Gmail to Google Spread Sheet (only date, email and subject) - gmail

Question

The code I have cobbled together does work, but it imports the wrong things from my email. I only want the date sent, the sender email address and the subject to import into the google sheet.
Can anyone help?
function onOpen() {
const spreadsheet = SpreadsheetApp.getActive();
let menuItems = [
{name: 'Gather emails', functionName: 'gather'},
];
spreadsheet.addMenu('SP LEGALS', menuItems);
}
function gather() {
let messages = getGmail();
let curSheet = SpreadsheetApp.getActive();
messages.forEach(message => {curSheet.appendRow(parseEmail(message))});
}
function getGmail() {
const query = "to:legals#salisburypost.com";
let threads = GmailApp.search(query,0,10);
let messages = [];
threads.forEach(thread => {
messages.push(thread.getMessages()[0].getPlainBody());
label.addToThread(thread);
});
return messages;
}
function parseEmail(message){
let parsed = message.replace(/,/g,'')
.replace(/\n*.+:/g,',')
.replace(/^,/,'')
.replace(/\n/g,'')
.split(',');
let result = [0,1,2,3,4,6].map(index => parsed[index]);
return result;
}

Answer 1

I believe your goal as follows.
You want to retrieve "the date, sender and subject" from the 1st message in the searched threads to the active sheet of Google Spreadsheet.
For this, how about this answer?
Modification points:
In this case, you can retrieve "the date, sender and subject" using the built-in methods for GmailApp.
When the values are put to the Spreadsheet, when appendRow is used in the loop, the process cost will become high.
It seems that label is not declared in your script.
When above points are reflected to your script, it becomes as follows.
Modified script:
In this modification, I modified gather() and getGmail() for achieving your goal.
function gather() {
let messages = getGmail();
if (messages.length > 0) {
let curSheet = SpreadsheetApp.getActiveSheet();
curSheet.getRange(curSheet.getLastRow() + 1, 1, messages.length, messages[0].length).setValues(messages);
}
}
function getGmail() {
const query = "to:legals#salisburypost.com";
let threads = GmailApp.search(query,0,10);
let messages = [];
threads.forEach(thread => {
const m = thread.getMessages()[0];
messages.push([m.getDate(), m.getFrom(), m.getSubject()]);
// label.addToThread(thread);
});
return messages;
}
When no threads are retrieved with "to:legals#salisburypost.com", the values are not put to the Spreadsheet. Please be careful this.
References:
getDate()
getFrom()
getSubject()
setValues(values)