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https://github.com/pragma-/pbot.git
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350 lines
12 KiB
Perl
350 lines
12 KiB
Perl
# File: Commands.pm
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#
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# Author: pragma_
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#
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# Purpose: Registers commands. Invokes commands with user capability
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# validation.
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package PBot::Commands;
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use parent 'PBot::Class', 'PBot::Registerable';
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use warnings; use strict;
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use feature 'unicode_strings';
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use utf8;
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use Time::Duration qw/duration/;
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sub initialize {
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my ($self, %conf) = @_;
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# PBot::Commands can register subrefs
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$self->PBot::Registerable::initialize(%conf);
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# command metadata stored as a HashObject
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$self->{metadata} = PBot::HashObject->new(pbot => $self->{pbot}, name => 'Command metadata', filename => $conf{filename});
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$self->{metadata}->load;
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# register commands to manipulate command metadata and obtain help
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$self->register(sub { $self->cmd_set(@_) }, "cmdset", 1);
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$self->register(sub { $self->cmd_unset(@_) }, "cmdunset", 1);
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$self->register(sub { $self->cmd_help(@_) }, "help", 0);
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}
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sub cmd_set {
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my ($self, $context) = @_;
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my ($command, $key, $value) = $self->{pbot}->{interpreter}->split_args($context->{arglist}, 3);
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if (not defined $command) {
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return "Usage: cmdset <command> [key [value]]";
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}
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return $self->{metadata}->set($command, $key, $value);
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}
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sub cmd_unset {
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my ($self, $context) = @_;
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my ($command, $key) = $self->{pbot}->{interpreter}->split_args($context->{arglist}, 2);
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if (not defined $command or not defined $key) {
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return "Usage: cmdunset <command> <key>";
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}
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return $self->{metadata}->unset($command, $key);
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}
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sub cmd_help {
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my ($self, $context) = @_;
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if (not length $context->{arguments}) {
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return "For general help, see <https://github.com/pragma-/pbot/tree/master/doc>. For help about a specific command or factoid, use `help <keyword> [channel]`.";
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}
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my $keyword = lc $self->{pbot}->{interpreter}->shift_arg($context->{arglist});
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# check built-in commands first
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if ($self->exists($keyword)) {
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# check for command metadata
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if ($self->{metadata}->exists($keyword)) {
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my $name = $self->{metadata}->get_key_name($keyword);
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my $requires_cap = $self->{metadata}->get_data($keyword, 'requires_cap');
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my $help = $self->{metadata}->get_data($keyword, 'help');
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my $result = "/say $name: ";
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# prefix help text with required capability
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if ($requires_cap) {
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$result .= "[Requires can-$keyword] ";
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}
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if (not defined $help or not length $help) {
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$result .= "I have no help text for this command yet. To add help text, use the command `cmdset $keyword help <text>`.";
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} else {
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$result .= $help;
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}
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return $result;
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}
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# no command metadata available
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return "$keyword is a built-in command, but I have no help for it yet.";
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}
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# then factoids
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my $channel_arg = $self->{pbot}->{interpreter}->shift_arg($context->{arglist});
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if (not defined $channel_arg or not length $channel_arg) {
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# set channel argument to from if no argument was passed
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$channel_arg = $context->{from};
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}
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if ($channel_arg !~ /^#/) {
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# set channel argument to global if it's not channel-like
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$channel_arg = '.*';
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}
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# find factoids
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my @factoids = $self->{pbot}->{factoids}->find_factoid($channel_arg, $keyword, exact_trigger => 1);
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if (not @factoids or not $factoids[0]) {
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# nothing found
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return "I don't know anything about $keyword.";
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}
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my ($channel, $trigger);
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if (@factoids > 1) {
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# ask to disambiguate factoids if found in multiple channels
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if (not grep { $_->[0] eq $channel_arg } @factoids) {
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return
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"/say $keyword found in multiple channels: "
