#  Copyright 2021 Northern.tech AS

#  This file is part of CFEngine 3 - written and maintained by Northern.tech AS.

#  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; version 3.

#  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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA

# To the extent this program is licensed as part of the Enterprise
# versions of Cfengine, the applicable Commercial Open Source License
# (COSL) may apply to this file if you as a licensee so wish it. See
# included file COSL.txt.

#+begin_src cfengine3
body common control
{
      bundlesequence => { "run" };
}

bundle agent run
{
  vars:
      "tester" data => '{ "x": 100, "y": [ true, "a", "b" ] }';

      # "jq ." returns the same thing that was passed in
      "pipe_passthrough" data => mapdata("json_pipe", '$(def.jq) .', tester);
      "pipe_passthrough_str" string => format("%S", pipe_passthrough);

      # "jq .x" returns what was under x wrapped in an array: [100]
      "pipe_justx" data => mapdata("json_pipe", '$(def.jq) .x', tester);
      "pipe_justx_str" string => format("%S", pipe_justx);

      # "jq .y" returns what was under y wrapped in an array: [[true,"a","b"]]
      "pipe_justy" data => mapdata("json_pipe", '$(def.jq) .y', tester);
      "pipe_justy_str" string => format("%S", pipe_justy);

      # "jq .y[]" returns each entry under y *separately*: [true,"a","b"]
      "pipe_yarray" data => mapdata("json_pipe", '$(def.jq) .y[]', tester);
      "pipe_yarray_str" string => format("%S", pipe_yarray);

      # "jq .z" returns null because the key "z" is missing: [null]
      "pipe_justz" data => mapdata("json_pipe", '$(def.jq) .z', tester);
      "pipe_justz_str" string => format("%S", pipe_justz);

      # "jq" can do math too! and much more!
      "pipe_jqmath" data => mapdata("json_pipe", '$(def.jq) 1+2+3', tester);
      "pipe_jqmath_str" string => format("%S", pipe_jqmath);

  reports:
      "mapdata/json_pipe passthrough result: $(pipe_passthrough_str)";
      "mapdata/json_pipe just x result: $(pipe_justx_str)";
      "mapdata/json_pipe just y result: $(pipe_justy_str)";
      "mapdata/json_pipe array under y result: $(pipe_yarray_str)";
      "mapdata/json_pipe just z result: $(pipe_justz_str)";
      "mapdata/json_pipe math expression result: $(pipe_jqmath_str)";
}

#+end_src
###############################################################################
#+begin_src output
#@ ```
#@ R: mapdata/json_pipe passthrough result: [{"x":100,"y":[true,"a","b"]}]
#@ R: mapdata/json_pipe just x result: [100]
#@ R: mapdata/json_pipe just y result: [[true,"a","b"]]
#@ R: mapdata/json_pipe array under y result: [true,"a","b"]
#@ R: mapdata/json_pipe just z result: [null]
#@ R: mapdata/json_pipe math expression result: [6]
#@ ```
#+end_src