[MM-42742] Add top reactions endpoint (#19850)

store/sqlstore/reaction_store.go

@@ -228,6 +228,121 @@ func (s *SqlReactionStore) PermanentDeleteBatch(endTime int64, limit int64) (int
 	return rowsAffected, nil
 }
 
+// GetTopForTeamSince returns the instance counts of the following Reactions sets:
+// a) those created by anyone in private channels in the given user's membership graph on the given team, and
+// b) those created by anyone in public channels on the given team.
+func (s *SqlReactionStore) GetTopForTeamSince(teamID string, userID string, since int64, offset int, limit int) (*model.TopReactionList, error) {
+	var reactions []*model.TopReaction
+
+	query := `
+		SELECT
+			EmojiName,
+			sum(EmojiCount) AS Count
+		FROM ((
+				SELECT
+					EmojiName,
+					count(EmojiName) AS EmojiCount
+				FROM
+					ChannelMembers
+					INNER JOIN Channels ON ChannelMembers.ChannelId = Channels.Id
+					INNER JOIN Posts ON Channels.Id = Posts.ChannelId
+					INNER JOIN Reactions ON Posts.Id = Reactions.PostId
+				WHERE
+					Reactions.DeleteAt = 0
+					AND ChannelMembers.UserId = ?
+					AND Channels.Type = 'P'
+					AND Channels.TeamId = ?
+					AND Reactions.CreateAt > ?
+				GROUP BY
+					Reactions.EmojiName)
+			UNION ALL (
+				SELECT
+					EmojiName,
+					count(EmojiName) AS EmojiCount
+				FROM
+					Reactions
+					INNER JOIN Posts ON Reactions.PostId = Posts.Id
+					INNER JOIN Channels ON Posts.ChannelId = Channels.Id
+				WHERE
+					Reactions.DeleteAt = 0
+					AND Channels.Type = 'O'
+					AND Channels.TeamId = ?
+					AND Reactions.CreateAt > ?
+				GROUP BY
+					Reactions.EmojiName)) AS A
+		GROUP BY
+			EmojiName
+		ORDER BY
+			Count DESC,
+			EmojiName ASC
+		LIMIT ?
+		OFFSET ?`
+
+	if err := s.GetReplicaX().Select(&reactions, query, userID, teamID, since, teamID, since, limit+1, offset); err != nil {
+		return nil, errors.Wrap(err, "failed to get top Reactions")
+	}
+
+	return model.GetTopReactionListWithRankAndPagination(reactions, limit, offset), nil
+}
+
+// GetTopForUserSince returns the instance counts of the following Reactions sets:
+// a) those created by the given user in any channel type on the given team (across the workspace if no team is given), and
+// b) those created by the given user in DM or group channels.
+func (s *SqlReactionStore) GetTopForUserSince(userID string, teamID string, since int64, offset int, limit int) (*model.TopReactionList, error) {
+	var reactions []*model.TopReaction
+	var args []interface{}
+	var query string
+
+	if teamID != "" {
+		query = `
+		SELECT
+			EmojiName,
+			count(EmojiName) AS Count
+		FROM
+			Reactions
+			INNER JOIN Posts ON Reactions.PostId = Posts.Id
+			INNER JOIN Channels ON Posts.ChannelId = Channels.Id
+		WHERE
+			Reactions.DeleteAt = 0
+			AND Reactions.UserId = ?
+			AND (Channels.TeamId = ? OR Channels.Type = 'D' OR Channels.Type = 'G')
+			AND Reactions.CreateAt > ?
+		GROUP BY
+			EmojiName
+		ORDER BY
+			Count DESC,
+			EmojiName ASC
+		LIMIT ?
+		OFFSET ?`
+		args = []interface{}{userID, teamID, since, limit + 1, offset}
+	} else {
+		query = `
+			SELECT
+				EmojiName,
+				count(EmojiName) AS Count
+			FROM
+				Reactions
+			WHERE
+				Reactions.DeleteAt = 0
+				AND Reactions.UserId = ?
+				AND Reactions.CreateAt > ?
+			GROUP BY
+				Reactions.EmojiName
+			ORDER BY
+				Count DESC,
+				EmojiName ASC
+			LIMIT ?
+			OFFSET ?`
+		args = []interface{}{userID, since, limit + 1, offset}
+	}
+
+	if err := s.GetReplicaX().Select(&reactions, query, args...); err != nil {
+		return nil, errors.Wrap(err, "failed to get top Reactions")
+	}
+
+	return model.GetTopReactionListWithRankAndPagination(reactions, limit, offset), nil
+}
+
 func (s *SqlReactionStore) saveReactionAndUpdatePost(transaction *sqlxTxWrapper, reaction *model.Reaction) error {
 	reaction.DeleteAt = 0