Add xml compression to sql backend of mam

1 files changed, 958 insertions, 0 deletions

diff --git a/src/xml_compress.erl b/src/xml_compress.erl
new file mode 100644
index 00000000..673b25c1
--- /dev/null
+++ b/src/xml_compress.erl
@@ -0,0 +1,958 @@
+-module(xml_compress).
+-export([encode/3, decode/3]).
+
+% This file was generated by xml_compress_gen
+%
+% Rules used:
+%
+%  [{<<"eu.siacs.conversations.axolotl">>,<<"key">>,
+%    [{<<"prekey">>,[<<"true">>]},{<<"rid">>,[]}],
+%    []},
+%   {<<"jabber:client">>,<<"message">>,
+%    [{<<"from">>,[j2,{j1}]},
+%     {<<"id">>,[]},
+%     {<<"to">>,[j1,j2,{j1}]},
+%     {<<"type">>,[<<"chat">>,<<"groupchat">>,<<"normal">>]},
+%     {<<"xml:lang">>,[<<"en">>]}],
+%    []},
+%   {<<"urn:xmpp:hints">>,<<"store">>,[],[]},
+%   {<<"jabber:client">>,<<"body">>,[],
+%    [<<73,32,115,101,110,116,32,121,111,117,32,97,110,32,79,77,69,77,79,32,101,
+%       110,99,114,121,112,116,101,100,32,109,101,115,115,97,103,101,32,98,117,
+%       116,32,121,111,117,114,32,99,108,105,101,110,116,32,100,111,101,115,110,
+%       226,128,153,116,32,115,101,101,109,32,116,111,32,115,117,112,112,111,
+%       114,116,32,116,104,97,116,46,32,70,105,110,100,32,109,111,114,101,32,
+%       105,110,102,111,114,109,97,116,105,111,110,32,111,110,32,104,116,116,
+%       112,115,58,47,47,99,111,110,118,101,114,115,97,116,105,111,110,115,46,
+%       105,109,47,111,109,101,109,111>>]},
+%   {<<"urn:xmpp:sid:0">>,<<"origin-id">>,[{<<"id">>,[]}],[]},
+%   {<<"urn:xmpp:chat-markers:0">>,<<"markable">>,[],[]},
+%   {<<"eu.siacs.conversations.axolotl">>,<<"encrypted">>,[],[]},
+%   {<<"eu.siacs.conversations.axolotl">>,<<"header">>,[{<<"sid">>,[]}],[]},
+%   {<<"eu.siacs.conversations.axolotl">>,<<"iv">>,[],[]},
+%   {<<"eu.siacs.conversations.axolotl">>,<<"payload">>,[],[]},
+%   {<<"urn:xmpp:eme:0">>,<<"encryption">>,
+%    [{<<"name">>,[<<"OMEMO">>]},
+%     {<<"namespace">>,[<<"eu.siacs.conversations.axolotl">>]}],
+%    []},
+%   {<<"urn:xmpp:delay">>,<<"delay">>,[{<<"from">>,[j1]},{<<"stamp">>,[]}],[]},
+%   {<<"http://jabber.org/protocol/address">>,<<"address">>,
+%    [{<<"jid">>,[{j1}]},{<<"type">>,[<<"ofrom">>]}],
+%    []},
+%   {<<"http://jabber.org/protocol/address">>,<<"addresses">>,[],[]},
+%   {<<"urn:xmpp:chat-markers:0">>,<<"displayed">>,
+%    [{<<"id">>,[]},{<<"sender">>,[{j1},{j2}]}],
+%    []},
+%   {<<"urn:xmpp:mam:tmp">>,<<"archived">>,[{<<"by">>,[]},{<<"id">>,[]}],[]},
+%   {<<"urn:xmpp:sid:0">>,<<"stanza-id">>,[{<<"by">>,[]},{<<"id">>,[]}],[]},
+%   {<<"urn:xmpp:receipts">>,<<"request">>,[],[]},
+%   {<<"urn:xmpp:chat-markers:0">>,<<"received">>,[{<<"id">>,[]}],[]},
+%   {<<"urn:xmpp:receipts">>,<<"received">>,[{<<"id">>,[]}],[]},
+%   {<<"http://jabber.org/protocol/chatstates">>,<<"active">>,[],[]},
+%   {<<"http://jabber.org/protocol/muc#user">>,<<"invite">>,
+%    [{<<"from">>,[{j1}]}],
+%    []},
+%   {<<"http://jabber.org/protocol/muc#user">>,<<"reason">>,[],[]},
+%   {<<"http://jabber.org/protocol/muc#user">>,<<"x">>,[],[]},
+%   {<<"jabber:x:conference">>,<<"x">>,[{<<"jid">>,[j2]}],[]},
+%   {<<"jabber:client">>,<<"subject">>,[],[]},
+%   {<<"jabber:client">>,<<"thread">>,[],[]},
+%   {<<"http://jabber.org/protocol/pubsub#event">>,<<"event">>,[],[]},
+%   {<<"http://jabber.org/protocol/pubsub#event">>,<<"item">>,[{<<"id">>,[]}],[]},
+%   {<<"http://jabber.org/protocol/pubsub#event">>,<<"items">>,
+%    [{<<"node">>,[<<"urn:xmpp:mucsub:nodes:messages">>]}],
+%    []},
+%   {<<"p1:push:custom">>,<<"x">>,[{<<"key">>,[]},{<<"value">>,[]}],[]},
+%   {<<"p1:pushed">>,<<"x">>,[],[]},
+%   {<<"urn:xmpp:message-correct:0">>,<<"replace">>,[{<<"id">>,[]}],[]},
+%   {<<"http://jabber.org/protocol/chatstates">>,<<"composing">>,[],[]}]
+
+encode(El, J1, J2) ->
+  encode_child(El, <<"jabber:client">>,
+    J1, J2, byte_size(J1), byte_size(J2), <<1:8>>).
+
+encode_attr({<<"xmlns">>, _}, Acc) ->
+  Acc;
+encode_attr({N, V}, Acc) ->
+  <<Acc/binary, 1:8, (encode_string(N))/binary,
+    (encode_string(V))/binary>>.
+
+encode_attrs(Attrs, Acc) ->
+  lists:foldl(fun encode_attr/2, Acc, Attrs).
+
+encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  E1 = if
+    PNs == Ns -> encode_attrs(Attrs, <<Pfx/binary, 2:8, (encode_string(Name))/binary>>);
+    true -> encode_attrs(Attrs, <<Pfx/binary, 3:8, (encode_string(Ns))/binary, (encode_string(Name))/binary>>)
+  end,
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E1/binary, 2:8>>),
+  <<E2/binary, 4:8>>.
+
+encode_child({xmlel, Name, Attrs, Children}, PNs, J1, J2, J1L, J2L, Pfx) ->
+  case lists:keyfind(<<"xmlns">>, 1, Attrs) of
+    false ->
+      encode(PNs, PNs, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx);
+    {_, Ns} ->
+      encode(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+  end;
+encode_child({xmlcdata, Data}, _PNs, _J1, _J2, _J1L, _J2L, Pfx) ->
+  <<Pfx/binary, 1:8, (encode_string(Data))/binary>>.
+
+encode_children(Children, PNs, J1, J2, J1L, J2L, Pfx) ->
+  lists:foldl(
+    fun(Child, Acc) ->
+      encode_child(Child, PNs, J1, J2, J1L, J2L, Acc)
+    end, Pfx, Children).
+
+encode_string(Data) ->
+  <<V1:4, V2:6, V3:6>> = <<(byte_size(Data)):16/unsigned-big-integer>>,
+  case {V1, V2, V3} of
+    {0, 0, V3} ->
+      <<V3:8, Data/binary>>;
+    {0, V2, V3} ->
+      <<(V3 bor 64):8, V2:8, Data/binary>>;
+    _ ->
+      <<(V3 bor 64):8, (V2 bor 64):8, V1:8, Data/binary>>
+  end.
