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<?php |
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namespace Maphper\DataSource; |
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class Database implements \Maphper\DataSource { |
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const EDIT_STRUCTURE = 1; |
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const EDIT_INDEX = 2; |
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const EDIT_OPTIMISE = 4; |
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private $table; |
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private $cache = []; |
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private $primaryKey; |
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private $fields = '*'; |
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private $defaultSort; |
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private $resultCache = []; |
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private $alterDb = false; |
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private $adapter; |
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private $crudBuilder; |
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public function __construct($db, $table, $primaryKey = 'id', array $options = []) { |
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$this->options = new DatabaseOptions($db, $options); |
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$this->adapter = $this->options->getAdapter(); |
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$this->table = $table; |
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$this->primaryKey = is_array($primaryKey) ? $primaryKey : [$primaryKey]; |
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$this->crudBuilder = new \Maphper\Lib\CrudBuilder(); |
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$this->selectBuilder = new \Maphper\Lib\SelectBuilder(); |
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$this->fields = implode(',', array_map([$this->adapter, 'quote'], (array) $this->options->read('fields'))); |
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$this->defaultSort = $this->options->read('defaultSort') !== false ? $this->options->read('defaultSort') : implode(', ', $this->primaryKey); |
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$this->alterDb = $this->options->getEditMode(); |
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if (self::EDIT_OPTIMISE & $this->alterDb && rand(0,500) == 1) $this->adapter->optimiseColumns($table); |
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} |
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public function getPrimaryKey() { |
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return $this->primaryKey; |
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} |
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public function deleteById($id) { |
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$this->adapter->query($this->crudBuilder->delete($this->table, [$this->primaryKey[0] . ' = :id'], [':id' => $id], 1)); |
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unset($this->cache[$id]); |
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} |
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public function findById($id) { |
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if (!isset($this->cache[$id])) { |
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try { |
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$result = $this->adapter->query($this->selectBuilder->select($this->table, [$this->getPrimaryKey()[0] . ' = :id'], [':id' => $id], ['limit' => 1])); |
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} |
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catch (\Exception $e) { |
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$this->errors[] = $e; |
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} |
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if (isset($result[0])) $this->cache[$id] = $result[0]; |
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else return null; |
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} |
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return $this->cache[$id]; |
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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 = $this->selectBuilder->createSql($criteria, \Maphper\Maphper::FIND_EXACT | \Maphper\Maphper::FIND_AND); |
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try { |
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$this->addIndex(array_keys($query['args'])); |
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$this->addIndex(explode(',', $group)); |
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$result = $this->adapter->query($this->selectBuilder->aggregate($this->table, $function, $field, $query['sql'], $query['args'], $group)); |
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if (isset($result[0]) && $group == null) return $result[0]->val; |
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else if ($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 return 0; |
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} |
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catch (\Exception $e) { |
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$this->errors[] = $e; |
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return $group ? [] : 0; |
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} |
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} |
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private function addIndex($args) { |
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if (self::EDIT_INDEX & $this->alterDb) $this->adapter->addIndex($this->table, $args); |
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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 (!isset($this->resultCache[$cacheId])) { |
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$query = $this->selectBuilder->createSql($fields, \Maphper\Maphper::FIND_EXACT | \Maphper\Maphper::FIND_AND); |
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if (!isset($options['order'])) $options['order'] = $this->defaultSort; |
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$query['sql'] = array_filter($query['sql']); |
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try { |
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$this->resultCache[$cacheId] = $this->adapter->query($this->selectBuilder->select($this->table, $query['sql'], $query['args'], $options)); |
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$this->addIndex(array_keys($query['args'])); |
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$this->addIndex(explode(',', $options['order'])); |
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} |
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catch (\Exception $e) { |
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$this->errors[] = $e; |
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$this->resultCache[$cacheId] = []; |
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} |
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} |
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return $this->resultCache[$cacheId]; |
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} |
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public function deleteByField(array $fields, array $options = [], $mode = null) { |
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if ($mode == null) $mode = \Maphper\Maphper::FIND_EXACT | \Maphper\Maphper::FIND_AND; |
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if (isset($options['limit']) != null) $limit = ' LIMIT ' . $options['limit']; |
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else $limit = ''; |
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$query = $this->selectBuilder->createSql($fields, $mode); |
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$query['sql'] = array_filter($query['sql']); |
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$this->adapter->query($this->crudBuilder->delete($this->table, $query['sql'], $query['args'], $limit)); |
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$this->addIndex(array_keys($query['args'])); |
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//Clear the cache |
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$this->cache = []; |
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$this->resultCache = []; |
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} |
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private function getIfNew($data) { |
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$new = false; |
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foreach ($this->primaryKey as $k) { |
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if (empty($data->$k)) { |
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$data->$k = null; |
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$new = true; |
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} |
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} |
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return $new; |
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} |
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public function save($data, $tryagain = true) { |
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$tryagain = $tryagain && self::EDIT_STRUCTURE & $this->alterDb; |
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$new = $this->getIfNew($data); |
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try { |
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$result = $this->insert($this->table, $this->primaryKey, $data); |
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//If there was an error but PDO is silent, trigger the catch block anyway |
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if ($result->errorCode() !== '00000') throw new \Exception('Could not insert into ' . $this->table); |
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} |
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catch (\Exception $e) { |
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if ($tryagain) { |
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$this->adapter->alterDatabase($this->table, $this->primaryKey, $data); |
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$this->save($data, false); |
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} |
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else throw $e; |
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} |
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if ($new && count($this->primaryKey) == 1) $data->{$this->primaryKey[0]} = $this->adapter->lastInsertId(); |
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//Something has changed, clear any cached results as they may now be incorrect |
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$this->resultCache = []; |
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$this->updateCache($data); |
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} |
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private function checkIfUpdateWorked($data) { |
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$updateWhere = $this->crudBuilder->update($this->table, $this->primaryKey, $data); |
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$matched = $this->findByField($updateWhere->getArgs()); |
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if (count($matched) == 0) throw new \InvalidArgumentException('Record inserted into table ' . $this->table . ' fails table constraints'); |
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} |
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private function updateCache($data) { |
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$pkValue = $data->{$this->primaryKey[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] = $data; |
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} |
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private function insert($table, array $primaryKey, $data) { |
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$error = 0; |
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try { |
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$result = $this->adapter->query($this->crudBuilder->insert($table, $data)); |
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} |
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catch (\Exception $e) { |
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$error = 1; |
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} |
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if ($error || $result->errorCode() !== '00000') { |
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$result = $this->adapter->query($this->crudBuilder->update($table, $primaryKey, $data)); |
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} |
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if ($result->rowCount() === 0) $this->checkIfUpdateWorked($data); |
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return $result; |
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} |
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} |
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Level-2 /
Maphper
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