self/common/src/utils/majority.ts

export function getAdjustedTimestampBytes(y: number = 0, m: number = 0, d: number = 0): number[] {
    // Get the current date/time
    let currentDate: Date = new Date();

    // Optionally adjust the date
    if (y !== 0) currentDate.setFullYear(currentDate.getFullYear() + y);
    if (m !== 0) currentDate.setMonth(currentDate.getMonth() + m);
    if (d !== 0) currentDate.setDate(currentDate.getDate() + d);

    // Get the Unix timestamp (in seconds)
    const timestamp: number = Math.floor(currentDate.getTime() / 1000);

    // Convert the timestamp to 4 bytes
    const bytes: number[] = [
        (timestamp >> 24) & 0xFF,
        (timestamp >> 16) & 0xFF,
        (timestamp >> 8) & 0xFF,
        timestamp & 0xFF,
    ];

    return bytes;
}
export function getTimestampBytesFromYearFraction(yearFraction: number): number[] {
    // Separate the year and the fractional part
    const year = Math.floor(yearFraction);
    const fraction = yearFraction - year;

    // Convert the fractional part into months (0-11)
    const monthsFromFraction = Math.floor(fraction * 12);

    // Create a date object from the year and the calculated month
    // Assuming the first day of the month for simplicity
    const date = new Date(year, monthsFromFraction, 1);

    // Get the Unix timestamp (in seconds)
    const timestamp: number = Math.floor(date.getTime() / 1000);

    // Convert the timestamp to 4 bytes
    const bytes: number[] = [

        (timestamp >> 24) & 0xFF,
        (timestamp >> 16) & 0xFF,
        (timestamp >> 8) & 0xFF,
        timestamp & 0xFF,
    ];

    return bytes;
}


export function unixTimestampToYYMMDD(timestamp: number): string {
    console.log("timestamp: " + timestamp);
    const date = new Date(timestamp * 1000);
    console.log("date: " + date);
    const year = date.getUTCFullYear();
    console.log("year: " + year);
    const month = date.getUTCMonth() + 1;
    const day = date.getUTCDate();

    // Ensure the year is correctly formatted as two digits
    const YY = (`0${year % 100}`).slice(-2);
    const MM = (`0${month}`).slice(-2);
    const DD = (`0${day}`).slice(-2);

    return `${YY}${MM}${DD}`;
}

export function yearFractionToYYMMDD(yearFraction: number): string {
    // Separate the year and the fractional part
    const year = yearFraction;
    const fraction = yearFraction - Math.floor(yearFraction);

    // Convert the fractional part into months (0-11)
    const monthsFromFraction = Math.floor(fraction * 12);

    // Assuming the first day of the month for simplicity
    const day = 1;

    // Format year, month, and day into YYMMDD string
    const YY = (`0${Math.floor(year) % 100}`).slice(-2);
    const MM = (`0${monthsFromFraction + 1}`).slice(-2); // +1 because months are 1-indexed in this format
    const DD = (`0${day}`).slice(-2);

    return `${YY}${MM}${DD}`;
}

export function yymmddToByteArray(yymmdd: string): number[] {
    // Convert each character in the string to its ASCII value
    const byteArray = Array.from(yymmdd).map(char => char.charCodeAt(0));
    return byteArray;
}