| 1 |
=head1 NAME |
| 2 |
|
| 3 |
NPC_Dialogue |
| 4 |
|
| 5 |
=head1 DESCRIPTION |
| 6 |
|
| 7 |
NPC dialogue support module. |
| 8 |
|
| 9 |
=over 4 |
| 10 |
|
| 11 |
=cut |
| 12 |
|
| 13 |
package NPC_Dialogue; |
| 14 |
|
| 15 |
use strict; |
| 16 |
|
| 17 |
sub has_dialogue($) { |
| 18 |
my ($ob) = @_; |
| 19 |
|
| 20 |
$ob->msg =~ /^\@match /; |
| 21 |
} |
| 22 |
|
| 23 |
sub parse_message($) { |
| 24 |
map [split /\n/, $_, 2], |
| 25 |
grep length, |
| 26 |
split /^\@match /m, |
| 27 |
$_[0] |
| 28 |
} |
| 29 |
|
| 30 |
sub new { |
| 31 |
my ($class, %arg) = @_; |
| 32 |
|
| 33 |
$arg{ob} = $arg{pl}->ob; |
| 34 |
|
| 35 |
my $self = bless { |
| 36 |
%arg, |
| 37 |
}, $class; |
| 38 |
|
| 39 |
$self->{match} ||= [parse_message $self->{npc}->msg]; |
| 40 |
|
| 41 |
$self; |
| 42 |
} |
| 43 |
|
| 44 |
sub greet { |
| 45 |
my ($self) = @_; |
| 46 |
|
| 47 |
$self->tell ("hi") |
| 48 |
} |
| 49 |
|
| 50 |
=item ($reply, @topics) = $dialog->tell ($msg) |
| 51 |
|
| 52 |
Tells the dialog object something and returns its response and optionally |
| 53 |
a number of topics that are refered to by this topic. |
| 54 |
|
| 55 |
It supports a number of command constructs. They have to follow the |
| 56 |
C<@match> directive, and there can be multiple commands that will be |
| 57 |
executed in order. |
| 58 |
|
| 59 |
=over 4 |
| 60 |
|
| 61 |
=item @comment text... |
| 62 |
|
| 63 |
A single-line comment. It will be completely ignored. |
| 64 |
|
| 65 |
=item @parse regex |
| 66 |
|
| 67 |
Parses the message using a perl regular expression (by default |
| 68 |
case-insensitive). Any matches will be available as C<< $match->[$index] |
| 69 |
>>. |
| 70 |
|
| 71 |
If the regular expression does not match, the topic is skipped. |
| 72 |
|
| 73 |
Example: |
| 74 |
|
| 75 |
@match deposit |
| 76 |
@parse deposit (\d+) (\S+) |
| 77 |
@eval bank::deposit $match->[0], $match->[1] |
| 78 |
|
| 79 |
=item @cond perl |
| 80 |
|
| 81 |
Evaluates the given perl code. If it returns false (or causes an |
| 82 |
exception), the topic will be skipped, otherwise topic interpretation is |
| 83 |
resumed. |
| 84 |
|
| 85 |
The following local variables are defined within the expression: |
| 86 |
|
| 87 |
=over 4 |
| 88 |
|
| 89 |
=item $who - The cf::object::player object that initiated the dialogue. |
| 90 |
|
| 91 |
=item $npc - The NPC (or magic_ear etc.) object that is being talked to. |
| 92 |
|
| 93 |
=item $msg - The actual message as passed to this method. |
| 94 |
|
| 95 |
=item $match - An arrayref with previous results from C<@parse>. |
| 96 |
|
| 97 |
=item $state - A hashref that stores state variables associated |
| 98 |
with the NPC and the player, that is, it's values relate to the the |
| 99 |
specific player-NPC interaction and other players will see a different |
| 100 |
state. Useful to react to players in a stateful way. See C<@setstate> and |
| 101 |
C<@ifstate>. |
| 102 |
|
| 103 |
=item $flag - A hashref that stores flags associated with the player and |
