function b = isolder(f, F)

% Returns true if f is older than any file in folder (and subfolders) F.
%
% INPUTS
% - f   [string]  file name
% - F   [string]  folder name
%
% OUTPUT
% - b   [logical]

% Copyright © 2015-2023 Dynare Team
%
% This file is part of Dynare.
%
% Dynare is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% Dynare is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with Dynare.  If not, see <https://www.gnu.org/licenses/>.

if nargin<2 || isempty(F)
    F = pwd();
end

b = true;

files = dir(F);
tfile = dir(f);
tdate = tfile.datenum;

for i=1:length(files)
    if isequal(files(i).name, '.') || isequal(files(i).name, '..')
        continue
    end
    if isequal(files(i).name, f)
        continue
    end
    if files(i).isdir
        b = isolder(f, files(i).name);
        if ~b
            return
        end
        continue
    end
    b = tdate<files(i).datenum;
    if ~b
        return
    end
end

return % --*-- Unit tests --*--

%@test:1
t = false(3,1);
mkdir toto;
cd toto
mkdir titi;
mkdir tata;
cd tata
mkdir tutu;
cd tutu
system('touch a.m');
cd ..
system('touch b.m');
system('touch c.m');
cd ../titi
system('touch d.m');
cd ..
pause(1)
system('touch e.m');
t(1) = isequal(isolder('e.m'), false);
pause(1)
system('touch tata/tutu/a.m');
system('touch tata/b.m');
system('touch tata/c.m');
system('touch titi/d.m');
t(2) = isequal(isolder('e.m'), true);
pause(1)
system('touch e.m');
t(3) = isequal(isolder('e.m'), false);
cd ..
if isoctave()
    confirm_recursive_rmdir(false, 'local');
end
rmdir('toto','s');
T = all(t);
%@eof:1