How to "clip" similar emails and import only part of them in Google Sheets - email

Question

I use a script to import the body of emails to a sheet.
This is the part of the script that imports the body of emails to a sheet
var newReceipts = [];
for (var i = 0; i < foundThreads.length; i++) {
var messages = foundThreads[i].getMessages();
for (var m = 0; m < messages.length; m++) {
var subject = messages[m].getSubject(); //subject field
var body = messages[m].getPlainBody(); //body field
var from = messages[m].getFrom(); //from field
newReceipts.push([subject,body,from]);
A sample text (body) would be:
some text I need to keep,
more text I need....
Did you know that:
bla bla bla and more and more I DON'T need
Another email could be:
Our meeting will take place on Monday
Did you know that:
You cannot be late?
A third email could be:
There is great strain in our group.
The following people please report to the human resources department.
John
Mary
Paul
Did you know that:
A raise is coming next month?
Pay increases tend to vary based on inflation, location, sector, and job performance.
Most employers give their employees an average increase of 3% per year.
Consistent job switching may have an impact on the rate at which your salary increases.
So, there is always a top part, followed by the constant Did you know that:, followed by a bottom part.
I only need to keep the top part of the email before the Did you know that:

Answer 1

In your situation, how about the following sample script?
Sample script:
const check = "Did you know that";
const sample1 = `some text I need to keep,
more text I need....
Did you know that:
bla bla bla and more and more I DON'T need`;
const sample2 = `Our meeting will take place on Monday
Did you know that:
You cannot be late?`;
const sample3 = `There is great strain in our group.
The following people please report to the human resources department.
John
Mary
Paul
Did you know that:
A raise is coming next month?
Pay increases tend to vary based on inflation, location, sector, and job performance.
Most employers give their employees an average increase of 3% per year.
Consistent job switching may have an impact on the rate at which your salary increases.`;
const values = [sample1, sample2, sample3];
const res = values.map(e => e.includes(check) ? e.split(check)[0].trim() : "");
console.log(res)
When this script is run, the following result is obtained.
[
"some text I need to keep, \nmore text I need....",
"Our meeting will take place on Monday",
"There is great strain in our group.\nThe following people please report to the human resources department.\nJohn\nMary\nPaul"
]
When the value of check is not included in the text, "" is returned.
When your showing script is modified, how about the following modification?
var newReceipts = [];
for (var i = 0; i < foundThreads.length; i++) {
var messages = foundThreads[i].getMessages();
for (var m = 0; m < messages.length; m++) {
var subject = messages[m].getSubject(); //subject field
var body = messages[m].getPlainBody(); //body field
// --- Added
const check = "Did you know that";
if (body.includes(check)) {
body = body.split(check)[0].trim();
}
// ---
var from = messages[m].getFrom(); //from field
newReceipts.push([subject,body,from]);
References:
split()
replace()