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<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 1.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* CodeIgniter Calendar Class
*
* This class enables the creation of calendars
*
* @package CodeIgniter
* @subpackage Libraries
* @category Libraries
* @author EllisLab Dev Team
* @link https://codeigniter.com/user_guide/libraries/calendar.html
*/
class CI_Calendar {
/**
* Calendar layout template
*
* @var mixed
*/
public $template = '';
/**
* Replacements array for template
*
* @var array
*/
public $replacements = array();
/**
* Day of the week to start the calendar on
*
* @var string
*/
public $start_day = 'sunday';
/**
* How to display months
*
* @var string
*/
public $month_type = 'long';
/**
* How to display names of days
*
* @var string
*/
public $day_type = 'abr';
/**
* Whether to show next/prev month links
*
* @var bool
*/
public $show_next_prev = FALSE;
/**
* Url base to use for next/prev month links
*
* @var bool
*/
public $next_prev_url = '';
/**
* Show days of other months
*
* @var bool
*/
public $show_other_days = FALSE;
// --------------------------------------------------------------------
/**
* CI Singleton
*
* @var object
*/
protected $CI;
// --------------------------------------------------------------------
/**
* Class constructor
*
* Loads the calendar language file and sets the default time reference.
*
* @uses CI_Lang::$is_loaded
*
* @param array $config Calendar options
* @return void
*/
public function __construct($config = array())
{
$this->CI =& get_instance();
$this->CI->lang->load('calendar');
empty($config) OR $this->initialize($config);
log_message('info', 'Calendar Class Initialized');
}
// --------------------------------------------------------------------
/**
* Initialize the user preferences
*
* Accepts an associative array as input, containing display preferences
*
* @param array config preferences
* @return CI_Calendar
*/
public function initialize($config = array())
{
foreach ($config as $key => $val)
{
if (isset($this->$key))
{
$this->$key = $val;
}
}
// Set the next_prev_url to the controller if required but not defined
if ($this->show_next_prev === TRUE && empty($this->next_prev_url))
{
$this->next_prev_url = $this->CI->config->site_url($this->CI->router->class.'/'.$this->CI->router->method);
}
return $this;
}
// --------------------------------------------------------------------
/**
* Generate the calendar
*
* @param int the year
* @param int the month
* @param array the data to be shown in the calendar cells
* @return string
*/
public function generate($year = '', $month = '', $data = array())
{
$local_time = time();
// Set and validate the supplied month/year
if (empty($year))
{
$year = date('Y', $local_time);
}
elseif (strlen($year) === 1)
{
$year = '200'.$year;
}
elseif (strlen($year) === 2)
{
$year = '20'.$year;
}
if (empty($month))
{
$month = date('m', $local_time);
}
elseif (strlen($month) === 1)
{
$month = '0'.$month;
}
$adjusted_date = $this->adjust_date($month, $year);
$month = $adjusted_date['month'];
$year = $adjusted_date['year'];
// Determine the total days in the month
$total_days = $this->get_total_days($month, $year);
// Set the starting day of the week
$start_days = array('sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday' => 3, 'thursday' => 4, 'friday' => 5, 'saturday' => 6);
$start_day = isset($start_days[$this->start_day]) ? $start_days[$this->start_day] : 0;
// Set the starting day number
$local_date = mktime(12, 0, 0, $month, 1, $year);
$date = getdate($local_date);
$day = $start_day + 1 - $date['wday'];
while ($day > 1)
{
$day -= 7;
}
// Set the current month/year/day
// We use this to determine the "today" date
