name: Build woff2 font file

on:
  pull_request:
    types: [synchronize, opened]

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

jobs:
  build:
    runs-on: ubuntu-24.04
    name: build woff2
    steps:
      - name: Detect branch for PR
        id: vars
        run: |
          PR="${{ github.event.pull_request.number }}"

          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 "${PR_INFO}" | jq -r .state)
          BASE_SHA=$(echo "${PR_INFO}" | jq -r .base.sha)

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

          echo "islocalbranch=$(expr $BASE == $GITHUB_REPOSITORY)" >> $GITHUB_OUTPUT
          echo "branch=$REF" >> $GITHUB_OUTPUT
          echo "base=$BASE_SHA" >> $GITHUB_OUTPUT
      - uses: actions/checkout@v6
        with:
          lfs: false
          persist-credentials: false
        if: steps.vars.outputs.branch != ''
      - name: Check ttf changes
        id: ttfcheck
        run: |
          git fetch --depth=1 origin ${{ steps.vars.outputs.base }}

          TTF_FILE_MODIFIED=$(git diff --name-only ${{ steps.vars.outputs.base }} -- plugins/Morpheus/fonts/matomo.ttf | wc -l)

          if [[ $TTF_FILE_MODIFIED == "0" ]]
          then
            echo "Font file not modified"
            exit 0;
          fi

          echo "ttf_modified=1" >> $GITHUB_OUTPUT
        if: steps.vars.outputs.branch != ''
      - name: Build woff2 file
        run: |
          git clone --recursive https://github.com/google/woff2.git tmp_woff2
          cd tmp_woff2
          make clean all
          cd ..
          ./tmp_woff2/woff2_compress plugins/Morpheus/fonts/matomo.ttf
        if: steps.vars.outputs.branch != '' && steps.ttfcheck.outputs.ttf_modified == '1'
      - 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.islocalbranch }} ]]
          then
            git fetch --depth=1 origin $BRANCH_NAME
            git checkout $BRANCH_NAME
          fi
        env:
          BRANCH_NAME: ${{ steps.vars.outputs.branch }}
        if: steps.vars.outputs.branch != '' && steps.ttfcheck.outputs.ttf_modified == '1'
      - name: Push changes
        id: push
        run: |
          if [[ $( git diff --numstat plugins/Morpheus/fonts/matomo.woff2 ) ]]
          then
            if [[ ! ${{ steps.vars.outputs.islocalbranch }} ]]
            then
              echo "It's only possible to update local branches automatically. Adding a comment instead."

              echo "failure=1" >> $GITHUB_OUTPUT
            else
              cd $GITHUB_WORKSPACE
              git add plugins/Morpheus/fonts/matomo.woff2
              git commit -m "Build woff2 file"
              git push
            fi
          fi
        if: steps.vars.outputs.branch != '' && steps.ttfcheck.outputs.ttf_modified == '1'
      - uses: actions/github-script@v8
        with:
          script: |
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: 'woff2 font file is not up to date. See https://developer.matomo.org/guides/matomo-font for details how to update the font correctly.'
            })
        if: steps.push.outputs.failure == '1'
      - name: Fail if not up to date
        run: exit 1
        if: steps.push.outputs.failure == '1'
