name: Run PR Checks

on:
  pull_request:

jobs:
  validate_icons:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
      with:
        fetch-depth: 0

    - uses: nrwl/nx-set-shas@v3
      id: last_successful_commit_push
      with:
        main-branch-name: master
        workflow-id: 'pr_checks.yml'

    - name: Get changed icons
      id: changed-icons
      uses: tj-actions/changed-files@v35
      with:
        files: _data/icons/*.json
        base_sha: ${{ steps.last_successful_commit_push.outputs.base }}

    - name: Configure npm Caching
      uses: actions/cache@v2
      if: steps.changed-icons.outputs.any_changed == 'true'
      with:
        path: ~/.npm
        key: ${{ runner.os }}-npm-${{ hashFiles('**/workflows/validate_json.yml') }}
        restore-keys: |
          ${{ runner.os }}-npm-

    - run: sudo apt-get -y install jq curl exiftool

    - name: Verify the changed icons
      if: steps.changed-icons.outputs.any_changed == 'true'
      run: |
        set -euo pipefail

        BAD=0

        for CHANGED_FILE in ${{ steps.changed-icons.outputs.all_changed_files }}; do
          echo "Checking icon $CHANGED_FILE"
          URL=$(cat "$CHANGED_FILE" | jq '.[0].url' -r)
          if [[ "$URL" =~ ^ipfs://([A-Za-z0-9]+)$ ]]; then
            echo "Trying to download the image..."
            curl -Lo icon "https://cloudflare-ipfs.com/ipfs/${BASH_REMATCH[1]}" 2>/dev/null
            METADATA=$(exiftool icon -json)
            
            SCHEMA_WIDTH=$(cat "$CHANGED_FILE" | jq '.[0].width' -r)
            SCHEMA_HEIGHT=$(cat "$CHANGED_FILE" | jq '.[0].height' -r)
            SCHEMA_TYPE=$(cat "$CHANGED_FILE" | jq '.[0].format' -r)
            META_WIDTH=$(echo "$METADATA" | jq '.[0].ImageWidth' -r)
            META_HEIGHT=$(echo "$METADATA" | jq '.[0].ImageHeight' -r)
            META_TYPE=$(echo "$METADATA" | jq '.[0].FileTypeExtension' -r)

            if [ "$SCHEMA_WIDTH" != "$META_WIDTH" ]; then
              echo "Expected width $SCHEMA_WIDTH, got $META_WIDTH"
              BAD=1
            fi

            if [ "$SCHEMA_HEIGHT" != "$META_HEIGHT" ]; then
              echo "Expected height $SCHEMA_HEIGHT, got $META_HEIGHT"
              BAD=1
            fi

            case "$SCHEMA_TYPE" in
              png)
                if [ "$META_TYPE" != "png" ]; then
                  echo "Expected type png, got $META_TYPE"
                  BAD=1
                fi
                ;;
              jpg)
                if [ "$META_TYPE" != "jpg" ]; then
                  echo "Expected type jpg, got $META_TYPE"
                  BAD=1
                fi
                ;;
              svg)
                if [ "$META_TYPE" != "svg" ]; then
                  echo "Expected type svg, got $META_TYPE"
                  BAD=1
                fi
                ;;
              *)
                echo "Expected type png, jpg, or svg, got $SCHEMA_TYPE"
                BAD=1
                ;;
            esac
          else
            echo "Expected an IPFS URL, got $URL"
            BAD=1
          fi
        done
        exit $BAD