Issue number (#64)

* Major code reorg
* Add issue arg
* Paginate existing comment list

src/comments.ts

@@ -0,0 +1,71 @@
+import { GitHub } from '@actions/github/lib/utils'
+import { Endpoints } from '@octokit/types'
+
+export type CreateIssueCommentResponseData =
+  Endpoints['POST /repos/{owner}/{repo}/issues/{issue_number}/comments']['response']['data']
+
+export async function getExistingCommentId(
+  octokit: InstanceType<typeof GitHub>,
+  owner: string,
+  repo: string,
+  issueNumber: number,
+  messageId: string,
+): Promise<number | undefined> {
+  const parameters = {
+    owner,
+    repo,
+    issue_number: issueNumber,
+    per_page: 100,
+  }
+
+  let found
+
+  for await (const comments of octokit.paginate.iterator(
+    octokit.rest.issues.listComments,
+    parameters,
+  )) {
+    found = comments.data.find(({ body }) => {
+      return (body?.search(messageId) ?? -1) > -1
+    })
+
+    if (found) {
+      break
+    }
+  }
+
+  return found?.id
+}
+
+export async function updateComment(
+  octokit: InstanceType<typeof GitHub>,
+  owner: string,
+  repo: string,
+  existingCommentId: number,
+  body: string,
+): Promise<CreateIssueCommentResponseData> {
+  const updatedComment = await octokit.rest.issues.updateComment({
+    comment_id: existingCommentId,
+    owner,
+    repo,
+    body,
+  })
+
+  return updatedComment.data
+}
+
+export async function createComment(
+  octokit: InstanceType<typeof GitHub>,
+  owner: string,
+  repo: string,
+  issueNumber: number,
+  body: string,
+): Promise<CreateIssueCommentResponseData> {
+  const createdComment = await octokit.rest.issues.createComment({
+    issue_number: issueNumber,
+    owner,
+    repo,
+    body,
+  })
+
+  return createdComment.data
+}