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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace EventEspresso\core\services\orm\tree_traversal;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use EE_Base_Class;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Exception;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Class ModelObjNodeTreeDTO  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Class for storing the discovered tree of model object dependencies. It is stored in a format that can be easily and  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * efficiently serialized for persistence, and unserialized with minimal memory usage, and so we can pickup where  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * we left off.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * A tree of objects would be more convenient (my original implementation used that) but we'd need to either unserialize  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * to a PHP array and then ALSO build that data structure (which would be trouble when there could be thousands of  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * entries); or we'd need to write our own parser (which was fun excercise in school, but no thank you.)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package     Event Espresso  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author         Mike Nelson  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @since         $VID:$  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class ModelObjNodeTreeDTO  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const INDEX_PATH = 'ip';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const ROOTS = 'rts';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const MODEL = 'm';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const ITEMS = 'i';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const ID = 'id';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const RELATIONSHIPS = 'r';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const COUNT = 'c';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var array with a special structure. Like the following:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  "index_path": [0,3,1,2],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  "roots": [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *      { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *          "model": "Event",  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *          "items": [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *              { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                  "id": 123,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                  "rels": [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                      { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                          "model": "Datetime"  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                          "count": 3  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                          "items": [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                              { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                  "id": 456,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                  "rels": [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                      { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                          "model": "Datetime_Ticket",  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                          "count": 1,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                          "items": [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                              { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                  "id": 789,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                  "rels": [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                      { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                          "model": "Extra_Meta",  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                          "count": 0,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                          "items":[],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                      }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                      // ... other models that have foreign keys to Datetime_Ticket  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                                  ]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                              }.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                          ]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                      },  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                      // ... other models that have foreign keys to Datetime  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                                  ]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                              },  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                              // ... 2 more datetimes (unless we haven't fetched them from the DB yet. The count  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                              // is useful here to know if we need to fetch more or not  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                          ]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                      },  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                      //  ...other models that have foreign keys to events, including implicit join models  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *                  ]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *              },  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *              // ...other root events that we want to traverse  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *          ],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *          /// ...other models with root nodes  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *      }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $data;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @since $VID:$  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param EE_Base_Class[] $model_objs  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function initializeRootNodes($model_objs){ | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->data = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            self::INDEX_PATH => [0,0],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            self::ROOTS => []  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        foreach($model_objs as $model_obj) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (!$model_obj instanceof EE_Base_Class) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                throw new \InvalidArgumentException(esc_html__('You must initialize a ModelObjNodeTreeDTO with an array of EE_Base_Class.', 'event_espresso')); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (!isset($this->data[ self::ROOTS ])){ | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $this->data[ self::ROOTS ][ $model_obj->get_model()->get_this_model_name() ] = [];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->data[self::ROOTS][$model_obj->get_model()->get_this_model_name()][] = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                self::ID => $model_obj->ID(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                self::RELATIONSHIPS => []  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @since $VID:$  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param array $data  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function loadData(&$data)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->data = $data;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Returns a reference to the data (so it's not duplicated, because it could be really big).  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @since $VID:$  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return array  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function &getData()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->data;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @since $VID:$  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param EE_Base_Class $model_obj  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function addDiscoveredItem($model_obj){ | 
            
            
                                                                        
                            
            
                                    
            
            
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                        // Figure out where our current spot in the tree.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $current_items_list = $this->getCurrentItemList();  | 
            
                            
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                 | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    134
                 | 
                                    
                                                     | 
                
                 | 
                        // Ensure the data is of the correct type.  | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    135
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    136
                 | 
                                    
                                                     | 
                
                 | 
                        // Add data that corresponds to it to that spot.  | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    137
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    138
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                     * Returns a list of indexes to follow.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                     * @since $VID:$  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    143
                 | 
                                    
                                                     | 
                
                 | 
                     * @return array  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    144
                 | 
                                    
                                                     | 
                
                 | 
                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    145
                 | 
                                    
                                                     | 
                
                 | 
                    protected function getIndexPath()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    146
                 | 
                                    
                                                     | 
                
                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    147
                 | 
                                    
                                                     | 
                
                 | 
                        return $this->data[self::INDEX_PATH];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    148
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    149
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    150
                 | 
                                    
                                                     | 
                
                 | 
                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    151
                 | 
                                    
                                                     | 
                
                 | 
                     * @since $VID:$  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    152
                 | 
                                    
                                                     | 
                
                 | 
                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    153
                 | 
                                    
                                                     | 
                
                 | 
                    public function getCurrentItemList()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    154
                 | 
                                    
                                                     | 
                
                 | 
                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    155
                 | 
                                    
                                                     | 
                
                 | 
                        $traverser = &$this->data[ self::ROOTS ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    156
                 | 
                                    
                                                     | 
                
                 | 
                        foreach ($this->getIndexPath() as $index) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    157
                 | 
                                    
                                                     | 
                
                 | 
                            if (isset($traverser[ $index ])) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    158
                 | 
                                    
                                                     | 
                
                 | 
                                if (isset($traverser[ $index ][ self::ID ])) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    159
                 | 
                                    
                                                     | 
                
                 | 
                                    $traverser = &$traverser[ $index ][ self::RELATIONSHIPS ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    160
                 | 
                                    
                                                     | 
                
                 | 
                                } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    161
                 | 
                                    
                                                     | 
                
                 | 
                                    $traverser = &$traverser[ $index ][ self::ITEMS ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    162
                 | 
                                    
                                                     | 
                
                 | 
                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    163
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    164
                 | 
                                    
                                                     | 
                
                 | 
                            } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    165
                 | 
                                    
                                                     | 
                
                 | 
                                throw new Exception(esc_html__('Index out of sync', 'event_espresso')); | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    166
                 | 
                                    
                                                     | 
                
                 | 
                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    167
                 | 
                                    
                                                     | 
                
                 | 
                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    168
                 | 
                                    
                                                     | 
                
                 | 
                        return $traverser;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    169
                 | 
                                    
                                                     | 
                
                 | 
                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    170
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    171
                 | 
                                    
                                                     | 
                
                 | 
                // End of file ModelObjNodeTreeDTO.php  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    172
                 | 
                                    
                                                     | 
                
                 | 
                // Location: EventEspresso\core\services\orm\tree_traversal/ModelObjNodeTreeDTO.php  | 
            
            
                                                        
            
                                    
            
            
                | 
                    173
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.