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<?php |
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namespace Tarantool\Mapper; |
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use Exception; |
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class Schema |
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{ |
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private $mapper; |
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private $names = []; |
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private $spaces = []; |
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private $params = []; |
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public function __construct(Mapper $mapper, $meta = null) |
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{ |
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$this->mapper = $mapper; |
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if ($meta) { |
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$this->setMeta($meta); |
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} else { |
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$this->reset(); |
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} |
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} |
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public function createSpace($space, $config = []) |
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{ |
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$engine = 'memtx'; |
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if (array_key_exists('properties', $config)) { |
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if (array_key_exists('engine', $config)) { |
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$engine = $config['engine']; |
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if (!in_array($engine, ['memtx', 'vinyl'])) { |
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throw new Exception("Invalid engine $engine"); |
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} |
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} |
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} |
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$id = $this->mapper->getClient()->evaluate(" |
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box.schema.space.create('$space', { |
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engine = '$engine' |
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}) |
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return box.space.$space.id |
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")->getData()[0]; |
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$this->names[$space] = $id; |
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$this->engines[$space] = $engine; |
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$this->spaces[$id] = new Space($this->mapper, $id, $space, $engine); |
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$properties = array_key_exists('properties', $config) ? $config['properties'] : $config; |
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if ($properties) { |
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$this->spaces[$id]->addProperties($properties); |
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} |
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return $this->spaces[$id]; |
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} |
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public function getDefaultValue($type) |
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{ |
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switch ($type) { |
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case 'STR': |
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case 'STRING': |
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case 'str': |
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case 'string': |
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return (string) null; |
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case 'double': |
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case 'float': |
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case 'number': |
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return (float) null; |
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case 'unsigned': |
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case 'UNSIGNED': |
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case 'num': |
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case 'NUM': |
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return (int) null; |
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} |
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throw new Exception("Invalid type $type"); |
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} |
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public function formatValue($type, $value) |
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{ |
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if (is_null($value)) { |
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return null; |
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} |
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switch ($type) { |
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case 'STR': |
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case 'STRING': |
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case 'str': |
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case 'string': |
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return (string) $value; |
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case 'double': |
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case 'float': |
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case 'number': |
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return (float) $value; |
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case 'unsigned': |
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case 'UNSIGNED': |
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case 'num': |
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case 'NUM': |
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return (int) $value; |
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default: |
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return $value; |
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} |
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} |
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public function getSpace($id) |
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{ |
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if (is_string($id)) { |
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return $this->getSpace($this->getSpaceId($id)); |
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} |
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if (!$id) { |
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throw new Exception("Space id or name not defined"); |
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} |
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if (!array_key_exists($id, $this->spaces)) { |
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$name = array_search($id, $this->names); |
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$meta = array_key_exists($id, $this->params) ? $this->params[$id] : null; |
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$engine = $this->engines[$name]; |
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$this->spaces[$id] = new Space($this->mapper, $id, $name, $engine, $meta); |
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} |
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return $this->spaces[$id]; |
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} |
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public function getSpaceId($name) |
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{ |
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if (!$this->hasSpace($name)) { |
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throw new Exception("No space $name"); |
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} |
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return $this->names[$name]; |
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} |
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public function getSpaces() |
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{ |
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foreach ($this->names as $id) { |
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$this->getSpace($id); |
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} |
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return $this->spaces; |
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} |
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public function hasSpace($name) |
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{ |
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return array_key_exists($name, $this->names); |
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} |
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public function once($name, $callback) |
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{ |
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$key = 'mapper-once' . $name; |
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$rows = $this->mapper->find('_schema', ['key' => $key]); |
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if (!count($rows)) { |
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$this->mapper->create('_schema', ['key' => $key]); |
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return $callback($this->mapper); |
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} |
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} |
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public function reset() |
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{ |
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[$this->names, $this->engines] = $this->mapper->getClient()->evaluate(" |
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local spaces = {} |
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local engines = {} |
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local i, s |
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for i, s in box.space._vspace:pairs() do |
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spaces[s[3]] = s[1] |
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engines[s[3]] = s[4] |
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end |
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return spaces, engines |
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")->getData(); |
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} |
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public function getMeta() |
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{ |
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$params = []; |
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foreach ($this->getSpaces() as $space) { |
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$params[$space->getId()] = $space->getMeta(); |
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} |
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return [ |
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'engines' => $this->engines, |
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'names' => $this->names, |
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'params' => $params, |
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]; |
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} |
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public function setMeta($meta) |
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{ |
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$this->engines = $meta['engines']; |
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$this->names = $meta['names']; |
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$this->params = $meta['params']; |
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} |
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private $underscores = []; |
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public function toUnderscore($input) |
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{ |
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if (!array_key_exists($input, $this->underscores)) { |
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preg_match_all('!([A-Z][A-Z0-9]*(?=$|[A-Z][a-z0-9])|[A-Za-z][a-z0-9]+)!', $input, $matches); |
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$ret = $matches[0]; |
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foreach ($ret as &$match) { |
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$match = $match == strtoupper($match) ? strtolower($match) : lcfirst($match); |
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} |
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$this->underscores[$input] = implode('_', $ret); |
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} |
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return $this->underscores[$input]; |
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} |
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private $camelcase = []; |
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public function toCamelCase($input) |
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{ |
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if (!array_key_exists($input, $this->camelcase)) { |
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$this->camelcase[$input] = lcfirst(implode('', array_map('ucfirst', explode('_', $input)))); |
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} |
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return $this->camelcase[$input]; |
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} |
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} |
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: