name: updatemessages
on:
  schedule:
    - cron: '0 0 * * *'
jobs:
  updatemessages:
    if: github.repository == 'DMOJ/online-judge'
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0
    - name: Set up Python 3.7
      uses: actions/setup-python@v5
      with:
        python-version: '3.7'
    - name: Checkout submodules
      run: |
        git submodule init
        git submodule update
    - name: Install requirements
      run: |
        sudo apt-get install gettext
        wget https://artifacts.crowdin.com/repo/deb/crowdin3.deb -O crowdin.deb
        sudo dpkg -i crowdin.deb
        pip install -r requirements.txt
        pip install pymysql
    - name: Update English source strings
      run: |
        echo "STATIC_ROOT = '/tmp'" > dmoj/local_settings.py
        python manage.py makemessages -l en -e py,html,txt
        python manage.py makemessages -l en -d djangojs
    - name: Download strings from Crowdin
      env:
        CROWDIN_API_TOKEN: ${{ secrets.CROWDIN_API_V2_TOKEN }}
      run: |
        cat > crowdin.yaml <<EOF
        project_id: 142963

        files:
          - source: /locale/en/LC_MESSAGES/django.po
            translation: /locale/%two_letters_code%/LC_MESSAGES/django.po
            languages_mapping:
              two_letters_code:
                zh-CN: zh_Hans
                zh-TW: zh_Hant
                sr-CS: sr_Latn
          - source: /locale/en/LC_MESSAGES/djangojs.po
            translation: /locale/%two_letters_code%/LC_MESSAGES/djangojs.po
            languages_mapping:
              two_letters_code:
                zh-CN: zh_Hans
                zh-TW: zh_Hant
                sr-CS: sr_Latn
        EOF
        echo "api_token: ${CROWDIN_API_TOKEN}" >> crowdin.yaml
        crowdin download
        rm crowdin.yaml
    - name: Cleanup
      run: |
        rm -rf src/
        git add locale
        git checkout .
        git clean -fd
        git reset
    - name: Remove useless changes
      run: |
        set -eu
        i18n_head=$(git rev-parse --verify -q origin/update-i18n || echo "HEAD")
        echo "Comparing against: $i18n_head"
        changed=0
        while IFS= read -r -d $'\0' file; do
          if git diff -s --exit-code "$file"; then
            continue
          fi

          if git diff "$i18n_head" -- "$file" | tail -n +5 2>/dev/null | grep -qP '^[-+](?!"PO-Revision-Date:|"POT-Creation-Date:)'; then
            echo "Changed: $file"
            changed=1
          else
            echo "No material change: $file"
            git checkout "$i18n_head" -- "$file" > /dev/null 2>&1
          fi
        done < <(git ls-files -z 'locale/*/LC_MESSAGES/*.po')

        if [ "$changed" = 0 ]; then
          git reset --hard "$i18n_head"
        fi
    - name: Create pull request
      uses: peter-evans/create-pull-request@v6
      with:
        token: ${{ secrets.REPO_SCOPED_TOKEN }}
        author: dmoj-build <build@dmoj.ca>
        committer: dmoj-build <build@dmoj.ca>
        commit-message: 'i18n: update translations from Crowdin'
        title: Update translations from Crowdin
        body: This PR has been auto-generated to pull in latest translations from [Crowdin](https://translate.dmoj.ca).
        labels: i18n, enhancement
        reviewers: Xyene, quantum5
        branch: update-i18n