Add parsing support for players command arguments

sources/Commands/Command.uc

@@ -348,7 +348,7 @@ public final function CallData ParseInputWith(
     }
     //  Parse parameters themselves
     commandParser = CommandParser(_.memory.Allocate(class'CommandParser'));
-    callData = commandParser.ParseWith(parser, commandData);
+    callData = commandParser.ParseWith(parser, commandData, callerPlayer);
     callData.targetPlayers = targetPlayers;
     commandParser.FreeSelf();
     return callData;

sources/Commands/CommandParser.uc

@@ -102,6 +102,8 @@ enum ParsingTarget
     CPT_ExtraParameter,
 };
 
+//  Parser for player parameters, setup with a caller for current parsing
+var private PlayersParser           currentPlayersParser;
 //  Current `ParsingTarget`, see it's enum description for more details
 var private ParsingTarget           currentTarget;
 //  `true` means we are parsing parameters for a command's option and
@@ -131,6 +133,10 @@ protected function Finalizer()
 private final function Reset()
 {
     local Command.CallData blankCallData;
+
+    _.memory.Free(currentPlayersParser);
+    currentPlayersParser     = none;
+    //  We didn't create this one and are not meant to free it either
     commandParser           = none;
     nextResult              = blankCallData;
     currentTarget           = CPT_NecessaryParameter;
@@ -197,18 +203,20 @@ private final function PickSubCommand(Command.Data commandData)
  *  Parses user's input given in `parser` using command's information given by
  *  `commandData`.
  *
- *  @param  parser      `Parser`, initialized with user's input that will need
- *      to be parsed as a command's call.
+ *  @param  parser          `Parser`, initialized with user's input that will
+ *  need to be parsed as a command's call.
  *  @param  commandData     Describes what parameters and options should be
  *      expected in user's input. `Text` values from `commandData` can be used
  *      inside resulting `Command.CallData`, so deallocating them can
  *      invalidate returned value.
+ *  @param  callerPlayer    Player that called this command, if applicable.
  *  @return Results of parsing, described by `Command.CallData`.
  *      Returned object is guaranteed to be not `none`.
  */
 public final function Command.CallData ParseWith(
     Parser              parser,
-    Command.Data    commandData)
+    Command.Data        commandData,
+    optional EPlayer    callerPlayer)
 {
     local HashTable         commandParameters;
     //  Temporary object to return `nextResult` while setting variable to `none`
@@ -231,6 +239,9 @@ public final function Command.CallData ParseWith(
     }
     commandParser = parser;
     availableOptions = commandData.options;
+    currentPlayersParser =
+        PlayersParser(_.memory.Allocate(class'PlayersParser'));
+    currentPlayersParser.SetSelf(callerPlayer);
     //  (subcommand) (parameters, possibly with options) and nothing else!
     PickSubCommand(commandData);
     nextResult.subCommandName = pickedSubCommand.name.Copy();
@@ -452,6 +463,9 @@ private final function bool ParseSingleValue(
     else if (expectedParameter.type == CPT_JSON) {
         return ParseJSONValue(parsedParameters, expectedParameter);
     }
+    else if (expectedParameter.type == CPT_Players) {
+        return ParsePlayersValue(parsedParameters, expectedParameter);
+    }
     return false;
 }
 
@@ -636,6 +650,28 @@ private final function bool ParseJSONValue(
     return true;
 }
 
+//      Assumes `commandParser` and `parsedParameters` are not `none`.
+//      Parses a single JSON value into given `parsedParameters`
+//  hash table.
+private final function bool ParsePlayersValue(
+    HashTable           parsedParameters,
+    Command.Parameter   expectedParameter)
+{
+    local ArrayList         resultPlayerList;
+    local array<EPlayer>    targetPlayers;
+
+    currentPlayersParser.ParseWith(commandParser);
+    if (commandParser.Ok()) {
+        targetPlayers = currentPlayersParser.GetPlayers();
+    }
+    else {
+        return false;
+    }
+    resultPlayerList = _.collections.NewArrayList(targetPlayers);
+    _.memory.FreeMany(targetPlayers);
+    RecordParameter(parsedParameters, expectedParameter, resultPlayerList);
+    return true;
+}
 //      Assumes `parsedParameters` is not `none`.
 //      Records `value` for a given `parameter` into a given `parametersArray`.
 //  If parameter is not a list type - simply records `value` as value under