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359 lines
9.5 KiB
Perl
359 lines
9.5 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.
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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 Text::Levenshtein qw(fastdistance);
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use Carp ();
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sub new {
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if(ref($_[1]) eq 'HASH') {
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Carp::croak("Options to DualIndexHashObject should be key/value pairs, not hash reference");
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}
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my ($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->{ignore_duplicates} = delete $conf{ignore_duplicates} // 0;
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$self->{hash} = {};
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}
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sub load_hash_add {
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my ($self, $primary_index_key, $secondary_index_key, $hash, $i, $filename) = @_;
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if(defined $hash) {
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if(not $self->{ignore_duplicates} and exists $self->hash->{$primary_index_key}->{$secondary_index_key}) {
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if($i) {
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Carp::croak "Duplicate secondary_index_key '$secondary_index_key' found in $filename around line $i\n";
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} else {
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return undef;
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}
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}
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foreach my $key (keys %$hash) {
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$self->hash->{$primary_index_key}->{$secondary_index_key}->{$key} = $hash->{$key};
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}
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return 1;
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}
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return undef;
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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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if(not open(FILE, "< $filename")) {
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Carp::carp "Skipping loading from file: Couldn't open $filename: $!\n";
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return;
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}
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my ($primary_index_key, $secondary_index_key, $i, $hash);
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$hash = {};
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foreach my $line (<FILE>) {
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$i++;
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$line =~ s/^\s+//;
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$line =~ s/\s+$//;
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if($line =~ /^\[(.*)\]$/) {
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$primary_index_key = $1;
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next;
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}
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if($line =~ /^<(.*)>$/) {
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$secondary_index_key = $1;
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if(not $self->{ignore_duplicates} and exists $self->hash->{$primary_index_key}->{$secondary_index_key}) {
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Carp::croak "Duplicate secondary_index_key '$secondary_index_key' at line $i of $filename\n";
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}
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next;
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}
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if($line eq '') {
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# store the old hash
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$self->load_hash_add($primary_index_key, $secondary_index_key, $hash, $i, $filename);
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# start a new hash
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$hash = {};
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next;
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}
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my ($key, $value) = split /:/, $line, 2;
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$key =~ s/^\s+//;
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$key =~ s/\s+$//;
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$value =~ s/^\s+//;
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$value =~ s/\s+$//;
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if(not length $key or not length $value) {
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Carp::croak "Missing key or value at line $i of $filename\n";
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}
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$hash->{$key} = $value;
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}
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close(FILE);
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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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open(FILE, "> $filename") or die "Couldn't open $filename: $!\n";
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foreach my $primary_index_key (sort keys %{ $self->hash }) {
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print FILE "[$primary_index_key]\n";
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foreach my $secondary_index_key (sort keys %{ $self->hash->{$primary_index_key} }) {
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print FILE "<$secondary_index_key>\n";
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foreach my $key (sort keys %{ $self->hash->{$primary_index_key}->{$secondary_index_key} }) {
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print FILE "$key: " . $self->hash->{$primary_index_key}->{$secondary_index_key}{$key} . "\n";
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}
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print FILE "\n";
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}
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}
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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 find_index {
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my $self = shift;
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my ($primary_index_key, $secondary_index_key) = map {lc} @_;
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return undef if not defined $primary_index_key;
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return undef if not exists $self->hash->{$primary_index_key};
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return $primary_index_key if not defined $secondary_index_key;
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foreach my $index (keys %{ $self->hash->{$primary_index_key} }) {
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return $index if $secondary_index_key eq lc $index;
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}
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return undef;
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}
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sub levenshtein_matches {
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my ($self, $primary_index_key, $secondary_index_key, $distance) = @_;
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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_key = '.*' if not defined $primary_index_key;
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if(not $secondary_index_key) {
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foreach my $index (sort keys %{ $self->hash }) {
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my $distance_result = fastdistance($primary_index_key, $index);
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my $length = (length($primary_index_key) > length($index)) ? length $primary_index_key : length $index;
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if($distance_result / $length < $distance) {
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$result .= $comma . $index;
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$comma = ", ";
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}
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}
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} else {
