518 lines
13 KiB
PHP
518 lines
13 KiB
PHP
<?php
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/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
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namespace Icinga\Module\Monitoring\DataView;
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use IteratorAggregate;
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use Icinga\Data\QueryInterface;
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use Icinga\Data\Filter\Filter;
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use Icinga\Data\Filter\FilterMatch;
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use Icinga\Data\PivotTable;
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use Icinga\Data\ConnectionInterface;
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use Icinga\Exception\QueryException;
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use Icinga\Web\Request;
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use Icinga\Web\Url;
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use Icinga\Module\Monitoring\Backend\Ido\Query\IdoQuery;
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use Icinga\Module\Monitoring\Backend\MonitoringBackend;
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/**
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* A read-only view of an underlying query
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*/
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abstract class DataView implements QueryInterface, IteratorAggregate
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{
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/**
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* The query used to populate the view
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*
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* @var IdoQuery
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*/
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protected $query;
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protected $filter;
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protected $connection;
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protected $isSorted = false;
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/**
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* Create a new view
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*
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* @param ConnectionInterface $connection
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* @param array $columns
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*/
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public function __construct(ConnectionInterface $connection, array $columns = null)
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{
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$this->connection = $connection;
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$this->query = $connection->query($this->getQueryName(), $columns);
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$this->filter = Filter::matchAll();
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$this->init();
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}
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/**
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* Initializer for `distinct purposes
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*
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* Implemented for `distinct as workaround
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*
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* @TODO Subject to change, see #7344
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*/
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public function init()
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{
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}
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/**
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* Return a iterator for all rows of the result set
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*
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* @return IdoQuery
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*/
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public function getIterator()
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{
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return $this->getQuery();
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}
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/**
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* Get the query name this data view relies on
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*
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* By default this is this class' name without its namespace
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*
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* @return string
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*/
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public static function getQueryName()
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{
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$tableName = explode('\\', get_called_class());
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$tableName = end($tableName);
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return $tableName;
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}
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public function where($condition, $value = null)
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{
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$this->filter->addFilter(Filter::where($condition, $value));
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$this->query->where($condition, $value);
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return $this;
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}
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public function dump()
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{
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$this->order();
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return $this->query->dump();
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}
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/**
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* Retrieve columns provided by this view
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*
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* @return array
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*/
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abstract public function getColumns();
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/**
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* Create view from request
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*
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* @param Request $request
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* @param array $columns
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*
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* @return static
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* @deprecated Use $backend->select()->from($viewName) instead
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*/
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public static function fromRequest($request, array $columns = null)
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{
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$view = new static(MonitoringBackend::instance($request->getParam('backend')), $columns);
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$view->applyUrlFilter($request);
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return $view;
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}
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// TODO: This is not the right place for this, move it away
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protected function applyUrlFilter($request = null)
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{
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$url = Url::fromRequest();
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$limit = $url->shift('limit');
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$sort = $url->shift('sort');
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$dir = $url->shift('dir');
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$page = $url->shift('page');
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$format = $url->shift('format');
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$view = $url->shift('view');
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$view = $url->shift('backend');
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foreach ($url->getParams() as $k => $v) {
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$this->where($k, $v);
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}
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if ($sort) {
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$this->order($sort, $dir);
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}
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}
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/**
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* Create view from params
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*
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* @param array $params
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* @param array $columns
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*
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* @return static
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*/
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public static function fromParams(array $params, array $columns = null)
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{
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$view = new static(MonitoringBackend::instance($params['backend']), $columns);
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foreach ($params as $key => $value) {
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if ($view->isValidFilterTarget($key)) {
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$view->where($key, $value);
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}
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}
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if (isset($params['sort'])) {
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$order = isset($params['order']) ? $params['order'] : null;
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if ($order !== null) {
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if (strtolower($order) === 'desc') {
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$order = self::SORT_DESC;
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} else {
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$order = self::SORT_ASC;
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}
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}
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$view->sort($params['sort'], $order);
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}
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return $view;
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}
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/**
