namespace pq\Gateway;
use \pq\Query\Writer as QueryWriter;
+use \pq\Query\Executor as QueryExecutor;
class Table
{
*/
public static $defaultConnection;
+ /**
+ * @var callable
+ */
+ public static $defaultResolver;
+
+ /**
+ * @var \pq\Gateway\Table\CacheInterface
+ */
+ public static $defaultMetadataCache;
+
/**
* @var \pq\Connection
*/
* @var string
*/
protected $rowset = "\\pq\\Gateway\\Rowset";
+
+ /**
+ * @var \pq\Query\WriterIterface
+ */
+ protected $query;
+
+ /**
+ * @var \pq\Query\ExecutorInterface
+ */
+ protected $exec;
+
+ /**
+ * @var \pq\Gateway\Table\Relations
+ */
+ protected $relations;
+
+ /**
+ * @var \pq\Gateway\Table\CacheInterface
+ */
+ protected $metadataCache;
+
+ /**
+ * @param string $table
+ * @return \pq\Gateway\Table
+ */
+ public static function resolve($table) {
+ if ($table instanceof Table) {
+ return $table;
+ }
+ if (is_callable(static::$defaultResolver)) {
+ if (($resolved = call_user_func(static::$defaultResolver, $table))) {
+ return $resolved;
+ }
+ }
+ return new Table($table);
+ }
/**
* @param string $name
* @param \pq\Connection $conn
+ * @param array $dependents
*/
function __construct($name, \pq\Connection $conn = null) {
$this->name = $name;
$this->conn = $conn ?: static::$defaultConnection ?: new \pq\Connection;
}
+ /**
+ * Get the complete PostgreSQL connection string
+ * @return string
+ */
+ function __toString() {
+ return sprintf("postgresql://%s:%s@%s:%d/%s?%s#%s",
+ $this->conn->user,
+ $this->conn->pass,
+ $this->conn->host,
+ $this->conn->port,
+ $this->conn->db,
+ $this->conn->options,
+ $this->getName()
+ );
+ }
+
/**
* Set the rowset prototype
* @param mixed $rowset
return $this;
}
+ /**
+ * Get the rowset prototype
+ * @return mixed
+ */
+ function getRowsetPrototype() {
+ return $this->rowset;
+ }
+
+ /**
+ * Set the query writer
+ * @param \pq\Query\WriterInterface $query
+ * @return \pq\Gateway\Table
+ */
+ function setQueryWriter(\pq\Query\WriterInterface $query) {
+ $this->query = $query;
+ return $this;
+ }
+
+ /**
+ * Get the query writer
+ * @return \pq\Query\WriterInterface
+ */
+ function getQueryWriter() {
+ if (!$this->query) {
+ $this->query = new QueryWriter;
+ }
+ return $this->query;
+ }
+
+ /**
+ * Set the query executor
+ * @param \pq\Query\ExecutorInterface $exec
+ * @return \pq\Gateway\Table
+ */
+ function setQueryExecutor(\pq\Query\ExecutorInterface $exec) {
+ $this->exec = $exec;
+ return $this;
+ }
+
+ /**
+ * Get the query executor
+ * @return \pq\Query\ExecutorInterface
+ */
+ function getQueryExecutor() {
+ if (!$this->exec) {
+ $this->exec = new QueryExecutor($this->conn);
+ }
+ return $this->exec;
+ }
+
+ /**
+ * Get the metadata cache
+ * @return \pq\Gateway\Table\CacheInterface
+ */
+ function getMetadataCache() {
+ if (!isset($this->metadatCache)) {
+ $this->metadataCache = static::$defaultMetadataCache ?: new Table\StaticCache;
+ }
+ return $this->metadataCache;
+ }
+
+ /**
+ * Set the metadata cache
+ * @param \pq\Gateway\Table\CacheInterface $cache
+ */
+ function setMetadataCache(Table\CacheInterface $cache) {
+ $this->metadataCache = $cache;
+ return $this;
+ }
+
+ /**
+ * Get foreign key relations
+ * @param string $to fkey
+ * @return \pq\Gateway\Table\Relations|stdClass
+ */
+ function getRelations($to = null) {
+ if (!isset($this->relations)) {
+ $this->relations = new Table\Relations($this);
+ }
+ if (isset($to)) {
+ if (!isset($this->relations->$to)) {
+ return null;
+ }
+ return $this->relations->$to;
+ }
+ return $this->relations;
+ }
+
+ /**
+ * Check whether a certain relation exists
+ * @param string $name
+ * @param string $table
+ * @return bool
+ */
+ function hasRelation($name, $table = null) {
+ if (!($rel = $this->getRelations($name))) {
+ return false;
+ }
+ if (!isset($table)) {
+ return true;
+ }
+ return isset($rel->$table);
+ }
+
/**
* @return \pq\Connection
*/
/**
* Execute the query
- * @param \pq\Query\Writer $query
+ * @param \pq\Query\WriterInterface $query
* @return mixed
*/
protected function execute(QueryWriter $query) {
- $result = $query->exec($this->conn);
-
- if ($result->status != \pq\Result::TUPLES_OK) {
