src/Core/ACL.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Core;
  23
  24 use Friendica\App\Page;
  25 use Friendica\Database\DBA;
  26 use Friendica\DI;
  27 use Friendica\Model\Contact;
  28 use Friendica\Model\Group;
  29 use Friendica\Model\User;
  30
  31 /**
  32  * Handle ACL management and display
  33  */
  34 class ACL
  35 {
  36         /**
  37          * Returns the default lock state for the given user id
  38          * @param int $uid
  39          * @return bool "true" if the default settings are non public
  40          */
  41         public static function getLockstateForUserId(int $uid)
  42         {
  43                 $user = User::getById($uid, ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid']);
  44                 return !empty($user['allow_cid']) || !empty($user['allow_gid']) || !empty($user['deny_cid']) || !empty($user['deny_gid']);
  45         }
  46
  47         /**
  48          * Returns a select input tag for private message recipient
  49          *
  50          * @param int  $selected Existing recipient contact ID
  51          * @return string
  52          * @throws \Exception
  53          */
  54         public static function getMessageContactSelectHTML(int $selected = null): string
  55         {
  56                 $o = '';
  57
  58                 $page = DI::page();
  59
  60                 $page->registerFooterScript(Theme::getPathForFile('asset/typeahead.js/dist/typeahead.bundle.js'));
  61                 $page->registerFooterScript(Theme::getPathForFile('js/friendica-tagsinput/friendica-tagsinput.js'));
  62                 $page->registerStylesheet(Theme::getPathForFile('js/friendica-tagsinput/friendica-tagsinput.css'));
  63                 $page->registerStylesheet(Theme::getPathForFile('js/friendica-tagsinput/friendica-tagsinput-typeahead.css'));
  64
  65                 $contacts = self::getValidMessageRecipientsForUser(DI::userSession()->getLocalUserId());
  66
  67                 $tpl = Renderer::getMarkupTemplate('acl/message_recipient.tpl');
  68                 $o = Renderer::replaceMacros($tpl, [
  69                         '$contacts'      => $contacts,
  70                         '$contacts_json' => json_encode($contacts),
  71                         '$selected'      => $selected,
  72                 ]);
  73
  74                 Hook::callAll(DI::args()->getModuleName() . '_post_recipient', $o);
  75
  76                 return $o;
  77         }
  78
  79         public static function getValidMessageRecipientsForUser(int $uid): array
  80         {
  81                 $condition = [
  82                         'uid'     => $uid,
  83                         'self'    => false,
  84                         'blocked' => false,
  85                         'pending' => false,
  86                         'archive' => false,
  87                         'deleted' => false,
  88                         'rel'     => [Contact::FOLLOWER, Contact::SHARING, Contact::FRIEND],
  89                         'network' => Protocol::SUPPORT_PRIVATE,
  90                 ];
  91
  92                 return Contact::selectToArray(
  93                         ['id', 'name', 'addr', 'micro', 'url', 'nick'],
  94                         DBA::mergeConditions($condition, ["`notify` != ''"])
  95                 );
  96         }
  97
  98         /**
  99          * Returns a minimal ACL block for self-only permissions
 100          *
 101          * @param int    $localUserId
 102          * @param string $explanation
 103          * @return string
 104          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 105          */
 106         public static function getSelfOnlyHTML(int $localUserId, string $explanation)
 107         {
 108                 $selfPublicContactId = Contact::getPublicIdByUserId($localUserId);
 109
 110                 $tpl = Renderer::getMarkupTemplate('acl/self_only.tpl');
 111                 $o = Renderer::replaceMacros($tpl, [
 112                         '$selfPublicContactId' => $selfPublicContactId,
 113                         '$explanation' => $explanation,
 114                 ]);
 115
 116                 return $o;
 117         }
 118
 119         /**
 120          * Return the default permission of the provided user array
 121          *
 122          * @param array $user
 123          * @return array Hash of contact id lists
 124          * @throws \Exception
 125          */
 126         public static function getDefaultUserPermissions(array $user = null)
 127         {
 128                 $aclFormatter = DI::aclFormatter();
 129
 130                 return [
 131                         'allow_cid' => Contact::pruneUnavailable($aclFormatter->expand($user['allow_cid'] ?? '')),
