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%%%----------------------------------------------------------------------
%%%
%%% ejabberd, Copyright (C) 2002-2026 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.
%%%
%%%----------------------------------------------------------------------
%% -------------------------------
%% Pubsub constants
-define(ERR_EXTENDED(E, C), mod_pubsub:extended_error(E, C)).
%% The actual limit can be configured with mod_pubsub's option max_items_node
-define(MAXITEMS, 1000).
%% this is currently a hard limit.
%% Would be nice to have it configurable.
-define(MAX_PAYLOAD_SIZE, 250000).
%% -------------------------------
%% Pubsub types
-type(hostPubsub() :: binary()).
%% <p><tt>hostPubsub</tt> is the name of the PubSub service. For example, it can be
%% <tt>"pubsub.localhost"</tt>.</p>
-type(hostPEP() :: {binary(), binary(), <<>>}).
%% @type hostPEP() = {User, Server, Resource}
%% User = string()
%% Server = string()
%% Resource = [].
%% <p>For example, it can be :
%% ```{"bob", "example.org", []}'''.</p>
-type(host() :: hostPubsub() | hostPEP()).
%% @type host() = hostPubsub() | hostPEP().
-type(nodeId() :: binary()).
%% @type nodeId() = binary().
%% <p>A node is defined by a list of its ancestors. The last element is the name
%% of the current node. For example:
%% ```<<"/home/localhost/user">>'''</p>
-type(nodeIdx() :: pos_integer() | binary()).
%% @type nodeIdx() = integer() | binary().
%% note: pos_integer() should always be used, but we allow anything else coded
%% as binary, so one can have a custom implementation of nodetree with custom
%% indexing (see nodetree_virtual). this also allows to use any kind of key for
%% indexing nodes, as this can be useful with external backends such as sql.
-type(itemId() :: binary()).
%% @type itemId() = string().
-type(subId() :: binary()).
%% @type subId() = string().
-type(nodeOption() ::
{Option::atom(),
Value::atom() | [binary()] | boolean() | non_neg_integer()
}).
-type(nodeOptions() :: [mod_pubsub:nodeOption(),...]).
%% @type nodeOption() = {Option, Value}
%% Option = atom()
%% Value = term().
%% Example:
%% ```{deliver_payloads, true}'''
-type(subOption() ::
{Option::atom(),
Value::binary() | [binary()] | boolean()
}).
-type(subOptions() :: [mod_pubsub:subOption()]).
-type(pubOption() ::
{Option::binary(),
Values::[binary()]
}).
-type(pubOptions() :: [mod_pubsub:pubOption()]).
-type(affiliation() :: 'none'
| 'owner'
| 'publisher'
| 'publish_only'
| 'member'
| 'outcast'
).
%% @type affiliation() = 'none' | 'owner' | 'publisher' | 'publish-only' | 'member' | 'outcast'.
-type(accessModel() :: 'open'
| 'presence'
| 'roster'
| 'authorize'
| 'whitelist'
).
%% @type accessModel() = 'open' | 'presence' | 'roster' | 'authorize' | 'whitelist'.
-type(publishModel() :: 'publishers'
| 'subscribers'
| 'open'
).
%% @type publishModel() = 'publishers' | 'subscribers' | 'open'
-record(pubsub_index,
{
index :: atom(),
last :: mod_pubsub:nodeIdx(),
free :: [mod_pubsub:nodeIdx()]
}).
-record(pubsub_node,
{
nodeid ,% :: {mod_pubsub:host(), mod_pubsub:nodeId()},
id ,% :: mod_pubsub:nodeIdx(),
parents = [] ,% :: [mod_pubsub:nodeId(),...],
type = <<"flat">>,% :: binary(),
owners = [] ,% :: [jid:ljid(),...],
options = [] % :: mod_pubsub:nodeOptions()
}).
-record(pubsub_state,
{
stateid ,% :: {jid:ljid(), mod_pubsub:nodeIdx()},
nodeidx ,% :: mod_pubsub:nodeIdx(),
items = [] ,% :: [mod_pubsub:itemId(),...],
affiliation = 'none',% :: mod_pubsub:affiliation(),
subscriptions = [] % :: [{mod_pubsub:subscription(), mod_pubsub:subId()}]
}).
-record(pubsub_item,
{
itemid ,% :: {mod_pubsub:itemId(), mod_pubsub:nodeIdx()},
nodeidx ,% :: mod_pubsub:nodeIdx(),
creation = {unknown, unknown},% :: {erlang:timestamp(), jid:ljid()},
modification = {unknown, unknown},% :: {erlang:timestamp(), jid:ljid()},
payload = [] % :: mod_pubsub:payload()
}).
-record(pubsub_subscription,
{
subid ,% :: mod_pubsub:subId(),
options = [] % :: mod_pubsub:subOptions()
}).
-record(pubsub_last_item,
{
nodeid ,% :: {binary(), mod_pubsub:nodeIdx()},
itemid ,% :: mod_pubsub:itemId(),
creation ,% :: {erlang:timestamp(), jid:ljid()},
payload % :: mod_pubsub:payload()
}).
-record(pubsub_orphan,
{
nodeid ,% :: mod_pubsub:nodeIdx(),
items = [] % :: list()
}).
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