name: Build Tracker JS files

on:
  issue_comment:
    types: [created]

permissions:
  actions: read
  checks: none
  contents: write
  deployments: none
  issues: read
  packages: none
  pull-requests: write
  repository-projects: none
  security-events: none
  statuses: none

jobs:
  build:
    runs-on: ubuntu-24.04

    steps:
    - name: Detect branch for PR
      id: vars
      run: |
        PR=$( echo "${{ github.event.comment.issue_url }}" | grep -oE 'issues/([0-9]+)$' | cut -d'/' -f 2 )

        PR_INFO=$( curl \
                 --request GET \
                 --header 'authorization: Bearer ${{ secrets.GITHUB_TOKEN }}' \
                 --header 'content-type: application/json' \
                 --url https://api.github.com/repos/$GITHUB_REPOSITORY/pulls/$PR )
        REF=$(echo "${PR_INFO}" | jq -r .head.ref)
        BASE=$(echo "${PR_INFO}" | jq -r .head.repo.full_name)
        STATE=$(echo "${PR_INFO}" | jq -r .state)

        if [[ $STATE == "closed" ]]
        then
          echo "Pull Request already closed."
          exit 0;
        fi

        if [[ $BASE != $GITHUB_REPOSITORY ]]
        then
          echo "It's only possible to update local branches"
          exit 0;
        fi

        echo "branch=$REF" >> $GITHUB_OUTPUT
      if: github.event.comment.body == 'build js'
    - uses: actions/setup-java@v5
      with:
        distribution: 'zulu'
        java-version: '9'
      if: steps.vars.outputs.branch != ''
    - uses: actions/checkout@v6
      with:
        ref: ${{ steps.vars.outputs.branch }}
        lfs: false
        persist-credentials: false
      if: steps.vars.outputs.branch != ''
    - name: Prepare git config
      run: |
          cat <<- EOF > $HOME/.netrc
            machine github.com
            login $GITHUB_ACTOR
            password $GITHUB_TOKEN
            machine api.github.com
            login $GITHUB_ACTOR
            password $GITHUB_TOKEN
          EOF
          chmod 600 $HOME/.netrc
          git config --global user.email "$GITHUB_ACTOR@users.noreply.github.com"
          git config --global user.name "$GITHUB_ACTOR"
          git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
      if: steps.vars.outputs.branch != ''
    - name: Fetch YUICompressor
      run: |
        cd $GITHUB_WORKSPACE/js
        wget https://github.com/yui/yuicompressor/releases/download/v2.4.8/yuicompressor-2.4.8.zip
        unzip yuicompressor-2.4.8.zip
      if: steps.vars.outputs.branch != ''
    - name: Build JS files
      run: |
        cd $GITHUB_WORKSPACE/js
        sed '/<DEBUG>/,/<\/DEBUG>/d' < piwik.js | sed 's/eval/replacedEvilString/' | java -jar yuicompressor-2.4.8.jar --type js --line-break 1000 | sed 's/replacedEvilString/eval/' | sed 's/^[/][*]/\/*!/' > piwik.min.js && cp piwik.min.js ../piwik.js && cp piwik.min.js ../matomo.js
      if: steps.vars.outputs.branch != ''
    - name: Push changes
      run: |
          if [[ $( git diff --numstat ) ]]
          then
            cd $GITHUB_WORKSPACE
            git add piwik.js matomo.js js/piwik.min.js
            git commit -m "Build tracker JS files"
            git push
          fi
      if: steps.vars.outputs.branch != ''
