migrate data to a specific table

Signed-off-by: Maxence Lange <maxence@artificial-owl.com>

12 files changed, 427 insertions, 33 deletions

diff --git a/lib/Command/CacheRefresh.php b/lib/Command/CacheRefresh.php
index 71165df2..349edc4f 100644
--- a/lib/Command/CacheRefresh.php
+++ b/lib/Command/CacheRefresh.php
@@ -128,6 +128,5 @@ class CacheRefresh extends Base {
 		$output->writeLn($result . ' hashtags updated');
 	}
 
-
 }
 
diff --git a/lib/Db/CoreRequestBuilder.php b/lib/Db/CoreRequestBuilder.php
index 4ddd6ece..dc347c64 100644
--- a/lib/Db/CoreRequestBuilder.php
+++ b/lib/Db/CoreRequestBuilder.php
@@ -65,6 +65,7 @@ class CoreRequestBuilder {
 	const TABLE_ACTORS = 'social_a2_actors';
 	const TABLE_STREAM = 'social_a2_stream';
 	const TABLE_STREAM_DEST = 'social_a2_stream_dest';
+	const TABLE_STREAM_TAGS = 'social_a2_stream_tags';
 	const TABLE_STREAM_QUEUE = 'social_a2_stream_queue';
 	const TABLE_STREAM_ACTIONS = 'social_a2_stream_action';
 
@@ -87,6 +88,7 @@ class CoreRequestBuilder {
 		self::TABLE_CACHE_DOCUMENTS,
 		self::TABLE_STREAM_QUEUE,
 		self::TABLE_STREAM_DEST,
+		self::TABLE_STREAM_TAGS,
 		self::TABLE_STREAM_ACTIONS
 	];
 
diff --git a/lib/Db/SocialCrossQueryBuilder.php b/lib/Db/SocialCrossQueryBuilder.php
index bfd99de7..4cd50c5d 100644
--- a/lib/Db/SocialCrossQueryBuilder.php
+++ b/lib/Db/SocialCrossQueryBuilder.php
@@ -66,7 +66,24 @@ class SocialCrossQueryBuilder extends SocialCoreQueryBuilder {
 	 * @param string $alias
 	 * @param string $link
 	 */
-	public function innerJoinCacheActors(string $alias = 'ca', string $link = '') {
+	public function linkToStreamTags(string $alias = 'st', string $link = '') {
+		if ($this->getType() !== QueryBuilder::SELECT) {
+			return;
+		}
+
+		$this->from(CoreRequestBuilder::TABLE_STREAM_TAGS, $alias);
+		if ($link !== '') {
+			$expr = $this->expr();
+			$this->andWhere($expr->eq($alias . '.stream_id', $link));
+		}
+	}
+
+
+	/**
+	 * @param string $alias
+	 * @param string $link
+	 */
+	public function linkToCacheActors(string $alias = 'ca', string $link = '') {
 		if ($this->getType() !== QueryBuilder::SELECT) {
 			return;
 		}
@@ -173,15 +190,14 @@ class SocialCrossQueryBuilder extends SocialCoreQueryBuilder {
 
 	/**
 	 * @param string $type
-	 * @param string $subType
 	 * @param string $field
 	 * @param string $aliasDest
 	 * @param string $alias
 	 */
-	public function innerJoinDest(
+	public function innerJoinSteamDest(
 		string $type, string $field = 'id_prim', string $aliasDest = 'sd', string $alias = ''
 	) {
-		$this->andWhere($this->exprInnerJoinDest($type, $field, $aliasDest, $alias));
+		$this->andWhere($this->exprInnerJoinStreamDest($type, $field, $aliasDest, $alias));
 	}
 
 
@@ -194,7 +210,7 @@ class SocialCrossQueryBuilder extends SocialCoreQueryBuilder {
 	 *
 	 * @return ICompositeExpression
 	 */
-	public function exprInnerJoinDest(
+	public function exprInnerJoinStreamDest(
 		string $type, string $field = 'id_prim', string $aliasDest = 'sd', string $alias = ''
 	): ICompositeExpression {
 		$expr = $this->expr();
@@ -207,12 +223,22 @@ class SocialCrossQueryBuilder extends SocialCoreQueryBuilder {
 	}
 
