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%%% Copyright (c) 2014-2015, NORDUnet A/S.
%%% See LICENSE for licensing information.
%%% @doc Storage node API
-module(storage).
%% API (URL)
-export([request/3]).
request(post, "ct/storage/sendentry", Input) ->
case (catch mochijson2:decode(Input)) of
{error, E} ->
html("sendentry: bad input:", E);
{struct, PropList} ->
LogEntry = base64:decode(proplists:get_value(<<"entry">>, PropList)),
TreeLeafHash = base64:decode(proplists:get_value(<<"treeleafhash">>, PropList)),
ok = db:add(TreeLeafHash, LogEntry),
ok = storagedb:add(TreeLeafHash),
success({[{result, <<"ok">>}]})
end;
request(post, "ct/storage/entrycommitted", Input) ->
case (catch mochijson2:decode(Input)) of
{error, E} ->
html("entrycommitted: bad input:", E);
{struct, PropList} ->
EntryHash = base64:decode(proplists:get_value(<<"entryhash">>, PropList)),
LeafHash = base64:decode(proplists:get_value(<<"treeleafhash">>, PropList)),
db:add_entryhash(LeafHash, EntryHash),
success({[{result, <<"ok">>}]})
end;
request(get, "ct/storage/fetchnewentries", _Input) ->
{LastIndexOrZero, LastHash} = storagedb:lastverifiednewentry(),
LastVerifiedAndNewHashes = storagedb:fetchnewhashes(LastIndexOrZero),
NewHashes = case {LastHash, LastVerifiedAndNewHashes} of
{none, LastVerifiedAndNewHashes} ->
LastVerifiedAndNewHashes;
{Hash1, [Hash2|Rest]} when Hash1 == Hash2 ->
Rest;
_ ->
exit({internalerror, "Incorrect lastverifiedentry"})
end,
Entries = lists:map(fun(LeafHash) ->
base64:encode(LeafHash)
end, NewHashes),
success({[{result, <<"ok">>},
{entries, Entries}]});
request(get, "ct/storage/getentry", Query) ->
Hashes = [base64:decode(Value) || {Key, Value} <- Query, Key == "hash"],
Entries = lists:map(fun(LeafHash) ->
{[{hash, base64:encode(LeafHash)},
{entry, base64:encode(case db:entry_for_leafhash(LeafHash) of
noentry ->
<<>>;
Entry ->
Entry
end)}]}
end, Hashes),
success({[{result, <<"ok">>},
{entries, Entries}]}).
%% Private functions.
html(Text, Input) ->
{400, [{"Content-Type", "text/html"}],
io_lib:format(
"<html><body><p>~n" ++
"~s~n" ++
"~p~n" ++
"</body></html>~n", [Text, Input])}.
success(Data) ->
{200, [{"Content-Type", "text/json"}], mochijson2:encode(Data)}.
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