%%%---------------------------------------------------------------------- %%% File : nodetree_tree_sql.erl %%% Author : Christophe Romain %%% Purpose : Standard node tree plugin with ODBC backend %%% Created : 1 Dec 2007 by Christophe Romain %%% %%% %%% ejabberd, Copyright (C) 2002-2019 ProcessOne %%% %%% This program is free software; you can redistribute it and/or %%% modify it under the terms of the GNU General Public License as %%% published by the Free Software Foundation; either version 2 of the %%% License, or (at your option) any later version. %%% %%% This program is distributed in the hope that it will be useful, %%% but WITHOUT ANY WARRANTY; without even the implied warranty of %%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU %%% General Public License for more details. %%% %%% You should have received a copy of the GNU General Public License along %%% with this program; if not, write to the Free Software Foundation, Inc., %%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. %%% %%%---------------------------------------------------------------------- %%% @doc The module {@module} is the default PubSub node tree plugin. %%%

It is used as a default for all unknown PubSub node type. It can serve %%% as a developer basis and reference to build its own custom pubsub node tree %%% types.

%%%

PubSub node tree plugins are using the {@link gen_nodetree} behaviour.

%%%

The API isn't stabilized yet. The pubsub plugin %%% development is still a work in progress. However, the system is already %%% useable and useful as is. Please, send us comments, feedback and %%% improvements.

