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pbot/PBot/DualIndexHashObject.pm
Pragmatic Software a81ba775fc Restored load, unload, count and histogram commands.
Removed enable/disable commands; use factset instead.

Add default_rate_limit registry entry.

Add newlines to output of DualIndexHashable set() subroutine.
2014-05-24 12:01:59 +00:00

350 lines
9.3 KiB
Perl

# File: DualIndexHashObject.pm
# Author: pragma_
#
# Purpose: Provides a hash-table object with an abstracted API that includes
# setting and deleting values, saving to and loading from files, etc.
package PBot::DualIndexHashObject;
use warnings;
use strict;
use Text::Levenshtein qw(fastdistance);
use Carp ();
sub new {
if(ref($_[1]) eq 'HASH') {
Carp::croak("Options to DualIndexHashObject should be key/value pairs, not hash reference");
}
my ($class, %conf) = @_;
my $self = bless {}, $class;
$self->initialize(%conf);
return $self;
}
sub initialize {
my ($self, %conf) = @_;
$self->{name} = delete $conf{name} // 'Dual Index hash object';
$self->{filename} = delete $conf{filename} // Carp::carp("Missing filename to DualIndexHashObject, will not be able to save to or load from file.");
$self->{ignore_duplicates} = delete $conf{ignore_duplicates} // 0;
$self->{hash} = {};
}
sub load_hash_add {
my ($self, $primary_index_key, $secondary_index_key, $hash, $i, $filename) = @_;
if(defined $hash) {
if(not $self->{ignore_duplicates} and exists $self->hash->{$primary_index_key}->{$secondary_index_key}) {
if($i) {
Carp::croak "Duplicate secondary_index_key '$secondary_index_key' found in $filename around line $i\n";
} else {
return undef;
}
}
foreach my $key (keys %$hash) {
$self->hash->{$primary_index_key}->{$secondary_index_key}->{$key} = $hash->{$key};
}
return 1;
}
return undef;
}
sub load {
my ($self, $filename) = @_;
$filename = $self->filename if not defined $filename;
if(not defined $filename) {
Carp::carp "No $self->{name} filename specified -- skipping loading from file";
return;
}
if(not open(FILE, "< $filename")) {
Carp::carp "Skipping loading from file: Couldn't open $filename: $!\n";
return;
}
my ($primary_index_key, $secondary_index_key, $i, $hash);
$hash = {};
foreach my $line (<FILE>) {
$i++;
$line =~ s/^\s+//;
$line =~ s/\s+$//;
if($line =~ /^\[(.*)\]$/) {
$primary_index_key = $1;
next;
}
if($line =~ /^<(.*)>$/) {
$secondary_index_key = $1;
if(not $self->{ignore_duplicates} and exists $self->hash->{$primary_index_key}->{$secondary_index_key}) {
Carp::croak "Duplicate secondary_index_key '$secondary_index_key' at line $i of $filename\n";
}
next;
}
if($line eq '') {
# store the old hash
$self->load_hash_add($primary_index_key, $secondary_index_key, $hash, $i, $filename);
# start a new hash
$hash = {};
next;
}
my ($key, $value) = split /:/, $line, 2;
$key =~ s/^\s+//;
$key =~ s/\s+$//;
$value =~ s/^\s+//;
$value =~ s/\s+$//;
if(not length $key or not length $value) {
Carp::croak "Missing key or value at line $i of $filename\n";
}
$hash->{$key} = $value;
}
close(FILE);
}
sub save {
my $self = shift;
my $filename;
if(@_) { $filename = shift; } else { $filename = $self->filename; }
if(not defined $filename) {
Carp::carp "No $self->{name} filename specified -- skipping saving to file.\n";
return;
}
open(FILE, "> $filename") or die "Couldn't open $filename: $!\n";
foreach my $primary_index_key (sort keys %{ $self->hash }) {
print FILE "[$primary_index_key]\n";
foreach my $secondary_index_key (sort keys %{ $self->hash->{$primary_index_key} }) {
print FILE "<$secondary_index_key>\n";
foreach my $key (sort keys %{ $self->hash->{$primary_index_key}->{$secondary_index_key} }) {
print FILE "$key: " . $self->hash->{$primary_index_key}->{$secondary_index_key}{$key} . "\n";
}
print FILE "\n";
}
}
close FILE;
}
sub find_index {
my $self = shift;
my ($primary_index_key, $secondary_index_key) = map {lc} @_;
return undef if not defined $primary_index_key;
return $primary_index_key if not $secondary_index_key;
return undef if not exists $self->hash->{$primary_index_key};
foreach my $index (keys %{ $self->hash->{$primary_index_key} }) {
return $index if $secondary_index_key eq lc $index;
}
return undef;
}
sub levenshtein_matches {
my ($self, $primary_index_key, $secondary_index_key, $distance) = @_;
my $comma = '';
my $result = "";
$distance = 0.60 if not defined $distance;
$primary_index_key = '.*' if not defined $primary_index_key;
if(not $secondary_index_key) {
foreach my $index (sort keys %{ $self->hash }) {
my $distance_result = fastdistance($primary_index_key, $index);
