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-module(ephraim_roster).
-compile([debug_info, export_all]).
-include_lib("exmpp/include/exmpp.hrl").
-record(roster, {
entries :: dict()
}).
-record(avatar, {
data :: binary()
}).
-record(roster_entry, {
name :: binary() | undefined,
subscription :: atom() | undefined,
groups = sets:new() :: set(),
resources = dict:new() :: dict(),
vcard = dict:new() :: dict(),
avatar :: #avatar{} | undefined
}).
-record(resource_entry, {
priority :: integer(),
show :: atom(),
status :: binary()
}).
-spec init() -> ok.
init() ->
loop(#roster{entries=dict:new()}).
-spec updateResource(#roster{}, binary(), integer(), atom(), atom(), binary()) -> #roster{}.
updateResource(Roster, JID, Priority, Type, Show, Status) ->
{Node, Domain, Resource} = exmpp_jid:to_lower(exmpp_jid:parse(JID)),
BareJID = list_to_binary([Node, <<"@">>, Domain]),
RosterEntry = case dict:find(BareJID, Roster#roster.entries) of
{ok, Entry} ->
Entry;
error ->
#roster_entry{}
end,
Resources = case Type of
available ->
ResourceEntry = #resource_entry{priority=Priority,show=Show,status=Status},
dict:store(Resource, ResourceEntry, RosterEntry#roster_entry.resources);
unavailable ->
dict:erase(Resource, RosterEntry#roster_entry.resources);
_ ->
RosterEntry#roster_entry.resources
end,
NewEntry = RosterEntry#roster_entry{resources=Resources},
Entries = dict:store(BareJID, NewEntry, Roster#roster.entries),
uiUpdate(BareJID, NewEntry),
Roster#roster{entries=Entries}.
-spec updateRosterEntry(#roster{}, binary(), binary(), atom(), set()) -> #roster{}.
updateRosterEntry(Roster, JID, Name, Subscription, Groups) ->
OldEntry = case dict:find(JID, Roster#roster.entries) of
{ok, Entry} ->
Entry;
error ->
#roster_entry{}
end,
NewEntry = OldEntry#roster_entry{subscription=Subscription,name=Name,groups=Groups},
Entries = dict:store(JID, NewEntry, Roster#roster.entries),
uiUpdate(JID, NewEntry),
Roster#roster{entries=Entries}.
-spec updateVCard(#roster{}, binary(), dict()) -> #roster{}.
updateVCard(Roster, JID, VCard) ->
OldEntry = case dict:find(JID, Roster#roster.entries) of
{ok, Entry} ->
Entry;
error ->
#roster_entry{}
end,
NewEntry = OldEntry#roster_entry{vcard=VCard},
Entries = dict:store(JID, NewEntry, Roster#roster.entries),
uiUpdate(JID, NewEntry),
Roster#roster{entries=Entries}.
-spec updateAvatar(#roster{}, binary(), binary()) -> #roster{}.
updateAvatar(Roster, JID, Avatar) ->
RosterEntry = case dict:find(JID, Roster#roster.entries) of
{ok, Entry} ->
Entry;
error ->
#roster_entry{}
end,
NewEntry = RosterEntry#roster_entry{avatar=#avatar{data=Avatar}},
Entries = dict:store(JID, NewEntry, Roster#roster.entries),
uiUpdate(JID, NewEntry),
Roster#roster{entries=Entries}.
-spec uiUpdate(binary(), #roster_entry{}) -> ok.
uiUpdate(JID, RosterEntry) ->
if RosterEntry#roster_entry.subscription =:= undefined ->
ok;
true ->
ephraim ! {ui_update, {roster_update, JID, RosterEntry#roster_entry.name, RosterEntry#roster_entry.subscription,
sets:to_list(RosterEntry#roster_entry.groups), dict:to_list(RosterEntry#roster_entry.resources),
RosterEntry#roster_entry.avatar}},
ok
end.
-spec getGroups([#xmlel{}]) -> set().
getGroups(Els) ->
getGroups(sets:new(), Els).
