namespace pq\Gateway;
+use \pq\Query\Expr as QueryExpr;
use \pq\Query\Writer as QueryWriter;
use \pq\Query\Executor as QueryExecutor;
-class Table
+class Table implements \SplSubject
{
/**
* @var \pq\Connection
*/
public static $defaultConnection;
+ /**
+ * @var callable
+ */
+ public static $defaultResolver;
+
+ /**
+ * @var \pq\Gateway\Table\CacheInterface
+ */
+ public static $defaultMetadataCache;
+
/**
* @var \pq\Connection
*/
* @var \pq\Query\ExecutorInterface
*/
protected $exec;
-
+
/**
- * @var array
+ * @var \pq\Gateway\Table\Identity
*/
- protected $dependents;
+ protected $identity;
+ /**
+ * @var \pq\Gateway\Table\Attributes
+ */
+ protected $attributes;
+
+ /**
+ * @var \pq\Gateway\Table\Relations
+ */
+ protected $relations;
+
+ /**
+ * @var \pq\Gateway\Table\CacheInterface
+ */
+ protected $metadataCache;
+
+ /**
+ * @var \SplObjectStorage
+ */
+ protected $observers;
+
+ /**
+ * @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, array $dependents = array()) {
- $this->name = $name;
+ function __construct($name = null, \pq\Connection $conn = null) {
+ if (isset($name)) {
+ $this->name = $name;
+ } elseif (!isset($this->name)) {
+ throw new \InvalidArgumentException("Table must have a name");
+ }
$this->conn = $conn ?: static::$defaultConnection ?: new \pq\Connection;
- $this->dependents = $dependents;
+ $this->observers = new \SplObjectStorage;
+ }
+
+ /**
+ * Get the complete PostgreSQL connection string
+ * @return string
+ */
+ function __toString() {
+ return (string) sprintf("postgresql://%s:%s@%s:%d/%s#%s",
+ $this->conn->user,
+ $this->conn->pass,
+ $this->conn->host,
+ $this->conn->port,
+ $this->conn->db,
+ $this->getName()
+ );
}
/**
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 $this;
+ }
+
+ /**
+ * Get the primary key
+ * @return \pq\Gateway\Table\Identity
+ */
+ function getIdentity() {
+ if (!isset($this->identity)) {
+ $this->identity = new Table\Identity($this);
+ }
+ return $this->identity;
+ }
+
+ /**
+ * Get the table attribute definition (column list)
+ * @return \pq\Table\Attributes
+ */
+ function getAttributes() {
+ if (!isset($this->attributes)) {
+ $this->attributes = new Table\Attributes($this);
+ }
+ return $this->attributes;
+ }
+
+ /**
+ * Get foreign key relations
+ * @return \pq\Gateway\Table\Relations
+ */
+ function getRelations() {
+ if (!isset($this->relations)) {
+ $this->relations = new Table\Relations($this);
+ }
+ return $this->relations;
+ }
+
+ /**
+ * Get a foreign key relation
+ * @param string $table
+ * @param string $ref
+ * @return \pq\Gateway\Table\Reference
+ */
+ function getRelation($table, $ref = null) {
+ return $this->getRelations()->getReference($table, $ref);
+ }
+
/**
* @return \pq\Connection
*/
return $this->name;
}
+ /**
+ * Attach an observer
+ * @param \SplObserver
+ * @return \pq\Gateway\Table
+ */
+ function attach(\SplObserver $observer) {
+ $this->observers->attach($observer);
+ return $this;
+ }
+
+ /**
+ * Detach an observer
+ * @param \SplObserver
+ * @return \pq\Gateway\Table
+ */
+ function detach(\SplObserver $observer) {
+ $this->observers->attach($observer);
+ return $this;
+ }
+
+ /**
+ * Implements \SplSubject
+ */
+ function notify(\pq\Gateway\Row $row = null, $event = null, array &$where = null) {
+ foreach ($this->observers as $observer) {
+ $observer->update($this, $row, $event, $where);
+ }
+ }
+
/**
* Execute the query
* @param \pq\Query\WriterInterface $query
* @param \pq\Result $result
* @return mixed
*/
- public function onResult(\pq\Result $result) {
- if ($result->status != \pq\Result::TUPLES_OK) {
+ public function onResult(\pq\Result $result = null) {
+ if ($result && $result->status != \pq\Result::TUPLES_OK) {
return $result;
}
* @param array|string $order
* @param int $limit
* @param int $offset
+ * @param string $lock
* @return mixed
*/
- function find(array $where = null, $order = null, $limit = 0, $offset = 0) {
+ function find(array $where = null, $order = null, $limit = 0, $offset = 0, $lock = null) {
$query = $this->getQueryWriter()->reset();
$query->write("SELECT * FROM", $this->conn->quoteName($this->name));
if ($where) {
if ($limit) {
$query->write("LIMIT", $limit);
}
- $query->write("OFFSET", $offset);
+ if ($offset) {
+ $query->write("OFFSET", $offset);
+ }
+ if ($lock) {
+ $query->write("FOR", $lock);
+ }
return $this->execute($query);
}
/**
- * Get the parent row of a row by foreign key
- * @param \pq\Gateway\Row $dependent
- * @param string $name optional fkey name
+ * Get the child rows of a row by foreign key
+ * @param \pq\Gateway\Row $foreign
+ * @param string $ref optional fkey name
* @param string $order
* @param int $limit
* @param int $offset
* @return mixed
*/
- function of(Row $dependent, $name = null, $order = null, $limit = 0, $offset = 0) {
- if (!$name) {
- $name = $dependent->getTable()->getName();
+ function of(Row $foreign, $ref = null, $order = null, $limit = 0, $offset = 0) {
+ // select * from $this where $this->$foreignColumn = $foreign->$referencedColumn
+
+ if (!($rel = $this->getRelation($foreign->getTable()->getName(), $ref))) {
+ return $this->onResult(null);
+ }
+
+ $where = array();
+ foreach ($rel as $key => $ref) {
+ $where["$key="] = $foreign->$ref;
+ }
+
+ return $this->find($where, $order, $limit, $offset);
+ }
+
+ /**
+ * Get the parent rows of a row by foreign key
+ * @param \pq\Gateway\Row $foreign
+ * @param string $ref
+ * @return mixed
+ */
+ function by(Row $foreign, $ref = null) {
+ // select * from $this where $this->$referencedColumn = $me->$foreignColumn
+
+ if (!($rel = $foreign->getTable()->getRelation($this->getName(), $ref))) {
+ return $this->onResult(null);
+ }
+
+ $where = array();
+ foreach ($rel as $key => $ref) {
+ $where["$ref="] = $foreign->$key;
}
- return $this->find(array("{$name}_id=" => $dependent->id),
- $order, $limit, $offset);
+ return $this->find($where);
}
/**
- * Get the child rows of a row by foreign key
- * @param \pq\Gateway\Row $me
- * @param string $dependent
+ * Get rows dependent on other rows by foreign keys
+ * @param array $relations
+ * @param array $where
* @param string $order
* @param int $limit
* @param int $offset
* @return mixed
- * @throws \LogicException
*/
- function by(Row $me, $dependent, $order = null, $limit = 0, $offset = 0) {
- if (!isset($this->dependents[$dependent])) {
- throw new \LogicException("Unknown dependent table $dependent");
+ function with(array $relations, array $where = null, $order = null, $limit = 0, $offset = 0) {
+ $qthis = $this->conn->quoteName($this->getName());
+ $query = $this->getQueryWriter()->reset();
+ $query->write("SELECT", "$qthis.*", "FROM", $qthis);
+ foreach ($relations as $relation) {
+ if (!($relation instanceof Table\Reference)) {
+ $relation = static::resolve($relation)->getRelation($this->getName());
+ }
+ if ($this->getName() === $relation->foreignTable) {
+ $query->write("JOIN", $relation->referencedTable)->write("ON");
+ foreach ($relation as $key => $ref) {
+ $query->criteria(
+ array(
+ "{$relation->referencedTable}.{$ref}=" =>
+ new QueryExpr("{$relation->foreignTable}.{$key}")
+ )
+ );
+ }
+ } else {
+ $query->write("JOIN", $relation->foreignTable)->write("ON");
+ foreach ($relation as $key => $ref) {
+ $query->criteria(
+ array(
+ "{$relation->referencedTable}.{$ref}=" =>
+ new QueryExpr("{$relation->foreignTable}.{$key}")
+ )
+ );
+ }
+ }
}
-
- $dependentClass = $this->dependents[$dependent];
- $dependentModel = new $dependentClass($this->conn);
- return $dependentModel->of($me, null, $order, $limit, $offset);
+ if ($where) {
+ $query->write("WHERE")->criteria($where);
+ }
+ if ($order) {
+ $query->write("ORDER BY", $order);
+ }
+ if ($limit) {
+ $query->write("LIMIT", $limit);
+ }
+ if ($offset) {
+ $query->write("OFFSET", $offset);
+ }
+ return $this->execute($query);
}
/**
$params = array();
foreach ($data as $key => $val) {
$query->write($first ? "(" : ",", $key);
- $params[] = $query->param($val);
+ $params[] = $query->param($val, $this->getAttributes()->getColumn($key)->type);
$first and $first = false;
}
$query->write(") VALUES (", $params, ")");
$query->write("UPDATE", $this->conn->quoteName($this->name));
$first = true;
foreach ($data as $key => $val) {
- $query->write($first ? "SET" : ",", $key, "=", $query->param($val));
+ $query->write($first ? "SET" : ",", $key, "=",
+ $query->param($val, $this->getAttributes()->getColumn($key)->type));
$first and $first = false;
}
$query->write("WHERE")->criteria($where);
projects / m6w6 / pq-gateway / blobdiff