| 104 |
can be seen by all NPCs (so better name your flags uniquely). This is |
| 105 |
useful for storing e.g. quest information. See C<@setflag> and C<@ifflag>. |
| 106 |
|
| 107 |
=back |
| 108 |
|
| 109 |
The environment is that standard "map scripting environment", which is |
| 110 |
limited in the type of constructs allowed (no loops, for example). |
| 111 |
|
| 112 |
Here is a example: |
| 113 |
|
| 114 |
=over 4 |
| 115 |
|
| 116 |
=item B<matching for an item name> |
| 117 |
|
| 118 |
@match hi |
| 119 |
@cond grep $_->name =~ /royalty/, $who->inv |
| 120 |
You got royalties there! Wanna have! |
| 121 |
|
| 122 |
You may want to change the C<name> method there to something like C<title>, |
| 123 |
C<slaying> or any other method that is allowed to be called on a |
| 124 |
C<cf::object> here. |
| 125 |
|
| 126 |
=item B<matching for an item name and removing the matched item> |
| 127 |
|
| 128 |
@match found earhorn |
| 129 |
@cond grep $_->slaying =~ /Gramp's walking stick/, $who->inv |
| 130 |
@eval my @g = grep { $_->slaying =~ /Gramp's walking stick/ } $who->inv; $g[0]->decrease_ob_nr (1); |
| 131 |
Thanks for the earhorn! |
| 132 |
|
| 133 |
This example is a bit more complex. The C<@eval> statement will search |
| 134 |
the players inventory for the same term as the C<@cond> and then |
| 135 |
decreases the number of objects used there. |
| 136 |
|
| 137 |
(See also the map: C<scorn/houses/cornerbrook.map> for an example how this is |
| 138 |
used in the real world :-) |
| 139 |
|
| 140 |
=back |
| 141 |
|
| 142 |
=item @eval perl |
| 143 |
|
| 144 |
Like C<@cond>, but proceed regardless of the outcome. |
| 145 |
|
| 146 |
=item @msg perl |
| 147 |
|
| 148 |
Like C<@cond>, but the return value will be stringified and prepended to |
| 149 |
the message. |
| 150 |
|
| 151 |
=item @setstate state value |
| 152 |
|
| 153 |
Sets the named state C<state> to the given C<value>. State values are |
| 154 |
associated with a specific player-NPC pair, so each NPC has its own state |
| 155 |
with respect to a particular player, which makes them useful to store |
| 156 |
information about previous questions and possibly answers. State values |
| 157 |
get reset whenever the NPC gets reset. |
| 158 |
|
| 159 |
See C<@ifstate> for an example. |
| 160 |
|
| 161 |
=item @ifstate state value |
| 162 |
|
| 163 |
Requires that the named C<state> has the given C<value>, otherwise this |
| 164 |
topic is skipped. For more complex comparisons, see C<@cond> with |
| 165 |
C<$state>. Example: |
| 166 |
|
| 167 |
@match quest |
| 168 |
@setstate question quest |
| 169 |
Do you really want to help find the magic amulet of Beeblebrox? |
| 170 |
@match yes |
| 171 |
@ifstate question quest |
| 172 |
Then fetch it, stupid! |
| 173 |
|
| 174 |
=item @setflag flag value |
| 175 |
|
| 176 |
Sets the named flag C<flag> to the given C<value>. Flag values are |
| 177 |
associated with a specific player and can be seen by all NPCs. with |
| 178 |
