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542 lines
17 KiB
Perl
542 lines
17 KiB
Perl
# File: ActionTrigger.pm
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#
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# Purpose: provides interface to set/remove/modify regular expression triggers
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# which invoke bot commands when matched against IRC messages.
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#
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# Usage: actiontrigger add <#channel or global> <capability> <rate-limit (in seconds)> <regex trigger> <command>
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#
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# Note that ActionTrigger does not match on raw IRC lines. It matches on a
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# simplified message format:
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#
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# "<hostmask> <action> <arguments>"
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#
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# where <action> can be PRIVMSG, ACTION, KICK, JOIN, PART or QUIT.
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#
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# Examples:
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#
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# Greet a nick when they join the channel:
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# actiontrigger add #channel none 0 ^(?i)([^!]+)![^\s]+.JOIN echo Hi $1, welcome to $channel!
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#
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# Same, but via private message (set capability to "admin" to use `msg` admin command):
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# actiontrigger add #channel admin 0 ^(?i)([^!]+)![^\s]+.JOIN msg $1 Hi $1, welcome to $channel!
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#
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# Kick a nick if they say a naughty thing. Set capability to "can-kick" to use `kick` admin command.
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# actiontrigger add global can-kick 0 "^(?i)([^!]+)![^\s]+.PRIVMSG.*bad phrase" kick $1 Do you talk to your mother with that mouth?
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#
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# Say something when a keyword is seen, but only once every 5 minutes:
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# actiontrigger add global none 300 "some phrase" echo Something!
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#
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# Capture a part of somebody's message.
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# actiontrigger add #channel none 0 "(?i)how is the weather (?:in|for) (.*) today" weather $1
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#
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# These are basic examples; more complex examples can be crafted.
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# SPDX-FileCopyrightText: 2021 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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package PBot::Plugin::ActionTrigger;
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use parent 'PBot::Plugin::Base';
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use PBot::Imports;
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use DBI;
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use Time::Duration qw/duration/;
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use Time::HiRes qw/gettimeofday/;
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sub initialize {
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my ($self, %conf) = @_;
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# register bot command
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$self->{pbot}->{commands}->add(
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name => 'actiontrigger',
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help => 'Manages regular expression triggers to invoke bot commands',
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requires_cap => 1,
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subref => sub { $self->cmd_actiontrigger(@_) },
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);
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# add capability to admin group
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$self->{pbot}->{capabilities}->add('admin', 'can-actiontrigger', 1);
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# register IRC handlers
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$self->{pbot}->{event_dispatcher}->register_handler('irc.public', sub { $self->on_public(@_) });
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$self->{pbot}->{event_dispatcher}->register_handler('irc.caction', sub { $self->on_action(@_) });
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$self->{pbot}->{event_dispatcher}->register_handler('irc.join', sub { $self->on_join(@_) });
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$self->{pbot}->{event_dispatcher}->register_handler('irc.part', sub { $self->on_departure(@_) });
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$self->{pbot}->{event_dispatcher}->register_handler('irc.quit', sub { $self->on_departure(@_) });
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$self->{pbot}->{event_dispatcher}->register_handler('irc.kick', sub { $self->on_kick(@_) });
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# database file
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$self->{filename} = $self->{pbot}->{registry}->get_value('general', 'data_dir') . '/triggers.sqlite3';
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# open and initialize database
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$self->dbi_begin;
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$self->create_database;
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}
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sub unload {
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my ($self) = @_;
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# close database
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$self->dbi_end;
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# unregister bot command
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$self->{pbot}->{commands}->remove('actiontrigger');
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# remove capability
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$self->{pbot}->{capabilities}->remove('can-actiontrigger');
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# remove IRC handlers
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$self->{pbot}->{event_dispatcher}->remove_handler('irc.public');
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$self->{pbot}->{event_dispatcher}->remove_handler('irc.caction');
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$self->{pbot}->{event_dispatcher}->remove_handler('irc.join');
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$self->{pbot}->{event_dispatcher}->remove_handler('irc.part');
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$self->{pbot}->{event_dispatcher}->remove_handler('irc.quit');
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$self->{pbot}->{event_dispatcher}->remove_handler('irc.kick');
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}
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sub cmd_actiontrigger {
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my ($self, $context) = @_;
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# database not available
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return "Internal error." if not $self->{dbh};
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my $command = $self->{pbot}->{interpreter}->shift_arg($context->{arglist});
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given ($command) {
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when ('list') {
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my $channel = $self->{pbot}->{interpreter}->shift_arg($context->{arglist});
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if (not defined $channel) {
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if ($context->{from} !~ /^#/) {
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# used from /msg
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$channel = 'global';
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} else {
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# used in channel
