port Lib/Connect and Module/Follow from zap. Connect with new connections via zot6

2 files changed, 726 insertions, 0 deletions

diff --git a/Zotlabs/Lib/AccessList.php b/Zotlabs/Lib/AccessList.php
new file mode 100644
index 000000000..3c008f8c7
--- /dev/null
+++ b/Zotlabs/Lib/AccessList.php
@@ -0,0 +1,411 @@
+<?php 
+
+namespace Zotlabs\Lib;
+
+use Zotlabs\Lib\Libsync;
+
+
+class AccessList {
+	
+	static function add($uid,$name,$public = 0) {
+
+		$ret = false;
+		if ($uid && $name) {
+			$r = self::byname($uid,$name); // check for dups
+			if ($r !== false) {
+
+				// This could be a problem. 
+				// Let's assume we've just created a list which we once deleted
+				// all the old members are gone, but the list remains so we don't break any security
+				// access lists. What we're doing here is reviving the dead list, but old content which
+				// was restricted to this list may now be seen by the new list members. 
+
+				$z = q("SELECT * FROM pgrp WHERE id = %d LIMIT 1",
+					intval($r)
+				);
+				if(($z) && $z[0]['deleted']) {
+					q('UPDATE pgrp SET deleted = 0 WHERE id = %d', intval($z[0]['id']));
+					notice( t('A deleted list with this name was revived. Existing item permissions <strong>may</strong> apply to this list and any future members. If this is not what you intended, please create another list with a different name.') . EOL); 
+				}
+				return true;
+			}
+
+			$hash = new_uuid();
+
+			$r = q("INSERT INTO pgrp ( hash, uid, visible, gname )
+				VALUES( '%s', %d, %d, '%s' ) ",
+				dbesc($hash),
+				intval($uid),
+				intval($public),
+				dbesc($name)
+			);
+			$ret = $r;
+		}
+
+		Libsync::build_sync_packet($uid,null,true);
+		return $ret;
+	}
+
+
+	static function remove($uid,$name) {
+		$ret = false;
+		if ($uid && $name) {
+			$r = q("SELECT id, hash FROM pgrp WHERE uid = %d AND gname = '%s' LIMIT 1",
+				intval($uid),
+				dbesc($name)
+			);
+			if ($r) {
+				$group_id = $r[0]['id'];
+				$group_hash = $r[0]['hash'];
+			}
+			else {
+				return false;
+			}
+			
+			// remove group from default posting lists
+			$r = q("SELECT channel_default_group, channel_allow_gid, channel_deny_gid FROM channel WHERE channel_id = %d LIMIT 1",
+			       intval($uid)
+			);
+			if ($r) {
+				$user_info = array_shift($r);
+				$change = false;
+
+				if ($user_info['channel_default_group'] == $group_hash) {
+					$user_info['channel_default_group'] = '';
+					$change = true;
+				}
+				if (strpos($user_info['channel_allow_gid'], '<' . $group_hash . '>') !== false) {
+					$user_info['channel_allow_gid'] = str_replace('<' . $group_hash . '>', '', $user_info['channel_allow_gid']);
+					$change = true;
+				}
+				if (strpos($user_info['channel_deny_gid'], '<' . $group_hash . '>') !== false) {
+					$user_info['channel_deny_gid'] = str_replace('<' . $group_hash . '>', '', $user_info['channel_deny_gid']);
+					$change = true;
+				}
+
+				if ($change) {
+					q("UPDATE channel SET channel_default_group = '%s', channel_allow_gid = '%s', channel_deny_gid = '%s' 
+						WHERE channel_id = %d",
+						intval($user_info['channel_default_group']),
+						dbesc($user_info['channel_allow_gid']),
+						dbesc($user_info['channel_deny_gid']),
+						intval($uid)
+					);
+				}
+			}
+
+			// remove all members
+			$r = q("DELETE FROM pgrp_member WHERE uid = %d AND gid = %d ",
+				intval($uid),
+				intval($group_id)
+			);
+
+			// remove group
+			$r = q("UPDATE pgrp SET deleted = 1 WHERE uid = %d AND gname = '%s'",
+				intval($uid),
+				dbesc($name)
+			);
+
+			$ret = $r;
+
+		}
+
+		Libsync::build_sync_packet($uid,null,true);
+
+		return $ret;
+	}
+
+	// returns the integer id of an access group owned by $uid and named $name
+	// or false.
