r1784@llin: dpavlin | 2009-04-22 12:14:51 +0200

 implement pager using Data::Page

git-svn-id: svn+ssh://mjesec/home/dpavlin/svn/webpac2/trunk@1138 07558da8-63fa-0310-ba24-9fe276d99e06

diff --git a/vhost/webpac2.cgi b/vhost/webpac2.cgi
index c8e6d3e..7b18776 100755 (executable)
--- a/vhost/webpac2.cgi
+++ b/vhost/webpac2.cgi
@@ -8,6 +8,11 @@ use CGI::Carp qw/fatalsToBrowser/;
 use File::Slurp;
 use YAML;
 use Search::Estraier;
+use Data::Page;
+use Data::Dump qw/dump/;
+
+my $range_around = 5;
+my $entries_per_page = 30;
 
 print header;
 
@@ -16,6 +21,38 @@ sub dump_yaml {
        print qq|<pre># $name\n|, YAML::Dump( @_ ), qq|</pre>|;
 }
 
+sub show_pages {
+       my ($pager,$coderef) = @_;
+
+       my @show_pages;
+       my $after_current = 0;
+
+       if ( $pager->current_page <= $range_around + 2 ) {
+               @show_pages = ( $pager->first_page .. $pager->current_page );
+               $after_current = $range_around - $pager->current_page;
+       } else {
+               @show_pages = ( $pager->first_page, '', $pager->current_page - $range_around .. $pager->current_page );
+       }
+
+       if ( $pager->current_page + $range_around + 1 >= $pager->last_page ) {
+               push @show_pages, ( $pager->current_page + 1 .. $pager->last_page );
+       } else {
+               push @show_pages, ( $pager->current_page + 1 .. $pager->current_page + $after_current + $range_around, '', $pager->last_page );
+       }
+
+       warn "## show_pages = ",dump( @show_pages );
+
+       return join( ' ', map {
+               if ( $_ == $pager->current_page ) {
+                       qq|<b>$_</b>|;
+               } elsif ( $_ eq '' ) {
+                       qq|...|;
+               } else {
+                       $coderef->( $_ );
+               }
+       } @show_pages );
+}
+
 my $path = $ENV{PATH_INFO} || 'ecas';
 my $dir = $0;
 $dir =~ s{/[^/]+.cgi}{};
@@ -54,7 +91,9 @@ print
 #                      -linebreak => 0,
                ),
                textfield( -name => 'search' ),
-               submit
+               submit,
+               textfield( -name => 'entries_per_page', -default => $entries_per_page ),
+               textfield( -name => 'current_page', -default => 1 ),
 ;
 
 print  end_form;
@@ -68,18 +107,39 @@ if ( my $search = param('search') ) {
                croak_on_error => 1,
        );
 
+       param( 'entries_per_page', $entries_per_page ) unless param('entries_per_page'); # FIXME not needed?
+
        my $cond = Search::Estraier::Condition->new;
        $cond->set_phrase( $search );
+       $cond->set_skip( param('current_page') );
+       $cond->set_max( param('entries_per_page') );
        my $nres = $node->search( $cond, 0 );
 
+       my $pager = Data::Page->new( $nres->hits, param('entries_per_page'), param('current_page') );
+
        if ( ! $nres ) {
                my $no_results = "No results for search '%s'";
                printf qq|<div class="error">$no_results</div>|, $search;
        } else {
+
                my $results = "Got %d results for search '%s'";
                printf qq|<div class="message">$results</div>|, $nres->hits, $search;
 
-               print qq|<ol>|;
+               print
+                       qq|<div class=pager>|,
+                       show_pages( $pager,
+                               sub {
+                                       my ($page) = @_;
+                                       param( 'current_page', $page );
+                                       my $url = self_url( -query => 1 );
+                                       qq|<a href="$url">$_</a>|;
+                               }
+                       ),
+                       qq|</div>|
+               ;
+
+               my $start = $pager->first;
+               print qq|<ol start=$start>|;
 
                foreach my $i ( 1 .. $nres->doc_num ) {
                        my $rdoc = $nres->get_doc( $i - 1 );
@@ -101,6 +161,9 @@ if ( my $search = param('search') ) {
                print qq|</ol>|;
        }
        print qq|</div>|;
+
+       dump_yaml( 'pager', $pager );
+
 }
 
 dump_yaml( 'estraier', $estraier );