Add signals for player's name change

sources/Players/EPlayer.uc

@@ -30,12 +30,9 @@ var private int             consoleLifeVersion;
 //  `PlayerController` reference
 var private NativeActorRef  controller;
 
-//  These variables record name of this player;
-//  `hashedName` is used to track outside changes that bypass our getter/setter.
-var private Text    textName;
-var private string  hashedName;
-
-//  Describes the player's admin status (as defined by standard KF classes)
+/**
+ * Describes the player's admin status (as defined by standard KF classes)
+ */
 enum AdminStatus
 {
     //  Not an admin
@@ -46,6 +43,16 @@ enum AdminStatus
     AS_SilentAdmin
 };
 
+//  Stores all the types of signals `EPlayer` might emit
+struct PlayerSignals
+{
+    var public PlayerAPI_OnPlayerNameChanging_Signal    onNameChanging;
+    var public PlayerAPI_OnPlayerNameChanged_Signal     onNameChanged;
+};
+//  We do not own objects in this structure, but it is created and managed by
+//  `PlayersAPI` and is expected to be allocated during the whole Acedia run.
+var protected PlayerSignals signalsReferences;
+
 protected function Finalizer()
 {
     _.memory.Free(controller);
@@ -74,10 +81,10 @@ protected function Finalizer()
  *  @return `true` if initialization was successful and `false` otherwise.
  */
 public final /* unreal */ function bool Initialize(
-    PlayerController initController)
+    PlayerController    initController,
+    PlayerSignals       playerSignals)
 {
     local Text idHash;
-    local PlayerReplicationInfo myReplicationInfo;
     if (controller != none)     return false; // Already initialized!
     if (initController == none) return false;
 
@@ -91,14 +98,8 @@ public final /* unreal */ function bool Initialize(
         idHash.FreeSelf();
         idHash = none;
     }
+    signalsReferences   = playerSignals;
     controller          = _.unreal.ActorRef(initController);
-    myReplicationInfo = initController.playerReplicationInfo;
-    //  Hash current name
-    if (myReplicationInfo != none)
-    {
-        hashedName  = myReplicationInfo.playerName;
-        textName    = _.text.FromColoredString(hashedName);
-    }
     return true;
 }
 
@@ -121,7 +122,8 @@ public function EInterface Copy()
         return playerCopy;
     }
     playerCopy.identity = identity;
-    playerCopy.Initialize(PlayerController(controller.Get()));
+    playerCopy.Initialize(  PlayerController(controller.Get()),
+                            signalsReferences);
     return playerCopy;
 }
 
@@ -216,16 +218,10 @@ public final function Text GetName()
 {
     local PlayerReplicationInfo myReplicationInfo;
     myReplicationInfo = GetRI();
-    if (myReplicationInfo == none) {
-        return P("").Copy();
+    if (myReplicationInfo != none) {
+        return _.text.FromColoredString(myReplicationInfo.playerName);
     }
-    if (textName != none && myReplicationInfo.playerName == hashedName) {
-        return textName.Copy();
-    }
-    _.memory.Free(textName);
-    hashedName  = myReplicationInfo.playerName;
-    textName    = _.text.FromColoredString(hashedName);
-    return textName.Copy();
+    return P("").Copy();
 }
 
