railpage/railpagecore

<?php

/**
 * Show events in a given month
 * @since Version 3.9.1
 * @package Railpage
 * @author Michael Greenhill
 */

namespace Railpage\Events;

use Railpage\AppCore;
use Railpage\Url;
use Railpage\Module;
use DateTime;
use DateTimeZone;
use Railpage\Organisations\Organisation;
use Exception;
use InvalidArgumentException;

/**
 * Month
 */

class Month extends AppCore {
    
    /**
     * Month
     * @since Version 3.9.1
     * @var int $month
     */
    
    public $month; 
    
    /**
     * Month name
     * @since Version 3.9.1
     * @var string $name
     */
    
    public $name;
    
    /**
     * Year
     * @since Version 3.9.1
     * @var int $year
     */
    
    public $year;
    
    /**
     * Constructor
     * @since Version 3.9.1
     * @param int $year
     * @param int $month
     */
    
    public function __construct($year = null, $month = null) {
        
        if ($month == null) {
            throw new InvalidArgumentException("Parameter \$year cannot be null"); 
        }
        
        if ($month == null) {
            throw new InvalidArgumentException("Parameter \$month cannot be null"); 
        }
        
        parent::__construct();
        
        $this->month = $month;
        $this->year = $year;
        
        // What is the first day of the month in question?
        $firstDayOfMonth = mktime(0, 0, 0, $this->month, 1, $this->year);
        
        // How many days does this month contain?
        //$numberDays = date('t', $firstDayOfMonth);
        
        // Retrieve some information about the first day of the month in question
        $dateComponents = getdate($firstDayOfMonth);
        
        // What is the name of the month in question?
        $this->name = $dateComponents['month'];
        
        $this->url = new Url(sprintf("/events?year=%d&month=%d", $this->year, $this->month));
    }
    
    /**
     * Get the previous month
     * @since Version 3.9.1
     * @return \Railpage\Events\Month
     */
    
    public function prev() {
        $prevmonth = $this->month - 1; 
        $prevyear = $this->year;
        
        if ($prevmonth == -1) {
            $prevmonth = 1;
            $prevyear = $this->year - 1;
        }
        
        return new Month($prevyear, $prevmonth);
    }
    
    /**
     * Get the previous month (alias)
     * @since Version 3.9.1
     * @return \Railpage\Events\Month
     */
     
    public function previous() {
        return $this->prev();
    }
    
    /**
     * Get the next month
     * @since Version 3.9.1
     * @return \Railpage\Events\Month
     */
    
    public function next() {
        $nextmonth = $this->month + 1;
        $nextyear = $this->year; 
        
        if ($nextmonth == 13) {
            $nextmonth = 1;
            $nextyear = $this->year + 1;
        }
        
        return new Month($nextyear, $nextmonth);
    }
    
    /**
     * Generate the calendar table
     * Borrowed from https://css-tricks.com/snippets/php/build-a-calendar-table/
     *
     * @since Version 3.9.1
     * @return string
     */
    
    public function generateCalendar() {
        
        /**
         * Load the Events class for later on
         */
        
        $Events = new Events;
        
        // Create array containing abbreviations of days of week.
        $daysOfWeek = array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
        
        // What is the first day of the month in question?
        $firstDayOfMonth = mktime(0, 0, 0, $this->month, 1, $this->year);
        
        // How many days does this month contain?
        $numberDays = date('t', $firstDayOfMonth);
        
        // Retrieve some information about the first day of the month in question
        $dateComponents = getdate($firstDayOfMonth);
        
        // What is the index value (0-6) of the first day of the month in question
        $dayOfWeek = $dateComponents['wday'];
        
        // Create the table tag opener and day headers
        $calendar = "<table class='calendar'>";
        //$calendar .= "<caption>" . $this->name . " " . $this->year . "</caption>";
        $calendar .= "<thead><tr>";
        
        // Create the calendar headers
        foreach ($daysOfWeek as $day) {
            $calendar .= "<th class='header'>" . $day . "</th>";
        }
        
        // Create the rest of the calendar
        // Initiate the day counter, starting with the 1st.
        
        $currentDay = 1;
        
        $calendar .= "</tr></thead><tbody><tr>";
        
        // The variable $dayOfWeek is used to
        // ensure that the calendar
        // display consists of exactly 7 columns.
        
        if ($dayOfWeek > 0) { 
            for ($i = 0; $i < $dayOfWeek; $i++) {
                $calendar .= "<td class='notday'>&nbsp;</td>";
            }
        }
        
        $month = str_pad($this->month, 2, "0", STR_PAD_LEFT);
        
        while ($currentDay <= $numberDays) {
            // Seventh column (Saturday) reached. Start a new row.
            
            if ($dayOfWeek == 7) {
                $dayOfWeek = 0;
                $calendar .= "</tr><tr>";
            }
            
            $currentDayRel = str_pad($currentDay, 2, "0", STR_PAD_LEFT);
            
            $date = sprintf("%s-%s-%s", $this->year, $month, $currentDayRel);
            
            $calendar .= sprintf("<td class='isday %s' valign='top' rel='%s'>", $date == date("Y-m-d") ? "today" : "", $date);
            $calendar .= sprintf("<span class='daynum'>%d</span>", $currentDay);
            
            /**
             * Get events on this date
             */
            
            foreach ($Events->getEventsForDate(new DateTime($date)) as $row) {
                $calendar .= sprintf("<a class='event-link' href='%s'><time datetime='%s'>%s</time></a>", $row['url'], (new DateTime($row['date'] . " " . $row['start']))->format(DATE_ISO8601), $row['title']);
            }
            
            
            $calendar .= "</td>";
            
            // Increment counters
            
            $currentDay++;
            $dayOfWeek++;
        }
        
        
        
        // Complete the row of the last week in month, if necessary
        
        if ($dayOfWeek != 7) { 
            $remainingDays = 7 - $dayOfWeek;
            
            for ($i = 0; $i < $remainingDays; $i++) {
                $calendar .= "<td class='notday'>&nbsp;</td>";
            }
        }
        
        $calendar .= "</tr></tbody>";
        $calendar .= "</table>";
        
        return $calendar;
    }
}