Policy branches are unlocked by era

android/assets/jsons/Policies.json

@@ -1,6 +1,7 @@
 [
 	{
 		name:"Tradition",
+		era:"Ancient",
 		description:"+3 culture in capital and increased rate of border expansion",
 		policies:[
 			{
@@ -42,6 +43,7 @@
 		]
 	},{
 		name:"Liberty",
+		era:"Ancient",
 		description:"+1 culture in evey city",
 		policies:[
 			{
@@ -84,6 +86,7 @@
 		]
 	},{
 		name:"Piety",
+		era:"Classical",
 		description:"Building time of culture buildings reduced by 15%",
 		policies:[
 			{
@@ -127,6 +130,7 @@
 	},{
 		name:"Commerce",
 		description:"+25% gold in capital",
+		era:"Medieval",
 		policies:[
 			{
 				name:"Trade Unions",
@@ -168,6 +172,7 @@
 		]
 	},{
 		name:"Rationalism",
+		era:"Renaissance",
 		description:"Production to science conversion in cities increased by 33%",
 		policies:[
 			{
@@ -210,6 +215,7 @@
 		]
 	},{
 		name:"Freedom",
+		era:"Renaissance",
 		description:"+25% great people rate",
 		policies:[
 			{

android/assets/jsons/Units.json

@@ -247,6 +247,8 @@
 		hurryCostModifier:20
 		uniques:["Can move after attacking","No defensive terrain bonus","Penalty vs City 33%","Bonus vs Mounted 50%" ],
 	},
+	
+	// UNITS FROM HERE NEED IMAGES
 	{
 		name:"Rifleman",
 		unitType:"Melee",

core/src/com/unciv/logic/civilization/CivilizationInfo.kt

@@ -9,6 +9,7 @@ import com.unciv.logic.map.RoadStatus
 import com.unciv.logic.map.TileInfo
 import com.unciv.models.gamebasics.Civilization
 import com.unciv.models.gamebasics.GameBasics
+import com.unciv.models.gamebasics.TechEra
 import com.unciv.models.gamebasics.tile.ResourceType
 import com.unciv.models.gamebasics.tile.TileResource
 import com.unciv.models.linq.Counter
@@ -208,4 +209,19 @@ class CivilizationInfo {
     override fun toString(): String {return civName} // for debug
 
     fun isDefeated()= cities.isEmpty() && !getCivUnits().any{it.name=="Settler"}
-}
+    fun getEra(): TechEra {
+        return tech.techsResearched.map { GameBasics.Technologies[it]!! }
+                .map { it.era() }
+                .max()!!
+    }
+}
+
+//enum class DiplomaticStatus{
+//    Peace,
+//    War
+//}
+//
+//class DiplomacyManager {
+//    lateinit var otherCivName:String
+//    var status:DiplomaticStatus = DiplomaticStatus.Peace
+//}

core/src/com/unciv/logic/civilization/PolicyManager.kt

@@ -35,6 +35,7 @@ class PolicyManager {
 
     fun isAdoptable(policy: Policy) = !policy.name.endsWith("Complete")
             && getAdoptedPolicies().containsAll(policy.requires!!)
+            && policy.getBranch().era <= civInfo.getEra()
 
     fun canAdoptPolicy(): Boolean = freePolicies > 0 || storedCulture >= getCultureNeededForNextPolicy()
 
@@ -48,7 +49,7 @@ class PolicyManager {
         adoptedPolicies.add(policy.name)
 
         if (!branchCompletion) {
-            val branch = GameBasics.PolicyBranches[policy.branch]!!
+            val branch = policy.getBranch()
             if (branch.policies.count { isAdopted(it.name) } == branch.policies.size - 1) { // All done apart from branch completion
                 adopt(branch.policies.last(), true) // add branch completion!
             }

core/src/com/unciv/models/gamebasics/Policy.kt

@@ -9,5 +9,9 @@ open class Policy : INamed {
     var row: Int = 0
     var column: Int = 0
     var requires: ArrayList<String>? = null
+
+    fun getBranch():PolicyBranch{
+        return GameBasics.PolicyBranches[branch]!!
+    }
 }
 

core/src/com/unciv/models/gamebasics/PolicyBranch.kt

@@ -2,4 +2,5 @@ package com.unciv.models.gamebasics
 
 class PolicyBranch : Policy() {
     var policies: ArrayList<Policy> = arrayListOf()
+    lateinit var era:TechEra
 }

core/src/com/unciv/models/gamebasics/TechColumn.kt

@@ -1,12 +1,24 @@
 package com.unciv.models.gamebasics
 
-import java.util.ArrayList
+import java.util.*
 
 class TechColumn {
-    @JvmField var columnNumber: Int = 0
-    @JvmField var era: String? = null
-    @JvmField var techs = ArrayList<Technology>()
-    @JvmField var techCost: Int = 0
-    @JvmField var buildingCost: Int = 0
-    @JvmField var wonderCost: Int = 0
+    var columnNumber: Int = 0
+    lateinit var era: TechEra
+    var techs = ArrayList<Technology>()
+    var techCost: Int = 0
+    var buildingCost: Int = 0
+    var wonderCost: Int = 0
 }
+
+
+enum class TechEra{
+    Ancient,
+    Classical,
+    Medieval,
+    Renaissance,
+    Industrial,
+    Modern,
+    Information,
+    Future
+}

core/src/com/unciv/models/gamebasics/Technology.kt

@@ -49,4 +49,6 @@ class Technology : ICivilopedia {
     override fun toString(): String {
         return name
     }
-}
+
+    fun era() = column!!.era
+}

core/src/com/unciv/ui/pickerscreens/PolicyPickerScreen.kt

@@ -89,8 +89,12 @@ class PolicyPickerScreen(internal val civInfo: CivilizationInfo) : PickerScreen(
         }
         pickedPolicy = policy
         var policyText = policy.name + "\r\n" + policy.description + "\r\n"
-        if (!policy.name.endsWith("Complete") && policy.requires!!.isNotEmpty())
-            policyText += "Requires " + policy.requires!!.joinToString()
+        if (!policy.name.endsWith("Complete")){
+            if(policy.requires!!.isNotEmpty())
+                policyText += "Requires " + policy.requires!!.joinToString()
+            else
+                policyText += "Unlocked at "+policy.getBranch().era+" era"
+        }
         descriptionLabel.setText(policyText)
     }
 
@@ -99,8 +103,9 @@ class PolicyPickerScreen(internal val civInfo: CivilizationInfo) : PickerScreen(
         if (image) {
             val policyImage = ImageGetter.getImage("PolicyIcons/" + policy.name.replace(" ", "_") + "_(Civ5).png")
             policyButton.add(policyImage).size(30f)
-        } else
+        } else {
             policyButton = TextButton(policy.name, CameraStageBaseScreen.skin)
+        }
 
         if (civInfo.policies.isAdopted(policy.name)) { // existing
             policyButton.color = Color.GREEN