src/Protocol/ActivityPub/Transmitter.php

   1 <?php
   2 /**
   3  * @file src/Protocol/ActivityPub/Transmitter.php
   4  */
   5 namespace Friendica\Protocol\ActivityPub;
   6
   7 use Friendica\BaseObject;
   8 use Friendica\Database\DBA;
   9 use Friendica\Core\Logger;
  10 use Friendica\Core\System;
  11 use Friendica\Util\HTTPSignature;
  12 use Friendica\Core\Protocol;
  13 use Friendica\Model\Conversation;
  14 use Friendica\Model\Contact;
  15 use Friendica\Model\APContact;
  16 use Friendica\Model\Item;
  17 use Friendica\Model\Term;
  18 use Friendica\Model\User;
  19 use Friendica\Util\DateTimeFormat;
  20 use Friendica\Content\Text\BBCode;
  21 use Friendica\Util\JsonLD;
  22 use Friendica\Util\LDSignature;
  23 use Friendica\Model\Profile;
  24 use Friendica\Object\Image;
  25 use Friendica\Protocol\ActivityPub;
  26 use Friendica\Protocol\Diaspora;
  27 use Friendica\Core\Cache;
  28 use Friendica\Util\Map;
  29 use Friendica\Util\Network;
  30
  31 require_once 'include/api.php';
  32
  33 /**
  34  * @brief ActivityPub Transmitter Protocol class
  35  *
  36  * To-Do:
  37  * - Undo Announce
  38  */
  39 class Transmitter
  40 {
  41         /**
  42          * collects the lost of followers of the given owner
  43          *
  44          * @param array   $owner Owner array
  45          * @param integer $page  Page number
  46          *
  47          * @return array of owners
  48          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  49          */
  50         public static function getFollowers($owner, $page = null)
  51         {
  52                 $condition = ['rel' => [Contact::FOLLOWER, Contact::FRIEND], 'network' => Protocol::NATIVE_SUPPORT, 'uid' => $owner['uid'],
  53                         'self' => false, 'deleted' => false, 'hidden' => false, 'archive' => false, 'pending' => false];
  54                 $count = DBA::count('contact', $condition);
  55
  56                 $data = ['@context' => ActivityPub::CONTEXT];
  57                 $data['id'] = System::baseUrl() . '/followers/' . $owner['nickname'];
  58                 $data['type'] = 'OrderedCollection';
  59                 $data['totalItems'] = $count;
  60
  61                 // When we hide our friends we will only show the pure number but don't allow more.
  62                 $profile = Profile::getByUID($owner['uid']);
  63                 if (!empty($profile['hide-friends'])) {
  64                         return $data;
  65                 }
  66
  67                 if (empty($page)) {
  68                         $data['first'] = System::baseUrl() . '/followers/' . $owner['nickname'] . '?page=1';
  69                 } else {
  70                         $list = [];
  71
  72                         $contacts = DBA::select('contact', ['url'], $condition, ['limit' => [($page - 1) * 100, 100]]);
  73                         while ($contact = DBA::fetch($contacts)) {
  74                                 $list[] = $contact['url'];
  75                         }
  76
  77                         if (!empty($list)) {
  78                                 $data['next'] = System::baseUrl() . '/followers/' . $owner['nickname'] . '?page=' . ($page + 1);
  79                         }
  80
  81                         $data['partOf'] = System::baseUrl() . '/followers/' . $owner['nickname'];
  82
  83                         $data['orderedItems'] = $list;
  84                 }
  85
  86                 return $data;
  87         }
  88
  89         /**
  90          * Create list of following contacts
  91          *
  92          * @param array   $owner Owner array
  93          * @param integer $page  Page numbe
  94          *
  95          * @return array of following contacts
  96          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  97          */
  98         public static function getFollowing($owner, $page = null)
  99         {
 100                 $condition = ['rel' => [Contact::SHARING, Contact::FRIEND], 'network' => Protocol::NATIVE_SUPPORT, 'uid' => $owner['uid'],
 101                         'self' => false, 'deleted' => false, 'hidden' => false, 'archive' => false, 'pending' => false];
 102                 $count = DBA::count('contact', $condition);
 103
 104                 $data = ['@context' => ActivityPub::CONTEXT];
 105                 $data['id'] = System::baseUrl() . '/following/' . $owner['nickname'];
 106                 $data['type'] = 'OrderedCollection';
 107                 $data['totalItems'] = $count;
 108
 109                 // When we hide our friends we will only show the pure number but don't allow more.
