package Finance::Currency::Convert::KlikBCA;
use 5.010001;
use strict;
use warnings;
use Log::Any '$log';
use LWP::Simple;
use Parse::Number::ID qw(parse_number_id);
our $VERSION = '0.07'; # VERSION
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(get_currencies convert_currency);
our %SPEC;
$SPEC{get_currencies} = {
summary => 'Extract data from KlikBCA/BCA page',
v => 1.1,
};
sub get_currencies {
my %args = @_;
#return [543, "Test parse failure response"];
my $page;
if ($args{_page_content}) {
$page = $args{_page_content};
} else {
$page = get "http://www.bca.co.id/id/kurs-sukubunga/kurs_counter_bca/kurs_counter_bca_landing.jsp"
or return [500, "Can't retrieve BCA page"];
}
$page =~ s!(<table .+? Mata\sUang .+?</table>)!!xs
or return [543, "Can't scrape Mata Uang table"];
my $mu_table = $1;
$page =~ s!(<table .+? e-Rate .+?</table>)!!xs
or return [543, "Can't scrape e-Rate table"];
my $er_table = $1;
$page =~ s!(<table .+? TT \s Counter .+?</table>)!!xs
or return [543, "Can't scrape TT Counter table"];
my $ttc_table = $1;
$page =~ s!(<table .+? Bank \s Notes .+?</table>)!!xs
or return [543, "Can't scrape e-Rate table"];
my $bn_table = $1;
my @items;
while ($mu_table =~ m!<td[^>]+>([A-Z]{3})</td>!gsx) {
push @items, { currency => $1 };
}
@items or return [543, "Check: no currencies found in Mata Uang Table"];
my $num_items = @items;
my $i;
$num_items >= 3 or return [543, "Sanity: too few items found in Mata Uang Table"];
$i = 0;
while ($er_table =~ m{
<td[^>]+>([0-9.,]+)</td>\s+
<td[^>]+>([0-9.,]+)</td>\s*
(?:<!--.+?-->)?\s*</tr>
}xsg) {
$items[$i]{sell_er} = parse_number_id(text=>$1);
$items[$i]{buy_er} = parse_number_id(text=>$2);
$i++;
}
$i == $num_items or
return [543, "Check: #rows in Mata Uang table != Bank Notes table"];
$i = 0;
while ($ttc_table =~ m{
<td[^>]+>([0-9.,]+)</td>\s+
<td[^>]+>([0-9.,]+)</td>\s*
(?:<!--.+?-->)?\s*</tr>
}xsg) {
$items[$i]{sell_ttc} = parse_number_id(text=>$1);
$items[$i]{buy_ttc} = parse_number_id(text=>$2);
$i++;
}
$i == $num_items or
return [543, "Check: #rows in Mata Uang table != TT Counter table"];
$i = 0;
while ($bn_table =~ m{
<td[^>]+>([0-9.,]+)</td>\s+
<td[^>]+>([0-9.,]+)</td>\s*
(?:<!--.+?-->)?\s*</tr>
}xsg) {
$items[$i]{sell_bn} = parse_number_id(text=>$1);
$items[$i]{buy_bn} = parse_number_id(text=>$2);
$i++;
}
$i == $num_items or
return [543, "Check: #rows in Mata Uang table != Bank Notes table"];
my %items;
for (@items) {
$items{uc $_->{currency}} = $_;
delete $_->{currency};
}
[200, "OK", {update_date=>undef, currencies=>\%items}];
}
# used for testing only
our $_get_res;
$SPEC{convert_currency} = {
summary => 'Convert currency using KlikBCA',
args => {
n => {
schema=>'float*',
req => 1,
pos => 0,
},
from => {
schema=>'str*',
req => 1,
pos => 1,
},
to => {
schema=>'str*',
req => 1,
pos => 2,
},
},
args_as => 'array',
v => 1.1,
result_naked => 1,
};
sub convert_currency {
my ($n, $from, $to) = @_;
unless ($_get_res) {
$_get_res = get_currencies();
unless ($_get_res->[0] == 200) {
warn "Can't get currencies: $_get_res->[0] - $_get_res->[1]\n";
return undef;
}
}
if (uc($to) ne 'IDR') {
die "Currently only conversion to IDR is supported".
" (you asked for conversion to '$to')\n";
}
my $c = $_get_res->[2]{currencies}{uc $from} or return undef;
$n * ($c->{sell_bn} + $c->{buy_bn}) / 2;
}
1;
# ABSTRACT: Convert currencies using data from KlikBCA/BCA
__END__
=pod
=encoding UTF-8
=head1 NAME
Finance::Currency::Convert::KlikBCA - Convert currencies using data from KlikBCA/BCA
=head1 VERSION
This document describes version 0.07 of Finance::Currency::Convert::KlikBCA (from Perl distribution Finance-Currency-Convert-KlikBCA), released on 2014-09-05.
=head1 SYNOPSIS
use Finance::Currency::Convert::KlikBCA qw(convert_currency);
printf "1 USD = Rp %.0f\n", convert_currency(1, 'USD', 'IDR');
=head1 DESCRIPTION
=head1 FUNCTIONS
=head2 convert_currency($amount, $from, $to) => NUM
Currently can only handle conversion *to* IDR. Dies if given other currency.
Will warn if failed getting currencies from the webpage.
Currency rate is not cached (retrieved from the website every time). Employ your
own caching.
Currently uses the Bank Notes rate.
Will return undef if no conversion rate is available for the requested currency.
Use get_currencies(), which actually retrieves and scrapes the source web page,
if you need the more complete result.
=head2 convert_currency($n, $from, $to) -> any
Convert currency using KlikBCA.
Arguments ('*' denotes required arguments):
=over 4
=item * B<from>* => I<str>
=item * B<n>* => I<float>
=item * B<to>* => I<str>
=back
Return value:
(any)
=head2 get_currencies() -> [status, msg, result, meta]
Extract data from KlikBCA/BCA page.
No arguments.
Return value:
Returns an enveloped result (an array).
First element (status) is an integer containing HTTP status code
(200 means OK, 4xx caller error, 5xx function error). Second element
(msg) is a string containing error message, or 'OK' if status is
200. Third element (result) is optional, the actual result. Fourth
element (meta) is called result metadata and is optional, a hash
that contains extra information.
(any)
=head1 TODO
=over
=item * Parse last update time
=back
=head1 SEE ALSO
L<http://www.klikbca.com/>
=head1 HOMEPAGE
Please visit the project's homepage at L<https://metacpan.org/release/Finance-Currency-Convert-KlikBCA>.
=head1 SOURCE
Source repository is at L<https://github.com/perlancar/perl-Finance-Currency-Convert-KlikBCA>.
=head1 BUGS
Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=Finance-Currency-Convert-KlikBCA>
When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.
=head1 AUTHOR
perlancar <perlancar@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by perlancar@cpan.org.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut