Add PR merged comment on pull request closure

index.js

@@ -4,6 +4,7 @@ const utils = require("./utils.js");
 const WAIT_TIME_AFTER_EACH_FILE = 30000; // 30 seconds
 const IGNORE_LABELS = ["maintainer"];
 const IGNORE_TITLES = ["no-rm", "rm-skip"];
+const PR_MERGED_CONTENT_LINK = "https://raw.githubusercontent.com/is-a-dev/team-docs/main/pr-merged.md"
 
 /**
  * This is the main entrypoint to your Probot app
@@ -16,6 +17,22 @@ module.exports = (app) => {
     throw new Error("Missing Environment Variable: IMGBB_KEY");
 
   app.log.info("The app was loaded!");
+  app.on([
+    "pull_request.closed",
+  ],
+  async (context) => {
+    if (context.payload.pull_request.merged !== true) {
+      return;
+    }
+    const { owner, repo, pull_number } = context.pullRequest();
+    const pr_merged_message = await utils.getRawFileContent(PR_MERGED_CONTENT_LINK);
+    await context.octokit.issues.createComment({
+      owner,
+      repo,
+      issue_number: pull_number,
+      body: pr_merged_message,
+    });
+  })
   app.on(
     [
       "pull_request.opened",