spam.yml

name: Spam Check

on:
  pull_request:
    types: [opened, edited, synchronize, reopened]

jobs:
  check:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    steps:
      - uses: actions/github-script@v7
        with:
          script: |
            const pull_request = context.payload.pull_request;

            if (pull_request === undefined) {
                console.log("This is not a pull request");
                return;
            }

            const prOpener = pull_request.user.login;

            const { data: contributions } = await github.rest.repos.listContributors({
                owner: context.repo.owner,
                repo: context.repo.repo,
            });

            const prOpenerContributions = contributions.find(
                (contributor) => contributor.login === prOpener
            );

            if (
                prOpenerContributions !== undefined &&
                prOpenerContributions.contributions > 0
            ) {
                console.log("the PR opener has previous contributions");
                return;
            }

            // If the PR opener is not a contributor, check if the body is empty or it contains the default message
            const body = pull_request.body;

            const defaultMessage = "Explain the rationale behind the changes and remove this line"

            if (!body || body.includes(defaultMessage)) {
                // Add a comment to the PR
                await github.rest.issues.createComment({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: pull_request.number,
                    body: "Closing this PR because it does not follow the contribution guidelines.",
                });

                // Close the PR
                await github.rest.pulls.update({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    pull_number: pull_request.number,
                    state: "closed",
                });
            }