If PR reminders too long, split in to multiple messages

scripts/github-pr-reminder.js

@@ -3,19 +3,25 @@ const CronJob = require('cron').CronJob
 require('dotenv').config()
 
 const processUnreviewedPrs = async robot => {
-  const threshold = 3 // number of days since review requested
   const roomId = process.env.HUBOT_DISCORD_DEV_CHANNEL
+  const messages = await getMessages(robot);
+  messages.forEach((chunk) => robot.messageRoom(roomId, chunk.trim()));
+}
+
+const getMessages = async robot => {
+  const threshold = 3 // number of days since review requested
+
   const { getPRs, getPRsWithoutReviews } = prHelpers(robot)
   let response = `The following PRs have not been reviewed in over ${threshold} days:\n`
-
   const prs = await getPRs()
   // The following PRs issued a review request over x days ago and still have no reviews:
   const prsWithoutReviews = await getPRsWithoutReviews(prs, threshold)
   if (prsWithoutReviews.length) {
     prsWithoutReviews.forEach(pr => {
       response += `**PR #${pr.number}:** ${pr.title} <${pr['html_url']}>\n`
     })
-    robot.messageRoom(roomId, response.trim())
+    let responses = splitStringByNewLine(response)
+    return responses;
   }
 }
 
@@ -35,3 +41,23 @@ const setupCronJob = robot => {
 module.exports = function(robot) {
   setupCronJob(robot)
 }
+
+function splitStringByNewLine(str) {
+  const maxLength = 1500;
+  const lines = str.split('\n');
+  let result = [];
+  let currentString = '';
+  lines.forEach((line) => {
+    if (currentString.length + line.length + 1 <= maxLength) {
+      // Add the line to the current string
+      currentString += line + '\n';
+    } else {
+      // Add the current string to the result array and start a new string
+      result.push(currentString);
+      currentString = line + '\n';
+    }
+  });
+  // Add the final string to the result array
+  result.push(currentString);
+  return result;
+}