CRM/Utils/Pager.php

   1 <?php
   2 /*
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   4  | CiviCRM version 4.6                                                |
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   8  | This file is a part of CiviCRM.                                    |
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  10  | CiviCRM is free software; you can copy, modify, and distribute it  |
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  26 */
  27
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2014
  32  * $Id$
  33  *
  34  */
  35
  36 /**
  37  *
  38  * This class extends the PEAR pager object by substituting standard default pager arguments
  39  * We also extract the pageId from either the GET variables or the POST variable (since we
  40  * use a POST to jump to a specific page). At some point we should evaluate if we want
  41  * to use Pager_Jumping instead. We've changed the format to allow navigation by jumping
  42  * to a page and also First, Prev CURRENT Next Last
  43  *
  44  */
  45
  46 require_once 'Pager/Sliding.php';
  47
  48 /**
  49  * Class CRM_Utils_Pager
  50  */
  51 class CRM_Utils_Pager extends Pager_Sliding {
  52
  53   /**
  54    * Constants for static parameters of the pager
  55    */
  56   const ROWCOUNT = 50, PAGE_ID = 'crmPID', PAGE_ID_TOP = 'crmPID', PAGE_ID_BOTTOM = 'crmPID_B', PAGE_ROWCOUNT = 'crmRowCount';
  57
  58   /**
  59    * The output of the pager. This is a name/value array with various keys
  60    * that an application could use to display the pager
  61    * @var array
  62    */
  63   public $_response;
  64
  65   /**
  66    * The pager constructor. Takes a few values, and then assigns a lot of defaults
  67    * to the PEAR pager class
  68    * We have embedded some html in this class. Need to figure out how to export this
  69    * to the top level at some point in time
  70    *
  71    * @param array $params
  72    *
  73    * @internal param \total $int the total count of items to be displayed
  74    * @internal param \currentPage $int the page currently being displayed
  75    * @internal param \status $string the status message to be displayed. It embeds a token
  76    *                             %%statusMessage%% that will be replaced with which items
  77    *                             are currently being displayed
  78    * @internal param \csvString $string the title of the link to be displayed for the export
  79    * @internal param \perPage $int the number of items displayed per page
  80    *
  81    * @return \CRM_Utils_Pager the newly created and initialized pager object@access public
  82    */
  83   public function __construct($params) {
  84     if ($params['status'] === NULL) {
  85       $params['status'] = ts('Contacts %%StatusMessage%%');
  86     }
  87
  88     $this->initialize($params);
  89
  90     $this->Pager_Sliding($params);
  91
  92     list($offset, $limit) = $this->getOffsetAndRowCount();
  93     $start = $offset + 1;
  94     $end = $offset + $limit;
  95     if ($end > $params['total']) {
  96       $end = $params['total'];
  97     }
  98
  99     if ($params['total'] == 0) {
 100       $statusMessage = '';
 101     }
 102     else {
 103       $statusMessage = ts('%1 - %2 of %3', array(1 => $start, 2 => $end, 3 => $params['total']));
 104     }
 105     $params['status'] = str_replace('%%StatusMessage%%', $statusMessage, $params['status']);
 106
 107     $this->_response = array(
 108       'first' => $this->getFirstPageLink(),
 109       'back' => $this->getBackPageLink(),
 110       'next' => $this->getNextPageLink(),
 111       'last' => $this->getLastPageLink(),
 112       'currentPage' => $this->getCurrentPageID(),
 113       'numPages' => $this->numPages(),
 114       'csvString' => CRM_Utils_Array::value('csvString', $params),
 115       'status' => CRM_Utils_Array::value('status', $params),
 116       'buttonTop' => CRM_Utils_Array::value('buttonTop', $params),
 117       'buttonBottom' => CRM_Utils_Array::value('buttonBottom', $params),
 118       'currentLocation' => $this->getCurrentLocation(),
