Add more `GameRule` events

sources/Unreal/GameRules/AcediaGameRules.uc

@@ -21,6 +21,9 @@
 class AcediaGameRules extends GameRules;
 
 var private GameRules_OnFindPlayerStart_Signal      onFindPlayerStartSignal;
+var private GameRules_OnHandleRestartGame_Signal    onHandleRestartGameSignal;
+var private GameRules_OnCheckEndGame_Signal         onCheckEndGameSignal;
+var private GameRules_OnCheckScore_Signal           onCheckScoreSignal;
 var private GameRules_OnOverridePickupQuery_Signal  onOverridePickupQuery;
 var private GameRules_OnNetDamage_Signal            onNetDamage;
 
@@ -31,6 +34,12 @@ public final function Initialize(unrealService service)
     }
     onFindPlayerStartSignal = GameRules_OnFindPlayerStart_Signal(
         service.GetSignal(class'GameRules_OnFindPlayerStart_Signal'));
+    onHandleRestartGameSignal = GameRules_OnHandleRestartGame_Signal(
+        service.GetSignal(class'GameRules_OnHandleRestartGame_Signal'));
+    onCheckEndGameSignal = GameRules_OnCheckEndGame_Signal(
+        service.GetSignal(class'GameRules_OnCheckEndGame_Signal'));
+    onCheckScoreSignal = GameRules_OnCheckScore_Signal(
+        service.GetSignal(class'GameRules_OnCheckScore_Signal'));
     onOverridePickupQuery   = GameRules_OnOverridePickupQuery_Signal(
         service.GetSignal(class'GameRules_OnOverridePickupQuery_Signal'));
     onNetDamage             = GameRules_OnNetDamage_Signal(
@@ -62,6 +71,43 @@ function NavigationPoint FindPlayerStart(
     return result;
 }
 
+function bool HandleRestartGame()
+{
+    local bool result;
+    if (onHandleRestartGameSignal != none) {
+        result = onHandleRestartGameSignal.Emit();
+    }
+    if (nextGameRules != none && nextGameRules.HandleRestartGame()) {
+        return true;
+    }
+    return result;
+}
+
+function bool CheckEndGame(PlayerReplicationInfo winner, string reason)
+{
+    local bool result;
+    result = true;
+    if (onCheckEndGameSignal != none) {
+        result = onCheckEndGameSignal.Emit(winner, reason);
+    }
+    if (nextGameRules != none && !nextGameRules.HandleRestartGame()) {
+        return false;
+    }
+    return result;
+}
+
+function bool CheckScore(PlayerReplicationInfo scorer)
+{
+    local bool result;
+    if (onCheckScoreSignal != none) {
+        result = onCheckScoreSignal.Emit(scorer);
+    }
+    if (nextGameRules != none && nextGameRules.CheckScore(Scorer)) {
+        return true;
+    }
+    return result;
+}
+
 function bool OverridePickupQuery(
     Pawn        other,
     Pickup      item,

sources/Unreal/GameRules/Events/GameRules_OnCheckEndGame_Signal.uc

@@ -0,0 +1,47 @@
+/**
+ *  Signal class implementation for `GameRulesAPI`'s `OnCheckEndGame` signal.
+ *      Copyright 2021 Anton Tarasenko
+ *------------------------------------------------------------------------------
+ * This file is part of Acedia.
+ *
+ * Acedia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Acedia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
+ */
+class GameRules_OnCheckEndGame_Signal extends Signal;
+
+public final function bool Emit(
+    PlayerReplicationInfo   winner,
+    string                  reason)
+{
+    local Slot  nextSlot;
+    local bool  result, nextReply;
+    StartIterating();
+    nextSlot = GetNextSlot();
+    result = true;
+    while (nextSlot != none)
+    {
+        nextReply = GameRules_OnCheckEndGame_Slot(nextSlot)
+            .connect(winner, reason);
+        if (!nextReply && !nextSlot.IsEmpty()) {
+            result = result && nextReply;
+        }
+        nextSlot = GetNextSlot();
+    }
+    CleanEmptySlots();
+    return result;
+}
+
+defaultproperties
+{
+    relatedSlotClass = class'GameRules_OnCheckEndGame_Slot'
+}

