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<?php |
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namespace Maphper\DataSource; |
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class DatabaseSelect { |
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private $resultCache = []; |
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private $idCache = []; |
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private $idCacheTime = []; |
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private $selectBuilder; |
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private $whereBuilder; |
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private $adapter; |
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private $databaseModify; |
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private $defaultSort; |
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private $table; |
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public function __construct(DatabaseAdapter $adapter, DatabaseModify $databaseModify, $table, $defaultSort, $cacheMode) { |
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$this->adapter = $adapter; |
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$this->databaseModify = $databaseModify; |
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$this->selectBuilder = new \Maphper\Lib\SelectBuilder(); |
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$this->whereBuilder = new \Maphper\Lib\Sql\WhereBuilder(); |
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$this->defaultSort = $defaultSort; |
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$this->cacheMode = $cacheMode; |
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$this->table = $table; |
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} |
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private function cacheUpdateRequired($id) { |
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if ($this->cacheMode > 0) { |
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if (!isset($this->idCacheTime[$id])) return true; // Cache time has not been set for first time |
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if (time() - $this->idCacheTime[$id] > $this->cacheMode) return true; // Cache time has expired |
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} |
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if (!isset($this->idCache[$id])) return true; // Cache has not been set for first time |
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return false; |
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} |
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public function findById($id, $pk) { |
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if ($this->cacheMode < 0 || $this->cacheUpdateRequired($id)) { |
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try { |
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$result = $this->selectQuery($this->selectBuilder->select($this->table, $pk . ' = :id', [':id' => $id], ['limit' => 1])); |
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} |
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catch (\Exception $e) { |
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// Don't issue an error if it cannot be found since we return null |
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} |
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if (isset($result[0])) $result = $result[0]; |
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else return null; |
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} |
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if ($this->cacheMode < 0) return $result; // Cache mode is off |
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if ($this->cacheUpdateRequired()) { |
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$this->idCache[$id] = $result; |
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$this->idCacheTime[$id] = time(); |
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} |
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return $this->idCache[$id]; |
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} |
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public function findByField(array $fields, $options = []) { |
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$cacheId = md5(serialize(func_get_args())); |
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if ($this->cacheMode < 0 || $this->cacheUpdateRequired($cacheId)) { |
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$query = $this->whereBuilder->createSql($fields); |
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if (!isset($options['order'])) $options['order'] = $this->defaultSort; |
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try { |
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$result = $this->selectQuery($this->selectBuilder->select($this->table, $query['sql'], $query['args'], $options)); |
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$this->databaseModify->addIndex(array_keys($query['args'])); |
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$this->databaseModify->addIndex(explode(',', $options['order'])); |
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} |
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catch (\Exception $e) { |
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$this->errors[] = $e; |
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$result = []; |
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} |
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} |
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if ($this->cacheMode < 0) return $result; // Cache mode is off |
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if ($this->cacheUpdateRequired($cacheId)) { |
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$this->idCache[$cacheId] = $result; |
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$this->idCacheTime[$cacheId] = time(); |
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} |
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return $this->idCache[$cacheId]; |
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} |
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public function findAggregate($function, $field, $group = null, array $criteria = [], array $options = []) { |
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//Cannot count/sum/max multiple fields, pick the first one. This should only come into play when trying to count() a mapper with multiple primary keys |
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if (is_array($field)) $field = $field[0]; |
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$query = $this->whereBuilder->createSql($criteria); |
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try { |
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$this->databaseModify->addIndex(array_keys($query['args'])); |
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$this->databaseModify->addIndex(explode(',', $group)); |
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$result = $this->selectQuery($this->selectBuilder->aggregate($this->table, $function, $field, $query['sql'], $query['args'], $group)); |
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return $this->determineAggregateResult($result, $group, $field); |
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} |
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catch (\Exception $e) { |
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return $group ? [] : 0; |
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} |
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} |
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private function determineAggregateResult($result, $group, $field) { |
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if ($group != null) { |
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$ret = []; |
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foreach ($result as $res) $ret[$res->$field] = $res->val; |
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return $ret; |
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} |
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else if (isset($result[0])) return $result[0]->val; |
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else return 0; |
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} |
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private function selectQuery(\Maphper\Lib\Query $query) { |
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return $this->adapter->query($query)->fetchAll(\PDO::FETCH_OBJ); |
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} |
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public function clearResultCache() { |
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if ($this->cacheMode >= 0) $this->resultCache = []; |
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} |
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public function clearIDCache() { |
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if ($this->cacheMode >= 0) $this->idCache = []; |
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} |
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public function updateCache($data, $pkValue) { |
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if ($this->cacheMode >= 0) { |
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if (isset($this->cache[$pkValue])) $this->cache[$pkValue] = (object) array_merge((array)$this->cache[$pkValue], (array)$data); |
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else $this->cache[$pkValue] = $data; |
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} |
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} |
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public function deleteIDFromCache($id) { |
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if ($this->cacheMode >= 0) { |
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unset($this->idCache[$id]); |
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unset($this->idCacheTime[$id]); |
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} |
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} |
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} |
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Level-2 /
Maphper
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