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pbot/Plugins/Weather.pm

127 lines
3.8 KiB
Perl

# File: Weather.pm
#
# Purpose: Weather command.
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
package Plugins::Weather;
use parent 'Plugins::Plugin';
use PBot::Imports;
use PBot::Utils::LWPUserAgentCached;
use XML::LibXML;
use Getopt::Long qw(GetOptionsFromArray);
sub initialize {
my ($self, %conf) = @_;
$self->{pbot}->{commands}->register(sub { $self->cmd_weather(@_) }, "weather", 0);
}
sub unload {
my $self = shift;
$self->{pbot}->{commands}->unregister("weather");
}
sub cmd_weather {
my ($self, $context) = @_;
my $usage = "Usage: weather (<location> | -u <user account>)";
my $getopt_error;
local $SIG{__WARN__} = sub {
$getopt_error = shift;
chomp $getopt_error;
};
my $arguments = $context->{arguments};
Getopt::Long::Configure("bundling");
my ($user_override, $show_usage);
my @opt_args = $self->{pbot}->{interpreter}->split_line($arguments, strip_quotes => 1);
GetOptionsFromArray(
\@opt_args,
'u=s' => \$user_override,
'h' => \$show_usage
);
return $usage if $show_usage;
return "/say $getopt_error -- $usage" if defined $getopt_error;
$arguments = "@opt_args";
if (defined $user_override) {
my $userdata = $self->{pbot}->{users}->{storage}->get_data($user_override);
return "No such user account $user_override." if not defined $userdata;
return "User account does not have `location` set." if not exists $userdata->{location};
$arguments = $userdata->{location};
} else {
if (not length $arguments) {
$arguments = $self->{pbot}->{users}->get_user_metadata($context->{from}, $context->{hostmask}, 'location') // '';
}
}
if (not length $arguments) { return $usage; }
return $self->get_weather($arguments);
}
sub get_weather {
my ($self, $location) = @_;
my %cache_opt = (
'namespace' => 'accuweather',
'default_expires_in' => 3600
);
my $ua = PBot::Utils::LWPUserAgentCached->new(\%cache_opt, timeout => 10);
my $response = $ua->get("http://rss.accuweather.com/rss/liveweather_rss.asp?metric=0&locCode=$location");
my $xml;
if ($response->is_success) { $xml = $response->decoded_content; }
else { return "Failed to fetch weather data: " . $response->status_line; }
my $dom = XML::LibXML->load_xml(string => $xml);
my $result = '';
foreach my $channel ($dom->findnodes('//channel')) {
my $title = $channel->findvalue('./title');
my $description = $channel->findvalue('./description');
if ($description eq 'Invalid Location') {
return
"Location $location not found. Use \"<city>, <country abbrev>\" (e.g. \"paris, fr\") or a US Zip Code or \"<city>, <state abbrev>, US\" (e.g., \"austin, tx, us\").";
}
$title =~ s/ - AccuW.*$//;
$result .= "Weather for $title: ";
}
foreach my $item ($dom->findnodes('//item')) {
my $title = $item->findvalue('./title');
my $description = $item->findvalue('./description');
if ($title =~ m/^Currently:/) {
$title = $self->fix_temps($title);
$result .= "$title; ";
}
if ($title =~ m/Forecast$/) {
$description =~ s/ <img.*$//;
$description = $self->fix_temps($description);
$result .= "Forecast: $description";
last;
}
}
return $result;
}
sub fix_temps {
my ($self, $text) = @_;
$text =~ s|(-?\d+)\s*F|my $f = $1; my $c = ($f - 32 ) * 5 / 9; $c = sprintf("%.1d", $c); "${c}C/${f}F"|eg;
return $text;
}
1;