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% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.
-module(mango_fdb_special).
-include_lib("couch/include/couch_db.hrl").
-include("mango_cursor.hrl").
-export([
query/4
]).
query(Db, CallBack, Cursor, Args) ->
Acc = #{
cursor => Cursor,
callback => CallBack
},
Opts = args_to_fdb_opts(Args),
{ok, Acc1} = fabric2_db:fold_docs(Db, fun fold_cb/2, Acc, Opts),
{ok, maps:get(cursor, Acc1)}.
args_to_fdb_opts(Args) ->
#{
start_key := StartKey,
end_key := EndKey
} = Args,
mango_fdb:base_fold_opts(Args)
++ [{include_docs, true}]
++ start_key_opts(StartKey)
++ end_key_opts(EndKey).
start_key_opts(StartKey) ->
[{start_key, fabric2_util:encode_all_doc_key(StartKey)}].
end_key_opts(?MAX_STR) ->
[];
end_key_opts(EndKey) ->
[{end_key, fabric2_util:encode_all_doc_key(EndKey)}].
fold_cb({row, Props}, Acc) ->
#{
cursor := Cursor,
callback := Callback
} = Acc,
case is_design_doc(Props) of
true ->
{ok, Acc};
false ->
Doc = couch_util:get_value(doc, Props),
Key = couch_util:get_value(key, Props),
{Go, Cursor1} = Callback({doc, Key, Doc}, Cursor),
{Go, Acc#{cursor := Cursor1}}
end;
fold_cb(Message, Acc) ->
#{
cursor := Cursor,
callback := Callback
} = Acc,
{Go, Cursor1} = Callback(Message, Cursor),
{Go, Acc#{cursor := Cursor1}}.
is_design_doc(RowProps) ->
case couch_util:get_value(id, RowProps) of
<<"_design/", _/binary>> -> true;
_ -> false
end.
|
