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package WebPAC::Tree; |
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|
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use warnings; |
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use strict; |
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|
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use Carp; |
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use Log::Log4perl qw(get_logger :levels); |
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use YAML; |
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use Template; |
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|
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=head1 NAME |
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|
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WebPAC::Tree - create tree from lookup data |
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|
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=head1 DESCRIPTION |
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|
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This module will create tree from lookup data. It requires quite complicated |
| 18 |
data structure, but once you get hang of that, it's peace of cake :-) |
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|
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Data structure for tree definition is non-recursive, and defines each level |
| 21 |
of tree individually (so you can limit depth of tree) like this: |
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|
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my $l = $webpac->{'lookup'}; |
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|
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my @tree = ({ |
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# level 0 |
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code_arr => sub { @{$_[0]} }, |
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filter_code => sub { shift }, |
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lookup_v900 => sub { |
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my ($c,$p) = @_; |
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$p =~ s/^a:(..:....):.*$/$1/; |
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return "a:".$p.":".$c; |
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}, |
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lookup_term => sub { shift @{$l->{"d:".$_[0]}} }, |
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lookup_mfn => sub { shift @{$l->{"900_mfn:".$_[0]}} }, |
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have_children => sub { return $l->{$_[1]} }, |
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iframe => 1, |
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},{ |
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# level 1 |
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code_arr => sub { @{$_[0]} }, |
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filter_code => sub { shift }, |
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lookup_v900 => sub { |
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my ($c,$p) = @_; |
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$p =~ s/^a:(..:....):.*$/$1/; |
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return "a:".$p.":".$c; |
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}, |
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lookup_term => sub { shift @{$l->{"d:".$_[0]}} }, |
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lookup_mfn => sub { shift @{$l->{"900_mfn:".$_[0]}} }, |
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have_children => sub { 0 }, |
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style => 'display: none', |
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)}; |
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|
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You can, however, create recursion with C<have_children_at_level> discussed |
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below, but you loose ability to limit tree depth or to specify different |
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style for each level. |
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|
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Documentation for each element of tree is little sparse, but here it is: |
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|
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=over 5 |
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|
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=item code_arr |
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|
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Called once for each level. |
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|
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@mfns = $t->{'code_arr'}->($start_code); |
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|
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Returns codes for this level. |
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|
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=item filter_code |
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|
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Optional function (which can be replaced by C<shift>) to filter which codes |
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are displayed. |
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|
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$t->{'filter_code'}->($code); |
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|
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Returns code or C<false> if code has to be skipped. |
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|
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=item lookup_v900 |
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|
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Lookup value which will be called C<$v900> from now on. |
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|
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my $v900 = $t->{'lookup_v900'}->($code); |
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|
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=item lookup_term |
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|
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Lookup term value, displayed as name of tree element. |
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|
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my $term = $t->{'lookup_term'}->($code,$v900); |
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|
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=item lookup_mfn |
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|
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Lookup mfn value, used to create hyperlink from tree. |
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|
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my $mfn = $t->{'lookup_mfn'}->($code,$v900); |
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|
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=item have_children |
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|
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Returns children for next iteration of tree generation or undef. |
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|
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my $next_lvl = $t->{'have_children'}->($code,$v900); |
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|
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=item have_children_at_level |
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|
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Returns children for next iteration and next level. |
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|
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my ($level,$next_lvl) = $t->{'have_children_at_level'}->($code,$v900); |
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|
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It's safe to return undef just for next level data (C<$next_lvl> in example |
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above) to stop recursion. |
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|
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=item iframe |
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|
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This optional option will create all children nodes in separate file, and iframe in tree html, |
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so that generated tee html will have resonable size with large number of nodes. |
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|
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=item style |
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|
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Optional option to specify style of this node. |
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|
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=back |
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|
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=head1 METHODS |
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|
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=head2 new |
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|
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Create new tree object |
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|
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my $tree = new WebPAC::Tree( |
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tree => \@tree, |
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log => 'log4perl.conf', |
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detail_url => sub { |
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my $mfn = shift; |
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my $path = "thes/${mfn}.html"; |
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return $path if (-e "./out/$path"); |
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}, |
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nodes_dir => 'nodes', |
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); |
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|
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C<tree> is tree array with levels of tree described above. |
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|
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C<log> is optional parametar which specify filename of L<Log::Log4Perl> |
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config file. Default is C<log.conf>. |
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|
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C<detail_url> code ref to check if detail html exists (and return URL if |
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it does). |
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|
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C<nodes_dir> is relative path from output directory where tree nodes for |
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iframes will be created. |
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|
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=cut |
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|
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sub new { |
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my $class = shift; |
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my $self = {@_}; |
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bless($self, $class); |
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|
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my $log_file = $self->{'log'} || "log.conf"; |
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Log::Log4perl->init($log_file); |
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|
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my $log = $self->_get_logger(); |
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|
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$log->logconfess("need tree") unless ($self->{'tree'}); |
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|
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$self->{'show_ids'} = []; |
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$self->{'hide_ids'} = []; |
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|
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# figure out relative URL to other content from nodes_dir |
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my $iframe_base = $self->{'nodes_dir'}; |
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if ($iframe_base) { |
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$iframe_base = s#[^/]*##g; |
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$iframe_base = '../' x ( length($iframe_base) ); |
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$self->{'iframe_base'} = $iframe_base; |
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$log->debug("nodes dir is '",$self->{'nodes_dir'},"' so iframe_base is '",$self->{'iframe_base'},"'"); |
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} |
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|
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$self->{'tree_html'} = $self->unroll(0,()); |
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|
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if (! $self->{'tree_html'}) { |
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$log->warn("no html generated by unroll..."); |
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return; |
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} |
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|
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return $self; |
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} |
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|
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=head2 output |
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|
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Create output files from tree object |
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|
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$tree->output( |
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dir => './out', |
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html => 'browse.html', |
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template_dir => './output_template/', |
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template_tree => 'tree.tt', |
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template_node => 'node.tt', |
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js => 'tree-ids.js', |
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); |
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|
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C<dir> is output directory in which html files and JavaScript files will be |
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created (think of it as C<public_html>). |
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|
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C<html> is name of output html file. |
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|
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C<template_dir> is directory with Template Toolkit templates. |
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|
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C<template_tree> is name of template to produce tree. |
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|
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C<template_node> is (optional) name of template for node (if C<iframe> |
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options is used within tree definition). |
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|
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C<js> is name of JavaScript file with shown and hidden ids. |
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|
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=cut |
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|
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sub output { |
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my $self = shift; |
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|
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my $args = {@_}; |
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|
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my $log = $self->_get_logger(); |
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|
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foreach my $p (qw(dir html template_dir template_tree js)) { |
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$log->logconfess("need $p") unless ($args->{$p}); |
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} |
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|
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my $html = $self->{'tree_html'}; |
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unless ($html) { |
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$log->warn("no html, output aborted"); |
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return; |
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} |
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|
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my $html_file = $args->{'dir'}.'/'.$args->{'html'}; |
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|
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$log->debug("templates are in ",$args->{'template_dir'}); |
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|
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my $tt = Template->new( |
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INCLUDE_PATH => $args->{'template_dir'}, |
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); |
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|
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my $var = { |
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js => $args->{'dir'}.'/'.$args->{'js'}, |
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tree => $html, |
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}; |
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|
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$log->info("creating '$html_file' with tree from ",$args->{'template_tree'}); |
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|
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$tt->process($args->{'template_tree'}, $var, $html_file) || $log->logdie("template error: ",$tt->error()); |
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|
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my $js_file = $args->{'dir'}."/".$args->{'js'}; |
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$log->info("creating '$js_file' with tree data"); |
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$self->generate_js( |
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file => $js_file, |
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); |
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|
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if (! $self->{'nodes_dir'}) { |
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$log->warn("skipping node creation"); |
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return $self; |
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} |
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|
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foreach my $mfn (keys %{$self->{'node_html'}}) { |
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|
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my $html_file = $args->{'dir'}."/".$self->{'nodes_dir'}."/${mfn}.html"; |
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|
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$log->debug("creating tree node $html_file"); |
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|
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$var = { |
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node => $self->{'node_html'}->{$mfn}, |
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}; |
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|
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$tt->process($args->{'template_node'}, $var, $html_file) || $log->logdie("template error: ",$tt->error()); |
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} |
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|
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return $self; |
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} |
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|
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=head2 unroll |
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|
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Generate tree recursively. |
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|
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my $html = $tree->unroll($level,$data_arr); |
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|
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=cut |
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|
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sub unroll { |
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my $self = shift; |
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|
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my ($level,$data_arr, $base_path) = @_; |
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|
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$base_path ||= ''; |
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|
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my $log = $self->_get_logger(); |
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|
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if (! defined($level)) { |
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$log->warn("level is undef, stoping recursion..."); |
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return; |
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} |
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|
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my $next_level = $level + 1; |
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|
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$log->logconfess("need level") unless (defined($level)); |
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#$log->logconfess("need data_arr") unless (defined($data_arr)); |
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|
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my $tree = $self->{'tree'}; |
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|
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$log->logconfess("tree is not defined") unless (defined($tree)); |
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|
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# all levels passed? |
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return if (! defined($tree->[$level])); |
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|
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$log->debug("unroll level $level base path ",($base_path || "none")); |
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|
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my $html; |
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|
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foreach my $code ($tree->[$level]->{'code_arr'}->($data_arr)) { |
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|
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if ($code = $tree->[$level]->{'filter_code'}->($code)) { |
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|
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$log->debug("# $level filter passed code $code"); |
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|
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my $v900 = $tree->[$level]->{'lookup_v900'}->($code) || $log->warn("can't lookup_v900($code)") && return; |
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$log->debug("# $level lookup_v900($code) = $v900"); |
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|
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my $term = $tree->[$level]->{'lookup_term'}->($code,$v900) || $log->warn("can't lookup_term($code,$v900)") && next; |
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$log->debug("# $level lookup_term($code,$v900) = $term"); |
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|
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my $mfn = $tree->[$level]->{'lookup_mfn'}->($code,$v900) || $log->warn("can't lookup_mfn($code,$v900)") && next; |
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$log->debug("# $level lookup_mfn($code,$v900) = $mfn"); |
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|
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$log->debug("$code -> $v900 : $term [$mfn]"); |
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|
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my ($link_start,$link_end) = ('',''); |
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|
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my $have_children = $tree->[$level]->{'have_children'}->($code,$v900); |
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|
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if (! $have_children) { |
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$log->debug("# $level doesn't have_children($code,$v900)"); |
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($next_level,$have_children) = $tree->[$level]->{'have_children_at_level'}->($code,$v900) if ($tree->[$level]->{'have_children_at_level'}); |
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$log->debug("# $level have_children($code,$v900) on level $next_level") if ($have_children); |
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|
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} |
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|
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my $iframe = $tree->[$level]->{'iframe'}; |
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|
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if ($have_children) { |
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($link_start,$link_end) = (qq{<a href="#mfn$mfn" onClick="return toggle_display('id$mfn');">},qq{</a>}); |
| 346 |
if ($iframe) { |
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my $url = $self->{'nodes_dir'} || $log->logdie("no nodes_dir?"); |
| 348 |
$url .= "/${mfn}.html"; |
| 349 |
$link_start = qq{<a href="#mfn$mfn" onClick="iframe_load('i$mfn','$url'); return toggle_display('id$mfn');">}; |
| 350 |
} |
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} |
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|
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my $mfn_link; |
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$mfn_link = $self->{'detail_url'}->($mfn) if ($self->{'detail_url'}); |
| 355 |
|
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if ($mfn_link) { |
| 357 |
$term =~ s/ *#C# */ <img src="${base_path}img\/crovoc.png" border="0">/; |
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$html .= " " x $level . |
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qq{<li>${link_start}<span id="o$mfn">${term}</span>${link_end}}. |
| 360 |
qq{ <a href="${base_path}${mfn_link}" onClick="javascript:return popup(this);"><img src="${base_path}img/listic.png" border="0"></a></li>\n}; |
| 361 |
$log->debug("linked details to $mfn_link"); |
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} else { |
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$log->warn("file 'out/$mfn_link' doesn't exist, skipping"); |
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} |
| 365 |
|
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# save mfn for iframe |
| 367 |
push @{$self->{'mfn_arr'}}, $mfn; |
| 368 |
|
| 369 |
unless ($have_children) { |
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next; |
| 371 |
} |
| 372 |
my $style = $tree->[$level]->{'style'}; |
| 373 |
|
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$html .= " " x $level . |
| 375 |
qq{<ul id="id$mfn"}. |
| 376 |
($style ? ' style="'.$style.'"' : ''). |
| 377 |
qq{>\n}; |
| 378 |
|
| 379 |
if ($style) { |
| 380 |
if ($style =~ m/display\s*:\s*none/i) { |
| 381 |
push @{$self->{'hide_ids'}}, "id$mfn"; |
| 382 |
} else { |
| 383 |
push @{$self->{'show_ids'}}, "id$mfn"; |
| 384 |
} |
| 385 |
} else { |
| 386 |
# default: show |
| 387 |
push @{$self->{'show_ids'}}, "id$mfn"; |
| 388 |
} |
| 389 |
|
| 390 |
|
| 391 |
if ($iframe) { |
| 392 |
|
| 393 |
# reset list of current mfns |
| 394 |
$self->{'mfn_arr'} = (); |
| 395 |
|
| 396 |
# unroll to separate file |
| 397 |
$self->{'node_html'}->{$mfn} = $self->unroll($next_level, $have_children, $self->{'iframe_base'}); |
| 398 |
$html .= " " x $level . |
| 399 |
qq{<iframe id="i$mfn" name="i$mfn" width="100%" height="0" frameborder="0" border="0" onLoad="iframe_resize(this.name);"></iframe>}; |
| 400 |
@{$self->{'iframe_mfn'}->{$mfn}} = @{$self->{'mfn_arr'}}; |
| 401 |
|
| 402 |
} else { |
| 403 |
# unroll at base HTML |
| 404 |
$html .= $self->unroll($next_level, $have_children, $base_path); |
| 405 |
} |
| 406 |
|
| 407 |
$html .= " " x $level . qq{</ul>\n}; |
| 408 |
|
| 409 |
} |
| 410 |
} |
| 411 |
return $html; |
| 412 |
} |
| 413 |
|
| 414 |
=head2 generate_js |
| 415 |
|
| 416 |
Generate JavaScript arrays C<show> and C<hide> used to toggle display of |
| 417 |
elements. |
| 418 |
|
| 419 |
$tree->generate_js( |
| 420 |
file = "./out/tree-ids.js", |
| 421 |
); |
| 422 |
|
| 423 |
=cut |
| 424 |
|
| 425 |
sub generate_js { |
| 426 |
my $self = shift; |
| 427 |
|
| 428 |
my $args = {@_}; |
| 429 |
|
| 430 |
my $log = $self->_get_logger(); |
| 431 |
|
| 432 |
my $js_file = $args->{'file'}; |
| 433 |
$log->die("need file") unless ($args->{'file'}); |
| 434 |
|
| 435 |
$log->info("creating '$js_file' with arrays of shown and hidden ids"); |
| 436 |
|
| 437 |
open(JS, ">", $js_file) || $log->logdie("can't open '$js_file': $!"); |
| 438 |
print JS "var show = ['",join("','",@{$self->{'show_ids'}}),"'];\n"; |
| 439 |
print JS "var hide = ['",join("','",@{$self->{'hide_ids'}}),"'];\n"; |
| 440 |
|
| 441 |
print JS "var mfn_iframe = [\n"; |
| 442 |
foreach my $if (keys %{$self->{'iframe_mfn'}}) { |
| 443 |
# print JS " ",join(",",map { "[$_:$if]" } @{$self->{'iframe_mfn'}->{$if}}),",\n"; |
| 444 |
} |
| 445 |
print JS " null\n]\n"; |
| 446 |
|
| 447 |
close(JS); |
| 448 |
|
| 449 |
$log->debug("stored ",scalar @{$self->{'show_ids'}}," shown and ",scalar @{$self->{'hide_ids'}}," hidden elements"); |
| 450 |
|
| 451 |
} |
| 452 |
|
| 453 |
# |
| 454 |
|
| 455 |
=head1 INTERNAL METHODS |
| 456 |
|
| 457 |
You shouldn't call this methods directly. |
| 458 |
|
| 459 |
=head2 _get_logger |
| 460 |
|
| 461 |
Get C<Log::Log4perl> object with a twist: domains are defined for each |
| 462 |
method |
| 463 |
|
| 464 |
my $log = $webpac->_get_logger(); |
| 465 |
|
| 466 |
=cut |
| 467 |
|
| 468 |
sub _get_logger { |
| 469 |
my $self = shift; |
| 470 |
|
| 471 |
my $name = (caller(1))[3] || caller; |
| 472 |
return get_logger($name); |
| 473 |
} |
| 474 |
|
| 475 |
1; |
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