# -*- Mode: perl; tab-width: 4; indent-tabs-mode: nil; -*-
################################
# List Module                  #
################################

package BotModules::List;
use vars qw(@ISA);
@ISA = qw(BotModules);
1;

# XXX Wipe entire list command

# RegisterConfig - Called when initialised, should call registerVariables
sub RegisterConfig {
    my $self = shift;
    $self->SUPER::RegisterConfig(@_);
    $self->registerVariables(
      # [ name, save?, settable? ]
        ['lists', 1, 1, {}], # user => 'list name|item 1|item 2||list name|item1|item 2'
        ['preferredLineLength', 1, 1, 80], # the usual
        ['maxItemsInChannel', 1, 1, 20], # max number of items to print in the channel (above this and direct messages are used)
    );
}

sub Help {
    my $self = shift;
    my ($event) = @_;
    return {
            '' => 'A personal list tracker. Store your lists here. You must be authenticated to use this (see \'newuser\'). Use the \'add\' command to add items to a list.',
            'add' => 'Add an item to a personal list. List names shouldn\'t contain the word \'to\' otherwise things will be too ambiguous. Syntax: \'add <thing to add> to <list name> list\', e.g. \'add bug 5693 to critical bug list\'.',
            'remove' => 'Remove an item from a personal list. Syntax: \'remove <thing to add> from <list name> list\', e.g. \'remove bug 5693 from critical bug list\'.',
            'list' => 'List the items in your list. Syntax: \'list items in <name of list> list\', e.g. \'list items in critical bug list\' or just \'critical bug list\'.',
            'lists' => 'Tells you what lists you have set up.',
    };
}

sub Told {
    my $self = shift;
    my ($event, $message) = @_;
    if ($message =~ /^\s*add\s+(\S(?:.*\S)?)\s+to\s+(?:my\s+)?(\S(?:.*\S)?)\s+list[\s!.]*$/osi and $message !~ /\|/o and $event->{'userName'}) {
        $self->AddItem($event, $1, $2);
    } elsif ($message =~ /^\s*remove\s+(\S(?:.*\S)?)\s+from\s+(?:my\s+)?(\S(?:.*\S)?)\s+list[\s!.]*$/osi and $message !~ /\|/o and $event->{'userName'}) {
        $self->RemoveItem($event, $1, $2);
    } elsif ($message =~ /^\s*   (?:examine \s+                      |
                                    list \s+ items \s+ in \s+        |
                                    what (?:\s+is|'s) \s+ (?:in\s+)? )
                                 (?: my \s+ | the \s+ )?
                                 ( \S (?:.*\S)? )
                                \s+ list [\s!?.]* $/osix
             and $message !~ /\|/o and $event->{'userName'}) {
        $self->ListItems($event, $1);
    } elsif ($message =~ /^\s*lists[?\s.!]*$/osi and $event->{'userName'}) {
        $self->ListLists($event, $1);
    } else {
        return $self->SUPER::Told(@_);
    }
    return 0; # dealt with it...
}

sub Baffled {
    my $self = shift;
    my ($event, $message) = @_;
    if ($message =~ /^\s*(\S(?:.*\S)?)\s+list[\s!?.]*$/osi and $message !~ /\|/o and $event->{'userName'}) {
        $self->ListItems($event, $1);
    } else {
        return $self->SUPER::Baffled(@_);
    }
    return 0; # dealt with it...
}

sub Heard {
    my $self = shift;
    my ($event, $message) = @_;
    if ($message =~ /^\s*add\s+(\S(?:.*\S)?)\s+to\s+(?:my\s+)?(\S(?:.*\S)?)\s+list[\s!.]*$/osi and $message !~ /\|/o and $event->{'userName'}) {
        $self->AddItem($event, $1, $2);
    } elsif ($message =~ /^\s*remove\s+(\S(?:.*\S)?)\s+from\s+(?:my\s+)?(\S(?:.*\S)?)\s+list[\s!.]*$/osi and $message !~ /\|/o and $event->{'userName'}) {
        $self->RemoveItem($event, $1, $2);
    } else {
        return $self->SUPER::Told(@_);
    }
    return 0; # dealt with it...
}