$cur_year = date('Y', $local_time);
$cur_month = date('m', $local_time);
$cur_day = date('j', $local_time);
$is_current_month = ($cur_year == $year && $cur_month == $month);
// Generate the template data array
$this->parse_template();
// Begin building the calendar output
$out = $this->replacements['table_open']."\n\n".$this->replacements['heading_row_start']."\n";
// "previous" month link
if ($this->show_next_prev === TRUE)
{
// Add a trailing slash to the URL if needed
$this->next_prev_url = preg_replace('/(.+?)\/*$/', '\\1/', $this->next_prev_url);
$adjusted_date = $this->adjust_date($month - 1, $year);
$out .= str_replace('{previous_url}', $this->next_prev_url.$adjusted_date['year'].'/'.$adjusted_date['month'], $this->replacements['heading_previous_cell'])."\n";
}
// Heading containing the month/year
$colspan = ($this->show_next_prev === TRUE) ? 5 : 7;
$this->replacements['heading_title_cell'] = str_replace('{colspan}', $colspan,
str_replace('{heading}', $this->get_month_name($month).' '.$year, $this->replacements['heading_title_cell']));
$out .= $this->replacements['heading_title_cell']."\n";
// "next" month link
if ($this->show_next_prev === TRUE)
{
$adjusted_date = $this->adjust_date($month + 1, $year);
$out .= str_replace('{next_url}', $this->next_prev_url.$adjusted_date['year'].'/'.$adjusted_date['month'], $this->replacements['heading_next_cell']);
}
$out .= "\n".$this->replacements['heading_row_end']."\n\n"
// Write the cells containing the days of the week
.$this->replacements['week_row_start']."\n";
$day_names = $this->get_day_names();
for ($i = 0; $i < 7; $i ++)
{
$out .= str_replace('{week_day}', $day_names[($start_day + $i) %7], $this->replacements['week_day_cell']);
}
$out .= "\n".$this->replacements['week_row_end']."\n";
// Build the main body of the calendar
while ($day <= $total_days)
{
$out .= "\n".$this->replacements['cal_row_start']."\n";
for ($i = 0; $i < 7; $i++)
{
if ($day > 0 && $day <= $total_days)
{
$out .= ($is_current_month === TRUE && $day == $cur_day) ? $this->replacements['cal_cell_start_today'] : $this->replacements['cal_cell_start'];
if (isset($data[$day]))
{
// Cells with content
$temp = ($is_current_month === TRUE && $day == $cur_day) ?
$this->replacements['cal_cell_content_today'] : $this->replacements['cal_cell_content'];
$out .= str_replace(array('{content}', '{day}'), array($data[$day], $day), $temp);
}
else
{
// Cells with no content
$temp = ($is_current_month === TRUE && $day == $cur_day) ?
$this->replacements['cal_cell_no_content_today'] : $this->replacements['cal_cell_no_content'];
$out .= str_replace('{day}', $day, $temp);
}
$out .= ($is_current_month === TRUE && $day == $cur_day) ? $this->replacements['cal_cell_end_today'] : $this->replacements['cal_cell_end'];
}
elseif ($this->show_other_days === TRUE)
{
$out .= $this->replacements['cal_cell_start_other'];
if ($day <= 0)
{
// Day of previous month
$prev_month = $this->adjust_date($month - 1, $year);
$prev_month_days = $this->get_total_days($prev_month['month'], $prev_month['year']);
$out .= str_replace('{day}', $prev_month_days + $day, $this->replacements['cal_cell_other']);
}
else
{
// Day of next month
$out .= str_replace('{day}', $day - $total_days, $this->replacements['cal_cell_other']);
}
$out .= $this->replacements['cal_cell_end_other'];
}
else
{
// Blank cells
$out .= $this->replacements['cal_cell_start'].$this->replacements['cal_cell_blank'].$this->replacements['cal_cell_end'];
}
$day++;
}
$out .= "\n".$this->replacements['cal_row_end']."\n";
}
return $out .= "\n".$this->replacements['table_close'];
}
// --------------------------------------------------------------------
/**
* Get Month Name
*
* Generates a textual month name based on the numeric
* month provided.
