add "attack_alignment" filter for filter attack with alignment diffre…

…nt of unit alignment

alignment of attack could be filtered in [event][filter_attack] and specials [filter_weapon)(with caution in latest case)

data/schema/filters/weapon.cfg

@@ -18,6 +18,7 @@
 	{SIMPLE_KEY accuracy s_unsigned_range_list}
 	{SIMPLE_KEY movement_used s_unsigned_range_list}
 	{SIMPLE_KEY attacks_used s_unsigned_range_list}
+	{SIMPLE_KEY attack_alignment alignment}
 	{FILTER_BOOLEAN_OPS weapon}
 [/tag]
 

src/units/attack_type.cpp

@@ -110,6 +110,7 @@ static bool matches_simple_filter(const attack_type & attack, const config & fil
 	const std::string& filter_parry = filter["parry"];
 	const std::string& filter_movement = filter["movement_used"];
 	const std::string& filter_attacks_used = filter["attacks_used"];
+	const std::vector<std::string> filter_alignment = utils::split(filter["attack_alignment"]);
 	const std::vector<std::string> filter_name = utils::split(filter["name"]);
 	const std::vector<std::string> filter_type = utils::split(filter["type"]);
 	const std::vector<std::string> filter_special = utils::split(filter["special"]);
@@ -141,6 +142,13 @@ static bool matches_simple_filter(const attack_type & attack, const config & fil
 	if (!filter_attacks_used.empty() && !in_ranges(attack.attacks_used(), utils::parse_ranges_unsigned(filter_attacks_used)))
 		return false;
 
+	if(!filter_alignment.empty() ){
+		std::string attack_alignment = unit_alignments::get_string((attack.specials_alignment()).first);
+		if (std::find(filter_alignment.begin(), filter_alignment.end(), attack_alignment) == filter_alignment.end() ){
+			return false;
+		}
+	}
+
 	if ( !filter_name.empty() && std::find(filter_name.begin(), filter_name.end(), attack.id()) == filter_name.end() )
 		return false;