 132                         'allow_gid' => $aclFormatter->expand($user['allow_gid'] ?? ''),
 133                         'deny_cid'  => $aclFormatter->expand($user['deny_cid']  ?? ''),
 134                         'deny_gid'  => $aclFormatter->expand($user['deny_gid']  ?? ''),
 135                 ];
 136         }
 137
 138         /**
 139          * Returns the ACL list of contacts for a given user id
 140          *
 141          * @param int   $user_id
 142          * @param array $condition Additional contact lookup table conditions
 143          * @return array
 144          * @throws \Exception
 145          */
 146         public static function getContactListByUserId(int $user_id, array $condition = [])
 147         {
 148                 $fields = ['id', 'name', 'addr', 'micro'];
 149                 $params = ['order' => ['name']];
 150                 $acl_contacts = Contact::selectToArray(
 151                         $fields,
 152                         array_merge([
 153                                 'uid' => $user_id,
 154                                 'self' => false,
 155                                 'blocked' => false,
 156                                 'archive' => false,
 157                                 'deleted' => false,
 158                                 'pending' => false,
 159                                 'network' => Protocol::FEDERATED,
 160                                 'rel' => [Contact::FOLLOWER, Contact::FRIEND]
 161                         ], $condition),
 162                         $params
 163                 );
 164
 165                 $acl_yourself = Contact::selectFirst($fields, ['uid' => $user_id, 'self' => true]);
 166                 $acl_yourself['name'] = DI::l10n()->t('Yourself');
 167
 168                 $acl_contacts[] = $acl_yourself;
 169
 170                 $acl_forums = Contact::selectToArray($fields,
 171                         ['uid' => $user_id, 'self' => false, 'blocked' => false, 'archive' => false, 'deleted' => false,
 172                         'network' => Protocol::FEDERATED, 'pending' => false, 'contact-type' => Contact::TYPE_COMMUNITY], $params
 173                 );
 174
 175                 $acl_contacts = array_merge($acl_forums, $acl_contacts);
 176
 177                 array_walk($acl_contacts, function (&$value) {
 178                         $value['type'] = 'contact';
 179                 });
 180
 181                 return $acl_contacts;
 182         }
 183
 184         /**
 185          * Returns the ACL list of groups (including meta-groups) for a given user id
 186          *
 187          * @param int $user_id
 188          * @return array
 189          */
 190         public static function getGroupListByUserId(int $user_id)
 191         {
 192                 $acl_groups = [
 193                         [
 194                                 'id' => Group::FOLLOWERS,
 195                                 'name' => DI::l10n()->t('Followers'),
 196                                 'addr' => '',
 197                                 'micro' => 'images/twopeople.png',
 198                                 'type' => 'group',
 199                         ],
 200                         [
 201                                 'id' => Group::MUTUALS,
 202                                 'name' => DI::l10n()->t('Mutuals'),
 203                                 'addr' => '',
 204                                 'micro' => 'images/twopeople.png',
 205                                 'type' => 'group',
 206                         ]
 207                 ];
 208                 foreach (Group::getByUserId($user_id) as $group) {
 209                         $acl_groups[] = [
 210                                 'id' => $group['id'],
 211                                 'name' => $group['name'],
 212                                 'addr' => '',
 213                                 'micro' => 'images/twopeople.png',
 214                                 'type' => 'group',
 215                         ];
 216                 }
 217
 218                 return $acl_groups;
 219         }
 220
 221         /**
 222          * Return the full jot ACL selector HTML
 223          *
 224          * @param Page   $page
 225          * @param int    $uid                   User ID
 226          * @param bool   $for_federation
 227          * @param array  $default_permissions   Static defaults permission array:
 228          *                                      [
 229          *                                      'allow_cid' => [],
 230          *                                      'allow_gid' => [],
