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# You may distribute under the terms of either the GNU General Public License |
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# or the Artistic License (the same terms as Perl itself) |
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# |
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# (C) Paul Evans, 2008-2015 -- leonerd@leonerd.org.uk |
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package Protocol::IRC::Message; |
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use strict; |
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use warnings; |
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our $VERSION = '0.11'; |
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use Carp; |
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our @CARP_NOT = qw( Net::Async::IRC ); |
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=head1 NAME |
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C - encapsulates a single IRC message |
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=head1 SYNOPSIS |
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use Protocol::IRC::Message; |
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my $hello = Protocol::IRC::Message->new( |
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"PRIVMSG", |
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undef, |
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"World", |
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"Hello, world!" |
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); |
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printf "The command is %s and the final argument is %s\n", |
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$hello->command, $hello->arg( -1 ); |
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=head1 DESCRIPTION |
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An object in this class represents a single IRC message, either received from |
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or to be sent to the server. These objects are immutable once constructed, but |
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provide a variety of methods to access the contained information. |
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This class also understands IRCv3 message tags. |
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=cut |
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=head1 CONSTRUCTOR |
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=cut |
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=head2 new_from_line |
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$message = Protocol::IRC::Message->new_from_line( $line ) |
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Returns a new C object, constructed by parsing the |
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given IRC line. Most typically used to create a new object to represent a |
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message received from the server. |
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=cut |
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sub new_from_line |
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{ |
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my $class = shift; |
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my ( $line ) = @_; |
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my %tags; |
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if( $line =~ s/^\@([^ ]+) +// ) { |
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foreach ( split m/;/, $1 ) { |
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if( m/^([^=]+)=(.*)$/ ) { |
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$tags{$1} = $2; |
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} |
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else { |
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$tags{$_} = undef; |
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} |
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} |
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} |
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my $prefix; |
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if( $line =~ s/^:([^ ]+) +// ) { |
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$prefix = $1; |
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} |
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my ( $mid, $final ) = split( m/ +:/, $line, 2 ); |
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my @args = split( m/ +/, $mid ); |
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push @args, $final if defined $final; |
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my $command = shift @args; |
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return $class->new_with_tags( $command, \%tags, $prefix, @args ); |
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} |
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=head2 new |
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$message = Protocol::IRC::Message->new( $command, $prefix, @args ) |
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Returns a new C object, intialised from the given |
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components. Most typically used to create a new object to send to the server |
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using C. The message will contain no IRCv3 tags. |
