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'], [User::PAGE_FLAGS_NORMAL, User::PAGE_FLAGS_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                         foreach ($terms as $term) {
 358                                 $cid = Contact::getIdForURL($term['url'], $item['uid']);
 359                                 if (!empty($cid) && in_array($cid, $receiver_list)) {
 360                                         $contact = DBA::selectFirst('contact', ['url'], ['id' => $cid, 'network' => $networks]);
 361                                         if (DBA::isResult($contact) && !empty($profile = APContact::getByURL($contact['url'], false))) {
 362                                                 $data['to'][] = $profile['url'];
 363                                         }
 364                                 }
 365                         }
 366
 367                         foreach ($receiver_list as $receiver) {
 368                                 $contact = DBA::selectFirst('contact', ['url', 'hidden'], ['id' => $receiver, 'network' => $networks]);
 369                                 if (DBA::isResult($contact) && !empty($profile = APContact::getByURL($contact['url'], false))) {
 370                                         if ($contact['hidden'] || $always_bcc) {
 371                                                 $data['bcc'][] = $profile['url'];
 372                                         } else {
 373                                                 $data['cc'][] = $profile['url'];
 374                                         }
 375                                 }
 376                         }
 377                 }
 378
 379                 $parents = Item::select(['id', 'author-link', 'owner-link', 'gravity', 'uri'], ['parent' => $item['parent']]);
 380                 while ($parent = Item::fetch($parents)) {
 381                         // Don't include data from future posts
 382                         if ($parent['id'] >= $last_id) {
 383                                 continue;
 384                         }
 385
 386                         $profile = APContact::getByURL($parent['author-link'], false);
 387                         if (!empty($profile)) {
 388                                 if ($parent['uri'] == $item['thr-parent']) {
 389                                         $data['to'][] = $profile['url'];
 390                                 } else {
 391                                         $data['cc'][] = $profile['url'];
 392                                 }
 393                         }
 394
 395                         if ($item['gravity'] != GRAVITY_PARENT) {
 396                                 continue;
 397                         }
 398
 399                         $profile = APContact::getByURL($parent['owner-link'], false);
 400                         if (!empty($profile)) {
 401                                 $data['cc'][] = $profile['url'];
 402                         }
 403                 }
 404                 DBA::close($parents);
 405
 406                 $data['to'] = array_unique($data['to']);
 407                 $data['cc'] = array_unique($data['cc']);
 408                 $data['bcc'] = array_unique($data['bcc']);
 409
 410                 if (($key = array_search($item['author-link'], $data['to'])) !== false) {
 411                         unset($data['to'][$key]);
 412                 }
 413
 414                 if (($key = array_search($item['author-link'], $data['cc'])) !== false) {
 415                         unset($data['cc'][$key]);
 416                 }
 417
 418                 if (($key = array_search($item['author-link'], $data['bcc'])) !== false) {
 419                         unset($data['bcc'][$key]);
 420                 }
 421
 422                 foreach ($data['to'] as $to) {
 423                         if (($key = array_search($to, $data['cc'])) !== false) {
 424                                 unset($data['cc'][$key]);
 425                         }
 426
 427                         if (($key = array_search($to, $data['bcc'])) !== false) {
 428                                 unset($data['bcc'][$key]);
 429                         }
 430                 }
 431
 432                 foreach ($data['cc'] as $cc) {
 433                         if (($key = array_search($cc, $data['bcc'])) !== false) {
 434                                 unset($data['bcc'][$key]);
 435                         }
 436                 }
 437
 438                 $receivers = ['to' => array_values($data['to']), 'cc' => array_values($data['cc']), 'bcc' => array_values($data['bcc'])];
 439
 440                 if (!$blindcopy) {
 441                         unset($receivers['bcc']);
 442                 }
 443
 444                 return $receivers;
 445         }
 446
 447         /**
 448          * Fetches a list of inboxes of followers of a given user
 449          *
 450          * @param integer $uid      User ID
 451          * @param boolean $personal fetch personal inboxes
 452          *
 453          * @return array of follower inboxes
 454          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 455          * @throws \ImagickException
 456          */
 457         public static function fetchTargetInboxesforUser($uid, $personal = false)
 458         {
 459                 $inboxes = [];
 460
 461                 // Will be activated in a later step
 462                 // $networks = [Protocol::ACTIVITYPUB, Protocol::DFRN, Protocol::DIASPORA, Protocol::OSTATUS];
 463
 464                 // For now only send to these contacts:
 465                 $networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS];
 466
 467                 $condition = ['uid' => $uid, 'network' => $networks, 'archive' => false, 'pending' => false];
 468
 469                 if (!empty($uid)) {
 470                         $condition['rel'] = [Contact::FOLLOWER, Contact::FRIEND];
 471                 }
 472
 473                 $contacts = DBA::select('contact', ['url'], $condition);
 474                 while ($contact = DBA::fetch($contacts)) {
 475                         if (Network::isUrlBlocked($contact['url'])) {
 476                                 continue;
 477                         }
 478
 479                         $profile = APContact::getByURL($contact['url'], false);
 480                         if (!empty($profile)) {
 481                                 if (empty($profile['sharedinbox']) || $personal) {
 482                                         $target = $profile['inbox'];
 483                                 } else {
 484                                         $target = $profile['sharedinbox'];
 485                                 }
 486                                 $inboxes[$target] = $target;
 487                         }
 488                 }
 489                 DBA::close($contacts);
 490
 491                 return $inboxes;
 492         }
 493
 494         /**
 495          * Fetches an array of inboxes for the given item and user
 496          *
 497          * @param array   $item
 498          * @param integer $uid      User ID
 499          * @param boolean $personal fetch personal inboxes
 500          * @param integer $last_id Last item id for adding receivers
 501          *
 502          * @return array with inboxes
 503          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 504          * @throws \ImagickException
 505          */
 506         public static function fetchTargetInboxes($item, $uid, $personal = false, $last_id = 0)
 507         {
 508                 $permissions = self::createPermissionBlockForItem($item, true, $last_id);
 509                 if (empty($permissions)) {
 510                         return [];
 511                 }
 512
 513                 $inboxes = [];
 514
 515                 if ($item['gravity'] == GRAVITY_ACTIVITY) {
 516                         $item_profile = APContact::getByURL($item['author-link'], false);
 517                 } else {
 518                         $item_profile = APContact::getByURL($item['owner-link'], false);
 519                 }
 520
 521                 foreach (['to', 'cc', 'bto', 'bcc'] as $element) {
 522                         if (empty($permissions[$element])) {
 523                                 continue;
 524                         }
 525
 526                         $blindcopy = in_array($element, ['bto', 'bcc']);
 527
 528                         foreach ($permissions[$element] as $receiver) {
 529                                 if (Network::isUrlBlocked($receiver)) {
 530                                         continue;
 531                                 }
 532
 533                                 if ($receiver == $item_profile['followers']) {
 534                                         $inboxes = array_merge($inboxes, self::fetchTargetInboxesforUser($uid, $personal));
 535                                 } else {
 536                                         $profile = APContact::getByURL($receiver, false);
 537                                         if (!empty($profile)) {
 538                                                 if (empty($profile['sharedinbox']) || $personal || $blindcopy) {
 539                                                         $target = $profile['inbox'];
 540                                                 } else {
 541                                                         $target = $profile['sharedinbox'];
 542                                                 }
 543                                                 $inboxes[$target] = $target;
 544                                         }
 545                                 }
 546                         }
 547                 }
 548
 549                 return $inboxes;
 550         }
 551
 552         /**
 553          * Returns the activity type of a given item
 554          *
 555          * @param array $item
 556          *
 557          * @return string with activity type
 558          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 559          * @throws \ImagickException
 560          */
 561         private static function getTypeOfItem($item)
 562         {
 563                 $reshared = false;
 564
 565                 // Only check for a reshare, if it is a real reshare and no quoted reshare
 566                 if (strpos($item['body'], "[share") === 0) {
 567                         $announce = api_share_as_retweet($item);
 568                         $reshared = !empty($announce['plink']);
 569                 }
 570
 571                 if ($reshared) {
 572                         $type = 'Announce';
 573                 } elseif ($item['verb'] == ACTIVITY_POST) {
 574                         if ($item['created'] == $item['edited']) {
 575                                 $type = 'Create';
 576                         } else {
 577                                 $type = 'Update';
 578                         }
 579                 } elseif ($item['verb'] == ACTIVITY_LIKE) {
 580                         $type = 'Like';
