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## Copyright (C) 2022 John Donoghue <john.donoghue@ieee.org>
##
## This program 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.
##
## This program 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
## this program; if not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {} {@var{info} =} dicomupdate(@var{fileinfo}, @var{attribute}, @var{value})
## @deftypefnx {} {@var{info} =} dicomupdate(@var{info}, @var{attrinfo})
## Update a dicom struct with new values
##
## @subsubheading Inputs
## @var{info} - dicominfo struct.
##
## @var{attribute} - attribute name to find and change value of.
##
## @var{value} - attribute value to set.
##
## @var{attrinfo} - a table with fields Location and Value for each matched attribute to change.
##
## @subsubheading Outputs
## @var{info} - dicominfo struct.
##
## @subsubheading Examples
## @example
## filename = file_in_loadpath("imdata/rtstruct.dcm");
## info = dicominfo(filename);
##
## % update specific values
## finfo = dicomfind(info, "ROINumber");
## finfo.Value@{1@} = 10;
## info = dicomupdate(info, finfo);
##
## % update all matching
## info = dicomupdate(info, "ROINumber", 100);
##
## @end example
## @end deftypefn
function info = dicomupdate(info, attrname, value=0)
# if attrname is a char, need find positions
if ischar(attrname)
if nargin != 3
error ("Expected value");
endif
attribinfo = dicomfind(info, attrname);
else
attribinfo = attrname;
if nargin != 2
error ("Unexpected value");
endif
if !isfield(attribinfo, "Location") || !isfield(attribinfo, "Value")
error ("Expected struct to contain Location and Value fields");
endif
endif
for idx=1:size(attribinfo.Location, 1)
if size(attribinfo.Location, 1) == 1
loc = attribinfo.Location;
if nargin > 2
val = value;
else
val = attribinfo.Value
endif
else
loc = attribinfo.Location{idx};
if nargin > 2
val = value;
else
val = attribinfo.Value{idx};
endif
endif
# set value in location
info = recurse_set_dicom_struct(info, "", loc, val);
endfor
endfunction
function info = recurse_set_dicom_struct(info, base, name, value)
names = fieldnames(info);
# TODO: rather than recurse till find, we could traverse down the struct
for idx = 1:length(names)
fieldname = names{idx};
fieldval = info.(fieldname);
fieldtype = class(fieldval);
if length(base) == 0
nbase = fieldname;
else
nbase = [base "." fieldname];
endif
if strcmp(fieldtype, "struct")
info.(fieldname) = recurse_set_dicom_struct(fieldval, nbase, name, value);
else
if strcmp(nbase, name)
info.(fieldname) = value;
endif
endif
endfor
endfunction
%!test
%! filename = file_in_loadpath("imdata/rtstruct.dcm");
%! info = dicominfo(filename);
%! finfo = dicomfind(info, "ROINumber");
%! assert(length(finfo.Location),4);
%! assert(length(finfo.Value),4);
%! assert(finfo.Location{1}, 'StructureSetROISequence.Item_1.ROINumber');
%! assert(finfo.Value{1}, 2);
%! finfo.Value{1} = 10;
%! info = dicomupdate(info, finfo);
%! finfo = dicomfind(info, "ROINumber");
%! assert(finfo.Value{1}, 10);
%!test
%! filename = file_in_loadpath("imdata/rtstruct.dcm");
%! info = dicominfo(filename);
%! finfo = dicomfind(info, "ROINumber");
%! assert(length(finfo.Location),4);
%! assert(length(finfo.Value),4);
%! assert(finfo.Location{1}, 'StructureSetROISequence.Item_1.ROINumber');
%! assert(finfo.Value{1}, 2);
%! info = dicomupdate(info, "ROINumber", 100);
%! finfo = dicomfind(info, "ROINumber");
%! assert(finfo.Value{1}, 100);
%! assert(finfo.Value{2}, 100);
%! assert(finfo.Value{3}, 100);
%! assert(finfo.Value{4}, 100);
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