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283 lines
No EOL
7 KiB
PHP
283 lines
No EOL
7 KiB
PHP
<?php /** @file */
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namespace Zotlabs\Lib;
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use App;
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use Zotlabs\Access\Permissions;
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use Zotlabs\Daemon\Run;
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class Connect {
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/**
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* Takes a $channel and a $url/handle and adds a new connection
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*
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* Returns array
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* $return['success'] boolean true if successful
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* $return['abook'] Address book entry joined with xchan if successful
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* $return['message'] error text if success is false.
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*
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* This function does NOT send sync packets to clones. The caller is responsible for doing this
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*/
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static function connect($channel, $url, $sub_channel = false) {
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$uid = $channel['channel_id'];
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if (strpos($url,'@') === false && strpos($url,'/') === false) {
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$url = $url . '@' . App::get_hostname();
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}
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$result = [ 'success' => false, 'message' => '' ];
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$my_perms = false;
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$protocol = '';
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$ap_allowed = get_config('system','activitypub',true) && get_pconfig($uid,'system','activitypub',true);
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if (substr($url,0,1) === '[') {
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$x = strpos($url,']');
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if ($x) {
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$protocol = substr($url,1,$x-1);
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$url = substr($url,$x+1);
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}
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}
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if (! check_siteallowed($url)) {
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$result['message'] = t('Channel is blocked on this site.');
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return $result;
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}
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if (! $url) {
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$result['message'] = t('Channel location missing.');
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return $result;
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}
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// check service class limits
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$r = q("select count(*) as total from abook where abook_channel = %d and abook_self = 0 ",
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intval($uid)
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);
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if ($r) {
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$total_channels = $r[0]['total'];
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}
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if (! service_class_allows($uid,'total_channels',$total_channels)) {
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$result['message'] = upgrade_message();
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return $result;
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}
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$xchan_hash = '';
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$sql_options = (($protocol) ? " and xchan_network = '" . dbesc($protocol) . "' " : '');
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$r = q("select * from xchan where ( xchan_hash = '%s' or xchan_url = '%s' or xchan_addr = '%s') $sql_options ",
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dbesc($url),
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dbesc($url),
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dbesc($url)
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);
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if ($r) {
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// reset results to the best record or the first if we don't have the best
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// note: this is a single record and not an array of results
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$r = Libzot::zot_record_preferred($r,'xchan_network');
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// Some Hubzilla records were originally stored as activitypub. If we find one, force rediscovery
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// since Zap cannot connect with them.
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if (($r['xchan_network'] === 'activitypub') && (! $ap_allowed)) {
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$r = null;
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}
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}
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$singleton = false;
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if (! $r) {
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// not in cache - try discovery
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$wf = discover_by_webbie($url,$protocol,false);
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if (! $wf) {
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$result['message'] = t('Remote channel or protocol unavailable.');
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return $result;
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}
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}
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if ($wf) {
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// something was discovered - find the record which was just created.
