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