pr-labeler.yml

name: PR Labeler

on:
  pull_request_target:
    types: [opened, synchronize, reopened]

permissions:
  contents: read
  pull-requests: write
  issues: write
  actions: read  # Add this for better token access

jobs:
  label:
    runs-on: ubuntu-latest
    # if: false  # Temporarily disabled to fix CI
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Label PR based on changed files
        uses: actions/github-script@v7
        continue-on-error: true
        with:
          script: |
            const { data: files } = await github.rest.pulls.listFiles({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number
            });
            
            const labels = new Set();
            
            for (const file of files) {
              const filename = file.filename;
              
              // Contract labels
              if (filename.startsWith('contracts/teachlink/')) {
                labels.add('contract: teachlink');
              }
              if (filename.startsWith('contracts/insurance/')) {
                labels.add('contract: insurance');
              }
              
              // Module labels
              if (filename.includes('bridge')) {
                labels.add('module: bridge');
              }
              if (filename.includes('escrow')) {
                labels.add('module: escrow');
              }
              
              // Type labels based on file type
              if (filename.endsWith('.md')) {
                labels.add('documentation');
              }
              if (filename.includes('test') || filename.includes('spec')) {
                labels.add('testing');
              }
              if (filename.startsWith('scripts/') || filename.startsWith('.github/')) {
                labels.add('tooling');
              }
              if (filename.startsWith('config/')) {
                labels.add('configuration');
              }
            }
            
            // Size labels based on changes
            const additions = files.reduce((sum, f) => sum + f.additions, 0);
            const deletions = files.reduce((sum, f) => sum + f.deletions, 0);
            const changes = additions + deletions;
            
            if (changes < 10) {
              labels.add('size: xs');
            } else if (changes < 50) {
              labels.add('size: s');
            } else if (changes < 200) {
              labels.add('size: m');
            } else if (changes < 500) {
              labels.add('size: l');
            } else {
              labels.add('size: xl');
            }
            
            // Apply labels with error handling
            if (labels.size > 0) {
              try {
                await github.rest.issues.addLabels({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number,
                  labels: Array.from(labels)
                });
              } catch (error) {
                console.log('Failed to add labels:', error.message);
                // Try to create labels that don't exist
                for (const label of labels) {
                  try {
                    await github.rest.issues.createLabel({
                      owner: context.repo.owner,
                      repo: context.repo.repo,
                      name: label,
                      color: '0366d6'
                    });
                  } catch (labelError) {
                    console.log(`Label ${label} already exists or failed to create:`, labelError.message);
                  }
                }
                
                // Try adding labels again
                try {
                  await github.rest.issues.addLabels({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: context.issue.number,
                    labels: Array.from(labels)
                  });
                } catch (retryError) {
                  console.log('Failed to add labels after creation:', retryError.message);
                }
              }
            }

  # Check PR title format
  title-check:
    runs-on: ubuntu-latest
    # if: false  # Temporarily disabled to fix CI
    permissions:
      pull-requests: write
      issues: write
    steps:
      - name: Check PR title
        uses: actions/github-script@v7
        continue-on-error: true
        with:
          script: |
            const title = context.payload.pull_request.title;
            
            // Expected format: type(scope): description
            // e.g., feat(contract): add reward distribution
            const conventionalCommitRegex = /^(feat|fix|docs|style|refactor|test|chore|perf|ci|build|revert)(\(.+\))?: .+/;
            
            if (!conventionalCommitRegex.test(title)) {
              const body = `
            ⚠️ **PR Title Format**
            
            Please update your PR title to follow the conventional commit format:
            
            \`\`\`
            type(scope): description
            \`\`\`
            
            **Types:** feat, fix, docs, style, refactor, test, chore, perf, ci, build, revert
            
            **Examples:**
            - \`feat(contract): add learning reward distribution\`
            - \`fix(escrow): resolve timeout calculation bug\`
            - \`docs: update contributing guidelines\`
            
            See [CONTRIBUTING.md](https://github.com/${context.repo.owner}/${context.repo.repo}/blob/main/CONTRIBUTING.md) for details.
              `;
              
              // Check if we already commented about this
              try {
                const { data: comments } = await github.rest.issues.listComments({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number
                });
                
                const hasWarning = comments.some(c => c.body.includes('PR Title Format'));
                
                if (!hasWarning) {
                  await github.rest.issues.createComment({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: context.issue.number,
                    body: body
                  });
                }
              } catch (error) {
                console.log('Failed to check/create title format comment:', error.message);
              }
            }

  # Welcome first-time contributors
  welcome:
    runs-on: ubuntu-latest
    if: github.event.action == 'opened'
    steps:
      - name: Check if first-time contributor
        id: check
        uses: actions/github-script@v7
        continue-on-error: true
        with:
          script: |
            const creator = context.payload.pull_request.user.login;
            
            // Check for previous PRs
            const { data: prs } = await github.rest.pulls.list({
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'all',
              per_page: 100
            });
            
            const userPRs = prs.filter(pr => pr.user.login === creator);
            return userPRs.length === 1;
          result-encoding: string

      - name: Welcome message
        if: steps.check.outputs.result == 'true'
        uses: actions/github-script@v7
        continue-on-error: true
        with:
          script: |
            const message = `
            🎉 **Welcome to TeachLink, @${context.payload.pull_request.user.login}!**
            
            Thank you for your first contribution! A maintainer will review your PR soon.
            
            **While you wait:**
            - Make sure all CI checks pass ✅
            - Review the [PR checklist](https://github.com/${context.repo.owner}/${context.repo.repo}/blob/main/.github/PULL_REQUEST_TEMPLATE.md)
            - Join our [Discord](https://discord.gg/teachlink) to connect with the community
            
            We appreciate your contribution to decentralized education! 🎓
            `;
            
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: message
            });