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344 lines
11 KiB
Perl
344 lines
11 KiB
Perl
# File: DualIndexHashObject.pm
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# Author: pragma_
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#
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# Purpose: Provides a hash-table object with an abstracted API that includes
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# setting and deleting values, saving to and loading from files, etc. This
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# extends the HashObject with an additional index key. Provides case-insensitive
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# access to both index keys, while preserving original case when displaying the
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# keys.
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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::DualIndexHashObject;
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use warnings;
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use strict;
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use feature 'unicode_strings';
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use Text::Levenshtein qw(fastdistance);
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use JSON;
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use Carp ();
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sub new {
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Carp::croak("Options to DualIndexHashObject should be key/value pairs, not hash reference") if ref($_[1]) eq 'HASH';
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my ($class, %conf) = @_;
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my $self = bless {}, $class;
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$self->initialize(%conf);
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return $self;
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}
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sub initialize {
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my ($self, %conf) = @_;
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$self->{name} = delete $conf{name} // 'Dual Index hash object';
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$self->{filename} = delete $conf{filename} // Carp::carp("Missing filename to DualIndexHashObject, will not be able to save to or load from file.");
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$self->{pbot} = delete $conf{pbot} // Carp::croak("Missing pbot reference to " . __FILE__);
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$self->{hash} = {};
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}
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sub load {
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my ($self, $filename) = @_;
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$filename = $self->{filename} if not defined $filename;
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if (not defined $filename) {
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Carp::carp "No $self->{name} filename specified -- skipping loading from file";
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return;
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}
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$self->{pbot}->{logger}->log("Loading $self->{name} from $filename ...\n");
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if (not open(FILE, "< $filename")) {
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Carp::carp "Skipping loading from file: Couldn't open $filename: $!\n";
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return;
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}
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my $contents = do {
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local $/;
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<FILE>;
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};
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$self->{hash} = decode_json $contents if length $contents;
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close FILE;
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# update existing entries to use _name to preserve case
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# and lowercase any non-lowercased entries
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foreach my $primary_index (keys %{ $self->{hash} }) {
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if (not exists $self->{hash}->{$primary_index}->{_name}) {
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if (lc $primary_index eq $primary_index) {
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$self->{hash}->{$primary_index}->{_name} = $primary_index;
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} else {
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if (exists $self->{hash}->{lc $primary_index}) {
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Carp::croak "Cannot update $self->{name} primary index $primary_index; duplicate object found";
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}
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my $data = delete $self->{hash}->{$primary_index};
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$data->{_name} = $primary_index;
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$primary_index = lc $primary_index;
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$self->{hash}->{$primary_index} = $data;
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}
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}
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foreach my $secondary_index (keys %{ $self->{hash}->{$primary_index} }) {
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next if $secondary_index eq '_name';
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if (not exists $self->{hash}->{$primary_index}->{$secondary_index}->{_name}) {
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if (lc $secondary_index eq $secondary_index) {
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$self->{hash}->{$primary_index}->{$secondary_index}->{_name} = $secondary_index;
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} else {
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if (exists $self->{hash}->{$primary_index}->{lc $secondary_index}) {
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Carp::croak "Cannot update $self->{name} $primary_index sub-object $secondary_index; duplicate object found";
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}
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my $data = delete $self->{hash}->{$primary_index}->{$secondary_index};
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$data->{_name} = $secondary_index;
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$secondary_index = lc $secondary_index;
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$self->{hash}->{$primary_index}->{$secondary_index} = $data;
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}
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}
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}
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}
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}
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sub save {
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my $self = shift;
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my $filename;
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if (@_) { $filename = shift; } else { $filename = $self->{filename}; }
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if (not defined $filename) {
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Carp::carp "No $self->{name} filename specified -- skipping saving to file.\n";
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return;
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}
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$self->{pbot}->{logger}->log("Saving $self->{name} to $filename\n");
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my $json = JSON->new;
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my $json_text = $json->pretty->canonical->utf8->encode($self->{hash});
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open(FILE, "> $filename") or die "Couldn't open $filename: $!\n";
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print FILE "$json_text\n";
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close FILE;
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}
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sub clear {
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my $self = shift;
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$self->{hash} = {};
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}
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sub levenshtein_matches {
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my ($self, $primary_index, $secondary_index, $distance, $strictnamespace) = @_;
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my $comma = '';
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my $result = "";
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$distance = 0.60 if not defined $distance;
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$primary_index = '.*' if not defined $primary_index;
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if (not $secondary_index) {
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foreach my $index (sort keys %{ $self->{hash} }) {
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my $distance_result = fastdistance($primary_index, $index);
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my $length = (length $primary_index > length $index) ? length $primary_index : length $index;
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if ($distance_result / $length < $distance) {
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my $name = $self->{hash}->{$index}->{_name};
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if ($name =~ / /) {
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$result .= $comma . "\"$name\"";
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} else {
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$result .= $comma . $name;
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}
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$comma = ", ";
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}
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}
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} else {
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my $lc_primary_index = lc $primary_index;
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if (not exists $self->{hash}->{$lc_primary_index}) {
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return 'none';
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}
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my $last_header = "";
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my $header = "";
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foreach my $index1 (sort keys %{ $self->{hash} }) {
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$header = "[$self->{hash}->{$index1}->{_name}] ";
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$header = '[global] ' if $header eq '[.*] ';
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if ($strictnamespace) {
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next unless $index1 eq '.*' or $index1 eq $lc_primary_index;
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$header = "" unless $header eq '[global] ';
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}
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foreach my $index2 (sort keys %{ $self->{hash}->{$index1} }) {
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my $distance_result = fastdistance($secondary_index, $index2);
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my $length = (length $secondary_index > length $index2) ? length $secondary_index : length $index2;
