DLTV web scrapping

function scraper() {
    let ss = SpreadsheetApp.openById('1dXDdhTG-3ppO5ybMPTocrkO2y4T222zC1iVCVZuLfIg')
    let sheets = ss.getSheets()
    if (sheets.length > 1) {
        sheets.forEach(function a(s) {
            if (s.getRange(1, 1).getValue() == '') ss.deleteSheet(s)
        })
    }

    let reglevel = /<divclass="hidden-xssm-small\b\S+?\bdiv>/gm
    let url = "https://www.dltv.ac.th/channels/schedules/days/1"
    let options = {
        'muteHttpExceptions': true,
        'followRedirects': false,
    };
    let r = UrlFetchApp.fetch(url, options);
    let html = r.getContentText().replace(/(\r\r|\n|\r)/gm, "").replace(/\s/gm, "").replace(/\//g, "")
    let divlevel = html.match(reglevel)
    let levels = divlevel.map(function a(div) {
        div = div.replace('<divclass="hidden-xssm-small">', '')
            .replace('<div>', '')
        return div
    })

    let timelength = ['', '00:00', '00:30', '01:00', '01:30', '02:00', '02:30', '03:00', '03:30', '04:00', '04:30', '05:00', '05:30', '06:00',
        '06:30', '07:00', '07:30', '08:00', '08:01', '08:30', '09:00', '09:30', '10:00', '10:30', '11:00', '11:30', '12:00',
        '12:30', '13:00', '13:30', '14:00', '14:30', '15:00', '15:30', '16:00', '16:30', '17:00', '17:30', '18:00', '18:01', '18:30',
        '19:00', '19:30', '20:00', '20:30', '21:00', '21:30', '22:00', '22:30', '23:30'
    ]
    let length = timelength.length

    let regcontent = /<divclass="col-md-8"style="background-color:#f9f9f9">\S+?\bdiv>/gm
    let regtime = /<divclass="col-md-2">\b\S+?\bdiv>/gm
    levels.forEach(function a(level, index) {

        try {
            let sheet = ss.insertSheet(level).activate()
            let data = []
            let urls

            sheet.appendRow(timelength)
            for (let j = 5; j <= 6; j++) {
                for (let i = 1; i <= 31; i++) {
                    let date
                    if (i <= 9) date = '2020-0' + j + '-0' + i
                    else date = '2020-0' + j + '-' + i
                    let eachurl = "https://www.dltv.ac.th/channels/schedules/days/" + (index + 1) + "/" + date
                    let r
                    try {
                        r = UrlFetchApp.fetch(eachurl);
                    } catch (e) {
                        r = UrlFetchApp.fetch(eachurl);
                    }

                    let html = r.getContentText().replace(/(\r\r|\n|\r)/gm, "").replace(/\s/gm, "").replace(/\//g, "")


                    let divtime = html.match(regtime)


                    if (divtime != null && divtime.length > 0) {

                        let times = divtime.map(function a(div) {
                            div = div.replace('<divclass="col-md-2">', '').replace('<div>', '')
                            div = div.substring(0, div.length - 3)
                            return div
                        })
                        let divcontent = html.match(regcontent)
                        let contents = divcontent.map(function a(div) {
                            div = div.replace('<divclass="col-md-8"style="background-color:#f9f9f9">', '').replace('<div>', '')
                            return div
                        })
                        let contenttime = Array(length).fill('')
                        times.forEach(function c(t, index) {
                            let t_index = timelength.findIndex(function d(col) {
                                return col == t
                            })
                            contenttime[t_index] = contents[index]
                        })
                        contenttime[0] = i + '/' + j + '/2020'
                            //data.push(contenttime)
                        sheet.appendRow(contenttime)
                    }

                }

            }
            sheet.getRange(1, 1).setValue('วัน/เวลา')
                //  sheet.getRange(2, 1, data.length, data[0].length).setValues(data)
        } catch (e) {

        }

    })

}

function deletelevel() {
    let ss = SpreadsheetApp.openById('1dXDdhTG-3ppO5ybMPTocrkO2y4T222zC1iVCVZuLfIg')
    let level = ['ประถมศึกษาปีที่1', 'ประถมศึกษาปีที่2', 'ประถมศึกษาปีที่3', 'ประถมศึกษาปีที่4', 'ประถมศึกษาปีที่5', 'ประถมศึกษาปีที่6', 'มัธยมศึกษาปีที่1', 'มัธยมศึกษาปีที่2', 'มัธยมศึกษาปีที่3', 'อนุบาลศึกษาปีที่1', 'อนุบาลศึกษาปีที่2', 'อนุบาลศึกษาปีที่3', 'มัธยมศึกษาปีที่4', 'มัธยมศึกษาปีที่5', 'มัธยมศึกษาปีที่6']

    level.forEach(function a(level) {
        try {
            ss.deleteSheet(ss.getSheetByName(level))
        } catch (e) {

        }

    })

}