139 lines
4.3 KiB
PHP
139 lines
4.3 KiB
PHP
<?php
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namespace App\Types;
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use App\Models\Actor;
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use App\Models\Activity;
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use GuzzleHttp\Client;
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use Illuminate\Support\Facades\Log;
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class TypeActivity {
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public static function craft_response (Activity $activity)
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{
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$crafted_activity = [
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"@context" => "https://www.w3.org/ns/activitystreams",
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"id" => $activity->activity_id,
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"type" => $activity->type,
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"actor" => $activity->actor,
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"object" => $activity->object,
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];
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if ($activity->target)
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{
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$crafted_activity["target"] = $activity->target;
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}
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if ($activity->summary)
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{
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$crafted_activity["summary"] = $activity->summary;
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}
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return $crafted_activity;
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}
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public static function craft_accept (Activity $activity)
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{
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$accept_activity = new Activity ();
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$accept_activity->activity_id = env ("APP_URL") . "/activity/" . uniqid ();
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$accept_activity->type = "Accept";
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$accept_activity->actor = $activity->object;
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$accept_activity->object = TypeActivity::craft_response ($activity);
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$accept_activity->save ();
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return $accept_activity;
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}
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public static function craft_undo (Activity $activity, Actor $self)
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{
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$undo_activity = new Activity ();
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$undo_activity->activity_id = env ("APP_URL") . "/activity/" . uniqid ();
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$undo_activity->type = "Undo";
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$undo_activity->actor = $self->actor_id;
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$undo_activity->object = $activity;
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$undo_activity->save ();
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return $undo_activity;
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}
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public static function craft_follow (Actor $actor, Actor $object)
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{
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$follow_activity = new Activity ();
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$follow_activity->activity_id = env ("APP_URL") . "/activity/" . uniqid ();
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$follow_activity->type = "Follow";
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$follow_activity->actor = $actor->actor_id;
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$follow_activity->object = $object->actor_id;
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$follow_activity->save ();
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return $follow_activity;
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}
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public static function craft_signed_headers ($activity, Actor $source, Actor $target)
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{
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if (!$source->user)
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{
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Log::error ("Source not found");
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return null;
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}
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$key_id = $source->actor_id . "#main-key";
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$signer = openssl_get_privatekey ($source->private_key);
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$date = gmdate ("D, d M Y H:i:s \G\M\T");
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// we suppose that the activity is already json encoded
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$hash = hash ("sha256", $activity, true);
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$digest = base64_encode ($hash);
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$url = parse_url ($target->inbox);
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$string_to_sign = "(request-target): post ". $url["path"] . "\nhost: " . $url["host"] . "\ndate: " . $date . "\ndigest: SHA-256=" . $digest;
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openssl_sign ($string_to_sign, $signature, $signer, OPENSSL_ALGO_SHA256);
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$signature_b64 = base64_encode ($signature);
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$signature_header = 'keyId="' . $key_id . '",algorithm="rsa-sha256",headers="(request-target) host date digest",signature="' . $signature_b64 . '"';
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return [
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"Host" => $url["host"],
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"Date" => $date,
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"Digest" => "SHA-256=" . $digest,
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"Signature" => $signature_header,
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"Content-Type" => "application/activity+json",
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"Accept" => "application/activity+json",
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];
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}
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public static function post_activity (Activity $activity, Actor $source, Actor $target)
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{
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$crafted_activity = TypeActivity::craft_response ($activity);
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$activity_json = json_encode ($crafted_activity, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_PRESERVE_ZERO_FRACTION);
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$activity_json = mb_convert_encoding ($activity_json, "UTF-8");
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$headers = TypeActivity::craft_signed_headers ($activity_json, $source, $target);
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try {
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$client = new Client ();
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$response = $client->post ($target->inbox, [
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"headers" => $headers,
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"body" => $activity_json,
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"debug" => true
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]);
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}
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catch (RequestException $e)
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{
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Log::error ($e->getMessage ());
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return null;
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}
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return $response;
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}
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// some little functions
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public static function activity_exists ($activity_id)
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{
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return Activity::where ("activity_id", $activity_id)->first ();
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}
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}
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