remote_permissions/remote_permissions.php

   1 <?php
   2 /**
   3  * Name: Remote Permissions
   4  * Description: Allow the recipients of private posts to see who else can see the post by clicking the lock icon
   5  * Version: 1.0
   6  * Author: Zach <https://f.shmuz.in/profile/techcity>
   7  * Status: Unsupported
   8  */
   9
  10 use Friendica\BaseObject;
  11 use Friendica\Core\Config;
  12 use Friendica\Core\Hook;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\PConfig;
  15 use Friendica\Core\Renderer;
  16 use Friendica\Database\DBA;
  17 use Friendica\Util\ACLFormatter;
  18 use Friendica\Util\Strings;
  19
  20 function remote_permissions_install() {
  21         Hook::register('lockview_content', 'addon/remote_permissions/remote_permissions.php', 'remote_permissions_content');
  22         Hook::register('addon_settings', 'addon/remote_permissions/remote_permissions.php', 'remote_permissions_settings');
  23         Hook::register('addon_settings_post', 'addon/remote_permissions/remote_permissions.php', 'remote_permissions_settings_post');
  24 }
  25
  26 function remote_permissions_uninstall() {
  27         Hook::unregister('lockview_content', 'addon/remote_permissions/remote_permissions.php', 'remote_permissions_content');
  28         Hook::unregister('addon_settings', 'addon/remote_permissions/remote_permissions.php', 'remote_permissions_settings');
  29         Hook::unregister('addon_settings_post', 'addon/remote_permissions/remote_permissions.php', 'remote_permissions_settings_post');
  30 }
  31
  32 function remote_permissions_settings(&$a,&$o) {
  33
  34         if(! local_user())
  35                 return;
  36
  37         $global = Config::get("remote_perms", "global");
  38         if($global == 1)
  39                 return;
  40
  41         /* Add our stylesheet to the page so we can make our settings look nice */
  42
  43         $a->page['htmlhead'] .= '<link rel="stylesheet"  type="text/css" href="' . $a->getBaseURL() . '/addon/remote_permissions/settings.css' . '" media="all" />' . "\r\n";
  44
  45         /* Get the current state of our config variable */
  46
  47         $remote_perms = PConfig::get(local_user(),'remote_perms','show');
  48
  49         /* Add some HTML to the existing form */
  50
  51 //      $t = file_get_contents("addon/remote_permissions/settings.tpl" );
  52         $t = Renderer::getMarkupTemplate("settings.tpl", "addon/remote_permissions/" );
  53         $o .= Renderer::replaceMacros($t, [
  54                 '$remote_perms_title' => L10n::t('Remote Permissions Settings'),
  55                 '$remote_perms_label' => L10n::t('Allow recipients of your private posts to see the other recipients of the posts'),
  56                 '$checked' => (($remote_perms == 1) ? 'checked="checked"' : ''),
  57                 '$submit' => L10n::t('Save Settings')
  58         ]);
  59
  60 }
  61
  62 function remote_permissions_settings_post($a,$post) {
  63         if(! local_user() || empty($_POST['remote-perms-submit']))
  64                 return;
  65
  66         PConfig::set(local_user(),'remote_perms','show',intval($_POST['remote-perms']));
  67         info(L10n::t('Remote Permissions settings updated.') . EOL);
  68 }
  69
  70 function remote_permissions_content($a, $item_copy) {
  71
  72         if($item_copy['uid'] != local_user())
  73                 return;
  74
  75         if(Config::get('remote_perms','global') == 0) {
  76                 // Admin has set Individual choice. We need to find
  77                 // the original poster. First, get the contact's info
  78                 $r = q("SELECT nick, url FROM contact WHERE id = %d LIMIT 1",
  79                        intval($item_copy['contact-id'])
  80                 );
  81                 if(! $r)
  82                         return;
  83
  84                 // Find out if the contact lives here
  85                 $baseurl = $a->getBaseURL();
  86                 $baseurl = substr($baseurl, strpos($baseurl, '://') + 3);
  87                 if(strpos($r[0]['url'], $baseurl) === false)
  88                         return;
  89
  90                 // The contact lives here. Get his/her user info
  91                 $nick = $r[0]['nick'];
  92                 $r = q("SELECT uid FROM user WHERE nickname = '%s' LIMIT 1",
  93                        DBA::escape($nick)
  94                 );
  95                 if(! $r)
  96                         return;
  97
  98                 if(PConfig::get($r[0]['uid'],'remote_perms','show') == 0)
  99                         return;
 100         }
 101
 102         if(($item_copy['private'] == 1) && (! strlen($item_copy['allow_cid'])) && (! strlen($item_copy['allow_gid']))
 103                 && (! strlen($item_copy['deny_cid'])) && (! strlen($item_copy['deny_gid']))) {
 104
 105                 $allow_names = [];
 106
 107                 // Check for the original post here -- that's the only way
 108                 // to definitely get all of the recipients
 109
 110                 if($item_copy['uri'] === $item_copy['parent-uri']) {
 111                         // Lockview for a top-level post
 112                         $r = q("SELECT allow_cid, allow_gid, deny_cid, deny_gid FROM item WHERE uri = '%s' AND type = 'wall' LIMIT 1",
 113                                    DBA::escape($item_copy['uri'])
 114                         );
 115                 }
 116                 else {
 117                         // Lockview for a comment
 118                         $r = q("SELECT allow_cid, allow_gid, deny_cid, deny_gid FROM item WHERE uri = '%s'
 119                                 AND parent = ( SELECT id FROM item WHERE uri = '%s' AND type = 'wall' ) LIMIT 1",
 120                                    DBA::escape($item_copy['uri']),
 121                                    DBA::escape($item_copy['parent-uri'])
 122                         );
 123                 }
 124                 if($r) {
 125
 126                         $item = $r[0];
 127
 128                         /** @var ACLFormatter $aclFormatter */
 129                         $aclFormatter = BaseObject::getClass(ACLFormatter::class);
 130
 131                         $allowed_users = $aclFormatter->expand($item['allow_cid'] ?? '');
 132                         $allowed_groups = $aclFormatter->expand($item['allow_gid'] ?? '');
 133                         $deny_users = $aclFormatter->expand($item['deny_cid'] ?? '');
 134                         $deny_groups = $aclFormatter->expand($item['deny_gid'] ?? '');
 135
 136                         $o = L10n::t('Visible to:') . '<br />';
 137                         $allow = [];
 138                         $deny = [];
 139
 140                         if(count($allowed_groups)) {
 141                                 $r = q("SELECT DISTINCT `contact-id` FROM group_member WHERE gid IN ( %s )",
 142                                         DBA::escape(implode(', ', $allowed_groups))
 143                                 );
 144                                 foreach($r as $rr)
 145                                         $allow[] = $rr['contact-id'];
 146                         }
 147                         $allow = array_unique($allow + $allowed_users);
 148
 149                         if(count($deny_groups)) {
 150                                 $r = q("SELECT DISTINCT `contact-id` FROM group_member WHERE gid IN ( %s )",
 151                                         DBA::escape(implode(', ', $deny_groups))
 152                                 );
 153                                 foreach($r as $rr)
 154                                         $deny[] = $rr['contact-id'];
 155                         }
 156                         $deny = $deny + $deny_users;
 157
 158                         if($allow)
 159                         {
 160                                 $r = q("SELECT name FROM contact WHERE id IN ( %s )",
 161                                            DBA::escape(implode(', ', array_diff($allow, $deny)))
 162                                 );
 163                                 foreach($r as $rr)
 164                                         $allow_names[] = $rr['name'];
 165                         }
 166                 }
 167                 else {
 168                         // We don't have the original post. Let's try for the next best thing:
 169                         // checking who else has the post on our own server. Note that comments
 170                         // that were sent to Diaspora and were relayed to others on our server
 171                         // will have different URIs than the original. We can match the GUID for
 172                         // those
 173                         $r = q("SELECT `uid` FROM item WHERE uri = '%s' OR guid = '%s'",
 174                                    DBA::escape($item_copy['uri']),
 175                                DBA::escape($item_copy['guid'])
 176                         );
 177                         if(! $r)
 178                                 return;
 179
 180                         $allow = [];
 181                         foreach($r as $rr)
 182                                 $allow[] = $rr['uid'];
 183
 184                         $r = q("SELECT username FROM user WHERE uid IN ( %s )",
 185                                 DBA::escape(implode(', ', $allow))
 186                         );
 187                         if(! $r)
 188                                 return;
 189
 190                         $o = L10n::t('Visible to') . ' (' . L10n::t('may only be a partial list') . '):<br />';
 191
 192                         foreach($r as $rr)
 193                                 $allow_names[] = $rr['username'];
 194                 }
 195
 196                 // Sort the names alphabetically, case-insensitive
 197                 natcasesort($allow_names);
 198                 echo $o . implode(', ', $allow_names);
 199                 exit();
 200         }
 201
 202         return;
 203 }
 204
 205 function remote_permissions_addon_admin(&$a, &$o){
 206         $t = Renderer::getMarkupTemplate( "admin.tpl", "addon/remote_permissions/" );
 207         $o = Renderer::replaceMacros($t, [
 208                 '$submit' => L10n::t('Save Settings'),
 209                 '$global' => ['remotepermschoice', L10n::t('Global'), 1, L10n::t('The posts of every user on this server show the post recipients'),  Config::get('remote_perms', 'global') == 1],
 210                 '$individual' => ['remotepermschoice', L10n::t('Individual'), 2, L10n::t('Each user chooses whether his/her posts show the post recipients'),  Config::get('remote_perms', 'global') == 0]
 211         ]);
 212 }
 213
 214 function remote_permissions_addon_admin_post(&$a){
 215         $choice =       (!empty($_POST['remotepermschoice'])            ? Strings::escapeTags(trim($_POST['remotepermschoice']))        : '');
 216         Config::set('remote_perms','global',($choice == 1 ? 1 : 0));
 217         info(L10n::t('Settings updated.'). EOL);
 218 }