Gazelle/classes/calendarview.class.php

<?php

class CalendarView
{
    private static $Days = array('S', 'M', 'T', 'W', 'T', 'F', 'S');
    private static $Headings = array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
    private static $Events;

    public static function render_title($Month, $Year)
    {
        if (!is_numeric($Month) || !is_numeric($Year)) {
            error(404);
        }
        $NextMonth = $Month % 12 == 0 ? 1 : $Month + 1;
        $PreviousMonth = $Month == 1 ? 12 : $Month - 1;
        $NextYear = $Year;
        if ($NextMonth == 1) {
            $NextYear++;
        }
        $PreviousYear = $Year;
        if ($PreviousMonth == 12) {
            $PreviousYear--;
        } ?>
    <h1 class="center">
      <a href="tools.php?action=calendar&amp;month=<?=$PreviousMonth?>&amp;year=<?=$PreviousYear?>">&lt;</a>
        <?=date("F", mktime(0, 0, 0, $Month, 10)) . " $Year"?>
      <a href="tools.php?action=calendar&amp;month=<?=$NextMonth?>&amp;year=<?=$NextYear?>">&gt;</a>
    </h1>
    <input type="hidden" id="month" value="<?=$Month?>" />
    <input type="hidden" id="year" value="<?=$Year?>" />
        <?php
    }

    private static function get_events_on($Day, $Events)
    {
        // Linear search, Lol.
        $Results = [];
        foreach ($Events as $Event) {
            if ($Event['StartDay'] == $Day || ($Event['StartDay'] <= $Day && $Event['EndDay'] >= $Day)) {
                $Results[] = $Event;
            }
        }
        return $Results;
    }


    private static function render_events_day($Day, $Events)
    {
        $Events = self::get_events_on($Day, $Events);
        foreach ($Events as $Event) {
            $Color = Calendar::$Colors[Calendar::$Importances[$Event['Importance']]];
            $Category = Calendar::$Categories[$Event['Category']];
            $Tooltip = $Event['Title'] . " - " . Calendar::$Categories[$Event['Category']] . " - " . Calendar::$Importances[$Event['Importance']]; ?>
      <p><a href="#" class="event_day tooltip" title="<?=$Tooltip?>" data-gazelle-id="<?=$Event['ID']?>" style="color: <?=$Color?>;"><?=Format::cut_string($Event['Title'], 8, true)?></a></p>
            <?php
        }
    }

    public static function render_calendar($Month, $Year, $Events)
    {
        $RunningDay = date('w', mktime(0, 0, 0, $Month, 1, $Year));
        $DaysInMonth = date('t', mktime(0, 0, 0, $Month, 1, $Year));
        $DaysThisWeek = 1;
        $DayCounter = 0;
        $DatesArray = []; ?>

    <table class="calendar">
      <tr>
        <?php    foreach (self::$Headings as $Heading) { ?>
        <td class="calendar-row calendar-heading">
          <strong><?=$Heading?></strong>
        </td>
        <?php    } ?>
      </tr>
      <tr class="calendar-row">

        <?php    for ($x = 0; $x < $RunningDay; $x++) { ?>
        <td class="calendar-day-np"></td>
            <?php
              $DaysThisWeek++;
        }

        for ($i = 1; $i <= $DaysInMonth; $i++) {
            ?>
        <td class="calendar-day">
          <div class="day-events">
            <?php            self::render_events_day($i, $Events); ?>
          </div>
          <div class="day-number">
            <?=$i?>
          </div>
        </td>
            <?php      if ($RunningDay == 6) { ?>
      </tr>
                <?php        if (($DayCounter + 1) != $DaysInMonth) { ?>
      <tr class="calendar-row">
                    <?php
                }
                    $RunningDay = -1;
                    $DaysThisWeek = 0;
            }
            $DaysThisWeek++;
            $RunningDay++;
            $DayCounter++;
        }

        if ($DaysThisWeek < 8) {
            for ($x = 1; $x <= (8 - $DaysThisWeek); $x++) {
                ?>
        <td class="calendar-day-np"></td>
                <?php
            }
        } ?>
      </tr>

    </table>
        <?php
        echo $Calendar;
    }
}