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=cut |
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sub new |
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{ |
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my $class = shift; |
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return $class->new_with_tags( $_[0], {}, $_[1], @_[2..$#_] ); |
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} |
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=head2 new_with_tags |
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$mesage = Protocol::IRC::Message->new_with_tags( $command, \%tags, $prefix, @args ) |
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Returns a new C object, as with C but also |
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containing the given IRCv3 tags. |
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=cut |
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sub new_with_tags |
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{ |
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my $class = shift; |
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my ( $command, $tags, $prefix, @args ) = @_; |
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# IRC is case-insensitive for commands, but we'd like them in uppercase |
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# to keep things simpler |
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$command = uc $command; |
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# Less strict checking than RFC 2812 because a lot of servers lately seem |
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# to be more flexible than that. |
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$command =~ m/^[A-Z]+$/ or $command =~ m/^\d\d\d$/ or |
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croak "Command must be just letters or three digits"; |
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foreach my $key ( keys %$tags ) { |
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$key =~ m{^[a-zA-Z0-9./-]+$} or |
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croak "Tag key '$key' is invalid"; |
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my $value = $tags->{$key}; |
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defined $value and $value =~ m{[ ;]} and |
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croak "Tag value '$value' for key '$key' is invalid"; |
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} |
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if( defined $prefix ) { |
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$prefix =~ m/[ \t\x0d\x0a]/ and |
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croak "Prefix must not contain whitespace"; |
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} |
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foreach ( @args[0 .. $#args-1] ) { # Not the final |
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defined or croak "Argument must be defined"; |
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m/[ \t\x0d\x0a]/ and |
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croak "Argument must not contain whitespace"; |
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} |
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if( @args ) { |
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defined $args[-1] or croak "Final argument must be defined"; |
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$args[-1] =~ m/[\x0d\x0a]/ and croak "Final argument must not contain a linefeed"; |
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} |
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my $self = { |
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command => $command, |
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prefix => $prefix, |
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args => \@args, |
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tags => { %$tags }, |
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}; |
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return bless $self, $class; |
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} |
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=head1 METHODS |
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=cut |
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169
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=head2 STRING |
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171
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$str = $message->STRING |
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$str = "$message" |
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Returns a string representing the message, suitable for use in a debugging |
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message or similar. I: This is not the same as the IRC wire form, to |
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send to the IRC server; for that see C. |
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=cut |
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181
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use overload '""' => "STRING"; |
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10066
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182
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sub STRING |
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{ |
