=encoding utf8

=head1 NAME

Math::Formula::Config::JSON - load/save formulas to file

=head1 INHERITANCE

 Math::Formula::Config::JSON
   is a Math::Formula::Config

=head1 SYNOPSIS

  my $context = Math::Formula::Content->new(name => 'test');
  my $config = Math::Formula::Config::INI->JSON(directory => $dir);

  $config->save($context);
  my $context = $config->load('test');

=head1 DESCRIPTION

Save and load a L<Math::Formula::Context|Math::Formula::Context> to JSON files.

You need to have installed B<Cpanel::JSON::XS>.  That module is not in the
dependencies of this packages, because we do not want to add complications
to the main code.

Extends L<"DESCRIPTION" in Math::Formula::Config|Math::Formula::Config/"DESCRIPTION">.
 
=head1 METHODS

Extends L<"METHODS" in Math::Formula::Config|Math::Formula::Config/"METHODS">.
 
=head2 Constructors

Extends L<"Constructors" in Math::Formula::Config|Math::Formula::Config/"Constructors">.
 
=over 4

=item Math::Formula::Config::JSON-E<gt>B<new>(%options)

Inherited, see L<Math::Formula::Config/"Constructors">

=back

=head2 Attributes

Extends L<"Attributes" in Math::Formula::Config|Math::Formula::Config/"Attributes">.
 
=over 4

=item $obj-E<gt>B<directory>()

Inherited, see L<Math::Formula::Config/"Attributes">

=item $obj-E<gt>B<path_for>($file)

Inherited, see L<Math::Formula::Config/"Attributes">

=back

=head2 Actions

Extends L<"Actions" in Math::Formula::Config|Math::Formula::Config/"Actions">.
 
=over 4

=item $obj-E<gt>B<load>($name, %options)

Load a L<Math::Formula::Context|Math::Formula::Context> for a yml file.

 -Option  --Default
  filename  <directory/$name.yml>

=over 2

=item filename => FILENAME

=back

=item $obj-E<gt>B<save>($context, %args)

Serialize the $context to JSON files, as storage or to be editted by hand.
This is a usefull method when default configuration templates need to be generated.

 -Option  --Default
  filename  C<< $context->name .json>

=over 2

=item filename => STRING

Save under a different filename than derived from the name of the context.

=back

=back

=head1 DETAILS

JSON seems to be everyone's favorit serialization syntax, nowadays.  It natively
supports integers, floats, booleans, and strings.  Formulas get a leading '='
(not yet configurable).

B<. Example>

{
   "created" : "2023-02-28T16:30:27+0000",
   "formulas" : {
      "expr1" : "=1 + 2 * 3",
      "expr2" : "=\"abc\".size + 3k; returns='MF::INTEGER'",
      "fakes" : false,
      "float" : 3.14,
      "int" : 42,
      "longer" : "abc def yes no",
      "no_quotes" : "abc",
      "some_truth" : true,
      "string" : "true"
   },
   "mf_version" : "",
   "name" : "test",
   "updated" : "2023-02-28T16:30:27+0000",
   "version" : 1.0
}

=head1 SEE ALSO

This module is part of Math-Formula distribution version 0.14,
built on February 28, 2023. Website: F<http://perl.overmeer.net/CPAN/>

=head1 LICENSE

Copyrights 2023 by [Mark Overmeer <markov@cpan.org>]. For other contributors see ChangeLog.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See F<http://dev.perl.org/licenses/>