+	
+	static function byname($uid,$name) {
+		if (! ($uid && $name)) {
+			return false;
+		}
+		$r = q("SELECT id FROM pgrp WHERE uid = %d AND gname = '%s' LIMIT 1",
+			intval($uid),
+			dbesc($name)
+		);
+		if ($r) {
+			return $r[0]['id'];
+		}
+		return false;
+	}
+
+	static function by_id($uid,$id) {
+		if (! ($uid && $id)) {
+			return false;
+		}
+		
+		$r = q("SELECT * FROM pgrp WHERE uid = %d AND id = %d and deleted = 0",
+			intval($uid),
+			intval($id)
+		);
+		if ($r) {
+			return array_shift($r);
+		}
+		return false;
+	}
+
+
+
+	static function rec_byhash($uid,$hash) {
+		if (! ( $uid && $hash)) {
+			return false;
+		}
+		$r = q("SELECT * FROM pgrp WHERE uid = %d AND hash = '%s' LIMIT 1",
+			intval($uid),
+			dbesc($hash)
+		);
+		if ($r) {
+			return array_shift($r);
+		}
+		return false;
+	}
+
+
+	static function member_remove($uid,$name,$member) {
+		$gid = self::byname($uid,$name);
+		if (! $gid) {
+			return false;
+		}
+		if (! ($uid && $gid && $member)) {
+			return false;
+		}
+		$r = q("DELETE FROM pgrp_member WHERE uid = %d AND gid = %d AND xchan = '%s' ",
+			intval($uid),
+			intval($gid),
+			dbesc($member)
+		);
+
+		Libsync::build_sync_packet($uid,null,true);
+
+		return $r;
+	}
+
+
+	static function member_add($uid,$name,$member,$gid = 0) {
+		if (! $gid) {
+			$gid = self::byname($uid,$name);
+		}
+		if (! ($gid && $uid && $member)) {
+			return false;
+		}
+
+		$r = q("SELECT * FROM pgrp_member WHERE uid = %d AND gid = %d AND xchan = '%s' LIMIT 1",	
+			intval($uid),
+			intval($gid),
+			dbesc($member)
+		);
+		if ($r) {
+			return true;	// You might question this, but 
+				// we indicate success because the group member was in fact created
+				// -- It was just created at another time
+		}
+	 	else {
+			$r = q("INSERT INTO pgrp_member (uid, gid, xchan)
+				VALUES( %d, %d, '%s' ) ",
+				intval($uid),
+				intval($gid),
+				dbesc($member)
+			);
+		}
+		Libsync::build_sync_packet($uid,null,true);
+		return $r;
+	}
+
+
+	static function members($uid, $gid) {
+		$ret = [];
+		if (intval($gid)) {
+			$r = q("SELECT * FROM pgrp_member 
+				LEFT JOIN abook ON abook_xchan = pgrp_member.xchan left join xchan on xchan_hash = abook_xchan
+				WHERE gid = %d AND abook_channel = %d and pgrp_member.uid = %d and xchan_deleted = 0 and abook_self = 0 and abook_blocked = 0 and abook_pending = 0 ORDER BY xchan_name ASC ",
+				intval($gid),
+				intval($uid),
+				intval($uid)
+			);
+			if ($r) {
+				$ret = $r;
+			}
+		}
+		return $ret;
+	}
+
+	static function members_xchan($uid,$gid) {
+		$ret = [];
+		if (intval($gid)) {
+			$r = q("SELECT xchan FROM pgrp_member WHERE gid = %d AND uid = %d",
+				intval($gid),
+				intval($uid)
+			);
+			if ($r) {
+				foreach ($r as $rv) {
+					$ret[] = $rv['xchan'];
+				}
+			}
+		}
+		return $ret;
+	}
+
+	static function members_profile_xchan($uid,$gid) {
+		$ret = [];
+		if (intval($gid)) {
+			$r = q("SELECT abook_xchan as xchan from abook left join profile on abook_profile = profile_guid where profile.id = %d and profile.uid = %d",
