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%%% Copyright (c) 2014, NORDUnet A/S.
%%% See LICENSE for licensing information.
%%% @doc Storage node API
-module(storage).
%% API (URL)
-export([sendentry/3, entrycommitted/3, fetchnewentries/3]).
newentries_path() ->
{ok, Value} = application:get_env(plop, newentries_path),
Value.
sendentry(SessionID, _Env, Input) ->
lager:debug("~p", [Input]),
R = (catch case (catch jiffy:decode(Input)) of
{error, E} ->
html("sendentry: bad input:", E);
{PropList} ->
LogEntry = base64:decode(proplists:get_value(<<"entry">>, PropList)),
TreeLeafHash = base64:decode(proplists:get_value(<<"treeleafhash">>, PropList)),
ok = db:add(TreeLeafHash, LogEntry),
ok = index:addlast(newentries_path(), TreeLeafHash),
binary_to_list(
jiffy:encode(
{[{result, <<"ok">>}]}))
end),
lager:debug("result ~p", [R]),
deliver(SessionID, R).
entrycommitted(SessionID, _Env, Input) ->
R = (catch case (catch jiffy:decode(Input)) of
{error, E} ->
html("entrycommitted: bad input:", E);
{PropList} ->
EntryHash = base64:decode(proplists:get_value(<<"entryhash">>, PropList)),
LeafHash = base64:decode(proplists:get_value(<<"treeleafhash">>, PropList)),
ok = db:add_entryhash(LeafHash, EntryHash),
binary_to_list(
jiffy:encode(
{[{result, <<"ok">>}]}))
end),
deliver(SessionID, R).
fetchnewhashes(Index) ->
lists:reverse(fetchnewhashes(Index, [])).
fetchnewhashes(Index, Acc) ->
case index:get(newentries_path(), Index) of
noentry ->
Acc;
Entry ->
fetchnewhashes(Index + 1, [Entry | Acc])
end.
fetchnewentries(SessionID, _Env, _Input) ->
NewHashes = fetchnewhashes(0),
Entries = lists:map(fun(LeafHash) ->
{[{hash, base64:encode(LeafHash)},
{entry, base64:encode(db:entry_for_leafhash(LeafHash))}]}
end, NewHashes),
R = (catch binary_to_list(
jiffy:encode(
{[{result, <<"ok">>}, {entries, Entries}]}))),
deliver(SessionID, R).
%% Private functions.
html(Text, Input) ->
io_lib:format(
"Content-Type: text/html\r\n\r\n" ++
"<html><body><p>~n" ++
"~s~n" ++
"~p~n" ++
"</body></html>~n", [Text, Input]).
-spec deliver(any(), string()) -> ok | {error, _Reason}.
deliver(Session, Data) ->
mod_esi:deliver(Session, Data).
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