 /**
@@ -236,40 +232,73 @@ public final function Text GetName()
  */
 public final function SetName(Text newPlayerName)
 {
-    local Text.Formatting       endingFormatting;
-    local PlayerReplicationInfo myReplicationInfo;
-    myReplicationInfo = GetRI();
-    if (myReplicationInfo == none) return;
-
-    _.memory.Free(textName);
-    //  Filter both `none` and empty `newPlayerName`, so that we can
-    //  later rely on it having at least one character
-    if (newPlayerName == none || newPlayerName.IsEmpty()) {
-        textName = P("").Copy();
+    local Text                  oldPlayerName;
+    local PlayerReplicationInfo replicationInfo;
+    replicationInfo = GetRI();
+    if (replicationInfo == none) {
+        return;
+    }
+    if (ConvertTextNameIntoString(newPlayerName) == replicationInfo.playerName)
+    {
+        return;
     }
-    else {
-        textName = newPlayerName.Copy();
+    oldPlayerName = _.text.FromFormattedString(replicationInfo.playerName);
+    replicationInfo.playerName = CensorPlayerName(oldPlayerName, newPlayerName);
+    _.memory.Free(oldPlayerName);
 }
-    hashedName = textName.ToColoredString(,, _.color.white);
+
+//  Converts `Text` nickname into a suitable `string` representation.
+private final function string ConvertTextNameIntoString(Text playerName)
+{
+    local string            newPlayerNameAsString;
+    local Text.Formatting   endingFormatting;
+    if (playerName == none) {
+        return "";
+    }
+    newPlayerNameAsString = playerName.ToColoredString(,, _.color.white);
     //      To correctly display nicknames we want to drop default color tag
     //  at the beginning (the one `ToColoredString()` adds if first character
     //  has no defined color).
     //      This is a compatibility consideration with vanilla UIs that use
     //  color codes from `myReplicationInfo.playerName` for displaying nicknames
     //  and whose expected behavior can get broken by default color tag.
-    if (!textName.GetFormatting(0).isColored) {
-        hashedName = Mid(hashedName, 4);
+    if (!playerName.GetFormatting(0).isColored) {
+        newPlayerNameAsString = Mid(newPlayerNameAsString, 4);
     }
     //      This is another compatibility consideration with vanilla UIs: unless
     //  we restore color to neutral white, Killing Floor will paint any chat
     //  messages we send in the color our nickname ended with.
-    endingFormatting = textName.GetFormatting(textName.GetLength() - 1);
+    endingFormatting = playerName.GetFormatting(playerName.GetLength() - 1);
     if (    endingFormatting.isColored
         &&  !_.color.AreEqual(endingFormatting.color, _.color.white, true))
     {
-        hashedName $= _.color.GetColorTag(_.color.white);
+        newPlayerNameAsString $= _.color.GetColorTag(_.color.white);
     }
-    myReplicationInfo.playerName = hashedName;
+    return newPlayerNameAsString;
+}
+
+//  Calls appropriate events to let them modify / "censor" player's new name.
+private final function string CensorPlayerName(
+    Text oldPlayerName,
+    Text newPlayerName)
+{
+    local string        result;
+    local Text          censoredName;
+    local MutableText   mutablePlayerName;
+    if (newPlayerName == none) {
+        return "";
+    }
+    mutablePlayerName = newPlayerName.MutableCopy();
+    //  Let signal handlers alter the name
+    signalsReferences.onNameChanging
+        .Emit(self, oldPlayerName, mutablePlayerName);
+    censoredName = mutablePlayerName.Copy();
+    signalsReferences.onNameChanged.Emit(self, oldPlayerName, censoredName);
+    //  Returns "censored" result
+    result = ConvertTextNameIntoString(censoredName);
+    _.memory.Free(mutablePlayerName);
+    _.memory.Free(censoredName);
+    return result;
 }
 
 //  TODO: replace this, it has no place here

sources/Players/Events/PlayerAPI_OnPlayerNameChanged_Signal.uc

@@ -0,0 +1,39 @@
+/**
+ *  Signal class implementation for `PlayerAPI`'s `OnPlayerNameChanged` signal.
+ *      Copyright 2022 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 PlayerAPI_OnPlayerNameChanged_Signal extends Signal;
+
+public final function Emit(EPlayer player, Text oldName, Text newName)
+{
+    local Slot nextSlot;
+    StartIterating();
+    nextSlot = GetNextSlot();
+    while (nextSlot != none)
+    {
+        PlayerAPI_OnPlayerNameChanged_Slot(nextSlot)
+            .connect(player, oldName, newName);
+        nextSlot = GetNextSlot();
+    }
+    CleanEmptySlots();
+}
+
+defaultproperties
+{
+    relatedSlotClass = class'PlayerAPI_OnPlayerNameChanged_Slot'
+}

sources/Players/Events/PlayerAPI_OnPlayerNameChanged_Slot.uc

@@ -0,0 +1,40 @@
+/**
+ *  Slot class implementation for `PlayerAPI`'s `OnPlayerNameChanged` signal.
+ *      Copyright 2022 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 PlayerAPI_OnPlayerNameChanged_Slot extends Slot;
+
+delegate connect(EPlayer player, Text oldName, Text newName)
+{
+    DummyCall();
+}
+
+protected function Constructor()
+{
+    connect = none;
+}
+
+protected function Finalizer()
+{
+    super.Finalizer();
+    connect = none;
+}
+
+defaultproperties
+{
+}

sources/Players/Events/PlayerAPI_OnPlayerNameChanging_Signal.uc

@@ -0,0 +1,39 @@
+/**
+ *  Signal class implementation for `PlayerAPI`'s `OnPlayerNameChanging` signal.
+ *      Copyright 2022 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 PlayerAPI_OnPlayerNameChanging_Signal extends Signal;
+
+public final function Emit(EPlayer player, Text oldName, MutableText newName)
+{
+    local Slot nextSlot;
+    StartIterating();
+    nextSlot = GetNextSlot();
+    while (nextSlot != none)
+    {
+        PlayerAPI_OnPlayerNameChanging_Slot(nextSlot)
+            .connect(player, oldName, newName);
+        nextSlot = GetNextSlot();
+    }
+    CleanEmptySlots();
+}
+
+defaultproperties
+{
+    relatedSlotClass = class'PlayerAPI_OnPlayerNameChanging_Slot'
+}

sources/Players/Events/PlayerAPI_OnPlayerNameChanging_Slot.uc

@@ -0,0 +1,40 @@
+/**
+ *  Slot class implementation for `PlayerAPI`'s `OnPlayerNameChanging` signal.
+ *      Copyright 2022 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 PlayerAPI_OnPlayerNameChanging_Slot extends Slot;
+
+delegate connect(EPlayer player, Text oldName, MutableText newName)
+{
+    DummyCall();
+}
+
+protected function Constructor()
+{
+    connect = none;
+}
+
+protected function Finalizer()
+{
+    super.Finalizer();
+    connect = none;
+}
+
+defaultproperties
+{
+}

