- /**
- * Fetches the followers of a given profile and adds them
- *
- * @param string $url URL of a profile
- * @return void
- */
- public static function discoverFollowers(string $url, int $following_gcid = 0, int $follower_gcid = 0)
- {
- $gcontact = DBA::selectFirst('gcontact', ['id', 'last_discovery'], ['nurl' => Strings::normaliseLink(($url))]);
- if (!DBA::isResult($gcontact)) {
- return;
- }
-
- if ($gcontact['last_discovery'] > DateTimeFormat::utc('now - 1 month')) {
- Logger::info('Last discovery was less then a month before.', ['url' => $url, 'discovery' => $gcontact['last_discovery']]);
- return;
- }
-
- $gcid = $gcontact['id'];
-
- if (!empty($following_gcid)) {
- $fields = ['gcid' => $following_gcid, 'follower-gcid' => $gcid];
- Logger::info('Set relation for followed gcontact', $fields);
- DBA::update('gfollower', ['deleted' => false], $fields, true);
- } elseif (!empty($follower_gcid)) {
- $fields = ['gcid' => $gcid, 'follower-gcid' => $follower_gcid];
- Logger::info('Set relation for following gcontact', $fields);
- DBA::update('gfollower', ['deleted' => false], $fields, true);
- }
-
- $apcontact = APContact::getByURL($url);
-
- if (!empty($apcontact['followers']) && is_string($apcontact['followers'])) {
- $followers = ActivityPub::fetchItems($apcontact['followers']);
- } else {
- $followers = [];
- }
-
- if (!empty($apcontact['following']) && is_string($apcontact['following'])) {
- $followings = ActivityPub::fetchItems($apcontact['following']);
- } else {
- $followings = [];
- }
-
- if (!empty($followers) || !empty($followings)) {
- if (!empty($followers)) {
- // Clear the follower list, since it will be recreated in the next step
- DBA::update('gfollower', ['deleted' => true], ['gcid' => $gcid]);
- }
-
- $contacts = [];
- foreach (array_merge($followers, $followings) as $contact) {
- if (is_string($contact)) {
- $contacts[] = $contact;
- } elseif (!empty($contact['url']) && is_string($contact['url'])) {
- $contacts[] = $contact['url'];
- }
- }
- $contacts = array_unique($contacts);
-
- Logger::info('Discover AP contacts', ['url' => $url, 'contacts' => count($contacts)]);
- foreach ($contacts as $contact) {
- $gcontact = DBA::selectFirst('gcontact', ['id'], ['nurl' => Strings::normaliseLink(($contact))]);
- if (DBA::isResult($gcontact)) {
- if (in_array($contact, $followers)) {
- $fields = ['gcid' => $gcid, 'follower-gcid' => $gcontact['id']];
- } elseif (in_array($contact, $followings)) {
- $fields = ['gcid' => $gcontact['id'], 'follower-gcid' => $gcid];
- }
- Logger::info('Set relation between contacts', $fields);
- DBA::update('gfollower', ['deleted' => false], $fields, true);
- continue;
- }
-
- $follower_gcid = 0;
- $following_gcid = 0;
-
- if (in_array($contact, $followers)) {
- $following_gcid = $gcid;
- } elseif (in_array($contact, $followings)) {
- $follower_gcid = $gcid;
- }
-
- Logger::info('Discover new AP contact', ['url' => $contact]);
- Worker::add(PRIORITY_LOW, 'UpdateGContact', $contact, '', $following_gcid, $follower_gcid);
- }
- if (!empty($followers)) {
- // Delete all followers that aren't undeleted
- DBA::delete('gfollower', ['gcid' => $gcid, 'deleted' => true]);
- }
-
- DBA::update('gcontact', ['last_discovery' => DateTimeFormat::utcNow()], ['id' => $gcid]);
- Logger::info('AP contacts discovery finished, last discovery set', ['url' => $url]);
- return;
- }
-
- $data = Probe::uri($url);
- if (empty($data['poco'])) {
- return;
- }
-
- $curlResult = Network::curl($data['poco']);
- if (!$curlResult->isSuccess()) {
- return;
- }
- $poco = json_decode($curlResult->getBody(), true);
- if (empty($poco['entry'])) {
- return;
- }
-
- Logger::info('PoCo Discovery started', ['url' => $url, 'contacts' => count($poco['entry'])]);
-
- foreach ($poco['entry'] as $entries) {
- if (!empty($entries['urls'])) {
- foreach ($entries['urls'] as $entry) {
- if ($entry['type'] == 'profile') {
- if (DBA::exists('gcontact', ['nurl' => Strings::normaliseLink(($entry['value']))])) {
- continue;
- }
- Logger::info('Discover new PoCo contact', ['url' => $entry['value']]);
- Worker::add(PRIORITY_LOW, 'UpdateGContact', $entry['value']);
- }
- }
- }
- }
-
- DBA::update('gcontact', ['last_discovery' => DateTimeFormat::utcNow()], ['id' => $gcid]);
- Logger::info('PoCo Discovery finished', ['url' => $url]);
- }
-