%
% -----------------
% Copyright © 2022 ACK Cyfronet AGH, Poland.
% --------------
%
function columnIdx = findCatalogColumn(catalog, colName)
% FINDCATALOGCOLUMN Find the index of a column in a catalog
%
%   columnIdx = FINDCATALOGCOLUMN(catalog, colName) returns the index of
%   the column with the specified name within the given catalog structure.
%   The catalog is expected to be an array of structures where each
%   structure has a 'field' representing the column name.
%
%   Example:
%       catalog(1).field = 'ID'; catalog(2).field = 'Time';
%       idx = findCatalogColumn(catalog, 'Time');
%       % Result: idx = 2
%
%   For more details on the catalog format, refer to the documentation:
%   https://docs.cyfronet.pl/display/ISDOC/Catalog+-+description
%
%   Note: This function is intended to be used in conjunction with other
%   catalog processing functions.
%
%   See also: EXTRACTCOLUMNS.

    for c = 1:length(catalog)
        if strcmp(catalog(c).field, colName)
            columnIdx = c;
            break;
        end
    end
    if exist('columnIdx') ~= 1
        error('no column named %s', colName);
    end
end