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<?php
namespace dokuwiki\Ui;
use dokuwiki\ChangeLog\ChangeLog;
/**
* DokuWiki Diff Interface
* parent class of PageDiff and MediaDiff
*
* @package dokuwiki\Ui
*/
abstract class Diff extends Ui
{
/* @var string */
protected $id; // page id or media id
/* @var int|false */
protected $rev1; // timestamp of older revision
/* @var int|false */
protected $rev2; // timestamp of newer revision
/* @var array */
protected $preference = [];
/* @var ChangeLog */
protected $changelog; // PageChangeLog or MediaChangeLog object
/**
* Diff 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();
/**
* Prepare revision info of comparison pair
*/
abstract protected function preProcess();
/**
* Set a pair of revisions to be compared
*
* @param int $rev1 older revision
* @param int $rev2 newer revision
* @return $this
*/
public function compare($rev1, $rev2)
{
if ($rev2 < $rev1) [$rev1, $rev2] = [$rev2, $rev1];
$this->rev1 = (int)$rev1;
$this->rev2 = (int)$this->changelog->traceCurrentRevision($rev2);
return $this;
}
/**
* Gets or Sets preference of the Ui\Diff object
*
* @param string|array $prefs a key name or key-value pair(s)
* @param mixed $value value used when the first args is string
* @return array|$this
*/
public function preference($prefs = null, $value = null)
{
// set
if (is_string($prefs) && isset($value)) {
$this->preference[$prefs] = $value;
return $this;
} elseif (is_array($prefs)) {
foreach ($prefs as $name => $value) {
$this->preference[$name] = $value;
}
return $this;
}
// get
return $this->preference;
}
/**
* Handle requested revision(s)
*
* @return void
*/
protected function handle()
{
global $INPUT;
// diff link icon click, eg. &do=diff&rev=#
if ($INPUT->has('rev')) {
$this->rev1 = $INPUT->int('rev');
$this->rev2 = $this->changelog->currentRevision();
if ($this->rev2 <= $this->rev1) {
// fallback to compare previous with current
unset($this->rev1, $this->rev2);
}
}
// submit button with two checked boxes, eg. &do=diff&rev2[0]=#&rev2[1]=#
$revs = $INPUT->arr('rev2', []);
if (count($revs) > 1) {
[$rev1, $rev2] = $revs;
if ($rev2 < $rev1) [$rev1, $rev2] = [$rev2, $rev1];
$this->rev1 = (int)$rev1;
$this->rev2 = (int)$this->changelog->traceCurrentRevision($rev2);
}
// no revision was given, compare previous to current
if (!isset($this->rev1, $this->rev2)) {
$rev2 = $this->changelog->currentRevision();
if ($rev2 > $this->changelog->lastRevision()) {
$rev1 = $this->changelog->lastRevision();
} else {
$revs = $this->changelog->getRevisions(0, 1);
$rev1 = count($revs) ? $revs[0] : false;
}
$this->rev1 = $rev1;
$this->rev2 = $rev2;
}
}
}
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