 
-	public function innerJoinDestFollowing(
+	/**
+	 * @param string $actorId
+	 * @param string $type
+	 * @param string $field
+	 * @param string $aliasDest
+	 * @param string $aliasFollowing
+	 * @param string $alias
+	 */
+	public function innerJoinStreamDestFollowing(
 		string $actorId, string $type, string $field = 'id_prim', string $aliasDest = 'sd',
 		string $aliasFollowing = 'f', string $alias = ''
 	) {
 		$this->andWhere(
-			$this->exprInnerJoinDestFollowing($actorId, $type, $field, $aliasDest, $aliasFollowing, $alias)
+			$this->exprInnerJoinStreamDestFollowing(
+				$actorId, $type, $field, $aliasDest, $aliasFollowing, $alias
+			)
 		);
 	}
 
@@ -227,7 +253,7 @@ class SocialCrossQueryBuilder extends SocialCoreQueryBuilder {
 	 *
 	 * @return ICompositeExpression
 	 */
-	public function exprInnerJoinDestFollowing(
+	public function exprInnerJoinStreamDestFollowing(
 		string $actorId, string $type, string $field = 'id_prim', string $aliasDest = 'sd',
 		string $aliasFollowing = 'f', string $alias = ''
 	): ICompositeExpression {
diff --git a/lib/Db/SocialLimitsQueryBuilder.php b/lib/Db/SocialLimitsQueryBuilder.php
index f4c21bb5..e3cb83ae 100644
--- a/lib/Db/SocialLimitsQueryBuilder.php
+++ b/lib/Db/SocialLimitsQueryBuilder.php
@@ -365,7 +365,7 @@ class SocialLimitsQueryBuilder extends SocialCrossQueryBuilder {
 	) {
 		if (!$this->hasViewer()) {
 			$this->selectDestFollowing($aliasDest);
-			$this->innerJoinDest('recipient', 'id_prim', 'sd', 's');
+			$this->innerJoinSteamDest('recipient', 'id_prim', 'sd', 's');
 			$this->limitToDest(ACore::CONTEXT_PUBLIC, 'recipient', '', $aliasDest);
 
 			return;
@@ -376,7 +376,7 @@ class SocialLimitsQueryBuilder extends SocialCrossQueryBuilder {
 		$orX = $expr->orX();
 		$actor = $this->getViewer();
 
-		$following = $this->exprInnerJoinDestFollowing(
+		$following = $this->exprInnerJoinStreamDestFollowing(
 			$actor->getId(), 'recipient', 'id_prim', $aliasDest, $aliasFollowing
 		);
 		$orX->add($following);
diff --git a/lib/Db/StreamDestRequest.php b/lib/Db/StreamDestRequest.php
index 8ea6908d..78194f0d 100644
--- a/lib/Db/StreamDestRequest.php
+++ b/lib/Db/StreamDestRequest.php
@@ -87,7 +87,7 @@ class StreamDestRequest extends StreamDestRequestBuilder {
 					$qb->execute();
 				} catch (UniqueConstraintViolationException $e) {
 					\OC::$server->getLogger()
-								->log(3, 'Social - Duplicate recipient on Stream ' . json_encode($stream));
+								->log(1, 'Social - Duplicate recipient on Stream ' . json_encode($stream));
 				}
 			}
 		}
diff --git a/lib/Db/StreamDestRequestBuilder.php b/lib/Db/StreamDestRequestBuilder.php
index 9bb60738..986e0215 100644
--- a/lib/Db/StreamDestRequestBuilder.php
+++ b/lib/Db/StreamDestRequestBuilder.php
@@ -64,7 +64,7 @@ class StreamDestRequestBuilder extends CoreRequestBuilder {
 	 * @return IQueryBuilder
 	 */
 	protected function getStreamDestUpdateSql(): IQueryBuilder {
-		$qb = $this->dbConnection->getQueryBuilder();
+		$qb = $this->getQueryBuilder();
 		$qb->update(self::TABLE_STREAM_DEST);
 
 		return $qb;
@@ -77,7 +77,7 @@ class StreamDestRequestBuilder extends CoreRequestBuilder {
 	 * @return IQueryBuilder
 	 */
 	protected function getStreamDestSelectSql(): IQueryBuilder {
-		$qb = $this->dbConnection->getQueryBuilder();
+		$qb = $this->getQueryBuilder();
 
