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diff --git a/www/wiki/extensions/Translate/translationaids/QueryAggregatorAwareTranslationAid.php b/www/wiki/extensions/Translate/translationaids/QueryAggregatorAwareTranslationAid.php
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+++ b/www/wiki/extensions/Translate/translationaids/QueryAggregatorAwareTranslationAid.php
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+<?php
+/**
+ * Translation aid helper class.
+ *
+ * @file
+ * @author Niklas Laxström
+ * @license GPL-2.0-or-later
+ */
+
+/**
+ * Helper class for translation aids which use web services.
+ *
+ * @ingroup TranslationAids
+ * @since 2015.02
+ */
+abstract class QueryAggregatorAwareTranslationAid
+	extends TranslationAid
+	implements QueryAggregatorAware
+{
+	private $queries = [];
+	private $aggregator;
+
+	// Interface: QueryAggregatorAware
+	public function setQueryAggregator( QueryAggregator $aggregator ) {
+		$this->aggregator = $aggregator;
+	}
+
+	/**
+	 * Stores a web service query for later execution.
+	 * @param TranslationWebService $service
+	 * @param string $from Source language
+	 * @param string $to Target language
+	 * @param string $text Source text
+	 */
+	protected function storeQuery( TranslationWebService $service, $from, $to, $text ) {
+		$queries = $service->getQueries( $text, $from, $to );
+		foreach ( $queries as $query ) {
+			$this->queries[] = [
+				'id' => $this->aggregator->addQuery( $query ),
+				'language' => $from,
+				'text' => $text,
+				'service' => $service,
+			];
+		}
+	}
+
+	/**
+	 * Returns all stored queries.
+	 * @return array Map of executed queries:
+	 *  - language: string: source language
+	 *  - text: string: source text
+	 *  - response: TranslationQueryResponse
+	 */
+	protected function getQueryData() {
+		foreach ( $this->queries as &$queryData ) {
+			$queryData['response'] = $this->aggregator->getResponse( $queryData['id'] );
+			unset( $queryData['id'] );
+		}
+
+		return $this->queries;
+	}
+
+	/**
+	 * Returns all web services of given type.
+	 * @param string $type
+	 * @return TranslationWebService[]
+	 */
+	protected function getWebServices( $type ) {
+		global $wgTranslateTranslationServices;
+
+		$services = [];
+		foreach ( $wgTranslateTranslationServices as $name => $config ) {
+			$service = TranslationWebService::factory( $name, $config );
+			if ( !$service || $service->getType() !== $type ) {
+				continue;
+			}
+
+			$services[$name] = $service;
+		}
+
+		return $services;
+	}
+}