#  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 prep
#@ ```
#@ echo 'ClassExpr,Sort,Token,Value'                        > /tmp/classfiltercsv.csv
#@ echo '# This is a comment'                              >> /tmp/classfiltercsv.csv
#@ echo 'any,A,net.ipv4.ip_forward,ANYVALUE'               >> /tmp/classfiltercsv.csv
#@ echo 'example_class1,z,net.ipv4.ip_forward,ANYVALUE'    >> /tmp/classfiltercsv.csv
#@ echo 'example_class2,a,net.ipv4.ip_forward,127.0.0.3'   >> /tmp/classfiltercsv.csv
#@ echo 'not_defined,Z,net.ipv4.ip_forward,NOT_DEFINED'    >> /tmp/classfiltercsv.csv
#@ echo 'example_class3,1,net.ipv4.ip_forward,127.0.0.4'   >> /tmp/classfiltercsv.csv
#@ echo 'also_undefined,0,net.ipv4.ip_forward,NOT_DEFINED'  >> /tmp/classfiltercsv.csv
#@ sed -i 's/$/\r/' /tmp/classfiltercsv.csv
#@ ```
#+end_src

###############################################################################

#+begin_src cfengine3
bundle agent example_classfiltercsv
{
  classes:
      "example_class1";
      "example_class2";
      "example_class3";

  vars:
      "data_file" string => "/tmp/classfiltercsv.csv";
      "d" data => classfiltercsv($(data_file), "true", 0, 1);

  reports:
      "Filtered data: $(with)" with => string_mustache("{{%-top-}}", d);
}
bundle agent __main__
{
  methods:
      "example_classfiltercsv";
}
#+end_src
#+begin_src example_output
#@ ```
#@ R: Filtered data: [
#@   {
#@     "Sort": "1",
#@     "Token": "net.ipv4.ip_forward",
#@     "Value": "127.0.0.4"
#@   },
#@   {
#@     "Sort": "A",
#@     "Token": "net.ipv4.ip_forward",
#@     "Value": "ANYVALUE"
#@   },
#@   {
#@     "Sort": "a",
#@     "Token": "net.ipv4.ip_forward",
#@     "Value": "127.0.0.3"
#@   },
#@   {
#@     "Sort": "z",
#@     "Token": "net.ipv4.ip_forward",
#@     "Value": "ANYVALUE"
#@   }
#@ ]
#@ ```
#+end_src