 581                 } elseif ($item['verb'] == ACTIVITY_DISLIKE) {
 582                         $type = 'Dislike';
 583                 } elseif ($item['verb'] == ACTIVITY_ATTEND) {
 584                         $type = 'Accept';
 585                 } elseif ($item['verb'] == ACTIVITY_ATTENDNO) {
 586                         $type = 'Reject';
 587                 } elseif ($item['verb'] == ACTIVITY_ATTENDMAYBE) {
 588                         $type = 'TentativeAccept';
 589                 } else {
 590                         $type = '';
 591                 }
 592
 593                 return $type;
 594         }
 595
 596         /**
 597          * Creates the activity or fetches it from the cache
 598          *
 599          * @param integer $item_id
 600          * @param boolean $force Force new cache entry
 601          *
 602          * @return array with the activity
 603          * @throws \Exception
 604          */
 605         public static function createCachedActivityFromItem($item_id, $force = false)
 606         {
 607                 $cachekey = 'APDelivery:createActivity:' . $item_id;
 608
 609                 if (!$force) {
 610                         $data = Cache::get($cachekey);
 611                         if (!is_null($data)) {
 612                                 return $data;
 613                         }
 614                 }
 615
 616                 $data = ActivityPub\Transmitter::createActivityFromItem($item_id);
 617
 618                 Cache::set($cachekey, $data, Cache::QUARTER_HOUR);
 619                 return $data;
 620         }
 621
 622         /**
 623          * Creates an activity array for a given item id
 624          *
 625          * @param integer $item_id
 626          * @param boolean $object_mode Is the activity item is used inside another object?
 627          *
 628          * @return array of activity
 629          * @throws \Exception
 630          */
 631         public static function createActivityFromItem($item_id, $object_mode = false)
 632         {
 633                 $item = Item::selectFirst([], ['id' => $item_id, 'parent-network' => Protocol::NATIVE_SUPPORT]);
 634
 635                 if (!DBA::isResult($item)) {
 636                         return false;
 637                 }
 638
 639                 $condition = ['item-uri' => $item['uri'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB];
 640                 $conversation = DBA::selectFirst('conversation', ['source'], $condition);
 641                 if (DBA::isResult($conversation)) {
 642                         $data = json_decode($conversation['source']);
 643                         if (!empty($data)) {
 644                                 return $data;
 645                         }
 646                 }
 647
 648                 $type = self::getTypeOfItem($item);
 649
 650                 if (!$object_mode) {
 651                         $data = ['@context' => ActivityPub::CONTEXT];
 652
 653                         if ($item['deleted'] && ($item['gravity'] == GRAVITY_ACTIVITY)) {
 654                                 $type = 'Undo';
 655                         } elseif ($item['deleted']) {
 656                                 $type = 'Delete';
 657                         }
 658                 } else {
 659                         $data = [];
 660                 }
 661
 662                 $data['id'] = $item['uri'] . '#' . $type;
 663                 $data['type'] = $type;
 664                 $data['actor'] = $item['owner-link'];
 665
 666                 $data['published'] = DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM);
 667
 668                 $data['instrument'] = ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()];
 669
 670                 $data = array_merge($data, self::createPermissionBlockForItem($item, false));
 671
 672                 if (in_array($data['type'], ['Create', 'Update', 'Delete'])) {
 673                         $data['object'] = self::createNote($item);
 674                 } elseif ($data['type'] == 'Announce') {
 675                         $data['object'] = self::createAnnounce($item);
 676                 } elseif ($data['type'] == 'Undo') {
 677                         $data['object'] = self::createActivityFromItem($item_id, true);
 678                 } else {
 679                         $data['diaspora:guid'] = $item['guid'];
 680                         if (!empty($item['signed_text'])) {
 681                                 $data['diaspora:like'] = $item['signed_text'];
 682                         }
 683                         $data['object'] = $item['thr-parent'];
 684                 }
 685
 686                 if (!empty($item['contact-uid'])) {
 687                         $uid = $item['contact-uid'];
 688                 } else {
 689                         $uid = $item['uid'];
 690                 }
 691
 692                 $owner = User::getOwnerDataById($uid);
 693
 694                 if (!$object_mode && !empty($owner)) {
 695                         return LDSignature::sign($data, $owner);
 696                 } else {
 697                         return $data;
 698                 }
 699
 700                 /// @todo Create "conversation" entry
 701         }
 702
 703         /**
 704          * Creates an object array for a given item id
 705          *
 706          * @param integer $item_id
 707          *
 708          * @return array with the object data
 709          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 710          * @throws \ImagickException