 119     );
 120
 121     /**
 122      * A page cannot have two variables with the same form name. Hence in the
 123      * pager display, we have a form submission at the top with the normal
 124      * page variable, but a different form element for one at the bottom
 125      *
 126      */
 127     $this->_response['titleTop'] = ts('Page %1 of %2', array(1 => '<input size="2" maxlength="3" name="' . self::PAGE_ID . '" type="text" value="' . $this->_response['currentPage'] . '" />', 2 => $this->_response['numPages']));
 128     $this->_response['titleBottom'] = ts('Page %1 of %2', array(1 => '<input size="2" maxlength="3" name="' . self::PAGE_ID_BOTTOM . '" type="text" value="' . $this->_response['currentPage'] . '" />', 2 => $this->_response['numPages']));
 129   }
 130
 131   /**
 132    * Helper function to assign remaining pager options as good default
 133    * values
 134    *
 135    * @param array   $params      the set of options needed to initialize the parent
 136    *                             constructor
 137    *
 138    *
 139    * @return void
 140    *
 141    */
 142   public function initialize(&$params) {
 143     /* set the mode for the pager to Sliding */
 144
 145     $params['mode'] = 'Sliding';
 146
 147     /* also set the urlVar to be a crm specific get variable */
 148
 149     $params['urlVar'] = self::PAGE_ID;
 150
 151     /* set this to a small value, since we dont use this functionality */
 152
 153     $params['delta'] = 1;
 154
 155     $params['totalItems'] = $params['total'];
 156     $params['append'] = TRUE;
 157     $params['separator'] = '';
 158     $params['spacesBeforeSeparator'] = 1;
 159     $params['spacesAfterSeparator'] = 1;
 160     $params['extraVars'] = array('force' => 1);
 161     $params['excludeVars'] = array('reset', 'snippet', 'section');
 162
 163     // set previous and next text labels
 164     $params['prevImg'] = ' ' . ts('&lt; Previous');
 165     $params['nextImg'] = ts('Next &gt;') . ' ';
 166
 167
 168     // set first and last text fragments
 169     $params['firstPagePre'] = '';
 170     $params['firstPageText'] = ' ' . ts('&lt;&lt; First');
 171     $params['firstPagePost'] = '';
 172
 173     $params['lastPagePre'] = '';
 174     $params['lastPageText'] = ts('Last &gt;&gt;') . ' ';
 175     $params['lastPagePost'] = '';
 176
 177     if (isset($params['pageID'])) {
 178       $params['currentPage'] = $this->getPageID($params['pageID'], $params);
 179     }
 180
 181     $params['perPage'] = $this->getPageRowCount($params['rowCount']);
 182
 183     return $params;
 184   }
 185
 186   /**
 187    * Figure out the current page number based on value of
 188    * GET / POST variables. Hierarchy rules are followed,
 189    * POST over-rides a GET, a POST at the top overrides
 190    * a POST at the bottom (of the page)
 191    *
 192    * @param int $defaultPageId defaultPageId   current pageId
 193    *
 194    * @param array $params
 195    *
 196    * @return int                new pageId to display to the user
 197    */
 198   public function getPageID($defaultPageId = 1, &$params) {
 199     // POST has higher priority than GET vars
 200     // else if a value is set that has higher priority and finally the GET var
 201     $currentPage = $defaultPageId;
 202     if (!empty($_POST)) {
 203       if (isset($_POST[CRM_Utils_Array::value('buttonTop', $params)]) && isset($_POST[self::PAGE_ID])) {
 204         $currentPage = max((int )@$_POST[self::PAGE_ID], 1);
 205       }
 206       elseif (isset($_POST[$params['buttonBottom']]) && isset($_POST[self::PAGE_ID_BOTTOM])) {
 207         $currentPage = max((int )@$_POST[self::PAGE_ID_BOTTOM], 1);
 208       }
 209       elseif (isset($_POST[self::PAGE_ID])) {
 210         $currentPage = max((int )@$_POST[self::PAGE_ID], 1);
 211       }
 212       elseif (isset($_POST[self::PAGE_ID_BOTTOM])) {
 213         $currentPage = max((int )@$_POST[self::PAGE_ID_BOTTOM]);
 214       }
 215     }
 216     elseif (isset($_GET[self::PAGE_ID])) {
 217       $currentPage = max((int )@$_GET[self::PAGE_ID], 1);
 218     }
