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337 lines
11 KiB
Perl
337 lines
11 KiB
Perl
# File: Variables.pm
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#
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# Purpose: Implements factoid variables, including $args, $nick, $channel, etc.
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# SPDX-FileCopyrightText: 2005-2023 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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package PBot::Core::Factoids::Variables;
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use parent 'PBot::Core::Class';
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use PBot::Imports;
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use PBot::Core::Utils::Indefinite;
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use PBot::Core::Utils::ValidateString;
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use JSON;
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sub initialize {}
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sub expand_factoid_vars($self, $context, $action, %opts) {
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my %default_opts = (
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nested => 0,
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recursions => 0,
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);
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%opts = (%default_opts, %opts);
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if (++$opts{recursions} > 100) {
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return '!recursion limit reached!';
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}
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my $from = length $context->{ref_from} ? $context->{ref_from} : $context->{from};
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my $nick = $context->{nick};
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my $root_keyword = $context->{keyword_override} ? $context->{keyword_override} : $context->{root_keyword};
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$action = defined $action ? $action : $context->{action};
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my $interpolate = $self->{pbot}->{factoids}->{data}->{storage}->get_data($context->{channel}, $context->{keyword}, 'interpolate');
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return $action if defined $interpolate and not $interpolate;
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$interpolate = $self->{pbot}->{registry}->get_value($context->{channel}, 'interpolate_factoids');
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return $action if defined $interpolate and not $interpolate;
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$action = $self->{pbot}->{factoids}->{selectors}->expand_selectors($context, $action, %opts);
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my $depth = 0;
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if ($action =~ m/^\/call --keyword-override=([^ ]+)/i) {
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$root_keyword = $1;
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}
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my $result = '';
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my $rest = $action;
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while (++$depth < 100) {
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$rest =~ s/(?<!\\)\$0/$root_keyword/g;
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my $matches = 0;
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my $expansions = 0;
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while ($rest =~ s/(.*?)(?<!\\)\$([\w|{])/$2/ms) {
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$result .= $1;
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my ($var, $orig_var);
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my $modifiers;
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my $extract_method;
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if ($rest =~ /^\{.*?\}/) {
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($var, $rest) = $self->{pbot}->{interpreter}->extract_bracketed($rest, '{', '}');
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$orig_var = $var;
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if ($var =~ /:/) {
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my @stuff = split /:/, $var, 2;
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$var = $stuff[0];
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$modifiers = ':' . $stuff[1];
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}
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$extract_method = 'bracket';
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} else {
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$rest =~ s/^(\w+)//;
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$var = $orig_var = $1;
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$extract_method = 'regex';
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}
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if ($var =~ /^(?:_.*|[[:punct:]0-9]+|a|b|nick|channel|randomnick|arglen|args|arg\[.+\])$/i) {
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# skip identifiers with leading underscores, etc
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$result .= $extract_method eq 'bracket' ? '${' . $orig_var . '}' : '$' . $orig_var;
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next;
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}
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$matches++;
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# extract channel expansion modifier
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if ($var =~ s/:(#[^: ]+|global)//i || $rest =~ s/^:(#[^: ]+|global)//i) {
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$from = $1;
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$from = '.*' if lc $from eq 'global';
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}
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my $recurse = 0;
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ALIAS:
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my @factoids = $self->{pbot}->{factoids}->{data}->find($from, $var, exact_channel => 2, exact_trigger => 2);
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if (not @factoids or not $factoids[0]) {
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$result .= $extract_method eq 'bracket' ? '${' . $orig_var . '}' : '$' . $orig_var;
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next;
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}
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my $var_chan;
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($var_chan, $var) = ($factoids[0]->[0], $factoids[0]->[1]);
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if ($self->{pbot}->{factoids}->{data}->{storage}->get_data($var_chan, $var, 'action') =~ m{^/call (.*)}ms) {
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$var = $1;
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if (++$recurse > 100) {