 110                 $profile = Profile::getByUID($owner['uid']);
 111                 if (!empty($profile['hide-friends'])) {
 112                         return $data;
 113                 }
 114
 115                 if (empty($page)) {
 116                         $data['first'] = System::baseUrl() . '/following/' . $owner['nickname'] . '?page=1';
 117                 } else {
 118                         $list = [];
 119
 120                         $contacts = DBA::select('contact', ['url'], $condition, ['limit' => [($page - 1) * 100, 100]]);
 121                         while ($contact = DBA::fetch($contacts)) {
 122                                 $list[] = $contact['url'];
 123                         }
 124
 125                         if (!empty($list)) {
 126                                 $data['next'] = System::baseUrl() . '/following/' . $owner['nickname'] . '?page=' . ($page + 1);
 127                         }
 128
 129                         $data['partOf'] = System::baseUrl() . '/following/' . $owner['nickname'];
 130
 131                         $data['orderedItems'] = $list;
 132                 }
 133
 134                 return $data;
 135         }
 136
 137         /**
 138          * Public posts for the given owner
 139          *
 140          * @param array   $owner Owner array
 141          * @param integer $page  Page numbe
 142          *
 143          * @return array of posts
 144          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 145          * @throws \ImagickException
 146          */
 147         public static function getOutbox($owner, $page = null)
 148         {
 149                 $public_contact = Contact::getIdForURL($owner['url'], 0, true);
 150
 151                 $condition = ['uid' => 0, 'contact-id' => $public_contact, 'author-id' => $public_contact,
 152                         'private' => false, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT],
 153                         'deleted' => false, 'visible' => true];
 154                 $count = DBA::count('item', $condition);
 155
 156                 $data = ['@context' => ActivityPub::CONTEXT];
 157                 $data['id'] = System::baseUrl() . '/outbox/' . $owner['nickname'];
 158                 $data['type'] = 'OrderedCollection';
 159                 $data['totalItems'] = $count;
 160
 161                 if (empty($page)) {
 162                         $data['first'] = System::baseUrl() . '/outbox/' . $owner['nickname'] . '?page=1';
 163                 } else {
 164                         $list = [];
 165
 166                         $condition['parent-network'] = Protocol::NATIVE_SUPPORT;
 167
 168                         $items = Item::select(['id'], $condition, ['limit' => [($page - 1) * 20, 20], 'order' => ['created' => true]]);
 169                         while ($item = Item::fetch($items)) {
 170                                 $object = self::createObjectFromItemID($item['id']);
 171                                 unset($object['@context']);
 172                                 $list[] = $object;
 173                         }
 174
 175                         if (!empty($list)) {
 176                                 $data['next'] = System::baseUrl() . '/outbox/' . $owner['nickname'] . '?page=' . ($page + 1);
 177                         }
 178
 179                         $data['partOf'] = System::baseUrl() . '/outbox/' . $owner['nickname'];
 180
 181                         $data['orderedItems'] = $list;
 182                 }
 183
 184                 return $data;
 185         }
 186
 187         /**
 188          * Return the ActivityPub profile of the given user
 189          *
 190          * @param integer $uid User ID
 191          * @return array with profile data
 192          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 193          */
 194         public static function getProfile($uid)
 195         {
 196                 $condition = ['uid' => $uid, 'blocked' => false, 'account_expired' => false,
 197                         'account_removed' => false, 'verified' => true];
 198                 $fields = ['guid', 'nickname', 'pubkey', 'account-type', 'page-flags'];
 199                 $user = DBA::selectFirst('user', $fields, $condition);
 200                 if (!DBA::isResult($user)) {
 201                         return [];
 202                 }
 203
 204                 $fields = ['locality', 'region', 'country-name'];
 205                 $profile = DBA::selectFirst('profile', $fields, ['uid' => $uid, 'is-default' => true]);
 206                 if (!DBA::isResult($profile)) {
 207                         return [];
 208                 }
 209
 210                 $fields = ['name', 'url', 'location', 'about', 'avatar', 'photo'];
 211                 $contact = DBA::selectFirst('contact', $fields, ['uid' => $uid, 'self' => true]);
 212                 if (!DBA::isResult($contact)) {
 213                         return [];
 214                 }
 215
 216                 // On old installations and never changed contacts this might not be filled
 217                 if (empty($contact['avatar'])) {
 218                         $contact['avatar'] = $contact['photo'];
 219                 }
 220
 221                 $data = ['@context' => ActivityPub::CONTEXT];
 222                 $data['id'] = $contact['url'];
 223                 $data['diaspora:guid'] = $user['guid'];
 224                 $data['type'] = ActivityPub::ACCOUNT_TYPES[$user['account-type']];
 225                 $data['following'] = System::baseUrl() . '/following/' . $user['nickname'];
 226                 $data['followers'] = System::baseUrl() . '/followers/' . $user['nickname'];
 227                 $data['inbox'] = System::baseUrl() . '/inbox/' . $user['nickname'];
 228                 $data['outbox'] = System::baseUrl() . '/outbox/' . $user['nickname'];
 229                 $data['preferredUsername'] = $user['nickname'];
 230                 $data['name'] = $contact['name'];
 231                 $data['vcard:hasAddress'] = ['@type' => 'vcard:Home', 'vcard:country-name' => $profile['country-name'],
 232                         'vcard:region' => $profile['region'], 'vcard:locality' => $profile['locality']];
 233                 $data['summary'] = $contact['about'];
 234                 $data['url'] = $contact['url'];
 235                 $data['manuallyApprovesFollowers'] = in_array($user['page-flags'], [Contact::PAGE_NORMAL, Contact::PAGE_PRVGROUP]);
 236                 $data['publicKey'] = ['id' => $contact['url'] . '#main-key',
 237                         'owner' => $contact['url'],
 238                         'publicKeyPem' => $user['pubkey']];
 239                 $data['endpoints'] = ['sharedInbox' => System::baseUrl() . '/inbox'];
 240                 $data['icon'] = ['type' => 'Image',
 241                         'url' => $contact['avatar']];
 242
 243                 // tags: https://kitty.town/@inmysocks/100656097926961126.json
 244                 return $data;
 245         }
 246
 247         /**
 248          * Returns an array with permissions of a given item array
 249          *
 250          * @param array $item
 251          *
 252          * @return array with permissions
 253          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 254          * @throws \ImagickException
 255          */
 256         private static function fetchPermissionBlockFromConversation($item)
 257         {
 258                 if (empty($item['thr-parent'])) {
 259                         return [];
 260                 }
 261
 262                 $condition = ['item-uri' => $item['thr-parent'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB];
 263                 $conversation = DBA::selectFirst('conversation', ['source'], $condition);
 264                 if (!DBA::isResult($conversation)) {
 265                         return [];
 266                 }
 267
 268                 $activity = json_decode($conversation['source'], true);
 269
 270                 $actor = JsonLD::fetchElement($activity, 'actor', 'id');
 271                 $profile = APContact::getByURL($actor);
 272
 273                 $item_profile = APContact::getByURL($item['author-link']);
 274                 $exclude[] = $item['author-link'];