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my $self = shift; |
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my $class = ref $self; |
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return $class . "[" . |
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( defined $self->{prefix} ? "prefix=$self->{prefix}," : "" ) . |
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"cmd=$self->{command}," . |
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"args=(" . join( ",", @{ $self->{args} } ) . ")]"; |
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} |
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192
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=head2 command |
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$command = $message->command |
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Returns the command name or numeric stored in the message object. |
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=cut |
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200
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sub command |
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{ |
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5005
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my $self = shift; |
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568
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return $self->{command}; |
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} |
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206
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=head2 command_name |
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208
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$name = $message->command_name |
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For named commands, returns the command name directly. For server numeric |
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replies, returns the name of the numeric. |
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213
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=cut |
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215
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my %NUMERIC_NAMES; |
216
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217
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sub command_name |
218
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{ |
219
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20
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20
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1
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34
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my $self = shift; |
220
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return $NUMERIC_NAMES{ $self->command } || $self->command; |
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} |
222
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223
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=head2 tags |
224
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225
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$tags = $message->tags |
226
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227
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Returns a HASH reference containing IRCv3 message tags. This is a reference to |
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the hash stored directly by the object itself, so the caller should be careful |
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not to modify it. |
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=cut |
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sub tags |
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{ |
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my $self = shift; |
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return $self->{tags} |
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} |
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=head2 prefix |
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$prefix = $message->prefix |
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Returns the line prefix stored in the object, or the empty string if one was |
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not supplied. |
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=cut |
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sub prefix |
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{ |
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my $self = shift; |
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return defined $self->{prefix} ? $self->{prefix} : ""; |
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} |
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=head2 prefix_split |
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( $nick, $ident, $host ) = $message->prefix_split |
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Splits the prefix into its nick, ident and host components. If the prefix |
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contains only a hostname (such as the server name), the first two components |
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will be returned as C. |
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=cut |
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sub prefix_split |
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{ |
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my $self = shift; |
