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<?php
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/**
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* Calendar Library
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*
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* @author Zhou Yuan <yuanzhou19@gmail.com>
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* @link http://www.infopotato.com/
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* @copyright Copyright © 2009-2011 Zhou Yuan
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* @license http://www.opensource.org/licenses/mit-license.php MIT Licence
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*/
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class Calendar_Library {
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/**
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* Calendar message
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*
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* @var string
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*/
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protected $show = array();
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/**
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* A Unix timestamp corresponding to the current time.
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*
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* @var string
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*/
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protected $local_time;
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/**
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* A string containing your calendar template.
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*
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* @var string
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*/
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protected $template = '';
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/**
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* Sets the day of the week the calendar should start on.
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*
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* @var string
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*/
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protected $start_day = 'sunday';
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/**
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* Determines what version of the month name to use in the header.
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* long = January, short = Jan.
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*
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* @var string
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*/
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protected $month_type = 'long';
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/**
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* Determines what version of the weekday names to use in the column headers.
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* long = Sunday, short = Sun, abr = Su.
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*
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* @var string
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*/
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protected $day_type = 'abr';
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/**
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* SDetermines whether to display links allowing you to toggle to next/previous months.
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*
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* @var boolean
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*/
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protected $show_next_prev = FALSE;
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/**
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* Sets the basepath used in the next/previous calendar links.
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*
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* @var string
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*/
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protected $next_prev_url = '';
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/**
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* Set the calendar message and sets the default time reference
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*/
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public function __construct(array $config = NULL) {
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$this->show = array(
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'cal_su' => 'Su',
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'cal_mo' => 'Mo',
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'cal_tu' => 'Tu',
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'cal_we' => 'We',
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'cal_th' => 'Th',
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'cal_fr' => 'Fr',
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'cal_sa' => 'Sa',
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'cal_sun' => 'Sun',
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'cal_mon' => 'Mon',
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'cal_tue' => 'Tue',
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'cal_wed' => 'Wed',
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'cal_thu' => 'Thu',
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'cal_fri' => 'Fri',
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'cal_sat' => 'Sat',
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'cal_sunday' => 'Sunday',
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'cal_monday' => 'Monday',
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'cal_tuesday' => 'Tuesday',
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'cal_wednesday' => 'Wednesday',
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'cal_thursday' => 'Thursday',
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'cal_friday' => 'Friday',
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'cal_saturday'=> 'Saturday',
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'cal_jan' => 'Jan',
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'cal_feb' => 'Feb',
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'cal_mar' => 'Mar',
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'cal_apr' => 'Apr',
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'cal_may' => 'May',
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'cal_jun' => 'Jun',
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'cal_jul' => 'Jul',
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'cal_aug' => 'Aug',
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'cal_sep' => 'Sep',
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'cal_oct' => 'Oct',
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'cal_nov' => 'Nov',
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'cal_dec' => 'Dec',
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'cal_january' => 'January',
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'cal_february' => 'February',
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'cal_march' => 'March',
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'cal_april' => 'April',
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'cal_mayl' => 'May',
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'cal_june' => 'June',
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'cal_july' => 'July',
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'cal_august' => 'August',
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'cal_september' => 'September',
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'cal_october' => 'October',
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'cal_november' => 'November',
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'cal_december' => 'December',
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);
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$this->local_time = time();
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if (count($config) > 0) {
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foreach ($config as $key => $val) {
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if (isset($key)) {
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$this->$key = $val;
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}
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}
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}
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}
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/**
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* Generate the calendar
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*
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* @param integer the year
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* @param integer the month
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* @param array the data to be shown in the calendar cells
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* @return string
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*/
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public function generate($year = '', $month = '', array $data = NULL) {
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// Set and validate the supplied month/year
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if ($year == '') {
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$year = date('Y', $this->local_time);
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}
