silverstripe-userforms/code/Modifier/DisambiguationSegmentFieldModifier.php

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<?php
namespace SilverStripe\UserForms\Modifier;
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use SilverStripe\Forms\SegmentFieldModifier\AbstractSegmentFieldModifier;
use EditableformField;
use SilverStripe\Forms\Form;
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class DisambiguationSegmentFieldModifier extends AbstractSegmentFieldModifier
{
/**
* @inheritdoc
*
* @param string $value
*
* @return string
*/
public function getPreview($value)
{
if ($this->form instanceof Form && $record = $this->form->getRecord()) {
$parent = $record->Parent();
$try = $value;
$sibling = EditableformField::get()
->filter('ParentID', $parent->ID)
->filter('Name', $try)
->where('"ID" != ' . $record->ID)
->first();
$counter = 1;
while ($sibling !== null) {
$try = $value . '_' . $counter++;
$sibling = EditableformField::get()
->filter('ParentID', $parent->ID)
->filter('Name', $try)
->first();
}
if ($try !== $value) {
return $try;
}
}
return $value;
}
/**
* @inheritdoc
*
* @param string $value
*
* @return string
*/
public function getSuggestion($value)
{
return $this->getPreview($value);
}
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}