ILIAS  Release_3_10_x_branch Revision 61812
 All Data Structures Namespaces Files Functions Variables Groups Pages
class.ilDatePresentation.php
Go to the documentation of this file.
1 <?php
2 /*
3  +-----------------------------------------------------------------------------+
4  | ILIAS open source |
5  +-----------------------------------------------------------------------------+
6  | Copyright (c) 1998-2006 ILIAS open source, University of Cologne |
7  | |
8  | This program is free software; you can redistribute it and/or |
9  | modify it under the terms of the GNU General Public License |
10  | as published by the Free Software Foundation; either version 2 |
11  | of the License, or (at your option) any later version. |
12  | |
13  | This program is distributed in the hope that it will be useful, |
14  | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16  | GNU General Public License for more details. |
17  | |
18  | You should have received a copy of the GNU General Public License |
19  | along with this program; if not, write to the Free Software |
20  | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
21  +-----------------------------------------------------------------------------+
22 */
23 
24 include_once('./Services/Calendar/classes/class.ilDate.php');
25 include_once('./Services/Calendar/classes/class.ilCalendarSettings.php');
26 
35 class ilDatePresentation
36 {
37  public static $use_relative_dates = true;
38  private static $lang = null;
39 
40  public static $today = null;
41  public static $tomorrow = null;
42  public static $yesterday = null;
43 
50  public static function setUseRelativeDates($a_status)
51  {
52  self::$use_relative_dates = $a_status;
53  }
54 
61  public static function useRelativeDates()
62  {
63  return self::$use_relative_dates;
64  }
65 
72  public static function setLanguage($a_lng)
73  {
74  self::$lang = $a_lng;
75  }
76 
83  public static function getLanguage()
84  {
85  global $lng;
86 
87  return self::$lang ? self::$lang : $lng;
88  }
89 
96  public static function resetToDefaults()
97  {
98  global $lng;
99 
100  self::setLanguage($lng);
101  self::setUseRelativeDates(true);
102  }
103 
104 
105 
113  public static function formatDate(ilDateTime $date)
114  {
115  global $lng,$ilUser;
116 
117  if($date->isNull())
118  {
119  return self::getLanguage()->txt('no_date');
120  }
121 
122  $has_time = !is_a($date,'ilDate');
123 
124  // Converting pure dates to user timezone might return wrong dates
125  if($has_time)
126  {
127  $date_info = $date->get(IL_CAL_FKT_GETDATE,'',$ilUser->getTimeZone());
128  }
129  else
130  {
131  $date_info = $date->get(IL_CAL_FKT_GETDATE,'','UTC');
132  }
133 
134 
135  if(self::isToday($date) and self::useRelativeDates())
136  {
137  $date_str = self::getLanguage()->txt('today');
138  }
139  elseif(self::isTomorrow($date) and self::useRelativeDates())
140  {
141  $date_str = self::getLanguage()->txt('tomorrow');
142  }
143  elseif(self::isYesterday($date) and self::useRelativeDates())
144  {
145  $date_str = self::getLanguage()->txt('yesterday');
146  }
147  else
148  {
149  include_once('./Services/Calendar/classes/class.ilCalendarUtil.php');
150  $date_str = $date->get(IL_CAL_FKT_DATE,'d').'. '.
151  ilCalendarUtil::_numericMonthToString($date_info['mon'],false).' '.
152  $date_info['year'];
153  }
154 
155  if(!$has_time)
156  {
157  return $date_str;
158  }
159 
160  switch($ilUser->getTimeFormat())
161  {
162  case ilCalendarSettings::TIME_FORMAT_24:
163  return $date_str.', '.$date->get(IL_CAL_FKT_DATE,'H:i',$ilUser->getTimeZone());
164 
165  case ilCalendarSettings::TIME_FORMAT_12:
166  return $date_str.', '.$date->get(IL_CAL_FKT_DATE,'g:ia',$ilUser->getTimeZone());
167  }
168  }
169 
182  public static function formatPeriod(ilDateTime $start,ilDateTime $end)
183  {
184  global $ilUser;
185 
186  $has_time = !is_a($start,'ilDate');
187 
188  // Same day
189  if(ilDateTime::_equals($start,$end,IL_CAL_DAY,$ilUser->getTimeZone()))
190  {
191  if(!$has_time)
192  {
193  return self::formatDate($start);
194  }
195  else
196  {
197  $date_str = self::formatDate(
198  new ilDate($start->get(IL_CAL_DATE,'',$ilUser->getTimeZone()),IL_CAL_DATE));
199 
200  // $start == $end
201  if(ilDateTime::_equals($start,$end))
202  {
203  switch($ilUser->getTimeFormat())
204  {
205  case ilCalendarSettings::TIME_FORMAT_24:
206  return $date_str.', '.$start->get(IL_CAL_FKT_DATE,'H:i',$ilUser->getTimeZone());
207 
208  case ilCalendarSettings::TIME_FORMAT_12:
209  return $date_str.', '.$start->get(IL_CAL_FKT_DATE,'h:i a',$ilUser->getTimeZone());
210  }
211  }
212  else
213  {
214  switch($ilUser->getTimeFormat())
215  {
216  case ilCalendarSettings::TIME_FORMAT_24:
217  return $date_str.', '.$start->get(IL_CAL_FKT_DATE,'H:i',$ilUser->getTimeZone()).' - '.
218  $end->get(IL_CAL_FKT_DATE,'H:i',$ilUser->getTimeZone());
219 
220  case ilCalendarSettings::TIME_FORMAT_12:
221  return $date_str.', '.$start->get(IL_CAL_FKT_DATE,'g:ia',$ilUser->getTimeZone()).' - '.
222  $end->get(IL_CAL_FKT_DATE,'g:i a',$ilUser->getTimeZone());
223  }
224  }
225  }
226  }
227  // Different days
228  return self::formatDate($start).' - '.self::formatDate($end);
229  }
230 
231 
232 
241  public static function isToday(ilDateTime $date)
242  {
243  global $ilUser;
244 
245  if(!is_object(self::$today))
246  {
247  self::$today = new ilDateTime(time(),IL_CAL_UNIX,$ilUser->getTimeZone());
248  }
249 
250  return ilDateTime::_equals(self::$today,$date,IL_CAL_DAY,$ilUser->getTimeZone());
251  }
252 
261  public static function isYesterday(ilDateTime $date)
262  {
263  global $ilUser;
264 
265  if(!is_object(self::$yesterday))
266  {
267  self::$yesterday = new ilDateTime(time(),IL_CAL_UNIX,$ilUser->getTimeZone());
268  self::$yesterday->increment(IL_CAL_DAY,-1);
269  }
270 
271  return ilDateTime::_equals(self::$yesterday,$date,IL_CAL_DAY,$ilUser->getTimeZone());
272  }
273 
282  public static function isTomorrow(ilDateTime $date)
283  {
284  global $ilUser;
285 
286  if(!is_object(self::$tomorrow))
287  {
288  self::$tomorrow = new ilDateTime(time(),IL_CAL_UNIX,$ilUser->getTimeZone());
289  self::$tomorrow->increment(IL_CAL_DAY,1);
290  }
291 
292  return ilDateTime::_equals(self::$tomorrow,$date,IL_CAL_DAY,$ilUser->getTimeZone());
293  }
294 
295 }
296 ?>