Templated email using Apps Script based on data in Google Sheets - google-apps-script

Question

I'm new to scripting so I hope someone can help me create one.
I'm trying to create a script for a sheet that can send an email when a custom menu is pressed.
Here's a file to work on.
https://docs.google.com/spreadsheets/d/1Ea-3eZoclHrAkZLwRmWWFbmbnn4dESNWvK_6pn1DCbE/edit?usp=sharing
Also, it should only send it if a column (ex. Column I) has a specific Value like 'Approved'
Email content should look like:
Subject: Leave Application # 'ColumnC'
Hi 'ColumnA',
We received your 'ColumnB' request for 'ColumnE'
Status: 'ColumnG'
More Details: 'ColumnH'
-Admin
Email should be sent to Column E and F.
The script must also update the spreadsheet to avoid duplicate emails.

Answer 1

Here is the working example
Here is the code:
function sendEmails() {
var sheet = SpreadsheetApp.getActiveSpreadsheet();
var startRow = 2; // First row of data to process
var lastRow = sheet.getSheetByName('Journal').getLastRow(); // Last row with content
var rangeEmailSent = sheet.getRangeByName('Journal!EmailSent');
var dataEmailSent = rangeEmailSent.getValues();
var dataRequestedBy = sheet.getRangeByName('Journal!RequestedBy').getValues();
var dataRequestType = sheet.getRangeByName('Journal!RequestType').getValues();
var dataRefNo = sheet.getRangeByName('Journal!RefNo') .getValues();
var dataStatus = sheet.getRangeByName('Journal!Status') .getValues();
var dataToEmail = sheet.getRangeByName('Journal!ToEmail') .getValues();
var dataSupComment = sheet.getRangeByName('Journal!SupervisorComment').getValues();
var subjectTemplate = sheet.getRangeByName('SubjectTemplate1').getValue();
var bodyTemplate = sheet.getRangeByName('BodyTemplate1').getValue();
var msgSubject;
var msgBody;
for (var i = (startRow-1); i <= (lastRow-1); i++) {
// send e-mail if "Email Sent" is not blank and if "Status" is not empty
if ( !(dataEmailSent[i]=='Yes') && !(dataStatus[i] =='')) {
msgSubject = subjectTemplate.replace('$REF$', dataRefNo[i]);
msgBody = bodyTemplate
.replace('$REQUESTED_BY$', dataRequestedBy[i])
.replace('$REQUEST_TYPE$', dataRequestType[i])
.replace('$EMAIL$', dataToEmail[i])
.replace('$STATUS$', dataStatus[i])
.replace('$SupervisorComment$', dataSupComment[i]);
// Logger.log(msgSubject);
// Logger.log(msgBody);
MailApp.sendEmail(dataToEmail[i], msgSubject, msgBody);
// Change "Email sent" to "Yes"
rangeEmailSent.getCell(i+1,1).setValue('Yes'); // note: getCell(1,1) refers to the 1st cell
}
}
}