Raw content of LRG::Node
<![CDATA[use strict;
use warnings;
package LRG;
use XML::Writer;
use IO::File;
use Data::Dumper;
# ROOT OBJECT
#############
package LRG::LRG;
# constructor
sub new {
my $file = shift if @_;
my $lrg;
if(defined $file) {
# get an IO object for the file
my $output = new IO::File(">$file") or die "Could not write to file $file\n";
# initialise the XML::Writer object
# the last two parameters ensure pretty formatting when the file is written
$lrg->{'xml'} = new XML::Writer(OUTPUT => $output, DATA_INDENT => 2, DATA_MODE => 1);
}
else {
$lrg->{'xml'} = new XML::Writer(DATA_INDENT => 2, DATA_MODE => 1);
}
# initialise the nodes array
$lrg->{'nodes'} = ();
# give this root node a name for completeness' sake
$lrg->{'name'} = 'LRG_ROOT_NODE';
# bless and return
bless $lrg, 'LRG::LRG';
return $lrg;
}
# constructor reads XML from file
sub newFromFile {
my $file = shift;
my $outfile = shift if @_;
# create a new LRG root - this can be a specific file
# or just a temporary file if one is not specified
my $lrg = LRG::LRG::new(defined $outfile ? $outfile : undef);
# set the current node to the root
my $current = $lrg;
my $name;
# open the file
open IN, $file or die("Could not read from file $file\n");
# initiate a blank string to hold the XML
my $xml_string = '';
# read in the file
while(<IN>) {
chomp;
# lose leading/trailing whitespace
s/^\s+//g;
s/\s+$//g;
# ignore comment lines
next if /^\<\?/;
$xml_string .= $_;
}
close IN;
# get rid of newline and carriage return characters
$xml_string =~ s/\r+//g;
$xml_string =~ s/\n+//g;
my $prev_end = 0;
# loop through XML tags sequentially
while($xml_string =~ m/<.+?>/g) {
# get the matched string and details about it
my $string = $&;
my $length = length($string);
my $pos = pos($xml_string);
my $start = $pos - $length;
my $end = $pos;
# this code searches for content between tags
if($prev_end >= 1 && $start - $prev_end > 1) {
# get substring from the XML string
my $temp = substr($xml_string, $prev_end, ($start - $prev_end));
# check that it contains word characters
if($temp =~ /\w+/) {
# add content to the current node
$current->content($temp);
}
}
# reset the prev_end variable
$prev_end = $end;
# get rid of tag open/close characters
$string =~ s/\<|\>//g;
# if this is a closing tag, point current to this node's parent
if($string =~ /^\//) {
$current = $current->parent;
}
# otherwise this is an opening or empty tag
else {
# split by whitespace
my @split = split /\s+/, $string;
# the name of the tag is the first element
$name = shift @split;
# if there are more elements, assume these are additional
# key/value pairs to be added
if(scalar @split) {
# join
$string = join " ", @split;
# change " = " to "="
$string =~ s/\s*\=\s*/\=/;
# re-split by space or =
@split = split /\s+|\=/, $string;
# create a new hash
my %data = ();
# iterate through remaining elements
while(@split) {
# get key/value pair
my $key = shift @split;
my $val = shift @split;
# remove "s and 's as these are converted to HTML form
# by XML::Writer
$val =~ s/\"|\'//g;
# remove trailing / if it's an empty tag
$val =~ s/\/$//g;
# add the data to the hash
$data{$key} = $val;
}
# if this is an empty tag (ends with a "/")
if($string =~ /\/$/) {
$current = $current->addEmptyNode($name, \%data);
# reset current to this node's parents
$current = $current->parent;
}
# if this is a normal opening tag
else {
$current = $current->addNode($name, \%data);
}
}
# no extra data elements to add
else {
# if this is an empty tag (ends with a "/")
if($string =~ /\/$/) {
$current = $current->addEmptyNode($name);
# reset current node to this node's parents
$current = $current->parent;
}
# if this is a normal opening tag
else {
$current = $current->addNode($name);
}
}
}
}
# return
return $lrg;
}
# add node
sub addNode {
my $self = shift;
my $name = shift;
if($name =~ /\//) {
return $self->addNodeMulti($name);
}
# look for an additional arg containing
# data to be written in the tag itself
my $data = shift if @_;
# check that the data sent is a hash
if(scalar keys %{$data}) {
push @{$self->{'nodes'}}, LRG::Node::new($name, $self->{'xml'}, $data);
}
# otherwise assume no data
else {
push @{$self->{'nodes'}}, LRG::Node::new($name, $self->{'xml'});
}
(@{$self->{'nodes'}})[-1]->{'parent'} = $self;