+
+encode(PNs, <<"eu.siacs.conversations.axolotl">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"key">> ->
+      E = lists:foldl(fun
+        ({<<"prekey">>, AVal}, Acc) ->
+          case AVal of
+            <<"true">> -> <<Acc/binary, 3:8>>;
+            _ -> <<Acc/binary, 4:8, (encode_string(AVal))/binary>>
+          end;
+        ({<<"rid">>, AVal}, Acc) ->
+          <<Acc/binary, 5:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 5:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"encrypted">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 12:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"header">> ->
+      E = lists:foldl(fun
+        ({<<"sid">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 13:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"iv">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 14:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"payload">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 15:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"jabber:client">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"message">> ->
+      E = lists:foldl(fun
+        ({<<"from">>, AVal}, Acc) ->
+          case AVal of
+            J2 -> <<Acc/binary, 3:8>>;
+            <<J1:J1L/binary, Rest/binary>> -> <<Acc/binary, 4:8, (encode_string(Rest))/binary>>;
+            _ -> <<Acc/binary, 5:8, (encode_string(AVal))/binary>>
+          end;
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 6:8, (encode_string(AVal))/binary>>;
+        ({<<"to">>, AVal}, Acc) ->
+          case AVal of
+            J1 -> <<Acc/binary, 7:8>>;
+            J2 -> <<Acc/binary, 8:8>>;
+            <<J1:J1L/binary, Rest/binary>> -> <<Acc/binary, 9:8, (encode_string(Rest))/binary>>;
+            _ -> <<Acc/binary, 10:8, (encode_string(AVal))/binary>>
+          end;
+        ({<<"type">>, AVal}, Acc) ->
+          case AVal of
+            <<"chat">> -> <<Acc/binary, 11:8>>;
+            <<"groupchat">> -> <<Acc/binary, 12:8>>;
+            <<"normal">> -> <<Acc/binary, 13:8>>;
+            _ -> <<Acc/binary, 14:8, (encode_string(AVal))/binary>>
+          end;
+        ({<<"xml:lang">>, AVal}, Acc) ->
+          case AVal of
+            <<"en">> -> <<Acc/binary, 15:8>>;
+            _ -> <<Acc/binary, 16:8, (encode_string(AVal))/binary>>
+          end;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 6:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"body">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 8:8>>),
+  E2 = lists:foldl(fun
+    ({xmlcdata, <<73,32,115,101,110,116,32,121,111,117,32,97,110,32,79,77,69,
+                  77,79,32,101,110,99,114,121,112,116,101,100,32,109,101,115,
+                  115,97,103,101,32,98,117,116,32,121,111,117,114,32,99,108,
+                  105,101,110,116,32,100,111,101,115,110,226,128,153,116,32,
+                  115,101,101,109,32,116,111,32,115,117,112,112,111,114,116,32,
+                  116,104,97,116,46,32,70,105,110,100,32,109,111,114,101,32,
+                  105,110,102,111,114,109,97,116,105,111,110,32,111,110,32,104,
+                  116,116,112,115,58,47,47,99,111,110,118,101,114,115,97,116,
+                  105,111,110,115,46,105,109,47,111,109,101,109,111>>}, Acc) -> <<Acc/binary, 9:8>>;
+    (El, Acc) -> encode_child(El, Ns, J1, J2, J1L, J2L, Acc)
+  end, <<E/binary, 2:8>>, Children),
+  <<E2/binary, 4:8>>;
+    <<"subject">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 31:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"thread">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 32:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"urn:xmpp:hints">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"store">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 7:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"urn:xmpp:sid:0">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"origin-id">> ->
+      E = lists:foldl(fun
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 10:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"stanza-id">> ->
+      E = lists:foldl(fun
+        ({<<"by">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 4:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 22:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"urn:xmpp:chat-markers:0">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"markable">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 11:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"displayed">> ->
+      E = lists:foldl(fun
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+        ({<<"sender">>, AVal}, Acc) ->
+          case AVal of
+            <<J1:J1L/binary, Rest/binary>> -> <<Acc/binary, 4:8, (encode_string(Rest))/binary>>;
+            <<J2:J2L/binary, Rest/binary>> -> <<Acc/binary, 5:8, (encode_string(Rest))/binary>>;
+            _ -> <<Acc/binary, 6:8, (encode_string(AVal))/binary>>
+          end;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 20:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"received">> ->
+      E = lists:foldl(fun
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 24:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"urn:xmpp:eme:0">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"encryption">> ->
+      E = lists:foldl(fun
+        ({<<"name">>, AVal}, Acc) ->
+          case AVal of
+            <<"OMEMO">> -> <<Acc/binary, 3:8>>;
+            _ -> <<Acc/binary, 4:8, (encode_string(AVal))/binary>>
+          end;
+        ({<<"namespace">>, AVal}, Acc) ->
+          case AVal of
+            <<"eu.siacs.conversations.axolotl">> -> <<Acc/binary, 5:8>>;
+            _ -> <<Acc/binary, 6:8, (encode_string(AVal))/binary>>
+          end;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 16:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"urn:xmpp:delay">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"delay">> ->
+      E = lists:foldl(fun
+        ({<<"from">>, AVal}, Acc) ->
+          case AVal of
+            J1 -> <<Acc/binary, 3:8>>;
+            _ -> <<Acc/binary, 4:8, (encode_string(AVal))/binary>>
+          end;
+        ({<<"stamp">>, AVal}, Acc) ->
+          <<Acc/binary, 5:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 17:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"http://jabber.org/protocol/address">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"address">> ->
+      E = lists:foldl(fun
+        ({<<"jid">>, AVal}, Acc) ->
+          case AVal of
+            <<J1:J1L/binary, Rest/binary>> -> <<Acc/binary, 3:8, (encode_string(Rest))/binary>>;
+            _ -> <<Acc/binary, 4:8, (encode_string(AVal))/binary>>
+          end;
+        ({<<"type">>, AVal}, Acc) ->
+          case AVal of
+            <<"ofrom">> -> <<Acc/binary, 5:8>>;
+            _ -> <<Acc/binary, 6:8, (encode_string(AVal))/binary>>
+          end;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 18:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"addresses">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 19:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"urn:xmpp:mam:tmp">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"archived">> ->
+      E = lists:foldl(fun
+        ({<<"by">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 4:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 21:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"urn:xmpp:receipts">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"request">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 23:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"received">> ->
+      E = lists:foldl(fun
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 25:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"http://jabber.org/protocol/chatstates">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"active">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 26:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"composing">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 39:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"http://jabber.org/protocol/muc#user">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"invite">> ->
+      E = lists:foldl(fun
+        ({<<"from">>, AVal}, Acc) ->
+          case AVal of
+            <<J1:J1L/binary, Rest/binary>> -> <<Acc/binary, 3:8, (encode_string(Rest))/binary>>;
+            _ -> <<Acc/binary, 4:8, (encode_string(AVal))/binary>>
+          end;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 27:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"reason">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 28:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"x">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 29:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"jabber:x:conference">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"x">> ->
+      E = lists:foldl(fun
+        ({<<"jid">>, AVal}, Acc) ->
+          case AVal of
+            J2 -> <<Acc/binary, 3:8>>;
+            _ -> <<Acc/binary, 4:8, (encode_string(AVal))/binary>>
+          end;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 30:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"http://jabber.org/protocol/pubsub#event">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"event">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 33:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"item">> ->
+      E = lists:foldl(fun
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 34:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+    <<"items">> ->
+      E = lists:foldl(fun
+        ({<<"node">>, AVal}, Acc) ->
+          case AVal of
+            <<"urn:xmpp:mucsub:nodes:messages">> -> <<Acc/binary, 3:8>>;
+            _ -> <<Acc/binary, 4:8, (encode_string(AVal))/binary>>
+          end;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 35:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"p1:push:custom">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"x">> ->
+      E = lists:foldl(fun
+        ({<<"key">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+        ({<<"value">>, AVal}, Acc) ->
+          <<Acc/binary, 4:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 36:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"p1:pushed">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"x">> ->
+      E = encode_attrs(Attrs, <<Pfx/binary, 37:8>>),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, <<"urn:xmpp:message-correct:0">> = Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  case Name of
+    <<"replace">> ->
+      E = lists:foldl(fun
+        ({<<"id">>, AVal}, Acc) ->
+          <<Acc/binary, 3:8, (encode_string(AVal))/binary>>;
+    (Attr, Acc) -> encode_attr(Attr, Acc)
+  end, <<Pfx/binary, 38:8>>, Attrs),
+  E2 = encode_children(Children, Ns, J1, J2, J1L, J2L, <<E/binary, 2:8>>),
+  <<E2/binary, 4:8>>;
+  _ -> encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx)
+end;
+encode(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx) ->
+  encode_el(PNs, Ns, Name, Attrs, Children, J1, J2, J1L, J2L, Pfx).
+
+decode(<<$<, _/binary>> = Data, _J1, _J2) ->
+  fxml_stream:parse_element(Data);
+decode(<<1:8, Rest/binary>>, J1, J2) ->
+  {El, _} = decode(Rest, <<"jabber:client">>, J1, J2),
+  El.