sub AddItem {
    my $self = shift;
    my ($event, $what, $list) = @_;
    my @lists = split(/\|\|/o, $self->{'lists'}->{$event->{'userName'}});
    local $" = '\', \'';
    my %lists;
    foreach my $sublist (@lists) {
        my @items = split(/\|/o, $sublist);
        $lists{shift @items} = \@items;
    }
    push(@{$lists{lc $list}}, $what);
    local $" = '|';
    my $compoundLists = '';
    foreach my $list (keys(%lists)) {
        if ($compoundLists ne '') {
            $compoundLists .= '||';
        }
        $compoundLists .= "$list|@{$lists{$list}}";
    }
    $self->{'lists'}->{$event->{'userName'}} = $compoundLists;
    $self->saveConfig();
    $self->say($event, "$event->{'from'}: stored '$what' in '$list' list");
}

sub RemoveItem {
    my $self = shift;
    my ($event, $what, $list) = @_;
    my @lists = split(/\|\|/o, $self->{'lists'}->{$event->{'userName'}});
    local $" = '\', \'';
    my %lists;
    my $removed = 0;
    foreach my $sublist (@lists) {
        my @items = split(/\|/o, $sublist);
        if (lc $list eq $items[0]) {
            my $listName = shift @items;
            foreach my $item (@items) {
                if (lc $what ne lc $item) {
                    push(@{$lists{$listName}}, $item);
                } else {
                    $removed++;
                }
            }
        } else {
            $lists{shift @items} = \@items;
        }
    }
    local $" = '|';
    my $compoundLists = '';
    foreach my $list (keys(%lists)) {
        if ($compoundLists ne '') {
            $compoundLists .= '||';
        }
        $compoundLists .= "$list|@{$lists{$list}}";
    }
    $self->{'lists'}->{$event->{'userName'}} = $compoundLists;
    $self->saveConfig();
    if ($removed) {
        $self->say($event, "$event->{'from'}: removed '$what' from '$list' list");
    } else {
        $self->say($event, "$event->{'from'}: could not find '$what' in '$list' list");
    }
}

sub ListItems {
    my $self = shift;
    my ($event, $list) = @_;
    my @lists = split(/\|\|/o, $self->{'lists'}->{$event->{'userName'}});
    my %lists;
    foreach my $list (@lists) {
        my @items = split(/\|/o, $list);
        $lists{lc shift @items} = \@items;
    }
    if (defined(@{$lists{lc $list}})) {
        my $size = scalar(@{$lists{lc $list}});
        if ($size > $self->{'maxItemsInChannel'}) {
            $self->channelSay($event, "$event->{'from'}: Your $list list contains $size items, which I am /msg'ing you.");
            $self->directSay($event, $self->prettyPrint($self->{'preferredLineLength'}, "Your $list list contains: ", '', ', ', @{$lists{lc $list}}));
        } else {
            $self->say($event, $self->prettyPrint($self->{'preferredLineLength'}, "Your $list list contains: ", $event->{'channel'} eq '' ? '' : "$event->{'from'}: ", ', ', @{$lists{lc $list}}));
        }
    } else {
        $self->say($event, "You don't have a $list list, sorry.");
    }
}

sub ListLists {
    my $self = shift;
    my ($event) = @_;
    my @lists = split(/\|\|/o, $self->{'lists'}->{$event->{'userName'}});
    my @listNames;
    foreach my $list (@lists) {
        my @items = split(/\|/o, $list);
        push(@listNames, $items[0]);
    }
    $self->say($event, $self->prettyPrint($self->{'preferredLineLength'}, "Your lists are: ", $event->{'channel'} eq '' ? '' : "$event->{'from'}: ", ', ', @listNames));
}