<?php

Lib::loadClass('Core_StorageObject');
Lib::loadClass('Core_StorageField');

class Core_StorageBase {

	protected $_zasob_id = 0;
	protected $_cache = array();

	public function __construct($pdo) {
		throw new Exception("Storage constructor not defined");
	}

	public function fetchAllAssoc($sql) {
		throw new Exception("Storage " . __FUNCTION__ . " not defined");
	}

	public function getZasobId() {
		return $this->_zasob_id;
	}

	public function getType() {
		return $this->_pdo->getType();
	}

	public function getObject($tableName) {
		$storageZasobId = $this->getZasobId();
		$storageObject = new Core_StorageObject("{$storageZasobId}/{$tableName}");
		$tableStruct = $this->getTableStruct($tableName);
		$pkFieldName = null;
		foreach ($tableStruct as $fldName => $vFldType) {
			$vField = new Core_StorageField("{$storageZasobId}/{$tableName}/{$fldName}");
			$vField->setName($fldName);
			$storageObject->setField($vField);
			if ($vFldType->isPrimaryKey()) {
				$pkFieldName = $fldName;
			}
		}
		if ($pkFieldName) {
			$storageObject->setPrimaryKeyFieldName($pkFieldName);
		}
		return $storageObject;
	}

	public function getTableStruct($tableName) {
		$storageZasobId = $this->getZasobId();
		$tblUri = "{$storageZasobId}/{$tableName}";
		if (!array_key_exists($tblUri, $this->_cache)) {
			$this->_cache[$tblUri] = $this->_getTableStruct($tableName);
		}
		return $this->_cache[$tblUri];
	}

	protected function _getTableStruct($tableName) {
		throw new Exception("Storage " . __FUNCTION__ . " not defined");
	}

	public function getTableStructRaw($tableName) {
		throw new Exception("Storage " . __FUNCTION__ . " not defined");
	}

	public function getTableList() {
		throw new Exception("Storage " . __FUNCTION__ . " not defined");
	}

	public function getViewStruct($viewName) {
		throw new Exception("Storage " . __FUNCTION__ . " not defined");
	}

	public function getViewStructRaw($viewName) {
		throw new Exception("Storage " . __FUNCTION__ . " not defined");
	}

	public function getViewList() {
		throw new Exception("Storage " . __FUNCTION__ . " not defined");
	}

	public function getTableListWithInfo() {
		throw new Exception("Storage " . __FUNCTION__ . " not defined");
	}

}