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xmpp.chapril.org-ejabberd/src/nodetree_tree_sql.erl

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%%%----------------------------------------------------------------------
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%%% File : nodetree_tree_sql.erl
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%%% Author : Christophe Romain <christophe.romain@process-one.net>
%%% Purpose : Standard node tree plugin with ODBC backend
%%% Created : 1 Dec 2007 by Christophe Romain <christophe.romain@process-one.net>
%%%
%%%
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%%% ejabberd, Copyright (C) 2002-2020 ProcessOne
%%%
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%%% 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.
%%%
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%%% 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 <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
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%%% usable and useful as is. Please, send us comments, feedback and
%%% improvements.</p>
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-module(nodetree_tree_sql).
-behaviour(gen_pubsub_nodetree).
-author('christophe.romain@process-one.net').
-include("pubsub.hrl").
-include_lib("xmpp/include/xmpp.hrl").
-include("ejabberd_sql_pt.hrl").
-include("translate.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() ->
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[{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,
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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 = ?T("Node index not found"),
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{error, xmpp:err_internal_server_error(Txt, ejabberd_option:language())};
_ ->
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) ->
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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(?T("Database failure"), ejabberd_option:language())};
_ ->
{error, xmpp:err_item_not_found(?T("Node not found"), ejabberd_option:language())}
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(?T("Database failure"), ejabberd_option:language())};
_ ->
{error, xmpp:err_item_not_found(?T("Node not found"), ejabberd_option:language())}
end.
get_nodes(Host) ->
get_nodes(Host, infinity).
get_nodes(Host, Limit) ->
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H = node_flat_sql:encode_host(Host),
Query = fun(mssql, _) when is_integer(Limit), Limit>=0 ->
ejabberd_sql:sql_query_t(
?SQL("select top %(Limit)d @(node)s, @(parent)s, @(plugin)s, @(nodeid)d "
"from pubsub_node where host=%(H)s"));
(_, _) when is_integer(Limit), Limit>=0 ->
ejabberd_sql:sql_query_t(
?SQL("select @(node)s, @(parent)s, @(plugin)s, @(nodeid)d "
"from pubsub_node where host=%(H)s limit %(Limit)d"));
(_, _) ->
ejabberd_sql:sql_query_t(
?SQL("select @(node)s, @(parent)s, @(plugin)s, @(nodeid)d "
"from pubsub_node where host=%(H)s"))
end,
case ejabberd_sql:sql_query_t(Query) 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, Limit) ->
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H = node_flat_sql:encode_host(Host),
Query = fun(mssql, _) when is_integer(Limit), Limit>=0 ->
ejabberd_sql:sql_query_t(
?SQL("select top %(Limit)d @(node)s, @(parent)s, @(plugin)s, @(nodeid)d "
"from pubsub_node where host=%(H)s and parent=%(Node)s"));
(_, _) when is_integer(Limit), Limit>=0 ->
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 "
"limit %(Limit)d"));
(_, _) ->
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"))
end,
case ejabberd_sql:sql_query_t(Query) of
{selected, RItems} ->
[raw_to_node(Host, Item) || Item <- RItems];
_ ->
[]
end.
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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(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 ->
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{error, xmpp:err_forbidden()}
end;
{result, _} ->
{error, xmpp:err_conflict(?T("Node already exists"), ejabberd_option:language())};
{error, db_fail} ->
{error, xmpp:err_internal_server_error(?T("Database failure"), ejabberd_option:language())}
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(<<Value/binary, ".">>))),
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) ->
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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) ->
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{result, Res} = node_flat_sql:get_node_affiliations(Nidx),
[LJID || {LJID, Aff} <- Res, Aff =:= owner].