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iampato/main.ts

Created February 14, 2024 14:12
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  1. iampato created this gist Feb 14, 2024.
    111 changes: 111 additions & 0 deletions main.ts
    View file
    Original file line number Diff line number Diff line change
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    // Generate voucher number
    // using mpesa transaction reference format -> YYMMDDHHmmssNNNN
    export function generateVoucherNumber(): string {
    const now = new Date();
    const yearMap = {
    '20': 'A',
    '21': 'B',
    '22': 'C',
    '23': 'D',
    '24': 'E',
    '25': 'F',
    '26': 'G',
    '27': 'H',
    '28': 'I',
    '29': 'J',
    '30': 'K',
    // Add more mappings as needed
    };
    const monthMap = {
    '01': 'A',
    '02': 'B',
    '03': 'C',
    '04': 'D',
    '05': 'E',
    '06': 'F',
    '07': 'G',
    '08': 'H',
    '09': 'I',
    '10': 'J',
    '11': 'K',
    '12': 'L',
    };

    const dayMap = {
    '01': 'A',
    '02': 'B',
    '03': 'C',
    '04': 'D',
    '05': 'E',
    '06': 'F',
    '07': 'G',
    '08': 'H',
    '09': 'I',
    '10': 'J',
    '11': 'K',
    '12': 'L',
    '13': 'M',
    '14': 'N',
    '15': 'O',
    '16': 'P',
    '17': 'Q',
    '18': 'R',
    '19': 'S',
    '20': 'T',
    '21': 'U',
    '22': 'V',
    '23': 'W',
    '24': 'X',
    '25': 'Y',
    '26': 'Z',
    '27': 'a',
    '28': 'b',
    '29': 'c',
    '30': 'd',
    '31': 'e',
    };

    const hourMap = {
    '00': 'A',
    '01': 'B',
    '02': 'C',
    '03': 'D',
    '04': 'E',
    '05': 'F',
    '06': 'G',
    '07': 'H',
    '08': 'I',
    '09': 'J',
    '10': 'K',
    '11': 'L',
    '12': 'M',
    '13': 'N',
    '14': 'O',
    '15': 'P',
    '16': 'Q',
    '17': 'R',
    '18': 'S',
    '19': 'T',
    '20': 'U',
    '21': 'V',
    '22': 'W',
    '23': 'X',
    };

    const year = now.getFullYear().toString().slice(-2);
    const month = String(now.getMonth() + 1).padStart(2, '0');
    const day = String(now.getDate()).padStart(2, '0');
    const hour = String(now.getHours()).padStart(2, '0');
    const minute = String(now.getSeconds()).padStart(2, '0');

    const randomNum = Math.floor(1000 + Math.random() * 9000);

    const yearLetter = yearMap[year] || year;
    const monthLetter = monthMap[month] || month;
    const dayLetter = dayMap[day] || day;
    const hourLetter = hourMap[hour] || hour;

    const transactionRef = `${yearLetter}${monthLetter}${dayLetter}${hourLetter}${minute}${randomNum}`;

    return transactionRef.toUpperCase();
    }