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<?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 OCA\Social\Db\HashtagsRequest;
use OCA\Social\Db\StreamRequest;
use OCA\Social\Exceptions\HashtagDoesNotExistException;
use OCA\Social\Exceptions\ItemUnknownException;
use OCA\Social\Exceptions\SocialAppConfigException;
use OCA\Social\Model\ActivityPub\Object\Note;
use OCA\Social\Tools\Exceptions\DateTimeException;
use OCA\Social\Tools\Traits\TArrayTools;
class HashtagService {
public const TREND_1H = 3600;
public const TREND_12H = 43200;
public const TREND_1D = 86400;
public const TREND_3D = 259200;
public const TREND_10D = 864000;
use TArrayTools;
private HashtagsRequest $hashtagsRequest;
private StreamRequest $streamRequest;
private ConfigService $configService;
private MiscService $miscService;
/**
* ImportService constructor.
*
* @param HashtagsRequest $hashtagsRequest
* @param StreamRequest $streamRequest
* @param ConfigService $configService
* @param MiscService $miscService
*/
public function __construct(
HashtagsRequest $hashtagsRequest, StreamRequest $streamRequest,
ConfigService $configService,
MiscService $miscService
) {
$this->hashtagsRequest = $hashtagsRequest;
$this->streamRequest = $streamRequest;
$this->configService = $configService;
$this->miscService = $miscService;
}
/*
* note: trend is:
* [
* '1h' => x,
* '12h' => x,
* '1d' => x,
* '3d' => x,
* '10d' => x
* ]
*/
/**
* @return int
* @throws DateTimeException
* @throws ItemUnknownException
* @throws SocialAppConfigException
*/
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 string $hashtag
*
* @return array
* @throws HashtagDoesNotExistException
*/
public function getHashtag(string $hashtag): array {
if (substr($hashtag, 0, 1) !== '#') {
$hashtag = '#' . $hashtag;
}
return $this->hashtagsRequest->getHashtag($hashtag);
}
/**
* @param string $hashtag
* @param bool $all
*
* @return array
*/
public function searchHashtags(string $hashtag, bool $all = false): array {
return $this->hashtagsRequest->searchHashtags($hashtag, $all);
}
/**
* @param int $timestamp
*
* @return int[]
* @throws DateTimeException
* @psalm-return array<int>
*/
private function getTrendSince(int $timestamp): array {
$result = [];
$notes = $this->streamRequest->getNoteSince($timestamp);
foreach ($notes as $note) {
/** @var Note $note */
foreach ($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();
}
}
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