 711          */
 712         public static function createObjectFromItemID($item_id)
 713         {
 714                 $item = Item::selectFirst([], ['id' => $item_id, 'parent-network' => Protocol::NATIVE_SUPPORT]);
 715
 716                 if (!DBA::isResult($item)) {
 717                         return false;
 718                 }
 719
 720                 $data = ['@context' => ActivityPub::CONTEXT];
 721                 $data = array_merge($data, self::createNote($item));
 722
 723                 return $data;
 724         }
 725
 726         /**
 727          * Creates a location entry for a given item array
 728          *
 729          * @param array $item
 730          *
 731          * @return array with location array
 732          */
 733         private static function createLocation($item)
 734         {
 735                 $location = ['type' => 'Place'];
 736
 737                 if (!empty($item['location'])) {
 738                         $location['name'] = $item['location'];
 739                 }
 740
 741                 $coord = [];
 742
 743                 if (empty($item['coord'])) {
 744                         $coord = Map::getCoordinates($item['location']);
 745                 } else {
 746                         $coords = explode(' ', $item['coord']);
 747                         if (count($coords) == 2) {
 748                                 $coord = ['lat' => $coords[0], 'lon' => $coords[1]];
 749                         }
 750                 }
 751
 752                 if (!empty($coord['lat']) && !empty($coord['lon'])) {
 753                         $location['latitude'] = $coord['lat'];
 754                         $location['longitude'] = $coord['lon'];
 755                 }
 756
 757                 return $location;
 758         }
 759
 760         /**
 761          * Returns a tag array for a given item array
 762          *
 763          * @param array $item
 764          *
 765          * @return array of tags
 766          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 767          */
 768         private static function createTagList($item)
 769         {
 770                 $tags = [];
 771
 772                 $terms = Term::tagArrayFromItemId($item['id']);
 773                 foreach ($terms as $term) {
 774                         if ($term['type'] == TERM_HASHTAG) {
 775                                 $url = System::baseUrl() . '/search?tag=' . urlencode($term['term']);
 776                                 $tags[] = ['type' => 'Hashtag', 'href' => $url, 'name' => '#' . $term['term']];
 777                         } elseif ($term['type'] == TERM_MENTION) {
 778                                 $contact = Contact::getDetailsByURL($term['url']);
 779                                 if (!empty($contact['addr'])) {
 780                                         $mention = '@' . $contact['addr'];
 781                                 } else {
 782                                         $mention = '@' . $term['url'];
 783                                 }
 784
 785                                 $tags[] = ['type' => 'Mention', 'href' => $term['url'], 'name' => $mention];
 786                         }
 787                 }
 788                 return $tags;
 789         }
 790
 791         /**
 792          * Adds attachment data to the JSON document
 793          *
 794          * @param array  $item Data of the item that is to be posted
 795          * @param string $type Object type
 796          *
 797          * @return array with attachment data
 798          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 799          */
 800         private static function createAttachmentList($item, $type)
 801         {
 802                 $attachments = [];
 803
 804                 $arr = explode('[/attach],', $item['attach']);
 805                 if (count($arr)) {
 806                         foreach ($arr as $r) {
 807                                 $matches = false;
 808                                 $cnt = preg_match('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\" title=\"(.*?)\"|', $r, $matches);
 809                                 if ($cnt) {
 810                                         $attributes = ['type' => 'Document',
 811                                                         'mediaType' => $matches[3],
 812                                                         'url' => $matches[1],
 813                                                         'name' => null];
 814
 815                                         if (trim($matches[4]) != '') {
 816                                                 $attributes['name'] = trim($matches[4]);
 817                                         }
 818
 819                                         $attachments[] = $attributes;
 820                                 }
 821                         }
 822                 }
 823
 824                 if ($type != 'Note') {
 825                         return $attachments;
 826                 }
 827
 828                 // Simplify image codes
 829                 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $item['body']);
 830
 831                 // Grab all pictures and create attachments out of them
 832                 if (preg_match_all("/\[img\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures)) {
 833                         foreach ($pictures[1] as $picture) {
 834                                 $imgdata = Image::getInfoFromURL($picture);
