added Gamerules to the GameWorld

src/net/torvald/terrarum/console/SetGR.kt

@@ -0,0 +1,64 @@
+package net.torvald.terrarum.console
+
+import net.torvald.terrarum.INGAME
+import net.torvald.terrarum.ccG
+import net.torvald.terrarum.ccM
+import net.torvald.terrarum.ccW
+import net.torvald.terrarum.modulebasegame.console.SetAV.isNum
+
+/**
+ * Created by minjaesong on 2022-06-03.
+ */
+internal object SetGR : ConsoleCommand {
+    override fun execute(args: Array<String>) {
+        fun parseAVInput(arg: String): Any {
+            var inputval: Any
+
+            try {
+                inputval = Integer(arg) // try for integer
+            }
+            catch (e: NumberFormatException) {
+
+                try {
+                    inputval = arg.toDouble() // try for double
+                }
+                catch (ee: NumberFormatException) {
+                    if (arg.equals("__true", ignoreCase = true)) {
+                        inputval = true
+                    }
+                    else if (arg.equals("__false", ignoreCase = true)) {
+                        inputval = false
+                    }
+                    else {
+                        inputval = arg // string if not number
+                    }
+                }
+            }
+
+            return inputval
+        }
+
+        // setav <id, or blank for player> <av> <val>
+        if (args.size != 3) {
+            printUsage()
+        }
+        else if (args.size == 3) {
+            val newValue = parseAVInput(args[2])
+
+            // check if av is number
+            if (args[1].isNum()) {
+                EchoError("Illegal Gamerule ${args[1]}: Gamerule cannot be a number.")
+                System.err.println("[SetGR] Illegal Gamerule ${args[1]}: Gamerule cannot be a number.")
+                return
+            }
+
+            INGAME.world.gameRules[args[1]] = newValue
+            Echo("${ccW}Set Gamerule $ccM${args[1]} ${ccW}to $ccG$newValue")
+            println("[SetGR] set Gamerule '${args[1]}' to '$newValue'.")
+        }
+    }
+
+    override fun printUsage() {
+        Echo("Usage: setgr <gamerule> <value>")
+    }
+}