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$channel = $context->{from};
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}
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}
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elsif ($channel !~ m/^#/ and $channel ne 'global') {
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return "Invalid channel $channel. Usage: actiontrigger list [#channel or global]";
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}
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my @triggers = $self->list_triggers($channel);
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if (not @triggers) {
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return "No action triggers set for $channel.";
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}
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else {
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my $result = "Triggers for $channel:\n";
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my @items;
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foreach my $trigger (@triggers) {
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$trigger->{cap_override} //= 'none';
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$trigger->{ratelimit} //= 0;
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my $item = "$trigger->{trigger} -> $trigger->{action}";
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if ($trigger->{cap_override} and $trigger->{cap_override} ne 'none') {
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$item .= " (capability=$trigger->{cap_override})";
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}
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if ($trigger->{ratelimit} != 0) {
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$item .= " (ratelimit=$trigger->{ratelimit})";
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}
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push @items, $item;
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}
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$result .= join ",\n", @items;
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return $result;
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}
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}
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when ('add') {
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# TODO: use GetOpt flags instead of positional arguments
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my $channel;
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if ($context->{from} =~ m/^#/) {
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$channel = $context->{from};
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}
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else {
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$channel = $self->{pbot}->{interpreter}->shift_arg($context->{arglist});
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if (not defined $channel) {
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return
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"To use this command from private message the <channel> argument is required. Usage: actiontrigger add <#channel or global> <capability> <rate-limit (in seconds)> <regex trigger> <command>";
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}
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elsif ($channel !~ m/^#/ and $channel ne 'global') {
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return "Invalid channel $channel. Usage: actiontrigger add <#channel or global> <capability> <rate-limit (in seconds)> <regex trigger> <command>";
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}
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}
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# split into 4 arguments, offset 0, preserving quotes
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my ($cap_override, $ratelimit, $trigger, $action) = $self->{pbot}->{interpreter}->split_args($context->{arglist}, 4, 0, 1);
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if (not defined $trigger or not defined $action) {
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if ($context->{from} !~ m/^#/) {
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return
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"To use this command from private message the <channel> argument is required. Usage: actiontrigger add <#channel or global> <capability> <rate-limit (in seconds)> <regex trigger> <command>";
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} else {
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return "Usage: actiontrigger add <capability> <rate-limit (in seconds)> <regex trigger> <command>";
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}
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}
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if (defined $self->get_trigger($channel, $trigger)) {
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return "Trigger already exists.";
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}
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if ($ratelimit !~ m/^\d+$/) {
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return "$context->{nick}: Missing rate-limit argument?\n";
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}
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if ($cap_override ne 'none') {
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if (not $self->{pbot}->{capabilities}->exists($cap_override)) {
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return "$context->{nick}: Capability '$cap_override' does not exist. Use 'none' to omit.\n";
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}
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my $u = $self->{pbot}->{users}->find_user($channel, $context->{hostmask});
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if (not $self->{pbot}->{capabilities}->userhas($u, $cap_override)) {
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return "You may not set a capability that you do not have.";
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}
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}
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if ($self->add_trigger($channel, $trigger, $action, $context->{hostmask}, $cap_override, $ratelimit)) {
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return "Trigger added.";
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} else {
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return "Failed to add trigger.";
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}
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}
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when ('delete') {
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my $channel;
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if ($context->{from} =~ m/^#/) {
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$channel = $context->{from};
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}
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else {
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$channel = $self->{pbot}->{interpreter}->shift_arg($context->{arglist});
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if ($channel !~ m/^#/ and $channel ne 'global') {
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return "To use this command from private message the <channel> argument is required. Usage: actiontrigger delete <#channel or global> <regex trigger>";
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}
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}
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my ($trigger) = $self->{pbot}->{interpreter}->split_args($context->{arglist}, 1);
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if (not defined $trigger) {
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if ($context->{from} !~ m/^#/) {
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return "To use this command from private message the <channel> argument is required. Usage: from private message: actiontrigger delete <channel> <regex trigger>";
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} else {
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return "Usage: actiontrigger delete <regex trigger>";
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}
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}
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if (not defined $self->get_trigger($channel, $trigger)) {
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return "No such trigger.";
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} else {