# return the last node added (i.e. this one)
return (@{$self->{'nodes'}})[-1];
}
sub addEmptyNode {
my $self = shift;
my $name = shift;
# look for an additional arg containing
# data to be written in the tag itself
my $data = shift if @_;
# check that the data sent is a hash
if(scalar keys %{$data}) {
push @{$self->{'nodes'}}, LRG::Node::newEmpty($name, $self->{'xml'}, $data);
}
# otherwise assume no data
else {
push @{$self->{'nodes'}}, LRG::Node::newEmpty($name, $self->{'xml'});
}
(@{$self->{'nodes'}})[-1]->{'parent'} = $self;
# return the last node added (i.e. this one)
return (@{$self->{'nodes'}})[-1];
}
# add a ready-created node to this node
sub addExisting() {
my $self = shift;
my $new_node = shift;
$new_node->{'parent'} = $self;
#if(!defined $new_node->xml) {
$new_node->xml($self->xml) if defined $self->xml;
#}
push @{$self->{'nodes'}}, $new_node;
}
# add multiple embedded nodes
sub addNodeMulti() {
my $self = shift;
my $name = shift;
my @levels = split /\s*\/\s*/, $name;
# if only one level given, do a normal addNode
if(scalar @levels == 1) {
return $self->addNode($name);
}
else {
my $current = $self;
while(@levels) {
my $level = shift @levels;
if(scalar @levels >= 1) {
$current = $current->addNode($level);
}
else {
return $current->addNode($level);
}
}
}
}
# find node
sub findNode {
my $self = shift;
my $name = shift;
my $data = shift if @_;
# do a multi find if the name is delimited with "/"s
return $self->findNodeMulti($name, $data) if $name =~ /\//;
my $found;
my $match;
# look through the nodes
foreach my $node(@{$self->{'nodes'}}) {
# if the name matches
if(defined $node->name && defined $name && $node->name eq $name) {
$match = 1;
# if we are comparing data too
if(scalar keys %$data && scalar keys %{$node->data}) {
$match = 0;
my $needed = scalar keys %$data;
foreach my $key(keys %$data) {
next unless defined $node->data->{$key};
$match++ if $node->data->{$key} eq $data->{$key};
}
$match = ($match == $needed ? 1 : 0);
}
if($match) {
$found = $node;
last;
}
}
last if defined $found;
# look recursively in any sub-nodes if not found
$found = $node->findNode($name, $data);
}
return $found;
}
# find node given multiple levels
sub findNodeMulti {
my $self = shift;
my $name = shift;
my $data = shift if @_;
my @levels = split /\s*\/\s*/, $name;
# if only one level given, do a normal findNode
if(scalar @levels == 1) {
return $self->findNode($name, $data);
}
else {
my $current = $self;
while(@levels) {
my $level = shift @levels;
if(scalar @levels >= 1) {
$current = $current->findNode($level);
}
else {
$current = $current->findNode($level, $data);
}
}
return $current;
}
}
# find or create a node if it doesn't exist
sub findOrAdd() {
my $self = shift;
my $name = shift;
my $find = $self->findNode($name);
if(defined $find) {
return $find;
}
else {
return $self->addNode($name);
}
}
# compare a node with another
#sub compare {
# my $self = shift;
# my $comp = shift;
#
# my $match;
#
# # if the name matches
# if(defined $node->name && defined $name && $node->name eq $name) {
#
# $match = 1;
#
# # if we are comparing data too
# if(scalar keys %$data && scalar keys %{$node->data}) {
# $match = 0;
#
# my $needed = scalar keys %$data;
#
# foreach my $key(keys %$data) {
# next unless defined $node->data->{$key};
#
# $match++ if $node->data->{$key} eq $data->{$key};
# }
#
# $match = ($match == $needed ? 1 : 0);
# }
#
# if($match) {
# $found = $node;
# last;
# }
# }
#}
# print node
sub printNode {
my $self = shift;
# if this is an empty tag
# e.g. <mytag data1="value" />
if($self->empty) {
if(scalar keys %{$self->data}) {
$self->{'xml'}->emptyTag($self->name, %{$self->data});
}
else {
$self->{'xml'}->emptyTag($self->name);
}
}
# if there is data for this node print like
# e.g. <mytag data1="value">
elsif(scalar keys %{$self->data}) {
$self->{'xml'}->startTag($self->name, %{$self->data});
}
# otherwise just open the bare tag
# e.g. <mytag>
else {
$self->{'xml'}->startTag($self->name);
}
if(defined $self->{'content'}) {
#foreach my $item(@{$node->{'content'}}) {
$self->{'xml'}->characters($self->content);
#}
}
# recursive iteration
foreach my $node(@{$self->{'nodes'}}) {
$node->printNode();
}
# end the tag
$self->{'xml'}->endTag() unless $self->{'empty'};
}
# print all
sub printAll {
my $self = shift;
