mod/display.php

   1 <?php
   2 /**
   3  * @file mod/display.php
   4  */
   5
   6 use Friendica\App;
   7 use Friendica\Content\Pager;
   8 use Friendica\Content\Text\BBCode;
   9 use Friendica\Content\Text\HTML;
  10 use Friendica\Core\ACL;
  11 use Friendica\Core\Logger;
  12 use Friendica\Core\Protocol;
  13 use Friendica\Core\Renderer;
  14 use Friendica\Core\Session;
  15 use Friendica\Database\DBA;
  16 use Friendica\DI;
  17 use Friendica\Model\Contact;
  18 use Friendica\Model\Item;
  19 use Friendica\Model\Profile;
  20 use Friendica\Module\Objects;
  21 use Friendica\Network\HTTPException;
  22 use Friendica\Protocol\ActivityPub;
  23 use Friendica\Protocol\DFRN;
  24 use Friendica\Util\Strings;
  25
  26 function display_init(App $a)
  27 {
  28         if (ActivityPub::isRequest()) {
  29                 Objects::rawContent();
  30         }
  31
  32         if (DI::config()->get('system', 'block_public') && !Session::isAuthenticated()) {
  33                 return;
  34         }
  35
  36         $nick = (($a->argc > 1) ? $a->argv[1] : '');
  37
  38         $item = null;
  39         $item_user = local_user();
  40
  41         $fields = ['id', 'parent', 'author-id', 'body', 'uid', 'guid'];
  42
  43         // If there is only one parameter, then check if this parameter could be a guid
  44         if ($a->argc == 2) {
  45                 $nick = "";
  46
  47                 // Does the local user have this item?
  48                 if (local_user()) {
  49                         $item = Item::selectFirstForUser(local_user(), $fields, ['guid' => $a->argv[1], 'uid' => local_user()]);
  50                         if (DBA::isResult($item)) {
  51                                 $nick = $a->user["nickname"];
  52                         }
  53                 }
  54
  55                 // Is this item private but could be visible to the remove visitor?
  56                 if (!DBA::isResult($item) && remote_user()) {
  57                         $item = Item::selectFirst($fields, ['guid' => $a->argv[1], 'private' => 1, 'origin' => true]);
  58                         if (DBA::isResult($item)) {
  59                                 if (!Contact::isFollower(remote_user(), $item['uid'])) {
  60                                         $item = null;
  61                                 } else {
  62                                         $item_user = $item['uid'];
  63                                 }
  64                         }
  65                 }
  66
  67                 // Is it an item with uid=0?
  68                 if (!DBA::isResult($item)) {
  69                         $item = Item::selectFirstForUser(local_user(), $fields, ['guid' => $a->argv[1], 'private' => [0, 2], 'uid' => 0]);
  70                 }
  71         } elseif ($a->argc >= 3 && $nick == 'feed-item') {
  72                 $item_id = $a->argv[2];
  73                 if (substr($item_id, -5) == '.atom') {
  74                         $item_id = substr($item_id, 0, -5);
  75                 }
  76                 $item = Item::selectFirstForUser(local_user(), $fields, ['id' => $item_id, 'private' => [0, 2], 'uid' => 0]);
  77         }
  78
  79         if (!DBA::isResult($item)) {
  80                 return;
  81         }
  82
  83         if ($a->argc >= 3 && $nick == 'feed-item') {
  84                 displayShowFeed($item['id'], $a->argc > 3 && $a->argv[3] == 'conversation.atom');
  85         }
  86
  87         if (!empty($_SERVER['HTTP_ACCEPT']) && strstr($_SERVER['HTTP_ACCEPT'], 'application/atom+xml')) {
  88                 Logger::log('Directly serving XML for id '.$item["id"], Logger::DEBUG);
  89                 displayShowFeed($item["id"], false);
  90         }
  91
  92         if ($item["id"] != $item["parent"]) {
  93                 $parent = Item::selectFirstForUser($item_user, $fields, ['id' => $item["parent"]]);
  94                 $item = $parent ?: $item;
  95         }
  96
  97         $profiledata = display_fetchauthor($a, $item);
  98
  99         if (strstr(Strings::normaliseLink($profiledata["url"]), Strings::normaliseLink(DI::baseUrl()))) {
 100                 $nickname = str_replace(Strings::normaliseLink(DI::baseUrl())."/profile/", "", Strings::normaliseLink($profiledata["url"]));
 101
 102                 if ($nickname != $a->user["nickname"]) {
 103                         $profile = DBA::fetchFirst("SELECT `profile`.* , `contact`.`avatar-date` AS picdate, `user`.* FROM `profile`
 104                                 INNER JOIN `contact` on `contact`.`uid` = `profile`.`uid` INNER JOIN `user` ON `profile`.`uid` = `user`.`uid`
 105                                 WHERE `user`.`nickname` = ? AND `contact`.`self` LIMIT 1",
 106                                 $nickname
 107                         );
 108                         if (DBA::isResult($profile)) {
 109                                 $profiledata = $profile;
 110                         }
 111                         $profiledata["network"] = Protocol::DFRN;
 112                 } else {
 113                         $profiledata = [];
 114                 }
 115         }
 116
 117         Profile::load($a, $nick, 0, $profiledata);
 118 }
 119
 120 function display_fetchauthor($a, $item)
 121 {
