<?php /** @file */ // // Takes a $uid and the channel associated with the uid, and a url/handle and adds a new channel // Returns an array // $return['success'] boolean true if successful // $return['abook'] Address book entry joined with xchan if successful // $return['message'] error text if success is false. require_once('include/zot.php'); function new_contact($uid,$url,$channel,$interactive = false, $confirm = false) { $result = [ 'success' => false, 'message' => '' ]; $my_perms = false; $is_zot = false; $protocol = ''; if(substr($url,0,1) === '[') { $x = strpos($url,']'); if($x) { $protocol = substr($url,1,$x-1); $url = substr($url,$x+1); } } $is_http = ((strpos($url,'://') !== false) ? true : false); if($is_http && substr($url,-1,1) === '/') $url = substr($url,0,-1); if(! allowed_url($url)) { $result['message'] = t('Channel is blocked on this site.'); return $result; } if(! $url) { $result['message'] = t('Channel location missing.'); return $result; } // check service class limits $r = q("select count(*) as total from abook where abook_channel = %d and abook_self = 0 ", intval($uid) ); if($r) $total_channels = $r[0]['total']; if(! service_class_allows($uid,'total_channels',$total_channels)) { $result['message'] = upgrade_message(); return $result; } $arr = array('url' => $url, 'protocol', 'channel' => array()); call_hooks('follow_init', $arr); if($arr['channel']['success']) $ret = $arr['channel']; elseif((! $is_http) && ((! $protocol) || (strtolower($protocol) === 'zot'))) $ret = Zotlabs\Zot\Finger::run($url,$channel); if($ret && is_array($ret) && $ret['success']) { $is_zot = true; $j = $ret; } $p = \Zotlabs\Access\Permissions::connect_perms($uid); $my_perms = $p['perms']; if($is_zot && $j) { logger('follow: ' . $url . ' ' . print_r($j,true), LOGGER_DEBUG); if(! ($j['success'] && $j['guid'])) { $result['message'] = t('Response from remote channel was incomplete.'); logger('mod_follow: ' . $result['message']); return $result; } // Premium channel, set confirm before callback to avoid recursion if(array_key_exists('connect_url',$j) && (! $confirm)) { if($interactive) { goaway(zid($j['connect_url'])); } else { $result['message'] = t('Premium channel - please visit:') . ' ' . zid($j['connect_url']); logger('mod_follow: ' . $result['message']); return $result; } } // do we have an xchan and hubloc? // If not, create them. $x = import_xchan($j); if(array_key_exists('deleted',$j) && intval($j['deleted'])) { $result['message'] = t('Channel was deleted and no longer exists.'); return $result; } if(! $x['success']) return $x; $xchan_hash = $x['hash']; if( array_key_exists('permissions',$j) && array_key_exists('data',$j['permissions'])) { $permissions = crypto_unencapsulate(array( 'data' => $j['permissions']['data'], 'alg' => $j['permissions']['alg'], 'key' => $j['permissions']['key'], 'iv' => $j['permissions']['iv']), $channel['channel_prvkey']); if($permissions) $permissions = json_decode($permissions,true); logger('decrypted permissions: ' . print_r($permissions,true), LOGGER_DATA); } else $permissions = $j['permissions']; if(is_array($permissions) && $permissions) { foreach($permissions as $k => $v) { set_abconfig($channel['channel_uid'],$xchan_hash,'their_perms',$k,intval($v)); } } } else { $xchan_hash = ''; $sql_options = (($protocol) ? " and xchan_network = '" . dbesc($protocol) . "' " : ''); $r = q("select * from xchan where (xchan_addr = '%s' or xchan_url = '%s') $sql_options ", dbesc($url), dbesc($url) ); if(! $r) { // attempt network auto-discovery $wf = discover_by_webbie($url,$protocol); if((! $wf) && ($is_http)) { // try RSS discovery $feeds = get_config('system','feed_contacts'); if(($feeds) && ($protocol === '' || $protocol === 'feed' || $protocol === 'rss')) { $d = discover_by_url($url); } else { $result['message'] = t('Remote channel or protocol unavailable.'); return $result; } } if($wf || $d) { $r = q("select * from xchan where xchan_hash = '%s' or xchan_url = '%s'", dbesc(($wf) ? $wf : $url), dbesc($url) ); } } $xchan = zot_record_preferred($r,'xchan_network'); // if discovery was a success we should have an xchan record in $r if($xchan) { $xchan_hash = $xchan['xchan_hash']; $their_perms = 0; } } if(! $xchan_hash) { $result['message'] = t('Channel discovery failed.'); logger('follow: ' . $result['message']); return $result; } $allowed = (($is_zot || in_array($xchan['xchan_network'],['rss','zot6'])) ? 1 : 0); $x = array('channel_id' => $uid, 'follow_address' => $url, 'xchan' => $xchan, 'allowed' => $allowed, 'singleton' => 0); call_hooks('follow_allow',$x); if(! $x['allowed']) { $result['message'] = t('Protocol disabled.'); return $result; } $singleton = intval($x['singleton']); $aid = $channel['channel_account_id']; $hash = $channel['channel_hash']; $default_group = $channel['channel_default_group']; if($hash == $xchan_hash) { $result['message'] = t('Cannot connect to yourself.'); return $result; } if($xchan['xchan_network'] === 'rss') { // check service class feed limits $r = q("select count(*) as total from abook where abook_account = %d and abook_feed = 1 ", intval($aid) ); if($r) $total_feeds = $r[0]['total']; if(! service_class_allows($uid,'total_feeds',$total_feeds)) { $result['message'] = upgrade_message(); return $result; } // Always set these "remote" permissions for feeds since we cannot interact with them // to negotiate a suitable permission response set_abconfig($uid,$xchan_hash,'their_perms','view_stream',1); set_abconfig($uid,$xchan_hash,'their_perms','republish',1); } $profile_assign = get_pconfig($uid,'system','profile_assign',''); $r = q("select abook_id, abook_xchan, abook_pending, abook_instance from abook where abook_xchan = '%s' and abook_channel = %d limit 1", dbesc($xchan_hash), intval($uid) ); if($r) { $abook_instance = $r[0]['abook_instance']; if(($singleton) && strpos($abook_instance,z_root()) === false) { if($abook_instance) $abook_instance .= ','; $abook_instance .= z_root(); $x = q("update abook set abook_instance = '%s', abook_not_here = 0 where abook_id = %d", dbesc($abook_instance), intval($r[0]['abook_id']) ); } if(intval($r[0]['abook_pending'])) { $x = q("update abook set abook_pending = 0 where abook_id = %d", intval($r[0]['abook_id']) ); } } else { $closeness = get_pconfig($uid,'system','new_abook_closeness',80); $r = abook_store_lowlevel( [ 'abook_account' => intval($aid), 'abook_channel' => intval($uid), 'abook_closeness' => intval($closeness), 'abook_xchan' => $xchan_hash, 'abook_profile' => $profile_assign, 'abook_feed' => intval(($xchan['xchan_network'] === 'rss') ? 1 : 0), 'abook_created' => datetime_convert(), 'abook_updated' => datetime_convert(), 'abook_instance' => (($singleton) ? z_root() : '') ] ); } if(! $r) logger('mod_follow: abook creation failed'); if($my_perms) { foreach($my_perms as $k => $v) { set_abconfig($uid,$xchan_hash,'my_perms',$k,$v); } } $r = q("select abook.*, xchan.* from abook left join xchan on abook_xchan = xchan_hash where abook_xchan = '%s' and abook_channel = %d limit 1", dbesc($xchan_hash), intval($uid) ); if($r) { $result['abook'] = $r[0]; Zotlabs\Daemon\Master::Summon(array('Notifier', 'permission_create', $result['abook']['abook_id'])); } $arr = array('channel_id' => $uid, 'channel' => $channel, 'abook' => $result['abook']); call_hooks('follow', $arr); /** If there is a default group for this channel, add this connection to it */ if($default_group) { require_once('include/group.php'); $g = group_rec_byhash($uid,$default_group); if($g) group_add_member($uid,'',$xchan_hash,$g['id']); } $result['success'] = true; return $result; }