mods/photo_album/classes/pa_admin_image.class.php

   1 <?php\r
   2 /*==============================================================\r
   3   Photo Album\r
   4  ==============================================================\r
   5   Copyright (c) 2006 by Dylan Cheon & Kelvin Wong\r
   6   Institute for Assistive Technology / University of Victoria\r
   7   http://www.canassist.ca/                                    \r
   8                                                                \r
   9   This program is free software. You can redistribute it and/or\r
  10   modify it under the terms of the GNU General Public License  \r
  11   as published by the Free Software Foundation.                \r
  12  ==============================================================\r
  13  */\r
  14 // $Id:\r
  15 \r
  16 /**\r
  17  * @desc        This file generates all the image data to be used for the admin / instructor pages\r
  18  * @author      Dylan Cheon & Kelvin Wong\r
  19  * @copyright   2006, Institute for Assistive Technology / University of Victoria \r
  20  * @link        http://www.canassist.ca/                                    \r
  21  * @license GNU\r
  22  */\r
  23  \r
  24 require_once ('define.php');\r
  25 require_once ('classes/pa.class.php');\r
  26 require_once ('include/general_func.php');\r
  27 require_once ('include/data_func.php');\r
  28 \r
  29 /**\r
  30  * @desc        Pa_admin_image class.  \r
  31  * @see         class Pa\r
  32  */\r
  33 class Pa_Admin_Image extends PA{\r
  34         var $mode=POSTED_NEW;\r
  35         var $image_array=Array();\r
  36         var $page_array=Array();\r
  37         var $current_page=-1;\r
  38         var $show_page_left_buttons=false;\r
  39         var $show_page_right_buttons=false;\r
  40         var $total=NOT_SET;\r
  41         var $last_page=NOT_SET;\r
  42         \r
  43         /** \r
  44          * @desc        constructor\r
  45          */\r
  46         function Pa_Admin_Image(){\r
  47                 $this->checkAuthority();\r
  48                 parent::init();\r
  49                 $this->checkRequest();\r
  50                 $this->setMode();\r
  51                 $this->checkCurrentPage();\r
  52                 $this->setImages();\r
  53                 $this->setPages();\r
  54         \r
  55         }\r
  56         \r
  57         /**\r
  58          * @desc        This function checks the request to change the image status. The request could be make approved, make disapproved, or make new\r
  59          */\r
  60         function checkRequest(){\r
  61                 if (isset($_POST['button_disapprove'])){\r
  62                   for ($i=0; $i < ADMIN_NUMBER_OF_IMAGE_PAGE; $i++){\r
  63                     $string="imageId".$i;\r
  64                     if (isset($_POST[$string])){\r
  65                                 modify_image_status($_POST[$string], $this->getVariable('course_id'), DISAPPROVED);  \r
  66                     }\r
  67                   }\r
  68                 } else if (isset($_POST['button_approve'])){\r
  69                   for ($i=0; $i< ADMIN_NUMBER_OF_IMAGE_PAGE; $i++){\r
  70                     $string="imageId".$i;\r
  71                     if (isset($_POST[$string])){\r
  72                           modify_image_status($_POST[$string], $this->getVariable('course_id'), APPROVED);\r
  73                         }\r
  74                   }\r
  75                 } else if (isset($_POST['button_post_new'])){\r
  76                   for ($i=0; $i < ADMIN_NUMBER_OF_IMAGE_PAGE; $i++){\r
  77                         $string="imageId".$i;  \r
  78                         if (isset($_POST[$string])){\r
  79                             modify_image_status($_POST[$string], $this->getVariable('course_id'), POSTED_NEW);\r
  80                         }\r
  81                   }  \r
  82                 }\r
  83         }\r
  84         \r
  85         /**\r
  86          * @desc        This function checks if the user is an instructor or an administrator.  If the user is neither instructor nor administrator, it redirects the user to the index page\r
  87          */\r
  88         function checkAuthority(){\r
  89                 if (is_admin_for_course()!=true){\r
  90                         redirect('index.php');\r
  91                 }\r
  92         }\r
  93         \r
  94         /**\r
  95          * @desc        This function decides whether to display left arrow and right arrow buttons on the page table\r
  96          */\r
  97         function setPages(){\r
  98                 $temp=get_page_array(ADMIN_NUMBER_OF_IMAGE, ADMIN_NUMBER_OF_IMAGE_PAGE, $this->getVariable('current_page'), $this->getVariable('last_page'));\r
  99                 $current=$this->getVariable('current_page');\r
 100                 if ($current > 1){\r
 101                         $this->setVariable('show_page_left_buttons', true);\r
 102                 } \r
 103                 if ($current < $temp['last_page']){\r
 104                         $this->setVariable('show_page_right_buttons', true);\r
 105                 }\r
 106                 $this->page_array=&$temp;\r
 107                 \r
 108         }       \r
 109         \r
 110         /**\r
 111          * @desc        This function sets the mode value for the image display.  The mode value can be POSTED_NEW, APPROVED, or DISAPPROVED\r
 112          */\r
 113         function setMode(){\r
 114                 if (isset($_GET['mode'])){\r
 115                         $this->setVariable('mode', intval($_GET['mode']));\r
 116                 } \r
 117         }\r
 118         \r
 119         /**\r
 120          * @desc        This function checks if the current page is valid.  Otherwise, the current page is set to 1\r
 121          */\r
 122         function checkCurrentPage(){\r
 123                 $total=get_total_image_number(ADMIN_PANEL, $this->getVariable('course_id'), $this->getVariable('mode'));\r
 124                 $last_page=get_last_page(ADMIN_NUMBER_OF_IMAGE, $total);\r
 125                 $this->setVariable('total', $total);\r
 126                 $this->setVariable('last_page', $last_page);\r
 127                 if (!isset($_GET['current_page'])){\r
 128                         $this->setVariable('current_page', FIRST_PAGE);\r
 129                 } else {\r
 130                         $current_page=to_pos_int($_GET['current_page']);\r
 131                         if ($current_page > $last_page){\r
 132                                 $this->setVariable('current_page',$last_page);\r
 133                         } else {\r
 134                                 $this->setVariable('current_page', $current_page);\r
 135                         }\r
 136                 }\r
 137         }\r
 138         \r
 139         /**\r
 140          * @desc        This function sets the image array\r
 141          */\r
 142         function setImages(){\r
 143                 $temp=get_image_array(ADMIN_PANEL, parent::getVariable('course_id'), $this->getVariable('mode'), $this->getVariable('current_page'), ADMIN_NUMBER_OF_IMAGE);\r
 144                 $this->image_array=&$temp;\r
 145         }\r
 146                         \r
 147         /**\r
 148          * @desc        This function sets the given string value for the class object\r
 149          * @param       String  $string         string name to be set\r
 150          * @param       mixed   $value          string value\r
 151          */\r
 152         function setVariable($string, $value){\r
 153                 switch ($string){\r
 154                         case 'mode':\r
 155                                 if ($value==APPROVED || $value==DISAPPROVED || $value==POSTED_NEW){\r
 156                                         $this->{$string}=$value;\r
 157                                 }\r
 158                         break;\r
 159                         case 'current_page':\r
 160                         case 'last_page':\r
 161                         case 'total':\r
 162                                 if (is_int($value)){\r
 163                                         $this->{$string}=$value;\r
 164                                 } else {\r
 165                                         parent::storeError("value ".$string." is not integer");\r
 166                                 }\r
 167                         break;\r
 168                         case 'show_page_left_buttons':\r
 169                         case 'show_page_right_buttons':\r
 170                                 if (is_bool($value)){\r
 171                                         $this->{$string}=$value;\r
 172                                 } else {\r
 173                                         parent::storeError("value ".$string." is not boolean");\r
 174                                 }\r
 175                         break;\r
 176                 }\r
 177         }\r
 178 }