namespace Friendica\Core;
+use Friendica\Database\DBA;
use Friendica\DI;
+use Friendica\Model\User;
+use Friendica\Network\HTTPException;
+use Friendica\Protocol\Activity;
+use Friendica\Protocol\ActivityPub;
+use Friendica\Protocol\Diaspora;
+use Friendica\Protocol\OStatus;
+use Friendica\Protocol\Salmon;
/**
* Manage compatibility with federated networks
const PHANTOM = 'unkn'; // Place holder
+ /**
+ * Returns whether the provided protocol supports following
+ *
+ * @param $protocol
+ * @return bool
+ * @throws HTTPException\InternalServerErrorException
+ */
+ public static function supportsFollow($protocol): bool
+ {
+ if (in_array($protocol, self::NATIVE_SUPPORT)) {
+ return true;
+ }
+
+ $hook_data = [
+ 'protocol' => $protocol,
+ 'result' => null
+ ];
+ Hook::callAll('support_follow', $hook_data);
+
+ return $hook_data['result'] === true;
+ }
+
+ /**
+ * Returns whether the provided protocol supports revoking inbound follows
+ *
+ * @param $protocol
+ * @return bool
+ * @throws HTTPException\InternalServerErrorException
+ */
+ public static function supportsRevokeFollow($protocol): bool
+ {
+ if (in_array($protocol, self::NATIVE_SUPPORT)) {
+ return true;
+ }
+
+ $hook_data = [
+ 'protocol' => $protocol,
+ 'result' => null
+ ];
+ Hook::callAll('support_revoke_follow', $hook_data);
+
+ return $hook_data['result'] === true;
+ }
+
/**
* Returns the address string for the provided profile URL
*
{
return $display_name . ' (' . self::getAddrFromProfileUrl($profile_url) . ')';
}
+
+ /**
+ * Send a follow message to a remote server.
+ *
+ * @param int $uid User Id
+ * @param array $contact Contact being followed
+ * @param ?string $protocol Expected protocol
+ * @return bool Only returns false in the unlikely case an ActivityPub contact ID doesn't exist (???)
+ * @throws HTTPException\InternalServerErrorException
+ * @throws \ImagickException
+ */
+ public static function follow(int $uid, array $contact, ?string $protocol = null): bool
+ {
+ $owner = User::getOwnerDataById($uid);
+ if (!DBA::isResult($owner)) {
+ return true;
+ }
+
+ $protocol = $protocol ?? $contact['protocol'];
+
+ if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
+ // create a follow slap
+ $item = [
+ 'verb' => Activity::FOLLOW,
+ 'gravity' => GRAVITY_ACTIVITY,
+ 'follow' => $contact['url'],
+ 'body' => '',
+ 'title' => '',
+ 'guid' => '',
+ 'uri-id' => 0,
+ ];
+
+ $slap = OStatus::salmon($item, $owner);
+
+ if (!empty($contact['notify'])) {
+ Salmon::slapper($owner, $contact['notify'], $slap);
+ }
+ } elseif ($protocol == Protocol::DIASPORA) {
+ $contact = Diaspora::sendShare($owner, $contact);
+ Logger::notice('share returns: ' . $contact);
+ } elseif ($protocol == Protocol::ACTIVITYPUB) {
+ $activity_id = ActivityPub\Transmitter::activityIDFromContact($contact['id']);
+ if (empty($activity_id)) {
+ // This really should never happen
+ return false;
+ }
+
+ $success = ActivityPub\Transmitter::sendActivity('Follow', $contact['url'], $owner['uid'], $activity_id);
+ Logger::notice('Follow returns: ' . $success);
+ }
+
+ return true;
+ }
+
+ /**
+ * Sends an unfriend message. Does not remove the contact
+ *
+ * @param array $user User unfriending
+ * @param array $contact Contact unfriended
+ * @return bool|null true if successful, false if not, null if no remote action was performed
+ * @throws HTTPException\InternalServerErrorException
+ * @throws \ImagickException
+ */
+ public static function terminateFriendship(array $user, array $contact): ?bool
+ {
+ if (empty($contact['network'])) {
+ throw new \InvalidArgumentException('Missing network key in contact array');
+ }
+
+ $protocol = $contact['network'];
+ if (($protocol == Protocol::DFRN) && !empty($contact['protocol'])) {
+ $protocol = $contact['protocol'];
+ }
+
+ if (in_array($protocol, [Protocol::OSTATUS, Protocol::DFRN])) {
+ // create an unfollow slap
+ $item = [];
+ $item['verb'] = Activity::O_UNFOLLOW;
+ $item['gravity'] = GRAVITY_ACTIVITY;
+ $item['follow'] = $contact['url'];
+ $item['body'] = '';
+ $item['title'] = '';
+ $item['guid'] = '';
+ $item['uri-id'] = 0;
+ $slap = OStatus::salmon($item, $user);
+
+ if (empty($contact['notify'])) {
+ throw new \InvalidArgumentException('Missing expected "notify" key in OStatus/DFRN contact');
+ }
+
+ return Salmon::slapper($user, $contact['notify'], $slap) === 0;
+ } elseif ($protocol == Protocol::DIASPORA) {
+ return Diaspora::sendUnshare($user, $contact) > 0;
+ } elseif ($protocol == Protocol::ACTIVITYPUB) {
+ return ActivityPub\Transmitter::sendContactUndo($contact['url'], $contact['id'], $user['uid']);
+ }
+
+ // Catch-all hook for connector addons
+ $hook_data = [
+ 'contact' => $contact,
+ 'result' => null
+ ];
+ Hook::callAll('unfollow', $hook_data);
+
+ return $hook_data['result'];
+ }
+
+ /**
+ * Revoke an incoming follow from the provided contact
+ *
+ * @param array $contact Private contact (uid != 0) array
+ * @return bool|null true if successful, false if not, null if no action was performed
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ * @throws \ImagickException
+ */
+ public static function revokeFollow(array $contact): ?bool
+ {
+ if (empty($contact['network'])) {
+ throw new \InvalidArgumentException('Missing network key in contact array');
+ }
+
+ $protocol = $contact['network'];
+ if ($protocol == Protocol::DFRN && !empty($contact['protocol'])) {
+ $protocol = $contact['protocol'];
+ }
+
+ if ($protocol == Protocol::ACTIVITYPUB) {
+ return ActivityPub\Transmitter::sendContactReject($contact['url'], $contact['hub-verify'], $contact['uid']);
+ }
+
+ // Catch-all hook for connector addons
+ $hook_data = [
+ 'contact' => $contact,
+ 'result' => null,
+ ];
+ Hook::callAll('revoke_follow', $hook_data);
+
+ return $hook_data['result'];
+ }
+
+ /**
+ * Send a block message to a remote server. Only useful for connector addons.
+ *
+ * @param array $contact Public contact record to block
+ * @param int $uid User issuing the block
+ * @return bool|null true if successful, false if not, null if no action was performed
+ * @throws HTTPException\InternalServerErrorException
+ */
+ public static function block(array $contact, int $uid): ?bool
+ {
+ // Catch-all hook for connector addons
+ $hook_data = [
+ 'contact' => $contact,
+ 'uid' => $uid,
+ 'result' => null,
+ ];
+ Hook::callAll('block', $hook_data);
+
+ return $hook_data['result'];
+ }
+
+ /**
+ * Send an unblock message to a remote server. Only useful for connector addons.
+ *
+ * @param array $contact Public contact record to unblock
+ * @param int $uid User revoking the block
+ * @return bool|null true if successful, false if not, null if no action was performed
+ * @throws HTTPException\InternalServerErrorException
+ */
+ public static function unblock(array $contact, int $uid): ?bool
+ {
+ // Catch-all hook for connector addons
+ $hook_data = [
+ 'contact' => $contact,
+ 'uid' => $uid,
+ 'result' => null,
+ ];
+ Hook::callAll('unblock', $hook_data);
+
+ return $hook_data['result'];
+ }
}