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## Copyright (C) 2018-2020 Philip Nienhuis
##
## 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
## <https://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {} {@var{retval} =} kmzread (@var{fname}, @dots{})
## Read a compressed Google kmz file and return its contents in a struct.
##
## See 'help kmlread' for more information.
##
## @seealso{kmlread}
## @end deftypefn
## Author: Philip Nienhuis <prnienhuis@users.sf.net>
## Created: 2018-05-13
function out = kmzread (fzname, varargin)
## Check filename etc.
[~, fn, ext] = fileparts (fzname);
if (isempty (ext))
ext = ".kmz";
fzname = [fzname ext];
elseif (! strcmp (lower (ext), ".kmz"))
error ("kmzread: filename extension should be '.kmz'");
endif
## Unpack into temp directory
tmpd = tempdir;
fl = unzip (fzname, tempdir);
if (isempty (fl{1}))
## Unzip failed. Check if a previous unzipped doc.kml file exists and wipe it
if (unlink ([tempdir filesep "doc.kml"]) == 0)
## Yep existed, now try again
fl = unzip (fzname, tempdir);
else
error ("kmzread: couldn't unzip %s", fzname);
endif
endif
flname = [tempdir fl{1}];
unwind_protect
## Read file
out = kmlread (flname, varargin{:});
unwind_protect_cleanup
## Delete unpacked file
unlink (flname);
end_unwind_protect
endfunction
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