sources/Unreal/GameRules/Events/GameRules_OnCheckEndGame_Slot.uc

@@ -0,0 +1,41 @@
+/**
+ *  Slot class implementation for `GameRulesAPI`'s `OnCheckEndGame` signal.
+ *      Copyright 2021 Anton Tarasenko
+ *------------------------------------------------------------------------------
+ * This file is part of Acedia.
+ *
+ * Acedia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Acedia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
+ */
+class GameRules_OnCheckEndGame_Slot extends Slot;
+
+delegate bool connect(PlayerReplicationInfo winner, string reason)
+{
+    DummyCall();
+    return true;
+}
+
+protected function Constructor()
+{
+    connect = none;
+}
+
+protected function Finalizer()
+{
+    super.Finalizer();
+    connect = none;
+}
+
+defaultproperties
+{
+}

sources/Unreal/GameRules/Events/GameRules_OnCheckScore_Signal.uc

@@ -0,0 +1,44 @@
+/**
+ *  Signal class implementation for `GameRulesAPI`'s `OnCheckScore` signal.
+ *      Copyright 2021 Anton Tarasenko
+ *------------------------------------------------------------------------------
+ * This file is part of Acedia.
+ *
+ * Acedia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Acedia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
+ */
+class GameRules_OnCheckScore_Signal extends Signal;
+
+public final function bool Emit(PlayerReplicationInfo scorer)
+{
+    local Slot  nextSlot;
+    local bool  result, nextReply;
+    StartIterating();
+    nextSlot = GetNextSlot();
+    result = true;
+    while (nextSlot != none)
+    {
+        nextReply = GameRules_OnCheckScore_Slot(nextSlot).connect(scorer);
+        if (!nextReply && !nextSlot.IsEmpty()) {
+            result = result && nextReply;
+        }
+        nextSlot = GetNextSlot();
+    }
+    CleanEmptySlots();
+    return result;
+}
+
+defaultproperties
+{
+    relatedSlotClass = class'GameRules_OnCheckScore_Slot'
+}

sources/Unreal/GameRules/Events/GameRules_OnCheckScore_Slot.uc

@@ -0,0 +1,41 @@
+/**
+ *  Slot class implementation for `GameRulesAPI`'s `OnCheckScore` signal.
+ *      Copyright 2021 Anton Tarasenko
+ *------------------------------------------------------------------------------
+ * This file is part of Acedia.
+ *
+ * Acedia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Acedia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
+ */
+class GameRules_OnCheckScore_Slot extends Slot;
+
+delegate bool connect(PlayerReplicationInfo scorer)
+{
+    DummyCall();
+    return true;
+}
+
+protected function Constructor()
+{
+    connect = none;
+}
+
+protected function Finalizer()
+{
+    super.Finalizer();
+    connect = none;
+}
+
+defaultproperties
+{
+}

sources/Unreal/GameRules/Events/GameRules_OnFindPlayerStart_Signal.uc

@@ -22,8 +22,7 @@ class GameRules_OnFindPlayerStart_Signal extends Signal;
 public final function NavigationPoint Emit(
     Controller      player,
     optional byte   inTeam,
-    optional string incomingName
+    optional string incomingName)
-)
 {
     local Slot              nextSlot;
     local NavigationPoint   nextPoint;
@@ -33,7 +32,9 @@ public final function NavigationPoint Emit(
     {
         nextPoint = GameRules_OnFindPlayerStart_Slot(nextSlot)
             .connect(player, inTeam, incomingName);
-        if (nextPoint != none && !nextSlot.IsEmpty()) {
+        if (nextPoint != none && !nextSlot.IsEmpty())
+        {
+            CleanEmptySlots();
             return nextPoint;
         }
         nextSlot = GetNextSlot();

