Possibility to liberate a traded city (#6797)

android/assets/jsons/translations/Ukrainian.properties

@@ -1163,7 +1163,7 @@ Vote for World Leader = Вибір світового лідера
 
 # Capturing a city
 
-What would you like to do with the city? = Що ви хочете зробити з цим містом?
+What would you like to do with the city of [cityName]? = Що ви хочете зробити з містом [cityName]?
 Annex = Анексувати
 Annexed cities become part of your regular empire. = Анексовані міста стануть частиною вашої імперії.
 Their citizens generate 2x the unhappiness, unless you build a courthouse. = Їх громадяни породжують вдвійчі більше нещастя, якщо ви не побудуєте будинок суду.
@@ -1180,6 +1180,7 @@ The population will gradually dwindle until the city is destroyed. = Насел
 Original capitals and holy cities cannot be razed. = Початкові столиці та святі міста не можуть бути зруйновані.
 Destroy = Знищити
 Destroying the city instantly razes the city to the ground. = Знищення міста миттєво зрівняє його з землею.
+Keep it = Залишити собі
 Remove your troops in our border immediately! = Негайно приберіть свої війська від нашого кордону!
 Sorry. = Вибачте.
 Never! = Ніколи!

android/assets/jsons/translations/template.properties

@@ -1140,7 +1140,7 @@ Vote for World Leader =
 
 # Capturing a city
 
-What would you like to do with the city? = 
+What would you like to do with the city of [cityName]? = 
 Annex = 
 Annexed cities become part of your regular empire. = 
 Their citizens generate 2x the unhappiness, unless you build a courthouse. = 
@@ -1157,6 +1157,7 @@ The population will gradually dwindle until the city is destroyed. =
 Original capitals and holy cities cannot be razed. = 
 Destroy = 
 Destroying the city instantly razes the city to the ground. = 
+Keep it = 
 Remove your troops in our border immediately! = 
 Sorry. = 
 Never! = 

core/src/com/unciv/logic/city/CityInfoConquestFunctions.kt

@@ -1,4 +1,4 @@
-package com.unciv.logic.city
+package com.unciv.logic.city
 
 import com.unciv.Constants
 import com.unciv.UncivGame
@@ -279,7 +279,7 @@ class CityInfoConquestFunctions(val city: CityInfo){
             // Place palace for newCiv if this is the only city they have
             // This needs to happen _before_ free buildings are added, as somtimes these should 
             // only be placed in the capital, and then there needs to be a capital.
-            if (newCivInfo.cities.count() == 1) {
+            if (newCivInfo.cities.size == 1) {
                 newCivInfo.moveCapitalTo(this)
             }
 

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

@@ -7,6 +7,7 @@ enum class AlertType {
     WarDeclaration,
     FirstContact,
     CityConquered,
+    CityTraded,
     BorderConflict,
     DemandToStopSettlingCitiesNear,
     CitySettledNearOtherCivDespiteOurPromise,

core/src/com/unciv/logic/trade/TradeLogic.kt

@@ -1,7 +1,9 @@
 package com.unciv.logic.trade
 
 import com.unciv.Constants
+import com.unciv.logic.civilization.AlertType
 import com.unciv.logic.civilization.CivilizationInfo
+import com.unciv.logic.civilization.PopupAlert
 import com.unciv.logic.civilization.diplomacy.DiplomacyFlags
 import com.unciv.models.ruleset.ModOptionsConstants
 import com.unciv.models.ruleset.tile.ResourceType
@@ -102,6 +104,13 @@ class TradeLogic(val ourCivilization:CivilizationInfo, val otherCivilization: Ci
                     }
                     to.updateViewableTiles()
                     from.updateViewableTiles()
+
+                    // suggest an option to liberate the city
+                    if (to.isPlayerCivilization()
+                        && city.foundingCiv != ""
+                        && from.civName != city.foundingCiv // can't liberate if the city actually belongs to those guys
+                        && to.civName != city.foundingCiv)  // can't liberate if it's our city
+                      to.popupAlerts.add(PopupAlert(AlertType.CityTraded, city.id))
                 }
                 if (offer.type == TradeType.Treaty) {
                     if (offer.name == Constants.peaceTreaty) to.getDiplomacyManager(from).makePeace()

core/src/com/unciv/ui/worldscreen/AlertPopup.kt

@@ -32,7 +32,8 @@ import java.util.*
  * @see AlertType
  */
 class AlertPopup(val worldScreen: WorldScreen, val popupAlert: PopupAlert): Popup(worldScreen) {
-    fun getCloseButton(text: String, key: Char = Char.MIN_VALUE, action: (() -> Unit)? = null): TextButton {
+
+    private fun getCloseButton(text: String, key: Char = Char.MIN_VALUE, action: (() -> Unit)? = null): TextButton {
         // Popup.addCloseButton is close but AlertPopup needs the flexibility to add these inside a wrapper
         val button = text.toTextButton()
         val buttonAction = {
@@ -92,8 +93,7 @@ class AlertPopup(val worldScreen: WorldScreen, val popupAlert: PopupAlert): Popu
             }
             AlertType.CityConquered -> {
                 val city = worldScreen.gameInfo.getCities().first { it.id == popupAlert.value }
-                addGoodSizedLabel("What would you like to do with the city?", Constants.headingFontSize)
-                        .padBottom(20f).row()
+                addQuestionAboutTheCity(city.name)
                 val conqueringCiv = worldScreen.gameInfo.currentPlayerCiv
 
                 if (city.foundingCiv != ""
@@ -139,6 +139,19 @@ class AlertPopup(val worldScreen: WorldScreen, val popupAlert: PopupAlert): Popu
                     }
                 }
             }
+            AlertType.CityTraded -> {
+                val city = worldScreen.gameInfo.getCities().first { it.id == popupAlert.value }
+                addQuestionAboutTheCity(city.name)
+                val conqueringCiv = worldScreen.gameInfo.currentPlayerCiv
+
+                addLiberateOption(city.foundingCiv) {
+                    city.liberateCity(conqueringCiv)
+                    worldScreen.shouldUpdate = true
+                    close()
+                }
+                addSeparator()
+                add(getCloseButton("Keep it")).row()
+            }
             AlertType.BorderConflict -> {
                 val civInfo = worldScreen.gameInfo.getCivilization(popupAlert.value)
                 addLeaderName(civInfo)
@@ -342,6 +355,11 @@ class AlertPopup(val worldScreen: WorldScreen, val popupAlert: PopupAlert): Popu
         add(responseTable)
     }
 
+    private fun addQuestionAboutTheCity(cityName: String) {
+        addGoodSizedLabel("What would you like to do with the city of [$cityName]?",
+            Constants.headingFontSize).padBottom(20f).row()
+    }
+
     private fun addDestroyOption(destroyAction: () -> Unit) {
         add("Destroy".toTextButton().onClick(function = destroyAction)).row()
         keyPressDispatcher['d'] = destroyAction