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<?php
namespace dokuwiki\Ui;
use dokuwiki\ChangeLog\ChangeLog;
/**
* DokuWiki Revisions Interface
* parent class of PageRevisions and MediaRevisions
*
* @package dokuwiki\Ui
*/
abstract class Revisions extends Ui
{
/* @var string */
protected $id; // page id or media id
/* @var ChangeLog */
protected $changelog; // PageChangeLog or MediaChangeLog object
/**
* Revisions Ui constructor
*
* @param string $id page id or media id
*/
public function __construct($id)
{
$this->id = $id;
$this->setChangeLog();
}
/**
* set class property changelog
*/
abstract protected function setChangeLog();
/**
* Get revisions, and set correct pagination parameters (first, hasNext)
*
* @param int $first
* @param bool $hasNext
* @return array revisions to be shown in a paginated list
* @see also https://www.dokuwiki.org/devel:changelog
*/
protected function getRevisions(&$first, &$hasNext)
{
global $conf;
$changelog =& $this->changelog;
$revisions = [];
$currentRevInfo = $changelog->getCurrentRevisionInfo();
if (!$currentRevInfo) return $revisions;
$num = $conf['recent'];
if ($first == 0) {
// add external or existing last revision that is excluded from $changelog->getRevisions()
if (array_key_exists('timestamp', $currentRevInfo) || (
$currentRevInfo['type'] != DOKU_CHANGE_TYPE_DELETE &&
$currentRevInfo['date'] == $changelog->lastRevision() )
) {
$revisions[] = $currentRevInfo;
$num = $num - 1;
}
}
/* we need to get one additional log entry to be able to
* decide if this is the last page or is there another one.
* see also Ui\Recent::getRecents()
*/
$revlist = $changelog->getRevisions($first, $num + 1);
if (count($revlist) == 0 && $first > 0) {
// resets to zero if $first requested a too high number
$first = 0;
return $this->getRevisions($first, $hasNext);
}
// decide if this is the last page or is there another one
$hasNext = false;
if (count($revlist) > $num) {
$hasNext = true;
array_pop($revlist); // remove one additional log entry
}
// append each revision info array to the revisions
foreach ($revlist as $rev) {
$revisions[] = $changelog->getRevisionInfo($rev);
}
return $revisions;
}
/**
* Navigation buttons for Pagination (prev/next)
*
* @param int $first
* @param bool $hasNext
* @param callable $callback returns array of hidden fields for the form button
* @return string html
*/
protected function navigation($first, $hasNext, $callback)
{
global $conf;
$html = '<div class="pagenav">';
$last = $first + $conf['recent'];
if ($first > 0) {
$first = max($first - $conf['recent'], 0);
$html.= '<div class="pagenav-prev">';
$html.= html_btn('newer', $this->id, "p", $callback($first));
$html.= '</div>';
}
if ($hasNext) {
$html.= '<div class="pagenav-next">';
$html.= html_btn('older', $this->id, "n", $callback($last));
$html.= '</div>';
}
$html.= '</div>';
return $html;
}
}
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