sources/Unreal/GameRules/Events/GameRules_OnHandleRestartGame_Signal.uc

@@ -0,0 +1,44 @@
+/**
+ *  Signal class implementation for `GameRulesAPI`'s
+ *  `OnHandleRestartGame` signal.
+ *      Copyright 2021 Anton Tarasenko
+ *------------------------------------------------------------------------------
+ * This file is part of Acedia.
+ *
+ * Acedia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Acedia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
+ */
+class GameRules_OnHandleRestartGame_Signal extends Signal;
+
+public final function bool Emit()
+{
+    local Slot  nextSlot;
+    local bool  doPrevent, nextResult;
+    StartIterating();
+    nextSlot = GetNextSlot();
+    while (nextSlot != none)
+    {
+        nextResult = GameRules_OnHandleRestartGame_Slot(nextSlot).connect();
+        if (nextResult && !nextSlot.IsEmpty()) {
+            doPrevent = doPrevent || nextResult;
+        }
+        nextSlot = GetNextSlot();
+    }
+    CleanEmptySlots();
+    return doPrevent;
+}
+
+defaultproperties
+{
+    relatedSlotClass = class'GameRules_OnHandleRestartGame_Slot'
+}

sources/Unreal/GameRules/Events/GameRules_OnHandleRestartGame_Slot.uc

@@ -0,0 +1,41 @@
+/**
+ *  Slot class implementation for `GameRulesAPI`'s `OnHandleRestartGame` signal.
+ *      Copyright 2021 Anton Tarasenko
+ *------------------------------------------------------------------------------
+ * This file is part of Acedia.
+ *
+ * Acedia is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Acedia is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Acedia.  If not, see <https://www.gnu.org/licenses/>.
+ */
+class GameRules_OnHandleRestartGame_Slot extends Slot;
+
+delegate bool connect()
+{
+    DummyCall();
+    return false;
+}
+
+protected function Constructor()
+{
+    connect = none;
+}
+
+protected function Finalizer()
+{
+    super.Finalizer();
+    connect = none;
+}
+
+defaultproperties
+{
+}

sources/Unreal/GameRules/Events/GameRules_OnOverridePickupQuery_Signal.uc

@@ -30,7 +30,9 @@ public final function bool Emit(Pawn other, Pickup item, out byte allowPickup)
     {
         shouldOverride = GameRules_OnOverridePickupQuery_Slot(nextSlot)
             .connect(other, item, allowPickup);
-        if (shouldOverride && !nextSlot.IsEmpty()) {
+        if (shouldOverride && !nextSlot.IsEmpty())
+        {
+            CleanEmptySlots();
             return shouldOverride;
         }
         nextSlot = GetNextSlot();

sources/Unreal/GameRules/GameRulesAPI.uc

@@ -20,8 +20,6 @@
  */
 class GameRulesAPI extends AcediaObject;
 
-var private LoggerAPI.Definition errNoService;
-
 /**
  *  Called when game decides on a player's spawn point. If a `NavigationPoint`
  *  is returned, signal propagation will be interrupted and returned value will
@@ -46,15 +44,84 @@ public final function GameRules_OnFindPlayerStart_Slot OnFindPlayerStart(
     local Signal        signal;
     local UnrealService service;
     service = UnrealService(class'UnrealService'.static.Require());
-    if (service == none)
-    {
-        _.logger.Auto(errNoService);
-        return none;
-    }
     signal = service.GetSignal(class'GameRules_OnFindPlayerStart_Signal');
     return GameRules_OnFindPlayerStart_Slot(signal.NewSlot(receiver));
 }
 