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if ($month == '') {
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$month = date('m', $this->local_time);
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}
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if (strlen($year) == 1) {
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$year = '200'.$year;
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}
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if (strlen($year) == 2) {
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$year = '20'.$year;
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}
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if (strlen($month) == 1) {
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$month = '0'.$month;
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}
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$adjusted_date = $this->adjust_date($month, $year);
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$month = $adjusted_date['month'];
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$year = $adjusted_date['year'];
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// Determine the total days in the month
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$total_days = $this->get_total_days($month, $year);
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// Set the starting day of the week
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$start_days = array('sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday' => 3, 'thursday' => 4, 'friday' => 5, 'saturday' => 6);
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$start_day = ( ! isset($start_days[$this->start_day])) ? 0 : $start_days[$this->start_day];
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// Set the starting day number
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$local_date = mktime(12, 0, 0, $month, 1, $year);
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$date = getdate($local_date);
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$day = $start_day + 1 - $date["wday"];
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while ($day > 1) {
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$day -= 7;
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}
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// Set the current month/year/day
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// We use this to determine the "today" date
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$cur_year = date("Y", $this->local_time);
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$cur_month = date("m", $this->local_time);
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$cur_day = date("j", $this->local_time);
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$is_current_month = ($cur_year == $year && $cur_month == $month) ? TRUE : FALSE;
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// Generate the template data array
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$this->parse_template();
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// Begin building the calendar output
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$out = $this->temp['table_open'];
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$out .= "\n";
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$out .= "\n";
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$out .= $this->temp['heading_row_start'];
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$out .= "\n";
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// "previous" month link
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if ($this->show_next_prev == TRUE) {
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// Add a trailing slash to the URL if needed
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$this->next_prev_url = preg_replace("/(.+?)\/*$/", "\\1/", $this->next_prev_url);
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$adjusted_date = $this->adjust_date($month - 1, $year);
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$out .= str_replace('{previous_url}', $this->next_prev_url.$adjusted_date['year'].'/'.$adjusted_date['month'], $this->temp['heading_previous_cell']);
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$out .= "\n";
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}
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// Heading containing the month/year
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$colspan = ($this->show_next_prev == TRUE) ? 5 : 7;
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$this->temp['heading_title_cell'] = str_replace('{colspan}', $colspan, $this->temp['heading_title_cell']);
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$this->temp['heading_title_cell'] = str_replace('{heading}', $this->get_month_name($month)." ".$year, $this->temp['heading_title_cell']);
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$out .= $this->temp['heading_title_cell'];
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$out .= "\n";
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// "next" month link
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if ($this->show_next_prev == TRUE) {
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$adjusted_date = $this->adjust_date($month + 1, $year);
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$out .= str_replace('{next_url}', $this->next_prev_url.$adjusted_date['year'].'/'.$adjusted_date['month'], $this->temp['heading_next_cell']);
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}
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$out .= "\n";
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$out .= $this->temp['heading_row_end'];
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$out .= "\n";
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// Write the cells containing the days of the week
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$out .= "\n";
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$out .= $this->temp['week_row_start'];
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$out .= "\n";
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$day_names = $this->get_day_names();
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for ($i = 0; $i < 7; $i ++) {
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$out .= str_replace('{week_day}', $day_names[($start_day + $i) %7], $this->temp['week_day_cell']);
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}
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$out .= "\n";
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$out .= $this->temp['week_row_end'];
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$out .= "\n";
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// Build the main body of the calendar
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while ($day <= $total_days) {
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$out .= "\n";
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$out .= $this->temp['cal_row_start'];
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$out .= "\n";
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for ($i = 0; $i < 7; $i++) {
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$out .= ($is_current_month == TRUE && $day == $cur_day) ? $this->temp['cal_cell_start_today'] : $this->temp['cal_cell_start'];
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if ($day > 0 && $day <= $total_days) {
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if (isset($data[$day])) {
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// Cells with content
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$temp = ($is_current_month == TRUE && $day == $cur_day) ? $this->temp['cal_cell_content_today'] : $this->temp['cal_cell_content'];
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$out .= str_replace('{day}', $day, str_replace('{content}', $data[$day], $temp));
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} else {
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// Cells with no content
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$temp = ($is_current_month == TRUE && $day == $cur_day) ? $this->temp['cal_cell_no_content_today'] : $this->temp['cal_cell_no_content'];
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$out .= str_replace('{day}', $day, $temp);
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}
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} else {
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// Blank cells
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$out .= $this->temp['cal_cell_blank'];
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}
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$out .= ($is_current_month == TRUE && $day == $cur_day) ? $this->temp['cal_cell_end_today'] : $this->temp['cal_cell_end'];
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$day++;
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}
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$out .= "\n";
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$out .= $this->temp['cal_row_end'];
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$out .= "\n";
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}
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$out .= "\n";
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$out .= $this->temp['table_close'];
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return $out;
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}
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/**
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* Get Month Name
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*
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* Generates a textual month name based on the numeric
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* month provided.