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my $prefix = $self->prefix; |
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return ( $1, $2, $3 ) if $prefix =~ m/^(.*?)!(.*?)@(.*)$/; |
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# $prefix doesn't split into nick!ident@host so presume host only |
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return ( undef, undef, $prefix ); |
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} |
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=head2 arg |
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$arg = $message->arg( $index ) |
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Returns the argument at the given index. Uses normal perl array indexing, so |
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negative indices work as expected. |
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=cut |
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sub arg |
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{ |
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1
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my $self = shift; |
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my ( $index ) = @_; |
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return $self->{args}[$index]; |
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} |
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292
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=head2 args |
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@args = $message->args |
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296
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Returns a list containing all the message arguments. |
297
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298
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=cut |
299
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300
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sub args |
301
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{ |
302
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14
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14
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1
|
22
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my $self = shift; |
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20
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return @{$self->{args}}; |
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82
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304
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} |
305
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306
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=head2 stream_to_line |
307
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308
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$line = $message->stream_to_line |
309
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310
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Returns a string suitable for sending the message to the IRC server. |
311
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312
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=cut |
313
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314
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sub stream_to_line |
315
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{ |
316
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13
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13
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1
|
23
|
my $self = shift; |
317
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318
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13
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21
|
my $line = ""; |
319
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320
|
13
|
100
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|
17
|
if( keys %{ $self->{tags} } ) { |
|
13
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85
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|
321
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1
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2
|
my $tags = $self->{tags}; |
322
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1
|
50
|
|
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|
4
|
$line .= "\@" . join( ";", map { defined $tags->{$_} ? "$_=$tags->{$_}" : $_ } keys %$tags ) . " "; |
|
1
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8
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323
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} |
324
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325
|
13
|
100
|
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|
38
|
if( defined $self->{prefix} ) { |
326
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2
|
|
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|
7
|
$line .= ":$self->{prefix} "; |
327
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|
} |
328
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329
|
13
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31
|
$line .= $self->{command}; |
330
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331
|
13
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|
|
18
|
foreach ( @{$self->{args}} ) { |
|
13
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|
36
|
|
332
|
20
|
100
|
100
|
|
|
122
|
if( m/ / or m/^:/ ) { |
333
|
7
|
|
|
|
|
22
|
$line .= " :$_"; |