 122         $author = DBA::selectFirst('contact', ['name', 'nick', 'photo', 'network', 'url'], ['id' => $item['author-id']]);
 123
 124         $profiledata = [];
 125         $profiledata['uid'] = -1;
 126         $profiledata['nickname'] = $author['nick'];
 127         $profiledata['name'] = $author['name'];
 128         $profiledata['picdate'] = '';
 129         $profiledata['photo'] = $author['photo'];
 130         $profiledata['url'] = $author['url'];
 131         $profiledata['network'] = $author['network'];
 132
 133         // Check for a repeated message
 134         $shared = Item::getShareArray($item);
 135         if (!empty($shared) && empty($shared['comment'])) {
 136                 if (!empty($shared['author'])) {
 137                         $profiledata['name'] = $shared['author'];
 138                 }
 139
 140                 if (!empty($shared['profile'])) {
 141                         $profiledata['url'] = $shared['profile'];
 142                 }
 143
 144                 if (!empty($shared['avatar'])) {
 145                         $profiledata['photo'] = $shared['avatar'];
 146                 }
 147
 148                 $profiledata["nickname"] = $profiledata["name"];
 149                 $profiledata["network"] = Protocol::matchByProfileUrl($profiledata["url"]);
 150
 151                 $profiledata["address"] = "";
 152                 $profiledata["about"] = "";
 153         }
 154
 155         $profiledata = Contact::getDetailsByURL($profiledata["url"], local_user(), $profiledata);
 156
 157         if (!empty($profiledata["photo"])) {
 158                 $profiledata["photo"] = DI::baseUrl()->remove($profiledata["photo"]);
 159         }
 160
 161         return $profiledata;
 162 }
 163
 164 function display_content(App $a, $update = false, $update_uid = 0)
 165 {
 166         if (DI::config()->get('system','block_public') && !Session::isAuthenticated()) {
 167                 throw new HTTPException\ForbiddenException(DI::l10n()->t('Public access denied.'));
 168         }
 169
 170         $o = '';
 171
 172         $item = null;
 173
 174         if ($update) {
 175                 $item_id = $_REQUEST['item_id'];
 176                 $item = Item::selectFirst(['uid', 'parent', 'parent-uri'], ['id' => $item_id]);
 177                 if ($item['uid'] != 0) {
 178                         $a->profile = ['uid' => intval($item['uid'])];
 179                 } else {
 180                         $a->profile = ['uid' => intval($update_uid)];
 181                 }
 182                 $item_parent = $item['parent'];
 183                 $item_parent_uri = $item['parent-uri'];
 184         } else {
 185                 $item_id = (($a->argc > 2) ? $a->argv[2] : 0);
 186                 $item_parent = $item_id;
 187
 188                 if ($a->argc == 2) {
 189                         $item_parent = 0;
 190                         $fields = ['id', 'parent', 'parent-uri', 'uid'];
 191
 192                         if (local_user()) {
 193                                 $condition = ['guid' => $a->argv[1], 'uid' => local_user()];
 194                                 $item = Item::selectFirstForUser(local_user(), $fields, $condition);
 195                                 if (DBA::isResult($item)) {
 196                                         $item_id = $item["id"];
 197                                         $item_parent = $item["parent"];
 198                                         $item_parent_uri = $item['parent-uri'];
 199                                 }
 200                         }
 201
 202                         if (($item_parent == 0) && remote_user()) {
 203                                 $item = Item::selectFirst($fields, ['guid' => $a->argv[1], 'private' => 1, 'origin' => true]);
 204                                 if (DBA::isResult($item) && Contact::isFollower(remote_user(), $item['uid'])) {
 205                                         $item_id = $item["id"];
 206                                         $item_parent = $item["parent"];
 207                                         $item_parent_uri = $item['parent-uri'];
 208                                 }
 209                         }
 210
 211                         if ($item_parent == 0) {
 212                                 $condition = ['private' => [0, 2], 'guid' => $a->argv[1], 'uid' => 0];
 213                                 $item = Item::selectFirstForUser(local_user(), $fields, $condition);
 214                                 if (DBA::isResult($item)) {
 215                                         $item_id = $item["id"];
 216                                         $item_parent = $item["parent"];
 217                                         $item_parent_uri = $item['parent-uri'];
 218                                 }
 219                         }
 220                 }
 221         }
 222
 223         if (empty($item)) {
 224                 throw new HTTPException\NotFoundException(DI::l10n()->t('The requested item doesn\'t exist or has been deleted.'));
 225         }
 226
 227         // We are displaying an "alternate" link if that post was public. See issue 2864
 228         $is_public = Item::exists(['id' => $item_id, 'private' => [0, 2]]);
 229         if ($is_public) {
 230                 // For the atom feed the nickname doesn't matter at all, we only need the item id.
