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package App::Dochazka::REST::Model::Privhistory;

use 5.012;
use strict;
use warnings;
use App::CELL qw( $CELL $log $meta $site );
use App::Dochazka::REST::Model::Shared qw( cud get_history load );
use Data::Dumper;
use Params::Validate qw( :all );
use Try::Tiny;

# we get 'spawn', 'reset', and accessors from parent
use parent 'App::Dochazka::Common::Model::Privhistory';




=head1 NAME

App::Dochazka::REST::Model::Privhistory - privilege history functions




=head1 SYNOPSIS

    use App::Dochazka::REST::Model::Privhistory;

    ...



=head1 DESCRIPTION

A description of the privhistory data model follows.


=head2 Privilege levels in the database

=head3 Type

The privilege levels themselves are defined in the C<privilege> enumerated
type:

    CREATE TYPE privilege AS ENUM ('passerby', 'inactive', 'active',
    'admin')


=head3 Table

Employees are associated with privilege levels using a C<privhistory>
table:

    CREATE TABLE IF NOT EXISTS privhistory (
        phid       serial PRIMARY KEY,
        eid        integer REFERENCES employees (eid) NOT NULL,
        priv       privilege NOT NULL;
        effective  timestamp NOT NULL,
        remark     text,
        stamp      json
    );



=head3 Stored procedures

There are also two stored procedures for determining privilege levels: