%%%---------------------------------------------------------------------- %%% File : node_flat_sql.erl %%% Author : Christophe Romain %%% Purpose : Standard PubSub node plugin with ODBC backend %%% Created : 1 Dec 2007 by Christophe Romain %%% %%% %%% ejabberd, Copyright (C) 2002-2018 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 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 %%% types.

%%%

PubSub plugin nodes are using the {@link gen_node} behaviour.

-module(node_flat_sql). -behaviour(gen_pubsub_node). -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, features/0, create_node_permission/6, create_node/2, delete_node/1, purge_node/2, subscribe_node/8, unsubscribe_node/4, publish_item/7, delete_item/4, remove_extra_items/3, get_entity_affiliations/2, get_node_affiliations/1, get_affiliation/2, set_affiliation/3, get_entity_subscriptions/2, get_node_subscriptions/1, get_subscriptions/2, set_subscriptions/4, get_pending_nodes/2, get_states/1, get_state/2, set_state/1, get_items/7, get_items/3, get_item/7, get_item/2, set_item/1, get_item_name/3, node_to_path/1, path_to_node/1, get_entity_subscriptions_for_send_last/2, get_last_items/3]). -export([decode_jid/1, encode_jid/1, encode_jid_like/1, decode_affiliation/1, decode_subscriptions/1, encode_affiliation/1, encode_subscriptions/1, encode_host/1, encode_host_like/1]). init(_Host, _ServerHost, _Opts) -> %%pubsub_subscription_sql:init(Host, ServerHost, Opts), ok. terminate(_Host, _ServerHost) -> ok. options() -> [{sql, true}, {rsm, true} | node_flat:options()]. features() -> [<<"rsm">> | node_flat:features()]. create_node_permission(Host, ServerHost, Node, ParentNode, Owner, Access) -> node_flat:create_node_permission(Host, ServerHost, Node, ParentNode, Owner, Access). create_node(Nidx, Owner) -> {_U, _S, _R} = OwnerKey = jid:tolower(jid:remove_resource(Owner)), J = encode_jid(OwnerKey), A = encode_affiliation(owner), S = encode_subscriptions([]), ejabberd_sql:sql_query_t( ?SQL("insert into pubsub_state(" "nodeid, jid, affiliation, subscriptions) " "values (%(Nidx)d, %(J)s, %(A)s, %(S)s)")), {result, {default, broadcast}}. delete_node(Nodes) -> Reply = lists:map( fun(#pubsub_node{id = Nidx} = PubsubNode) -> Subscriptions = case ejabberd_sql:sql_query_t( ?SQL("select @(jid)s, @(subscriptions)s " "from pubsub_state where nodeid=%(Nidx)d")) of {selected, RItems} -> [{decode_jid(SJID), decode_subscriptions(Subs)} || {SJID, Subs} <- RItems]; _ -> [] end, {PubsubNode, Subscriptions} end, Nodes), {result, {default, broadcast, Reply}}. subscribe_node(Nidx, Sender, Subscriber, AccessModel, SendLast, PresenceSubscription, RosterGroup, _Options) -> SubKey = jid:tolower(Subscriber), GenKey = jid:remove_resource(SubKey), Authorized = jid:tolower(jid:remove_resource(Sender)) == GenKey, {Affiliation, Subscriptions} = select_affiliation_subscriptions(Nidx, GenKey, SubKey), Whitelisted = lists:member(Affiliation, [member, publisher, owner]), PendingSubscription = lists:any(fun ({pending, _}) -> true; (_) -> false end, Subscriptions), Owner = Affiliation == owner, if not Authorized -> {error, mod_pubsub:extended_error( xmpp:err_bad_request(), mod_pubsub:err_invalid_jid())}; (Affiliation == outcast) or (Affiliation == publish_only) -> {error, xmpp:err_forbidden()}; PendingSubscription -> {error, mod_pubsub:extended_error( xmpp:err_not_authorized(), mod_pubsub:err_pending_subscription())}; (AccessModel == presence) and (not PresenceSubscription) and (not Owner) -> {error, mod_pubsub:extended_error( xmpp:err_not_authorized(), mod_pubsub:err_presence_subscription_required())}; (AccessModel == roster) and (not RosterGroup) and (not Owner) -> {error, mod_pubsub:extended_error( xmpp:err_not_authorized(), mod_pubsub:err_not_in_roster_group())}; (AccessModel == whitelist) and (not Whitelisted) and (not Owner) -> {error, mod_pubsub:extended_error( xmpp:err_not_allowed(), mod_pubsub:err_closed_node())}; %%MustPay -> %% % Payment is required for a subscription %% {error, ?ERR_PAYMENT_REQUIRED}; %%ForbiddenAnonymous -> %% % Requesting entity is anonymous %% {error, ?ERR_FORBIDDEN}; true -> %%{result, SubId} = pubsub_subscription_sql:subscribe_node(Subscriber, Nidx, Options), {NewSub, SubId} = case Subscriptions of [{subscribed, Id}|_] -> {subscribed, Id}; [] -> Id = pubsub_subscription_sql:make_subid(), Sub = case AccessModel of authorize -> pending; _ -> subscribed end, update_subscription(Nidx, SubKey, [{Sub, Id} | Subscriptions]), {Sub, Id} end, case {NewSub, SendLast} of {subscribed, never} -> {result, {default, subscribed, SubId}}; {subscribed, _} -> {result, {default, subscribed, SubId, send_last}}; {_, _} -> {result, {default, pending, SubId}} end end. unsubscribe_node(Nidx, Sender, Subscriber, SubId) -> SubKey = jid:tolower(Subscriber), GenKey = jid:remove_resource(SubKey), Authorized = jid:tolower(jid:remove_resource(Sender)) == GenKey, {Affiliation, Subscriptions} = select_affiliation_subscriptions(Nidx, SubKey), SubIdExists = case SubId of <<>> -> false; Binary when is_binary(Binary) -> true; _ -> false end, if %% Requesting entity is prohibited from unsubscribing entity not Authorized -> {error, xmpp:err_forbidden()}; %% Entity did not specify SubId %%SubId == "", ?? -> %% {error, ?ERR_EXTENDED(?ERR_BAD_REQUEST, "subid-required")}; %% Invalid subscription identifier %%InvalidSubId -> %% {error, ?ERR_EXTENDED(?ERR_NOT_ACCEPTABLE, "invalid-subid")}; %% Requesting entity is not a subscriber Subscriptions == [] -> {error, mod_pubsub:extended_error( xmpp:err_unexpected_request(), mod_pubsub:err_not_subscribed())}; %% Subid supplied, so use that. SubIdExists -> Sub = first_in_list(fun ({_, S}) when S == SubId -> true; (_) -> false end, Subscriptions), case Sub of {value, S} -> delete_subscription(SubKey, Nidx, S, Affiliation, Subscriptions), {result, default}; false -> {error, mod_pubsub:extended_error( xmpp:err_unexpected_request(), mod_pubsub:err_not_subscribed())} end; %% Asking to remove all subscriptions to the given node SubId == all -> [delete_subscription(SubKey, Nidx, S, Affiliation, Subscriptions) || S <- Subscriptions], {result, default}; %% No subid supplied, but there's only one matching subscription length(Subscriptions) == 1 -> delete_subscription(SubKey, Nidx, hd(Subscriptions), Affiliation, Subscriptions), {result, default}; %% No subid and more than one possible subscription match. true -> {error, mod_pubsub:extended_error( xmpp:err_bad_request(), mod_pubsub:err_subid_required())} end. delete_subscription(SubKey, Nidx, {Subscription, SubId}, Affiliation, Subscriptions) -> NewSubs = Subscriptions -- [{Subscription, SubId}], %%pubsub_subscription_sql:unsubscribe_node(SubKey, Nidx, SubId), case {Affiliation, NewSubs} of {none, []} -> del_state(Nidx, SubKey); _ -> update_subscription(Nidx, SubKey, NewSubs) end. publish_item(Nidx, Publisher, PublishModel, MaxItems, ItemId, Payload, _PubOpts) -> SubKey = jid:tolower(Publisher), GenKey = jid:remove_resource(SubKey), {Affiliation, Subscriptions} = select_affiliation_subscriptions(Nidx, GenKey, SubKey), Subscribed = case PublishModel of subscribers -> node_flat:is_subscribed(Subscriptions); _ -> undefined end, if not ((PublishModel == open) or (PublishModel == publishers) and ((Affiliation == owner) or (Affiliation == publisher) or (Affiliation == publish_only)) or (Subscribed == true)) -> {error, xmpp:err_forbidden()}; true -> if MaxItems > 0 -> Now = p1_time_compat:timestamp(), case get_item(Nidx, ItemId) of {result, #pubsub_item{creation = {_, GenKey}} = OldItem} -> set_item(OldItem#pubsub_item{ modification = {Now, SubKey}, payload = Payload}), {result, {default, broadcast, []}}; {result, _} -> {error, xmpp:err_forbidden()}; _ -> Items = [ItemId | itemids(Nidx, GenKey)], {result, {_NI, OI}} = remove_extra_items(Nidx, MaxItems, Items), set_item(#pubsub_item{ itemid = {ItemId, Nidx}, creation = {Now, GenKey}, modification = {Now, SubKey}, payload = Payload}), {result, {default, broadcast, OI}} end; true -> {result, {default, broadcast, []}} end end. remove_extra_items(_Nidx, unlimited, ItemIds) -> {result, {ItemIds, []}}; remove_extra_items(Nidx, MaxItems, ItemIds) -> NewItems = lists:sublist(ItemIds, MaxItems), OldItems = lists:nthtail(length(NewItems), ItemIds), del_items(Nidx, OldItems), {result, {NewItems, OldItems}}. delete_item(Nidx, Publisher, PublishModel, ItemId) -> SubKey = jid:tolower(Publisher), GenKey = jid:remove_resource(SubKey), {result, Affiliation} = get_affiliation(Nidx, GenKey), Allowed = Affiliation == publisher orelse Affiliation == owner orelse (PublishModel == open andalso case get_item(Nidx, ItemId) of {result, #pubsub_item{creation = {_, GenKey}}} -> true; _ -> false end), if not Allowed -> {error, xmpp:err_forbidden()}; true -> Items = itemids(Nidx, GenKey), case lists:member(ItemId, Items) of true -> case del_item(Nidx, ItemId) of {updated, 1} -> {result, {default, broadcast}}; _ -> {error, xmpp:err_item_not_found()} end; false -> case Affiliation of owner -> case del_item(Nidx, ItemId) of {updated, 1} -> {result, {default, broadcast}}; _ -> {error, xmpp:err_item_not_found()} end; _ -> {error, xmpp:err_forbidden()} end end end. purge_node(Nidx, Owner) -> SubKey = jid:tolower(Owner), GenKey = jid:remove_resource(SubKey), GenState = get_state(Nidx, GenKey), case GenState of #pubsub_state{affiliation = owner} -> {result, States} = get_states(Nidx), lists:foreach(fun (#pubsub_state{items = []}) -> ok; (#pubsub_state{items = Items}) -> del_items(Nidx, Items) end, States), {result, {default, broadcast}}; _ -> {error, xmpp:err_forbidden()} end. get_entity_affiliations(Host, Owner) -> SubKey = jid:tolower(Owner), GenKey = jid:remove_resource(SubKey), H = encode_host(Host), J = encode_jid(GenKey), {result, case ejabberd_sql:sql_query_t( ?SQL("select @(node)s, @(plugin)s, @(i.nodeid)d, @(affiliation)s " "from pubsub_state i, pubsub_node n where " "i.nodeid = n.nodeid and jid=%(J)s and host=%(H)s")) of {selected, RItems} -> [{nodetree_tree_sql:raw_to_node(Host, {N, <<"">>, T, I}), decode_affiliation(A)} || {N, T, I, A} <- RItems]; _ -> [] end}. get_node_affiliations(Nidx) -> {result, case ejabberd_sql:sql_query_t( ?SQL("select @(jid)s, @(affiliation)s from pubsub_state " "where nodeid=%(Nidx)d")) of {selected, RItems} -> [{decode_jid(J), decode_affiliation(A)} || {J, A} <- RItems]; _ -> [] end}. get_affiliation(Nidx, Owner) -> SubKey = jid:tolower(Owner), GenKey = jid:remove_resource(SubKey), J = encode_jid(GenKey), {result, case ejabberd_sql:sql_query_t( ?SQL("select @(affiliation)s from pubsub_state " "where nodeid=%(Nidx)d and jid=%(J)s")) of {selected, [{A}]} -> decode_affiliation(A); _ -> none end}. set_affiliation(Nidx, Owner, Affiliation) -> SubKey = jid:tolower(Owner), GenKey = jid:remove_resource(SubKey), {_, Subscriptions} = select_affiliation_subscriptions(Nidx, GenKey), case {Affiliation, Subscriptions} of {none, []} -> del_state(Nidx, GenKey); _ -> update_affiliation(Nidx, GenKey, Affiliation) end. get_entity_subscriptions(Host, Owner) -> SubKey = jid:tolower(Owner), GenKey = jid:remove_resource(SubKey), H = encode_host(Host), GJ = encode_jid(GenKey), Query = case SubKey of GenKey -> GJLike = <<(encode_jid_like(GenKey))/binary, "/%">>, ?SQL("select @(node)s, @(plugin)s, @(i.nodeid)d, @(jid)s, @(subscriptions)s " "from pubsub_state i, pubsub_node n " "where i.nodeid = n.nodeid and " "(jid=%(GJ)s or jid like %(GJLike)s escape '^') and host=%(H)s"); _ -> SJ = encode_jid(SubKey), ?SQL("select @(node)s, @(plugin)s, @(i.nodeid)d, @(jid)s, @(subscriptions)s " "from pubsub_state i, pubsub_node n " "where i.nodeid = n.nodeid and " "jid in (%(SJ)s, %(GJ)s) and host=%(H)s") end, {result, case ejabberd_sql:sql_query_t(Query) of {selected, RItems} -> lists:foldl( fun({N, T, I, J, S}, Acc) -> Node = nodetree_tree_sql:raw_to_node(Host, {N, <<"">>, T, I}), Jid = decode_jid(J), lists:foldl( fun({Sub, SubId}, Acc2) -> [{Node, Sub, SubId, Jid} | Acc2] end, Acc, decode_subscriptions(S)) end, [], RItems); _ -> [] end}. -spec get_entity_subscriptions_for_send_last(Host :: mod_pubsub:hostPubsub(), Owner :: jid()) -> {result, [{mod_pubsub:pubsubNode(), mod_pubsub:subscription(), mod_pubsub:subId(), ljid()}]}. get_entity_subscriptions_for_send_last(Host, Owner) -> SubKey = jid:tolower(Owner), GenKey = jid:remove_resource(SubKey), H = encode_host(Host), GJ = encode_jid(GenKey), Query = case SubKey of GenKey -> GJLike = <<(encode_jid_like(GenKey))/binary, "/%">>, ?SQL("select @(node)s, @(plugin)s, @(i.nodeid)d, @(jid)s, @(subscriptions)s " "from pubsub_state i, pubsub_node n, pubsub_node_option o " "where i.nodeid = n.nodeid and n.nodeid = o.nodeid and " "name='send_last_published_item' and val='on_sub_and_presence' and " "(jid=%(GJ)s or jid like %(GJLike)s escape '^') and host=%(H)s"); _ -> SJ = encode_jid(SubKey), ?SQL("select @(node)s, @(plugin)s, @(i.nodeid)d, @(jid)s, @(subscriptions)s " "from pubsub_state i, pubsub_node n, pubsub_node_option o " "where i.nodeid = n.nodeid and n.nodeid = o.nodeid and " "name='send_last_published_item' and val='on_sub_and_presence' and " "jid in (%(SJ)s, %(GJ)s) and host=%(H)s") end, {result, case ejabberd_sql:sql_query_t(Query) of {selected, RItems} -> lists:foldl( fun ({N, T, I, J, S}, Acc) -> Node = nodetree_tree_sql:raw_to_node(Host, {N, <<"">>, T, I}), Jid = decode_jid(J), lists:foldl( fun ({Sub, SubId}, Acc2) -> [{Node, Sub, SubId, Jid}| Acc2] end, Acc, decode_subscriptions(S)) end, [], RItems); _ -> [] end}. get_node_subscriptions(Nidx) -> {result, case ejabberd_sql:sql_query_t( ?SQL("select @(jid)s, @(subscriptions)s from pubsub_state " "where nodeid=%(Nidx)d")) of {selected, RItems} -> lists:foldl( fun ({J, S}, Acc) -> Jid = decode_jid(J), lists:foldl( fun ({Sub, SubId}, Acc2) -> [{Jid, Sub, SubId} | Acc2] end, Acc, decode_subscriptions(S)) end, [], RItems); _ -> [] end}. get_subscriptions(Nidx, Owner) -> SubKey = jid:tolower(Owner), J = encode_jid(SubKey), {result, case ejabberd_sql:sql_query_t( ?SQL("select @(subscriptions)s from pubsub_state" " where nodeid=%(Nidx)d and jid=%(J)s")) of {selected, [{S}]} -> decode_subscriptions(S); _ -> [] end}. set_subscriptions(Nidx, Owner, Subscription, SubId) -> SubKey = jid:tolower(Owner), SubState = get_state_without_itemids(Nidx, SubKey), case {SubId, SubState#pubsub_state.subscriptions} of {_, []} -> case Subscription of none -> {error, mod_pubsub:extended_error( xmpp:err_bad_request(), mod_pubsub:err_not_subscribed())}; _ -> new_subscription(Nidx, Owner, Subscription, SubState) end; {<<>>, [{_, SID}]} -> case Subscription of none -> unsub_with_subid(Nidx, SID, SubState); _ -> replace_subscription({Subscription, SID}, SubState) end; {<<>>, [_ | _]} -> {error, mod_pubsub:extended_error( xmpp:err_bad_request(), mod_pubsub:err_subid_required())}; _ -> case Subscription of none -> unsub_with_subid(Nidx, SubId, SubState); _ -> replace_subscription({Subscription, SubId}, SubState) end end. replace_subscription(NewSub, SubState) -> NewSubs = replace_subscription(NewSub, SubState#pubsub_state.subscriptions, []), set_state(SubState#pubsub_state{subscriptions = NewSubs}). replace_subscription(_, [], Acc) -> Acc; replace_subscription({Sub, SubId}, [{_, SubId} | T], Acc) -> replace_subscription({Sub, SubId}, T, [{Sub, SubId} | Acc]). new_subscription(_Nidx, _Owner, Subscription, SubState) -> %%{result, SubId} = pubsub_subscription_sql:subscribe_node(Owner, Nidx, []), SubId = pubsub_subscription_sql:make_subid(), Subscriptions = [{Subscription, SubId} | SubState#pubsub_state.subscriptions], set_state(SubState#pubsub_state{subscriptions = Subscriptions}), {Subscription, SubId}. unsub_with_subid(Nidx, SubId, SubState) -> %%pubsub_subscription_sql:unsubscribe_node(SubState#pubsub_state.stateid, Nidx, SubId), NewSubs = [{S, Sid} || {S, Sid} <- SubState#pubsub_state.subscriptions, SubId =/= Sid], case {NewSubs, SubState#pubsub_state.affiliation} of {[], none} -> del_state(Nidx, element(1, SubState#pubsub_state.stateid)); _ -> set_state(SubState#pubsub_state{subscriptions = NewSubs}) end. get_pending_nodes(Host, Owner) -> GenKey = jid:remove_resource(jid:tolower(Owner)), States = mnesia:match_object(#pubsub_state{stateid = {GenKey, '_'}, affiliation = owner, _ = '_'}), Nidxxs = [Nidx || #pubsub_state{stateid = {_, Nidx}} <- States], NodeTree = mod_pubsub:tree(Host), Reply = mnesia:foldl(fun (#pubsub_state{stateid = {_, Nidx}} = S, Acc) -> case lists:member(Nidx, Nidxxs) of true -> case get_nodes_helper(NodeTree, S) of {value, Node} -> [Node | Acc]; false -> Acc end; false -> Acc end end, [], pubsub_state), {result, Reply}. get_nodes_helper(NodeTree, #pubsub_state{stateid = {_, N}, subscriptions = Subs}) -> HasPending = fun ({pending, _}) -> true; (pending) -> true; (_) -> false end, case lists:any(HasPending, Subs) of true -> case NodeTree:get_node(N) of #pubsub_node{nodeid = {_, Node}} -> {value, Node}; _ -> false end; false -> false end. get_states(Nidx) -> case ejabberd_sql:sql_query_t( ?SQL("select @(jid)s, @(affiliation)s, @(subscriptions)s " "from pubsub_state where nodeid=%(Nidx)d")) of {selected, RItems} -> {result, lists:map( fun({SJID, Aff, Subs}) -> JID = decode_jid(SJID), #pubsub_state{stateid = {JID, Nidx}, nodeidx = Nidx, items = itemids(Nidx, JID), affiliation = decode_affiliation(Aff), subscriptions = decode_subscriptions(Subs)} end, RItems)}; _ -> {result, []} end. get_state(Nidx, JID) -> State = get_state_without_itemids(Nidx, JID), {SJID, _} = State#pubsub_state.stateid, State#pubsub_state{items = itemids(Nidx, SJID)}. -spec get_state_without_itemids(Nidx :: mod_pubsub:nodeIdx(), Key :: ljid()) -> mod_pubsub:pubsubState(). get_state_without_itemids(Nidx, JID) -> J = encode_jid(JID), case ejabberd_sql:sql_query_t( ?SQL("select @(jid)s, @(affiliation)s, @(subscriptions)s " "from pubsub_state " "where nodeid=%(Nidx)d and jid=%(J)s")) of {selected, [{SJID, Aff, Subs}]} -> #pubsub_state{stateid = {decode_jid(SJID), Nidx}, nodeidx = Nidx, affiliation = decode_affiliation(Aff), subscriptions = decode_subscriptions(Subs)}; _ -> #pubsub_state{stateid = {JID, Nidx}, nodeidx = Nidx} end. set_state(State) -> {_, Nidx} = State#pubsub_state.stateid, set_state(Nidx, State). set_state(Nidx, State) -> {JID, _} = State#pubsub_state.stateid, J = encode_jid(JID), S = encode_subscriptions(State#pubsub_state.subscriptions), A = encode_affiliation(State#pubsub_state.affiliation), ?SQL_UPSERT_T( "pubsub_state", ["!nodeid=%(Nidx)d", "!jid=%(J)s", "affiliation=%(A)s", "subscriptions=%(S)s" ]), ok. del_state(Nidx, JID) -> J = encode_jid(JID), catch ejabberd_sql:sql_query_t( ?SQL("delete from pubsub_state" " where jid=%(J)s and nodeid=%(Nidx)d")), ok. get_items(Nidx, _From, undefined) -> SNidx = misc:i2l(Nidx), case ejabberd_sql:sql_query_t( [<<"select itemid, publisher, creation, modification, payload", " from pubsub_item where nodeid='", SNidx/binary, "'", " order by creation asc">>]) of {selected, _, AllItems} -> {result, {[raw_to_item(Nidx, RItem) || RItem <- AllItems], undefined}}; _ -> {result, {[], undefined}} end; get_items(Nidx, _From, #rsm_set{max = Max, index = IncIndex, 'after' = After, before = Before}) -> Count = case catch ejabberd_sql:sql_query_t( ?SQL("select @(count(itemid))d from pubsub_item" " where nodeid=%(Nidx)d")) of {selected, [{C}]} -> C; _ -> 0 end, Offset = case {IncIndex, Before, After} of {I, undefined, undefined} when is_integer(I) -> I; _ -> 0 end, Limit = case Max of undefined -> ?MAXITEMS; _ -> Max end, Filters = rsm_filters(misc:i2l(Nidx), Before, After), Query = fun(mssql, _) -> ejabberd_sql:sql_query_t( [<<"select top ", (integer_to_binary(Limit))/binary, " itemid, publisher, creation, modification, payload", " from pubsub_item", Filters/binary>>]); %OFFSET 10 ROWS FETCH NEXT 10 ROWS ONLY; (_, _) -> ejabberd_sql:sql_query_t( [<<"select itemid, publisher, creation, modification, payload", " from pubsub_item", Filters/binary, " limit ", (integer_to_binary(Limit))/binary, " offset ", (integer_to_binary(Offset))/binary>>]) end, case ejabberd_sql:sql_query_t(Query) of {selected, _, []} -> {result, {[], #rsm_set{count = Count}}}; {selected, [<<"itemid">>, <<"publisher">>, <<"creation">>, <<"modification">>, <<"payload">>], RItems} -> Rsm = rsm_page(Count, IncIndex, Offset, RItems), {result, {[raw_to_item(Nidx, RItem) || RItem <- RItems], Rsm}}; _ -> {result, {[], undefined}} end. get_items(Nidx, JID, AccessModel, PresenceSubscription, RosterGroup, _SubId, RSM) -> SubKey = jid:tolower(JID), GenKey = jid:remove_resource(SubKey), {Affiliation, Subscriptions} = select_affiliation_subscriptions(Nidx, GenKey, SubKey), Whitelisted = node_flat:can_fetch_item(Affiliation, Subscriptions), if %%SubId == "", ?? -> %% Entity has multiple subscriptions to the node but does not specify a subscription ID %{error, ?ERR_EXTENDED(?ERR_BAD_REQUEST, "subid-required")}; %%InvalidSubId -> %% Entity is subscribed but specifies an invalid subscription ID %{error, ?ERR_EXTENDED(?ERR_NOT_ACCEPTABLE, "invalid-subid")}; (Affiliation == outcast) or (Affiliation == publish_only) -> {error, xmpp:err_forbidden()}; (AccessModel == presence) and not PresenceSubscription -> {error, mod_pubsub:extended_error( xmpp:err_not_authorized(), mod_pubsub:err_presence_subscription_required())}; (AccessModel == roster) and not RosterGroup -> {error, mod_pubsub:extended_error( xmpp:err_not_authorized(), mod_pubsub:err_not_in_roster_group())}; (AccessModel == whitelist) and not Whitelisted -> {error, mod_pubsub:extended_error( xmpp:err_not_allowed(), mod_pubsub:err_closed_node())}; (AccessModel == authorize) and not Whitelisted -> {error, xmpp:err_forbidden()}; %%MustPay -> %% % Payment is required for a subscription %% {error, ?ERR_PAYMENT_REQUIRED}; true -> get_items(Nidx, JID, RSM) end. get_last_items(Nidx, _From, Limit) -> SNidx = misc:i2l(Nidx), Query = fun(mssql, _) -> ejabberd_sql:sql_query_t( [<<"select top ", (integer_to_binary(Limit))/binary, " itemid, publisher, creation, modification, payload", " from pubsub_item where nodeid='", SNidx/binary, "' order by modification desc">>]); (_, _) -> ejabberd_sql:sql_query_t( [<<"select itemid, publisher, creation, modification, payload", " from pubsub_item where nodeid='", SNidx/binary, "' order by modification desc ", " limit ", (integer_to_binary(Limit))/binary>>]) end, case catch ejabberd_sql:sql_query_t(Query) of {selected, [<<"itemid">>, <<"publisher">>, <<"creation">>, <<"modification">>, <<"payload">>], RItems} -> {result, [raw_to_item(Nidx, RItem) || RItem <- RItems]}; _ -> {result, []} end. get_item(Nidx, ItemId) -> case catch ejabberd_sql:sql_query_t( ?SQL("select @(itemid)s, @(publisher)s, @(creation)s," " @(modification)s, @(payload)s from pubsub_item" " where nodeid=%(Nidx)d and itemid=%(ItemId)s")) of {selected, [RItem]} -> {result, raw_to_item(Nidx, RItem)}; {selected, []} -> {error, xmpp:err_item_not_found()}; {'EXIT', _} -> {error, xmpp:err_internal_server_error(<<"Database failure">>, ?MYLANG)} end. get_item(Nidx, ItemId, JID, AccessModel, PresenceSubscription, RosterGroup, _SubId) -> SubKey = jid:tolower(JID), GenKey = jid:remove_resource(SubKey), {Affiliation, Subscriptions} = select_affiliation_subscriptions(Nidx, GenKey, SubKey), Whitelisted = node_flat:can_fetch_item(Affiliation, Subscriptions), if %%SubId == "", ?? -> %% Entity has multiple subscriptions to the node but does not specify a subscription ID %{error, ?ERR_EXTENDED(?ERR_BAD_REQUEST, "subid-required")}; %%InvalidSubId -> %% Entity is subscribed but specifies an invalid subscription ID %{error, ?ERR_EXTENDED(?ERR_NOT_ACCEPTABLE, "invalid-subid")}; (Affiliation == outcast) or (Affiliation == publish_only) -> {error, xmpp:err_forbidden()}; (AccessModel == presence) and not PresenceSubscription -> {error, mod_pubsub:extended_error( xmpp:err_not_authorized(), mod_pubsub:err_presence_subscription_required())}; (AccessModel == roster) and not RosterGroup -> {error, mod_pubsub:extended_error( xmpp:err_not_authorized(), mod_pubsub:err_not_in_roster_group())}; (AccessModel == whitelist) and not Whitelisted -> {error, mod_pubsub:extended_error( xmpp:err_not_allowed(), mod_pubsub:err_closed_node())}; (AccessModel == authorize) and not Whitelisted -> {error, xmpp:err_forbidden()}; %%MustPay -> %% % Payment is required for a subscription %% {error, ?ERR_PAYMENT_REQUIRED}; true -> get_item(Nidx, ItemId) end. set_item(Item) -> {ItemId, Nidx} = Item#pubsub_item.itemid, {C, _} = Item#pubsub_item.creation, {M, JID} = Item#pubsub_item.modification, P = encode_jid(JID), Payload = Item#pubsub_item.payload, XML = str:join([fxml:element_to_binary(X) || X<-Payload], <<>>), SM = encode_now(M), SC = encode_now(C), ?SQL_UPSERT_T( "pubsub_item", ["!nodeid=%(Nidx)d", "!itemid=%(ItemId)s", "publisher=%(P)s", "modification=%(SM)s", "payload=%(XML)s", "-creation=%(SC)s" ]), ok. del_item(Nidx, ItemId) -> catch ejabberd_sql:sql_query_t( ?SQL("delete from pubsub_item where itemid=%(ItemId)s" " and nodeid=%(Nidx)d")). del_items(_, []) -> ok; del_items(Nidx, [ItemId]) -> del_item(Nidx, ItemId); del_items(Nidx, ItemIds) -> I = str:join([[<<"'">>, ejabberd_sql:escape(X), <<"'">>] || X <- ItemIds], <<",">>), SNidx = misc:i2l(Nidx), catch ejabberd_sql:sql_query_t([<<"delete from pubsub_item where itemid in (">>, I, <<") and nodeid='">>, SNidx, <<"';">>]). get_item_name(_Host, _Node, Id) -> Id. node_to_path(Node) -> node_flat:node_to_path(Node). path_to_node(Path) -> node_flat:path_to_node(Path). first_in_list(_Pred, []) -> false; first_in_list(Pred, [H | T]) -> case Pred(H) of true -> {value, H}; _ -> first_in_list(Pred, T) end. itemids(Nidx, {_U, _S, _R} = JID) -> SJID = encode_jid(JID), SJIDLike = <<(encode_jid_like(JID))/binary, "/%">>, case catch ejabberd_sql:sql_query_t( ?SQL("select @(itemid)s from pubsub_item where " "nodeid=%(Nidx)d and (publisher=%(SJID)s" " or publisher like %(SJIDLike)s escape '^') " "order by modification desc")) of {selected, RItems} -> [ItemId || {ItemId} <- RItems]; _ -> [] end. select_affiliation_subscriptions(Nidx, JID) -> J = encode_jid(JID), case catch ejabberd_sql:sql_query_t( ?SQL("select @(affiliation)s, @(subscriptions)s from " " pubsub_state where nodeid=%(Nidx)d and jid=%(J)s")) of {selected, [{A, S}]} -> {decode_affiliation(A), decode_subscriptions(S)}; _ -> {none, []} end. select_affiliation_subscriptions(Nidx, JID, JID) -> select_affiliation_subscriptions(Nidx, JID); select_affiliation_subscriptions(Nidx, GenKey, SubKey) -> {result, Affiliation} = get_affiliation(Nidx, GenKey), {result, BareJidSubs} = get_subscriptions(Nidx, GenKey), {result, FullJidSubs} = get_subscriptions(Nidx, SubKey), {Affiliation, BareJidSubs++FullJidSubs}. update_affiliation(Nidx, JID, Affiliation) -> J = encode_jid(JID), A = encode_affiliation(Affiliation), ?SQL_UPSERT_T( "pubsub_state", ["!nodeid=%(Nidx)d", "!jid=%(J)s", "affiliation=%(A)s", "-subscriptions=''" ]). update_subscription(Nidx, JID, Subscription) -> J = encode_jid(JID), S = encode_subscriptions(Subscription), ?SQL_UPSERT_T( "pubsub_state", ["!nodeid=%(Nidx)d", "!jid=%(J)s", "subscriptions=%(S)s", "-affiliation='n'" ]). -spec decode_jid(SJID :: binary()) -> ljid(). decode_jid(SJID) -> jid:tolower(jid:decode(SJID)). -spec decode_affiliation(Arg :: binary()) -> atom(). decode_affiliation(<<"o">>) -> owner; decode_affiliation(<<"p">>) -> publisher; decode_affiliation(<<"u">>) -> publish_only; decode_affiliation(<<"m">>) -> member; decode_affiliation(<<"c">>) -> outcast; decode_affiliation(_) -> none. -spec decode_subscription(Arg :: binary()) -> atom(). decode_subscription(<<"s">>) -> subscribed; decode_subscription(<<"p">>) -> pending; decode_subscription(<<"u">>) -> unconfigured; decode_subscription(_) -> none. -spec decode_subscriptions(Subscriptions :: binary()) -> [] | [{atom(), binary()},...]