Add submarine and refrigeration. Submarine is not invisible yet.

Credits.md

@@ -63,6 +63,7 @@ All the following are from [the Noun Project](https://thenounproject.com) licenc
 * [Tank](https://thenounproject.com/term/tank/1287510/) By corpus delicti for Landship
 * [Warship](https://thenounproject.com/term/warship/1597474/) By zidney for Destroyer
 * [Battleship](https://thenounproject.com/search/?q=battleship&i=1986807) By Vitaliy Gorbachev, KZ for Battleship
+* [Submarine](https://thenounproject.com/search/?q=submarine&i=589519) By Hea Poh Lin, MY
 
 ### Great People
 
@@ -346,6 +347,7 @@ All the following are from [the Noun Project](https://thenounproject.com) licenc
 * [Plastic](https://thenounproject.com/term/plastic/478826/) By Yu luck
 * [Microphone](https://thenounproject.com/term/microphone/470266/) By Viktor Vorobyev for Mass Media
 * [Flight](https://thenounproject.com/term/flight/1014306/) By Genius Icons
+* [Refridgerator](https://thenounproject.com/search/?q=refridgerator&i=1188873) By b farias, CL
 
 ### Information
 * [Pill](https://thenounproject.com/term/pill/780458/) By Alex Arseneau for Pharmaceuticals

android/assets/jsons/Techs.json

@@ -356,13 +356,12 @@
 		techCost: 4505,
 		buildingCost:500,
 		wonderCost:1250,
-		techs:[/*
+		techs:[
 			{
 				name:"Refrigeration",
-				row:4,
-				prerequisites:["Electricity"],
-				baseDescription:"Does nothing since we have no sea tiles - In theory, allows construction of offshore platforms and submarines"
-			},*/
+				row:3,
+				prerequisites:["Biology", "Electricity"], //to do: offshore platform should need this
+			},
 			{
 				name:"Replacable Parts",
 				row:4,
@@ -395,7 +394,7 @@
 			{
 				name:"Electronics",
 				row:5,
-				prerequisites:["Radio"],
+				prerequisites:["Replacable Parts", "Flight"],
 			},
 			{
 				name:"Mass Media",

android/assets/jsons/Units.json

@@ -483,6 +483,17 @@
 		uniques:["Indirect Fire", "Bonus vs City 30%"],
 		hurryCostModifier:20
 	},
+	{
+		name: "Submarine",
+		unitType: "WaterRanged",
+		movement: 5,
+		strength: 35,
+		rangedStrength: 60,
+		cost: 325,
+		requiredTech:"Refrigeration",
+		uniques:["Bonus as Attacker 75%", "Invisible to others", "Can Only Attack Water"], //to do: 3 uniques
+		hurryCostModifier:20
+	},
 	{
 		name:"Great War Infantry",
 		unitType:"Melee",

core/src/com/unciv/logic/battle/BattleDamage.kt

@@ -88,6 +88,12 @@ class BattleDamage{
                     else modifiers[text] = BDM.modificationAmount
                 }
             }
+
+            for (ability in attacker.unit.getUniques()) {
+                val regexResult = Regex("""Bonus as Attacker (\d*)%""").matchEntire(ability) //to do: extend to defender, and penalyy
+                if (regexResult == null) continue
+                modifiers["Attacker Bonus"] = regexResult.groups[1]!!.value.toFloat() / 100
+            }
         }
 
         if (attacker.isMelee()) {