respect to a particular player, which makes them suitable to store quest |
| 179 |
markers and other information (e.g. reputation/alignment). Flags are |
| 180 |
persistent over the lifetime of a player, so be careful :) |
| 181 |
|
| 182 |
See C<@ifflag> for an example. |
| 183 |
|
| 184 |
=item @ifflag flag value |
| 185 |
|
| 186 |
Requires that the named C<flag> has the given C<value>, otherwise this |
| 187 |
topic is skipped. For more complex comparisons, see C<@cond> with |
| 188 |
C<$flag>. Example: |
| 189 |
|
| 190 |
@match I want to do the quest! |
| 191 |
@setflag kings_quest 1 |
| 192 |
Then seek out Bumblebee in Navar, he will tell you... |
| 193 |
@match I did the quest |
| 194 |
@ifflag kings_quest 1 |
| 195 |
Really, which quets? |
| 196 |
|
| 197 |
And Bumblebee might have: |
| 198 |
|
| 199 |
@match hi |
| 200 |
@ifflag kings_quest |
| 201 |
Hi, I was told you want to do the kings quest? |
| 202 |
|
| 203 |
=item @trigger connected-id [state] |
| 204 |
|
| 205 |
Trigger all objects with the given connected-id. |
| 206 |
|
| 207 |
When the state argument is omitted the trigger is stateful and retains an |
| 208 |
internal state per connected-id. There is a limitation to the use of this: The |
| 209 |
state won't be changed when the connection is triggered by other triggers. So |
| 210 |
be careful when triggering the connection from other objects. |
| 211 |
|
| 212 |
When a state argument is given it should be either 0 or 1. 1 will 'push' the connection |
| 213 |
and 0 will 'release' the connection. This is useful for example when you want to |
| 214 |
let a npc control a door. |
| 215 |
|
| 216 |
Trigger all objects with the given connected-id by 'releasing' the connection. |
| 217 |
|
| 218 |
=item @addtopic topic |
| 219 |
|
| 220 |
Adds the given topic names (separated by C<|>) to the list of topics |
| 221 |
returned. |
| 222 |
|
| 223 |
=back |
| 224 |
|
| 225 |
=cut |
| 226 |
|
| 227 |
sub tell { |
| 228 |
my ($self, $msg) = @_; |
| 229 |
|
| 230 |
my $lcmsg = lc $msg; |
| 231 |
|
| 232 |
topic: |
| 233 |
for my $match (@{ $self->{match} }) { |
| 234 |
for (split /\|/, $match->[0]) { |
| 235 |
if ($_ eq "*" || $lcmsg =~ /\b\Q$_\E\b/i) { |
| 236 |
my $reply = $match->[1]; |
| 237 |
my @kw; |
| 238 |
|
| 239 |
my @replies; |
| 240 |
my @match; # @match/@parse command results |
| 241 |
|
| 242 |
my $state = $self->{npc}{$self->{ob}->name}{dialog_state} ||= {}; |
| 243 |
my $flag = $self->{ob}{dialog_flag} ||= {}; |
| 244 |
|
| 245 |
my %vars = ( |
| 246 |
who => $self->{ob}, |
| 247 |
npc => $self->{npc}, |
| 248 |
state => $state, |
| 249 |
flag => $flag, |
| 250 |
msg => $msg, |
| 251 |
match => \@match, |
| 252 |
); |
| 253 |
|
| 254 |
local $self->{ob}{record_replies} = \@replies; |
| 255 |
|
| 256 |
# now execute @-commands (which can result in a no-match) |
| 257 |
while ($reply =~ s/^\@(\w+)\s*([^\n]*)\n?//) { |
| 258 |
my ($cmd, $args) = ($1, $2); |
| 259 |
|
| 260 |
if ($cmd eq "parse" || $cmd eq "match") { # match is future rename |
