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Differences Between: [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  namespace core_calendar;
  18  
  19  /**
  20   * Defines functions used by calendar type plugins.
  21   *
  22   * This library provides a unified interface for calendar types.
  23   *
  24   * @package core_calendar
  25   * @copyright 2008 onwards Foodle Group {@link http://foodle.org}
  26   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  27   */
  28  abstract class type_base {
  29  
  30      /**
  31       * Returns the name of the calendar.
  32       *
  33       * This is the non-translated name, usually just
  34       * the name of the calendar folder.
  35       *
  36       * @return string the calendar name
  37       */
  38      public abstract function get_name();
  39  
  40      /**
  41       * Returns a list of all the possible days for all months.
  42       *
  43       * This is used to generate the select box for the days
  44       * in the date selector elements. Some months contain more days
  45       * than others so this function should return all possible days as
  46       * we can not predict what month will be chosen (the user
  47       * may have JS turned off and we need to support this situation in
  48       * Moodle).
  49       *
  50       * @return array the days
  51       */
  52      public abstract function get_days();
  53  
  54      /**
  55       * Returns a list of all the names of the months.
  56       *
  57       * @return array the month names
  58       */
  59      public abstract function get_months();
  60  
  61      /**
  62       * Returns the minimum year for the calendar.
  63       *
  64       * @return int The minimum year
  65       */
  66      public abstract function get_min_year();
  67  
  68      /**
  69       * Returns the maximum year for the calendar
  70       *
  71       * @return int The maximum year
  72       */
  73      public abstract function get_max_year();
  74  
  75      /**
  76       * Returns an array of years.
  77       *
  78       * @param int $minyear
  79       * @param int $maxyear
  80       * @return array the years
  81       */
  82      public abstract function get_years($minyear = null, $maxyear = null);
  83  
  84      /**
  85       * Returns a multidimensional array with information for day, month, year
  86       * and the order they are displayed when selecting a date.
  87       * The order in the array will be the order displayed when selecting a date.
  88       * Override this function to change the date selector order.
  89       *
  90       * @param int $minyear The year to start with
  91       * @param int $maxyear The year to finish with
  92       * @return array Full date information
  93       */
  94      public abstract function get_date_order($minyear = null, $maxyear = null);
  95  
  96      /**
  97       * Returns the number of days in a week.
  98       *
  99       * @return int the number of days
 100       */
 101      public abstract function get_num_weekdays();
 102  
 103      /**
 104       * Returns an indexed list of all the names of the weekdays.
 105       *
 106       * The list starts with the index 0. Each index, representing a
 107       * day, must be an array that contains the indexes 'shortname'
 108       * and 'fullname'.
 109       *
 110       * @return array array of days
 111       */
 112      public abstract function get_weekdays();
 113  
 114      /**
 115       * Returns the index of the starting week day.
 116       *
 117       * This may vary, for example in the Gregorian calendar, some may consider Monday
 118       * as the start of the week, where as others may consider Sunday the start.
 119       *
 120       * @return int
 121       */
 122      public abstract function get_starting_weekday();
 123  
 124      /**
 125       * Returns the index of the weekday for a specific calendar date.
 126       *
 127       * @param int $year
 128       * @param int $month
 129       * @param int $day
 130       * @return int
 131       */
 132      public abstract function get_weekday($year, $month, $day);
 133  
 134      /**
 135       * Returns the number of days in a given month.
 136       *
 137       *
 138       * @param int $year
 139       * @param int $month
 140       * @return int the number of days
 141       */
 142      public abstract function get_num_days_in_month($year, $month);
 143  
 144      /**
 145       * Get the previous month.
 146       *
 147       * @param int $year
 148       * @param int $month
 149       * @return array previous month and year
 150       */
 151      public abstract function get_prev_month($year, $month);
 152  
 153      /**
 154       * Get the next month.