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$self->delete_trigger($channel, $trigger);
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return "Trigger deleted.";
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}
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}
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default {
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if ($context->{from} !~ m/^#/) {
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return
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"Usage from private message: actiontrigger list [#channel or global] | actiontrigger add <#channel or global> <capability> <rate-limit (in seconds)> <regex trigger> <command> | actiontrigger delete <#channel or global> <regex trigger>";
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} else {
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return
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"Usage: actiontrigger list [#channel or global] | actiontrigger add <capability> <rate-limit (in seconds)> <regex trigger> <command> | actiontrigger delete <regex>";
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}
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}
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}
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}
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sub create_database {
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my $self = shift;
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return if not $self->{dbh};
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eval {
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$self->{dbh}->do(<<SQL);
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CREATE TABLE IF NOT EXISTS Triggers (
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channel TEXT,
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trigger TEXT,
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action TEXT,
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owner TEXT,
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cap_override TEXT,
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ratelimit INTEGER,
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lastused NUMERIC
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)
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SQL
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};
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$self->{pbot}->{logger}->log("ActionTrigger create database failed: $@") if $@;
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}
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sub dbi_begin {
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my ($self) = @_;
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eval {
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$self->{dbh} = DBI->connect("dbi:SQLite:dbname=$self->{filename}", "", "", {RaiseError => 1, PrintError => 0, AutoInactiveDestroy => 1, sqlite_unicode => 1})
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or die $DBI::errstr;
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};
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if ($@) {
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$self->{pbot}->{logger}->log("Error opening ActionTrigger database: $@");
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return 0;
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} else {
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return 1;
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}
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}
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sub dbi_end {
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my ($self) = @_;
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return if not $self->{dbh};
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$self->{dbh}->disconnect;
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delete $self->{dbh};
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}
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sub add_trigger {
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my ($self, $channel, $trigger, $action, $owner, $cap_override, $ratelimit) = @_;
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return 0 if $self->get_trigger($channel, $trigger);
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eval {
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my $sth = $self->{dbh}->prepare('INSERT INTO Triggers (channel, trigger, action, owner, cap_override, ratelimit, lastused) VALUES (?, ?, ?, ?, ?, ?, 0)');
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$sth->execute(lc $channel, $trigger, $action, $owner, $cap_override, $ratelimit);
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};
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if ($@) {
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$self->{pbot}->{logger}->log("Add trigger failed: $@");
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return 0;
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}
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return 1;
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}
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sub delete_trigger {
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my ($self, $channel, $trigger) = @_;
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return 0 if not $self->get_trigger($channel, $trigger);
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my $sth = $self->{dbh}->prepare('DELETE FROM Triggers WHERE channel = ? AND trigger = ?');
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$sth->execute(lc $channel, $trigger);
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return 1;
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}
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sub list_triggers {
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my ($self, $channel) = @_;
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my $triggers = eval {
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my $sth;
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if ($channel eq '*') {
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$channel = 'global';
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$sth = $self->{dbh}->prepare('SELECT * FROM Triggers WHERE channel != ?');
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} else {
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$sth = $self->{dbh}->prepare('SELECT * FROM Triggers WHERE channel = ?');
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}
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$sth->execute(lc $channel);
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return $sth->fetchall_arrayref({});
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};
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if ($@) { $self->{pbot}->{logger}->log("List triggers failed: $@"); }
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$triggers = [] if not defined $triggers;
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return @$triggers;
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}
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sub update_trigger {
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my ($self, $channel, $trigger, $data) = @_;
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eval {
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my $sql = 'UPDATE Triggers SET ';
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my @triggers;
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foreach my $key (keys %$data) {
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push @triggers, "$key = ?";
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}
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$sql .= join ', ', @triggers;
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$sql .= "WHERE trigger = ? AND channel = ?";
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my $sth = $self->{dbh}->prepare($sql);
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my $param = 1;
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foreach my $key (keys %$data) { $sth->bind_param($param++, $data->{$key}); }
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$sth->bind_param($param++, $trigger);
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$sth->bind_param($param, $channel);
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$sth->execute;
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};
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$self->{pbot}->{logger}->log("Update trigger $channel/$trigger failed: $@\n") if $@;
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}
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sub get_trigger {