*
* @param int the month
* @return string
*/
public function get_month_name($month)
{
if ($this->month_type === 'short')
{
$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');
}
else
{
$month_names = array('01' => 'cal_january', '02' => 'cal_february', '03' => 'cal_march', '04' => 'cal_april', '05' => 'cal_mayl', '06' => 'cal_june', '07' => 'cal_july', '08' => 'cal_august', '09' => 'cal_september', '10' => 'cal_october', '11' => 'cal_november', '12' => 'cal_december');
}
return ($this->CI->lang->line($month_names[$month]) === FALSE)
? ucfirst(substr($month_names[$month], 4))
: $this->CI->lang->line($month_names[$month]);
}
// --------------------------------------------------------------------
/**
* Get Day Names
*
* Returns an array of day names (Sunday, Monday, etc.) based
* on the type. Options: long, short, abr
*
* @param string
* @return array
*/
public function get_day_names($day_type = '')
{
if ($day_type !== '')
{
$this->day_type = $day_type;
}
if ($this->day_type === 'long')
{
$day_names = array('sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday');
}
elseif ($this->day_type === 'short')
{
$day_names = array('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat');
}
else
{
$day_names = array('su', 'mo', 'tu', 'we', 'th', 'fr', 'sa');
}
$days = array();
for ($i = 0, $c = count($day_names); $i < $c; $i++)
{
$days[] = ($this->CI->lang->line('cal_'.$day_names[$i]) === FALSE) ? ucfirst($day_names[$i]) : $this->CI->lang->line('cal_'.$day_names[$i]);
}
return $days;
}
// --------------------------------------------------------------------
/**
* Adjust Date
*
* This function makes sure that we have a valid month/year.
* For example, if you submit 13 as the month, the year will
* increment and the month will become January.
*
* @param int the month
* @param int the year
* @return array
*/
public function adjust_date($month, $year)
{
$date = array();
$date['month'] = $month;
$date['year'] = $year;
while ($date['month'] > 12)
{
$date['month'] -= 12;
$date['year']++;
}
while ($date['month'] <= 0)
{
$date['month'] += 12;
$date['year']--;
}
if (strlen($date['month']) === 1)
{
$date['month'] = '0'.$date['month'];
}
return $date;
}
// --------------------------------------------------------------------
/**
* Total days in a given month
*
* @param int the month
* @param int the year
* @return int
*/
public function get_total_days($month, $year)
{
$this->CI->load->helper('date');
return days_in_month($month, $year);
}
// --------------------------------------------------------------------
/**
* Set Default Template Data
*
* This is used in the event that the user has not created their own template
*
* @return array
*/
public function default_template()
{
return array(
'table_open' => '<table border="0" cellpadding="4" cellspacing="0">',
'heading_row_start' => '<tr>',
'heading_previous_cell' => '<th><a href="{previous_url}"><<</a></th>',
'heading_title_cell' => '<th colspan="{colspan}">{heading}</th>',
'heading_next_cell' => '<th><a href="{next_url}">>></a></th>',
'heading_row_end' => '</tr>',
'week_row_start' => '<tr>',
'week_day_cell' => '<td>{week_day}</td>',
'week_row_end' => '</tr>',
'cal_row_start' => '<tr>',
'cal_cell_start' => '<td>',
'cal_cell_start_today' => '<td>',
'cal_cell_start_other' => '<td style="color: #666;">',
'cal_cell_content' => '<a href="{content}">{day}</a>',
'cal_cell_content_today' => '<a href="{content}"><strong>{day}</strong></a>',
'cal_cell_no_content' => '{day}',
'cal_cell_no_content_today' => '<strong>{day}</strong>',
'cal_cell_blank' => ' ',
'cal_cell_other' => '{day}',
'cal_cell_end' => '</td>',
'cal_cell_end_today' => '</td>',
'cal_cell_end_other' => '</td>',
'cal_row_end' => '</tr>',
'table_close' => '</table>'
);
}
// --------------------------------------------------------------------
/**
* Parse Template
*
* Harvests the data within the template {pseudo-variables}
* used to display the calendar
*
* @return CI_Calendar
*/
public function parse_template()
{
$this->replacements = $this->default_template();
if (empty($this->template))
{
return $this;
}
if (is_string($this->template))
{
$today = array('cal_cell_start_today', 'cal_cell_content_today', 'cal_cell_no_content_today', 'cal_cell_end_today');
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', 'cal_cell_start_other', 'cal_cell_other', 'cal_cell_end_other') as $val)
{
if (preg_match('/\{'.$val.'\}(.*?)\{\/'.$val.'\}/si', $this->template, $match))
{
$this->replacements[$val] = $match[1];
}
elseif (in_array($val, $today, TRUE))
{
$this->replacements[$val] = $this->replacements[substr($val, 0, -6)];
}
}
}
elseif (is_array($this->template))
{
$this->replacements = array_merge($this->replacements, $this->template);
}
return $this;
}
}