| 261 |
no re 'eval'; # default, but make sure |
| 262 |
@match = $msg =~ /$args/i |
| 263 |
or next topic; |
| 264 |
|
| 265 |
} elsif ($cmd eq "comment") { |
| 266 |
# nop |
| 267 |
|
| 268 |
} elsif ($cmd eq "cond") { |
| 269 |
cf::safe_eval $args, %vars |
| 270 |
or next topic; |
| 271 |
|
| 272 |
} elsif ($cmd eq "eval") { |
| 273 |
cf::safe_eval $args, %vars; |
| 274 |
warn "\@eval evaluation error: $@\n" if $@; |
| 275 |
|
| 276 |
} elsif ($cmd eq "msg") { |
| 277 |
push @replies, [$self->{npc}, (scalar cf::safe_eval $args, %vars)]; |
| 278 |
|
| 279 |
} elsif ($cmd eq "setflag") { |
| 280 |
my ($name, $value) = split /\s+/, $args, 2; |
| 281 |
$value ? $flag->{$name} = $value |
| 282 |
: delete $flag->{$name}; |
| 283 |
|
| 284 |
} elsif ($cmd eq "setstate") { |
| 285 |
my ($name, $value) = split /\s+/, $args, 2; |
| 286 |
$value ? $state->{$name} = $value |
| 287 |
: delete $state->{$name}; |
| 288 |
|
| 289 |
} elsif ($cmd eq "ifflag") { |
| 290 |
my ($name, $value) = split /\s+/, $args, 2; |
| 291 |
$flag->{$name} eq $value |
| 292 |
or next topic; |
| 293 |
|
| 294 |
} elsif ($cmd eq "ifstate") { |
| 295 |
my ($name, $value) = split /\s+/, $args, 2; |
| 296 |
$state->{$name} eq $value |
| 297 |
or next topic; |
| 298 |
|
| 299 |
} elsif ($cmd eq "trigger") { |
| 300 |
my ($con, $state) = split /\s+/, $args, 2; |
| 301 |
$con = $con * 1; |
| 302 |
|
| 303 |
if (defined $state) { |
| 304 |
$self->{npc}->map->trigger ($args, $state); |
| 305 |
} else { |
| 306 |
my $rvalue = \$self->{npc}{dialog_trigger}{$con}; |
| 307 |
$self->{npc}->map->trigger ($con, $$rvalue = !$$rvalue); |
| 308 |
} |
| 309 |
|
| 310 |
} elsif ($cmd eq "addtopic") { |
| 311 |
push @kw, split /\|/, $args; |
| 312 |
$self->{add_topic}->(split /\s*\|\s*/, $args) if $self->{add_topic}; |
| 313 |
|
| 314 |
} elsif ($cmd eq "deltopic") { |
| 315 |
# not yet implemented, do it out-of-band |
| 316 |
$self->{del_topic}->(split /\s*\|\s*/, $args) if $self->{del_topic}; |
| 317 |
|
| 318 |
} else { |
| 319 |
warn "unknown dialogue command <$cmd,$args> used (from " . $self->{npc}->msg . ")"; |
| 320 |
} |
| 321 |
} |
| 322 |
|
| 323 |
delete $self->{npc}{$self->{ob}->name}{dialog_state} unless %$state; |
| 324 |
delete $self->{ob}{dialog_flag} unless %$flag; |
| 325 |
|
| 326 |
# combine lines into paragraphs |
| 327 |
$reply =~ s/(?<=\S)\n(?=\w)/ /g; |
| 328 |
$reply =~ s/\n\n/\n/g; |
| 329 |
|
| 330 |
# ignores flags and npc from replies |
| 331 |
$reply = join "\n", (map $_->[1], @replies), $reply; |
| 332 |
|
| 333 |
# now mark up all matching keywords |
| 334 |
for my $match (@{ $self->{match} }) { |
| 335 |
for (sort { (length $b) <=> (length $a) } split /\|/, $match->[0]) { |
| 336 |
if ($reply =~ /\b\Q$_\E\b/i) { |
| 337 |
push @kw, $_; |
| 338 |
last; |
| 339 |
} |
| 340 |
} |
| 341 |
} |
| 342 |
|
| 343 |
return wantarray ? ($reply, @kw) : $reply; |
| 344 |
} |
| 345 |
} |
| 346 |
} |
| 347 |
|
| 348 |
() |
| 349 |
} |
| 350 |
|
| 351 |
1 |