 		/** @noinspection PhpMethodParametersCountMismatchInspection */
 		$qb->select('sd.actor_id', 'sd.stream_id', 'sd.type')
@@ -95,7 +95,7 @@ class StreamDestRequestBuilder extends CoreRequestBuilder {
 	 * @return IQueryBuilder
 	 */
 	protected function getStreamDestDeleteSql(): IQueryBuilder {
-		$qb = $this->dbConnection->getQueryBuilder();
+		$qb = $this->getQueryBuilder();
 		$qb->delete(self::TABLE_STREAM_DEST);
 
 		return $qb;
@@ -108,7 +108,7 @@ class StreamDestRequestBuilder extends CoreRequestBuilder {
 	 * @return IQueryBuilder
 	 */
 	protected function countStreamDestSelectSql(): IQueryBuilder {
-		$qb = $this->dbConnection->getQueryBuilder();
+		$qb = $this->getQueryBuilder();
 		$qb->selectAlias($qb->createFunction('COUNT(*)'), 'count')
 		   ->from(self::TABLE_STREAM_DEST, 'sd');
 
diff --git a/lib/Db/StreamRequest.php b/lib/Db/StreamRequest.php
index a5ea0dbc..c321f2a5 100644
--- a/lib/Db/StreamRequest.php
+++ b/lib/Db/StreamRequest.php
@@ -62,6 +62,9 @@ class StreamRequest extends StreamRequestBuilder {
 	/** @var StreamDestRequest */
 	private $streamDestRequest;
 
+	/** @var StreamTagsRequest */
+	private $streamTagsRequest;
+
 
 	/**
 	 * StreamRequest constructor.
@@ -74,11 +77,12 @@ class StreamRequest extends StreamRequestBuilder {
 	 */
 	public function __construct(
 		IDBConnection $connection, ILogger $logger, StreamDestRequest $streamDestRequest,
-		ConfigService $configService, MiscService $miscService
+		StreamTagsRequest $streamTagsRequest, ConfigService $configService, MiscService $miscService
 	) {
 		parent::__construct($connection, $logger, $configService, $miscService);
 
 		$this->streamDestRequest = $streamDestRequest;
+		$this->streamTagsRequest = $streamTagsRequest;
 	}
 
 
@@ -101,6 +105,7 @@ class StreamRequest extends StreamRequestBuilder {
 			$qb->execute();
 
 			$this->streamDestRequest->generateStreamDest($stream);
+			$this->streamTagsRequest->generateStreamTags($stream);
 		} catch (UniqueConstraintViolationException $e) {
 		}
 	}
@@ -231,7 +236,7 @@ class StreamRequest extends StreamRequestBuilder {
 		$expr = $qb->expr();
 
 		$qb->limitToIdPrim($qb->prim($id));
-		$qb->innerJoinCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToCacheActors('ca', 's.attributed_to_prim');
 
 		if ($asViewer) {
 			$qb->limitToViewer('sd', 'f', true);
@@ -271,7 +276,7 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb->limitPaginate($since, $limit);
 
 		$expr = $qb->expr();
-		$qb->innerJoinCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToCacheActors('ca', 's.attributed_to_prim');
 
 		$qb->andWhere($expr->eq('s.attributed_to', 'ca.id_prim'));
 
@@ -337,7 +342,7 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb->limitToType(Note::TYPE);
 
 		$qb->selectDestFollowing('sd', '');
-		$qb->innerJoinDest('recipient', 'id_prim', 'sd', 's');
+		$qb->innerJoinSteamDest('recipient', 'id_prim', 'sd', 's');
 		$qb->limitToDest(ACore::CONTEXT_PUBLIC, 'recipient', '', 'sd');
 
 		$cursor = $qb->execute();
@@ -364,7 +369,7 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb = $this->getStreamSelectSql();
 		$expr = $qb->expr();
 
-		$qb->innerJoinCacheActors('ca', 'f.object_id_prim');
+		$qb->linkToCacheActors('ca', 'f.object_id_prim');
 		$qb->limitPaginate($since, $limit);
 
 		$qb->andWhere($qb->exprLimitToDBField('type', SocialAppNotification::TYPE, false));
@@ -401,7 +406,7 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb->limitToDest($actor->getId(), 'recipient', '', 'sd');
 		$qb->limitToType(SocialAppNotification::TYPE);
 
