%============================================================================
% Copyright (C) 2014, Heikki Hyyti
%
% Permission is hereby granted, free of charge, to any person obtaining a
% copy of this software and associated documentation files (the "Software"),
% to deal in the Software without restriction, including without limitation
% the rights to use, copy, modify, merge, publish, distribute, sublicense,
% and/or sell copies of the Software, and to permit persons to whom the
% Software is furnished to do so, subject to the following conditions:
%
% The above copyright notice and this permission notice shall be included in
% all copies or substantial portions of the Software.
%
% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
% THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
% FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
% DEALINGS IN THE SOFTWARE.
%============================================================================
%
% calibration = loadMAPFile(filename)
%
% Description:
%    Loads UTM zone and Map corner coordinates in WGS84 from calibration
%    file (map) generated by fetch_map python script.
%
% Input:
%    filename: Filename of calibration file (got using fetch_map python script).
%
% Output:
%    calibration: Calibration data (currently only utmzone and MMPLL params).
%
function calibration = loadMAPFile(filename)
    fileID = fopen(filename);
    
    calibration = struct('utmzone', [], 'MMPLL', []);
    
    while (true)
        tline = fgetl(fileID);
        if (tline == -1) 
            break;
        end
        strings = textscan(tline, '%s', 'Delimiter', ', ', 'MultipleDelimsAsOne', 1);
        if (strcmp(strings{1}(1),'Projection'))
            calibration(1).utmzone = floor(str2double(strings{1}(4))/6)+31;
        elseif (strcmp(strings{1}(1),'MMPLL'))
            calibration(1).MMPLL = [calibration(1).MMPLL; ...
                str2double(strings{1}(3)) str2double(strings{1}(4))];
        end
    end
    fclose(fileID); 
end