Add chat prefix config option to Commands feature

sources/Commands/Command.uc

@@ -357,6 +357,10 @@ public final function bool Execute(CallData callData, EPlayer callerPlayer)
         ReportError(callData, callerPlayer);
         return false;
     }
+    callerPlayer.BorrowConsole()
+        .Write(P("Executing command `"))
+        .Write(commandData.name)
+        .Say(P("`"));
     Executed(callData, callerPlayer);
     if (commandData.requiresTarget)
     {

sources/Commands/Commands.uc

@@ -21,8 +21,9 @@ class Commands extends FeatureConfig
     perobjectconfig
     config(AcediaSystem);
 
-var public config bool useChatInput;
-var public config bool useMutateInput;
+var public config bool      useChatInput;
+var public config bool      useMutateInput;
+var public config string    chatCommandPrefix;
 
 protected function AssociativeArray ToData()
 {
@@ -30,27 +31,38 @@ protected function AssociativeArray ToData()
     data = __().collections.EmptyAssociativeArray();
     data.SetBool(P("useChatInput"), useChatInput, true);
     data.SetBool(P("useMutateInput"), useMutateInput, true);
+    data.SetItem(   P("chatCommandPrefix"),
+                    _.text.FromString(chatCommandPrefix), true);
     return data;
 }
 
 protected function FromData(AssociativeArray source)
 {
-    if (source != none)
-    {
-        useChatInput    = source.GetBool(P("useChatInput"));
-        useMutateInput  = source.GetBool(P("useMutateInput"));
+    local Text newChatPrefix;
+    if (source == none) {
+        return;
     }
+    useChatInput    = source.GetBool(P("useChatInput"));
+    useMutateInput  = source.GetBool(P("useMutateInput"));
+    newChatPrefix = source.GetText(P("chatCommandPrefix"));
+    chatCommandPrefix = "!";
+    if (newChatPrefix != none) {
+        chatCommandPrefix = newChatPrefix.ToString();
+    }
+    _.memory.Free(newChatPrefix);
 }
 
 protected function DefaultIt()
 {
-    useChatInput = true;
-    useMutateInput = true;
+    useChatInput        = true;
+    useMutateInput      = true;
+    chatCommandPrefix   = "!";
 }
 
 defaultproperties
 {
     configName = "AcediaSystem"
-    useChatInput    = true
-    useMutateInput  = true
+    useChatInput        = true
+    useMutateInput      = true
+    chatCommandPrefix   = "!"
 }

sources/Commands/Commands_Feature.uc

@@ -29,11 +29,16 @@ var private array<Text>         commandDelimiters;
 var private AssociativeArray    registeredCommands;
 
 //  Setting this to `true` enables players to input commands right in the chat
-//  by prepending them with "!" character.
+//  by prepending them with `chatCommandPrefix`.
+//  Default is `true`.
 var private /*config*/ bool useChatInput;
 //  Setting this to `true` enables players to input commands with "mutate"
 //  console command.
+//  Default is `true`.
 var private /*config*/ bool useMutateInput;
+//  Chat messages, prepended by this prefix will be treated as commands.
+//  Default is "!". Empty values are also treated as "!".
+var private /*config*/ Text chatCommandPrefix;
 
 var LoggerAPI.Definition errCommandDuplicate;
 
@@ -68,6 +73,8 @@ protected function OnDisabled()
         registeredCommands = none;
     }
     commandDelimiters.length = 0;
+    _.memory.Free(chatCommandPrefix);
+    chatCommandPrefix = none;
 }
 
 protected function SwapConfig(FeatureConfig config)
@@ -77,6 +84,8 @@ protected function SwapConfig(FeatureConfig config)
     if (newConfig == none) {
         return;
     }
+    _.memory.Free(chatCommandPrefix);
+    chatCommandPrefix = _.text.FromString(newConfig.chatCommandPrefix);
     if (useChatInput != newConfig.useChatInput)
     {
         useChatInput = newConfig.useChatInput;
@@ -245,9 +254,9 @@ private function bool HandleCommands(
     bool        teamMessage)
 {
     local Parser parser;
-    //  We are only interested in messages that start with "!"
+    //  We are only interested in messages that start with `chatCommandPrefix`
     parser = _.text.Parse(message);
-    if (!parser.Match(P("!")).Ok())
+    if (!parser.Match(chatCommandPrefix).Ok())
     {
         parser.FreeSelf();
         return true;