+				intval($gid),
+				intval($uid)
+			);
+			if ($r) {
+				foreach($r as $rv) {
+					$ret[] = $rv['xchan'];
+				}
+			}
+		}
+		return $ret;
+	}
+
+
+
+
+	static function select($uid,$group = '') {
+	
+		$grps = [];
+
+		$r = q("SELECT * FROM pgrp WHERE deleted = 0 AND uid = %d ORDER BY gname ASC",
+			intval($uid)
+		);
+		$grps[] = [ 'name' => '', 'hash' => '0', 'selected' => '' ];
+		if ($r) {
+			foreach ($r as $rr) {
+				$grps[] = [ 'name' => $rr['gname'], 'id' => $rr['hash'], 'selected' => (($group == $rr['hash']) ? 'true' : '') ];
+			}
+
+		}
+		
+		return replace_macros(get_markup_template('group_selection.tpl'), [
+			'$label' => t('Add new connections to this access list'),
+			'$groups' => $grps 
+		]);
+	}
+
+
+	static function widget($every="connections",$each="lists",$edit = false, $group_id = 0, $cid = '',$mode = 1) {
+
+		$o = '';
+
+		$groups = [];
+
+		$r = q("SELECT * FROM pgrp WHERE deleted = 0 AND uid = %d ORDER BY gname ASC",
+			intval($_SESSION['uid'])
+		);
+		$member_of = [];
+		if ($cid) {
+			$member_of = self::containing(local_channel(),$cid);
+		} 
+
+		if ($r) {
+			foreach ($r as $rr) {
+				$selected = (($group_id == $rr['id']) ? ' group-selected' : '');
+			
+				if ($edit) {
+					$groupedit = [ 'href' => "lists/".$rr['id'], 'title' => t('edit') ];
+				} 
+				else {
+					$groupedit = null;
+				}
+			
+				$groups[] = [
+					'id'		=> $rr['id'],
+					'enc_cid'   => base64url_encode($cid),
+					'cid'		=> $cid,
+					'text' 		=> $rr['gname'],
+					'selected' 	=> $selected,
+					'href'		=> (($mode == 0) ? $each.'?f=&gid='.$rr['id'] : $each."/".$rr['id']) . ((x($_GET,'new')) ? '&new=' . $_GET['new'] : '') . ((x($_GET,'order')) ? '&order=' . $_GET['order'] : ''),
+					'edit'		=> $groupedit,
+					'ismember'	=> in_array($rr['id'],$member_of),
+				];
+			}
+		}
+		
+		return replace_macros(get_markup_template('group_side.tpl'), [
+			'$title'		=> t('Lists'),
+			'$edittext'     => t('Edit list'),
+			'$createtext' 	=> t('Create new list'),
+			'$ungrouped'    => (($every === 'contacts') ? t('Channels not in any access list') : ''),
+			'$groups'		=> $groups,
+			'$add'			=> t('add'),
+		]);
+
+	}
+
+
+	static function expand($g) {
+		if (! (is_array($g) && count($g))) {
+			return [];
+		}
+
+		$ret = [];
+		$x   = [];
+
+		// private profile linked virtual groups
+
+		foreach ($g as $gv) {
+			if (substr($gv,0,3) === 'vp.') {
+				$profile_hash = substr($gv,3);
+				if ($profile_hash) {
+					$r = q("select abook_xchan from abook where abook_profile = '%s'",
+						dbesc($profile_hash)
+					);
+					if ($r) {
+						foreach ($r as $rv) {
+							$ret[] = $rv['abook_xchan'];
+						}
+					}
+				}
+			}
+			else {
+				$x[] = $gv;
+			}
+		}								 
+
+		if ($x) {
+			stringify_array_elms($x,true);
+			$groups = implode(',', $x);
+			if ($groups) {
+				$r = q("SELECT xchan FROM pgrp_member WHERE gid IN ( select id from pgrp where hash in ( $groups ))");
+				if ($r) {