 231                 $alternate = DI::baseUrl().'/display/feed-item/'.$item_id.'.atom';
 232                 $conversation = DI::baseUrl().'/display/feed-item/'.$item_parent.'/conversation.atom';
 233         } else {
 234                 $alternate = '';
 235                 $conversation = '';
 236         }
 237
 238         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('display-head.tpl'),
 239                                 ['$alternate' => $alternate,
 240                                         '$conversation' => $conversation]);
 241
 242         $is_remote_contact = false;
 243         $item_uid = local_user();
 244
 245         $parent = null;
 246         if (!empty($item_parent_uri)) {
 247                 $parent = Item::selectFirst(['uid'], ['uri' => $item_parent_uri, 'wall' => true]);
 248         }
 249
 250         if (DBA::isResult($parent)) {
 251                 $a->profile['uid'] = ($a->profile['uid'] ?? 0) ?: $parent['uid'];
 252                 $is_remote_contact = Session::getRemoteContactID($a->profile['uid']);
 253                 if ($is_remote_contact) {
 254                         $item_uid = $parent['uid'];
 255                 }
 256         } else {
 257                 $a->profile = ['uid' => intval($item['uid'])];
 258         }
 259
 260         $page_contact = DBA::selectFirst('contact', [], ['self' => true, 'uid' => $a->profile['uid']]);
 261         if (DBA::isResult($page_contact)) {
 262                 $a->page_contact = $page_contact;
 263         }
 264
 265         $is_owner = (local_user() && (in_array($a->profile['uid'], [local_user(), 0])) ? true : false);
 266
 267         if (!empty($a->profile['hidewall']) && !$is_owner && !$is_remote_contact) {
 268                 throw new HTTPException\ForbiddenException(DI::l10n()->t('Access to this profile has been restricted.'));
 269         }
 270
 271         // We need the editor here to be able to reshare an item.
 272         if ($is_owner) {
 273                 $x = [
 274                         'is_owner' => true,
 275                         'allow_location' => $a->user['allow_location'],
 276                         'default_location' => $a->user['default-location'],
 277                         'nickname' => $a->user['nickname'],
 278                         'lockstate' => (is_array($a->user) && (strlen($a->user['allow_cid']) || strlen($a->user['allow_gid']) || strlen($a->user['deny_cid']) || strlen($a->user['deny_gid'])) ? 'lock' : 'unlock'),
 279                         'acl' => ACL::getFullSelectorHTML(DI::page(), $a->user, true),
 280                         'bang' => '',
 281                         'visitor' => 'block',
 282                         'profile_uid' => local_user(),
 283                 ];
 284                 $o .= status_editor($a, $x, 0, true);
 285         }
 286         $sql_extra = Item::getPermissionsSQLByUserId($a->profile['uid']);
 287
 288         if (local_user() && (local_user() == $a->profile['uid'])) {
 289                 $condition = ['parent-uri' => $item_parent_uri, 'uid' => local_user(), 'unseen' => true];
 290                 $unseen = Item::exists($condition);
 291         } else {
 292                 $unseen = false;
 293         }
 294
 295         if ($update && !$unseen) {
 296                 return '';
 297         }
 298
 299         $condition = ["`id` = ? AND `item`.`uid` IN (0, ?) " . $sql_extra, $item_id, $item_uid];
 300         $fields = ['parent-uri', 'body', 'title', 'author-name', 'author-avatar', 'plink', 'author-id', 'owner-id', 'contact-id'];
 301         $item = Item::selectFirstForUser($a->profile['uid'], $fields, $condition);
 302
 303         if (!DBA::isResult($item)) {
 304                 throw new HTTPException\NotFoundException(DI::l10n()->t('The requested item doesn\'t exist or has been deleted.'));
 305         }
 306
 307         $item['uri'] = $item['parent-uri'];
 308
 309         if ($unseen) {
 310                 $condition = ['parent-uri' => $item_parent_uri, 'uid' => local_user(), 'unseen' => true];
 311                 Item::update(['unseen' => false], $condition);
 312         }
 313
 314         if (!$update) {