-		$qb->innerJoinCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToCacheActors('ca', 's.attributed_to_prim');
 		$qb->leftJoinStreamAction();
 
 		return $this->getStreamsFromRequest($qb);
@@ -427,10 +432,10 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb->limitToAttributedTo($actorId);
 
 		$qb->selectDestFollowing('sd', '');
-		$qb->innerJoinDest('recipient', 'id_prim', 'sd', 's');
+		$qb->innerJoinSteamDest('recipient', 'id_prim', 'sd', 's');
 		$qb->limitToDest(ACore::CONTEXT_PUBLIC, 'recipient', '', 'sd');
 
-		$qb->innerJoinCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToCacheActors('ca', 's.attributed_to_prim');
 		$qb->leftJoinStreamAction();
 
 		return $this->getStreamsFromRequest($qb);
@@ -455,10 +460,10 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb->filterType(SocialAppNotification::TYPE);
 		$qb->limitPaginate($since, $limit);
 
-		$qb->innerJoinCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToCacheActors('ca', 's.attributed_to_prim');
 
 		$qb->selectDestFollowing('sd', '');
-		$qb->innerJoinDest('recipient', 'id_prim', 'sd', 's');
+		$qb->innerJoinSteamDest('recipient', 'id_prim', 'sd', 's');
 		$qb->limitToDest($actor->getId(), 'recipient', '', 'sd');
 
 		$qb->filterDest(ACore::CONTEXT_PUBLIC);
@@ -488,11 +493,11 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb->limitToLocal($localOnly);
 		$qb->limitToType(Note::TYPE);
 
-		$qb->innerJoinCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToCacheActors('ca', 's.attributed_to_prim');
 		$qb->leftJoinStreamAction();
 
 		$qb->selectDestFollowing('sd', '');
-		$qb->innerJoinDest('recipient', 'id_prim', 'sd', 's');
+		$qb->innerJoinSteamDest('recipient', 'id_prim', 'sd', 's');
 		$qb->limitToDest(ACore::CONTEXT_PUBLIC, 'recipient', 'to', 'sd');
 
 		return $this->getStreamsFromRequest($qb);
@@ -521,7 +526,7 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb->limitPaginate($since, $limit);
 
 		$expr = $qb->expr();
-		$qb->innerJoinCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToCacheActors('ca', 's.attributed_to_prim');
 
 		$qb->selectStreamActions('sa');
 		$qb->andWhere($expr->eq('sa.stream_id_prim', 's.id_prim'));
@@ -549,10 +554,12 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb = $this->getStreamSelectSql();
 
 		$expr = $qb->expr();
-		$qb->innerJoinCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToCacheActors('ca', 's.attributed_to_prim');
+		$qb->linkToStreamTags('st', 's.id_prim');
 		$qb->limitPaginate($since, $limit);
 
 		$qb->andWhere($qb->exprLimitToDBField('type', Note::TYPE));
+		$qb->andWhere($qb->exprLimitToDBField('hashtag', $hashtag, true, false, 'st'));
 
 		$qb->limitToViewer('sd', 'f', true);
 		$qb->andWhere($expr->eq('s.attributed_to_prim', 'ca.id_prim'));
@@ -560,7 +567,7 @@ class StreamRequest extends StreamRequestBuilder {
 		$qb->leftJoinStreamAction('sa');
 
 		// TODO: Sql optimisation - Create a table like stream_dest for to link 'hashtag' to 'stream_id'
-		$qb->andWhere($this->exprValueWithinJsonFormat($qb, 'hashtags', '' . $hashtag));
+//		$qb->andWhere($this->exprValueWithinJsonFormat($qb, 'hashtags', '' . $hashtag));
 