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$self->{pbot}->{logger}->log("Factoids: variable expansion recursion limit reached\n");
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$result .= $extract_method eq 'bracket' ? '${' . $orig_var . '}' : '$' . $orig_var;
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next;
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}
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goto ALIAS;
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}
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if ($modifiers) {
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$rest = $modifiers . $rest;
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}
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my $copy = $rest;
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my %settings = $self->{pbot}->{factoids}->{modifiers}->parse(\$copy);
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if ($self->{pbot}->{factoids}->{data}->{storage}->get_data($var_chan, $var, 'type') eq 'text') {
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my $change = $self->{pbot}->{factoids}->{data}->{storage}->get_data($var_chan, $var, 'action');
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my @list = $self->{pbot}->{interpreter}->split_line($change);
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my @replacements;
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if (wantarray) {
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@replacements = $self->{pbot}->{factoids}->{selectors}->select_item($context, join ('|', @list), \$rest, %opts);
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return @replacements;
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} else {
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push @replacements, scalar $self->{pbot}->{factoids}->{selectors}->select_item($context, join ('|', @list), \$rest, %opts);
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}
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my $replacement = $opts{nested} ? join('|', @replacements) : "@replacements";
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if (not length $replacement) {
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$result =~ s/\s+$//;
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} else {
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$replacement = $self->{pbot}->{factoids}->{variables}->expand_factoid_vars($context, $replacement, %opts);
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}
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if ($settings{'uc'}) {
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$replacement = uc $replacement;
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}
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if ($settings{'lc'}) {
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$replacement = lc $replacement;
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}
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if ($settings{'ucfirst'}) {
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$replacement = ucfirst $replacement;
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}
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if ($settings{'title'}) {
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$replacement = ucfirst lc $replacement;
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$replacement =~ s/ (\w)/' ' . uc $1/ge;
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}
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if ($settings{'json'}) {
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$replacement = $self->escape_json($replacement);
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}
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if ($result =~ s/\b(a|an)(\s+)$//i) {
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my ($article, $trailing) = ($1, $2);
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my $fixed_article = select_indefinite_article $replacement;
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if ($article eq 'AN') {
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$fixed_article = uc $fixed_article;
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} elsif ($article eq 'An' or $article eq 'A') {
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$fixed_article = ucfirst $fixed_article;
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}
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$replacement = $fixed_article . $trailing . $replacement;
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}
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$result .= $replacement;
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$expansions++;
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} else {
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$result .= $extract_method eq 'bracket' ? '${' . $orig_var . '}' : '$' . $orig_var;
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}
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}
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last if $matches == 0 or $expansions == 0;
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if (not length $rest) {
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$rest = $result;
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$result = '';
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}
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}
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$result .= $rest;
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$result = $self->expand_special_vars($from, $nick, $root_keyword, $result);
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# unescape certain symbols
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$result =~ s/(?<!\\)\\([\$\:\|])/$1/g;
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return validate_string($result, $self->{pbot}->{registry}->get_value('factoids', 'max_content_length'));
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}
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sub expand_action_arguments($self, $action, $input, $nick) {
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$action = validate_string($action, $self->{pbot}->{registry}->get_value('factoids', 'max_content_length'));
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$input = validate_string($input, $self->{pbot}->{registry}->get_value('factoids', 'max_content_length'));
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my %h;
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if (not defined $input or $input eq '') {
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$input = '';
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%h = (args => $nick);
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} else {
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%h = (args => $input);
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}
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my $jsonargs = to_json \%h;
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$jsonargs =~ s/^{".*":"//;
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$jsonargs =~ s/"}$//;
