toolbox/misc/str_date.m
function strDate = str_date(s, dateFormat)
% STR_Date: Reformat date string to dd-MMM-yyyy.

% @=============================================================================
% This function is part of the Brainstorm software:
% https://neuroimage.usc.edu/brainstorm
% 
% Copyright (c) University of Southern California & McGill University
% This software is distributed under the terms of the GNU General Public License
% as published by the Free Software Foundation. Further details on the GPLv3
% license can be found at http://www.gnu.org/copyleft/gpl.html.
% 
% FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
% UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
% WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
% MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
% LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
%
% For more information type "brainstorm license" at command prompt.
% =============================================================================@
%
% Authors: Francois Tadel, 2018

% Parse inputs
if (nargin < 2) || isempty(dateFormat)
    dateFormat = [];
end
% Clean string
if ischar(s)
    s = strtrim(strrep(s, char(0), ''));
end
% Check various input formats
try
    if ~isempty(dateFormat) && strcmpi(dateFormat, 'posix')
        strDate = datestr(double(s) ./ 86400 + datenum(1970,1,1,0,0,0), 'dd-mmm-yyyy');
    elseif ~isempty(dateFormat)
        strDate = datestr(datenum(s, dateFormat), 'dd-mmm-yyyy');
    elseif isequal(find(s == '/'), [3 6]) && ((length(s) == 10) || (length(s) == 19))
        strDate = datestr(datenum(s, 'dd/mm/yyyy'), 'dd-mmm-yyyy');
    elseif isequal(find(s == '/'), [3 6]) && ((length(s) == 8) || (length(s) == 17))
        strDate = datestr(datenum(s, 'dd/mm/yy'), 'dd-mmm-yyyy');
    elseif isequal(find(s == '.'), [3 6]) && ((length(s) == 10) || (length(s) == 19))
        strDate = datestr(datenum(s, 'dd.mm.yyyy'), 'dd-mmm-yyyy');
    elseif isequal(find(s == '.'), [3 6]) && ((length(s) == 8) || (length(s) == 17))
        strDate = datestr(datenum(s, 'dd.mm.yy'), 'dd-mmm-yyyy');
    elseif isequal(find(s == '-'), [3 6]) && ((length(s) == 10) || (length(s) == 19))
        strDate = datestr(datenum(s, 'dd-mm-yyyy'), 'dd-mmm-yyyy');
    elseif isequal(find(s == '-'), [3 7]) && (length(s) == 11)
        strDate = datestr(datenum(s, 'dd-mmm-yyyy'), 'dd-mmm-yyyy');
    elseif isequal(find(s == '-'), [5 8]) && ((length(s) == 10) || (length(s) == 19))
        strDate = datestr(datenum(s, 'yyyy-mm-dd'), 'dd-mmm-yyyy');
    else
        strDate = [];
    end
catch
    strDate = [];
end