 219     return $currentPage;
 220   }
 221
 222   /**
 223    * Get the number of rows to display from either a GET / POST variable
 224    *
 225    * @param int $defaultPageRowCount the default value if not set
 226    *
 227    * @return int                     the rowCount value to use
 228    *
 229    */
 230   public function getPageRowCount($defaultPageRowCount = self::ROWCOUNT) {
 231     // POST has higher priority than GET vars
 232     if (isset($_POST[self::PAGE_ROWCOUNT])) {
 233       $rowCount = max((int )@$_POST[self::PAGE_ROWCOUNT], 1);
 234     }
 235     elseif (isset($_GET[self::PAGE_ROWCOUNT])) {
 236       $rowCount = max((int )@$_GET[self::PAGE_ROWCOUNT], 1);
 237     }
 238     else {
 239       $rowCount = $defaultPageRowCount;
 240     }
 241     return $rowCount;
 242   }
 243
 244   /**
 245    * Use the pager class to get the pageId and Offset
 246    *
 247    * @param void
 248    *
 249    * @return array: an array of the pageID and offset
 250    *
 251    *
 252    */
 253   public function getOffsetAndRowCount() {
 254     $pageId = $this->getCurrentPageID();
 255     if (!$pageId) {
 256       $pageId = 1;
 257     }
 258
 259     $offset = ($pageId - 1) * $this->_perPage;
 260
 261     return array($offset, $this->_perPage);
 262   }
 263
 264   /**
 265    * @return string
 266    */
 267   public function getCurrentLocation() {
 268     $config = CRM_Core_Config::singleton();
 269     $path = CRM_Utils_Array::value($config->userFrameworkURLVar, $_GET);
 270     return CRM_Utils_System::url($path, CRM_Utils_System::getLinksUrl(self::PAGE_ID, FALSE, TRUE), FALSE, NULL, FALSE) . $this->getCurrentPageID();
 271   }
 272
 273   /**
 274    * @return string
 275    */
 276   public function getFirstPageLink() {
 277     if ($this->isFirstPage()) {
 278       return '';
 279     }
 280     $href = $this->makeURL(self::PAGE_ID, 1);
 281     return $this->formatLink($href, str_replace('%d', 1, $this->_altFirst), $this->_firstPagePre . $this->_firstPageText . $this->_firstPagePost) .
 282       $this->_spacesBefore . $this->_spacesAfter;
 283   }
 284
 285   /**
 286    * @return string
 287    */
 288   public function getLastPageLink() {
 289     if ($this->isLastPage()) {
 290       return '';
 291     }
 292     $href = $this->makeURL(self::PAGE_ID, $this->_totalPages);
 293     return $this->formatLink($href, str_replace('%d', $this->_totalPages, $this->_altLast), $this->_lastPagePre . $this->_lastPageText . $this->_lastPagePost);
 294   }
 295
 296   /**
 297    * @return string
 298    */
 299   public function getBackPageLink() {
 300     if ($this->_currentPage > 1) {
 301       $href = $this->makeURL(self::PAGE_ID, $this->getPreviousPageID());
 302       return $this->formatLink($href, $this->_altPrev, $this->_prevImg) . $this->_spacesBefore . $this->_spacesAfter;
 303     }
 304     return '';
 305   }
 306
 307   /**
 308    * @return string
 309    */
 310   public function getNextPageLink() {
 311     if ($this->_currentPage < $this->_totalPages) {
 312       $href = $this->makeURL(self::PAGE_ID, $this->getNextPageID());
 313       return $this->_spacesAfter .
 314         $this->formatLink($href, $this->_altNext, $this->_nextImg) .
 315         $this->_spacesBefore . $this->_spacesAfter;
 316     }
 317     return '';
 318   }
 319
 320   /**
 321    * Build a url for pager links
 322    */
 323   public function makeURL($key, $value) {
 324     $href = CRM_Utils_System::makeURL($key, TRUE);
 325     // CRM-12212 Remove alpha sort param
 326     if (strpos($href, '&amp;sortByCharacter=')) {
 327       $href = preg_replace('#(.*)\&amp;sortByCharacter=[^&]*(.*)#', '\1\2', $href);
 328     }
 329     return $href . $value;
 330   }
 331
 332   /**
 333    * Output the html pager link
 334    * @param string $href
 335    * @param string $title
 336    * @param string $image
 337    * @return string
 338    */
 339   private function formatLink($href, $title, $image) {
 340     return sprintf('<a class="crm-pager-link action-item crm-hover-button" href="%s" title="%s">%s</a>', $href, $title, $image);
 341   }
 342 }