generation.yml

name: Code Generation

on:
  workflow_dispatch:
  schedule:
    - cron: '*/15 * * * *'

permissions:
  contents: write
  pull-requests: write

jobs:
  check:
    name: Check for Changes
    runs-on: ubuntu-latest

    env:
      DOCS_URL: https://core.telegram.org/bots/api
      CACHE_DIR: cache

    outputs:
      generate: ${{ steps.check.outputs.generate }}

    steps:
      - name: Calculate Page Hash
        id: page-hash
        run: |
          hash=$(curl -s "${{ env.DOCS_URL }}" | head -n -1 | sha256sum | awk '{print $1}')
          echo "hash=$hash" >> "$GITHUB_OUTPUT"

      - name: Setup Cache
        uses: actions/cache@v4
        with:
          key: page-cache-${{ steps.page-hash.outputs.hash }}
          path: ${{ env.CACHE_DIR }}
          restore-keys: |
            page-cache

      - name: Check for changes
        id: check
        run: |
          generate=false

          # If no cache is available, we should generate to make sure
          if [ ! -f ${{ env.CACHE_DIR }}/hash.txt ]; then
            generate=true
          # else we check the last hash and compare
          else
            last_hash=$(cat ${{ env.CACHE_DIR }}/hash.txt)
            if [ "$last_hash" != "${{ steps.page-hash.outputs.hash }}" ]; then
              generate=true
            fi
          fi

          # Set cache
          mkdir -p "${{ env.CACHE_DIR }}"
          echo "${{ steps.page-hash.outputs.hash }}" > ${{ env.CACHE_DIR }}/hash.txt

          # Set output
          echo "generate=$generate" >> "$GITHUB_OUTPUT"

  generate:
    name: Generate Code
    runs-on: ubuntu-latest
    needs: check
    if: needs.check.outputs.generate == 'true'

    steps:
      - name: Set up PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: '8.2'
          tools: composer

      - name: Checkout Telepath
        uses: actions/checkout@v4
        with:
          path: telepath

      - name: Checkout Generator
        uses: actions/checkout@v4
        with:
          repository: telepath-php/generator
          path: generator

      - name: Install Laravel
        run: |
          cd generator
          composer install --no-dev
          cp .env.example .env
          php artisan key:generate

      - name: Fetch data
        id: data
        run: |
          cd generator
          echo "version=$(php artisan docs:version)" >> "$GITHUB_ENV"
          {
            echo 'changelog<<END_OF_CHANGELOG'
            php artisan docs:changelog
            echo END_OF_CHANGELOG
          } >> "$GITHUB_ENV"

      - name: Generate Code
        env:
          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
        run: |
          cd generator
          php artisan generate ../telepath/src/

      - name: Generate Companion App Token
        id: generate-token
        uses: tibdex/github-app-token@v2
        with:
          app_id: ${{ secrets.COMPANION_APP_ID }}
          private_key: ${{ secrets.COMPANION_APP_PRIVATE_KEY }}

      - name: Commit Changes
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ steps.generate-token.outputs.token }}
          path: telepath
          branch: api-${{ env.version }}
          commit-message: "Update code to reflect latest changes to the Bot API documentation"
          delete-branch: true
          title: "Bot API ${{ env.version }}"
          body: "${{ env.changelog }}"
          labels: |
            Bot API
            auto-generated
            WTD
          reviewers: TiiFuchs