 275
 276                 if ($item['gravity'] == GRAVITY_PARENT) {
 277                         $exclude[] = $item['owner-link'];
 278                 }
 279
 280                 $permissions['to'][] = $actor;
 281
 282                 foreach (['to', 'cc', 'bto', 'bcc'] as $element) {
 283                         if (empty($activity[$element])) {
 284                                 continue;
 285                         }
 286                         if (is_string($activity[$element])) {
 287                                 $activity[$element] = [$activity[$element]];
 288                         }
 289
 290                         foreach ($activity[$element] as $receiver) {
 291                                 if ($receiver == $profile['followers'] && !empty($item_profile['followers'])) {
 292                                         $permissions[$element][] = $item_profile['followers'];
 293                                 } elseif (!in_array($receiver, $exclude)) {
 294                                         $permissions[$element][] = $receiver;
 295                                 }
 296                         }
 297                 }
 298                 return $permissions;
 299         }
 300
 301         /**
 302          * Creates an array of permissions from an item thread
 303          *
 304          * @param array   $item
 305          * @param boolean $blindcopy
 306          * @param boolean $last_id
 307          *
 308          * @return array with permission data
 309          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 310          * @throws \ImagickException
 311          */
 312         private static function createPermissionBlockForItem($item, $blindcopy, $last_id = 0)
 313         {
 314                 if ($last_id == 0) {
 315                         $last_id = $item['id'];
 316                 }
 317
 318                 $always_bcc = false;
 319
 320                 // Check if we should always deliver our stuff via BCC
 321                 if (!empty($item['uid'])) {
 322                         $profile = Profile::getByUID($item['uid']);
 323                         if (!empty($profile)) {
 324                                 $always_bcc = $profile['hide-friends'];
 325                         }
 326                 }
 327
 328                 // Will be activated in a later step
 329                 // $networks = [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS];
 330
 331                 // For now only send to these contacts:
 332                 $networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS];
 333
 334                 $data = ['to' => [], 'cc' => [], 'bcc' => []];
 335
 336                 $actor_profile = APContact::getByURL($item['author-link']);
 337
 338                 $terms = Term::tagArrayFromItemId($item['id'], TERM_MENTION);
 339
 340                 if (!$item['private']) {
 341                         $data = array_merge($data, self::fetchPermissionBlockFromConversation($item));
 342
 343                         $data['to'][] = ActivityPub::PUBLIC_COLLECTION;
 344                         if (!empty($actor_profile['followers'])) {
 345                                 $data['cc'][] = $actor_profile['followers'];
 346                         }
 347
 348                         foreach ($terms as $term) {
 349                                 $profile = APContact::getByURL($term['url'], false);
 350                                 if (!empty($profile)) {
 351                                         $data['to'][] = $profile['url'];
 352                                 }
 353                         }
 354                 } else {
 355                         $receiver_list = Item::enumeratePermissions($item);
 356
 357                         $mentioned = [];
 358
 359                         foreach ($terms as $term) {
 360                                 $cid = Contact::getIdForURL($term['url'], $item['uid']);
 361                                 if (!empty($cid) && in_array($cid, $receiver_list)) {
 362                                         $contact = DBA::selectFirst('contact', ['url'], ['id' => $cid, 'network' => $networks]);
 363                                         if (DBA::isResult($contact) && !empty($profile = APContact::getByURL($contact['url'], false))) {
 364                                                 $data['to'][] = $profile['url'];
 365                                         }
 366                                 }
 367                         }
 368
 369                         foreach ($receiver_list as $receiver) {
 370                                 $contact = DBA::selectFirst('contact', ['url', 'hidden'], ['id' => $receiver, 'network' => $networks]);
 371                                 if (DBA::isResult($contact) && !empty($profile = APContact::getByURL($contact['url'], false))) {
 372                                         if ($contact['hidden'] || $always_bcc) {
 373                                                 $data['bcc'][] = $profile['url'];
 374                                         } else {
 375                                                 $data['cc'][] = $profile['url'];
 376                                         }
 377                                 }
 378                         }
 379                 }
 380
 381                 $parents = Item::select(['id', 'author-link', 'owner-link', 'gravity', 'uri'], ['parent' => $item['parent']]);
 382                 while ($parent = Item::fetch($parents)) {
 383                         // Don't include data from future posts
 384                         if ($parent['id'] >= $last_id) {
 385                                 continue;
 386                         }
 387
 388                         $profile = APContact::getByURL($parent['author-link'], false);
 389                         if (!empty($profile)) {
 390                                 if ($parent['uri'] == $item['thr-parent']) {
 391                                         $data['to'][] = $profile['url'];
 392                                 } else {
 393                                         $data['cc'][] = $profile['url'];
 394                                 }
 395                         }
 396
 397                         if ($item['gravity'] != GRAVITY_PARENT) {
 398                                 continue;
 399                         }
 400
 401                         $profile = APContact::getByURL($parent['owner-link'], false);
 402                         if (!empty($profile)) {
 403                                 $data['cc'][] = $profile['url'];
 404                         }
 405                 }
 406                 DBA::close($parents);
 407
 408                 $data['to'] = array_unique($data['to']);
 409                 $data['cc'] = array_unique($data['cc']);
 410                 $data['bcc'] = array_unique($data['bcc']);
 411
 412                 if (($key = array_search($item['author-link'], $data['to'])) !== false) {
 413                         unset($data['to'][$key]);
 414                 }
 415
 416                 if (($key = array_search($item['author-link'], $data['cc'])) !== false) {
 417                         unset($data['cc'][$key]);
 418                 }
 419
 420                 if (($key = array_search($item['author-link'], $data['bcc'])) !== false) {
 421                         unset($data['bcc'][$key]);
 422                 }
 423
 424                 foreach ($data['to'] as $to) {
 425                         if (($key = array_search($to, $data['cc'])) !== false) {
 426                                 unset($data['cc'][$key]);
 427                         }
 428
 429                         if (($key = array_search($to, $data['bcc'])) !== false) {
 430                                 unset($data['bcc'][$key]);
 431                         }
 432                 }
 433
 434                 foreach ($data['cc'] as $cc) {
 435                         if (($key = array_search($cc, $data['bcc'])) !== false) {
 436                                 unset($data['bcc'][$key]);
 437                         }
 438                 }
 439
 440                 $receivers = ['to' => array_values($data['to']), 'cc' => array_values($data['cc']), 'bcc' => array_values($data['bcc'])];
