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440 lines
17 KiB
Perl
440 lines
17 KiB
Perl
# File: DualIndexHashObject.pm
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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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#
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# DualIndexHashObject extends the HashObject with an additional index key.
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# Provides case-insensitive access to both index keys, while preserving
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# original case when displaying the keys.
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#
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# Data is stored in working memory for lightning fast performance. If you have
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# a huge amount of data, consider using DualIndexSQLiteObject instead.
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#
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# If a filename is provided, data is written to the file after any modifications.
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# SPDX-FileCopyrightText: 2010-2023 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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package PBot::Core::Storage::DualIndexHashObject;
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use PBot::Imports;
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use Text::Levenshtein::XS qw(distance);
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use JSON;
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sub new($class, %args) {
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my $self = bless {}, $class;
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Carp::croak("Missing pbot reference to " . __FILE__) unless exists $args{pbot};
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$self->{pbot} = delete $args{pbot};
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$self->initialize(%args);
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return $self;
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}
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sub initialize($self, %conf) {
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$self->{name} = $conf{name} // 'unnamed';
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$self->{filename} = $conf{filename} // Carp::carp("Missing filename to DualIndexHashObject, will not be able to save to or load from file.");
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$self->{save_queue_timeout} = $conf{save_queue_timeout} // 0;
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$self->{hash} = {};
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}
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sub load($self, $filename = undef) {
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$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, "< $filename")) {
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$self->{pbot}->{logger}->log("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 ($primary_index ne lc $primary_index) {
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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 (grep { $_ ne '_name' } keys %{$self->{hash}->{$primary_index}}) {
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if (not exists $self->{hash}->{$primary_index}->{$secondary_index}->{_name}) {
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if ($secondary_index ne lc $secondary_index) {
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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} = $data;
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}
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}
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}
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}
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}
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sub save($self, @args) {
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my $filename;
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if (@args) { $filename = shift @args; }
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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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my $subref = sub {
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$self->{pbot}->{logger}->log("Saving $self->{name} to $filename\n");
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if (not $self->get_data('$metadata$', '$metadata$', 'update_version')) {
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$self->add('$metadata$', '$metadata$', { update_version => PBot::VERSION::BUILD_REVISION }, 1, 1);
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}
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$self->set('$metadata$', '$metadata$', 'name', $self->{name}, 1);
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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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if ($self->{save_queue_timeout}) {
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# enqueue the save to prevent save-thrashing
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$self->{pbot}->{event_queue}->replace_subref_or_enqueue_event(
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$subref,
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$self->{save_queue_timeout},
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"save $self->{name}",
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);
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} else {
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# execute it right now
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$subref->();
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}
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}
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sub clear($self) {
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$self->{hash} = {};
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}
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sub levenshtein_matches($self, $primary_index, $secondary_index, $distance = 0.60, $strictnamespace = 0) {
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my $comma = '';
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my $result = "";
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$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 $distance_result = distance($primary_index, $index, 20);
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next if not defined $distance_result;
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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 = $self->get_key_name($index);
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if ($name =~ / /) { $result .= $comma . "\"$name\""; }
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else { $result .= $comma . $name; }
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$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}) { return 'none'; }
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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 = "[" . $self->get_key_name($index1) . "] ";
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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 $distance_result = distance($secondary_index, $index2, 20);
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next if not defined $distance_result;
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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 = $self->get_key_name($index1, $index2);
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$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 =~ / /) { $result .= $comma . $header . "\"$name\""; }
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else { $result .= $comma . $header . $name; }
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$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 $result;
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}
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sub set($self, $primary_index, $secondary_index, $key = undef, $value = undef, $dont_save = 0) {
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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}: [" . $self->get_key_name($lc_primary_index) . "] $secondary_text not found; similiar matches: ";
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$result .= $self->levenshtein_matches($primary_index, $secondary_index);
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return $result;
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}
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my $name1 = $self->get_key_name($lc_primary_index);
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my $name2 = $self->get_key_name($lc_primary_index, $lc_secondary_index);
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$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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next if $key eq '_name';
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$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 $value" : "is not set.");
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}
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sub unset($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 = $self->get_key_name($lc_primary_index);
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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 $name2 = $self->get_key_name($lc_primary_index, $lc_secondary_index);
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$name2 = "\"$name2\"" if $name2 =~ / /;
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if (defined delete $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{$key}) {
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$self->save;
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return "$self->{name}: [$name1] $name2: $key unset.";
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} else {
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return "$self->{name}: [$name1] $name2: $key does not exist.";
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}
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$self->save;
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}
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sub exists($self, $primary_index = undef, $secondary_index = undef, $data_index = undef) {
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return 0 if not defined $primary_index;
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$primary_index = lc $primary_index;
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return 0 if not exists $self->{hash}->{$primary_index};
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return 1 if not defined $secondary_index;
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$secondary_index = lc $secondary_index;
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return 0 if not exists $self->{hash}->{$primary_index}->{$secondary_index};
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return 1 if not defined $data_index;
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return exists $self->{hash}->{$primary_index}->{$secondary_index}->{$data_index};
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}
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sub get_key_name($self, $primary_index, $secondary_index = undef) {
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my $lc_primary_index = lc $primary_index;
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return $lc_primary_index if not exists $self->{hash}->{$lc_primary_index};
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if (not defined $secondary_index) {
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if (exists $self->{hash}->{$lc_primary_index}->{_name}) {
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return $self->{hash}->{$lc_primary_index}->{_name};
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} else {
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return $lc_primary_index;
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}
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}
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my $lc_secondary_index = lc $secondary_index;
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return $lc_secondary_index if not exists $self->{hash}->{$lc_primary_index}->{$lc_secondary_index};
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if (exists $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{_name}) {
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return $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{_name};
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} else {
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return $lc_secondary_index;
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}
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}
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sub get_keys($self, $primary_index = undef, $secondary_index = undef) {
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return grep { $_ ne '$metadata$' } keys %{$self->{hash}} if not defined $primary_index;
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my $lc_primary_index = lc $primary_index;
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if (not defined $secondary_index) {
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return () if not exists $self->{hash}->{$lc_primary_index};
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return grep { $_ ne '_name' and $_ ne '$metadata$' } keys %{$self->{hash}->{$lc_primary_index}};
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}
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my $lc_secondary_index = lc $secondary_index;
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return () if not exists $self->{hash}->{$lc_primary_index}
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or not exists $self->{hash}->{$lc_primary_index}->{$lc_secondary_index};
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return grep { $_ ne '_name' } keys %{$self->{hash}->{lc $primary_index}->{lc $secondary_index}};
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}
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sub get_data($self, $primary_index, $secondary_index = undef, $data_index = undef) {
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$primary_index = lc $primary_index;
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$secondary_index = lc $secondary_index if defined $secondary_index;
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return undef if not exists $self->{hash}->{$primary_index};
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return $self->{hash}->{$primary_index} if not defined $secondary_index;
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return $self->{hash}->{$primary_index}->{$secondary_index} if not defined $data_index;
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return $self->{hash}->{$primary_index}->{$secondary_index}->{$data_index};
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}
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sub add($self, $primary_index, $secondary_index, $data, $dont_save = 0, $quiet = 0) {
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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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# preserve case
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if ($primary_index ne $lc_primary_index) {
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$self->{hash}->{$lc_primary_index}->{_name} = $primary_index;
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}
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}
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if ($secondary_index ne $lc_secondary_index) {
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# preserve case
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$data->{_name} = $secondary_index;
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}
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if (exists $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}) {
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foreach my $key (keys %{$data}) {
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if (not exists $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{$key}) {
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$self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{$key} = $data->{$key};
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}
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}
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} else {
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$self->{hash}->{$lc_primary_index}->{$lc_secondary_index} = $data;
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}
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$self->save() unless $dont_save;
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my $name1 = $self->get_key_name($lc_primary_index);
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my $name2 = $self->get_key_name($lc_primary_index, $lc_secondary_index);
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$name1 = 'global' if $name1 eq '.*';
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$name2 = "\"$name2\"" if $name2 =~ / /;
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$self->{pbot}->{logger}->log("$self->{name}: [$name1]: $name2 added.\n") unless $dont_save or $quiet;
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return "$self->{name}: [$name1]: $name2 added.";
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}
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sub remove($self, $primary_index, $secondary_index = undef, $data_index = undef, $dont_save = 0) {
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my $lc_primary_index = lc $primary_index;
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my $lc_secondary_index = lc $secondary_index if defined $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 defined $secondary_index) {
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my $data = delete $self->{hash}->{$lc_primary_index};
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if (defined $data) {
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my $name = exists $data->{_name} ? $data->{_name} : $lc_primary_index;
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$name = 'global' if $name eq '.*';
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$self->save unless $dont_save;
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return "$self->{name}: $name removed.";
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} else {
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return "$self->{name}: $primary_index does not exist.";
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}
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}
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my $name1 = $self->get_key_name($lc_primary_index);
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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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if (not defined $data_index) {
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my $data = delete $self->{hash}->{$lc_primary_index}->{$lc_secondary_index};
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if (defined $data) {
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my $name2 = exists $data->{_name} ? $data->{_name} : $lc_secondary_index;
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$name2 = "\"$name2\"" if $name2 =~ / /;
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# remove primary group if no more secondaries
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if ((grep { $_ ne '_name' } keys %{$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 unless $dont_save;
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return "$self->{name}: [$name1] $name2 removed.";
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} else {
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return "$self->{name}: [$name1] $secondary_index does not exist.";
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}
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}
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my $name2 = $self->get_key_name($lc_primary_index, $lc_secondary_index);
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if (defined delete $self->{hash}->{$lc_primary_index}->{$lc_secondary_index}->{$data_index}) {
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return "$self->{name}: [$name1] $name2.$data_index removed.";
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} else {
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return "$self->{name}: [$name1] $name2.$data_index does not exist.";
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}
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}
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# for compatibility with DualIndexSQLiteObject
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sub create_metadata { }
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# todo:
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sub get_each { }
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sub get_next { }
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sub get_all { }
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1;
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