 155       *
 156       * @param int $year
 157       * @param int $month
 158       * @return array the following month and year
 159       */
 160      public abstract function get_next_month($year, $month);
 161  
 162      /**
 163       * Returns a formatted string that represents a date in user time.
 164       *
 165       * @param int $time the timestamp in UTC, as obtained from the database
 166       * @param string $format strftime format
 167       * @param int|float|string $timezone the timezone to use
 168       *        {@link http://docs.moodle.org/dev/Time_API#Timezone}
 169       * @param bool $fixday if true then the leading zero from %d is removed,
 170       *        if false then the leading zero is maintained
 171       * @param bool $fixhour if true then the leading zero from %I is removed,
 172       *        if false then the leading zero is maintained
 173       * @return string the formatted date/time
 174       */
 175      public abstract function timestamp_to_date_string($time, $format, $timezone, $fixday, $fixhour);
 176  
 177      /**
 178       * Given a $time timestamp in GMT (seconds since epoch), returns an array that represents
 179       * the date in user time.
 180       *
 181       * @param int $time timestamp in GMT
 182       * @param float|int|string $timezone the timezone to use to calculate the time
 183       *        {@link http://docs.moodle.org/dev/Time_API#Timezone}
 184       * @return array an array that represents the date in user time
 185       */
 186      public abstract function timestamp_to_date_array($time, $timezone = 99);
 187  
 188      /**
 189       * Provided with a day, month, year, hour and minute in the specific
 190       * calendar type convert it into the equivalent Gregorian date.
 191       *
 192       * @param int $year
 193       * @param int $month
 194       * @param int $day
 195       * @param int $hour
 196       * @param int $minute
 197       * @return array the converted date
 198       */
 199      public abstract function convert_to_gregorian($year, $month, $day, $hour = 0, $minute = 0);
 200  
 201      /**
 202       * Provided with a day, month, year, hour and minute in a Gregorian date
 203       * convert it into the specific calendar type date.
 204       *
 205       * @param int $year
 206       * @param int $month
 207       * @param int $day
 208       * @param int $hour
 209       * @param int $minute
 210       * @return array the converted date
 211       */
 212      public abstract function convert_from_gregorian($year, $month, $day, $hour = 0, $minute = 0);
 213  
 214      /**
 215       * This return locale for windows os.
 216       *
 217       * @return string locale
 218       */
 219      public abstract function locale_win_charset();
 220  
 221      /**
 222       * Provided with a day, month, year, hour and minute in the specific
 223       * calendar type convert it into the equivalent Unix Time Stamp.
 224       *
 225       * @param int $year
 226       * @param int $month
 227       * @param int $day
 228       * @param int $hour
 229       * @param int $minute
 230       * @return int timestamp
 231       */
 232      public function convert_to_timestamp($year, $month, $day, $hour = 0, $minute = 0) {
 233          $gregorianinfo = $this->convert_to_gregorian($year, $month, $day, $hour, $minute);
 234          return make_timestamp(
 235              $gregorianinfo['year'],
 236              $gregorianinfo['month'],
 237              $gregorianinfo['day'],
 238              $gregorianinfo['hour'],
 239              $gregorianinfo['minute'],
 240              0);
 241      }
 242  
 243      /**
 244       * Get the previous day.
 245       *
 246       * @param int $daytimestamp The day timestamp.
 247       * @return int previous day timestamp
 248       */
 249      public function get_prev_day($daytimestamp) {
 250          $date = new \DateTime();
 251          $date->setTimestamp($daytimestamp);
 252          $date->modify('-1 day');
 253  
 254          return $date->getTimestamp();
 255      }
 256  
 257      /**
 258       * Get the next day.
 259       *
 260       * @param int $daytimestamp The day timestamp.
 261       * @return int the following day
 262       */
 263      public function get_next_day($daytimestamp) {
 264          $date = new \DateTime();
 265          $date->setTimestamp($daytimestamp);
 266          $date->modify('+1 day');
 267  
 268          return $date->getTimestamp();
 269      }
 270  }