+ return $this->getQueryExecutor()->execute($query, array($this, "onResult"));
+ }
+
+ /**
+ * Retreives the result of an executed query
+ * @param \pq\Result $result
+ * @return mixed
+ */
+ public function onResult(\pq\Result $result = null) {
+ if ($result && $result->status != \pq\Result::TUPLES_OK) {
return $result;
}
- if (is_callable($this->rowset)) {
- return call_user_func($this->rowset, $result);
- }
-
- if ($this->rowset) {
- $rowset = $this->rowset;
+ $rowset = $this->getRowsetPrototype();
+ if (is_callable($rowset)) {
+ return $rowset($result);
+ } elseif ($rowset) {
return new $rowset($this, $result);
}
return $result;
}
-
+
/**
* Find rows in the table
* @param array $where
* @param array|string $order
* @param int $limit
* @param int $offset
- * @return \pq\Result
+ * @return mixed
*/
function find(array $where = null, $order = null, $limit = 0, $offset = 0) {
- $query = new QueryWriter("SELECT * FROM ". $this->conn->quoteName($this->name));
+ $query = $this->getQueryWriter()->reset();
+ $query->write("SELECT * FROM", $this->conn->quoteName($this->name));
if ($where) {
$query->write("WHERE")->criteria($where);
}
$query->write("OFFSET", $offset);
return $this->execute($query);
}
+
+ /**
+ * Get the child rows of a row by foreign key
+ * @param \pq\Gateway\Row $foreign
+ * @param string $name optional fkey name
+ * @param string $order
+ * @param int $limit
+ * @param int $offset
+ * @return mixed
+ */
+ function of(Row $foreign, $name = null, $order = null, $limit = 0, $offset = 0) {
+ // select * from $this where $this->$foreignColumn = $foreign->$referencedColumn
+
+ if (!isset($name)) {
+ $name = $this->getName();
+ }
+
+ if (!$foreign->getTable()->hasRelation($name, $this->getName())) {
+ return $this->onResult(null);
+ }
+ $rel = $foreign->getTable()->getRelations($name)->{$this->getName()};
+
+ return $this->find(
+ array($rel->foreignColumn . "=" => $foreign->{$rel->referencedColumn}),
+ $order, $limit, $offset
+ );
+ }
+
+ /**
+ * Get the parent rows of a row by foreign key
+ * @param \pq\Gateway\Row $me
+ * @param string $foreign
+ * @param string $order
+ * @param int $limit
+ * @param int $offset
+ * @return mixed
+ */
+ function by(Row $me, $foreign, $order = null, $limit = 0, $offset = 0) {
+ // select * from $foreign where $foreign->$referencedColumn = $me->$foreignColumn
+
+ if (!$this->hasRelation($foreign, $this->getName())) {
+ return $this->onResult(null);
+ }
+ $rel = $this->getRelations($foreign)->{$this->getName()};
+
+ return static::resolve($rel->referencedTable)->find(
+ array($rel->referencedColumn . "=" => $me->{$rel->foreignColumn}),
+ $order, $limit, $offset
+ );
+ }
/**
* Insert a row into the table
* @param array $data
* @param string $returning
- * @return \pq\Result
+ * @return mixed
*/
function create(array $data = null, $returning = "*") {
- $query = new QueryWriter("INSERT INTO ".$this->conn->quoteName($this->name));
+ $query = $this->getQueryWriter()->reset();
+ $query->write("INSERT INTO", $this->conn->quoteName($this->name));
if ($data) {
$first = true;
$params = array();
* @param array $where
* @param array $data
* @param string $returning
- * @retunr \pq\Result
+ * @retunr mixed
*/
function update(array $where, array $data, $returning = "*") {
- $query = new QueryWriter("UPDATE ".$this->conn->quoteName($this->name));
+ $query = $this->getQueryWriter()->reset();
+ $query->write("UPDATE", $this->conn->quoteName($this->name));
$first = true;
- $params = array();
foreach ($data as $key => $val) {
$query->write($first ? "SET" : ",", $key, "=", $query->param($val));
$first and $first = false;
* Delete rows from the table
* @param array $where
* @param string $returning
- * @return pq\Result
+ * @return mixed
*/
function delete(array $where, $returning = null) {
- $query = new QueryWriter("DELETE FROM ".$this->conn->quoteName($this->name));
+ $query = $this->getQueryWriter()->reset();
+ $query->write("DELETE FROM", $this->conn->quoteName($this->name));
$query->write("WHERE")->criteria($where);
if (strlen($returning)) {
$query->write("RETURNING", $returning);
projects / m6w6 / pq-gateway / blobdiff