DataAccess/DataMapper/DataMapper.php

   1 <?php
   2
   3 namespace DataAccess\DataMapper;
   4
   5 use Domain\Entities\IDivineEntity;
   6 use DataAccess\IDatabaseFactory;
   7 use DataAccess\DataMapper\IDataMapper;
   8 use DataAccess\Queries\IQueryBuilder;
   9 use DataAccess\DataMapper\Helpers\AbstractPopulationHelper;
  10 use ReflectionClass;
  11
  12 class DataMapper implements IDataMapper
  13 {
  14     private $_db;
  15     private $_maps;
  16
  17     public function __construct($maps, IDatabaseFactory $databaseFactory)
  18     {
  19         $this->_db = $databaseFactory->createInstance();
  20         $this->_maps = include $maps;
  21     }
  22
  23     public function map($entityName, IQueryBuilder $queryBuilder)
  24     {
  25         $queryString = $queryBuilder->buildQuery();
  26
  27         $statement = $this->_db->prepare(sprintf($queryString,
  28             $this->_maps[$entityName]['table']
  29         ));
  30
  31         $statement->execute();
  32         $rows = $statement->fetchAll();
  33
  34         $entities = array();
  35
  36         foreach($rows as $row)
  37         {
  38             $className = $this->_maps[$entityName]['class']; //the entity to instantiate and return
  39             $constructors = AbstractPopulationHelper::getConstrutorArray($this->_maps, $entityName, $row, $this->_db);
  40
  41             if(count($constructors) == 0)
  42             {
  43                 $class = new $className;
  44             } else {
  45                 $r = new ReflectionClass($className);
  46                 $class = $r->newInstanceArgs($constructors);
  47             }
  48
  49             $class->setId($row['id']);
  50             $entities[$row['id']] = $class;
  51         }
  52
  53         return $entities;
  54     }
  55
  56     public function save(IDivineEntity $entity)
  57     {
  58         $queries = AbstractPopulationHelper::generateUpdateSaveQuery($this->_maps, $entity, $entity->getId(), $this->_db);
  59
  60         $flattened = array();
  61         $flattened_tables = array();
  62         foreach($queries as $index => $query)
  63         {
  64             $this_table = $query['table'];
  65             $this_columns = $query['columns'];
  66
  67             for($i = $index+1; $i<count($queries); $i++)
  68             {
  69                 if($queries[$i]['table'] == $this_table && !in_array($queries[$i]['table'], $flattened_tables) && !isset($query['id'])) //only merge create queries, updates are fine to run multiple times
  70                 {
  71                     $this_columns = array_merge($this_columns, $queries[$i]['columns']);
  72                 }
  73             }
  74
  75             if(!in_array($this_table, $flattened_tables))
  76             {
  77                 $flattened_tables[] = $this_table;
  78                 $prepared = isset($query['prepared']) ? $query['prepared'] : null;
  79                 $id = isset($query['id']) ? $query['id'] : null;
  80                 $flattened[] = array('columns' => $this_columns, 'table' => $this_table, 'prepared' => $prepared, 'id' => $id);
  81             }
  82         }
  83
  84         $queries = array();
  85
  86         foreach($flattened as $info)
  87         {
  88             if(isset($info['id']))
  89             {
  90                 $query = $info['prepared'];
  91                 $query = substr($query, 0, -2);
  92                 $query .= sprintf(' WHERE id=%u', $info['id']);
  93             } else {
  94                 $query = sprintf('INSERT INTO %s (%s) VALUES (%s)',
  95                 $info['table'],
  96                 implode(', ', array_keys($info['columns'])),
  97                 implode(', ', $info['columns']));
  98             }
  99
 100             $queries[] = $query;
 101         }
 102
 103        // if($queries['TYPE'] == AbstractPopulationHelper::QUERY_TYPE_CREATE)
 104        // {
 105             $idMap = [];
 106             foreach($queries as $index => $query)
 107             {
 108                 $runQuery = true;
 109                 if (preg_match_all('/'.preg_quote('%').'(.*?)'.preg_quote('%').'/s', $query, $matches)) {
 110                     foreach($matches[1] as $index_ref)
 111                     {
 112                         if($index_ref != 'MAIN_QUERY_ID')
 113                         {
 114                             $index_id = str_replace('INDEX_REF_', '', $index_ref);
 115                             $query = str_replace('%INDEX_REF_' . $index_id . '%', $idMap['INDEX_REF_' . $index_id], $query);
 116                         } else {
 117                             $runQuery = false;
 118                         }
 119                     }
 120                 }
 121
 122                 if($runQuery)
 123                 {
 124                     $statement = $this->_db->prepare($query);
 125                     $statement->execute();
 126                     $refIndex = $index+1;
 127                     $idMap['INDEX_REF_' . $refIndex] = $this->_db->lastInsertId();
 128                     unset($queries[$index]);
 129                 } else {
 130                     //update query so that other references are resolved.
 131                     $queries[$index] = $query;
 132                 }
 133             }
 134
 135             //at this point we have queries left that depend on the main query id
 136             foreach($queries as $query)
 137             {
 138                 $query = str_replace('%MAIN_QUERY_ID%', end($idMap), $query);
 139                 echo $query;
 140                 $statement = $this->_db->prepare($query);
 141                 $statement->execute();
 142             }
 143         //}
 144
 145         $entity->setId(end($idMap));
 146
 147         return $entity;
 148     }
 149
 150     //TODO: Implement
 151     public function remove(IDivineEntity $entity) {
 152         ;
 153     }
 154 }