+
+decode_string(Data) ->
+  case Data of
+    <<0:2, L:6, Str:L/binary, Rest/binary>> ->
+      {Str, Rest};
+    <<1:2, L1:6, 0:2, L2:6, Rest/binary>> ->
+      L = L2*64 + L1,
+    <<Str:L/binary, Rest2/binary>> = Rest,
+      {Str, Rest2};
+    <<1:2, L1:6, 1:2, L2:6, L3:8, Rest/binary>> ->
+      L = (L3*64 + L2)*64 + L1,
+    <<Str:L/binary, Rest2/binary>> = Rest,
+      {Str, Rest2}
+  end.
+
+decode_child(<<1:8, Rest/binary>>, _PNs, _J1, _J2) ->
+  {Text, Rest2} = decode_string(Rest),
+  {{xmlcdata, Text}, Rest2};
+decode_child(<<2:8, Rest/binary>>, PNs, J1, J2) ->
+  {Name, Rest2} = decode_string(Rest),
+  {Attrs, Rest3} = decode_attrs(Rest2),
+  {Children, Rest4} = decode_children(Rest3, PNs, J1, J2),
+  {{xmlel, Name, Attrs, Children}, Rest4};
+decode_child(<<3:8, Rest/binary>>, PNs, J1, J2) ->
+  {Name, Rest2} = decode_string(Rest),
+  {Ns, Rest3} = decode_string(Rest2),
+  {Attrs, Rest4} = decode_attrs(Rest3),
+  {Children, Rest5} = decode_children(Rest4, Ns, J1, J2),
+  {{xmlel, Name, add_ns(PNs, Ns, Attrs), Children}, Rest5};
+decode_child(<<4:8, Rest/binary>>, _PNs, _J1, _J2) ->
+  {stop, Rest};
+decode_child(Other, PNs, J1, J2) ->
+  decode(Other, PNs, J1, J2).
+
+decode_children(Data, PNs, J1, J2) ->
+  prefix_map(fun(Data2) -> decode(Data2, PNs, J1, J2) end, Data).
+
+decode_attr(<<1:8, Rest/binary>>) ->
+  {Name, Rest2} = decode_string(Rest),
+  {Val, Rest3} = decode_string(Rest2),
+  {{Name, Val}, Rest3};
+decode_attr(<<2:8, Rest/binary>>) ->
+  {stop, Rest}.
+
+decode_attrs(Data) ->
+  prefix_map(fun decode_attr/1, Data).
+
+prefix_map(F, Data) ->
+  prefix_map(F, Data, []).
+
+prefix_map(F, Data, Acc) ->
+  case F(Data) of
+    {stop, Rest} ->
+      {lists:reverse(Acc), Rest};
+    {Val, Rest} ->
+      prefix_map(F, Rest, [Val | Acc])
+  end.
+
+add_ns(Ns, Ns, Attrs) ->
+  Attrs;
+add_ns(_, Ns, Attrs) ->
+  [{<<"xmlns">>, Ns} | Attrs].
+
+decode(<<5:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"eu.siacs.conversations.axolotl">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {{<<"prekey">>, <<"true">>}, Rest3};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"prekey">>, AVal}, Rest4};
+    (<<5:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"rid">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"key">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<12:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"eu.siacs.conversations.axolotl">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"encrypted">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<13:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"eu.siacs.conversations.axolotl">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"sid">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"header">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<14:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"eu.siacs.conversations.axolotl">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"iv">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<15:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"eu.siacs.conversations.axolotl">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"payload">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<6:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"jabber:client">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {{<<"from">>, J2}, Rest3};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"from">>, <<J1/binary, AVal/binary>>}, Rest4};
+    (<<5:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"from">>, AVal}, Rest4};
+    (<<6:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<7:8, Rest3/binary>>) ->
+      {{<<"to">>, J1}, Rest3};
+    (<<8:8, Rest3/binary>>) ->
+      {{<<"to">>, J2}, Rest3};
+    (<<9:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"to">>, <<J1/binary, AVal/binary>>}, Rest4};
+    (<<10:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"to">>, AVal}, Rest4};
+    (<<11:8, Rest3/binary>>) ->
+      {{<<"type">>, <<"chat">>}, Rest3};
+    (<<12:8, Rest3/binary>>) ->
+      {{<<"type">>, <<"groupchat">>}, Rest3};
+    (<<13:8, Rest3/binary>>) ->
+      {{<<"type">>, <<"normal">>}, Rest3};
+    (<<14:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"type">>, AVal}, Rest4};
+    (<<15:8, Rest3/binary>>) ->
+      {{<<"xml:lang">>, <<"en">>}, Rest3};
+    (<<16:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"xml:lang">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"message">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<8:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"jabber:client">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = prefix_map(fun    (<<9:8, Rest5/binary>>) ->
+      {{xmlcdata, <<73,32,115,101,110,116,32,121,111,117,32,97,110,32,79,77,69,
+                    77,79,32,101,110,99,114,121,112,116,101,100,32,109,101,115,
+                    115,97,103,101,32,98,117,116,32,121,111,117,114,32,99,108,
+                    105,101,110,116,32,100,111,101,115,110,226,128,153,116,32,
+                    115,101,101,109,32,116,111,32,115,117,112,112,111,114,116,
+                    32,116,104,97,116,46,32,70,105,110,100,32,109,111,114,101,
+                    32,105,110,102,111,114,109,97,116,105,111,110,32,111,110,
+                    32,104,116,116,112,115,58,47,47,99,111,110,118,101,114,115,
+                    97,116,105,111,110,115,46,105,109,47,111,109,101,109,111>>}, Rest5};
+    (Other) ->
+      decode_child(Other, Ns, J1, J2)
+  end, Rest2),
+  {{xmlel, <<"body">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<31:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"jabber:client">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"subject">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<32:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"jabber:client">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"thread">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<7:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:hints">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"store">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<10:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:sid:0">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"origin-id">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<22:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:sid:0">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"by">>, AVal}, Rest4};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"stanza-id">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<11:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:chat-markers:0">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"markable">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<20:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:chat-markers:0">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"sender">>, <<J1/binary, AVal/binary>>}, Rest4};
