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%%% ====================================================================
%%% ``The contents of this file are subject to the Erlang Public License,
%%% Version 1.1, (the "License"); you may not use this file except in
%%% compliance with the License. You should have received a copy of the
%%% Erlang Public License along with this software. If not, it can be
%%% retrieved via the world wide web at http://www.erlang.org/.
%%%
%%% Software distributed under the License is distributed on an "AS IS"
%%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%%% the License for the specific language governing rights and limitations
%%% under the License.
%%%
%%% The Initial Developer of the Original Code is ProcessOne.
%%% Portions created by ProcessOne are Copyright 2006-2010, ProcessOne
%%% All Rights Reserved.''
%%% This software is copyright 2006-2010, ProcessOne.
%%%
%%%
%%% @copyright 2006-2010 ProcessOne
%%% @author Christophe Romain <christophe.romain@process-one.net>
%%% [http://www.process-one.net/]
%%% @version {@vsn}, {@date} {@time}
%%% @end
%%% ====================================================================
%%% @doc The module <strong>{@module}</strong> is the default PubSub node tree plugin.
%%% <p>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.</p>
%%% <p>PubSub node tree plugins are using the {@link gen_nodetree} behaviour.</p>
%%% <p><strong>The API isn't stabilized yet</strong>. 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.</p>
-module(nodetree_tree_odbc).
-author('christophe.romain@process-one.net').
-include("pubsub.hrl").
-include("jlib.hrl").
-define(PUBSUB, mod_pubsub_odbc).
-define(PLUGIN_PREFIX, "node_").
-behaviour(gen_pubsub_nodetree).
-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]).
%% ================
%% API definition
%% ================
%% @spec (Host, ServerHost, Opts) -> any()
%% Host = mod_pubsub:host()
%% ServerHost = host()
%% Opts = list()
%% @doc <p>Called during pubsub modules initialisation. Any pubsub plugin must
%% implement this function. It can return anything.</p>
%% <p>This function is mainly used to trigger the setup task necessary for the
%% plugin. It can be used for example by the developer to create the specific
%% module database schema if it does not exists yet.</p>
init(_Host, _ServerHost, _Opts) ->
ok.
terminate(_Host, _ServerHost) ->
ok.
%% @spec () -> [Option]
%% Option = mod_pubsub:nodetreeOption()
%% @doc Returns the default pubsub node tree options.
options() ->
[{virtual_tree, false},
{odbc, true}].
%% @spec (Host, Node, From) -> pubsubNode() | {error, Reason}
%% Host = mod_pubsub:host()
%% Node = mod_pubsub:pubsubNode()
get_node(Host, Node, _From) ->
get_node(Host, Node).
get_node(Host, Node) ->
H = ?PUBSUB:escape(Host),
N = ?PUBSUB:escape(?PUBSUB:node_to_string(Node)),
case catch ejabberd_odbc:sql_query_t(
["select node, parent, type, nodeid "
"from pubsub_node "
"where host='", H, "' and node='", N, "';"])
of
{selected, ["node", "parent", "type", "nodeid"], [RItem]} ->
raw_to_node(Host, RItem);
{'EXIT', _Reason} ->
{error, ?ERR_INTERNAL_SERVER_ERROR};
_ ->
{error, ?ERR_ITEM_NOT_FOUND}
end.
get_node(NodeId) ->
case catch ejabberd_odbc:sql_query_t(
["select host, node, parent, type "
"from pubsub_node "
"where nodeid='", NodeId, "';"])
of
{selected, ["host", "node", "parent", "type"], [{Host, Node, Parent, Type}]} ->
raw_to_node(Host, {Node, Parent, Type, NodeId});
{'EXIT', _Reason} ->
{error, ?ERR_INTERNAL_SERVER_ERROR};
_ ->
{error, ?ERR_ITEM_NOT_FOUND}
end.
%% @spec (Host, From) -> [pubsubNode()] | {error, Reason}
%% Host = mod_pubsub:host() | mod_pubsub:jid()
get_nodes(Host, _From) ->
get_nodes(Host).
get_nodes(Host) ->
H = ?PUBSUB:escape(Host),
case catch ejabberd_odbc:sql_query_t(
["select node, parent, type, nodeid "
"from pubsub_node "
"where host='", H, "';"])
of
{selected, ["node", "parent", "type", "nodeid"], RItems} ->
lists:map(fun(Item) -> raw_to_node(Host, Item) end, RItems);
_ ->
[]
end.
