name: Crowdin Download

on:
  schedule:
    - cron: "0 3 * * 1" # Runs every Monday at 03:00 UTC
  workflow_dispatch:
  workflow_call: # Called by the release workflow so every release ships the latest translations
    outputs:
      commit:
        description: Commit on main that contains the latest translations
        value: ${{ jobs.download.outputs.commit }}
    secrets:
      CROWDIN_PERSONAL_TOKEN:
        required: true
      BOT_APP_PRIVATE_KEY:
        required: true

permissions:
  contents: read

jobs:
  download:
    runs-on: ubuntu-latest
    concurrency:
      group: crowdin-download
      cancel-in-progress: false
    outputs:
      commit: ${{ steps.commit.outputs.commit }}

    steps:
      # The checked out commit is pushed to main, so running from any other branch could publish unrelated commits
      - name: Require the main branch
        run: |
          if [[ "$GITHUB_REF" != refs/heads/main ]]; then
            echo "::error::Translations can only be downloaded from main."
            exit 1
          fi

      - name: Checkout repository
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          ref: ${{ github.sha }}
          persist-credentials: false

      - name: Download translations
        uses: crowdin/github-action@9c23991700c0ec5256fd41089b9d9d7d540e424e # v3.3.0
        with:
          upload_sources: false
          upload_translations: false
          download_translations: true
          push_translations: false
          create_pull_request: false
          crowdin_branch_name: "[pocket-id.pocket-id] main"
          user: auto
        env:
          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}

      - name: Create bot app token
        id: app-token
        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
        with:
          client-id: ${{ vars.BOT_APP_CLIENT_ID }}
          private-key: ${{ secrets.BOT_APP_PRIVATE_KEY }}
          permission-contents: write

      - name: Commit translations to main
        id: commit
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
          APP_SLUG: ${{ steps.app-token.outputs.app-slug }}
        run: |
          # Attribute the commit to the app and authenticate the push with its installation token
          bot_name="${APP_SLUG}[bot]"
          bot_id=$(gh api "users/$bot_name" --jq .id)
          git config user.name "Pocket ID Bot"
          git config user.email "$bot_id+$bot_name@users.noreply.github.com"
          gh auth setup-git

          # Only commit when Crowdin returned different translations
          git add frontend/messages/*.json
          if git diff --cached --quiet; then
            echo "Translations are already up to date." >> "$GITHUB_STEP_SUMMARY"
          else
            git commit -m "chore(translations): update translations via Crowdin"
            git push origin HEAD:refs/heads/main
            echo "Committed updated translations to main." >> "$GITHUB_STEP_SUMMARY"
          fi

          echo "commit=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"