 835                                 if ($imgdata) {
 836                                         $attachments[] = ['type' => 'Document',
 837                                                 'mediaType' => $imgdata['mime'],
 838                                                 'url' => $picture,
 839                                                 'name' => null];
 840                                 }
 841                         }
 842                 }
 843
 844                 return $attachments;
 845         }
 846
 847         /**
 848          * @brief Callback function to replace a Friendica style mention in a mention that is used on AP
 849          *
 850          * @param array $match Matching values for the callback
 851          * @return string Replaced mention
 852          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 853          */
 854         private static function mentionCallback($match)
 855         {
 856                 if (empty($match[1])) {
 857                         return;
 858                 }
 859
 860                 $data = Contact::getDetailsByURL($match[1]);
 861                 if (empty($data) || empty($data['nick'])) {
 862                         return;
 863                 }
 864
 865                 return '@[url=' . $data['url'] . ']' . $data['nick'] . '[/url]';
 866         }
 867
 868         /**
 869          * Remove image elements and replaces them with links to the image
 870          *
 871          * @param string $body
 872          *
 873          * @return string with replaced elements
 874          */
 875         private static function removePictures($body)
 876         {
 877                 // Simplify image codes
 878                 $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body);
 879
 880                 $body = preg_replace("/\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]/Usi", '[url]$1[/url]', $body);
 881                 $body = preg_replace("/\[img\]([^\[\]]*)\[\/img\]/Usi", '[url]$1[/url]', $body);
 882
 883                 return $body;
 884         }
 885
 886         /**
 887          * Fetches the "context" value for a givem item array from the "conversation" table
 888          *
 889          * @param array $item
 890          *
 891          * @return string with context url
 892          * @throws \Exception
 893          */
 894         private static function fetchContextURLForItem($item)
 895         {
 896                 $conversation = DBA::selectFirst('conversation', ['conversation-href', 'conversation-uri'], ['item-uri' => $item['parent-uri']]);
 897                 if (DBA::isResult($conversation) && !empty($conversation['conversation-href'])) {
 898                         $context_uri = $conversation['conversation-href'];
 899                 } elseif (DBA::isResult($conversation) && !empty($conversation['conversation-uri'])) {
 900                         $context_uri = $conversation['conversation-uri'];
 901                 } else {
 902                         $context_uri = $item['parent-uri'] . '#context';
 903                 }
 904                 return $context_uri;
 905         }
 906
 907         /**
 908          * Returns if the post contains sensitive content ("nsfw")
 909          *
 910          * @param integer $item_id
 911          *
 912          * @return boolean
 913          * @throws \Exception
 914          */
 915         private static function isSensitive($item_id)
 916         {
 917                 $condition = ['otype' => TERM_OBJ_POST, 'oid' => $item_id, 'type' => TERM_HASHTAG, 'term' => 'nsfw'];
 918                 return DBA::exists('term', $condition);
 919         }
 920
 921         /**
 922          * Creates event data
 923          *
 924          * @param array $item
 925          *
 926          * @return array with the event data
 927          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 928          */
 929         public static function createEvent($item)
 930         {
 931                 $event = [];
 932                 $event['name'] = $item['event-summary'];
 933                 $event['content'] = BBCode::convert($item['event-desc'], false, 7);
 934                 $event['startTime'] = DateTimeFormat::utc($item['event-start'] . '+00:00', DateTimeFormat::ATOM);
 935
 936                 if (!$item['event-nofinish']) {
 937                         $event['endTime'] = DateTimeFormat::utc($item['event-finish'] . '+00:00', DateTimeFormat::ATOM);
 938                 }
 939
 940                 if (!empty($item['event-location'])) {
 941                         $item['location'] = $item['event-location'];
 942                         $event['location'] = self::createLocation($item);
 943                 }
 944
 945                 return $event;
 946         }
 947
 948         /**
 949          * Creates a note/article object array
 950          *
 951          * @param array $item
 952          *
 953          * @return array with the object data
 954          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 955          * @throws \ImagickException
 956          */
 957         public static function createNote($item)
 958         {
 959                 if ($item['event-type'] == 'event') {
 960                         $type = 'Event';
 961                 } elseif (!empty($item['title'])) {
 962                         $type = 'Article';
 963                 } else {
 964                         $type = 'Note';
 965                 }
 966
 967                 if ($item['deleted']) {