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*
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* @param integer the month
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* @return string
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*/
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public function get_month_name($month) {
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if ($this->month_type == 'short') {
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$month_names = array('01' => 'cal_jan', '02' => 'cal_feb', '03' => 'cal_mar', '04' => 'cal_apr', '05' => 'cal_may', '06' => 'cal_jun', '07' => 'cal_jul', '08' => 'cal_aug', '09' => 'cal_sep', '10' => 'cal_oct', '11' => 'cal_nov', '12' => 'cal_dec');
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} else {
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$month_names = array('01' => 'cal_january', '02' => 'cal_february', '03' => 'cal_march', '04' => 'cal_april', '05' => 'cal_mayl', '06' => 'cal_june', '07' => 'cal_july', '08' => 'cal_august', '09' => 'cal_september', '10' => 'cal_october', '11' => 'cal_november', '12' => 'cal_december');
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}
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$month = $month_names[$month];
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if ($this->show[$month] === FALSE) {
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return ucfirst(str_replace('cal_', '', $month));
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}
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return $this->show[$month];
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}
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/**
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* Get Day Names
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*
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* Returns an array of day names (Sunday, Monday, etc.) based
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* on the type. Options: long, short, abrev
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*
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* @param string
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* @return array
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*/
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public function get_day_names($day_type = '') {
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if ($day_type != '') {
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$this->day_type = $day_type;
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}
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if ($this->day_type == 'long') {
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$day_names = array('sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday');
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} elseif ($this->day_type == 'short') {
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$day_names = array('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat');
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} else {
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$day_names = array('su', 'mo', 'tu', 'we', 'th', 'fr', 'sa');
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}
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$days = array();
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foreach ($day_names as $val) {
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$days[] = ($this->show['cal_'.$val] === FALSE) ? ucfirst($val) : $this->show['cal_'.$val];
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}
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return $days;
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}
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/**
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* Adjust Date
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*
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* This function makes sure that we have a valid month/year.
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* For example, if you submit 13 as the month, the year will
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* increment and the month will become January.
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*
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* @param integer the month
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* @param integer the year
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* @return array
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*/
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public function adjust_date($month, $year) {
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$date = array();
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$date['month'] = $month;
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$date['year'] = $year;
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while ($date['month'] > 12) {
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$date['month'] -= 12;
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$date['year']++;
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}
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while ($date['month'] <= 0) {
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$date['month'] += 12;
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$date['year']--;
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}
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if (strlen($date['month']) == 1) {
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$date['month'] = '0'.$date['month'];
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}
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return $date;
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}
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/**
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* Total days in a given month
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*
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* @param integer the month
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* @param integer the year
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* @return integer
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*/
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public function get_total_days($month, $year) {
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$days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
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if ($month < 1 || $month > 12) {
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return 0;
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}
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// Is the year a leap year?
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if ($month == 2) {
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if ($year % 400 == 0 || ($year % 4 == 0 && $year % 100 != 0)) {
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return 29;
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}
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}
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return $days_in_month[$month - 1];
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}
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/**
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* Set Default Template Data
400
*
401
* This is used in the event that the user has not created their own template
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*
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* @return array
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*/
405
public function default_template() {
406
return array (
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'table_open' => '<table border="0" cellpadding="0" cellspacing="0">',
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'heading_row_start' => '<tr>',
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'heading_previous_cell' => '<th><a href="{previous_url}"><<</a></th>',
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'heading_title_cell' => '<th colspan="{colspan}">{heading}</th>',
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'heading_next_cell' => '<th><a href="{next_url}">>></a></th>',
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'heading_row_end' => '</tr>',
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'week_row_start' => '<tr>',
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'week_day_cell' => '<td>{week_day}</td>',
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'week_row_end' => '</tr>',
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'cal_row_start' => '<tr>',
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'cal_cell_start' => '<td>',
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'cal_cell_start_today' => '<td>',
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'cal_cell_content' => '<a href="{content}">{day}</a>',
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'cal_cell_content_today' => '<a href="{content}"><strong>{day}</strong></a>',
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'cal_cell_no_content' => '{day}',
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'cal_cell_no_content_today' => '<strong>{day}</strong>',
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'cal_cell_blank' => ' ',
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'cal_cell_end' => '</td>',
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'cal_cell_end_today' => '</td>',
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'cal_row_end' => '</tr>',
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'table_close' => '</table>'
428
);
429
}
430
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/**
432
* Parse Template
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*
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* Harvests the data within the template {pseudo-variables}
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* used to display the calendar
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*
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* @return void
438
*/
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public function parse_template() {
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$this->temp = $this->default_template();
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if ($this->template == '') {
443
return;
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}
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$today = array('cal_cell_start_today', 'cal_cell_content_today', 'cal_cell_no_content_today', 'cal_cell_end_today');
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foreach (array('table_open', 'table_close', 'heading_row_start', 'heading_previous_cell', 'heading_title_cell', 'heading_next_cell', 'heading_row_end', 'week_row_start', 'week_day_cell', 'week_row_end', 'cal_row_start', 'cal_cell_start', 'cal_cell_content', 'cal_cell_no_content', 'cal_cell_blank', 'cal_cell_end', 'cal_row_end', 'cal_cell_start_today', 'cal_cell_content_today', 'cal_cell_no_content_today', 'cal_cell_end_today') as $val) {
449
if (preg_match("/\{".$val."\}(.*?)\{\/".$val."\}/si", $this->template, $match)) {
450
$this->temp[$val] = $match['1'];
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} else {
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if (in_array($val, $today, TRUE)) {
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$this->temp[$val] = $this->temp[str_replace('_today', '', $val)];
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}
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}
456
}
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}
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}
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/* End of file: ./system/libraries/calendar/calendar_library.php */
Page URI: http://www.infopotato.com/index.php/code/library/calendar/