function [hasLicense] = user_has_matlab_license(toolbox)
%[hasLicense] = user_has_matlab_license(toolbox)
% checks for license using the appropriate function call
%
% INPUTS
%   toolbox: string for toolbox name
%
% OUTPUTS
%   hasLicense: bool indicating whether or not the user has the license
%
% SPECIAL REQUIREMENTS
%   none

% Copyright © 2012-2020 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/>.

[hasLicense, ~] = license('checkout',toolbox);

if ~hasLicense
    return
end
switch toolbox
    %use function unique to toolbox
  case 'statistics_toolbox'
    n = 'gppdf';
  case 'optimization_toolbox'
    n='fsolve';
  case 'GADS_Toolbox'
    n='simulannealbnd';
  case 'control_toolbox'
    n='dlyap';
end
hasInstallation=check_toolbox_installation(n);
if ~hasInstallation
    hasLicense=0;
    return
end
end

function hasInstallation=check_toolbox_installation(n)
if isempty(n)
    hasInstallation=0;
else
    %follows description in ver-help
    pat = '(?<=^.+[\\/]toolbox[\\/])[^\\/]+';
    ver_string=regexp(which(n), pat, 'match', 'once');
    a=ver(ver_string);
    if isempty(a)
        hasInstallation=0;
    else
        hasInstallation=1;
    end
end
end