Dress/.github/workflows/auto_fix.yml

name: Auto-fix Image Files

on:
  issue_comment:
    types: [created]

permissions:
  contents: write
  pull-requests: write
  issues: write

jobs:
  auto-fix:
    name: Auto-fix Images (EXIF & Size)
    if: >
      github.event.issue.pull_request &&
      startsWith(github.event.comment.body, '/auto-fix') &&
      (github.event.comment.author_association == 'OWNER' ||
       github.event.comment.author_association == 'MEMBER' ||
       github.event.comment.author_association == 'COLLABORATOR' ||
       github.event.comment.user.login == github.event.issue.user.login)
    runs-on: ubuntu-latest
    steps:
      - name: Acknowledge command and start processing
        id: init
        uses: actions/github-script@v7
        with:
          script: |
            await github.rest.reactions.createForIssueComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              comment_id: context.payload.comment.id,
              content: "rocket"
            });
            const response = await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: "🚀 自动修复工作中...(Auto-fix initiated! Processing images...)"
            });
            core.setOutput("comment_id", response.data.id);

      - name: Checkout Repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Git identity and auth
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          gh auth setup-git

      - name: Checkout PR branch
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh pr checkout ${{ github.event.issue.number }}

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y --no-install-recommends libimage-exiftool-perl imagemagick jpegoptim optipng pngquant

      - name: Get list of changed image files
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh pr diff ${{ github.event.issue.number }} --name-only | grep -iE '\.(jpe?g|png|webp|tiff?|hei[cf]|avif|gif)$' > changed_images.txt || true
          
          if [ ! -s changed_images.txt ]; then
            echo "No images changed in this PR."
            exit 0
          fi
          
          echo "Changed images to process:"
          cat changed_images.txt

      - name: Process Phase 1 - Remove EXIF Data
        run: |
          if [ ! -s changed_images.txt ]; then exit 0; fi
          
          exif_files_changed=0
          while IFS= read -r file; do
            if [ -f "$file" ]; then
              count=$(exiftool -EXIF:all -S -q -- "$file" 2>/dev/null | wc -l || echo 0)
              if [ "$count" -gt 0 ]; then
                echo "Removing EXIF: $file"
                exiftool -all= -overwrite_original "$file"
                exif_files_changed=1
              fi
            fi
          done < changed_images.txt

          if [ "$exif_files_changed" -eq 1 ]; then
            git add .
            git commit -m "chore: auto-remove EXIF data from images" || true
          fi

      - name: Process Phase 2 - Compress Oversized Images
        id: compress
        continue-on-error: true
        run: |
          if [ ! -s changed_images.txt ]; then exit 0; fi
          
          size_files_changed=0
          failed_files=()
          MAX_SIZE=$((1024 * 1024)) # 1MB Limit
          
          while IFS= read -r file; do
            if [ -f "$file" ]; then
              size=$(stat -c%s "$file" 2>/dev/null || stat -f%z "$file" 2>/dev/null || echo 0)
              if [ "$size" -gt "$MAX_SIZE" ]; then
                echo "Compressing: $file ($size bytes)"
                
                ext="${file##*.}"
                ext_lower=$(echo "$ext" | tr '[:upper:]' '[:lower:]')
                
                case "$ext_lower" in
                  jpg|jpeg)
                    jpegoptim --size=990k "$file" || mogrify -quality 75 "$file"
                    ;;
                  png)
                    # Use pngquant for highly effective lossy PNG compression first
                    pngquant --quality=60-80 --ext .png --force "$file" || optipng -o2 "$file"
                    ;;
                  *)
                    mogrify -quality 75 "$file"
                    ;;
                esac
                
                # Check if file size is successfully reduced under 1MB
                new_size=$(stat -c%s "$file" 2>/dev/null || echo 0)
                if [ "$new_size" -gt "$MAX_SIZE" ]; then
                   echo "Failed to compress $file below 1MB (Current: $new_size bytes)"
                   failed_files+=("$file")
                else
                   size_files_changed=1
                fi
              fi
            fi
          done < changed_images.txt

          if [ ${#failed_files[@]} -gt 0 ]; then
             echo "Some files failed to compress below 1MB."
             {
               echo "failed=true"
               echo "failed_list<<EOF"
               for f in "${failed_files[@]}"; do echo "- $f"; done
               echo "EOF"
             } >> $GITHUB_OUTPUT
             
             # Revert changes to prevent pushing conflicted or partial states
             git reset --hard
             exit 1
          fi

          if [ "$size_files_changed" -eq 1 ]; then
            git add .
            git commit -m "chore: auto-compress oversized images" || true
          fi

      - name: Push Changes
        id: push
        if: steps.compress.outcome != 'failure'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          if ! git diff --quiet @{u}...HEAD; then
            echo "Pushing changes back to the PR branch..."
            git push
          else
            echo "No changes made during processing."
          fi

      - name: Report Completion
        if: always()
        uses: actions/github-script@v7
        with:
          script: |
            const compressOutcome = "${{ steps.compress.outcome }}";
            const failedList = `${{ steps.compress.outputs.failed_list }}`;
            const commentId = `${{ steps.init.outputs.comment_id }}`;
            
            let message = "";
            if (compressOutcome === 'failure' && failedList.trim().length > 0) {
              // Compression failed because some files couldn't be brought under 1MB
              message = `❌ **自动修复未完全成功 (Auto-fix failed to compress some files).**
            
            自动修复算法无法在保持分辨率的前提下，将以下文件压缩至 1MB 以内：
            (The automated algorithm could not compress the following files strictly under 1MB without reducing their resolution:)
            
            ${failedList}
            
            **如何手动修复 (How to fix manually):**
            为了满足通过条件，请您在本地手动将这些图片尺寸缩小（缩小分辨率/长宽），或者转换为更高压缩率的格式后再次提交。
            (Please manually scale down the images' resolution or convert them to a more efficient format and commit again.)
            
            *请放心，为了防止冲突，本次自动化修改已被拦截，没有发起代码推送。*
            *(The auto-fix push was aborted to prevent conflicts.)*`;
            } else if (compressOutcome === 'failure') {
              // Unexpected failure in the compress step
              message = "❌ **自动修复失败 (Auto-fix failed).**\n请查看 [Actions Log](" + context.serverUrl + "/" + context.repo.owner + "/" + context.repo.repo + "/actions/runs/" + context.runId + ") 获取详情。(Please check the Actions Log for details.)";
            } else {
              // success or skipped — everything went fine
              message = "✅ **自动修复成功 (Auto-fix completed successfully)!**\nEXIF 信息已被移除且文件已被压缩（如需要）。(EXIF data removed and files compressed if needed. Check the latest commits.)";
            }
            
            if (commentId && commentId !== "undefined" && commentId !== "") {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: parseInt(commentId, 10),
                body: message
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: message
              });
            }