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* Check whether the given column is a valid filter column, i.e. the view actually provides the column or it's
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* a non-queryable filter column
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*
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* @param string $column
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*
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* @return bool
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*/
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public function isValidFilterTarget($column)
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{
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return in_array($column, $this->getColumns()) || in_array($column, $this->getFilterColumns());
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}
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public function getFilterColumns()
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{
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return array();
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}
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public function getFilter()
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{
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return $this->filter;
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}
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/**
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* Return a pivot table for the given columns based on the current query
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*
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* @param string $xAxisColumn The column to use for the x axis
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* @param string $yAxisColumn The column to use for the y axis
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* @param Filter $xAxisFilter The filter to apply on a query for the x axis
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* @param Filter $yAxisFilter The filter to apply on a query for the y axis
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*
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* @return PivotTable
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*/
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public function pivot($xAxisColumn, $yAxisColumn, Filter $xAxisFilter = null, Filter $yAxisFilter = null)
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{
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$pivot = new PivotTable($this->query, $xAxisColumn, $yAxisColumn);
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return $pivot->setXAxisFilter($xAxisFilter)->setYAxisFilter($yAxisFilter);
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}
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/**
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* Sort the rows, according to the specified sort column and order
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*
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* @param string $column Sort column
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* @param string $order Sort order, one of the SORT_ constants
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*
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* @return $this
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* @throws QueryException If the sort column is not allowed
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* @see DataView::SORT_ASC
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* @see DataView::SORT_DESC
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* @deprecated Use DataView::order() instead
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*/
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public function sort($column = null, $order = null)
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{
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$sortRules = $this->getSortRules();
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if ($column === null) {
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// Use first available sort rule as default
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if (empty($sortRules)) {
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return $this;
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}
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$sortColumns = reset($sortRules);
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if (! isset($sortColumns['columns'])) {
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$sortColumns['columns'] = array(key($sortRules));
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}
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} else {
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if (isset($sortRules[$column])) {
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$sortColumns = $sortRules[$column];
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if (! isset($sortColumns['columns'])) {
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$sortColumns['columns'] = array($column);
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}
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} else {
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$sortColumns = array(
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'columns' => array($column),
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'order' => $order
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);
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};
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}
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$order = $order === null ? (isset($sortColumns['order']) ? $sortColumns['order'] : static::SORT_ASC) : $order;
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$order = (strtoupper($order) === static::SORT_ASC) ? 'ASC' : 'DESC';
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foreach ($sortColumns['columns'] as $column) {
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list($column, $direction) = $this->query->splitOrder($column);
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if (! $this->isValidFilterTarget($column)) {
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throw new QueryException(
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mt('monitoring', 'The sort column "%s" is not allowed in "%s".'),
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$column,
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get_class($this)
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);
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}
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$this->query->order($column, $direction !== null ? $direction : $order);
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}
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$this->isSorted = true;
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return $this;
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}
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/**
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* Retrieve default sorting rules for particular columns. These involve sort order and potential additional to sort
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*
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* @return array
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*/
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public function getSortRules()
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{
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return array();
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}
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/**
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* Sort result set either by the given column (and direction) or the sort defaults
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*
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* @param string $column
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* @param string $direction
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*
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* @return $this
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*/
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public function order($column = null, $direction = null)
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{
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return $this->sort($column, $direction);
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}
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/**
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* Whether an order is set
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*
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* @return bool
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*/
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public function hasOrder()
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{
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return $this->query->hasOrder();
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}
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/**
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* Get the order if any
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*
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* @return array|null
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*/
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public function getOrder()
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{
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return $this->query->getOrder();
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}
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public function getMappedField($field)
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{
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return $this->query->getMappedField($field);
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}
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/**
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* Return the query which was created in the constructor
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*
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* @return \Icinga\Data\SimpleQuery
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*/
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public function getQuery()
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{
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if (! $this->isSorted) {
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$this->order();
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}
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return $this->query;
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}
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public function applyFilter(Filter $filter)
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{
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$this->validateFilterColumns($filter);
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return $this->addFilter($filter);
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}
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/**
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* Validates recursive the Filter columns against the isValidFilterTarget() method