+					foreach ($r as $rv) {
+						$ret[] = $rv['xchan'];
+					}
+				}
+			}
+		}
+		return $ret;
+	}
+
+
+	static function member_of($c) {
+		$r = q("SELECT pgrp.gname, pgrp.id FROM pgrp LEFT JOIN pgrp_member ON pgrp_member.gid = pgrp.id 
+			WHERE pgrp_member.xchan = '%s' AND pgrp.deleted = 0 ORDER BY pgrp.gname  ASC ",
+			dbesc($c)
+		);
+
+		return $r;
+	}
+
+	static function containing($uid,$c) {
+
+		$r = q("SELECT gid FROM pgrp_member WHERE uid = %d AND pgrp_member.xchan = '%s' ",
+			intval($uid),
+			dbesc($c)
+		);
+
+		$ret = [];
+		if ($r) {
+			foreach ($r as $rv)
+				$ret[] = $rv['gid'];
+		}
+		
+		return $ret;
+	}
+}
\ No newline at end of file
diff --git a/Zotlabs/Lib/Connect.php b/Zotlabs/Lib/Connect.php
new file mode 100644
index 000000000..978a4ce39
--- /dev/null
+++ b/Zotlabs/Lib/Connect.php
@@ -0,0 +1,315 @@
+<?php /** @file */
+
+namespace Zotlabs\Lib;
+
+use App;
+use Zotlabs\Access\Permissions;
+use Zotlabs\Daemon\Master;
+
+
+
+class Connect {
+
+	/**
+	 * Takes a $channel and a $url/handle and adds a new connection
+	 *
+	 * Returns array
+	 *  $return['success'] boolean true if successful
+	 *  $return['abook'] Address book entry joined with xchan if successful
+	 *  $return['message'] error text if success is false.
+	 *
+	 * This function does NOT send sync packets to clones. The caller is responsible for doing this
+	 */
+
+	static function connect($channel, $url, $sub_channel = false) {
+
+		$uid = $channel['channel_id'];
+
+		if (strpos($url,'@') === false && strpos($url,'/') === false) {
+			$url = $url . '@' . App::get_hostname();
+		}
+
+		$result = [ 'success' => false, 'message' => '' ];
+
+		$my_perms = false;
+		$protocol = '';
+
+		if (substr($url,0,1) === '[') {
+			$x = strpos($url,']');
+			if ($x) {
+				$protocol = substr($url,1,$x-1);
+				$url = substr($url,$x+1);
+			}
+		}
+
+		if (! check_siteallowed($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;
+		}
+
+		$xchan_hash = '';
+		$sql_options = (($protocol) ? " and xchan_network = '" . dbesc($protocol) . "' " : '');
+
+		$r = q("select * from xchan where ( xchan_hash = '%s' or xchan_url = '%s' or xchan_addr = '%s') $sql_options ",
+			dbesc($url),
+			dbesc($url),
+			dbesc($url)
+		);
+
+		if ($r) {
+
+			// reset results to the best record or the first if we don't have the best
+			// note: this is a single record and not an array of results
+
+			$r = Libzot::zot_record_preferred($r,'xchan_network');
+
+		}
+
+		$singleton = false;
+		$d = false;
+
+		if (! $r) {
+
+			// not in cache - try discovery
+
+			$wf = discover_by_webbie($url,$protocol);
+
+			if (! $wf) {
+				$feeds = get_config('system','feed_contacts');
+
+				if (($feeds) && (in_array($protocol, [ '', 'feed', 'rss' ]))) {
+					$d = discover_feed($url);
+				}
+				else {
+					$result['message'] = t('Remote channel or protocol unavailable.');
+					return $result;
+				}
+			}
+		}
+
+		if ($wf || $d) {
+
+			// something was discovered - find the record which was just created.
