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lib/App/Dochazka/REST/Model/Schedintvls.pm  view on Meta::CPAN

procedure 'translate_schedintvl' -- upon success, it creates a new attribute,
C<< $self->{schedule} >>, containing the translated intervals.

=cut

sub load {
    my $self = shift;
    my ( $conn ) = validate_pos( @_,
        { isa => 'DBIx::Connector' }
    );

    my $status;
    my @results;
    try {
        $conn->run( fixup => sub {
            # prepare and execute statement
            my $sth = $_->prepare( $site->SQL_SCHEDINTVLS_SELECT );
            $sth->execute( $self->{'ssid'} );

            # since the statement returns n rows, we use a loop to fetch them
            while( defined( my $tmpres = $sth->fetchrow_hashref() ) ) {
                push( @results, $tmpres );
            }
        } );
    } catch {
        $status = $CELL->status_err( 'DOCHAZKA_DBI_ERR', args => [ $_ ] );
    };
    return $status if $status;

    # success: add a new attribute with the translated intervals
    $self->{schedule} = \@results;

    return $CELL->status_ok( "Schedule has " . scalar( @results ) . " rows" );
}
    


=head2 insert

Instance method. Attempts to INSERT one or more records (one for each
interval in the 'intvls' attribute) into the 'schedintvls' table.
Field values are taken from the object. Returns a status object.

=cut

sub insert {
    my $self = shift;
    my ( $conn ) = validate_pos( @_,
        { isa => 'DBIx::Connector' }
    );

    # the insert operation needs to take place within a transaction,
    # because all the intervals are inserted in one go
    my $status;
    try {
        $conn->txn( fixup => sub {
            my $sth = $_->prepare( $site->SQL_SCHEDINTVLS_INSERT );
            my $intvls;

            # the next sequence value is already in $self->{ssid}
            $sth->bind_param( 1, $self->{ssid} );

            # execute SQL_SCHEDINTVLS_INSERT for each element of $self->{intvls}
            map {
                $sth->bind_param( 2, $_ );
                $sth->execute;
                push @$intvls, $_;
            } @{ $self->{intvls} };
            $status = $CELL->status_ok( 
                'DOCHAZKA_SCHEDINTVLS_INSERT_OK', 
                payload => {
                    intervals => $intvls,
                    ssid => $self->{ssid},
                }
            );
        } );
    } catch {
        $status = $CELL->status_err( 'DOCHAZKA_DBI_ERR', args => [ $_ ] );
    };
    return $status;
}


=head2 update

There is no update method for schedintvls. Instead, delete and re-create.


=head2 delete

Instance method. Once we are done with the scratch intervals, they can be deleted.
Returns a status object.

=cut

sub delete {
    my $self = shift;
    my ( $conn ) = validate_pos( @_,
        { isa => 'DBIx::Connector' }
    );

    my $status;
    try {
        $conn->run( fixup => sub {
            my $sth = $_->prepare( $site->SQL_SCHEDINTVLS_DELETE );
            $sth->bind_param( 1, $self->ssid );
            $sth->execute;
            my $rows = $sth->rows;
            if ( $rows > 0 ) {
                $status = $CELL->status_ok( 'DOCHAZKA_RECORDS_DELETED', args => [ $rows ] );
            } elsif ( $rows == 0 ) {
                $status = $CELL->status_warn( 'DOCHAZKA_RECORDS_DELETED', args => [ $rows ] );
            } else {
                die( "\$sth->rows returned a weird value $rows" );
            }
        } );
    } catch {
        $status = $CELL->status_err( 'DOCHAZKA_DBI_ERR', args => [ $_ ] );
    };
    return $status;
}


=head2 json

Instance method. Returns a JSON string representation of the schedule.

=cut

sub json {
    my ( $self ) = @_;

    return JSON->new->utf8->canonical(1)->encode( $self->{schedule} );
}




=head1 FUNCTIONS

=head2 Exported functions



=head2 Non-exported functions

=head3 _next_scratch_sid

Get next value from the scratch_sid_seq sequence

=cut

sub _next_scratch_sid {
    my $val;
    my $status;
    try {
        $dbix_conn->run( fixup => sub {
            ( $val ) = $_->selectrow_array( $site->SQL_SCRATCH_SID );
        } );    
    } catch {
        $status = $CELL->status_err( 'DOCHAZKA_DBI_ERR', args => [ $_ ] );
    };
    return if $status;
    return $val;
}