 441
 442                 if (!$blindcopy) {
 443                         unset($receivers['bcc']);
 444                 }
 445
 446                 return $receivers;
 447         }
 448
 449         /**
 450          * Fetches a list of inboxes of followers of a given user
 451          *
 452          * @param integer $uid      User ID
 453          * @param boolean $personal fetch personal inboxes
 454          *
 455          * @return array of follower inboxes
 456          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 457          * @throws \ImagickException
 458          */
 459         public static function fetchTargetInboxesforUser($uid, $personal = false)
 460         {
 461                 $inboxes = [];
 462
 463                 // Will be activated in a later step
 464                 // $networks = [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS];
 465
 466                 // For now only send to these contacts:
 467                 $networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS];
 468
 469                 $condition = ['uid' => $uid, 'network' => $networks, 'archive' => false, 'pending' => false];
 470
 471                 if (!empty($uid)) {
 472                         $condition['rel'] = [Contact::FOLLOWER, Contact::FRIEND];
 473                 }
 474
 475                 $contacts = DBA::select('contact', ['url'], $condition);
 476                 while ($contact = DBA::fetch($contacts)) {
 477                         if (Network::isUrlBlocked($contact['url'])) {
 478                                 continue;
 479                         }
 480
 481                         $profile = APContact::getByURL($contact['url'], false);
 482                         if (!empty($profile)) {
 483                                 if (empty($profile['sharedinbox']) || $personal) {
 484                                         $target = $profile['inbox'];
 485                                 } else {
 486                                         $target = $profile['sharedinbox'];
 487                                 }
 488                                 $inboxes[$target] = $target;
 489                         }
 490                 }
 491                 DBA::close($contacts);
 492
 493                 return $inboxes;
 494         }
 495
 496         /**
 497          * Fetches an array of inboxes for the given item and user
 498          *
 499          * @param array   $item
 500          * @param integer $uid      User ID
 501          * @param boolean $personal fetch personal inboxes
 502          * @param integer $last_id Last item id for adding receivers
 503          *
 504          * @return array with inboxes
 505          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 506          * @throws \ImagickException
 507          */
 508         public static function fetchTargetInboxes($item, $uid, $personal = false, $last_id = 0)
 509         {
 510                 $permissions = self::createPermissionBlockForItem($item, true, $last_id);
 511                 if (empty($permissions)) {
 512                         return [];
 513                 }
 514
 515                 $inboxes = [];
 516
 517                 if ($item['gravity'] == GRAVITY_ACTIVITY) {
 518                         $item_profile = APContact::getByURL($item['author-link'], false);
 519                 } else {
 520                         $item_profile = APContact::getByURL($item['owner-link'], false);
 521                 }
 522
 523                 foreach (['to', 'cc', 'bto', 'bcc'] as $element) {
 524                         if (empty($permissions[$element])) {
 525                                 continue;
 526                         }
 527
 528                         $blindcopy = in_array($element, ['bto', 'bcc']);
 529
 530                         foreach ($permissions[$element] as $receiver) {
 531                                 if (Network::isUrlBlocked($receiver)) {
 532                                         continue;
 533                                 }
 534
 535                                 if ($receiver == $item_profile['followers']) {
 536                                         $inboxes = array_merge($inboxes, self::fetchTargetInboxesforUser($uid, $personal));
 537                                 } else {
 538                                         $profile = APContact::getByURL($receiver, false);
 539                                         if (!empty($profile)) {
 540                                                 if (empty($profile['sharedinbox']) || $personal || $blindcopy) {
 541                                                         $target = $profile['inbox'];
 542                                                 } else {
 543                                                         $target = $profile['sharedinbox'];
 544                                                 }
 545                                                 $inboxes[$target] = $target;
 546                                         }
 547                                 }
 548                         }
 549                 }
 550
 551                 return $inboxes;
 552         }
 553
 554         /**
 555          * Returns the activity type of a given item
 556          *
 557          * @param array $item
 558          *
 559          * @return string with activity type
 560          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 561          * @throws \ImagickException
 562          */
 563         private static function getTypeOfItem($item)
 564         {
 565                 $reshared = false;
 566
 567                 // Only check for a reshare, if it is a real reshare and no quoted reshare
 568                 if (strpos($item['body'], "[share") === 0) {
 569                         $announce = api_share_as_retweet($item);
 570                         $reshared = !empty($announce['plink']);
 571                 }
 572
 573                 if ($reshared) {
 574                         $type = 'Announce';
 575                 } elseif ($item['verb'] == ACTIVITY_POST) {
 576                         if ($item['created'] == $item['edited']) {
 577                                 $type = 'Create';
 578                         } else {
 579                                 $type = 'Update';
 580                         }
 581                 } elseif ($item['verb'] == ACTIVITY_LIKE) {
 582                         $type = 'Like';
 583                 } elseif ($item['verb'] == ACTIVITY_DISLIKE) {
 584                         $type = 'Dislike';
 585                 } elseif ($item['verb'] == ACTIVITY_ATTEND) {
 586                         $type = 'Accept';
 587                 } elseif ($item['verb'] == ACTIVITY_ATTENDNO) {
 588                         $type = 'Reject';
 589                 } elseif ($item['verb'] == ACTIVITY_ATTENDMAYBE) {
 590                         $type = 'TentativeAccept';
 591                 } else {
 592                         $type = '';
 593                 }
 594
 595                 return $type;
 596         }
 597
 598         /**
 599          * Creates the activity or fetches it from the cache
 600          *
 601          * @param integer $item_id
 602          * @param boolean $force Force new cache entry
 603          *
 604          * @return array with the activity
 605          * @throws \Exception
 606          */
 607         public static function createCachedActivityFromItem($item_id, $force = false)
 608         {
 609                 $cachekey = 'APDelivery:createActivity:' . $item_id;
 610
 611                 if (!$force) {
 612                         $data = Cache::get($cachekey);
 613                         if (!is_null($data)) {
 614                                 return $data;
 615                         }
 616                 }
 617
 618                 $data = ActivityPub\Transmitter::createActivityFromItem($item_id);
 619
 620                 Cache::set($cachekey, $data, Cache::QUARTER_HOUR);
 621                 return $data;
 622         }
 623
 624         /**
 625          * Creates an activity array for a given item id
 626          *
 627          * @param integer $item_id
 628          * @param boolean $object_mode Is the activity item is used inside another object?