-spec getGroups(set(), [#xmlel{}]) -> set().
getGroups(Groups, []) ->
Groups;
getGroups(Groups, [#xmlel{ns='jabber:iq:roster',name=group,children=[#xmlcdata{cdata=Group}]}|Rest]) ->
getGroups(sets:add_element(Group, Groups), Rest);
getGroups(Groups, [_|Rest]) ->
getGroups(Groups, Rest).
-spec handleRosterIQ(#roster{}, #xmlel{}) -> #roster{}.
handleRosterIQ(Roster, Item) ->
JID = exmpp_xml:get_attribute(Item, jid, undefined),
Name = exmpp_xml:get_attribute(Item, name, undefined),
Groups = getGroups(Item#xmlel.children),
Subscription = binary_to_atom(exmpp_xml:get_attribute(Item, subscription, undefined), utf8),
ephraim ! {send_packet, exmpp_stanza:set_recipient(exmpp_iq:get('jabber:client', #xmlel{ns='vcard-temp',name='vCard'}), JID)},
io:format("ephraim_roster: ~p~n", [exmpp_stanza:set_recipient(exmpp_iq:get('jabber:client', #xmlel{ns='vcard-temp',name='vCard'}), JID)]),
updateRosterEntry(Roster, JID, Name, Subscription, Groups).
-spec handleRosterIQs(#roster{}, [#xmlel{}]) -> #roster{}.
handleRosterIQs(Roster, []) ->
Roster;
handleRosterIQs(Roster, [Item = #xmlel{ns='jabber:iq:roster',name=item}|Rest]) ->
Roster2 = handleRosterIQ(Roster, Item),
handleRosterIQs(Roster2, Rest);
handleRosterIQs(Roster, [_|Rest]) ->
handleRosterIQs(Roster, Rest).
-spec handleVCardIQ(dict(), #xmlel{}) -> dict().
handleVCardIQ(Dict, Item=#xmlel{name=Key}) ->
Value = exmpp_xml:get_cdata(Item),
dict:store(Key, Value, Dict).
-spec handleVCardIQs(dict(), [#xmlel{}]) -> dict().
handleVCardIQs(VCard, []) ->
VCard;
handleVCardIQs(VCard, [Item|Rest]) ->
VCard2 = handleVCardIQ(VCard, Item),
handleVCardIQs(VCard2, Rest).
-spec get_alias(#roster{}, binary()) -> binary().
get_alias(Roster, JID) ->
{Node, Domain, _Resource} = exmpp_jid:to_lower(exmpp_jid:parse(JID)),
BareJID = list_to_binary([Node, <<"@">>, Domain]),
case dict:find(BareJID, Roster#roster.entries) of
{ok, Entry} ->
case Entry#roster_entry.name of
undefined ->
case dict:find('NICKNAME',Entry#roster_entry.vcard) of
{ok, Value} ->
Value;
error ->
Node
end;
Name ->
Name
end;
error ->
Node
end.
-spec loop(#roster{}) -> ok.
loop(Roster) ->
receive
stop ->
ok;
{presence, Packet} ->
From = exmpp_xml:get_attribute(Packet, from, <<"unknown">>),
Priority = exmpp_presence:get_priority(Packet),
Type = exmpp_presence:get_type(Packet),
Show = exmpp_presence:get_show(Packet),
Status = exmpp_presence:get_status(Packet),
Roster2 = updateResource(Roster, From, Priority, Type, Show, Status),
loop(Roster2);
{avatar, From, Avatar} ->
Roster2 = updateAvatar(Roster, From, Avatar),
loop(Roster2);
{roster_iq, Payload} ->
Roster2 = handleRosterIQs(Roster, Payload#xmlel.children),
loop(Roster2);
{vcard_iq, From, Payload} ->
Dict = handleVCardIQs(dict:new(), Payload#xmlel.children),
Roster2 = updateVCard(Roster, From, Dict),
loop(Roster2);
{Pid, get_alias, JID} ->
Pid ! {alias,JID,get_alias(Roster, JID)},
loop(Roster);
Msg ->
io:format("ephraim_roster: ~p~n", [Msg]),
loop(Roster)
end.
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