 968                         $type = 'Tombstone';
 969                 }
 970
 971                 $data = [];
 972                 $data['id'] = $item['uri'];
 973                 $data['type'] = $type;
 974
 975                 if ($item['deleted']) {
 976                         return $data;
 977                 }
 978
 979                 $data['summary'] = null; // Ignore by now
 980
 981                 if ($item['uri'] != $item['thr-parent']) {
 982                         $data['inReplyTo'] = $item['thr-parent'];
 983                 } else {
 984                         $data['inReplyTo'] = null;
 985                 }
 986
 987                 $data['diaspora:guid'] = $item['guid'];
 988                 $data['published'] = DateTimeFormat::utc($item['created'] . '+00:00', DateTimeFormat::ATOM);
 989
 990                 if ($item['created'] != $item['edited']) {
 991                         $data['updated'] = DateTimeFormat::utc($item['edited'] . '+00:00', DateTimeFormat::ATOM);
 992                 }
 993
 994                 $data['url'] = $item['plink'];
 995                 $data['attributedTo'] = $item['author-link'];
 996                 $data['sensitive'] = self::isSensitive($item['id']);
 997                 $data['context'] = self::fetchContextURLForItem($item);
 998
 999                 if (!empty($item['title'])) {
1000                         $data['name'] = BBCode::toPlaintext($item['title'], false);
1001                 }
1002
1003                 $body = $item['body'];
1004
1005                 if ($type == 'Note') {
1006                         $body = self::removePictures($body);
1007                 }
1008
1009                 if ($type == 'Event') {
1010                         $data = array_merge($data, self::createEvent($item));
1011                 } else {
1012                         $regexp = "/[@!]\[url\=([^\[\]]*)\].*?\[\/url\]/ism";
1013                         $body = preg_replace_callback($regexp, ['self', 'mentionCallback'], $body);
1014
1015                         $data['content'] = BBCode::convert($body, false, 7);
1016                 }
1017
1018                 $data['source'] = ['content' => $item['body'], 'mediaType' => "text/bbcode"];
1019
1020                 if (!empty($item['signed_text']) && ($item['uri'] != $item['thr-parent'])) {
1021                         $data['diaspora:comment'] = $item['signed_text'];
1022                 }
1023
1024                 $data['attachment'] = self::createAttachmentList($item, $type);
1025                 $data['tag'] = self::createTagList($item);
1026
1027                 if (empty($data['location']) && (!empty($item['coord']) || !empty($item['location']))) {
1028                         $data['location'] = self::createLocation($item);
1029                 }
1030
1031                 if (!empty($item['app'])) {
1032                         $data['generator'] = ['type' => 'Application', 'name' => $item['app']];
1033                 }
1034
1035                 $data = array_merge($data, self::createPermissionBlockForItem($item, false));
1036
1037                 return $data;
1038         }
1039
1040         /**
1041          * Creates an announce object entry
1042          *
1043          * @param array $item
1044          *
1045          * @return string with announced object url
1046          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1047          * @throws \ImagickException
1048          */
1049         public static function createAnnounce($item)
1050         {
1051                 $announce = api_share_as_retweet($item);
1052                 if (empty($announce['plink'])) {
1053                         return self::createNote($item);
1054                 }
1055
1056                 // Fetch the original id of the object
1057                 $activity = ActivityPub::fetchContent($announce['plink'], $item['uid']);
1058                 if (!empty($activity)) {
1059                         $ldactivity = JsonLD::compact($activity);
1060                         $id = JsonLD::fetchElement($ldactivity, '@id');
1061                         if (!empty($id)) {
1062                                 return $id;
1063                         }
1064                 }
1065
1066                 return self::createNote($item);
1067         }
1068
1069         /**
1070          * Creates an activity id for a given contact id
1071          *
1072          * @param integer $cid Contact ID of target
1073          *
1074          * @return bool|string activity id
1075          */
1076         public static function activityIDFromContact($cid)
1077         {
1078                 $contact = DBA::selectFirst('contact', ['uid', 'id', 'created'], ['id' => $cid]);
1079                 if (!DBA::isResult($contact)) {
1080                         return false;
1081                 }
1082
1083                 $hash = hash('ripemd128', $contact['uid'].'-'.$contact['id'].'-'.$contact['created']);
1084                 $uuid = substr($hash, 0, 8). '-' . substr($hash, 8, 4) . '-' . substr($hash, 12, 4) . '-' . substr($hash, 16, 4) . '-' . substr($hash, 20, 12);
1085                 return System::baseUrl() . '/activity/' . $uuid;
1086         }
1087
1088         /**
1089          * Transmits a contact suggestion to a given inbox
1090          *
1091          * @param integer $uid           User ID
1092          * @param string  $inbox         Target inbox
1093          * @param integer $suggestion_id Suggestion ID
1094          *
1095          * @return boolean was the transmission successful?