%% @spec (Host, Node, From) -> [{Depth, Record}] | {error, Reason}
%% Host = mod_pubsub:host() | mod_pubsub:jid()
%% Node = mod_pubsub:pubsubNode()
%% From = mod_pubsub:jid()
%% Depth = integer()
%% Record = pubsubNode()
%% @doc <p>Default node tree does not handle parents, return empty list.</p>
get_parentnodes(_Host, _Node, _From) ->
[].
%% @spec (Host, Node, From) -> [{Depth, Record}] | {error, Reason}
%% Host = mod_pubsub:host() | mod_pubsub:jid()
%% Node = mod_pubsub:pubsubNode()
%% From = mod_pubsub:jid()
%% Depth = integer()
%% Record = pubsubNode()
%% @doc <p>Default node tree does not handle parents, return a list
%% containing just this node.</p>
get_parentnodes_tree(Host, Node, From) ->
case get_node(Host, Node, From) of
N when is_record(N, pubsub_node) -> [{0, [N]}];
_Error -> []
end.
get_subnodes(Host, Node, _From) ->
get_subnodes(Host, Node).
%% @spec (Host, Index) -> [pubsubNode()] | {error, Reason}
%% Host = mod_pubsub:host()
%% Node = mod_pubsub:pubsubNode()
get_subnodes(Host, Node) ->
H = ?PUBSUB:escape(Host),
N = ?PUBSUB:escape(?PUBSUB:node_to_string(Node)),
case catch ejabberd_odbc:sql_query_t(
["select node, parent, type, nodeid "
"from pubsub_node "
"where host='", H, "' and parent='", N, "';"])
of
{selected, ["node", "parent", "type", "nodeid"], RItems} ->
lists:map(fun(Item) -> raw_to_node(Host, Item) end, RItems);
_ ->
[]
end.
get_subnodes_tree(Host, Node, _From) ->
get_subnodes_tree(Host, Node).
%% @spec (Host, Index) -> [pubsubNode()] | {error, Reason}
%% Host = mod_pubsub:host()
%% Node = mod_pubsub:pubsubNode()
get_subnodes_tree(Host, Node) ->
H = ?PUBSUB:escape(Host),
N = ?PUBSUB:escape(?PUBSUB:node_to_string(Node)),
case catch ejabberd_odbc:sql_query_t(
["select node, parent, type, nodeid "
"from pubsub_node "
"where host='", H, "' and node like '", N, "%';"])
of
{selected, ["node", "parent", "type", "nodeid"], RItems} ->
lists:map(fun(Item) -> raw_to_node(Host, Item) end, RItems);
_ ->
[]
end.
%% @spec (Host, Node, Type, Owner, Options, Parents) -> ok | {error, Reason}
%% Host = mod_pubsub:host() | mod_pubsub:jid()
%% Node = mod_pubsub:pubsubNode()
%% NodeType = mod_pubsub:nodeType()
%% Owner = mod_pubsub:jid()
%% Options = list()
%% Parents = list()
create_node(Host, Node, Type, Owner, Options, Parents) ->
BJID = jlib:jid_tolower(jlib:jid_remove_resource(Owner)),
case nodeid(Host, Node) of
{error, ?ERR_ITEM_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 nodeid(Host, Parent) of
{result, PNodeId} ->
case nodeowners(PNodeId) 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, NodeId} -> {ok, NodeId};
Other -> Other
end;
false ->
%% Requesting entity is prohibited from creating nodes
{error, ?ERR_FORBIDDEN}
end;
{result, _} ->
%% NodeID already exists
{error, ?ERR_CONFLICT};
Error ->
Error
end.