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my ($self, $channel, $trigger) = @_;
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my $row = eval {
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my $sth = $self->{dbh}->prepare('SELECT * FROM Triggers WHERE channel = ? AND trigger = ?');
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$sth->execute(lc $channel, $trigger);
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my $row = $sth->fetchrow_hashref;
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return $row;
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};
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if ($@) {
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$self->{pbot}->{logger}->log("Get trigger failed: $@");
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return undef;
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}
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return $row;
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}
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sub on_kick {
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my ($self, $event_type, $event) = @_;
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# don't handle this event if it was caused by a bot command
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return 0 if $event->{interpreted};
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my ($nick, $user, $host) = (
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$event->{event}->nick,
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$event->{event}->user,
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$event->{event}->host
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);
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my ($victim, $reason) = (
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$event->{event}->to,
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$event->{event}->{args}[1]
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);
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my $channel = $event->{event}->{args}[0];
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$self->check_trigger($nick, $user, $host, $channel, "KICK $victim $reason");
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return 0;
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}
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sub on_action {
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my ($self, $event_type, $event) = @_;
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my ($nick, $user, $host, $msg) = (
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$event->{event}->nick,
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$event->{event}->user,
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$event->{event}->host,
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$event->{event}->args
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);
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my $channel = $event->{event}->{to}[0];
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$msg =~ s/^\/me\s+//;
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$self->check_trigger($nick, $user, $host, $channel, "ACTION $msg");
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return 0;
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}
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sub on_public {
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my ($self, $event_type, $event) = @_;
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my ($nick, $user, $host, $msg) = (
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$event->{event}->nick,
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$event->{event}->user,
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$event->{event}->host,
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$event->{event}->args);
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my $channel = $event->{event}->{to}[0];
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$self->check_trigger($nick, $user, $host, $channel, "PRIVMSG $msg");
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return 0;
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}
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sub on_join {
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my ($self, $event_type, $event) = @_;
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my ($nick, $user, $host, $channel, $args) = (
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$event->{event}->nick,
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$event->{event}->user,
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$event->{event}->host,
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$event->{event}->to,
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$event->{event}->args
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);
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$self->check_trigger($nick, $user, $host, $channel, "JOIN");
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return 0;
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}
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sub on_departure {
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my ($self, $event_type, $event) = @_;
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my ($nick, $user, $host, $channel, $args) = (
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$event->{event}->nick,
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$event->{event}->user,
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$event->{event}->host,
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$event->{event}->to,
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$event->{event}->args
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);
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$self->check_trigger($nick, $user, $host, $channel, (uc $event->{event}->type) . " $args");
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return 0;
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}
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sub check_trigger {
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my ($self, $nick, $user, $host, $channel, $text) = @_;
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# database not available
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return 0 if not $self->{dbh};
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$channel = lc $channel;
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# TODO: cache these instead of loading them again every message
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my @triggers = $self->list_triggers($channel);
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my @globals = $self->list_triggers('global');
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push @triggers, @globals;
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$text = "$nick!$user\@$host $text";
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my $now = gettimeofday;
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foreach my $trigger (@triggers) {
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eval {
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$trigger->{lastused} //= 0;
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$trigger->{ratelimit} //= 0;
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if ($now - $trigger->{lastused} >= $trigger->{ratelimit} and $text =~ m/$trigger->{trigger}/) {
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my @stuff = ($1, $2, $3, $4, $5, $6, $7, $8, $9);
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$trigger->{lastused} = $now;
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|
$self->update_trigger($trigger->{channel}, $trigger->{trigger}, { lastused => $now });
|
|
|
|
my $action = $trigger->{action};
|
|
my $i;
|
|
map { ++$i; $action =~ s/\$$i/$_/g; } @stuff;
|
|
|
|
my ($n, $u, $h) = $trigger->{owner} =~ /^([^!]+)!([^@]+)\@(.*)$/;
|
|
|
|
my $command = {
|
|
nick => $n,
|
|
user => $u,
|
|
host => $h,
|
|
hostmask => "$n!$u\@$host",
|
|
command => $action,
|
|
};
|
|
|
|
if ($trigger->{cap_override} and $trigger->{cap_override} ne 'none') {
|
|
$command->{'cap-override'} = $trigger->{cap_override};
|
|
}
|
|
|
|
my $cap = '';
|
|
$cap = " (capability=$command->{'cap-override'})" if exists $command->{'cap-override'};
|
|
$self->{pbot}->{logger}->log("ActionTrigger: ($channel) $trigger->{trigger} -> $action$cap\n");
|
|
|
|
$self->{pbot}->{interpreter}->add_to_command_queue($channel, $command);
|
|
}
|
|
};
|
|
|
|
if ($@) { $self->{pbot}->{logger}->log("Skipping bad trigger $trigger->{trigger}: $@"); }
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
1;
|