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. (join ', ', sort map { $_->[0] eq '.*' ? 'global' : $_->[0] } @factoids)
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. "; use `help $keyword <channel>` to disambiguate.";
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} else {
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foreach my $factoid (@factoids) {
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if ($factoid->[0] eq $channel_arg) {
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($channel, $trigger) = ($factoid->[0], $factoid->[1]);
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last;
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}
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}
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}
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} else {
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($channel, $trigger) = ($factoids[0]->[0], $factoids[0]->[1]);
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}
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# get canonical channel and trigger names with original typographical casing
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my $channel_name = $self->{pbot}->{factoids}->{factoids}->get_key_name($channel);
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my $trigger_name = $self->{pbot}->{factoids}->{factoids}->get_key_name($channel, $trigger);
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# prettify channel name if it's ".*"
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if ($channel_name eq '.*') {
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$channel_name = 'global channel';
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}
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# prettify trigger name with double-quotes if it contains spaces
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if ($trigger_name =~ / /) {
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$trigger_name = "\"$trigger_name\"";
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}
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# get factoid's `help` metadata
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my $help = $self->{pbot}->{factoids}->{factoids}->get_data($channel, $trigger, 'help');
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# return immediately if no help text
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if (not defined $help or not length $help) {
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return "/say $trigger_name is a factoid for $channel_name, but I have no help text for it yet."
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. " To add help text, use the command `factset $trigger_name help <text>`.";
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}
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my $result = "/say ";
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# if factoid doesn't belong to invoked or global channel,
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# then prefix with the factoid's channel name.
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if ($channel ne $context->{from} and $channel ne '.*') {
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$result .= "[$channel_name] ";
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}
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$result .= "$trigger_name: $help";
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return $result;
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}
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sub register {
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my ($self, $subref, $name, $requires_cap) = @_;
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if (not defined $subref or not defined $name) {
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Carp::croak("Missing parameters to Commands::register");
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}
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# register subref
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my $command = $self->PBot::Registerable::register($subref);
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# update internal metadata
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$command->{name} = lc $name;
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$command->{requires_cap} = $requires_cap // 0;
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# update command metadata
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if (not $self->{metadata}->exists($name)) {
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$self->{metadata}->add($name, { requires_cap => $requires_cap, help => '' }, 1);
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} else {
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# metadata already exists, just update requires_cap unless it's already set.
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if (not defined $self->get_meta($name, 'requires_cap')) {
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$self->{metadata}->set($name, 'requires_cap', $requires_cap, 1);
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}
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}
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# add can-<command> capability to PBot capabilities if required
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if ($requires_cap) {
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$self->{pbot}->{capabilities}->add("can-$name", undef, 1);
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}
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return $command;
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}
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sub unregister {
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my ($self, $name) = @_;
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Carp::croak("Missing name parameter to Commands::unregister") if not defined $name;
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$name = lc $name;
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@{$self->{handlers}} = grep { $_->{name} ne $name } @{$self->{handlers}};
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}
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sub exists {
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my ($self, $keyword) = @_;
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$keyword = lc $keyword;
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foreach my $command (@{$self->{handlers}}) { return 1 if $command->{name} eq $keyword; }
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return 0;
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}
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sub set_meta {
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my ($self, $command, $key, $value, $save) = @_;
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return undef if not $self->{metadata}->exists($command);
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$self->{metadata}->set($command, $key, $value, !$save);
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return 1;
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}
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sub get_meta {
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my ($self, $command, $key) = @_;
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return $self->{metadata}->get_data($command, $key);
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}
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# main entry point for PBot::Interpreter to interpret a registered bot command
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# see also PBot::Factoids::interpreter() for factoid commands
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sub interpreter {
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my ($self, $context) = @_;
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# debug flag to trace $context location and contents
