Support "issue_comment" event

[josteph]

If an action is triggered via issue_comment, the PR number object might be different.

CI File

on:
  issue_comment:
    types:
      - created

jobs:
  build-comment:
    if: |
      github.event.issue.pull_request &&
        (github.event.comment.body == 'ping')
    runs-on: ubuntu-latest
    permissions:
      contents: write
      id-token: write
      pull-requests: write

    steps:
      - uses: actions/checkout@v2

      - name: Comment to PR with zipped file
        uses: exercism/pr-commenter-action@v1.3.0
        with:
          github-token: ${{ github.token }}
          config-file: ".github/pr-commenter.yml"

Technical Details

The getPRNumber function needs to be updated

pr-commenter-action/lib/run.js

Line 78 in 47beb19

function getPrNumber() {

function getPrNumber() {
  const pullRequest = github.context.payload.pull_request || github.event.issue;
  if (!pullRequest) {
    return undefined;
  }

  return pullRequest.number;
}

GitHub Context Dump

{
    "event": {
      "action": "created",
      "comment": {
        "author_association": "CONTRIBUTOR",
        "body": "e2e",
        "created_at": "2022-04-26T08:47:20Z",
        "html_url": "https://github.com/org/repo-name/pull/173#issuecomment-1109524822",
        "id": 0,
        "issue_url": "https://api.github.com/repos/org/repo-name/issues/173",
        "node_id": "",
        "performed_via_github_app": null,
        "reactions": {
          "+1": 0,
          "-1": 0,
          "confused": 0,
          "eyes": 0,
          "heart": 0,
          "hooray": 0,
          "laugh": 0,
          "rocket": 0,
          "total_count": 0,
          "url": "https://api.github.com/repos/org/repo-name/issues/comments/1109524822/reactions"
        },
        "updated_at": "2022-04-26T08:47:20Z",
        "url": "https://api.github.com/repos/org/repo-name/issues/comments/1109524822",
        "user": {
          "avatar_url": "https://avatars.githubusercontent.com/u/13672022?v=4",
          "events_url": "https://api.github.com/users/user/events{/privacy}",
          "followers_url": "https://api.github.com/users/user/followers",
          "following_url": "https://api.github.com/users/user/following{/other_user}",
          "gists_url": "https://api.github.com/users/user/gists{/gist_id}",
          "gravatar_id": "",
          "html_url": "https://github.com/user",
          "id": 13672022,
          "login": "user",
          "node_id": "",
          "organizations_url": "https://api.github.com/users/user/orgs",
          "received_events_url": "https://api.github.com/users/user/received_events",
          "repos_url": "https://api.github.com/users/user/repos",
          "site_admin": false,
          "starred_url": "https://api.github.com/users/user/starred{/owner}{/repo}",
          "subscriptions_url": "https://api.github.com/users/user/subscriptions",
          "type": "User",
          "url": "https://api.github.com/users/user"
        }
      },
      "issue": {
        "active_lock_reason": null,
        "assignee": null,
        "assignees": [],
        "author_association": "CONTRIBUTOR",
        "body": "",
        "closed_at": null,
        "comments": 3,
        "comments_url": "https://api.github.com/repos/org/repo-name/issues/173/comments",
        "created_at": "2022-04-26T08:31:23Z",
        "draft": false,
        "events_url": "https://api.github.com/repos/org/repo-name/issues/173/events",
        "html_url": "https://github.com/org/repo-name/pull/173",
        "id": 0,
        "labels": [],
        "labels_url": "https://api.github.com/repos/org/repo-name/issues/173/labels{/name}",
        "locked": false,
        "milestone": null,
        "node_id": "",
        "number": 173,
        "performed_via_github_app": null,
        "pull_request": {
          "diff_url": "https://github.com/org/repo-name/pull/173.diff",
          "html_url": "https://github.com/org/repo-name/pull/173",
          "merged_at": null,
          "patch_url": "https://github.com/org/repo-name/pull/173.patch",
          "url": "https://api.github.com/repos/org/repo-name/pulls/173"
        },
        "reactions": {
          "+1": 0,
          "-1": 0,
          "confused": 0,
          "eyes": 0,
          "heart": 0,
          "hooray": 0,
          "laugh": 0,
          "rocket": 0,
          "total_count": 0,
          "url": "https://api.github.com/repos/org/repo-name/issues/173/reactions"
        },
        "repository_url": "https://api.github.com/repos/org/repo-name",
        "state": "open",
        "timeline_url": "https://api.github.com/repos/org/repo-name/issues/173/timeline",
        "title": "ci: dummy test",
        "updated_at": "2022-04-26T08:47:20Z",
        "url": "https://api.github.com/repos/org/repo-name/issues/173",
        "user": {
          "avatar_url": "https://avatars.githubusercontent.com/u/13672022?v=4",
          "events_url": "https://api.github.com/users/user/events{/privacy}",
          "followers_url": "https://api.github.com/users/user/followers",
          "following_url": "https://api.github.com/users/user/following{/other_user}",
          "gists_url": "https://api.github.com/users/user/gists{/gist_id}",
          "gravatar_id": "",
          "html_url": "https://github.com/user",
          "id": 0,
          "login": "user",
          "node_id": "",
          "organizations_url": "https://api.github.com/users/user/orgs",
          "received_events_url": "https://api.github.com/users/user/received_events",
          "repos_url": "https://api.github.com/users/user/repos",
          "site_admin": false,
          "starred_url": "https://api.github.com/users/user/starred{/owner}{/repo}",
          "subscriptions_url": "https://api.github.com/users/user/subscriptions",
          "type": "User",
          "url": "https://api.github.com/users/user"
        }
      },
}