 231          *                                      'deny_cid' => [],
 232          *                                      'deny_gid' => []
 233          *                                      ]
 234          * @param array  $condition
 235          * @param string $form_prefix
 236          * @return string
 237          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 238          */
 239         public static function getFullSelectorHTML(
 240                 Page $page,
 241                 int $uid = null,
 242                 bool $for_federation = false,
 243                 array $default_permissions = [],
 244                 array $condition = [],
 245                 $form_prefix = ''
 246         ) {
 247                 if (empty($uid)) {
 248                         return '';
 249                 }
 250
 251                 static $input_group_id = 0;
 252
 253                 $user = User::getById($uid);
 254
 255                 $input_group_id++;
 256
 257                 $page->registerFooterScript(Theme::getPathForFile('asset/typeahead.js/dist/typeahead.bundle.js'));
 258                 $page->registerFooterScript(Theme::getPathForFile('js/friendica-tagsinput/friendica-tagsinput.js'));
 259                 $page->registerStylesheet(Theme::getPathForFile('js/friendica-tagsinput/friendica-tagsinput.css'));
 260                 $page->registerStylesheet(Theme::getPathForFile('js/friendica-tagsinput/friendica-tagsinput-typeahead.css'));
 261
 262                 // Defaults user permissions
 263                 if (empty($default_permissions)) {
 264                         $default_permissions = self::getDefaultUserPermissions($user);
 265                 }
 266
 267                 $default_permissions = [
 268                         'allow_cid' => $default_permissions['allow_cid'] ?? [],
 269                         'allow_gid' => $default_permissions['allow_gid'] ?? [],
 270                         'deny_cid'  => $default_permissions['deny_cid']  ?? [],
 271                         'deny_gid'  => $default_permissions['deny_gid']  ?? [],
 272                 ];
 273
 274                 if (count($default_permissions['allow_cid'])
 275                         + count($default_permissions['allow_gid'])
 276                         + count($default_permissions['deny_cid'])
 277                         + count($default_permissions['deny_gid'])) {
 278                         $visibility = 'custom';
 279                 } else {
 280                         $visibility = 'public';
 281                         // Default permission display for custom panel
 282                         $default_permissions['allow_gid'] = [Group::FOLLOWERS];
 283                 }
 284
 285                 $jotnets_fields = [];
 286                 if ($for_federation) {
 287                         if (function_exists('imap_open') && !DI::config()->get('system', 'imap_disabled')) {
 288                                 $mailacct = DBA::selectFirst('mailacct', ['pubmail'], ['`uid` = ? AND `server` != ""', $user['uid']]);
 289                                 if (DBA::isResult($mailacct)) {
 290                                         $jotnets_fields[] = [
 291                                                 'type' => 'checkbox',
 292                                                 'field' => [
 293                                                         'pubmail_enable',
 294                                                         DI::l10n()->t('Post to Email'),
 295                                                         !empty($mailacct['pubmail'])
 296                                                 ]
 297                                         ];
 298
 299                                 }
 300                         }
 301                         Hook::callAll('jot_networks', $jotnets_fields);
 302                 }
 303
 304                 $acl_contacts = self::getContactListByUserId($user['uid'], $condition);
 305
 306                 $acl_groups = self::getGroupListByUserId($user['uid']);
 307
 308                 $acl_list = array_merge($acl_groups, $acl_contacts);
 309
 310                 $input_names = [
 311                         'visibility'    => $form_prefix ? $form_prefix . '[visibility]'    : 'visibility',
 312                         'group_allow'   => $form_prefix ? $form_prefix . '[group_allow]'   : 'group_allow',
 313                         'contact_allow' => $form_prefix ? $form_prefix . '[contact_allow]' : 'contact_allow',
 314                         'group_deny'    => $form_prefix ? $form_prefix . '[group_deny]'    : 'group_deny',
 315                         'contact_deny'  => $form_prefix ? $form_prefix . '[contact_deny]'  : 'contact_deny',