sources/Players/PlayersAPI.uc

@@ -1,6 +1,6 @@
 /**
  *      API that provides functions for working player references (`EPlayer`).
- *      Copyright 2021 Anton Tarasenko
+ *      Copyright 2021 - 2022 Anton Tarasenko
  *------------------------------------------------------------------------------
  * This file is part of Acedia.
  *
@@ -19,7 +19,8 @@
  */
 class PlayersAPI extends AcediaObject
     dependson(ConnectionService)
-    dependson(Text);
+    dependson(Text)
+    dependson(EPlayer);
 
 //  Writer that can be used to write into this player's console
 var private ConsoleWriter   consoleInstance;
@@ -30,12 +31,18 @@ var protected bool connectedToConnectionServer;
 var protected PlayerAPI_OnNewPlayer_Signal  onNewPlayerSignal;
 var protected PlayerAPI_OnLostPlayer_Signal onLostPlayerSignal;
 
+var private EPlayer.PlayerSignals playerSignals;
+
 protected function Constructor()
 {
     onNewPlayerSignal = PlayerAPI_OnNewPlayer_Signal(
         _.memory.Allocate(class'PlayerAPI_OnNewPlayer_Signal'));
     onLostPlayerSignal = PlayerAPI_OnLostPlayer_Signal(
         _.memory.Allocate(class'PlayerAPI_OnLostPlayer_Signal'));
+    playerSignals.onNameChanging = PlayerAPI_OnPlayerNameChanging_Signal(
+        _.memory.Allocate(class'PlayerAPI_OnPlayerNameChanging_Signal'));
+    playerSignals.onNameChanged = PlayerAPI_OnPlayerNameChanged_Signal(
+        _.memory.Allocate(class'PlayerAPI_OnPlayerNameChanged_Signal'));
 }
 
 protected function Finalizer()
@@ -50,8 +57,12 @@ protected function Finalizer()
     }
     _.memory.Free(onNewPlayerSignal);
     _.memory.Free(onLostPlayerSignal);
+    _.memory.Free(playerSignals.onNameChanging);
+    _.memory.Free(playerSignals.onNameChanged);
     onNewPlayerSignal               = none;
     onLostPlayerSignal              = none;
+    playerSignals.onNameChanging    = none;
+    playerSignals.onNameChanged     = none;
 }
 
 /**
@@ -89,6 +100,52 @@ public function PlayerAPI_OnLostPlayer_Slot OnLostPlayerHandle(
     return PlayerAPI_OnLostPlayer_Slot(onLostPlayerSignal.NewSlot(receiver));
 }
 
+/**
+ *  Signal that will be emitted once player's name attempt to change.
+ *
+ *      This signal gives all handlers a change to modify mutable `newName`,
+ *  so the one you are given as a parameter might not be final, since other
+ *  handlers can modify it after you.
+ *      If you simply need to see the final version of the changed name -
+ *  use `OnPlayerNameChanged` instead.
+ *
+ *  [Signature]
+ *  void <slot>(EPlayer affectedPlayer, Text oldName, MutableText newName)
+ *
+ *  @param  affectedPlayer  Player, whos name got changed.
+ *  @param  oldName         Player's old name.
+ *  @param  newName         Player's new name. Can be modified, if you want
+ *      to make corrections.
+ */
+/* SIGNAL */
+public function PlayerAPI_OnPlayerNameChanging_Slot OnPlayerNameChanging(
+    AcediaObject receiver)
+{
+    return PlayerAPI_OnPlayerNameChanging_Slot(playerSignals.onNameChanging
+        .NewSlot(receiver));
+}
+
+/**
+ *  Signal that will be emitted once player's name is changed.
+ *
+ *  This signal simply notifies you of the changed name, if you wish to alter it
+ *  after change caused by someone else, use `OnPlayerNameChanging` instead.
+ *
+ *  [Signature]
+ *  void <slot>(EPlayer affectedPlayer, Text oldName, Text newName)
+ *
+ *  @param  affectedPlayer  Player, whos name got changed.
+ *  @param  oldName         Player's old name.
+ *  @param  newName         Player's new name.
+ */
+/* SIGNAL */
+public function PlayerAPI_OnPlayerNameChanged_Slot OnPlayerNameChanged(
+    AcediaObject receiver)
+{
+    return PlayerAPI_OnPlayerNameChanged_Slot(playerSignals.onNameChanged
+        .NewSlot(receiver));
+}
+
 /**
  *  Return `ConsoleWriter` that can be used to write into every player's
  *  console.
@@ -163,7 +220,7 @@ public final /* unreal */ function EPlayer FromController(
 {
     local EPlayer result;
     result = EPlayer(_.memory.Allocate(class'EPlayer'));
-    result.Initialize(controller);
+    result.Initialize(controller, playerSignals);
     return result;
 }