package Pear::LocalLoop::Plugin::BootstrapPagination;

# nabbed from Mojolicious::Plugin::BootstrapPagination -
# https://github.com/csroli/Mojolicious-Plugin-BootstrapPagination
use Mojo::Base 'Mojolicious::Plugin';
use POSIX(qw/ceil/);
use Mojo::ByteStream 'b';

use strict;
use warnings;

our $VERSION = "0.14";

# Homer: Well basically, I just copied the plant we have now.
#        Then, I added some fins to lower wind resistance.
#        And this racing stripe here I feel is pretty sharp.
# Burns: Agreed.  First prize!
sub register {
    my ( $self, $app, $args ) = @_;
    $args ||= {};

    $app->helper(
        bootstrap_pagination => sub {
            my ( $self, $actual, $count, $opts ) = @_;
            my %bs4classes =
              ( list_class => "page-item", anchor_class => "page-link" );

            my $localize =
                ( $opts->{localize} || $args->{localize} )
              ? ( $opts->{localize} || $args->{localize} )
              : undef;

            $count = ceil($count);
            return "" unless $count > 1;
            $opts = {} unless $opts;
            my $round = $opts->{round}      || $args->{round}      || 4;
            my $param = $opts->{param}      || $args->{param}      || "page";
            my $class = $opts->{class}      || $args->{class}      || "";
            my $bs4   = $opts->{bootstrap4} || $args->{bootstrap4} || undef;

            if ( $class ne "" ) {
                $class = " " . $class;
            }
            my $outer = $opts->{outer} || $args->{outer} || 2;
            my $query =
              exists $opts->{query} ? $opts->{query} : $args->{query} || "";
            my $start   = $opts->{start} // $args->{start} // 1;
            my @current = ( $actual - $round .. $actual + $round );
            my @first   = ( $start .. $start + $outer - 1 );
            my @tail    = ( $count - $outer + 1 .. $count );
            my @ret     = ();
            my $last    = undef;

            foreach my $number ( sort { $a <=> $b } @current, @first, @tail ) {
                next
                  if ( $last && $last == $number && $start > 0 )
                  || ( defined $last && $last == $number && $start == 0 );
                next
                  if ( $number <= 0 && $start > 0 )
                  || ( $number < 0 && $start == 0 );
                last
                  if ( $number > $count && $start > 0 )
                  || ( $number >= $count && $start == 0 );
                push @ret, ".." if ( $last && $last + 1 != $number );
                push @ret, $number;
                $last = $number;
            }
            my $html = "<ul class=\"pagination$class\">";
            if ( $actual == $start ) {
                $html .=
                    "<li class=\"disabled"
                  . ( $bs4 ? " " . $bs4classes{list_class} : "" ) . "\"><a"
                  . (
                    $bs4 ? " class=\"" . $bs4classes{anchor_class} . "\"" : "" )
                  . " href=\"#\" >&laquo;</a></li>";
            }
            else {
                $html .= "<li"
                  . ( $bs4 ? " class=\"" . $bs4classes{list_class} . "\"" : "" )
                  . "><a"
                  . (
                    $bs4 ? " class=\"" . $bs4classes{anchor_class} . "\"" : "" )
                  . " href=\""
                  . $self->url_with->query( [ $param => $actual - 1 ] )
                  . $query
                  . "\" >&laquo;</a></li>";
            }
            my $last_num = -1;
            foreach my $number (@ret) {
                my $show_number =
                    $start > 0
                  ? $number
                  : ( $number =~ /\d+/ ? $number + 1 : $number );

                if ($localize) {
                    $show_number = $localize->( $self, $show_number );
                }

