NAME
   Data::Censor - censor sensitive stuff in a data structure

VERSION
   Version 0.02

SYNOPSIS
       # OO way, letting you specify your own list of sensitive-looking fields, and
       # what they should be replaced by (all options here are optional)
       my $censor = Data::Censor->new(
           # Specify which fields to censor:
           sensitive_fields => [ qw(card_number password) ],

           # Specify text to replace their values with:
           replacement => '(Sensitive data hidden)',

           # Or specify callbacks for each field name which return the "censored"
           # value - in this case, masking a card number (PAN) to show only the
           # last four digits:
           replacement_callbacks => {
               card_number => sub {
                   my $pan = shift;
                   return "x" x (length($pan) - 4) . substr($pan, -4, 4);
               },
           },
       );

       # Censor the data in-place (changes the data structure, returns the number
       # of keys censored)
       my $censor_count = $censor->censor(\%data);

       # Alternate non-OO interface, using default settings and returning a cloned
       # version of the data after censoring:
       my $censored_data = Data::Censor->clone_and_censor(\%data);

new (CONSTRUCTOR)
   Accepts the following arguments:

   sensitive_fields
       Either an arrayref of sensitive fields, checked for equality, or a
       regex to test against each key to see if it's considered sensitive.

   replacement
       The string to replace each value with. Any censoring callback
       provided in `replacement_callbacks' which matches this key will take
       precedence over this straightforward value.

   replacement_callbacks
       A hashref of key => sub {...}, where each key is a column name to
       match, and the coderef takes the uncensored value and returns the
       censored value, letting you for instance mask a card number but
       leave the last 4 digits visible.

       If you provide both `replacement' and `replacement_callbacks', any
       callback defined which matches the key being considered takes
       precedence. =back

METHODS
 censor
       Given a data structure (hashref), clones it and returns the cloned
       version after censoring potentially sensitive data within.

 clone_and_censor
       Clones the provided hashref (using Clone - will die if not
       installed), then censors the cloned data and returns it.

       Can be used both as a class or object method - the former for a
       quick way to use it without having to instantiate an object, the
       latter if you want to apply custom settings to the object before
       using it.

         # As a class method
         my $censored_data = Data::Censor->clone_and_censor($data);

         # or as an object method
         my $censor = Data::Censor->new( replacement => "SECRET!" );
         my $censored_data = $censor->clone_and_censor($data);

AUTHOR
       David Precious (BIGPRESH), `<davidp at preshweb.co.uk>'

       This code was originally written for the Dancer project by myself;
       I've pulled it out into a seperate distribution as I was using it
       for code at work.

SUPPORT
       You can find documentation for this module with the perldoc command.

           perldoc Data::Censor

LICENSE AND COPYRIGHT
       Copyright 2014 David Precious.

       This program is free software; you can redistribute it and/or modify
       it under the terms of the the Artistic License (2.0). You may obtain
       a copy of the full license at:

       http://www.perlfoundation.org/artistic_license_2_0

       Any use, modification, and distribution of the Standard or Modified
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       or distributing the Package, you accept this license. Do not use,
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       this license.

       This license does not grant you the right to use any trademark,
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