From 2b5777b1adce02b9386f5f411ee3439b0cd49069 Mon Sep 17 00:00:00 2001
From: Ryan Shepherd <rotaryprophet@gmail.com>
Date: Tue, 25 Sep 2018 16:55:45 -0400
Subject: [PATCH] More advanced scripting

---
 PerlRPG/Game.pm     |  6 +++-
 PerlRPG/Script.pm   | 69 ++++++++++++++++++++++++++++++++++++++++++---
 Resources/script.gs | 18 +++++++-----
 3 files changed, 81 insertions(+), 12 deletions(-)

diff --git a/PerlRPG/Game.pm b/PerlRPG/Game.pm
index 2757590..6433c37 100644
--- a/PerlRPG/Game.pm
+++ b/PerlRPG/Game.pm
@@ -14,7 +14,7 @@ use PerlRPG::Controls;
 use vars qw/$app @ISA @EXPORT @EXPORT_OK/;
 
 @ISA = qw/Exporter/;
-@EXPORT = qw/InitApp Run RunScript GetOption SetOption/;
+@EXPORT = qw/InitApp Run RunScript GetOption SetOption ExitGame/;
 @EXPORT_OK = @EXPORT;
 
 $app = undef;
@@ -45,6 +45,10 @@ sub InitApp {
 	return $app;
 }
 
+sub ExitGame {
+	SetOption('Running', 0);
+}
+
 sub Run {
 	my $tick = SDL::get_ticks();
 	while($opt{'Running'}) {
diff --git a/PerlRPG/Script.pm b/PerlRPG/Script.pm
index b0eba0b..9ea4dd0 100644
--- a/PerlRPG/Script.pm
+++ b/PerlRPG/Script.pm
@@ -24,6 +24,7 @@ my %script_commands = (
 	'Wait'			=> {'sub' => sub {},					'wait'	=> 1},
 	'AddSayer'		=> {'sub' => \&AddSayer,				'wait'	=> 0},
 	'Define'		=> {'sub' => \&DefGameVar,				'wait'	=> 0},
+	'ExitGame'		=> {'sub' => \&PerlRPG::Game::ExitGame,			'wait'	=> 1},
 	
 	'Jump'			=> {'sub' => \&PerlRPG::Script::RunScript,		'wait'	=> 0},
 
@@ -179,8 +180,68 @@ sub AddSayer {
 sub EvalString {
 	my $val = shift(@_);
 	# Perform math calculations and the like
-	LogData(ERROR, "Doing incomplete EvalString for '$val'");
-	return $val;
+
+	# Check for simple numbers
+	if(my($v) = $val=~/^\s*(\d+)\s*$/) {
+		return $v;
+	}
+	
+	#LogData(DEBUG, "Doing complex Eval");
+	# Ensure spacing around tokens
+	while(my($full,$f,$o,$s)=$val=~/((\S)([+-\/\*\(\)\.])(\S))/) {
+		#LogData(DEBUG, "Replacing '$full' with '$f $o $s'");
+		$val=~s/\Q$full\E/$f $o $s/;
+	}
+	while(my($full,$f,$o)=$val=~/((\S)([+-\/\*\(\)\.]))\s/) {
+		#LogData(DEBUG, "Replacing '$full' with '$f $o'");
+		$val=~s/\Q$full\E/$f $o/;
+	}
+	while(my($full,$o,$s)=$val=~/\s(([+-\/\*\(\)\.])(\S))/) {
+		#LogData(DEBUG, "Replacing '$full' with '$o $s'");
+		$val=~s/\Q$full\E/$o $s/;
+	}
+	if($val=~/^[+-\/\*\(\)\.]\S/) {
+		substr($val, 1, 0)=' ';
+		#LogData(DEBUG, "Inserting space after initial character");
+	}
+	if($val=~/\S[+-\/\*\(\)\.]$/) {
+		substr($val, -1, 0)=' ';
+		#LogData(DEBUG, "Inserting space before last character");
+	}
+
+	LogData(DEBUG, "Val is '$val'");
+
+	# Tokenize
+	my @tokens = split(/\s+/,$val);
+
+
+	for(my $i=0;$i<@tokens-0;$i++) { LogData(DEBUG, "Pass 1 Token [%i], '%s'", $i, $tokens[$i]); }
+
+	for(my $i=0;$i<@tokens-0;$i++) {
+		my $t = $tokens[$i];
+		if($i < @tokens-1 && $tokens[$i+1] eq '(') {
+			# This is a function call; Don't replace it
+		} elsif(exists $game_vars{$t}) {
+			# Token matches a game var, replace it
+			$tokens[$i] = GetGameVar($t);
+		} elsif(IsString($tokens[$i])) {
+			# Looks like a string, Call StringSubst on it
+			$tokens[$i] = '"' . StringSubst($tokens[$i]) . '"';
+		}
+	}
+
+	for(my $i=0;$i<@tokens-0;$i++) { LogData(DEBUG, "Pass 2 Token [%i], '%s'", $i, $tokens[$i]); }
+
+	my $eval_str = '$eval_res = ' . join(' ', @tokens) . ';';
+	LogData(DEBUG, "About to eval '$eval_str'");
+	my $eval_res;
+	eval $eval_str;
+	if($@) {
+		LogData(ERROR, "Error in eval: $@");
+		return 0;
+	}
+	LogData(DEBUG, "Got result of '$eval_res'");
+	return $eval_res;
 }
 
 sub StringSubst {
@@ -193,7 +254,7 @@ sub StringSubst {
 
 	while(my($f,$n)=$text=~/(\[(\S+)\])/) {
 		my $v=GetGameVar($n);
-		if(!$v) {
+		if(!defined $v) {
 			$v = '!!INVALID!!';
 		}
 		$text=~s/\Q$f\E/$v/g;
@@ -205,7 +266,7 @@ sub StringSubst {
 
 sub SayLine {
 	my($ref, $text)=@_;
-	LogData(INFO, "%s saying \"%s\"", $ref->{'DisplayName'}, $text);
+	LogData(DEVALL, "%s saying \"%s\"", $ref->{'DisplayName'}, $text);
 
 	$text = StringSubst($text);
 	DrawSpeech($ref, $text);
diff --git a/Resources/script.gs b/Resources/script.gs
index 64627ca..3266171 100644
--- a/Resources/script.gs
+++ b/Resources/script.gs
@@ -1,21 +1,25 @@
 __init__:
 	SetBackground 128 128 128 255
 	SetAssetOption spritesheet.png Animated
-	Define VarName "Foo"
+	Define LoopCount 0
+	Define TestVar 1
 
 	Show aka spritesheet.png 0 0 1 flip
 	Show aka2 spritesheet.png 100 0 2 Reverse
 	Show aka3 spritesheet.png 200 0 3 max_loops=10
 
-	AddSayer h Hermione aka01.png 200 200 200 255
-	AddSayer h2 Hermione aka05.png 255 0 0 255
+	AddSayer h "Hermione" aka01.png 200 200 200 255
+	AddSayer h2 "Topless Hermione" aka05.png 255 0 0 255
 	
 	Jump donothing
 
 donothing:
 	Wait
-	Wait
-	h "Some text here\nNext line"
-	h2 "Say Foo here [VarName]"
-	VarName = "[VarName]."
+	LoopCount=LoopCount+1
+	h "Loop number [LoopCount]"
+	TestVar=lc("Foo").uc(lc("Foo"))
+	h "TestVar [TestVar]"
+	TestVar = uc("[TestVar]")
+	h "TestVar2 [TestVar]"
+	ExitGame
 	Jump donothing