+    (<<5:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"sender">>, <<J2/binary, AVal/binary>>}, Rest4};
+    (<<6:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"sender">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"displayed">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<24:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:chat-markers:0">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"received">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<16:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:eme:0">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {{<<"name">>, <<"OMEMO">>}, Rest3};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"name">>, AVal}, Rest4};
+    (<<5:8, Rest3/binary>>) ->
+      {{<<"namespace">>, <<"eu.siacs.conversations.axolotl">>}, Rest3};
+    (<<6:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"namespace">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"encryption">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<17:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:delay">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {{<<"from">>, J1}, Rest3};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"from">>, AVal}, Rest4};
+    (<<5:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"stamp">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"delay">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<18:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/address">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"jid">>, <<J1/binary, AVal/binary>>}, Rest4};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"jid">>, AVal}, Rest4};
+    (<<5:8, Rest3/binary>>) ->
+      {{<<"type">>, <<"ofrom">>}, Rest3};
+    (<<6:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"type">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"address">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<19:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/address">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"addresses">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<21:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:mam:tmp">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"by">>, AVal}, Rest4};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"archived">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<23:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:receipts">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"request">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<25:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:receipts">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"received">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<26:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/chatstates">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"active">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<39:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/chatstates">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"composing">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<27:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/muc#user">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"from">>, <<J1/binary, AVal/binary>>}, Rest4};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"from">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"invite">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<28:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/muc#user">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"reason">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<29:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/muc#user">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"x">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<30:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"jabber:x:conference">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {{<<"jid">>, J2}, Rest3};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"jid">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"x">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<33:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/pubsub#event">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"event">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<34:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/pubsub#event">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"item">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<35:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"http://jabber.org/protocol/pubsub#event">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {{<<"node">>, <<"urn:xmpp:mucsub:nodes:messages">>}, Rest3};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"node">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"items">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<36:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"p1:push:custom">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"key">>, AVal}, Rest4};
+    (<<4:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"value">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"x">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<37:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"p1:pushed">>,
+  {Attrs, Rest2} = decode_attrs(Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"x">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(<<38:8, Rest/binary>>, PNs, J1, J2) ->
+  Ns = <<"urn:xmpp:message-correct:0">>,
+  {Attrs, Rest2} = prefix_map(fun
+    (<<3:8, Rest3/binary>>) ->
+      {AVal, Rest4} = decode_string(Rest3),
+      {{<<"id">>, AVal}, Rest4};
+    (<<2:8, Rest3/binary>>) ->
+      {stop, Rest3};
+    (Data) ->
+      decode_attr(Data)
+  end, Rest),
+  {Children, Rest6} = decode_children(Rest2, Ns, J1, J2),
+  {{xmlel, <<"replace">>, add_ns(PNs, Ns, Attrs), Children}, Rest6};
+decode(Other, PNs, J1, J2) ->
+  decode_child(Other, PNs, J1, J2).
+