 316                         'emailcc'       => $form_prefix ? $form_prefix . '[emailcc]'       : 'emailcc',
 317                 ];
 318
 319                 $tpl = Renderer::getMarkupTemplate('acl/full_selector.tpl');
 320                 $o = Renderer::replaceMacros($tpl, [
 321                         '$public_title'   => DI::l10n()->t('Public'),
 322                         '$public_desc'    => DI::l10n()->t('This content will be shown to all your followers and can be seen in the community pages and by anyone with its link.'),
 323                         '$custom_title'   => DI::l10n()->t('Limited/Private'),
 324                         '$custom_desc'    => DI::l10n()->t('This content will be shown only to the people in the first box, to the exception of the people mentioned in the second box. It won\'t appear anywhere public.') . DI::l10n()->t('Start typing the name of a contact or a group to show a filtered list. You can also mention the special groups "Followers" and "Mutuals".'),
 325                         '$allow_label'    => DI::l10n()->t('Show to:'),
 326                         '$deny_label'     => DI::l10n()->t('Except to:'),
 327                         '$emailcc'        => DI::l10n()->t('CC: email addresses'),
 328                         '$emtitle'        => DI::l10n()->t('Example: bob@example.com, mary@example.com'),
 329                         '$jotnets_summary' => DI::l10n()->t('Connectors'),
 330                         '$visibility'     => $visibility,
 331                         '$acl_contacts'   => json_encode($acl_contacts),
 332                         '$acl_groups'     => json_encode($acl_groups),
 333                         '$acl_list'       => json_encode($acl_list),
 334                         '$contact_allow'  => implode(',', $default_permissions['allow_cid']),
 335                         '$group_allow'    => implode(',', $default_permissions['allow_gid']),
 336                         '$contact_deny'   => implode(',', $default_permissions['deny_cid']),
 337                         '$group_deny'     => implode(',', $default_permissions['deny_gid']),
 338                         '$for_federation' => $for_federation,
 339                         '$jotnets_fields' => $jotnets_fields,
 340                         '$input_names'    => $input_names,
 341                         '$input_group_id' => $input_group_id,
 342                 ]);
 343
 344                 return $o;
 345         }
 346
 347         /**
 348          * Checks the validity of the given ACL string
 349          *
 350          * @param string $acl_string
 351          * @param int    $uid
 352          * @return bool
 353          * @throws Exception
 354          */
 355         public static function isValidContact($acl_string, $uid)
 356         {
 357                 if (empty($acl_string)) {
 358                         return true;
 359                 }
 360
 361                 // split <x><y><z> into array of cids
 362                 preg_match_all('/<[A-Za-z0-9]+>/', $acl_string, $array);
 363
 364                 // check for each cid if the contact is valid for the given user
 365                 $cid_array = $array[0];
 366                 foreach ($cid_array as $cid) {
 367                         $cid = str_replace(['<', '>'], ['', ''], $cid);
 368                         if (!DBA::exists('contact', ['id' => $cid, 'uid' => $uid])) {
 369                                 return false;
 370                         }
 371                 }
 372
 373                 return true;
 374         }
 375
 376         /**
 377          * Checks the validity of the given ACL string
 378          *
 379          * @param string $acl_string
 380          * @param int    $uid
 381          * @return bool
 382          * @throws Exception
 383          */
 384         public static function isValidGroup($acl_string, $uid)
 385         {
 386                 if (empty($acl_string)) {
 387                         return true;
 388                 }
 389
 390                 // split <x><y><z> into array of cids
 391                 preg_match_all('/<[A-Za-z0-9]+>/', $acl_string, $array);
 392
 393                 // check for each cid if the contact is valid for the given user
 394                 $gid_array = $array[0];
 395                 foreach ($gid_array as $gid) {
 396                         $gid = str_replace(['<', '>'], ['', ''], $gid);
 397                         if (!DBA::exists('group', ['id' => $gid, 'uid' => $uid, 'deleted' => false])) {
 398                                 return false;
 399                         }
 400                 }
 401
 402                 return true;
 403         }
 404 }