static function bootTreeTrait()
{
Static::saving(function ($model) {
if (!$model->getNameField()) {
throw new Exception('Please set $name_field', 1);
}
if (!$model->getPathField()) {
throw new Exception('Please set $path_field', 1);
} else {
$model->{$model->getPathField()} = '';
}
$new_instance = $model->newInstance();
// RULES
$rules['parent_id'] = ['integer', 'min:0'];
if ($model->parent_id) {
$rules['parent_id'][] = 'exists:' . $model->getTable() . ',id';
}
$validator = Validator::make($model->toArray(), $rules);
if ($validator->fails()) {
$model->setErrors($validator->messages());
return false;
} else {
if ($model->parent_id) {
$parent = $new_instance->findorfail($model->parent_id);
$model->{$model->getPathField()} = $parent->{$model->getPathField()};
$model->{$model->getPathField()} = ($model->{$model->getPathField()} ? $model->{$model->getPathField()} . $model->getDelimiter() : '') . str_slug($model->{$model->getNameField()});
} else {
$model->{$model->getPathField()} = str_slug($model->{$model->getNameField()});
}
// Check Duplicated path
$rules['path'] = ['unique:' . $new_instance->getTable() . ',path,' . ($model->id ? $model->id : 'NULL') . ',id'];
$validator = Validator::make(['path' => $model->path], $rules, ['unique' => 'Data ' . $model->{$model->getNameField()} . ' already exists']);
if ($validator->fails()) {
$model->setErrors($validator->messages());
return false;
}
}
});
Static::updated(function ($model) {
if (!str_is($model->{$model->getPathField()}, $model->getOriginal($model->getPathField()))) {
foreach ($model->children as $x) {
$x->save();
}
}
});
Static::deleting(function ($model) {
if ($model->children->count()) {
$model->setErrors('Fail to delete ' . $model->{$model->getNameField()} . ' as it has subtrees');
return false;
}
});
}