-module(nodetree_tree_sql). -behaviour(gen_pubsub_nodetree). -author('christophe.romain@process-one.net'). -compile([{parse_transform, ejabberd_sql_pt}]). -include("pubsub.hrl"). -include("xmpp.hrl"). -include("ejabberd_sql_pt.hrl"). -export([init/3, terminate/2, options/0, set_node/1, get_node/3, get_node/2, get_node/1, get_nodes/2, get_nodes/1, get_parentnodes/3, get_parentnodes_tree/3, get_subnodes/3, get_subnodes_tree/3, create_node/6, delete_node/2]). -export([raw_to_node/2]). init(_Host, _ServerHost, _Opts) -> ok. terminate(_Host, _ServerHost) -> ok. options() -> [{sql, true} | nodetree_tree:options()]. set_node(Record) when is_record(Record, pubsub_node) -> {Host, Node} = Record#pubsub_node.nodeid, Parent = case Record#pubsub_node.parents of [] -> <<>>; [First | _] -> First end, Type = Record#pubsub_node.type, H = node_flat_sql:encode_host(Host), Nidx = case nodeidx(Host, Node) of {result, OldNidx} -> catch ejabberd_sql:sql_query_t( ?SQL("delete from pubsub_node_option " "where nodeid=%(OldNidx)d")), catch ejabberd_sql:sql_query_t( ?SQL("update pubsub_node set" " host=%(H)s, node=%(Node)s," " parent=%(Parent)s, plugin=%(Type)s " "where nodeid=%(OldNidx)d")), OldNidx; _ -> catch ejabberd_sql:sql_query_t( ?SQL("insert into pubsub_node(host, node, parent, plugin) " "values(%(H)s, %(Node)s, %(Parent)s, %(Type)s)")), case nodeidx(Host, Node) of {result, NewNidx} -> NewNidx; _ -> none % this should not happen end end, case Nidx of none -> Txt = <<"Node index not found">>, {error, xmpp:err_internal_server_error(Txt, ejabberd_config:get_mylang())}; _ -> lists:foreach(fun ({Key, Value}) -> SKey = iolist_to_binary(atom_to_list(Key)), SValue = misc:term_to_expr(Value), catch ejabberd_sql:sql_query_t( ?SQL("insert into pubsub_node_option(nodeid, name, val) " "values (%(Nidx)d, %(SKey)s, %(SValue)s)")) end, Record#pubsub_node.options), {result, Nidx} end. get_node(Host, Node, _From) -> get_node(Host, Node). get_node(Host, Node) -> H = node_flat_sql:encode_host(Host), case catch ejabberd_sql:sql_query_t( ?SQL("select @(node)s, @(parent)s, @(plugin)s, @(nodeid)d from pubsub_node " "where host=%(H)s and node=%(Node)s")) of {selected, [RItem]} -> raw_to_node(Host, RItem); {'EXIT', _Reason} -> {error, xmpp:err_internal_server_error(<<"Database failure">>, ejabberd_config:get_mylang())}; _ -> {error, xmpp:err_item_not_found(<<"Node not found">>, ejabberd_config:get_mylang())} end. get_node(Nidx) -> case catch ejabberd_sql:sql_query_t( ?SQL("select @(host)s, @(node)s, @(parent)s, @(plugin)s from pubsub_node " "where nodeid=%(Nidx)d")) of {selected, [{Host, Node, Parent, Type}]} -> raw_to_node(Host, {Node, Parent, Type, Nidx}); {'EXIT', _Reason} -> {error, xmpp:err_internal_server_error(<<"Database failure">>, ejabberd_config:get_mylang())}; _ -> {error, xmpp:err_item_not_found(<<"Node not found">>, ejabberd_config:get_mylang())} end. get_nodes(Host, _From) -> get_nodes(Host). get_nodes(Host) -> H = node_flat_sql:encode_host(Host), case catch ejabberd_sql:sql_query_t( ?SQL("select @(node)s, @(parent)s, @(plugin)s, @(nodeid)d from pubsub_node " "where host=%(H)s")) of {selected, RItems} -> [raw_to_node(Host, Item) || Item <- RItems]; _ -> [] end. get_parentnodes(Host, Node, _From) -> case get_node(Host, Node) of Record when is_record(Record, pubsub_node) -> Record#pubsub_node.parents; _ -> [] end. get_parentnodes_tree(Host, Node, _From) -> get_parentnodes_tree(Host, Node, 0, []). get_parentnodes_tree(Host, Node, Level, Acc) -> case get_node(Host, Node) of Record when is_record(Record, pubsub_node) -> Tree = [{Level, [Record]}|Acc], case Record#pubsub_node.parents of [Parent] -> get_parentnodes_tree(Host, Parent, Level+1, Tree); _ -> Tree end; _ -> Acc end. get_subnodes(Host, Node, _From) -> get_subnodes(Host, Node). get_subnodes(Host, Node) -> H = node_flat_sql:encode_host(Host), case catch ejabberd_sql:sql_query_t( ?SQL("select @(node)s, @(parent)s, @(plugin)s, @(nodeid)d from pubsub_node " "where host=%(H)s and parent=%(Node)s")) of {selected, RItems} -> [raw_to_node(Host, Item) || Item <- RItems]; _ -> [] end. get_subnodes_tree(Host, Node, _From) -> get_subnodes_tree(Host, Node). get_subnodes_tree(Host, Node) -> case get_node(Host, Node) of {error, _} -> []; Rec -> Type = Rec#pubsub_node.type, H = node_flat_sql:encode_host(Host), N = <<(ejabberd_sql:escape_like_arg_circumflex(Node))/binary, "/%">>, Sub = case catch ejabberd_sql:sql_query_t( ?SQL("select @(node)s, @(parent)s, @(plugin)s, @(nodeid)d from pubsub_node " "where host=%(H)s and plugin=%(Type)s and" " (parent=%(Node)s or parent like %(N)s escape '^')")) of {selected, RItems} -> [raw_to_node(Host, Item) || Item <- RItems]; _ -> [] end, [Rec|Sub] end. create_node(Host, Node, Type, Owner, Options, Parents) -> BJID = jid:tolower(jid:remove_resource(Owner)), case nodeidx(Host, Node) of {error, not_found} -> ParentExists = case Host of {_U, _S, _R} -> %% This is special case for PEP handling %% PEP does not uses hierarchy true; _ -> case Parents of [] -> true; [Parent | _] -> case nodeidx(Host, Parent) of {result, PNode} -> case nodeowners(PNode) of [{<<>>, Host, <<>>}] -> true; Owners -> lists:member(BJID, Owners) end; _ -> false end; _ -> false end end, case ParentExists of true -> case set_node(#pubsub_node{nodeid = {Host, Node}, parents = Parents, type = Type, options = Options}) of {result, Nidx} -> {ok, Nidx}; Other -> Other end; false -> {error, xmpp:err_forbidden()} end; {result, _} -> {error, xmpp:err_conflict(<<"Node already exists">>, ejabberd_config:get_mylang())}; {error, db_fail} -> {error, xmpp:err_internal_server_error(<<"Database failure">>, ejabberd_config:get_mylang())} end. delete_node(Host, Node) -> lists:map( fun(Rec) -> Nidx = Rec#pubsub_node.id, catch ejabberd_sql:sql_query_t( ?SQL("delete from pubsub_node where nodeid=%(Nidx)d")), Rec end, get_subnodes_tree(Host, Node)). %% helpers raw_to_node(Host, [Node, Parent, Type, Nidx]) -> raw_to_node(Host, {Node, Parent, Type, binary_to_integer(Nidx)}); raw_to_node(Host, {Node, Parent, Type, Nidx}) -> Options = case catch ejabberd_sql:sql_query_t( ?SQL("select @(name)s, @(val)s from pubsub_node_option " "where nodeid=%(Nidx)d")) of {selected, ROptions} -> DbOpts = lists:map(fun ({Key, Value}) -> RKey = misc:binary_to_atom(Key), Tokens = element(2, erl_scan:string(binary_to_list(<>))), RValue = element(2, erl_parse:parse_term(Tokens)), {RKey, RValue} end, ROptions), Module = misc:binary_to_atom(<<"node_", Type/binary, "_sql">>), StdOpts = Module:options(), lists:foldl(fun ({Key, Value}, Acc) -> lists:keystore(Key, 1, Acc, {Key, Value}) end, StdOpts, DbOpts); _ -> [] end, Parents = case Parent of <<>> -> []; _ -> [Parent] end, #pubsub_node{nodeid = {Host, Node}, id = Nidx, parents = Parents, type = Type, options = Options}. nodeidx(Host, Node) -> H = node_flat_sql:encode_host(Host), case catch ejabberd_sql:sql_query_t( ?SQL("select @(nodeid)d from pubsub_node " "where host=%(H)s and node=%(Node)s")) of {selected, [{Nidx}]} -> {result, Nidx}; {'EXIT', _Reason} -> {error, db_fail}; _ -> {error, not_found} end. nodeowners(Nidx) -> {result, Res} = node_flat_sql:get_node_affiliations(Nidx), [LJID || {LJID, Aff} <- Res, Aff =:= owner].