# required to open the XML doc
$self->{'xml'}->xmlDecl('UTF-8');
$self->{'xml'}->pi('xml-stylesheet', 'type="text/xsl href="lrg2html.xsl"');
# iterate through the nodes recursively
foreach my $node(@{$self->{'nodes'}}) {
$node->printNode();
}
# finish and write the file
$self->{'xml'}->end();
}
# getter/setter for name
sub name {
my $self = shift;
$self->{'name'} = shift if @_;
return $self->{'name'};
}
# get parent node
sub parent {
my $self = shift;
return $self->{'parent'} if defined $self->{'parent'};
}
# getter/setter for data
sub data {
my $self = shift;
$self->{'data'} = shift if @_;
return $self->{'data'};
}
# getter/setter for empty status
sub empty {
my $self = shift;
$self->{'empty'} = shift if @_;
return $self->{'empty'};
}
# getter/setter for content
sub content() {
my $self = shift;
$self->{'content'} = shift if @_;
return $self->{'content'};
}
# getter/setter for this node's position in the array order
sub position() {
my $self = shift;
my $to = shift if @_;
# if a new position specified, use the moveTo() subroutine
$self->moveTo($to) if defined $to;
my $pos;
for my $i(0..(scalar @{$self->parent->{'nodes'}} - 1)) {
if($self eq $self->parent->{'nodes'}->[$i]) {
$pos = $i;
last;
}
}
return $pos;
}
# move a node to a specific position in the array
# NB shunts all others down one so any pos need
# to be recalculated
sub moveTo() {
my $self = shift;
my $num = (@_ ? shift : 1);
#$num--;
my $pos = $self->position();
# copy the nodes array to @nodes
my @nodes = @{$self->parent->{'nodes'}};
# find out the highest index of the array
my $last_index = $#nodes;
# if num is out of range
#$num = $last_index + 1 if $num > $last_index + 1;
# get the before and after arrays:
# (..@before..)*(..@after..)
# --------------------------
# where * is self
my @before = ($pos - 1 >= 0 ? @nodes[0..($pos-1)] : ());
my @after = ($pos + 1 <= $last_index ? @nodes[($pos+1)..$last_index] : ());
# put them back together and recalc the last index
@nodes = (@before, @after);
$last_index = $#nodes;
# chop into two again, only this time get all
# since this array doesn't include self:
# (..@before..)(..@after..)
# -------------------------
@before = ($num - 1 >= 0 ? @nodes[0..($num-1)] : ());
@after = ($num <= $last_index ? @nodes[$num..$last_index] : ());
# create a new array with self inserted in its new position
@nodes = (@before, $self, @after);
# copy the new array into the parent's structure
$self->parent->{'nodes'} = \@nodes;
}
# count the number of nodes
sub countNodes() {
my $self = shift @_;
return scalar @{$self->parent->{'nodes'}};
}
# get content from STDIN given a list of fields
sub requestContent() {
my $self = shift;
my $input;
foreach my $item(@_) {
print "Input $item \>";
$input = <STDIN>;
chomp $input;
$self->addNode($item)->content($input);
}
}
# get current date in a nice format
sub date() {
my @time = localtime(time());
$time[4]++;
# add leading zeroes as required
for my $i(0..4) {
$time[$i] = "0".$time[$i] if $time[$i] < 10;
}
my $time = ($time[5] + 1900)."-".$time[4]."-".$time[3];
return $time;
}
# getter/recursive setter for the XML object
sub xml() {
my $self = shift;
my $xml = shift if @_;
if(defined $xml) {
$self->{'xml'} = $xml;
foreach my $node(@{$self->{'nodes'}}) {
$node->xml($xml);
}
}
return $self->{'xml'};
}
# fetch sequences using pfetch
sub pfetch() {
my $self = shift;
my $id = shift;
my $sequence;
open IN, "pfetch $id |";
while(<IN>) {
next if /^\>/;
chomp;
$sequence .= $_;
}
close IN;
return $sequence;
}
# NODE
######
package LRG::Node;
# inherit some functions from root LRG
our @ISA = "LRG::LRG";
sub new {
my $name = shift;
if($name =~ /\:\:/) {
$name = shift;
}
my $xml = shift if @_;
# look for an additional arg containing
# data to be written in the tag itself
my $data = shift if @_;
my @nodes = ();
my %node = ();
my $node_ref = \%node;
$node{'name'} = $name;
$node{'nodes'} = \@nodes;
$node{'xml'} = $xml if defined $xml;
$node{'data'} = (scalar keys %{$data} ? $data : {});
$node{'empty'} = 0;
bless $node_ref, 'LRG::Node';
return $node_ref;
}
sub newEmpty {
my $name = shift;
my $xml = shift;
my $data = shift if @_;
my $node;
if(scalar keys %{$data}) {
$node = LRG::Node::new($name, $xml, $data);
}
else {
$node = LRG::Node::new($name, $xml);
}
$node->{'empty'} = 1;
return $node;
}
1;
]]>