%% @spec (Host, Node) -> [mod_pubsub:node()]
%% Host = mod_pubsub:host() | mod_pubsub:jid()
%% Node = mod_pubsub:pubsubNode()
delete_node(Host, Node) ->
H = ?PUBSUB:escape(Host),
N = ?PUBSUB:escape(?PUBSUB:node_to_string(Node)),
Removed = get_subnodes_tree(Host, Node),
catch ejabberd_odbc:sql_query_t(
["delete from pubsub_node "
"where host='", H, "' and node like '", N, "%';"]),
Removed.
%% helpers
raw_to_node(Host, {Node, Parent, Type, NodeId}) ->
Options = case catch ejabberd_odbc:sql_query_t(
["select name,val "
"from pubsub_node_option "
"where nodeid='", NodeId, "';"])
of
{selected, ["name", "val"], ROptions} ->
DbOpts = lists:map(fun({Key, Value}) ->
RKey = list_to_atom(Key),
Tokens = element(2, erl_scan:string(Value++".")),
RValue = element(2, erl_parse:parse_term(Tokens)),
{RKey, RValue}
end, ROptions),
Module = list_to_atom(?PLUGIN_PREFIX++Type),
StdOpts = Module:options(),
lists:foldl(fun({Key, Value}, Acc)->
lists:keyreplace(Key, 1, Acc, {Key, Value})
end, StdOpts, DbOpts);
_ ->
[]
end,
#pubsub_node{
nodeid = {Host, ?PUBSUB:string_to_node(Node)},
parents = [?PUBSUB:string_to_node(Parent)],
id = NodeId,
type = Type,
options = Options}.
%% @spec (NodeRecord) -> ok | {error, Reason}
%% Record = mod_pubsub:pubsub_node()
set_node(Record) ->
{Host, Node} = Record#pubsub_node.nodeid,
Parent = case Record#pubsub_node.parents of
[] -> <<>>;
[First|_] -> First
end,
Type = Record#pubsub_node.type,
H = ?PUBSUB:escape(Host),
N = ?PUBSUB:escape(?PUBSUB:node_to_string(Node)),
P = ?PUBSUB:escape(?PUBSUB:node_to_string(Parent)),
NodeId = case nodeid(Host, Node) of
{result, OldNodeId} ->
catch ejabberd_odbc:sql_query_t(
["delete from pubsub_node_option "
"where nodeid='", OldNodeId, "';"]),
catch ejabberd_odbc:sql_query_t(
["update pubsub_node "
"set host='", H, "' "
"node='", N, "' "
"parent='", P, "' "
"type='", Type, "' "
"where nodeid='", OldNodeId, "';"]),
OldNodeId;
_ ->
catch ejabberd_odbc:sql_query_t(
["insert into pubsub_node(host, node, parent, type) "
"values('", H, "', '", N, "', '", P, "', '", Type, "');"]),
case nodeid(Host, Node) of
{result, NewNodeId} -> NewNodeId;
_ -> none % this should not happen
end
end,
case NodeId of
none ->
{error, ?ERR_INTERNAL_SERVER_ERROR};
_ ->
lists:foreach(fun({Key, Value}) ->
SKey = atom_to_list(Key),
SValue = ?PUBSUB:escape(lists:flatten(io_lib:fwrite("~p",[Value]))),
catch ejabberd_odbc:sql_query_t(
["insert into pubsub_node_option(nodeid, name, val) "
"values('", NodeId, "', '", SKey, "', '", SValue, "');"])
end, Record#pubsub_node.options),
{result, NodeId}
end.
nodeid(Host, Node) ->
H = ?PUBSUB:escape(Host),
N = ?PUBSUB:escape(?PUBSUB:node_to_string(Node)),
case catch ejabberd_odbc:sql_query_t(
["select nodeid "
"from pubsub_node "
"where host='", H, "' and node='", N, "';"])
of
{selected, ["nodeid"], [{NodeId}]} ->
{result, NodeId};
{'EXIT', _Reason} ->
{error, ?ERR_INTERNAL_SERVER_ERROR};
_ ->
{error, ?ERR_ITEM_NOT_FOUND}
end.
nodeowners(NodeId) ->
{result, Res} = node_hometree_odbc:get_node_affiliations(NodeId),
lists:foldl(fun({LJID, owner}, Acc) -> [LJID|Acc];
(_, Acc) -> Acc
end, [], Res).
|