fill the server_hashtags with hashtags and trends

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

1 files changed, 208 insertions, 0 deletions

diff --git a/lib/Service/HashtagService.php b/lib/Service/HashtagService.php
new file mode 100644
index 00000000..14dcd4b4
--- /dev/null
+++ b/lib/Service/HashtagService.php
@@ -0,0 +1,208 @@
+<?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\Service;
+
+
+use daita\MySmallPhpTools\Traits\TArrayTools;
+use OCA\Social\Db\HashtagsRequest;
+use OCA\Social\Db\NotesRequest;
+use OCA\Social\Exceptions\HashtagDoesNotExistException;
+
+
+class HashtagService {
+
+
+	const TREND_1H = 3600;
+	const TREND_12H = 43200;
+	const TREND_1D = 86400;
+	const TREND_3D = 259200;
+	const TREND_10D = 864000;
+
+
+	use TArrayTools;
+
+
+	/** @var HashtagsRequest */
+	private $hashtagsRequest;
+
+	/** @var NotesRequest */
+	private $notesRequest;
+
+	/** @var ConfigService */
+	private $configService;
+
+	/** @var MiscService */
+	private $miscService;
+
+
+	/**
+	 * ImportService constructor.
+	 *
+	 * @param HashtagsRequest $hashtagsRequest
+	 * @param NotesRequest $notesRequest
+	 * @param ConfigService $configService
+	 * @param MiscService $miscService
+	 */
+	public function __construct(
+		HashtagsRequest $hashtagsRequest, NotesRequest $notesRequest, ConfigService $configService,
+		MiscService $miscService
+	) {
+		$this->hashtagsRequest = $hashtagsRequest;
+		$this->notesRequest = $notesRequest;
+		$this->configService = $configService;
+		$this->miscService = $miscService;
+	}
+
+	/*
+	 * note: trend is:
+	 * [
+	 *   '1h' => x,
+	 *   '12h' => x,
+	 *   '1d' => x,
+	 *   '3d' => x,
+	 *   '10d' => x
+	 * ]
+	 */
+
+	/**
+	 *
+	 */
+	public function manageHashtags(): int {
+		$current = $this->hashtagsRequest->getAll();
+
+		$time = time();
+		$hashtags = [
+			'1h'  => $this->getTrendSince($time - self::TREND_1H),
+			'12h' => $this->getTrendSince($time - self::TREND_12H),
+			'1d'  => $this->getTrendSince($time - self::TREND_1D),
+			'3d'  => $this->getTrendSince($time - self::TREND_3D),
+			'10d' => $this->getTrendSince($time - self::TREND_10D)
+		];
+
+		$count = 0;
+		$formatted = $this->formatTrend($hashtags);
+		foreach ($formatted as $hashtag => $trend) {
+			$count++;
+			try {
+				$this->getFromList($current, $hashtag);
+				$this->hashtagsRequest->update($hashtag, $trend);
+			} catch (HashtagDoesNotExistException $e) {
+				$this->hashtagsRequest->save($hashtag, $trend);
+			}
+		}
+
+		return $count;
+	}
+
+
+	/**
+	 * @param int $timestamp
+	 *
+	 * @return array
+	 */
+	private function getTrendSince(int $timestamp): array {
+		$result = [];
+
+		$notes = $this->notesRequest->getNotesSince($timestamp);
+		foreach ($notes as $note) {
+
+			foreach ($note->getHashtags() as $hashtag) {
+				if (array_key_exists($hashtag, $result)) {
+					$result[$hashtag]++;
+				} else {
+					$result[$hashtag] = 1;
+				}
+			}
+		}
+
+		return $result;
+	}
+
+
+	/**
+	 * @param array $hashtags
+	 *
+	 * @return array
+	 */
+	private function formatTrend(array $hashtags): array {
+		$trends = [];
+		foreach (end($hashtags) as $hashtag => $count) {
+			$trends[$hashtag] = [];
+		}
+
+		$all = array_keys($trends);
+		$periods = array_keys($hashtags);
+		foreach ($all as $hashtag) {
+			foreach ($periods as $period) {
+				$count = $this->countFromList($hashtags[$period], $hashtag);
+				$trends[$hashtag][$period] = $count;
+			}
+		}
+
+		return $trends;
+	}
+
+
+	/**
+	 * @param array $list
+	 * @param string $hashtag
+	 *
+	 * @return int
+	 */
+	private function countFromList(array $list, string $hashtag): int {
+		foreach ($list as $key => $count) {
+			if ($key === $hashtag) {
+				return $count;
+			}
+		}
+
+		return 0;
+	}
+
+
+	/**
+	 * @param array $list
+	 * @param string $hashtag
+	 *
+	 * @return array
+	 * @throws HashtagDoesNotExistException
+	 */
+	private function getFromList(array $list, string $hashtag): array {
+		foreach ($list as $item) {
+			if ($this->get('hashtag', $item, '') === $hashtag) {
+				return $item;
+			}
+		}
+
+		throw new HashtagDoesNotExistException();
+	}
+}
+