pull_request_check.yml

name: Pull Request Content Check

on:
  pull_request:
    branches:
      - 'main'
    types:
      - opened
      - reopened
      - synchronize
      - edited

env:
  SIZE_LABELS: >-
    "Size - XS","Size - S","Size - M","Size - L","Size - XL","Size - XXL"

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  pull_request_content_and_size_check:
    if: github.event.pull_request.merged != true
    name: 'Pull Request Content and Size Check'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 2

      - name: Step 1 - ⚙️ Setup GitHub Config
        run: |
          git config user.name "🤖 Pereira Tech Talks"
          git config user.email "pereiratechtalks@gmail.com"
          gh auth login --with-token <<< "${{ secrets.GITHUB_TOKEN }}"

      - name: Step 2 - 🧪 Check pr size label
        id: check_pr_size_label_step
        env:
          ENV_LABELS: ${{ toJSON(github.event.pull_request.labels) }}
        run: |
          IFS=',' read -ra SIZE_LABELS_ARR <<< "$SIZE_LABELS"
          # Remove the quotes from SIZE_LABELS_ARR
          SIZE_LABELS_ARR=("${SIZE_LABELS_ARR[@]//\"}")

          # Get PR Labels
          FOUND_LABELS_JSON=$(echo "$ENV_LABELS" | jq -r '.[] | .name')

          readarray -t FOUND_LABELS <<<"$FOUND_LABELS_JSON"

          echo "FOUND LABELS:"
          printf '%s\n' "${FOUND_LABELS[@]}"

          # Check if any of the labels in FOUND_LABELS is in SIZE_LABELS_ARR
          for found_label in "${FOUND_LABELS[@]}"; do
            for size_label in "${SIZE_LABELS_ARR[@]}"; do
              if [[ "$found_label" == "$size_label" ]]; then
                echo "Label '$found_label' found in SIZE_LABELS"
                echo "size_label_found=$found_label" >> $GITHUB_OUTPUT
              fi
            done
          done

      - name: Step 3 - 🧪🧪 Calculate PR Size and Label
        run: |
          CURRENT_SIZE="${{ steps.check_pr_size_label_step.outputs.size_label_found }}"
          PR_BASE_REF=${{ github.event.pull_request.base.ref }}
          PR_HEAD_REF=${{ github.event.pull_request.head.ref }}
          git fetch origin $PR_BASE_REF
          git fetch origin $PR_HEAD_REF
          CHANGES_STATS=$(git diff --shortstat origin/$PR_BASE_REF..origin/$PR_HEAD_REF)
          echo $CHANGES_STATS
          LINES_CHANGED=$(echo $CHANGES_STATS | awk '{print $4+$6}')
          echo "Lines changed: $LINES_CHANGED"

          if [ -z "$LINES_CHANGED" ]; then
            echo "No lines changed or diff failed."
            exit 1
          fi

          if [ $LINES_CHANGED -le 50 ]; then
            SIZE="Size - XS"
          elif [ $LINES_CHANGED -le 100 ]; then
            SIZE="Size - S"
          elif [ $LINES_CHANGED -le 500 ]; then
            SIZE="Size - M"
          elif [ $LINES_CHANGED -le 800 ]; then
            SIZE="Size - L"
          elif [ $LINES_CHANGED -le 1500 ]; then
            SIZE="Size - XL"
          else
            SIZE="Size - XXL"
          fi

          echo "Current Size: '$CURRENT_SIZE'"
          echo "New Size: '$SIZE'"

          if [ "$SIZE" == "$CURRENT_SIZE" ]; then
            echo "No size change detected."
            exit 0
          fi

          if [ -n "$CURRENT_SIZE" ]; then
            echo "Removing current size label..."
            CURRENT_SIZE_ENCODED=$(jq -rn --arg str "$CURRENT_SIZE" '$str|@uri')
            curl \
              -X DELETE \
              -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github.v3+json" \
              https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels/$CURRENT_SIZE_ENCODED
          fi

          echo "Adding new size label..."
          curl \
            -X POST \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            -H "Accept: application/vnd.github.v3+json" \
            https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels \
            -d "{\"labels\": [\"${SIZE}\"]}"

          if [ "$SIZE" == "Size - L" ] || [ "$SIZE" == "Size - XL" ] || [ "$SIZE" == "Size - XXL" ]; then
            WARNING_MESSAGE="⚠️ WARNING: This PR is large.\n"
            if [ "$SIZE" == "Size - XL" ] || [ "$SIZE" == "Size - XXL" ]; then
              WARNING_MESSAGE="⚠️ 🔴 WARNING: This PR is too large.\nConsider breaking it down into smaller ones for faster and easier review next time.\n"
            fi
            WARNING_MESSAGE+="Make sure your code has tests and you have done the necessary QA."
            echo "Adding warning comment..."
            curl \
              -X POST \
              -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github.v3+json" \
              https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments \
              -d "{\"body\": \"$WARNING_MESSAGE\"}"
          fi

      - name: Step 4 - 🧪🧪🧪 Check "TITLE" length
        run: |
          MIN_TITLE_LENGTH=10
          PR_TITLE="${{ github.event.pull_request.title }}"
          TITLE_LENGTH=$(echo -n "$PR_TITLE" | wc -c)
          if [ "$TITLE_LENGTH" -lt "$MIN_TITLE_LENGTH" ]; then
            echo "Pull request title is too short. It must have at least $MIN_TITLE_LENGTH characters."
            exit 1
          fi

      - name: Step 5 - 🧪🧪🧪🧪 Check "BODY" length
        run: |
          MIN_BODY_LENGTH=30
          PR_BODY=$(printf "%s" "${{ github.event.pull_request.body }}")
          BODY_LENGTH=$(echo -n "$PR_BODY" | wc -c)
          if [ "$BODY_LENGTH" -lt "$MIN_BODY_LENGTH" ]; then
            echo "Pull request body is too short. It must have at least $MIN_BODY_LENGTH characters."
            exit 1
          fi