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if ($distance_result / $length < $distance) {
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my $name = $self->{hash}->{$index1}->{$index2}->{_name};
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$header = "" if $last_header eq $header;
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$last_header = $header;
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$comma = '; ' if $comma ne '' and $header ne '';
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if ($name =~ / /) {
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$result .= $comma . $header . "\"$name\"";
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} else {
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$result .= $comma . $header . $name;
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}
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$comma = ", ";
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}
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}
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}
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}
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$result =~ s/(.*), /$1 or /;
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$result = 'none' if $comma eq '';
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return $result;
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}
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sub set {
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my ($self, $primary_index, $secondary_index, $key, $value, $dont_save) = @_;
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my $lc_primary_index = lc $primary_index;
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my $lc_secondary_index = lc $secondary_index;
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if (not exists $self->{hash}->{$lc_primary_index}) {
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my $result = "$self->{name}: $primary_index not found; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index);
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return $result;
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}
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if (not exists $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}) {
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my $secondary_text = $secondary_index =~ / / ? "\"$secondary_index\"" : $secondary_index;
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my $result = "$self->{name}: [$self->{hash}->{$lc_primary_index}->{_name}] $secondary_text not found; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index, $secondary_index);
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return $result;
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}
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my $name1 = $self->{hash}->{$lc_primary_index}->{_name};
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my $name2 = $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{_name};
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$name1 = 'global' if $name1 eq '.*';
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$name2 = "\"$name2\"" if $name2 =~ / /;
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if (not defined $key) {
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my $result = "[$name1] $name2 keys:\n";
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my $comma = '';
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foreach my $key (sort keys %{ $self->{hash}->{$lc_primary_index}->{$lc_secondary_index} }) {
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$result .= $comma . "$key => " . $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{$key};
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$comma = ";\n";
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}
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$result .= "none" if ($comma eq '');
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return $result;
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}
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if (not defined $value) {
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$value = $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{$key};
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} else {
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$self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{$key} = $value;
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$self->save unless $dont_save;
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}
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return "[$name1] $name2: $key " . (defined $value ? "set to $value" : "is not set.");
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}
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sub unset {
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my ($self, $primary_index, $secondary_index, $key) = @_;
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my $lc_primary_index = lc $primary_index;
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my $lc_secondary_index = lc $secondary_index;
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if (not exists $self->{hash}->{$lc_primary_index}) {
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my $result = "$self->{name}: $primary_index not found; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index);
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return $result;
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}
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my $name1 = $self->{hash}->{$lc_primary_index}->{_name};
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$name1 = 'global' if $name1 eq '.*';
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if (not exists $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}) {
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my $result = "$self->{name}: [$name1] $secondary_index not found; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index, $secondary_index);
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return $result;
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}
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delete $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{$key};
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$self->save();
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my $name2 = $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{_name};
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$name2 = "\"$name2\"" if $name2 =~ / /;
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return "$self->{name}: [$name1] $name2: $key unset.";
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}
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sub add {
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my ($self, $primary_index, $secondary_index, $data, $dont_save) = @_;
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my $lc_primary_index = lc $primary_index;
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my $lc_secondary_index = lc $secondary_index;
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if (exists $self->{hash}->{$lc_primary_index} and exists $self->{$lc_primary_index}->{$lc_secondary_index}) {
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return "Error: entry already exists";
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}
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if (not exists $self->{hash}->{$lc_primary_index}) {
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$self->{hash}->{$lc_primary_index}->{_name} = $primary_index; # preserve case
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}
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$data->{_name} = $secondary_index; # preserve case
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$self->{hash}->{$lc_primary_index}->{$lc_secondary_index} = {%$data};
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$self->save() unless $dont_save;
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my $name1 = $self->{hash}->{$lc_primary_index}->{_name};
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my $name2 = $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{_name};
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$name1 = 'global' if $name1 eq '.*';
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$name2 = "\"$name2\"" if $name2 =~ / /;
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return "$self->{name}: [$name1]: $name2 added.";
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}
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sub remove {
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my ($self, $primary_index, $secondary_index) = @_;
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my $lc_primary_index = lc $primary_index;
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my $lc_secondary_index = lc $secondary_index;
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if (not exists $self->{hash}->{$lc_primary_index}) {
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my $result = "$self->{name}: $primary_index not found; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index);
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return $result;
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}
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if (not $secondary_index) {
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my $data = delete $self->{hash}->{$lc_primary_index};
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my $name = $data->{_name};
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$name = 'global' if $name eq '.*';
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$self->save;
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return "$self->{name}: $name removed.";
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}
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my $name1 = $self->{hash}->{$lc_primary_index}->{_name};
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$name1 = 'global' if $name1 eq '.*';
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if (not exists $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}) {
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my $result = "$self->{name}: [$name1] $secondary_index not found; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index, $secondary_index);
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return $result;
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}
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my $data = delete $self->{hash}->{$lc_primary_index}->{$lc_secondary_index};
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my $name2 = $data->{_name};
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$name2 = "\"$name2\"" if $name2 =~ / /;
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# remove primary group if no more secondaries
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if (keys %{ $self->{hash}->{$lc_primary_index} } == 0) {
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delete $self->{hash}->{$lc_primary_index};
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}
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$self->save();
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return "$self->{name}: [$name1] $name2 removed.";
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}
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sub exists {
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my ($self, $primary_index, $secondary_index) = @_;
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$primary_index = lc $primary_index;
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$secondary_index = lc $secondary_index;
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return (exists $self->{hash}->{$primary_index} and exists $self->{hash}->{$primary_index}->{$secondary_index});
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}
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1;
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