NAME

       Config::Model::Itself - Model editor for Config::Model

VERSION

       version 2.003

SYNOPSIS

        # Itself constructor returns an object to read or write the data
        # structure containing the model to be edited
        my $meta_model = Config::Model::Itself -> new( ) ;

        # now load the model to be edited
        $meta_model -> read_all( ) ;

        # For Curses UI prepare a call-back to write model
        my $wr_back = sub { $meta_model->write_all(); }

        # create Curses user interface
        my $dialog = Config::Model::CursesUI-> new (
             store => $wr_back,
        ) ;

        # start Curses dialog to edit the mode
        $dialog->start( $meta_model->config_root )  ;

        # that's it. When user quits curses interface, Curses will call
        # $wr_back sub ref to write the modified model.

DESCRIPTION

       Config::Itself module and its model files provide a model of Config:Model (hence the
       Itself name).

       Let's step back a little to explain. Any configuration data is, in essence, structured
       data. This data could be stored in an XML file. A configuration model is a way to describe
       the structure and relation of all items of a configuration data set.

       This configuration model is also expressed as structured data. This structure data is
       structured and follow a set of rules which are described for humans in Config::Model.

       The structure and rules documented in Config::Model are also expressed in a model in the
       files provided with "Config::Model::Itself".

       Hence the possibity to verify, modify configuration data provided by Config::Model can
       also be applied on configuration models. Using the same user interface.

       From a Perl point of view, Config::Model::Itself provides a class dedicated to read and
       write a set of model files.

Constructor

   new ( [ cm_lib_dir => ... ] )
       Creates a new read/write handler. If no model_object is passed, the required objects are
       created. "cm_lib_dir" specifies where are the model files (defaults to
       "./lib/Config/Model".

       "cm_lib_dir" is either a "Path::Tiny" object or a string.

       By default, this constructor will create all necessary "Config::Model*" objects.  If
       needed, you can pass already created object with options "config_model" (Config::Model
       object), "meta_instance" (Config::Model::Instance object) or "meta_root"
       (Config::Model::Node object).

   Methods

read_all ( [ root_model => ... ], [ force_load => 1 ] )

       Load all the model files contained in "model_dir" and all its subdirectories. "root_model"
       is used to filter the classes read.

       Use "force_load" if you are trying to load a model containing errors.

       "read_all" returns a hash ref containing ( class_name => file_name , ...)

   write_all
       Will write back configuration model in the specified directory. The structure of the read
       directory is respected.

   write_model_snippet( snippet_dir => foo, model_file => bar.pl )
       Write snippet models in separate ".d" directory. E.g. a snippet for class "Foo::Bar" will
       be written in "Foo/Bar.d/bar.pl" file. This file is to be used by augment_config_class
       '...', class_data )">

   read_model_snippet( snippet_dir => foo, model_file => bar.pl )
       To read model snippets, this methid will search recursively $snippet_dir and load all
       "bar.pl" files found in there.

   list_class_element
       Returns a string listing all the class and elements. Useful for debugging your
       configuration model.

   get_dot_diagram
       Returns a graphviz dot file that represents the structure of the configuration model:

       •   "include" relations are represented by solid lines

       •   Class usage (i.e. "config_class_name" parameter) is represented by dashed lines. The
           name of the element is attached to the dashed line.

SEE ALSO

       Config::Model, Config::Model::Node, Path::Tiny

AUTHOR

       Dominique Dumont

COPYRIGHT AND LICENSE

       This software is Copyright (c) 2016 by Dominique Dumont.

       This is free software, licensed under:

         The GNU Lesser General Public License, Version 2.1, February 1999