 629          *
 630          * @return array of activity
 631          * @throws \Exception
 632          */
 633         public static function createActivityFromItem($item_id, $object_mode = false)
 634         {
 635                 $item = Item::selectFirst([], ['id' => $item_id, 'parent-network' => Protocol::NATIVE_SUPPORT]);
 636
 637                 if (!DBA::isResult($item)) {
 638                         return false;
 639                 }
 640
 641                 $condition = ['item-uri' => $item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB];
 642                 $conversation = DBA::selectFirst('conversation', ['source'], $condition);
 643                 if (DBA::isResult($conversation)) {
 644                         $data = json_decode($conversation['source']);
 645                         if (!empty($data)) {
 646                                 return $data;
 647                         }
 648                 }
 649
 650                 $type = self::getTypeOfItem($item);
 651
 652                 if (!$object_mode) {
 653                         $data = ['@context' => ActivityPub::CONTEXT];
 654
 655                         if ($item['deleted'] && ($item['gravity'] == GRAVITY_ACTIVITY)) {
 656                                 $type = 'Undo';
 657                         } elseif ($item['deleted']) {
 658                                 $type = 'Delete';
 659                         }
 660                 } else {
 661                         $data = [];
 662                 }
 663
 664                 $data['id'] = $item['uri'] . '#' . $type;
 665                 $data['type'] = $type;
 666                 $data['actor'] = $item['owner-link'];
 667
 668                 $data['published'] = DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM);
 669
 670                 $data['instrument'] = ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()];
 671
 672                 $data = array_merge($data, self::createPermissionBlockForItem($item, false));
 673
 674                 if (in_array($data['type'], ['Create', 'Update', 'Delete'])) {
 675                         $data['object'] = self::createNote($item);
 676                 } elseif ($data['type'] == 'Announce') {
 677                         $data['object'] = self::createAnnounce($item);
 678                 } elseif ($data['type'] == 'Undo') {
 679                         $data['object'] = self::createActivityFromItem($item_id, true);
 680                 } else {
 681                         $data['diaspora:guid'] = $item['guid'];
 682                         if (!empty($item['signed_text'])) {
 683                                 $data['diaspora:like'] = $item['signed_text'];
 684                         }
 685                         $data['object'] = $item['thr-parent'];
 686                 }
 687
 688                 if (!empty($item['contact-uid'])) {
 689                         $uid = $item['contact-uid'];
 690                 } else {
 691                         $uid = $item['uid'];
 692                 }
 693
 694                 $owner = User::getOwnerDataById($uid);
 695
 696                 if (!$object_mode && !empty($owner)) {
 697                         return LDSignature::sign($data, $owner);
 698                 } else {
 699                         return $data;
 700                 }
 701
 702                 /// @todo Create "conversation" entry
 703         }
 704
 705         /**
 706          * Creates an object array for a given item id
 707          *
 708          * @param integer $item_id
 709          *
 710          * @return array with the object data
 711          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 712          * @throws \ImagickException
 713          */
 714         public static function createObjectFromItemID($item_id)
 715         {
 716                 $item = Item::selectFirst([], ['id' => $item_id, 'parent-network' => Protocol::NATIVE_SUPPORT]);
 717
 718                 if (!DBA::isResult($item)) {
 719                         return false;
 720                 }
 721
 722                 $data = ['@context' => ActivityPub::CONTEXT];
 723                 $data = array_merge($data, self::createNote($item));
 724
 725                 return $data;
 726         }
 727
 728         /**
 729          * Creates a location entry for a given item array
 730          *
 731          * @param array $item
 732          *
 733          * @return array with location array
 734          */
 735         private static function createLocation($item)
 736         {
 737                 $location = ['type' => 'Place'];
 738
 739                 if (!empty($item['location'])) {
 740                         $location['name'] = $item['location'];
 741                 }
 742
 743                 $coord = [];
 744
 745                 if (empty($item['coord'])) {
 746                         $coord = Map::getCoordinates($item['location']);
 747                 } else {
 748                         $coords = explode(' ', $item['coord']);
 749                         if (count($coords) == 2) {
 750                                 $coord = ['lat' => $coords[0], 'lon' => $coords[1]];
 751                         }
 752                 }
 753
 754                 if (!empty($coord['lat']) && !empty($coord['lon'])) {
 755                         $location['latitude'] = $coord['lat'];
 756                         $location['longitude'] = $coord['lon'];
 757                 }
 758
 759                 return $location;
 760         }
 761
 762         /**
 763          * Returns a tag array for a given item array
 764          *
 765          * @param array $item
 766          *
 767          * @return array of tags
 768          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 769          */
 770         private static function createTagList($item)
 771         {
 772                 $tags = [];
 773
 774                 $terms = Term::tagArrayFromItemId($item['id']);
 775                 foreach ($terms as $term) {
 776                         if ($term['type'] == TERM_HASHTAG) {
 777                                 $url = System::baseUrl() . '/search?tag=' . urlencode($term['term']);
 778                                 $tags[] = ['type' => 'Hashtag', 'href' => $url, 'name' => '#' . $term['term']];
 779                         } elseif ($term['type'] == TERM_MENTION) {
 780                                 $contact = Contact::getDetailsByURL($term['url']);
 781                                 if (!empty($contact['addr'])) {
 782                                         $mention = '@' . $contact['addr'];
 783                                 } else {
 784                                         $mention = '@' . $term['url'];
 785                                 }
 786
 787                                 $tags[] = ['type' => 'Mention', 'href' => $term['url'], 'name' => $mention];
 788                         }
 789                 }
 790                 return $tags;
 791         }
 792
 793         /**
 794          * Adds attachment data to the JSON document
 795          *
 796          * @param array  $item Data of the item that is to be posted
 797          * @param string $type Object type
 798          *
 799          * @return array with attachment data
 800          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 801          */
 802         private static function createAttachmentList($item, $type)
 803         {
 804                 $attachments = [];
 805
 806                 $arr = explode('[/attach],', $item['attach']);
 807                 if (count($arr)) {
 808                         foreach ($arr as $r) {
