event.before }} \
              ${{ github.sha }} \
              -- \
              ':(glob)test/pdfs/*.pdf' \
              ':(glob)test/pdfs/*.pdf.link'
          )

          if [ "${#added[@]}" -gt 0 ]; then
            echo "has_added=true" >> "$GITHUB_OUTPUT"
            printf 'files_json=%s\n' "$(printf '%s\n' "${added[@]}" | jq -Rsc 'split("\n")[:-1]')" >> "$GITHUB_OUTPUT"
          else
            echo "has_added=false" >> "$GITHUB_OUTPUT"
            echo 'files_json=[]' >> "$GITHUB_OUTPUT"
          fi

      - name: Generate app token
        if: steps.check.outputs.has_added == 'true'
        id: app-token
        uses: actions/create-github-app-token@1b10c78c7865c340bc4f6099eb2f838309f1e8c3 # v3.1.1
        with:
          client-id: ${{ secrets.CLIENT_ID }}
          private-key: ${{ secrets.APP_PRIVATE_KEY }}
          owner: mozilla
          repositories: pdf.js.pdfs

      - name: Trigger sync
        if: steps.check.outputs.has_added == 'true'
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
          FILES_JSON: ${{ steps.check.outputs.files_json }}
        run: |
          payload=$(jq -nc \
            --arg before "${{ github.event.before }}" \
            --arg after "${{ github.sha }}" \
            --argjson files "$FILES_JSON" \
            '{
              event_type: "pdf-added",
              client_payload: {
                before: $before,
                after: $after,
                files: $files
              }
            }')

          gh api repos/mozilla/pdf.js.pdfs/dispatches \
            --method POST \
            --input - <<< "$payload"