/** * Move a node under the same parent node or under a new node. * New position of the node can be specified * * @param int $id ID of the node to move * @param int $parent_id ID of the (new) parent node * @param int $position New position of the node. Position is zero based. * @return boolean */ public function moveNode($id, $parent_id, $position = null) { $primaryKey = $this->_table->schema()->primaryKey(); $primaryKey = count($primaryKey) == 1 ? $primaryKey[0] : $primaryKey; $parent_id_fieldname = $this->config('model_parent_id_fieldname'); $sort_fieldname = $this->config('model_sort_fieldname'); $connection = $this->_table->connection(); $connection->begin(); $result = true; /* * Get moved node */ $node = $this->_table->get($id); /* * Get current nodes positions of (new) siblings */ $current_children = $this->_table->query()->where([$parent_id_fieldname => $parent_id])->order([$sort_fieldname => 'asc']); $new_sort_children = []; foreach ($current_children as $current_position => $current_child) { if ($current_child->{$primaryKey} != $id) { $new_sort_children[] = $current_child; } } /* * Default position is after all siblings */ $position = isset($position) ? $position : $current_children->count(); $position = $position >= 0 ? $position : 0; $position = $position <= count($new_sort_children) ? $position : count($new_sort_children); /* * Insert moved node at position */ array_splice($new_sort_children, $position, 0, array($node)); /* * If node has a new parent -> save it */ if ($node->{$parent_id_fieldname} != $parent_id) { $query = $this->_table->query()->update()->set([$parent_id_fieldname => $parent_id])->where([$primaryKey => $id]); if (!$query->execute()) { $result = false; } } /* * Update positions */ foreach ($new_sort_children as $index => $new_sort_child) { $query = $this->_table->query()->update()->set([$sort_fieldname => $index * 10])->where([$primaryKey => $new_sort_child->{$primaryKey}]); if (!$query->execute()) { $result = false; } } /***********/ if ($result) { $connection->commit(); } else { $connection->rollback(); } return $result; }
/** * Auxiliary function used to automatically alter the value of both the left and * right columns by a certain amount that match the passed conditions * * @param int $shift the value to use for operating the left and right columns * @param string $dir The operator to use for shifting the value (+/-) * @param string $conditions a SQL snipped to be used for comparing left or right * against it. * @param bool $mark whether to mark the updated values so that they can not be * modified by future calls to this function. * @return void */ protected function _sync($shift, $dir, $conditions, $mark = false) { $config = $this->config(); foreach ([$config['left'], $config['right']] as $field) { $query = $this->_scope($this->_table->query()); $mark = $mark ? '*-1' : ''; $template = sprintf('%s = (%s %s %s)%s', $field, $field, $dir, $shift, $mark); $query->update()->set($query->newExpr()->add($template)); $query->where("{$field} {$conditions}"); $query->execute(); } }