 809                                 $matches = false;
 810                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
 811                                 if ($cnt) {
 812                                         $attributes = ['type' => 'Document',
 813                                                         'mediaType' => $matches[3],
 814                                                         'url' => $matches[1],
 815                                                         'name' => null];
 816
 817                                         if (trim($matches[4]) != '') {
 818                                                 $attributes['name'] = trim($matches[4]);
 819                                         }
 820
 821                                         $attachments[] = $attributes;
 822                                 }
 823                         }
 824                 }
 825
 826                 if ($type != 'Note') {
 827                         return $attachments;
 828                 }
 829
 830                 // Simplify image codes
 831                 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $item['body']);
 832
 833                 // Grab all pictures and create attachments out of them
 834                 if (preg_match_all("/\[img\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures)) {
 835                         foreach ($pictures[1] as $picture) {
 836                                 $imgdata = Image::getInfoFromURL($picture);
 837                                 if ($imgdata) {
 838                                         $attachments[] = ['type' => 'Document',
 839                                                 'mediaType' => $imgdata['mime'],
 840                                                 'url' => $picture,
 841                                                 'name' => null];
 842                                 }
 843                         }
 844                 }
 845
 846                 return $attachments;
 847         }
 848
 849         /**
 850          * @brief Callback function to replace a Friendica style mention in a mention that is used on AP
 851          *
 852          * @param array $match Matching values for the callback
 853          * @return string Replaced mention
 854          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 855          */
 856         private static function mentionCallback($match)
 857         {
 858                 if (empty($match[1])) {
 859                         return;
 860                 }
 861
 862                 $data = Contact::getDetailsByURL($match[1]);
 863                 if (empty($data) || empty($data['nick'])) {
 864                         return;
 865                 }
 866
 867                 return '@[url=' . $data['url'] . ']' . $data['nick'] . '[/url]';
 868         }
 869
 870         /**
 871          * Remove image elements and replaces them with links to the image
 872          *
 873          * @param string $body
 874          *
 875          * @return string with replaced elements
 876          */
 877         private static function removePictures($body)
 878         {
 879                 // Simplify image codes
 880                 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
 881
 882                 $body = preg_replace("/\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]/Usi", '[url]$1[/url]', $body);
 883                 $body = preg_replace("/\[img\]([^\[\]]*)\[\/img\]/Usi", '[url]$1[/url]', $body);
 884
 885                 return $body;
 886         }
 887
 888         /**
 889          * Fetches the "context" value for a givem item array from the "conversation" table
 890          *
 891          * @param array $item
 892          *
 893          * @return string with context url
 894          * @throws \Exception
 895          */
 896         private static function fetchContextURLForItem($item)
 897         {
 898                 $conversation = DBA::selectFirst('conversation', ['conversation-href', 'conversation-uri'], ['item-uri' => $item['parent-uri']]);
 899                 if (DBA::isResult($conversation) && !empty($conversation['conversation-href'])) {
 900                         $context_uri = $conversation['conversation-href'];
 901                 } elseif (DBA::isResult($conversation) && !empty($conversation['conversation-uri'])) {
 902                         $context_uri = $conversation['conversation-uri'];
 903                 } else {
 904                         $context_uri = $item['parent-uri'] . '#context';
 905                 }
 906                 return $context_uri;
 907         }
 908
 909         /**
 910          * Returns if the post contains sensitive content ("nsfw")
 911          *
 912          * @param integer $item_id
 913          *
 914          * @return boolean
 915          * @throws \Exception
 916          */
 917         private static function isSensitive($item_id)
 918         {
 919                 $condition = ['otype' => TERM_OBJ_POST, 'oid' => $item_id, 'type' => TERM_HASHTAG, 'term' => 'nsfw'];
 920                 return DBA::exists('term', $condition);
 921         }
 922
 923         /**
 924          * Creates event data
 925          *
 926          * @param array $item
 927          *
 928          * @return array with the event data
 929          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 930          */
 931         public static function createEvent($item)
 932         {
 933                 $event = [];
 934                 $event['name'] = $item['event-summary'];
 935                 $event['content'] = BBCode::convert($item['event-desc'], false, 7);
 936                 $event['startTime'] = DateTimeFormat::utc($item['event-start'] . '+00:00', DateTimeFormat::ATOM);
 937
 938                 if (!$item['event-nofinish']) {
 939                         $event['endTime'] = DateTimeFormat::utc($item['event-finish'] . '+00:00', DateTimeFormat::ATOM);
 940                 }
 941
 942                 if (!empty($item['event-location'])) {
 943                         $item['location'] = $item['event-location'];
 944                         $event['location'] = self::createLocation($item);
 945                 }
 946
 947                 return $event;
 948         }
 949
 950         /**
 951          * Creates a note/article object array
 952          *
 953          * @param array $item
 954          *
 955          * @return array with the object data
 956          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 957          * @throws \ImagickException
 958          */
 959         public static function createNote($item)
 960         {
 961                 if ($item['event-type'] == 'event') {
 962                         $type = 'Event';
 963                 } elseif (!empty($item['title'])) {
 964                         $type = 'Article';
 965                 } else {
 966                         $type = 'Note';
 967                 }
 968
 969                 if ($item['deleted']) {
 970                         $type = 'Tombstone';
 971                 }
 972
 973                 $data = [];
 974                 $data['id'] = $item['uri'];
 975                 $data['type'] = $type;
 976
 977                 if ($item['deleted']) {
 978                         return $data;
 979                 }
 980
 981                 $data['summary'] = null; // Ignore by now
 982
 983                 if ($item['uri'] != $item['thr-parent']) {
 984                         $data['inReplyTo'] = $item['thr-parent'];
 985                 } else {
 986                         $data['inReplyTo'] = null;
 987                 }
 988
 989                 $data['diaspora:guid'] = $item['guid'];