+/**
+ *  Called in `GameInfo`'s `RestartGame()` method and allows to prevent
+ *  game's restart.
+ *
+ *  This signal will always be propagated to all registered slots.
+ *
+ *  [Signature]
+ *  bool <slot>()
+ *
+ *  @return `true` if you want to prevent game restart and `false` otherwise.
+ */
+/* SIGNAL */
+public final function GameRules_OnHandleRestartGame_Slot OnHandleRestartGame(
+    AcediaObject receiver)
+{
+    local Signal        signal;
+    local UnrealService service;
+    service = UnrealService(class'UnrealService'.static.Require());
+    signal = service.GetSignal(class'GameRules_OnHandleRestartGame_Signal');
+    return GameRules_OnHandleRestartGame_Slot(signal.NewSlot(receiver));
+}
+
+/**
+ *  Allows modification of game ending conditions.
+ *  Return `false` to prevent game from ending.
+ *
+ *  This signal will always be propagated to all registered slots.
+ *
+ *  [Signature]
+ *  bool <slot>(PlayerReplicationInfo winner, string reason)
+ *
+ *  @param  winner  Replication info of the supposed winner of the game.
+ *  @param  reason  String with a description about how/why `winner` has won.
+ *  @return `false` if you want to prevent game from ending
+ *      and `false` otherwise.
+ */
+/* SIGNAL */
+public final function GameRules_OnCheckEndGame_Slot OnCheckEndGame(
+    AcediaObject receiver)
+{
+    local Signal        signal;
+    local UnrealService service;
+    service = UnrealService(class'UnrealService'.static.Require());
+    signal = service.GetSignal(class'GameRules_OnHandleRestartGame_Signal');
+    return GameRules_OnCheckEndGame_Slot(signal.NewSlot(receiver));
+}
+
+/* CheckScore()
+
+*/
+/**
+ *  Check if this score means the game ends.
+ *
+ *  Return `true` to override `GameInfo`'s `CheckScore()`, or if game was ended
+ *  (with a call to `Level.Game.EndGame()`).
+ *
+ *  [Signature]
+ *  bool <slot>(PlayerReplicationInfo scorer)
+ *
+ *  @param  scorer  For whom to do a score check.
+ *  @return `true` to override `GameInfo`'s `CheckScore()`, or if game was ended
+ *      and `false` otherwise.
+ */
+/* SIGNAL */
+public final function GameRules_OnCheckScore_Slot OnCheckScore(
+    AcediaObject receiver)
+{
+    local Signal        signal;
+    local UnrealService service;
+    service = UnrealService(class'UnrealService'.static.Require());
+    signal = service.GetSignal(class'GameRules_OnCheckScore_Signal');
+    return GameRules_OnCheckScore_Slot(signal.NewSlot(receiver));
+}
+
 /**
  *      When pawn wants to pickup something, `GameRule`s are given a chance to
  *  modify it.  If one of the `Slot`s returns `true`, `allowPickup` will
@@ -82,16 +149,10 @@ public final function GameRules_OnOverridePickupQuery_Slot
     local Signal        signal;
     local UnrealService service;
     service = UnrealService(class'UnrealService'.static.Require());
-    if (service == none)
-    {
-        _.logger.Auto(errNoService);
-        return none;
-    }
     signal = service.GetSignal(class'GameRules_OnOverridePickupQuery_Signal');
     return GameRules_OnOverridePickupQuery_Slot(signal.NewSlot(receiver));
 }
 
-//  TODO: rewrite
 /**
  *      When pawn wants to pickup something, `GameRule`s are given a chance to
  *  modify it.  If one of the `Slot`s returns `true`, `allowPickup` will
@@ -119,11 +180,6 @@ public final function GameRules_OnNetDamage_Slot OnNetDamage(
     local Signal        signal;
     local UnrealService service;
     service = UnrealService(class'UnrealService'.static.Require());
-    if (service == none)
-    {
-        _.logger.Auto(errNoService);
-        return none;
-    }
     signal = service.GetSignal(class'GameRules_OnNetDamage_Signal');
     return GameRules_OnNetDamage_Slot(signal.NewSlot(receiver));
 }
@@ -228,5 +284,4 @@ public final function bool AreAdded(
 
 defaultproperties
 {
-    errNoService = (l=LOG_Error,m="`UnrealService` could not be reached.")
 }

sources/Unreal/UnrealService.uc

@@ -87,6 +87,9 @@ public event Tick(float delta)
 defaultproperties
 {
     serviceSignals(0) = (signalClass=class'GameRules_OnFindPlayerStart_Signal')
-    serviceSignals(1) = (signalClass=class'GameRules_OnOverridePickupQuery_Signal')
+    serviceSignals(1) = (signalClass=class'GameRules_OnHandleRestartGame_Signal')
-    serviceSignals(2) = (signalClass=class'GameRules_OnNetDamage_Signal')
+    serviceSignals(2) = (signalClass=class'GameRules_OnCheckEndGame_Signal')
+    serviceSignals(3) = (signalClass=class'GameRules_OnCheckScore_Signal')
+    serviceSignals(4) = (signalClass=class'GameRules_OnOverridePickupQuery_Signal')
+    serviceSignals(5) = (signalClass=class'GameRules_OnNetDamage_Signal')
 }