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if ($self->{pbot}->{registry}->get_value('general', 'debugcontext')) {
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use Data::Dumper;
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$Data::Dumper::Sortkeys = 1;
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$self->{pbot}->{logger}->log("Commands::interpreter\n");
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$self->{pbot}->{logger}->log(Dumper $context);
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}
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# some convenient aliases
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my $keyword = lc $context->{keyword};
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my $from = $context->{from};
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# set the channel the command is in reference to
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my ($cmd_channel) = $context->{arguments} =~ m/\B(#[^ ]+)/; # assume command is invoked in regards to first channel-like argument
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$cmd_channel = $from if not defined $cmd_channel; # otherwise command is invoked in regards to the channel the user is in
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$context->{channel} = $cmd_channel;
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# get the user's bot account
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my $user = $self->{pbot}->{users}->find_user($cmd_channel, $context->{hostmask});
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# check for a capability override
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my $cap_override;
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if (exists $context->{'cap-override'}) {
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$self->{pbot}->{logger}->log("Override cap to $context->{'cap-override'}\n");
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$cap_override = $context->{'cap-override'};
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}
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# go through all commands
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# TODO: maybe use a hash lookup
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foreach my $command (@{$self->{handlers}}) {
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# is this the command
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if ($command->{name} eq $keyword) {
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# does this command require capabilities
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my $requires_cap = $self->get_meta($keyword, 'requires_cap') // $command->{requires_cap};
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if ($requires_cap) {
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if (defined $cap_override) {
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if (not $self->{pbot}->{capabilities}->has($cap_override, "can-$keyword")) {
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return "/msg $context->{nick} The $keyword command requires the can-$keyword capability, which cap-override $cap_override does not have.";
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}
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} else {
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if (not defined $user) {
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my ($found_chan, $found_mask) = $self->{pbot}->{users}->find_user_account($cmd_channel, $context->{hostmask}, 1);
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if (not defined $found_chan) {
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return "/msg $context->{nick} You must have a user account to use $keyword. You may use the `my` command to create a personal user account. See `help my`.";
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} else {
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return "/msg $context->{nick} You must have a user account in $cmd_channel to use $keyword. (You have an account in $found_chan.)";
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}
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} elsif (not $user->{loggedin}) {
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return "/msg $context->{nick} You must be logged into your user account to use $keyword.";
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}
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if (not $self->{pbot}->{capabilities}->userhas($user, "can-$keyword")) {
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return "/msg $context->{nick} The $keyword command requires the can-$keyword capability, which your user account does not have.";
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}
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}
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}
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if ($self->get_meta($keyword, 'preserve_whitespace')) {
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$context->{preserve_whitespace} = 1;
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}
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unless ($self->get_meta($keyword, 'dont-replace-pronouns')) {
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$context->{arguments} = $self->{pbot}->{factoids}->expand_factoid_vars($context, $context->{arguments});
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$context->{arglist} = $self->{pbot}->{interpreter}->make_args($context->{arguments});
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}
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$self->{pbot}->{logger}->log("Disabling nickprefix\n");
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$context->{nickprefix_disabled} = 1;
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if ($self->get_meta($keyword, 'background-process')) {
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# execute this command as a backgrounded process
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# set timeout to command metadata value
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my $timeout = $self->get_meta($keyword, 'process-timeout');
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# otherwise set timeout to default value
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$timeout //= $self->{pbot}->{registry}->get_value('processmanager', 'default_timeout');
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# execute command in background
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$self->{pbot}->{process_manager}->execute_process(
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$context,
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sub { $context->{result} = $command->{subref}->($context) },
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$timeout,
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);
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# return no output since it will be handled by process manager
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return '';
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} else {
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# execute this command normally
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my $result = $command->{subref}->($context);
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# disregard undesired command output if command is embedded
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return undef if $context->{referenced} and $result =~ m/(?:usage:|no results)/i;
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# return command output
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return $result;
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}
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}
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}
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return undef;
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}
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1;
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