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<?php
namespace Digitigrade\Model;
use Digitigrade\RpcException;
use Digitigrade\RpcReceiver;
class Actor extends PushableModel implements RpcReceiver {
public ?int $id;
public string $uri;
public bool $isLocal = false;
public \DateTimeImmutable $created;
public ?\DateTimeImmutable $modified;
public ?string $homepage;
public string $handle;
public string $displayName;
public ?string $avatar;
public ?string $bio;
public ?string $pronouns;
public bool $automated = false;
public bool $requestToFollow = false;
public ActorEndpoints $endpoints;
public array $extensions = [];
/**
* Creates and saves a new local actor with the specified fields pre-set
* @param string $handle handle local part
* @param ?string $displayName display name (default = same as handle)
* @param ?string $bio biography / description
* @param bool $automated is this account automated? (e.g. a bot)
* @param bool $requestToFollow does this account check follow requests manually?
* @return self
*/
public static function create(
string $handle,
?string $displayName = null,
?string $bio = null,
bool $automated = false,
bool $requestToFollow = true // setting this true by default as i think it's better for privacy
): self {
if (self::findLocalByHandle($handle) != null) {
throw new \RuntimeException('an actor with that local handle already exists!');
}
$actor = new self();
$actor->uri = path_to_uri("/user/$handle");
$actor->isLocal = true;
$date = new \DateTimeImmutable();
$actor->created = $date;
$actor->modified = $date;
// don't really need to set this as it's generated by the view at /user/:handle
$actor->homepage = path_to_uri("/@/$handle");
$actor->handle = $handle;
$actor->displayName = $displayName ?? $handle;
$actor->bio = $bio;
$actor->automated = $automated;
$actor->requestToFollow = $requestToFollow;
// don't actually need to set these either
// just need to set the basicFeed since it's a required field
$actor->endpoints = new ActorEndpoints();
$actor->endpoints->basicFeed = path_to_uri("/user/$handle/basicFeed");
$actor->save();
return $actor;
}
protected function getUpdateWhereClause(\PDO $db): ?string {
if (self::findWhere('uri = ?', [$this->uri]) != null)
return 'uri = ' . $db->quote($this->uri);
if (self::findWhere('id = ?', [$this->id]) != null)
return "id = $this->id";
return null;
}
public static function findLocalByHandle(string $handle): ?self {
return self::findWhere('is_local = true AND handle = ?', [$handle]);
}
public static function findByWebfinger(string $acct, bool $autoSave = true, bool $forceRefetch = false): ?self {
// normalise uri
if (!str_starts_with($acct, 'acct:')) {
if (str_starts_with($acct, '@')) {
$acct = substr($acct, 1);
}
$acct = "acct:$acct";
}
// fetch it
return ActorWebfinger::findByAcct($acct, $autoSave, $forceRefetch)->actor;
}
public static function findByRequestHeaders(): ?self {
$instance = Instance::findByRequestHeaders();
if ($instance == null || !isset($_SERVER['HTTP_X_PAWPUB_ACTOR']))
return null;
$uri = $_SERVER['HTTP_X_PAWPUB_ACTOR'];
if (hostname_from_uri($uri) != $instance->domain)
return null;
return self::findByUri($uri);
}
public function rpcCall(string $method, array $args) {
switch ($method) {
case 'follow': // $this is the target, $args[0] is the initiator
$status = $this->requestToFollow ? FollowRelationStatus::PENDING : FollowRelationStatus::ACTIVE;
if (!$this->isLocal) {
$endpoint = $this->endpoints->follow ?? null;
if (!isset($endpoint, $this->endpoints->unfollow)) {
throw new RpcException("Actor `$this->uri` has no (un)follow endpoint");
}
$result = send_request_authenticated($endpoint, method: 'POST', actingAs: $args[0]);
if (!str_contains($result->headers[0], ' 20')) {
throw new RpcException('remote call did not indicate success: ' . $result->headers[0]);
}
}
FollowRelation::create($args[0], $this, $status);
return $status;
case 'unfollow':
if (!$this->isLocal) {
$endpoint = $this->endpoints->unfollow ?? null;
if (!isset($endpoint, $this->endpoints->follow)) {
throw new RpcException("Actor `$this->uri` has no (un)follow endpoint");
}
$result = send_request_authenticated($endpoint, method: 'POST', actingAs: $args[0]);
if (!str_contains($result->headers[0], ' 20')) {
throw new RpcException('remote call did not indicate success: ' . $result->headers[0]);
}
}
FollowRelation::findByActors($args[0], $this)->remove();
return;
default:
throw new \RuntimeException("Actor rpc method $method not (yet?) implemented");
}
}
/**
* Tries to follow (or send a follow request to) another actor
* @param Actor $target the actor to follow
* @return FollowRelationStatus PENDING if a request was sent or ACTIVE if the follow went through immediately
*/
public function follow(self $target): FollowRelationStatus {
return $target->rpcCall('follow', [$this]);
}
public function unfollow(self $target) {
$target->rpcCall('unfollow', [$this]);
}
public function jsonSerialize(): array {
return [
'type' => 'actor',
'self' => path_to_uri("/user/$this->handle"),
'created' => $this->created?->format('c'),
'modified' => $this->modified?->format('c'),
'homepage' => path_to_uri("/@/$this->handle"),
'handle' => $this->handle,
'displayName' => $this->displayName,
'avatar' => $this->avatar,
'bio' => $this->bio,
'pronouns' => $this->pronouns,
'automated' => $this->automated,
'requestToFollow' => $this->requestToFollow,
'endpoints' => [
'basicFeed' => path_to_uri("/user/$this->handle/basicFeed"),
'fullFeed' => path_to_uri("/user/$this->handle/fullFeed"),
'follow' => path_to_uri("/user/$this->handle/follow"),
'unfollow' => path_to_uri("/user/$this->handle/unfollow"),
]
];
}
public function hydrate() {
$this->endpoints = ActorEndpoints::findWhere('actor_id = ?', [$this->id]);
}
}
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