Send Slack notification with apps script only with a condition

[Espedito Del Gaudio]

Hello,

with this script I can send a salck notification but I would activate it only if in column 26 there is the text START.
How could I proceed?

const sendMessageToSlack3 = () => {

const reminderText = getReminderText3();

if( reminderText === "") {

return;

}

var payload = {

"channel" : "#XXX",

"username" : "",

"icon_url" : reminderText,

"text" : `:memo: *ATTENZIONE!!!* :face_with_monocle:`,

"attachments": [{

// "text": `:memo: ${quotes[quoteNumber].quote}`,

"text": getReminderText3(),

"type": "image",

"image_url": "",

"footer": "<NOTIFICATION>",

"mrkdwn_in": ["text"]

}]

}

var options = {

"method" : "post",

"contentType" : "application/json",

"payload" : JSON.stringify(payload)

};

var results = UrlFetchApp.fetch( SD_SUBSCRIPTION_WEBHOOK3 , options);

}

const getReminderText3 = () => {

var sheet = SpreadsheetApp.getActive().getSheetByName('XXXX');

var startRow = 2; // Ignore the cloumn hedings row

var numRows = sheet.getLastRow() - 1; // Get the valid number of rows that has content with excluding heading row

var numColumns = sheet.getLastColumn(); // Get the valid number of column that has content

//Get data range dynamically and will return a 2-D array

var dataRange = sheet.getRange(startRow, 1, numRows, numColumns);

var data = dataRange.getValues();

let sendMessageText = "";

for (var i = 0; i < data.length; ++i) {

var row = data[i];

//console.log(row[3]);

var today = new Date(), // today's date

exp_date = row[31] // exp date

var cert_details =

{

domain_name:row[0],

cert_provider_name:row[1],

account: row[2],

cert_manager:row[9],

cert_manager_email:row[4]

};

//Remove the time part from the date

var t2 = new Date(exp_date);

t2.setHours(0,0,0,0);

var t1 = new Date(today);

t1.setHours(0,0,0,0);

//Calculate the ms difference between two date

var difference_ms = (t2.getTime() - t1.getTime());

// 24*3600*1000 is milliseconds in a day

var days_left = Math.round(difference_ms/(24*3600*1000));

//Put the days_left to cert_details array

cert_details.days_left = days_left;

if (days_left == 4) {

sendMessageText += `\n USER: ${cert_details.cert_manager} \n company: ${cert_details.domain_name} remains *4 days\n`;

}

}

return (sendMessageText == "") ? "" : sendMessageText

// return sendMessageText;

}