Plugins/Wolfram: add `wolfram` command (#58)

Plugins/Wolfram.pm

@@ -0,0 +1,56 @@
+# File: Wolfram.pm
+#
+# Purpose: Query Wolfram|Alpha's Short Answers API.
+
+# 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::Wolfram;
+use parent 'Plugins::Plugin';
+
+use PBot::Imports;
+
+use LWP::UserAgent::Paranoid;
+use URI::Escape qw/uri_escape_utf8/;
+
+sub initialize {
+    my ($self, %conf) = @_;
+
+    $self->{pbot}->{registry}->add_default('text', 'wolfram', 'api_key', '');
+
+    $self->{pbot}->{registry}->set_default('wolfram', 'api_key', 'private', 1);
+
+    $self->{pbot}->{commands}->register(sub { $self->cmd_wolfram(@_) }, 'wolfram', 0);
+}
+
+sub unload {
+    my $self = shift;
+    $self->{pbot}->{commands}->unregister('wolfram');
+}
+
+sub cmd_wolfram {
+    my ($self, $context) = @_;
+
+    return "Usage: wolfram QUERY\n" if not length $context->{arguments};
+
+    my $api_key = $self->{pbot}->{registry}->get_value('wolfram', 'api_key');
+
+    if (not length $api_key) {
+        return "$context->{nick}: Registry item wolfram.api_key is not set. See https://developer.wolframalpha.com/portal/myapps to get an API key.";
+    }
+
+    my $ua = LWP::UserAgent::Paranoid->new(agent => 'Mozilla/5.0', request_timeout => 10);
+
+    my $question = uri_escape_utf8 $context->{arguments};
+    my $units = uri_escape_utf8($self->{pbot}->{users}->get_user_metadata($context->{from}, $context->{hostmask}, 'units') // 'metric');
+    my $response = $ua->get("https://api.wolframalpha.com/v1/result?appid=$api_key&i=$question&units=$units&timeout=10");
+
+    if ($response->is_success) {
+        return "$context->{nick}: " . $response->decoded_content;
+    } else {
+        return "Failed to query Wolfram|Alpha: " . $response->status_line;
+    }
+}
+
+1;

README.md

@@ -218,6 +218,7 @@ Plugin | Description
 [UrlTitles](Plugins/UrlTitles.pm) | When a URL is seen in a channel, intelligently display its title. It will not display titles that are textually similiar to the URL, in order to maintain the channel signal-noise ratio.
 [Quotegrabs](Plugins/Quotegrabs.pm) | Grabs channel messages as quotes for posterity. Can grab messages from anywhere in the channel history. Can grab multiple messages at once!
 [Weather](Plugins/Weather.pm) | Fetches and shows weather data for a location.
+[Wolfram](Plugins/Wolfram.pm) | Queries Wolfram|Alpha for answers.
 [Wttr](Plugins/Wttr.pm) | Advanced weather Plugin with tons of options. Uses wttr.in.
 [RemindMe](Plugins/RemindMe.pm) | Lets people set up reminders. Lots of options.
 [ActionTrigger](Plugins/ActionTrigger.pm) | Lets admins set regular expression triggers to execute PBot commands or factoids.

data/plugin_autoload

@@ -19,4 +19,5 @@ RestrictedMod
 TypoSub
 UrlTitles
 Weather
+Wolfram
 Wttr

doc/Admin.md

@@ -522,7 +522,7 @@ Usage: `pluglist`
        <PBot> Loaded plugins: ActionTrigger, AntiAway, AntiKickAutoRejoin, AntiNickSpam,
               AntiRepeat, AntiTwitter, AutoRejoin, Battleship, Connect4, Counter, Date,
               GoogleSearch, Quotegrabs, RemindMe, RestrictedMod, Spinach, TypoSub, UrlTitles,
-              Weather, Wttr
+              Weather, Wolfram, Wttr
 
 ## Command metadata commands
 ### cmdset