1096          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1097          */
1098         public static function sendContactSuggestion($uid, $inbox, $suggestion_id)
1099         {
1100                 $owner = User::getOwnerDataById($uid);
1101
1102                 $suggestion = DBA::selectFirst('fsuggest', ['url', 'note', 'created'], ['id' => $suggestion_id]);
1103
1104                 $data = ['@context' => ActivityPub::CONTEXT,
1105                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1106                         'type' => 'Announce',
1107                         'actor' => $owner['url'],
1108                         'object' => $suggestion['url'],
1109                         'content' => $suggestion['note'],
1110                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1111                         'to' => [ActivityPub::PUBLIC_COLLECTION],
1112                         'cc' => []];
1113
1114                 $signed = LDSignature::sign($data, $owner);
1115
1116                 Logger::log('Deliver profile deletion for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1117                 return HTTPSignature::transmit($signed, $inbox, $uid);
1118         }
1119
1120         /**
1121          * Transmits a profile relocation to a given inbox
1122          *
1123          * @param integer $uid   User ID
1124          * @param string  $inbox Target inbox
1125          *
1126          * @return boolean was the transmission successful?
1127          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1128          */
1129         public static function sendProfileRelocation($uid, $inbox)
1130         {
1131                 $owner = User::getOwnerDataById($uid);
1132
1133                 $data = ['@context' => ActivityPub::CONTEXT,
1134                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1135                         'type' => 'dfrn:relocate',
1136                         'actor' => $owner['url'],
1137                         'object' => $owner['url'],
1138                         'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1139                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1140                         'to' => [ActivityPub::PUBLIC_COLLECTION],
1141                         'cc' => []];
1142
1143                 $signed = LDSignature::sign($data, $owner);
1144
1145                 Logger::log('Deliver profile relocation for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1146                 return HTTPSignature::transmit($signed, $inbox, $uid);
1147         }
1148
1149         /**
1150          * Transmits a profile deletion to a given inbox
1151          *
1152          * @param integer $uid   User ID
1153          * @param string  $inbox Target inbox
1154          *
1155          * @return boolean was the transmission successful?
1156          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1157          */
1158         public static function sendProfileDeletion($uid, $inbox)
1159         {
1160                 $owner = User::getOwnerDataById($uid);
1161
1162                 $data = ['@context' => ActivityPub::CONTEXT,
1163                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1164                         'type' => 'Delete',
1165                         'actor' => $owner['url'],
1166                         'object' => $owner['url'],
1167                         'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1168                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1169                         'to' => [ActivityPub::PUBLIC_COLLECTION],
1170                         'cc' => []];
1171
1172                 $signed = LDSignature::sign($data, $owner);
1173
1174                 Logger::log('Deliver profile deletion for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1175                 return HTTPSignature::transmit($signed, $inbox, $uid);
1176         }
1177
1178         /**
1179          * Transmits a profile change to a given inbox
1180          *
1181          * @param integer $uid   User ID
1182          * @param string  $inbox Target inbox
1183          *
1184          * @return boolean was the transmission successful?
1185          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1186          * @throws \ImagickException
1187          */
1188         public static function sendProfileUpdate($uid, $inbox)
1189         {
1190                 $owner = User::getOwnerDataById($uid);
1191                 $profile = APContact::getByURL($owner['url']);
1192
1193                 $data = ['@context' => ActivityPub::CONTEXT,
1194                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1195                         'type' => 'Update',
1196                         'actor' => $owner['url'],
1197                         'object' => self::getProfile($uid),
1198                         'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
1199                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1200                         'to' => [$profile['followers']],
1201                         'cc' => []];
1202
1203                 $signed = LDSignature::sign($data, $owner);
1204
1205                 Logger::log('Deliver profile update for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
1206                 return HTTPSignature::transmit($signed, $inbox, $uid);
1207         }
1208
1209         /**
1210          * Transmits a given activity to a target
1211          *
1212          * @param string  $activity Type name
1213          * @param string  $target   Target profile
1214          * @param integer $uid      User ID
1215          * @return bool
1216          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1217          * @throws \ImagickException
1218          * @throws \Exception
1219          */
1220         public static function sendActivity($activity, $target, $uid, $id = '')
1221         {
1222                 $profile = APContact::getByURL($target);
1223
1224                 $owner = User::getOwnerDataById($uid);
1225
1226                 if (empty($id)) {
1227                         $id = System::baseUrl() . '/activity/' . System::createGUID();
1228                 }
1229
1230                 $data = ['@context' => ActivityPub::CONTEXT,
1231                         'id' => $id,
1232                         'type' => $activity,
1233                         'actor' => $owner['url'],
1234                         'object' => $profile['url'],
1235                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1236                         'to' => [$profile['url']]];
1237
1238                 Logger::log('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid, Logger::DEBUG);
1239
1240                 $signed = LDSignature::sign($data, $owner);
1241                 return HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1242         }
1243
1244         /**
1245          * Transmit a message that the contact request had been accepted
1246          *
1247          * @param string  $target Target profile
1248          * @param         $id
1249          * @param integer $uid    User ID
1250          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1251          * @throws \ImagickException
1252          */
1253         public static function sendContactAccept($target, $id, $uid)
1254         {
1255                 $profile = APContact::getByURL($target);
1256
1257                 $owner = User::getOwnerDataById($uid);
1258                 $data = ['@context' => ActivityPub::CONTEXT,
1259                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1260                         'type' => 'Accept',
1261                         'actor' => $owner['url'],
1262                         'object' => ['id' => $id, 'type' => 'Follow',
1263                                 'actor' => $profile['url'],
1264                                 'object' => $owner['url']],
1265                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1266                         'to' => [$profile['url']]];
1267
1268                 Logger::log('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
1269
1270                 $signed = LDSignature::sign($data, $owner);
1271                 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1272         }
1273
1274         /**
1275          * Reject a contact request or terminates the contact relation
1276          *
1277          * @param string  $target Target profile
1278          * @param         $id
1279          * @param integer $uid    User ID
1280          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1281          * @throws \ImagickException
1282          */
1283         public static function sendContactReject($target, $id, $uid)
1284         {
1285                 $profile = APContact::getByURL($target);
1286
1287                 $owner = User::getOwnerDataById($uid);
1288                 $data = ['@context' => ActivityPub::CONTEXT,
1289                         'id' => System::baseUrl() . '/activity/' . System::createGUID(),
1290                         'type' => 'Reject',
1291                         'actor' => $owner['url'],
1292                         'object' => ['id' => $id, 'type' => 'Follow',
1293                                 'actor' => $profile['url'],
1294                                 'object' => $owner['url']],
1295                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1296                         'to' => [$profile['url']]];
1297
1298                 Logger::log('Sending reject to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
1299
1300                 $signed = LDSignature::sign($data, $owner);
1301                 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1302         }
1303
1304         /**
1305          * Transmits a message that we don't want to follow this contact anymore
1306          *
1307          * @param string  $target Target profile
1308          * @param integer $uid    User ID
1309          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1310          * @throws \ImagickException
1311          * @throws \Exception
1312          */
1313         public static function sendContactUndo($target, $cid, $uid)
1314         {
1315                 $profile = APContact::getByURL($target);
1316
1317                 $object_id = self::activityIDFromContact($cid);
1318                 if (empty($object_id)) {
1319                         return;
1320                 }
1321
1322                 $id = System::baseUrl() . '/activity/' . System::createGUID();
1323
1324                 $owner = User::getOwnerDataById($uid);
1325                 $data = ['@context' => ActivityPub::CONTEXT,
1326                         'id' => $id,
1327                         'type' => 'Undo',
1328                         'actor' => $owner['url'],
1329                         'object' => ['id' => $object_id, 'type' => 'Follow',
1330                                 'actor' => $owner['url'],
1331                                 'object' => $profile['url']],
1332                         'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
1333                         'to' => [$profile['url']]];
1334
1335                 Logger::log('Sending undo to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
1336
1337                 $signed = LDSignature::sign($data, $owner);
1338                 HTTPSignature::transmit($signed, $profile['inbox'], $uid);
1339         }
1340 }