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package App::PRT::Command::DeleteMethod;
use strict;
use warnings;
use PPI;
sub new {
my ($class) = @_;
bless {}, $class;
}
# parse arguments from CLI
# arguments:
# @arguments
# returns:
# @rest_arguments
sub parse_arguments {
my ($self, @arguments) = @_;
die "class and method required" unless @arguments >= 2;
$self->register(shift @arguments => shift @arguments);
@arguments;
}
# register a replacing rule
# arguments:
# $target_class_name: Target Class Name
# $target_method_name: Target Method Name
sub register {
my ($self, $target_class_name, $target_method_name) = @_;
$self->{target_class_name} = $target_class_name;
$self->{target_method_name} = $target_method_name;
}
sub target_class_name {
my ($self) = @_;
$self->{target_class_name};
}
sub target_method_name {
my ($self) = @_;
$self->{target_method_name};
}
sub deleted_code {
my ($self) = @_;
$self->{deleted_code};
}
# refactor a file
# argumensts:
# $file: filename for refactoring
sub execute {
my ($self, $file) = @_;
my $document = PPI::Document->new($file);
return unless $document;
my $package = $document->find_first('PPI::Statement::Package');
return unless $package;
return unless $package->namespace eq $self->target_class_name;
my $subs = $document->find('PPI::Statement::Sub');
my $replaced = 0;
for my $sub (@$subs) {
next unless $sub->name eq $self->target_method_name;
my @garbages;
# comment before method
my $cursor = $sub->first_token->previous_token;
while (defined $cursor && ref $cursor eq 'PPI::Token::Comment') {
unshift @garbages, $cursor;
$cursor = $cursor->previous_token;
}
# method body
push @garbages, $sub;
# whitespace after method
$cursor = $sub->last_token->next_token;
while (defined $cursor && ref $cursor eq 'PPI::Token::Whitespace') {
push @garbages, $cursor;
$cursor = $cursor->next_token;
}
$self->{deleted_code} = join '', @garbages;
$_->remove for @garbages;
$replaced++;
}
$document->save($file) if $replaced;
}
1;
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