334
|
|
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|
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|
|
} |
335
|
|
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|
|
|
else { |
336
|
13
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|
|
34
|
$line .= " $_"; |
337
|
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|
|
} |
338
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|
|
} |
339
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340
|
13
|
|
|
|
|
61
|
return $line; |
341
|
|
|
|
|
|
|
} |
342
|
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|
343
|
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|
|
|
# Argument naming information |
344
|
|
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|
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|
|
345
|
|
|
|
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|
|
# This hash holds HASH refs giving the names of the positional arguments of |
346
|
|
|
|
|
|
|
# any message. The hash keys store the argument names, and the values store |
347
|
|
|
|
|
|
|
# an argument index, the string "pn" meaning prefix nick, or "$n~$m" meaning |
348
|
|
|
|
|
|
|
# an index range. Endpoint can be absent. |
349
|
|
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|
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|
|
|
350
|
|
|
|
|
|
|
my %ARG_NAMES = ( |
351
|
|
|
|
|
|
|
INVITE => { inviter_nick => "pn", |
352
|
|
|
|
|
|
|
invited_nick => 0, |
353
|
|
|
|
|
|
|
target_name => 1 }, |
354
|
|
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|
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|
|
KICK => { kicker_nick => "pn", |
355
|
|
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|
|
|
|
target_name => 0, |
356
|
|
|
|
|
|
|
kicked_nick => 1, |
357
|
|
|
|
|
|
|
text => 2 }, |
358
|
|
|
|
|
|
|
MODE => { target_name => 0, |
359
|
|
|
|
|
|
|
modechars => 1, |
360
|
|
|
|
|
|
|
modeargs => "2.." }, |
361
|
|
|
|
|
|
|
NICK => { old_nick => "pn", |
362
|
|
|
|
|
|
|
new_nick => 0 }, |
363
|
|
|
|
|
|
|
NOTICE => { targets => 0, |
364
|
|
|
|
|
|
|
text => 1 }, |
365
|
|
|
|
|
|
|
PING => { text => 0 }, |
366
|
|
|
|
|
|
|
PONG => { text => 0 }, |
367
|
|
|
|
|
|
|
QUIT => { text => 0 }, |
368
|
|
|
|
|
|
|
PART => { target_name => 0, |
369
|
|
|
|
|
|
|
text => 1 }, |
370
|
|
|
|
|
|
|
PRIVMSG => { targets => 0, |
371
|
|
|
|
|
|
|
text => 1 }, |
372
|
|
|
|
|
|
|
TOPIC => { target_name => 0, |
373
|
|
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|
|
|
|
text => 1 }, |
374
|
|
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|
|
|
|
); |
375
|
|
|
|
|
|
|
|
376
|
|
|
|
|
|
|
# Misc. named commands |
377
|
|
|
|
|
|
|
$ARG_NAMES{$_} = { target_name => 0 } for qw( |
378
|
|
|
|
|
|
|
JOIN LIST NAMES WHO WHOIS WHOWAS |
379
|
|
|
|
|
|
|
); |
380
|
|
|
|
|
|
|
|
381
|
|
|
|
|
|
|
# TODO: 472 ERR_UNKNOWNMODE: :is unknown mode char to me for |
382
|
|
|
|
|
|
|
# How to parse this one?? |
383
|
|
|
|
|
|
|
|
384
|
|
|
|
|
|
|
=head2 arg_names |
385
|
|
|
|
|
|
|
|
386
|
|
|
|
|
|
|
$names = $message->arg_names |
387
|
|
|
|
|
|
|
|
388
|
|
|
|
|
|
|
Returns a HASH reference giving details on how to parse named arguments for |
389
|
|
|
|
|
|
|
the command given in this message. |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
This will be a hash whose keys give the names of the arguments, and the values |
392
|
|
|
|
|
|
|
of these keys indicate how that argument is derived from the simple positional |
393
|
|
|
|
|
|
|
arguments. |
394
|
|
|
|
|
|
|
|
395
|
|
|
|
|
|
|
Normally this method is only called internally by the C method, |
396
|
|
|
|
|
|
|
but is documented here for the benefit of completeness, and in case extension |
397
|
|
|
|
|
|
|
modules wish to define parsing of new message types. |
398
|
|
|
|
|
|
|
|
399
|
|
|
|
|
|
|
Each value should be one of the following: |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
=over 4 |
402
|
|
|
|
|
|
|
|
403
|
|
|
|
|
|
|
=item * String literal C |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
The value is a string, the nickname given in the message prefix |
406
|
|
|
|
|
|
|
|
407
|
|
|
|
|
|
|
=item * NUMBER..NUMBER |
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
The value is an ARRAY ref, containing a list of all the numbered arguments |
410
|
|
|
|
|
|
|
between the (inclusive) given limits. Either or both limits may be negative; |
411
|
|
|
|
|
|
|
they will count backwards from the end. |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
=item * NUMBER |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
The value is the argument at that numeric index. May be negative to count |
416
|
|
|
|
|
|
|
backwards from the end. |
417
|
|
|
|
|
|
|
|
418
|
|
|
|
|
|
|
=item * NUMBER@ |
419
|
|
|
|
|
|
|
|
420
|
|
|
|
|
|
|
The value is the argument at that numeric index as for C, except that |
421
|
|
|
|
|
|
|
the result will be split on spaces and stored in an ARRAY ref. |
422
|
|
|
|
|
|
|
|
423
|
|
|
|
|
|
|
=back |
424
|
|
|
|
|
|
|
|
425
|
|
|
|
|
|
|
=cut |
426
|
|
|
|
|
|
|
|
427
|
|
|
|
|
|
|
sub arg_names |
428
|
|
|
|
|
|
|
{ |
429
|
|
|
|
|
|
|
# Usage: Class->arg_names($command) or $self->arg_names() |
430
|
31
|
|
|
31
|
1
|
60
|
my $command; |
431
|
|
|
|
|
|
|
|
432
|
31
|
100
|
|
|
|
73
|
if( ref $_[0] ) { |
433
|
30
|
|
|
|
|
42
|
my $self = shift; |
434
|
30
|
|
|
|
|
85
|
$command = $self->{command}; |
435
|
|
|
|
|
|
|
} |
436
|
|
|
|
|
|
|
else { |
437
|
1
|
|
|
|
|
2