                if ( $number eq ".." && $last_num < $actual ) {
                    my $offset = ceil( ( $actual - $round ) / 2 ) + 1;
                    $html .= "<li"
                      . (
                        $bs4 ? " class=\"" . $bs4classes{list_class} . "\""
                        : ""
                      )
                      . "><a"
                      . (
                        $bs4 ? " class=\"" . $bs4classes{anchor_class} . "\""
                        : ""
                      )
                      . " href=\""
                      . $self->url_with->query(
                        [ $param => $start == 0 ? $offset + 1 : $offset ] )
                      . $query
                      . "\" >&hellip;</a></li>";
                }
                elsif ( $number eq ".." && $last_num > $actual ) {
                    my $back   = $count - $outer + 1;
                    my $forw   = $round + $actual;
                    my $offset = ceil( ( ( $back - $forw ) / 2 ) + $forw );
                    $html .= "<li"
                      . (
                        $bs4 ? " class=\"" . $bs4classes{list_class} . "\""
                        : ""
                      )
                      . "><a"
                      . (
                        $bs4 ? " class=\"" . $bs4classes{anchor_class} . "\""
                        : ""
                      )
                      . " href=\""
                      . $self->url_with->query(
                        [ $param => $start == 0 ? $offset + 1 : $offset ] )
                      . $query
                      . "\" >&hellip;</a></li>";
                }
                elsif ( $number == $actual ) {
                    $html .=
                        "<li class=\"active"
                      . ( $bs4 ? " " . $bs4classes{list_class} : "" )
                      . "\"><span"
                      . (
                        $bs4
                        ? " class=\"" . $bs4classes{anchor_class} . "\""
                        : ""
                      ) . ">$show_number</span></li>";
                }
                else {
                    $html .= "<li"
                      . (
                        $bs4 ? " class=\"" . $bs4classes{list_class} . "\""
                        : ""
                      )
                      . "><a"
                      . (
                        $bs4 ? " class=\"" . $bs4classes{anchor_class} . "\""
                        : ""
                      )
                      . " href=\""
                      . $self->url_with->query( [ $param => $number ] )
                      . $query
                      . "\">$show_number</a></li>";
                }
                $last_num = $number;
            }
            if ( $actual == $count ) {
                $html .=
                    "<li class=\"disabled"
                  . ( $bs4 ? " " . $bs4classes{list_class} : "" ) . "\"><a"
                  . (
                    $bs4 ? " class=\"" . $bs4classes{anchor_class} . "\"" : "" )
                  . " href=\""
                  . $self->url_with->query( [ $param => $actual + 1 ] )
                  . $query
                  . "\" >&raquo;</a></li>";
            }
            else {
                $html .= "<li"
                  . ( $bs4 ? " class=\"" . $bs4classes{list_class} . "\"" : "" )
                  . "><a"
                  . (
                    $bs4 ? " class=\"" . $bs4classes{anchor_class} . "\"" : "" )
                  . " href=\""
                  . $self->url_with->query( [ $param => $actual + 1 ] )
                  . $query
                  . "\" >&raquo;</a></li>";
            }
            $html .= "</ul>";
            return b($html);
        }
    );

    return 1;
}

1;
__END__

=encoding utf-8

=head1 NAME

Mojolicious::Plugin::BootstrapPagination - Page Navigator plugin for Mojolicious
This module has derived from L<Mojolicious::Plugin::PageNavigator>

=head1 SYNOPSIS

  # Mojolicious::Lite
  plugin 'bootstrap_pagination'

  # Mojolicious
  $self->plugin( 'bootstrap_pagination' );

=head1 DESCRIPTION

L<Mojolicious::Plugin::BootstrapPagination> generates standard page navigation bar, like 
  
<<  1  2 ... 11 12 13 14 15 ... 85 86 >>

=head1 HELPERS

=head2 bootstrap_pagination

  %= bootstrap_pagination( $current_page, $total_pages, $opts );

=head3 Options

Options is a optional ref hash.

  %= bootstrap_pagination( $current_page, $total_pages, {
      round => 4,
      outer => 2,
      query => "&id=$id",
      start => 1,
      class => 'pagination-lg',
      param => 'page' } );

=over 1

=item round

Number of pages around the current page. Default: 4.

=item outer

Number of outer window pages (first and last pages). Default 2.

=item param

Name of param for query url. Default: 'page'

=item query

Additional query string to url. Optional.

=item start

Start number for query string. Default: 1. Optional.

=back

=head1 INTERNATIONALIZATION

If you want to use internationalization (I18N), you can pass a code reference via I<localize>.

  plugin 'bootstrap_pagination' => {
    localize => \&localize,
  };
  
  sub localize {
    my ($number) = @_;
  
    my %trans = (
      1 => 'one',
      2 => 'two',
      6 => 'six',
      7 => 'seven',
      8 => 'eight',
      9 => 'nine',
     10 => 'ten',
     11 => 'eleven',
     12 => 'twelve',
     13 => 'thirteen',
     14 => 'fourteen',
     15 => 'fifteen',
    );
  
    return $trans{$number};
  }

This will print the words instead of the numbers.

=head1 SEE ALSO

L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>,L<Mojolicious::Plugin::PageNavigator>.

=head1 Repository

https://github.com/dokechin/Mojolicious-Plugin-BootstrapPagination

=head1 LICENSE

Copyright (C) dokechin.

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.

=head1 AUTHOR

dokechin E<lt>E<gt>

=head1 CONTRIBUTORS

Andrey Chips Kuzmin <chipsoid@cpan.org>

=cut