Extract Email Text from Google Sheet using App Script

ExtractSpecificTextFromEmail.txt

var ui = SpreadsheetApp.getUi();
function onOpen(e){
  ui.createMenu("Gmail Manager").addItem("Get Emails by Label", "getGmailEmails").addToUi();
}

function getGmailEmails(){
  var input = ui.prompt('Label Name', 'Enter the label name that is assigned to your emails:', Browser.Buttons.OK_CANCEL);
  
  if (input.getSelectedButton() == ui.Button.CANCEL){
    return;
  }
  
  var label = GmailApp.getUserLabelByName(input.getResponseText().trim());
  var threads = label.getThreads();
    
  for(var i = threads.length - 1; i >=0; i--){
    var messages = threads[i].getMessages();
    
    for (var j = 0; j <messages.length; j++){
      var message = messages[j];
      if (message){
       extractDetails(message);
       }
    }
  }
  
}

function extractDetails(message){
  
  var emailData = {
    body: "Null",
    fullName: "Null",
    emailAddr: "Null"
  }
  var emailKeywords = {
    fullName: "Name:",
    emailAddr: "Email:"
  }
  
  emailData.body = message.getPlainBody();
    
  var regExp;
  
  regExp = new RegExp("(?<=" + emailKeywords.fullName + ").*");
  emailData.fullName = emailData.body.match(regExp).toString().trim();
  
  regExp = new RegExp("(?<=" + emailKeywords.emailAddr + ").*");
  emailData.emailAddr = emailData.body.match(regExp).toString().trim();
  
  var activeSheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
  
  var emailDataArr = [];
  
    emailDataArr.push(emailData.fullName);
    emailDataArr.push(emailData.emailAddr);
  
  activeSheet.appendRow(emailDataArr);
}

This was modified to:

• extract fields named 'Name:' and 'Email:' only.

• search for any existing messages rather than unread messages [line 21]

• not remove the message's label after parsing

• not mark the message read after parsing