. decode_subscriptions(Subscriptions) -> lists:foldl(fun (Subscription, Acc) -> case str:tokens(Subscription, <<":">>) of [S, SubId] -> [{decode_subscription(S), SubId} | Acc]; _ -> Acc end end, [], str:tokens(Subscriptions, <<",">>)). -spec encode_jid(JID :: ljid()) -> binary(). encode_jid(JID) -> jid:encode(JID). -spec encode_jid_like(JID :: ljid()) -> binary(). encode_jid_like(JID) -> ejabberd_sql:escape_like_arg_circumflex(jid:encode(JID)). -spec encode_host(Host :: host()) -> binary(). encode_host({_U, _S, _R} = LJID) -> encode_jid(LJID); encode_host(Host) -> Host. -spec encode_host_like(Host :: host()) -> binary(). encode_host_like({_U, _S, _R} = LJID) -> ejabberd_sql:escape(encode_jid_like(LJID)); encode_host_like(Host) -> ejabberd_sql:escape(ejabberd_sql:escape_like_arg_circumflex(Host)). -spec encode_affiliation(Arg :: atom()) -> binary(). encode_affiliation(owner) -> <<"o">>; encode_affiliation(publisher) -> <<"p">>; encode_affiliation(publish_only) -> <<"u">>; encode_affiliation(member) -> <<"m">>; encode_affiliation(outcast) -> <<"c">>; encode_affiliation(_) -> <<"n">>. -spec encode_subscription(Arg :: atom()) -> binary(). encode_subscription(subscribed) -> <<"s">>; encode_subscription(pending) -> <<"p">>; encode_subscription(unconfigured) -> <<"u">>; encode_subscription(_) -> <<"n">>. -spec encode_subscriptions(Subscriptions :: [] | [{atom(), binary()},...]) -> binary(). encode_subscriptions(Subscriptions) -> str:join([<<(encode_subscription(S))/binary, ":", SubId/binary>> || {S, SubId} <- Subscriptions], <<",">>). %%% record getter/setter raw_to_item(Nidx, [ItemId, SJID, Creation, Modification, XML]) -> raw_to_item(Nidx, {ItemId, SJID, Creation, Modification, XML}); raw_to_item(Nidx, {ItemId, SJID, Creation, Modification, XML}) -> JID = decode_jid(SJID), Payload = case fxml_stream:parse_element(XML) of {error, _Reason} -> []; El -> [El] end, #pubsub_item{itemid = {ItemId, Nidx}, nodeidx = Nidx, creation = {decode_now(Creation), jid:remove_resource(JID)}, modification = {decode_now(Modification), JID}, payload = Payload}. rsm_filters(SNidx, undefined, undefined) -> <<" where nodeid='", SNidx/binary, "'", " order by creation asc">>; rsm_filters(SNidx, undefined, After) -> <<" where nodeid='", SNidx/binary, "'", " and creation>'", (encode_stamp(After))/binary, "'", " order by creation asc">>; rsm_filters(SNidx, <<>>, undefined) -> %% 2.5 Requesting the Last Page in a Result Set <<" where nodeid='", SNidx/binary, "'", " order by creation desc">>; rsm_filters(SNidx, Before, undefined) -> <<" where nodeid='", SNidx/binary, "'", " and creation<'", (encode_stamp(Before))/binary, "'", " order by creation desc">>. rsm_page(Count, Index, Offset, Items) -> First = decode_stamp(lists:nth(3, hd(Items))), Last = decode_stamp(lists:nth(3, lists:last(Items))), #rsm_set{count = Count, index = Index, first = #rsm_first{index = Offset, data = First}, last = Last}. encode_stamp(Stamp) -> case catch xmpp_util:decode_timestamp(Stamp) of {MS,S,US} -> encode_now({MS,S,US}); _ -> Stamp end. decode_stamp(Stamp) -> case catch xmpp_util:encode_timestamp(decode_now(Stamp)) of TimeStamp when is_binary(TimeStamp) -> TimeStamp; _ -> Stamp end. encode_now({T1, T2, T3}) -> <<(misc:i2l(T1, 6))/binary, ":", (misc:i2l(T2, 6))/binary, ":", (misc:i2l(T3, 6))/binary>>. decode_now(NowStr) -> [MS, S, US] = binary:split(NowStr, <<":">>, [global]), {binary_to_integer(MS), binary_to_integer(S), binary_to_integer(US)}.