name: Happy Pancakes
on:
  pull_request:
    types: [opened, edited, labeled, unlabeled, synchronize, ready_for_review, auto_merge_enabled, auto_merge_disabled]
jobs:
  check_status:
    name: Check Required Status or force-merge label
    runs-on: ubuntu-latest
    steps:
      # Cancel current runs if they're still running
      # (saves processing on fast pushes)
      - name: Cancel Previous Runs
        uses: styfle/cancel-workflow-action@0.9.1
        with:
          access_token: ${{ github.token }}
      # Wait until our required statuses are ready or failed
      # Unless force-merge is present, and then just be good.
      - name: Check Status
        uses: actions/github-script@v4
        with:
          script: |
            function sleep(ms) {
              return new Promise(resolve => setTimeout(resolve, ms));
            }
            let pull = await github.pulls.get({
              owner: "grpc",
              repo: "grpc",
              pull_number: ${{ github.event.pull_request.number }}
            });
            for (var i = 0; i < pull.data.labels.length; i++) {
              let label = pull.data.labels[i];
              if (label.name == "force-merge") {
                console.log("Saw force-merge label");
                return;
              }
            }
            while (true) {
              var need = new Set();
              need.add("Bazel Basic build for C/C++");
              need.add("Portability Tests Linux [Build Only] (internal CI)");
              for (var page=1;; page++) {
                console.log("***** page " + page);
                let statuses = await github.repos.listCommitStatusesForRef({
                  owner: "grpc",
                  repo: "grpc",
                  ref: "${{ github.event.pull_request.head.sha }}",
                  per_page: 100,
                  page: page
                });
                for (var i = 0; i < statuses.data.length; i++) {
                  let status = statuses.data[i];
                  console.log(status.context, status.state, need);
                  if (need.has(status.context)) {
                    if (status.state == "success") {
                      need.delete(status.context);
                    } else if (status.state == "pending") {
                      // do nothing
                    } else {
                      core.setFailed("Required status failed: " + status.context);
                      return;
                    }
                  }
                }
                if (statuses.data.length < 100) {
                  break;
                }
              }
              if (need.size == 0) {
                return;
              }
              // Sleep 15 minutes between polls
              await sleep(15 * 60 * 1000);
            }