|
my $class = shift; # ignore |
438
|
1
|
|
|
|
|
2
|
( $command ) = @_; |
439
|
1
|
50
|
|
|
|
4
|
defined $command or croak 'Usage: '.__PACKAGE__.'->arg_names($command)'; |
440
|
|
|
|
|
|
|
} |
441
|
|
|
|
|
|
|
|
442
|
31
|
|
|
|
|
121
|
return $ARG_NAMES{$command}; |
443
|
|
|
|
|
|
|
} |
444
|
|
|
|
|
|
|
|
445
|
|
|
|
|
|
|
=head2 named_args |
446
|
|
|
|
|
|
|
|
447
|
|
|
|
|
|
|
$args = $message->named_args |
448
|
|
|
|
|
|
|
|
449
|
|
|
|
|
|
|
Parses arguments in the message according to the specification given by the |
450
|
|
|
|
|
|
|
C method. Returns a hash of parsed arguments. |
451
|
|
|
|
|
|
|
|
452
|
|
|
|
|
|
|
TODO: More complete documentation on the exact arg names/values per message |
453
|
|
|
|
|
|
|
type. |
454
|
|
|
|
|
|
|
|
455
|
|
|
|
|
|
|
=cut |
456
|
|
|
|
|
|
|
|
457
|
|
|
|
|
|
|
sub named_args |
458
|
|
|
|
|
|
|
{ |
459
|
24
|
|
|
24
|
1
|
37
|
my $self = shift; |
460
|
|
|
|
|
|
|
|
461
|
24
|
100
|
|
|
|
56
|
my $argnames = $self->arg_names or return; |
462
|
|
|
|
|
|
|
|
463
|
23
|
|
|
|
|
35
|
my %named_args; |
464
|
23
|
|
|
|
|
71
|
foreach my $name ( keys %$argnames ) { |
465
|
46
|
|
|
|
|
77
|
my $argindex = $argnames->{$name}; |
466
|
|
|
|
|
|
|
|
467
|
46
|
|
|
|
|
61
|
my $value; |
468
|
46
|
100
|
|
|
|
267
|
if( $argindex eq "pn" ) { |
|
|
100
|
|
|
|
|
|
|
|
100
|
|
|
|
|
|
|
|
50
|
|
|
|
|
|
469
|
2
|
|
|
|
|
5
|
( $value, undef, undef ) = $self->prefix_split; |
470
|
|
|
|
|
|
|
} |
471
|
|
|
|
|
|
|
elsif( $argindex =~ m/^(-?\d+)?\.\.(-?\d+)?$/ ) { |
472
|
3
|
|
|
|
|
10
|
my ( $start, $end ) = ( $1, $2 ); |
473
|
3
|
|
|
|
|
8
|
my @args = $self->args; |
474
|
|
|
|
|
|
|
|
475
|
3
|
50
|
|
|
|
9
|
defined $start or $start = 0; |
476
|
3
|
100
|
|
|
|
17
|
defined $end or $end = $#args; |
477
|
|
|
|
|
|
|
|
478
|
3
|
100
|
|
|
|
8
|
$end += @args if $end < 0; |
479
|
|
|
|
|
|
|
|
480
|
3
|
|
|
|
|
13
|
$value = [ splice( @args, $start, $end-$start+1 ) ]; |
481
|
|
|
|
|
|
|
} |
482
|
|
|
|
|
|
|
elsif( $argindex =~ m/^-?\d+$/ ) { |
483
|
40
|
|
|
|
|
94
|
$value = $self->arg( $argindex ); |
484
|
|
|
|
|
|
|
} |
485
|
|
|
|
|
|
|
elsif( $argindex =~ m/^(-?\d+)\@$/ ) { |
486
|
1
|
|
|
|
|
3
|
$value = [ split ' ', $self->arg( $1 ) ]; |
487
|
|
|
|
|
|
|
} |
488
|
|
|
|
|
|
|
else { |
489
|
0
|
|
|
|
|
0
|
die "Unrecognised argument specification $argindex"; |
490
|
|
|
|
|
|
|
} |
491
|
|
|
|
|
|
|
|
492
|
46
|
|
|
|
|
129
|
$named_args{$name} = $value; |
493
|
|
|
|
|
|
|
} |
494
|
|
|
|
|
|
|
|
495
|
23
|
|
|
|
|
100
|
return \%named_args; |
496
|
|
|
|
|
|
|
} |
497
|
|
|
|
|
|
|
|
498
|
|
|
|
|
|
|
=head2 gate_disposition |
499
|
|
|
|
|
|
|
|
500
|
|
|
|
|
|
|
$disp = $message->gate_disposition |
501
|
|
|
|
|
|
|
|
502
|
|
|
|
|
|
|
Returns the "gating disposition" of the message. This defines how a reply |
503
|
|
|
|
|
|
|
message from the server combines with other messages in response of a command |
504
|
|
|
|
|
|
|
sent by the client. The disposition is either C, or a string consisting |
505
|
|
|
|
|
|
|
of a type symbol and a gate name. If defined, the symbol defines what effect |
506
|
|
|
|
|
|
|
it has on the gate name. |
507
|
|
|
|
|
|
|
|
508
|
|
|
|
|
|
|
=over 4 |
509
|
|
|
|
|
|
|
|
510
|
|
|
|
|
|
|
=item -GATE |
511
|
|
|
|
|
|
|
|
512
|
|
|
|
|
|
|
Adds more information to the response for that gate, but doesn't yet complete |
513
|
|
|
|
|
|
|
it. |
514
|
|
|
|
|
|
|
|
515
|
|
|
|
|
|
|
=item +GATE |
516
|
|
|
|
|
|
|
|
517
|
|
|
|
|
|
|
Completes the gate with a successful result. |
518
|
|
|
|
|
|
|
|
519
|
|
|
|
|
|
|
=item !GATE |
520
|
|
|
|
|
|
|
|
521
|
|
|
|
|
|
|
Completes the gate with a failure result. |
522
|
|
|
|
|
|
|
|
523
|
|
|
|
|
|
|
=back |
524
|
|
|
|
|
|
|
|
525
|
|
|
|
|
|
|
=cut |
526
|
|
|
|
|
|
|
|
527
|
|
|
|
|
|
|
my %GATE_DISPOSITIONS; |
528
|
|
|
|
|
|
|
|
529
|
|
|
|
|
|
|
sub gate_disposition |
530
|
|
|
|
|
|
|
{ |
531
|
18
|
|
|
18
|
1
|
35
|
my $self = shift; |
532
|
18
|
|
|
|
|
42
|
return $GATE_DISPOSITIONS{ $self->command }; |
533
|
|
|
|
|
|
|
} |
534
|
|
|
|
|
|
|
|
535
|
|
|
|
|
|
|
=head1 AUTHOR |
536
|
|
|
|
|
|
|
|
537
|
|
|
|
|
|
|
Paul Evans |
538
|
|
|
|
|
|
|
|
539
|
|
|
|
|
|
|
=cut |
540
|
|
|
|
|
|
|
|
541
|
|
|
|
|
|
|
local $_; |
542
|
|
|
|
|
|
|
while( ) { |
543
|
|
|
|
|
|
|
chomp; |
544
|
|
|
|
|
|
|
my ( $numname, $args, $gating ) = split m/\s*\|\s*/, $_ or next; |
545
|
|
|
|
|
|
|
my ( $num, $name ) = split m/=/, $numname; |
546
|
|
|
|
|
|
|
|
547
|
|
|
|
|
|
|
my $index = 0; |
548
|
|
|
|
|
|
|
my %args = map { |
549
|
|
|
|
|
|
|
if( m/^(.*)=(.*)$/ ) { |
550
|
|
|
|
|
|
|
$index = $1; |
551
|
|
|
|
|
|
|
( $2 => $1 ) |
552
|
|
|
|
|
|
|
} |
553
|
|
|
|
|
|
|
else { |
554
|
|
|
|
|
|
|
( $_ => ++$index ); |
555
|
|
|
|
|
|
|
} |
556
|
|
|
|
|
|
|
} split m/,/, $args; |
557
|
|
|
|
|
|
|
|
558
|
|
|
|
|
|
|
$NUMERIC_NAMES{$num} = $name; |
559
|
|
|
|
|
|
|
$ARG_NAMES{$num} = \%args; |
560
|
|
|
|
|
|
|
$GATE_DISPOSITIONS{$num} = $gating if defined $gating; |
561
|
|
|
|
|
|
|
} |
562
|
|
|
|
|
|
|
close DATA; |
563
|
|
|
|
|
|
|
|
564
|
|
|
|
|
|
|
0x55AA; |
565
|
|
|
|
|
|
|
|
566
|
|
|
|
|
|
|
# And now the actual numeric definitions, given in columns |
567
|
|
|
|
|
|
|
# number=NAME | argname,argname,argname |
568
|
|
|
|
|
|
|
|
569
|
|
|
|
|
|
|
# arg may be position=argname |
570
|
|
|
|
|
|
|
|
571
|
|
|
|
|
|
|
# See also |
572
|
|
|
|
|
|
|
# http://www.alien.net.au/irc/irc2numerics.html |
573
|
|
|
|
|
|
|
|
574
|
|
|
|
|
|
|
__DATA__ |