my $length = (length($primary_index_key) > length($index)) ? length $primary_index_key : length $index;
if($distance_result / $length < $distance) {
$result .= $comma . $index;
$comma = ", ";
}
}
} else {
my $primary = $self->find_index($primary_index_key);
if(not $primary) {
return 'none';
}
my $last_header = "";
my $header = "";
foreach my $index1 (sort keys %{ $self->hash }) {
$header = "[$index1] ";
$header = "[global channel] " if $header eq "[.*] ";
foreach my $index2 (sort keys %{ $self->hash->{$index1} }) {
my $distance_result = fastdistance($secondary_index_key, $index2);
my $length = (length($secondary_index_key) > length($index2)) ? length $secondary_index_key : length $index2;
if($distance_result / $length < $distance) {
$header = "" if $last_header eq $header;
$last_header = $header;
$result .= $comma . $header . $index2;
$comma = ", ";
}
}
}
}
$result =~ s/(.*), /$1 or /;
$result = 'none' if $comma eq '';
return $result;
}
sub set {
my ($self, $primary_index_key, $secondary_index_key, $key, $value, $dont_save) = @_;
my $primary = $self->find_index($primary_index_key);
if(not $primary) {
my $result = "No such $self->{name} object [$primary_index_key]; similiar matches: ";
$result .= $self->levenshtein_matches($primary_index_key);
return $result;
}
my $secondary = $self->find_index($primary, $secondary_index_key);
if(not $secondary) {
my $result = "No such $self->{name} object [$primary_index_key] $secondary_index_key; similiar matches: ";
$result .= $self->levenshtein_matches($primary, $secondary_index_key);
return $result;
}
if(not defined $key) {
my $result = "[" . ($primary eq '.*' ? 'global' : $primary) . "] $secondary keys:\n";
my $comma = '';
foreach my $key (sort keys %{ $self->hash->{$primary}->{$secondary} }) {
$result .= $comma . "$key => " . $self->hash->{$primary}->{$secondary}->{$key};
$comma = ";\n";
}
$result .= "none" if($comma eq '');
return $result;
}
if(not defined $value) {
$value = $self->hash->{$primary}->{$secondary}->{$key};
} else {
$self->hash->{$primary}->{$secondary}->{$key} = $value;
$self->save unless $dont_save;
}
$primary = 'global' if $primary eq '.*';
return "[$primary] $secondary: '$key' " . (defined $value ? "set to '$value'" : "is not set.");
}
sub unset {
my ($self, $primary_index_key, $secondary_index_key, $key) = @_;
my $primary = $self->find_index($primary_index_key);
if(not $primary) {
my $result = "No such $self->{name} object group '$primary_index_key'; similiar matches: ";
$result .= $self->levenshtein_matches($primary_index_key);
return $result;
}
my $secondary = $self->find_index($primary, $secondary_index_key);
if(not $secondary) {
my $result = "No such $self->{name} object '$secondary_index_key'; similiar matches: ";
$result .= $self->levenshtein_matches($primary, $secondary_index_key);
return $result;
}
delete $self->hash->{$primary}->{$secondary}->{$key};
$self->save();
$primary = 'global' if $primary eq '.*';
return "[$self->{name}] ($primary) $secondary: '$key' unset.";
}
sub add {
my ($self, $primary_index_key, $secondary_index_key, $hash) = @_;
if($self->load_hash_add($primary_index_key, $secondary_index_key, $hash, 0)) {
$self->save();
} else {
return "Error occurred adding new $self->{name} object.";
}
return "'$secondary_index_key' added to $primary_index_key [$self->{name}].";
}
sub remove {
my ($self, $primary_index_key, $secondary_index_key) = @_;
my $primary = $self->find_index($primary_index_key);
if(not $primary) {
my $result = "No such $self->{name} object group '$primary_index_key'; similiar matches: ";
$result .= $self->levenshtein_matches($primary_index_key);
return $result;
}
if(not $secondary_index_key) {
delete $self->hash->{$primary};
$self->save;
return "'$primary' group removed from $self->{name}.";
}
my $secondary = $self->find_index($primary, $secondary_index_key);
if(not $secondary) {
my $result = "No such $self->{name} object '$secondary_index_key'; similiar matches: ";
$result .= $self->levenshtein_matches($primary, $secondary_index_key);
return $result;
}
delete $self->hash->{$primary}->{$secondary};
# remove primary group if no more secondaries
if(scalar keys $self->hash->{$primary} == 0) {
delete $self->hash->{$primary};
}
$self->save();
return "'$secondary' removed from $primary group [$self->{name}].";
}
# Getters and setters
sub hash {
my $self = shift;
return $self->{hash};
}
sub filename {
my $self = shift;
if(@_) { $self->{filename} = shift; }
return $self->{filename};
}
1;