 		return $this->getStreamsFromRequest($qb);
 	}
diff --git a/lib/Db/StreamTagsRequest.php b/lib/Db/StreamTagsRequest.php
new file mode 100644
index 00000000..4b80d34a
--- /dev/null
+++ b/lib/Db/StreamTagsRequest.php
@@ -0,0 +1,78 @@
+<?php
+declare(strict_types=1);
+
+
+/**
+ * Nextcloud - Social Support
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+namespace OCA\Social\Db;
+
+
+use daita\MySmallPhpTools\Traits\TStringTools;
+use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
+use OCA\Social\Model\ActivityPub\Stream;
+
+
+/**
+ * Class StreamTagsRequest
+ *
+ * @package OCA\Social\Db
+ */
+class StreamTagsRequest extends StreamTagsRequestBuilder {
+
+
+	use TStringTools;
+
+
+	/**
+	 * @param Stream $stream
+	 */
+	public function generateStreamTags(Stream $stream) {
+		$hashtags = $stream->getTags();
+
+		$this->miscService->log('$$$$ ' . json_encode($hashtags));
+		foreach ($hashtags as $hashtag) {
+			$tag = $this->get('name', $hashtag);
+			if ($this->get('type', $hashtag) !== 'Hashtag' || $tag === '') {
+				continue;
+			}
+
+			$tag = substr($tag, 1);
+			$qb = $this->getStreamTagsInsertSql();
+			$streamId = $qb->prim($stream->getId());
+			$qb->setValue('stream_id', $qb->createNamedParameter($streamId));
+			$qb->setValue('hashtag', $qb->createNamedParameter($tag));
+			try {
+				$qb->execute();
+			} catch (UniqueConstraintViolationException $e) {
+				\OC::$server->getLogger()
+							->log(1, 'Social - Duplicate hashtag on Stream ' . json_encode($stream));
+			}
+		}
+	}
+
+}
+
diff --git a/lib/Db/StreamTagsRequestBuilder.php b/lib/Db/StreamTagsRequestBuilder.php
new file mode 100644
index 00000000..25fe9f67
--- /dev/null
+++ b/lib/Db/StreamTagsRequestBuilder.php
@@ -0,0 +1,105 @@
+<?php
+declare(strict_types=1);
+
+
+/**
+ * Nextcloud - Social Support
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Social\Db;
+
+
+use daita\MySmallPhpTools\Traits\TArrayTools;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+
+
+/**
+ * Class StreamDestRequestBuilder
+ *
+ * @package OCA\Social\Db
+ */
+class StreamTagsRequestBuilder extends CoreRequestBuilder {
+
+
+	use TArrayTools;
+
+
+	/**
+	 * Base of the Sql Insert request
+	 *
+	 * @return SocialQueryBuilder
+	 */
+	protected function getStreamTagsInsertSql(): SocialQueryBuilder {
+		$qb = $this->getQueryBuilder();
+		$qb->insert(self::TABLE_STREAM_TAGS);
+
+		return $qb;
+	}
+
+
+	/**
+	 * Base of the Sql Update request
+	 *
+	 * @return IQueryBuilder
+	 */
+	protected function getStreamTagsUpdateSql(): IQueryBuilder {
+		$qb = $this->getQueryBuilder();
+		$qb->update(self::TABLE_STREAM_TAGS);
+
+		return $qb;
+	}
+
+
+	/**
+	 * Base of the Sql Select request for Shares
+	 *
+	 * @return IQueryBuilder
+	 */
+	protected function getStreamTagsSelectSql(): IQueryBuilder {
+		$qb = $this->getQueryBuilder();
+
+		/** @noinspection PhpMethodParametersCountMismatchInspection */
+		$qb->select('st.stream_id', 'st.hashtag')
+		   ->from(self::TABLE_STREAM_TAGS, 'st');
+
+		$this->defaultSelectAlias = 'st';
+
+		return $qb;
+	}
+
+
+	/**
+	 * Base of the Sql Delete request
+	 *
+	 * @return IQueryBuilder
+	 */
+	protected function getStreamTagsDeleteSql(): IQueryBuilder {
+		$qb = $this->getQueryBuilder();
+		$qb->delete(self::TABLE_STREAM_TAGS);
+
+		return $qb;
+	}
+
+}
+
diff --git a/lib/Migration/Version0002Date20190916000001.php b/lib/Migration/Version0002Date20190916000001.php
index 14894b6d..04bf2c5e 100644
--- a/lib/Migration/Version0002Date20190916000001.php
+++ b/lib/Migration/Version0002Date20190916000001.php
@@ -390,7 +390,7 @@ class Version0002Date20190916000001 extends SimpleMigrationStep {
 					$insert->execute();
 				} catch (UniqueConstraintViolationException $e) {
 					\OC::$server->getLogger()
-								->log(3, 'Social - Duplicate recipient on Stream ' . json_encode($data));
+								->log(1, 'Social - Duplicate recipient on Stream ' . json_encode($data));
 				}
 			}
 		}
diff --git a/lib/Migration/Version0002Date20190925000001.php b/lib/Migration/Version0002Date20190925000001.php
index 50ea07bf..fc33b320 100644
--- a/lib/Migration/Version0002Date20190925000001.php
+++ b/lib/Migration/Version0002Date20190925000001.php
@@ -154,7 +154,7 @@ class Version0002Date20190925000001 extends SimpleMigrationStep {
 		$update->set('stream_id_prim', $update->createNamedParameter(hash('sha512', $streamId)));
 		$update->set('liked', $update->createNamedParameter($liked));
 		$update->set('boosted', $update->createNamedParameter($boosted));
-		$update->setValue('replied', $update->createNamedParameter($replied));
+		$update->set('replied', $update->createNamedParameter($replied));
 