+
+			$r = q("select * from xchan where ( xchan_hash = '%s' or xchan_url = '%s' or xchan_addr = '%s' ) $sql_options",
+				dbesc(($wf) ? $wf : $url),
+				dbesc($url),
+				dbesc($url)
+			);
+
+			// convert to a single record (once again preferring a zot solution in the case of multiples)
+
+			if ($r) {
+				$r = Libzot::zot_record_preferred($r,'xchan_network');
+			}
+		}
+
+		// if discovery was a success or the channel was already cached we should have an xchan record in $r
+
+		if ($r) {
+			$xchan = $r;
+			$xchan_hash = $r['xchan_hash'];
+			$their_perms = EMPTY_STR;
+		}
+
+		// failure case
+
+		if (! $xchan_hash) {
+			$result['message'] = t('Channel discovery failed.');
+			logger('follow: ' . $result['message']);
+			return $result;
+		}
+
+		if (! check_channelallowed($xchan_hash)) {
+			$result['message'] = t('Channel is blocked on this site.');
+			logger('follow: ' . $result['message']);
+			return $result;
+
+		}
+
+		$allowed = ((in_array($xchan['xchan_network'],['rss','zot','zot6'])) ? 1 : 0);
+
+		$hookdata = ['channel_id' => $uid, 'follow_address' => $url, 'xchan' => $xchan, 'allowed' => $allowed, 'singleton' => 0];
+		call_hooks('follow_allow',$hookdata);
+
+		if(! $hookdata['allowed']) {
+			hz_syslog('zesz');
+			$result['message'] = t('Protocol disabled.');
+			return $result;
+		}
+
+		$singleton = intval($hookdata['singleton']);
+
+		// Now start processing the new connection
+
+		$aid = $channel['channel_account_id'];
+		$default_group = $channel['channel_default_group'];
+
+		if (in_array($xchan_hash, [$channel['channel_hash'], $channel['channel_portable_id']])) {
+			$result['message'] = t('Cannot connect to yourself.');
+			return $result;
+		}
+
+		if ($xchan['xchan_network'] === 'rss') {
+
+			// check service class feed limits
+
+			$t = q("select count(*) as total from abook where abook_account = %d and abook_feed = 1 ",
+				intval($aid)
+			);
+			if ($t) {
+				$total_feeds = $t[0]['total'];
+			}
+
+			if (! service_class_allows($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
+
+			$p = get_abconfig($uid,$xchan_hash,'system','their_perms',EMPTY_STR);
+			if ($p) {
+				$p .= ',';
+			}
+			$p .= 'view_stream,republish';
+			set_abconfig($uid,$xchan_hash,'system','their_perms',$p);
+
+		}
+
+
+		$p = Permissions::connect_perms($uid);
+
+		// parent channels have unencumbered write permission
+
+		if ($sub_channel) {
+			$p['perms']['post_wall']     = 1;
+			$p['perms']['post_comments'] = 1;
+			$p['perms']['write_storage'] = 1;
+			$p['perms']['post_like']     = 1;
+			$p['perms']['delegate']      = 0;
+			$p['perms']['moderated']     = 0;
+		}
+
+		$my_perms = Permissions::serialise($p['perms']);
+		
+		$profile_assign = get_pconfig($uid,'system','profile_assign','');
+
+
+		// See if we are already connected by virtue of having an abook record
+
+		$r = q("select abook_id, abook_xchan, abook_pending, abook_instance from abook 
+			where abook_xchan = '%s' and abook_channel = %d limit 1",
+			dbesc($xchan_hash),
+			intval($uid)
+		);
+
+		if ($r) {
+
+			$abook_instance = $r[0]['abook_instance'];
+
+			// If they are on a non-nomadic network, add them to this location
+
+			if (($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($r[0]['abook_id'])
+				);
+			}
+
+			// if they have a pending connection, we just followed them so approve the connection request
+
+			if (intval($r[0]['abook_pending'])) {
+				$x = q("update abook set abook_pending = 0 where abook_id = %d",
+					intval($r[0]['abook_id'])
+				);
+			}
+		}
+		else {
+
+			// create a new abook record
+
+			$closeness = get_pconfig($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('abook creation failed');
+			$result['message'] = t('error saving data');
+			return $result;
+		}
+
+		// Set suitable permissions to the connection
+
+		if ($my_perms) {
+			set_abconfig($uid,$xchan_hash,'system','my_perms',$my_perms);
+		}
+
+		// fetch the entire record
+
+		$r = q("select abook.*, xchan.* from abook left join xchan on abook_xchan = xchan_hash 
+			where abook_xchan = '%s' and abook_channel = %d limit 1",
+			dbesc($xchan_hash),
+			intval($uid)
+		);
+
+		if ($r) {
+			$result['abook'] = array_shift($r);
+			Master::Summon([ 'Notifier', 'permission_create', $result['abook']['abook_id'] ]);
+		}
+
+		$arr = [ '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) {
+			$g = AccessList::rec_byhash($uid,$default_group);
+			if ($g) {
+				AccessList::member_add($uid,'',$xchan_hash,$g['id']);
+			}
+		}
+
+		$result['success'] = true;
+		return $result;
+	}
+}