File Coverage

blib/lib/Game/Battleship/Player.pm

Criterion	Covered	Total	%
statement	56	62	90.3
branch	18	24	75.0
condition	1	3	33.3
subroutine	10	10	100.0
pod	4	4	100.0
total	89	103	86.4

package Game::Battleship::Player;
$Game::Battleship::Player::VERSION = '0.0601';
our $AUTHORITY = 'cpan:GENE';

use Carp;
use Game::Battleship::Craft;
use Game::Battleship::Grid;
use Moo;
use Types::Standard qw( ArrayRef Int Str );

has id => (
    is  => 'ro',
    isa => Str,
);

has name => (
    is  => 'ro',
    isa => Str,
);

has life => (
    is  => 'ro',
    isa => Int,
);

has fleet => (
    is      => 'ro',
    isa     => ArrayRef,
    default => sub {
        [
            Game::Battleship::Craft->new(
                name   => 'aircraft carrier',
                points => 5,
            ),
            Game::Battleship::Craft->new(
                name   => 'battleship',
                points => 4,
            ),
            Game::Battleship::Craft->new(
                name   => 'cruiser',
                points => 3,
            ),
            Game::Battleship::Craft->new(
                name   => 'submarine',
                points => 3,
            ),
            Game::Battleship::Craft->new(
                name   => 'destroyer',
                points => 2,
            ),
        ]
    },
);

has dimensions => (
    is  => 'ro',
    isa => ArrayRef[Int],
);

has grid => (
    is  => 'ro',
    isa => ArrayRef,
);

sub BUILD {
    my $self = shift;

    $self->{grid} =
        Game::Battleship::Grid->new(
            fleet      => $self->fleet,
            dimensions => $self->dimensions,
        );

    # Compute the life points for this player.
    $self->{life} += $_->points for @{ $self->fleet };
}

# The enemy must be a G::B::Player object.
sub matrix {
    my ($self, $enemy) = @_;
    return $enemy
        ? join "\n",
            map { "@$_" } @{ $self->{$enemy->name}{matrix} }
        : join "\n",
            map { "@$_" } @{ $self->{grid}{matrix} };
}

# The enemy must be a G::B::Player object.
sub strike {
    my ($self, $enemy, $x, $y) = @_;

    croak "No opponent to strike.\n" unless $enemy;
    croak "No coordinate at which to strike.\n"
        unless defined $x && defined $y;

    if ($enemy->life > 0) {
        # Initialize the enemy grid map if we need to.
        $self->{$enemy->name} = Game::Battleship::Grid->new
            unless exists $self->{$enemy->name};

        my $enemy_pos = \$enemy->{grid}{matrix}[$x][$y];
        my $map_pos   = \$self->{$enemy->name}{matrix}[$x][$y];

        if ($$map_pos ne '.') {
            warn "Duplicate strike on ", $enemy->name, ' by ', $self->name, " at $x, $y.\n";
            return -1;
        }
        elsif ($enemy->_is_a_hit($x, $y)) { # Set the enemy grid map coordinate char to 'hit'.
            $$map_pos = 'x';

            # What craft was hit?
            my $craft = $self->craft(id => $$enemy_pos);

            warn $self->name, ' hit ', $enemy->name, "'s ", $craft->name, "!\n";

            # How much is left on this craft?
            my $remainder = $craft->hit;

            # Tally the hit in the craft object, itself and emit a happy
            # warning if it was totally destroyed.
            warn $self->name, ' sunk ', $enemy->name, "'s ", $craft->name, "!\n"
                unless $remainder;

            # Indicate the hit on the enemy grid by lowercasing the craft
            # id.
            $$enemy_pos = lc $$enemy_pos;

            # Increment the player's score.
            $self->{score}++;

            # Decrement the opponent's life.
            warn $enemy->name, " is out of the game.\n"
                if --$enemy->{life} <= 0;

            return 1;
        }
        else {
            # Set the enemy grid map coordinate char to 'miss'.
            warn $self->name, ' missed ', $enemy->name, " at $x, $y.\n";
            $$map_pos = 'o';
            return 0;
        }
    }
    else {
        warn $enemy->name, " is already out of the game. Strike another opponent.\n";
        return -1;
    }
}

sub _is_a_hit {
    my ($self, $x, $y) = @_;
    return $self->{grid}{matrix}[$x][$y] ne '.'
        ? 1 : 0;
}

sub craft {
    my ($self, $key, $val) = @_;

    # If the key is not defined, assume it's supposed to be the id.
    unless (defined $val) {
        $val = $key;
        $key = 'id';
    }

    my $craft;

    for (@{ $self->{fleet} }) {
        if ($val eq $_->{$key}) {
            $craft = $_;
            last;
        }
    }

    return $craft;
}

1;

__END__