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