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authorLuke Shumaker <LukeShu@sbcglobal.net>2014-01-28 09:50:25 -0500
committerLuke Shumaker <LukeShu@sbcglobal.net>2014-01-28 09:50:25 -0500
commit5744df39e15f85c6cc8a9faf8924d77e76d2b216 (patch)
treea8c8dd40a94d1fa0d5377566aa5548ae55a163da /includes/api/ApiQueryORM.php
parent4bb2aeca1d198391ca856aa16c40b8559c68daec (diff)
parent224b22a051051f6c2e494c3a2fb4adb42898e2d1 (diff)
Merge branch 'archwiki'
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Diffstat (limited to 'includes/api/ApiQueryORM.php')
-rw-r--r--includes/api/ApiQueryORM.php264
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diff --git a/includes/api/ApiQueryORM.php b/includes/api/ApiQueryORM.php
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+++ b/includes/api/ApiQueryORM.php
@@ -0,0 +1,264 @@
+<?php
+
+/**
+ * Base query module for querying results from ORMTables.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @since 1.21
+ *
+ * @file
+ * @ingroup API
+ *
+ * @license GNU GPL v2+
+ * @author Jeroen De Dauw < jeroendedauw@gmail.com >
+ */
+abstract class ApiQueryORM extends ApiQueryBase {
+
+ /**
+ * Returns an instance of the IORMTable table being queried.
+ *
+ * @since 1.21
+ *
+ * @return IORMTable
+ */
+ abstract protected function getTable();
+
+ /**
+ * Returns the name of the individual rows.
+ * For example: page, user, contest, campaign, etc.
+ * This is used to appropriately name elements in XML.
+ * Deriving classes typically override this method.
+ *
+ * @since 1.21
+ *
+ * @return string
+ */
+ protected function getRowName() {
+ return 'item';
+ }
+
+ /**
+ * Returns the name of the list of rows.
+ * For example: pages, users, contests, campaigns, etc.
+ * This is used to appropriately name nodes in the output.
+ * Deriving classes typically override this method.
+ *
+ * @since 1.21
+ *
+ * @return string
+ */
+ protected function getListName() {
+ return 'items';
+ }
+
+ /**
+ * Returns the path to where the items results should be added in the result.
+ *
+ * @since 1.21
+ *
+ * @return null|string|array
+ */
+ protected function getResultPath() {
+ return null;
+ }
+
+ /**
+ * Get the parameters, find out what the conditions for the query are,
+ * run it, and add the results.
+ *
+ * @since 1.21
+ */
+ public function execute() {
+ $params = $this->getParams();
+
+ if ( !in_array( 'id', $params['props'] ) ) {
+ $params['props'][] = 'id';
+ }
+
+ $results = $this->getResults( $params, $this->getConditions( $params ) );
+ $this->addResults( $params, $results );
+ }
+
+ /**
+ * Get the request parameters and remove all params set
+ * to null (ie those that are not actually provided).
+ *
+ * @since 1.21
+ *
+ * @return array
+ */
+ protected function getParams() {
+ return array_filter(
+ $this->extractRequestParams(),
+ function( $prop ) {
+ return isset( $prop );
+ }
+ );
+ }
+
+ /**
+ * Get the conditions for the query. These will be provided as
+ * regular parameters, together with limit, props, continue,
+ * and possibly others which we need to get rid off.
+ *
+ * @since 1.21
+ *
+ * @param array $params
+ *
+ * @return array
+ */
+ protected function getConditions( array $params ) {
+ $conditions = array();
+ $fields = $this->getTable()->getFields();
+
+ foreach ( $params as $name => $value ) {
+ if ( array_key_exists( $name, $fields ) ) {
+ $conditions[$name] = $value;
+ }
+ }
+
+ return $conditions;
+ }
+
+ /**
+ * Get the actual results.
+ *
+ * @since 1.21
+ *
+ * @param array $params
+ * @param array $conditions
+ *
+ * @return ORMResult
+ */
+ protected function getResults( array $params, array $conditions ) {
+ return $this->getTable()->select(
+ $params['props'],
+ $conditions,
+ array(
+ 'LIMIT' => $params['limit'] + 1,
+ 'ORDER BY' => $this->getTable()->getPrefixedField( 'id' ) . ' ASC',
+ ),
+ __METHOD__
+ );
+ }
+
+ /**
+ * Serialize the results and add them to the result object.
+ *
+ * @since 1.21
+ *
+ * @param array $params
+ * @param ORMResult $results
+ */
+ protected function addResults( array $params, ORMResult $results ) {
+ $serializedResults = array();
+ $count = 0;
+
+ foreach ( $results as /* IORMRow */ $result ) {
+ if ( ++$count > $params['limit'] ) {
+ // We've reached the one extra which shows that
+ // there are additional pages to be had. Stop here...
+ $this->setContinueEnumParameter( 'continue', $result->getId() );
+ break;
+ }
+
+ $serializedResults[] = $this->formatRow( $result, $params );
+ }
+
+ $this->setIndexedTagNames( $serializedResults );
+ $this->addSerializedResults( $serializedResults );
+ }
+
+ /**
+ * Formats a row to it's desired output format.
+ *
+ * @since 1.21
+ *
+ * @param IORMRow $result
+ * @param array $params
+ *
+ * @return mixed
+ */
+ protected function formatRow( IORMRow $result, array $params ) {
+ return $result->toArray( $params['props'] );
+ }
+
+ /**
+ * Set the tag names for formats such as XML.
+ *
+ * @since 1.21
+ *
+ * @param array $serializedResults
+ */
+ protected function setIndexedTagNames( array &$serializedResults ) {
+ $this->getResult()->setIndexedTagName( $serializedResults, $this->getRowName() );
+ }
+
+ /**
+ * Add the serialized results to the result object.
+ *
+ * @since 1.21
+ *
+ * @param array $serializedResults
+ */
+ protected function addSerializedResults( array $serializedResults ) {
+ $this->getResult()->addValue(
+ $this->getResultPath(),
+ $this->getListName(),
+ $serializedResults
+ );
+ }
+
+ /**
+ * @see ApiBase::getAllowedParams()
+ * @return array
+ */
+ public function getAllowedParams() {
+ $params = array(
+ 'props' => array(
+ ApiBase::PARAM_TYPE => $this->getTable()->getFieldNames(),
+ ApiBase::PARAM_ISMULTI => true,
+ ApiBase::PARAM_REQUIRED => true,
+ ),
+ 'limit' => array(
+ ApiBase::PARAM_DFLT => 20,
+ ApiBase::PARAM_TYPE => 'limit',
+ ApiBase::PARAM_MIN => 1,
+ ApiBase::PARAM_MAX => ApiBase::LIMIT_BIG1,
+ ApiBase::PARAM_MAX2 => ApiBase::LIMIT_BIG2
+ ),
+ 'continue' => null,
+ );
+
+ return array_merge( $this->getTable()->getAPIParams(), $params );
+ }
+
+ /**
+ * @see ApiBase::getParamDescription()
+ * @return array
+ */
+ public function getParamDescription() {
+ $descriptions = array(
+ 'props' => 'Fields to query',
+ 'continue' => 'Offset number from where to continue the query',
+ 'limit' => 'Max amount of rows to return',
+ );
+
+ return array_merge( $this->getTable()->getFieldDescriptions(), $descriptions );
+ }
+
+}