 315                 $o .= "<script> var netargs = '?item_id=" . $item_id . "'; </script>";
 316         }
 317
 318         $o .= conversation($a, [$item], new Pager(DI::args()->getQueryString()), 'display', $update_uid, false, 'commented', $item_uid);
 319
 320         // Preparing the meta header
 321         $description = trim(HTML::toPlaintext(BBCode::convert($item["body"], false), 0, true));
 322         $title = trim(HTML::toPlaintext(BBCode::convert($item["title"], false), 0, true));
 323         $author_name = $item["author-name"];
 324
 325         $image = DI::baseUrl()->remove($item["author-avatar"]);
 326
 327         if ($title == "") {
 328                 $title = $author_name;
 329         }
 330
 331         // Limit the description to 160 characters
 332         if (strlen($description) > 160) {
 333                 $description = substr($description, 0, 157) . '...';
 334         }
 335
 336         $description = htmlspecialchars($description, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
 337         $title = htmlspecialchars($title, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
 338         $author_name = htmlspecialchars($author_name, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
 339
 340         $page = DI::page();
 341
 342         if (DBA::exists('contact', ['unsearchable' => true, 'id' => [$item['contact-id'], $item['author-id'], $item['owner-id']]])) {
 343                 $page['htmlhead'] .= '<meta content="noindex, noarchive" name="robots" />' . "\n";
 344         }
 345
 346         DI::page()['htmlhead'] .= '<meta name="author" content="'.$author_name.'" />'."\n";
 347         $page['htmlhead'] .= '<meta name="title" content="'.$title.'" />'."\n";
 348         $page['htmlhead'] .= '<meta name="fulltitle" content="'.$title.'" />'."\n";
 349         $page['htmlhead'] .= '<meta name="description" content="'.$description.'" />'."\n";
 350
 351         // Schema.org microdata
 352         $page['htmlhead'] .= '<meta itemprop="name" content="'.$title.'" />'."\n";
 353         $page['htmlhead'] .= '<meta itemprop="description" content="'.$description.'" />'."\n";
 354         $page['htmlhead'] .= '<meta itemprop="image" content="'.$image.'" />'."\n";
 355         $page['htmlhead'] .= '<meta itemprop="author" content="'.$author_name.'" />'."\n";
 356
 357         // Twitter cards
 358         $page['htmlhead'] .= '<meta name="twitter:card" content="summary" />'."\n";
 359         $page['htmlhead'] .= '<meta name="twitter:title" content="'.$title.'" />'."\n";
 360         $page['htmlhead'] .= '<meta name="twitter:description" content="'.$description.'" />'."\n";
 361         $page['htmlhead'] .= '<meta name="twitter:image" content="'.DI::baseUrl().'/'.$image.'" />'."\n";
 362         $page['htmlhead'] .= '<meta name="twitter:url" content="'.$item["plink"].'" />'."\n";
 363
 364         // Dublin Core
 365         $page['htmlhead'] .= '<meta name="DC.title" content="'.$title.'" />'."\n";
 366         $page['htmlhead'] .= '<meta name="DC.description" content="'.$description.'" />'."\n";
 367
 368         // Open Graph
 369         $page['htmlhead'] .= '<meta property="og:type" content="website" />'."\n";
 370         $page['htmlhead'] .= '<meta property="og:title" content="'.$title.'" />'."\n";
 371         $page['htmlhead'] .= '<meta property="og:image" content="'.DI::baseUrl().'/'.$image.'" />'."\n";
 372         $page['htmlhead'] .= '<meta property="og:url" content="'.$item["plink"].'" />'."\n";
 373         $page['htmlhead'] .= '<meta property="og:description" content="'.$description.'" />'."\n";
 374         $page['htmlhead'] .= '<meta name="og:article:author" content="'.$author_name.'" />'."\n";
 375         // article:tag
 376
 377         return $o;
 378 }
 379
 380 function displayShowFeed($item_id, $conversation)
 381 {
 382         $xml = DFRN::itemFeed($item_id, $conversation);
 383         if ($xml == '') {
 384                 throw new HTTPException\InternalServerErrorException(DI::l10n()->t('The feed for this item is unavailable.'));
 385         }
 386         header("Content-type: application/atom+xml");
 387         echo $xml;
 388         exit();
 389 }