 990                 $data['published'] = DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM);
 991
 992                 if ($item['created'] != $item['edited']) {
 993                         $data['updated'] = DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM);
 994                 }
 995
 996                 $data['url'] = $item['plink'];
 997                 $data['attributedTo'] = $item['author-link'];
 998                 $data['sensitive'] = self::isSensitive($item['id']);
 999                 $data['context'] = self::fetchContextURLForItem($item);
1000
1001                 if (!empty($item['title'])) {
1002                         $data['name'] = BBCode::toPlaintext($item['title'], false);
1003                 }
1004
1005                 $body = $item['body'];
1006
1007                 if ($type == 'Note') {
1008                         $body = self::removePictures($body);
1009                 }
1010
1011                 if ($type == 'Event') {
1012                         $data = array_merge($data, self::createEvent($item));
1013                 } else {
1014                         $regexp = "/[@!]\[url\=([^\[\]]*)\].*?\[\/url\]/ism";
1015                         $body = preg_replace_callback($regexp, ['self', 'mentionCallback'], $body);
1016
1017                         $data['content'] = BBCode::convert($body, false, 7);
1018                 }
1019
1020                 $data['source'] = ['content' => $item['body'], 'mediaType' => "text/bbcode"];
1021
1022                 if (!empty($item['signed_text']) && ($item['uri'] != $item['thr-parent'])) {
1023                         $data['diaspora:comment'] = $item['signed_text'];
1024                 }
1025
1026                 $data['attachment'] = self::createAttachmentList($item, $type);
1027                 $data['tag'] = self::createTagList($item);
1028
1029                 if (empty($data['location']) && (!empty($item['coord']) || !empty($item['location']))) {
1030                         $data['location'] = self::createLocation($item);
1031                 }
1032
1033                 if (!empty($item['app'])) {
1034                         $data['generator'] = ['type' => 'Application', 'name' => $item['app']];
1035                 }
1036
1037                 $data = array_merge($data, self::createPermissionBlockForItem($item, false));
1038
1039                 return $data;
1040         }
1041
1042         /**
1043          * Creates an announce object entry
1044          *
1045          * @param array $item
1046          *
1047          * @return string with announced object url
1048          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1049          * @throws \ImagickException
1050          */
1051         public static function createAnnounce($item)
1052         {
1053                 $announce = api_share_as_retweet($item);
1054                 if (empty($announce['plink'])) {
1055                         return self::createNote($item);
1056                 }
1057
1058                 // Fetch the original id of the object
1059                 $activity = ActivityPub::fetchContent($announce['plink'], $item['uid']);
1060                 if (!empty($activity)) {
1061                         $ldactivity = JsonLD::compact($activity);
1062                         $id = JsonLD::fetchElement($ldactivity, '@id');
1063                         if (!empty($id)) {
1064                                 return $id;
1065                         }
1066                 }
1067
1068                 return self::createNote($item);
1069         }
1070
1071         /**
1072          * Creates an activity id for a given contact id
1073          *
1074          * @param integer $cid Contact ID of target
1075          *
1076          * @return bool|string activity id
1077          */
1078         public static function activityIDFromContact($cid)
1079         {
1080                 $contact = DBA::selectFirst('contact', ['uid', 'id', 'created'], ['id' => $cid]);
1081                 if (!DBA::isResult($contact)) {
1082                         return false;
1083                 }
1084
1085                 $hash = hash('ripemd128', $contact['uid'].'-'.$contact['id'].'-'.$contact['created']);
1086                 $uuid = substr($hash, 0, 8). '-' . substr($hash, 8, 4) . '-' . substr($hash, 12, 4) . '-' . substr($hash, 16, 4) . '-' . substr($hash, 20, 12);
1087                 return System::baseUrl() . '/activity/' . $uuid;
1088         }
1089
1090         /**
1091          * Transmits a contact suggestion to a given inbox
1092          *
1093          * @param integer $uid           User ID
1094          * @param string  $inbox         Target inbox
1095          * @param integer $suggestion_id Suggestion ID
1096          *
1097          * @return boolean was the transmission successful?
1098          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1099          */
1100         public static function sendContactSuggestion($uid, $inbox, $suggestion_id)
1101         {
1102                 $owner = User::getOwnerDataById($uid);
1103
1104                 $suggestion = DBA::selectFirst('fsuggest', ['url', 'note', 'created'], ['id' => $suggestion_id]);
1105
1106                 $data = ['@context' => ActivityPub::CONTEXT,
1107                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1108                         'type' => 'Announce',
1109                         'actor' => $owner['url'],
1110                         'object' => $suggestion['url'],
1111                         'content' => $suggestion['note'],
1112                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1113                         'to' => [ActivityPub::PUBLIC_COLLECTION],
1114                         'cc' => []];
1115
1116                 $signed = LDSignature::sign($data, $owner);
1117
1118                 Logger::log('Deliver profile deletion for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1119                 return HTTPSignature::transmit($signed, $inbox, $uid);
1120         }
1121
1122         /**
1123          * Transmits a profile relocation to a given inbox
1124          *
1125          * @param integer $uid   User ID
1126          * @param string  $inbox Target inbox
1127          *
1128          * @return boolean was the transmission successful?
1129          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1130          */
1131         public static function sendProfileRelocation($uid, $inbox)
1132         {
1133                 $owner = User::getOwnerDataById($uid);
1134
1135                 $data = ['@context' => ActivityPub::CONTEXT,
1136                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1137                         'type' => 'dfrn:relocate',
1138                         'actor' => $owner['url'],
1139                         'object' => $owner['url'],
1140                         'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1141                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1142                         'to' => [ActivityPub::PUBLIC_COLLECTION],
1143                         'cc' => []];
1144
1145                 $signed = LDSignature::sign($data, $owner);
1146
1147                 Logger::log('Deliver profile relocation for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1148                 return HTTPSignature::transmit($signed, $inbox, $uid);
1149         }
1150
1151         /**
1152          * Transmits a profile deletion to a given inbox
1153          *
1154          * @param integer $uid   User ID
1155          * @param string  $inbox Target inbox
1156          *
1157          * @return boolean was the transmission successful?