 		$expr = $update->expr();
 		$update->where($expr->eq('id', $update->createNamedParameter($id)));
diff --git a/lib/Migration/Version0002Date20191001000001.php b/lib/Migration/Version0002Date20191001000001.php
new file mode 100644
index 00000000..86888a13
--- /dev/null
+++ b/lib/Migration/Version0002Date20191001000001.php
@@ -0,0 +1,177 @@
+<?php
+declare(strict_types=1);
+
+
+/**
+ * Nextcloud - Social Support
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+namespace OCA\Social\Migration;
+
+
+use Closure;
+use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
+use Doctrine\DBAL\Schema\SchemaException;
+use Exception;
+use OCP\DB\ISchemaWrapper;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+
+/**
+ * Class Version0002Date20191001000001
+ *
+ * @package OCA\Social\Migration
+ */
+class Version0002Date20191001000001 extends SimpleMigrationStep {
+
+
+	/** @var IDBConnection */
+	private $connection;
+
+
+	/**
+	 * @param IDBConnection $connection
+	 */
+	public function __construct(IDBConnection $connection) {
+		$this->connection = $connection;
+	}
+
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 *
+	 * @return ISchemaWrapper
+	 * @throws SchemaException
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options
+	): ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		if (!$schema->hasTable('social_a2_stream_tags')) {
+			$table = $schema->createTable('social_a2_stream_tags');
+
+			$table->addColumn(
+				'stream_id', 'string',
+				[
+					'notnull' => true,
+					'length'  => 128,
+				]
+			);
+			$table->addColumn(
+				'hashtag', 'string',
+				[
+					'notnull' => false,
+					'length'  => 127,
+				]
+			);
+
+			if (!$table->hasIndex('sh')) {
+				$table->addUniqueIndex(['stream_id', 'hashtag'], 'sh');
+			}
+		}
+
+		return $schema;
+	}
+
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 *
+	 * @throws Exception
+	 */
+	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options) {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+
+		$this->fillTableStreamHashtags($schema);
+	}
+
+	/**
+	 * @param ISchemaWrapper $schema
+	 */
+	private function fillTableStreamHashtags(ISchemaWrapper $schema) {
+
+		$start = 0;
+		$limit = 1000;
+		while (true) {
+			$qb = $this->connection->getQueryBuilder();
+			$qb->select('id', 'hashtags')
+			   ->from('social_a2_stream')
+			   ->setMaxResults(1000)
+			   ->setFirstResult($start);
+
+			$cursor = $qb->execute();
+			$count = 0;
+			while ($data = $cursor->fetch()) {
+				$count++;
+
+				$this->updateStreamTags($data);
+			}
+			$cursor->closeCursor();
+
+			$start += $count;
+			if ($count < $limit) {
+				break;
+			}
+		}
+	}
+
+
+	/**
+	 * @param array $data
+	 */
+	private function updateStreamTags(array $data) {
+		if ($data['hashtags'] === '' || $data['hashtags'] === null) {
+			return;
+		}
+
+		$id = $data['id'];
+		$tags = json_decode($data['hashtags'], true);
+
+		foreach ($tags as $tag) {
+			if ($tag === '') {
+				continue;
+			}
+			$insert = $this->connection->getQueryBuilder();
+			$insert->insert('social_a2_stream_tags');
+
+			$insert->setValue('stream_id', $insert->createNamedParameter(hash('sha512', $id)));
+			$insert->setValue('hashtag', $insert->createNamedParameter($tag));
+			try {
+				$insert->execute();
+			} catch (UniqueConstraintViolationException $e) {
+			}
+		}
+
+	}
+
+}