
<?php

class SD_Date {
    var $day;
    var $month;
    var $year;    

    function set_date($day, $month, $year) {
        $this->day   = $day;
        $this->month = $month;
        $this->year  = $year;
    }

    function get_day()   { return $this->day; }
    function get_month() { return $this->month; }
    function get_year()  { return $this->year; }

    function set_day($day)     { $this->day = $day; }
    function set_month($month) { $this->month = $month; }
    function set_year($year)   { $this->year = $year; }

    function set_mysql_date($mdate) {
        $date = $this->_parse_mysql_date($mdate);
        $this->set_date($date["day"], $date["month"], $date["year"]);
    }

    function get_mysql_date() {
        $y = $this->year;
        $m = $this->month;
        $d = $this->day;
        return "$y-$m-$d";
    }

    function today() {
        $time = localtime();
        $day   = $time[3];
        $month = $time[4] + 1;
        $year  = $time[5] + 1900;

        $date_today = new SD_Date();
        $date_today->set_date($day, $month, $year);
        return $date_today;
    }

    // compares this date with the passed in date
    // returns 0 if this == date
    //        -1 if this < date
    //         1 if this > date
    function compare($date_obj) {
        $yr_diff = ($this->get_year()  - $date_obj->get_year() );
        $mo_diff = ($this->get_month() - $date_obj->get_month()) * 100 ; 
        $dy_diff = ($this->get_day()   - $date_obj->get_day()  )      ;

        $diff = $yr_diff + $mo_diff + $dy_diff;

        if ($diff > 1) return 1;
        else if ($diff < -1) return -1;
        else return 0;
    }

    function _parse_mysql_date($mdate) {
        $datetime = split(" ", $mdate);
        $date = $datetime[0];
        $date_parts = split("-", $date);

        $year  = (int)$date_parts[0];
        $month = (int)$date_parts[1];
        $day   = (int)$date_parts[2];

        $date = array("year" => $year,
                      "month" => $month,
                      "day" => $day
                     );
        return $date;
    }
}

class SD_DateFormatter {
    var $month_names = array(1 => "January",
                             2 => "February",
                             3 => "March",
                             4 => "April",
                             5 => "May",
                             6 => "June",
                             7 => "July",
                             8 => "August",
                             9 => "September",
                             10 => "October",
                             11 => "November",
                             12 => "December"
                            );

    var $num_suffix = array(1 => "st.", 2 => "nd.", 3 => "rd.", 4 => "th.", 5 => "th.",
                            6 => "th.", 7 => "th.", 8 => "th.", 9 => "th.", 10 => "th.",
                            11 => "th.", 12 => "th.", 13 => "th.", 14 => "th.", 15 => "th.",
                            16 => "th.", 17 => "th.", 18 => "th.", 19 => "th.", 20 => "th.",
                            21 => "st.", 22 => "nd.", 23 => "rd.", 24 => "th.", 25 => "th.",
                            26 => "th.", 27 => "th.", 28 => "th.", 29 => "th.", 30 => "th.",
                            31 => "st.", 32 => "nd."
                           );
 
    var $month_abbrevs = array(1 => "Jan", 2 => "Feb", 3 => "Mar", 4 => "Apr", 
                               5 => "May", 6 => "Jun", 7 => "Jul", 8 => "Aug", 
                               9 => "Sep", 10 => "Oct", 11 => "Nov", 12 => "Dec"
                              );

    var $month_nums;
    var $day_nums;
    var $year_nums;

    function SD_DateFormatter() {
        $this->month_nums = range(1, 12);
        $this->day_nums = range(1, 31);

        $date = new SD_Date();
        $today = $date->today();
        $year = $today->get_year();

        $this->year_nums = range($year, $year + 20);
    }

    function get_months() { return $this->month_nums; }
    function get_days() { return $this->day_nums; }
    function get_years() { return $this->year_nums; }
    function get_month_abbrevs() { return array_values($this->month_abbrevs); }
    function get_month_names() { return array_values($this->month_names); }

    function fmtlong($date_obj) {
        $year  = $date_obj->get_year();
        $day   = $date_obj->get_day();
        $month = $date_obj->get_month();

        $month_name = $this->month_names[$month];
        $suffix = $this->num_suffix[$day];

        return "$month_name $day$suffix, $year";
    }
}

?>