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$r = q("select * from xchan where ( xchan_hash = '%s' or xchan_url = '%s' or xchan_addr = '%s' ) $sql_options",
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dbesc(($wf) ? $wf : $url),
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dbesc($url),
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dbesc($url)
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);
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// convert to a single record (once again preferring a zot solution in the case of multiples)
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if ($r) {
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$r = Libzot::zot_record_preferred($r,'xchan_network');
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}
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}
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// if discovery was a success or the channel was already cached we should have an xchan record in $r
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if ($r) {
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$xchan = $r;
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$xchan_hash = $r['xchan_hash'];
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$their_perms = EMPTY_STR;
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}
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// failure case
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if (! $xchan_hash) {
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$result['message'] = t('Channel discovery failed.');
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logger('follow: ' . $result['message']);
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return $result;
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}
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if (! check_channelallowed($xchan_hash)) {
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$result['message'] = t('Channel is blocked on this site.');
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logger('follow: ' . $result['message']);
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return $result;
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}
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if ($r['xchan_network'] === 'activitypub') {
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if (! $ap_allowed) {
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$result['message'] = t('Protocol not supported');
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return $result;
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}
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$singleton = true;
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}
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// Now start processing the new connection
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$aid = $channel['channel_account_id'];
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$hash = $channel['channel_hash'];
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$default_group = $channel['channel_default_group'];
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if ($hash === $xchan_hash) {
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$result['message'] = t('Cannot connect to yourself.');
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return $result;
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}
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$p = Permissions::connect_perms($uid);
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// parent channels have unencumbered write permission
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if ($sub_channel) {
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$p['perms']['post_wall'] = 1;
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$p['perms']['post_comments'] = 1;
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$p['perms']['write_storage'] = 1;
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$p['perms']['post_like'] = 1;
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$p['perms']['delegate'] = 0;
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$p['perms']['moderated'] = 0;
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}
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$my_perms = Permissions::serialise($p['perms']);
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$profile_assign = get_pconfig($uid,'system','profile_assign','');
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// See if we are already connected by virtue of having an abook record
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$r = q("select abook_id, abook_xchan, abook_pending, abook_instance from abook
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where abook_xchan = '%s' and abook_channel = %d limit 1",
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dbesc($xchan_hash),
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intval($uid)
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);
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if ($r) {
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$abook_instance = $r[0]['abook_instance'];
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// If they are on a non-nomadic network, add them to this location
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if (($singleton) && strpos($abook_instance,z_root()) === false) {
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if ($abook_instance) {
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$abook_instance .= ',';
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}
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$abook_instance .= z_root();
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$x = q("update abook set abook_instance = '%s', abook_not_here = 0 where abook_id = %d",
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dbesc($abook_instance),
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intval($r[0]['abook_id'])
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);
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}
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// if they have a pending connection, we just followed them so approve the connection request
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if (intval($r[0]['abook_pending'])) {
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$x = q("update abook set abook_pending = 0 where abook_id = %d",
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intval($r[0]['abook_id'])
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);
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}
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}
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else {
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// create a new abook record
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$closeness = get_pconfig($uid,'system','new_abook_closeness',80);
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$r = abook_store_lowlevel(
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[
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'abook_account' => intval($aid),
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'abook_channel' => intval($uid),
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'abook_closeness' => intval($closeness),
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'abook_xchan' => $xchan_hash,
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'abook_profile' => $profile_assign,
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'abook_feed' => intval(($xchan['xchan_network'] === 'rss') ? 1 : 0),
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'abook_created' => datetime_convert(),
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'abook_updated' => datetime_convert(),
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'abook_instance' => (($singleton) ? z_root() : '')
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]
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);
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}
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if (! $r) {
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logger('abook creation failed');
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$result['message'] = t('error saving data');
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return $result;
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}
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// Set suitable permissions to the connection
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if ($my_perms) {
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set_abconfig($uid,$xchan_hash,'system','my_perms',$my_perms);
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}
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// fetch the entire record
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$r = q("select abook.*, xchan.* from abook left join xchan on abook_xchan = xchan_hash
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where abook_xchan = '%s' and abook_channel = %d limit 1",
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dbesc($xchan_hash),
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intval($uid)
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);
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if ($r) {
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$result['abook'] = array_shift($r);
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Run::Summon([ 'Notifier', 'permissions_create', $result['abook']['abook_id'] ]);
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}
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$arr = [ 'channel_id' => $uid, 'channel' => $channel, 'abook' => $result['abook'] ];
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call_hooks('follow', $arr);
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/** If there is a default group for this channel, add this connection to it */
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if ($default_group) {
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$g = AccessList::rec_byhash($uid,$default_group);
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if ($g) {
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AccessList::member_add($uid,'',$xchan_hash,$g['id']);
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}
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}
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$result['success'] = true;
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return $result;
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}
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} |