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my @args = $self->{pbot}->{interpreter}->split_line($input);
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$action =~ s/\$arglen\b|\$\{arglen\}/scalar @args/eg;
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$action =~ s/\$args:json|\$\{args:json\}/$jsonargs/g;
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if ($input eq '') {
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$action =~ s/\$p?args(?![[\w])|\$\{p?args(?![[\w])\}/$nick/g;
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} else {
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$action =~ s/\$args(?![[\w])|\$\{args(?![[\w])\}/$input/g;
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}
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my $depth = 0;
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my $const_action = $action;
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while ($const_action =~ m/\$arg\[([^]]+)]|\$\{arg\[([^]]+)]\}/g) {
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my $arg = defined $2 ? $2 : $1;
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last if ++$depth >= 100;
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if ($arg eq '*') {
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if ($input eq '') {
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$action =~ s/\$arg\[\*\]|\$\{arg\[\*\]\}/$nick/;
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} else {
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$action =~ s/\$arg\[\*\]|\$\{arg\[\*\]\}/$input/;
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}
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next;
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}
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if ($arg =~ m/([^:]*):(.*)/) {
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my $arg1 = $1;
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my $arg2 = $2;
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my $arg1i = $arg1;
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my $arg2i = $arg2;
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$arg1i = 0 if $arg1i eq '';
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$arg2i = $#args if $arg2i eq '';
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$arg2i = $#args if $arg2i > $#args;
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my @values = eval {
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local $SIG{__WARN__} = sub { };
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return @args[$arg1i .. $arg2i];
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};
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if ($@) {
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next;
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} else {
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my $string = join(' ', @values);
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if ($string eq '') {
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$action =~ s/\s*\$\{arg\[$arg1:$arg2\]\}// || $action =~ s/\s*\$arg\[$arg1:$arg2\]//;
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} else {
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$action =~ s/\$\{arg\[$arg1:$arg2\]\}/$string/ || $action =~ s/\$arg\[$arg1:$arg2\]/$string/;
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}
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}
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next;
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}
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my $value = eval {
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local $SIG{__WARN__} = sub { };
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return $args[$arg];
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};
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if ($@) {
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next;
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} else {
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if (not defined $value) {
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if ($arg == 0) {
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$action =~ s/\$\{arg\[$arg\]\}/$nick/ || $action =~ s/\$arg\[$arg\]/$nick/;
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} else {
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$action =~ s/\s*\$\{arg\[$arg\]\}// || $action =~ s/\s*\$arg\[$arg\]//;
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}
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} else {
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$action =~ s/\$arg\{\[$arg\]\}/$value/ || $action =~ s/\$arg\[$arg\]/$value/;
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}
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}
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}
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return $action;
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}
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sub escape_json($self, $text) {
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my $thing = {thing => $text};
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my $json = to_json $thing;
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$json =~ s/^{".*":"//;
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$json =~ s/"}$//;
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return $json;
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}
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sub expand_special_vars($self, $from, $nick, $root_keyword, $action) {
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$action =~ s/(?<!\\)\$nick:json|(?<!\\)\$\{nick:json\}/$self->escape_json($nick)/ge;
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$action =~ s/(?<!\\)\$channel:json|(?<!\\)\$\{channel:json\}/$self->escape_json($from)/ge;
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$action =~
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s/(?<!\\)\$randomnick:json|(?<!\\)\$\{randomnick:json\}/my $random = $self->{pbot}->{nicklist}->random_nick($from); $random ? $self->escape_json($random) : $self->escape_json($nick)/ge;
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$action =~ s/(?<!\\)\$0:json|(?<!\\)\$\{0:json\}/$self->escape_json($root_keyword)/ge;
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$action =~ s/(?<!\\)\$nick|(?<!\\)\$\{nick\}/$nick/g;
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$action =~ s/(?<!\\)\$channel|(?<!\\)\$\{channel\}/$from/g;
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$action =~ s/(?<!\\)\$randomnick|(?<!\\)\$\{randomnick\}/my $random = $self->{pbot}->{nicklist}->random_nick($from); $random ? $random : $nick/ge;
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$action =~ s/(?<!\\)\$0\b|(?<!\\)\$\{0\}\b/$root_keyword/g;
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return validate_string($action, $self->{pbot}->{registry}->get_value('factoids', 'max_content_length'));
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}
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1;
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