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my $primary = $self->find_index($primary_index_key);
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if(not $primary) {
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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 = "[$index1] ";
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$header = "[global channel] " if $header eq "[.*] ";
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foreach my $index2 (sort keys %{ $self->hash->{$index1} }) {
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my $distance_result = fastdistance($secondary_index_key, $index2);
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my $length = (length($secondary_index_key) > length($index2)) ? length $secondary_index_key : length $index2;
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if($distance_result / $length < $distance) {
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$header = "" if $last_header eq $header;
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$last_header = $header;
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$result .= $comma . $header . $index2;
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$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_key, $secondary_index_key, $key, $value, $dont_save) = @_;
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my $primary = $self->find_index($primary_index_key);
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if(not $primary) {
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my $result = "No such $self->{name} object [$primary_index_key]; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index_key);
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return $result;
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}
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my $secondary = $self->find_index($primary, $secondary_index_key);
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if(not $secondary) {
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my $result = "No such $self->{name} object [$primary_index_key] $secondary_index_key; similiar matches: ";
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$result .= $self->levenshtein_matches($primary, $secondary_index_key);
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return $result;
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}
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if(not defined $key) {
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my $result = "[" . ($primary eq '.*' ? 'global' : $primary) . "] $secondary keys:\n";
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my $comma = '';
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foreach my $key (sort keys %{ $self->hash->{$primary}->{$secondary} }) {
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$result .= $comma . "$key => " . $self->hash->{$primary}->{$secondary}->{$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 = $self->hash->{$primary}->{$secondary}->{$key};
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} else {
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$self->hash->{$primary}->{$secondary}->{$key} = $value;
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$self->save unless $dont_save;
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}
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$primary = 'global' if $primary eq '.*';
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return "[$primary] $secondary: '$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_key, $secondary_index_key, $key) = @_;
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my $primary = $self->find_index($primary_index_key);
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if(not $primary) {
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my $result = "No such $self->{name} object group '$primary_index_key'; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index_key);
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return $result;
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}
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my $secondary = $self->find_index($primary, $secondary_index_key);
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if(not $secondary) {
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my $result = "No such $self->{name} object '$secondary_index_key'; similiar matches: ";
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$result .= $self->levenshtein_matches($primary, $secondary_index_key);
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return $result;
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}
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delete $self->hash->{$primary}->{$secondary}->{$key};
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$self->save();
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$primary = 'global' if $primary eq '.*';
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return "[$self->{name}] ($primary) $secondary: '$key' unset.";
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}
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sub add {
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my ($self, $primary_index_key, $secondary_index_key, $hash) = @_;
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if($self->load_hash_add($primary_index_key, $secondary_index_key, $hash, 0)) {
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$self->save();
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} else {
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return "Error occurred adding new $self->{name} object.";
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}
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return "'$secondary_index_key' added to $primary_index_key [$self->{name}].";
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}
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sub remove {
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my ($self, $primary_index_key, $secondary_index_key) = @_;
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my $primary = $self->find_index($primary_index_key);
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if(not $primary) {
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my $result = "No such $self->{name} object group '$primary_index_key'; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index_key);
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return $result;
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}
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if(not $secondary_index_key) {
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delete $self->hash->{$primary};
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$self->save;
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return "'$primary' group removed from $self->{name}.";
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}
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my $secondary = $self->find_index($primary, $secondary_index_key);
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if(not $secondary) {
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my $result = "No such $self->{name} object '$secondary_index_key'; similiar matches: ";
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$result .= $self->levenshtein_matches($primary, $secondary_index_key);
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return $result;
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}
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delete $self->hash->{$primary}->{$secondary};
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# remove primary group if no more secondaries
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if(scalar keys %{ $self->hash->{$primary} } == 0) {
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delete $self->hash->{$primary};
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}
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$self->save();
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return "'$secondary' removed from $primary group [$self->{name}].";
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}
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# Getters and setters
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sub hash {
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my $self = shift;
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return $self->{hash};
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}
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sub filename {
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my $self = shift;
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if(@_) { $self->{filename} = shift; }
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return $self->{filename};
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}
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1;
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