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*
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* @param Filter $filter
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*
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* @throws \Icinga\Data\Filter\FilterException
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*/
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public function validateFilterColumns(Filter $filter)
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{
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if ($filter instanceof FilterMatch) {
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if (! $this->isValidFilterTarget($filter->getColumn())) {
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throw new QueryException(
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mt('monitoring', 'The filter column "%s" is not allowed here.'),
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$filter->getColumn()
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);
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}
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}
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if (method_exists($filter, 'filters')) {
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foreach ($filter->filters() as $filter) {
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$this->validateFilterColumns($filter);
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}
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}
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}
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public function clearFilter()
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{
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$this->query->clearFilter();
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return $this;
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}
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/**
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* @deprecated(EL): Only use DataView::applyFilter() for applying filter because all other functions are missing
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* column validation. Filter::matchAny() for the IdoQuery (or the DbQuery or the SimpleQuery I didn't have a look)
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* is required for the filter to work properly.
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*/
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public function setFilter(Filter $filter)
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{
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$this->query->setFilter($filter);
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return $this;
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}
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/**
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* Get the view's search columns
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*
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* @return string[]
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*/
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public function getSearchColumns()
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{
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return array();
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}
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/**
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* @deprecated(EL): Only use DataView::applyFilter() for applying filter because all other functions are missing
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* column validation.
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*/
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public function addFilter(Filter $filter)
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{
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$this->query->addFilter(clone($filter));
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$this->filter = $filter; // TODO: Hmmmm.... and?
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return $this;
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}
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/**
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* Count result set
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*
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* @return int
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*/
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public function count()
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{
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return $this->query->count();
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}
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/**
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* Set a limit count and offset
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*
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* @param int $count Number of rows to return
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* @param int $offset Start returning after this many rows
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*
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* @return self
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*/
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public function limit($count = null, $offset = null)
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{
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$this->query->limit($count, $offset);
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return $this;
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}
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/**
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* Whether a limit is set
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*
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* @return bool
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*/
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public function hasLimit()
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{
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return $this->query->hasLimit();
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}
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/**
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* Get the limit if any
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*
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* @return int|null
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*/
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public function getLimit()
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{
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return $this->query->getLimit();
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}
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/**
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* Whether an offset is set
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*
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* @return bool
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*/
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public function hasOffset()
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{
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return $this->query->hasOffset();
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}
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/**
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* Get the offset if any
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*
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* @return int|null
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*/
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public function getOffset()
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{
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return $this->query->getOffset();
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}
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/**
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* Retrieve an array containing all rows of the result set
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*
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* @return array
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*/
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public function fetchAll()
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{
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return $this->getQuery()->fetchAll();
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}
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/**
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* Fetch the first row of the result set
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*
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* @return mixed
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*/
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public function fetchRow()
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{
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return $this->getQuery()->fetchRow();
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}
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/**
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* Fetch the first column of all rows of the result set as an array
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*
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* @return array
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*/
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public function fetchColumn()
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{
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return $this->getQuery()->fetchColumn();
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}
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/**
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* Fetch the first column of the first row of the result set
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*
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* @return string
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*/
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public function fetchOne()
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{
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return $this->getQuery()->fetchOne();
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}
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/**
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* Fetch all rows of the result set as an array of key-value pairs
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*
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* The first column is the key, the second column is the value.
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*
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* @return array
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*/
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public function fetchPairs()
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{
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return $this->getQuery()->fetchPairs();
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}
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}
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