1158          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1159          */
1160         public static function sendProfileDeletion($uid, $inbox)
1161         {
1162                 $owner = User::getOwnerDataById($uid);
1163
1164                 $data = ['@context' => ActivityPub::CONTEXT,
1165                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1166                         'type' => 'Delete',
1167                         'actor' => $owner['url'],
1168                         'object' => $owner['url'],
1169                         'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1170                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1171                         'to' => [ActivityPub::PUBLIC_COLLECTION],
1172                         'cc' => []];
1173
1174                 $signed = LDSignature::sign($data, $owner);
1175
1176                 Logger::log('Deliver profile deletion for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1177                 return HTTPSignature::transmit($signed, $inbox, $uid);
1178         }
1179
1180         /**
1181          * Transmits a profile change to a given inbox
1182          *
1183          * @param integer $uid   User ID
1184          * @param string  $inbox Target inbox
1185          *
1186          * @return boolean was the transmission successful?
1187          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1188          * @throws \ImagickException
1189          */
1190         public static function sendProfileUpdate($uid, $inbox)
1191         {
1192                 $owner = User::getOwnerDataById($uid);
1193                 $profile = APContact::getByURL($owner['url']);
1194
1195                 $data = ['@context' => ActivityPub::CONTEXT,
1196                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1197                         'type' => 'Update',
1198                         'actor' => $owner['url'],
1199                         'object' => self::getProfile($uid),
1200                         'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1201                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1202                         'to' => [$profile['followers']],
1203                         'cc' => []];
1204
1205                 $signed = LDSignature::sign($data, $owner);
1206
1207                 Logger::log('Deliver profile update for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1208                 return HTTPSignature::transmit($signed, $inbox, $uid);
1209         }
1210
1211         /**
1212          * Transmits a given activity to a target
1213          *
1214          * @param string  $activity Type name
1215          * @param string  $target   Target profile
1216          * @param integer $uid      User ID
1217          * @return bool
1218          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1219          * @throws \ImagickException
1220          * @throws \Exception
1221          */
1222         public static function sendActivity($activity, $target, $uid, $id = '')
1223         {
1224                 $profile = APContact::getByURL($target);
1225
1226                 $owner = User::getOwnerDataById($uid);
1227
1228                 if (empty($id)) {
1229                         $id = System::baseUrl() . '/activity/' . System::createGUID();
1230                 }
1231
1232                 $data = ['@context' => ActivityPub::CONTEXT,
1233                         'id' => $id,
1234                         'type' => $activity,
1235                         'actor' => $owner['url'],
1236                         'object' => $profile['url'],
1237                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1238                         'to' => [$profile['url']]];
1239
1240                 Logger::log('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid, Logger::DEBUG);
1241
1242                 $signed = LDSignature::sign($data, $owner);
1243                 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1244         }
1245
1246         /**
1247          * Transmit a message that the contact request had been accepted
1248          *
1249          * @param string  $target Target profile
1250          * @param         $id
1251          * @param integer $uid    User ID
1252          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1253          * @throws \ImagickException
1254          */
1255         public static function sendContactAccept($target, $id, $uid)
1256         {
1257                 $profile = APContact::getByURL($target);
1258
1259                 $owner = User::getOwnerDataById($uid);
1260                 $data = ['@context' => ActivityPub::CONTEXT,
1261                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1262                         'type' => 'Accept',
1263                         'actor' => $owner['url'],
1264                         'object' => ['id' => $id, 'type' => 'Follow',
1265                                 'actor' => $profile['url'],
1266                                 'object' => $owner['url']],
1267                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1268                         'to' => [$profile['url']]];
1269
1270                 Logger::log('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
1271
1272                 $signed = LDSignature::sign($data, $owner);
1273                 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1274         }
1275
1276         /**
1277          * Reject a contact request or terminates the contact relation
1278          *
1279          * @param string  $target Target profile
1280          * @param         $id
1281          * @param integer $uid    User ID
1282          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1283          * @throws \ImagickException
1284          */
1285         public static function sendContactReject($target, $id, $uid)
1286         {
1287                 $profile = APContact::getByURL($target);
1288
1289                 $owner = User::getOwnerDataById($uid);
1290                 $data = ['@context' => ActivityPub::CONTEXT,
1291                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1292                         'type' => 'Reject',
1293                         'actor' => $owner['url'],
1294                         'object' => ['id' => $id, 'type' => 'Follow',
1295                                 'actor' => $profile['url'],
1296                                 'object' => $owner['url']],
1297                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1298                         'to' => [$profile['url']]];
1299
1300                 Logger::log('Sending reject to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
1301
1302                 $signed = LDSignature::sign($data, $owner);
1303                 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1304         }
1305
1306         /**
1307          * Transmits a message that we don't want to follow this contact anymore
1308          *
1309          * @param string  $target Target profile
1310          * @param integer $uid    User ID
1311          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1312          * @throws \ImagickException
1313          * @throws \Exception
1314          */
1315         public static function sendContactUndo($target, $cid, $uid)
1316         {
1317                 $profile = APContact::getByURL($target);
1318
1319                 $object_id = self::activityIDFromContact($cid);
1320                 if (empty($object_id)) {
1321                         return;
1322                 }
1323
1324                 $id = System::baseUrl() . '/activity/' . System::createGUID();
1325
1326                 $owner = User::getOwnerDataById($uid);
1327                 $data = ['@context' => ActivityPub::CONTEXT,
1328                         'id' => $id,
1329                         'type' => 'Undo',
1330                         'actor' => $owner['url'],
1331                         'object' => ['id' => $object_id, 'type' => 'Follow',
1332                                 'actor' => $owner['url'],
1333                                 'object' => $profile['url']],
1334                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1335                         'to' => [$profile['url']]];
1336
1337                 Logger::log('Sending undo to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
1338
1339                 $signed = LDSignature::sign($data, $owner);
1340                 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1341         }
1342 }