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<?php
/**
* webtrees: online genealogy
* Copyright (C) 2026 webtrees development team
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees\Services;
use Fisharebest\Webtrees\Fact;
use Fisharebest\Webtrees\GedcomRecord;
use Fisharebest\Webtrees\Session;
use Illuminate\Support\Collection;
use function array_slice;
use function explode;
use function is_array;
/**
* Copy and past facts between records.
*/
class ClipboardService
{
// Maximum number of entries in the clipboard.
private const int CLIPBOARD_SIZE = 10;
/**
* Copy a fact to the clipboard.
*
* @param Fact $fact
*/
public function copyFact(Fact $fact): void
{
$clipboard = Session::get('clipboard');
$clipboard = is_array($clipboard) ? $clipboard : [];
$record_type = $fact->record()->tag();
$fact_id = $fact->id();
// If we are copying the same fact twice, make sure the new one is at the end.
unset($clipboard[$record_type][$fact_id]);
$clipboard[$record_type][$fact_id] = $fact->gedcom();
// The clipboard only holds a limited number of facts.
$clipboard[$record_type] = array_slice($clipboard[$record_type], -self::CLIPBOARD_SIZE);
Session::put('clipboard', $clipboard);
}
/**
* Copy a fact from the clipboard to a record.
*
* @param string $fact_id
* @param GedcomRecord $record
*
* @return bool
*/
public function pasteFact(string $fact_id, GedcomRecord $record): bool
{
$clipboard = Session::get('clipboard');
$record_type = $record->tag();
if (isset($clipboard[$record_type][$fact_id])) {
$record->createFact($clipboard[$record_type][$fact_id], true);
return true;
}
return false;
}
/**
* Empty the clipboard
*
* @return void
*/
public function emptyClipboard(): void
{
Session::put('clipboard', []);
}
/**
* Create a list of facts that can be pasted into a given record
*
* @param GedcomRecord $record
*
* @return Collection<int,Fact>
*/
public function pastableFacts(GedcomRecord $record): Collection
{
$clipboard = Session::get('clipboard');
$clipboard = is_array($clipboard) ? $clipboard : [];
$facts = $clipboard[$record->tag()] ?? [];
return (new Collection($facts))
->reverse()
->map(static fn (string $clipping): Fact => new Fact($clipping, $record, md5($clipping)));
}
/**
* Find facts of a given type, from all records.
*
* @param GedcomRecord $record
* @param Collection<int,string> $types
*
* @return Collection<int,Fact>
*/
public function pastableFactsOfType(GedcomRecord $record, Collection $types): Collection
{
$clipboard = Session::get('clipboard');
$clipboard = is_array($clipboard) ? $clipboard : [];
// The facts are stored in the session.
return (new Collection($clipboard))
->flatten(1)
->reverse()
->map(static fn (string $clipping): Fact => new Fact($clipping, $record, md5($clipping)))
->filter(static fn (Fact $fact): bool => $types->contains(explode(':', $fact->tag())[1]));
}
}
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