IkiWiki/Plugin/pagestats.pm



#!/usr/bin/perl
#
# Produce page statistics in various forms.
#
# Currently supported:
#   cloud: produces statistics in the form of a del.icio.us-style tag cloud
#          (default)
#   table: produces a table with the number of backlinks for each page
#
# by Enrico Zini
package IkiWiki::Plugin::pagestats;

use warnings;
use strict;
use IkiWiki;

# Names of the HTML classes to use for the tag cloud
our @classes = ('smallestPC', 'smallPC', 'normalPC', 'bigPC', 'biggestPC' );

sub import { #{{{
    IkiWiki::hook(type => "preprocess", id => "pagestats",
        call => \&preprocess);
} # }}}

sub preprocess (@) { #{{{
    my %params=@_;
    $params{pages}="*" unless defined $params{pages};
    my $style = ($params{style} or 'cloud');
    
    # Needs to update whenever a page is added or removed, so
    # register a dependency.
    IkiWiki::add_depends($params{page}, $params{pages});
    
    my %counts;
    my $max = 0;
    foreach my $page (keys %IkiWiki::links) {
        if (IkiWiki::pagespec_match($page, $params{pages})) {
            my @bl = IkiWiki::backlinks($page);
            $counts{$page} = scalar(@bl);
            $max = $counts{$page} if $counts{$page} > $max;
        }
    }

    if ($style eq 'table') {
        return "<table class='pageStats'>\n".
            join("\n", map {
                "<tr><td>".
                IkiWiki::htmllink($params{page}, $params{destpage}, $_, 1).
                "</td><td>".$counts{$_}."</td></tr>"
            }
            sort { $counts{$b} <=> $counts{$a} } keys %counts).
            "\n</table>\n" ;
    } else {
        # In case of misspelling, default to a page cloud

        my $res = "<div class='pagecloud'>\n";
        foreach my $page (sort keys %counts) {
            my $class = $classes[$counts{$page} * scalar(@classes) / ($max + 1)];
            $res .= "<span class=\"$class\">".
                    IkiWiki::htmllink($params{page}, $params{destpage}, $page).
                    "</span>\n";
        }
        $res .= "</div>\n";

        return $res;
    }
} # }}}

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