M2.6: server rules (PvP, raiding, locks and friends, death penalty, difficulty, wolf grace), chat, admin commands, server console

scripts/net/rules.gd

@@ -0,0 +1,74 @@
+extends RefCounted
+## A dedicated server's rules (docs/MULTIPLAYER_PLAN.md §4): who may use and
+## take down whose things, whether players can hurt each other, what death
+## costs, and how hard the island is. All checked on the server; single
+## player has no rules (everything is yours).
+##
+## Pieces remember who placed them (meta "owner" = player id, "owner_name").
+## Pieces with no owner (placed before M2.6, or by the world) are anyone's.
+
+const DIFFICULTY := {
+	# hunger and diet drain, animal and wolf damage, extra wolves in the pack
+	"easy": {"drain": 0.75, "damage": 0.7, "pack": -1},
+	"normal": {"drain": 1.0, "damage": 1.0, "pack": 0},
+	"hard": {"drain": 1.3, "damage": 1.4, "pack": 1},
+}
+
+static func _cfg() -> RefCounted:
+	var net: Node = (Engine.get_main_loop() as SceneTree).root.get_node_or_null("Net")
+	return net.config if net != null and net.is_server() else null
+
+static func v(k: String) -> Variant:
+	var c := _cfg()
+	return c.v(k) if c != null else null
+
+static func owner_of(piece: Node) -> String:
+	return String(piece.get_meta("owner", "")) if piece != null else ""
+
+static func owner_name(piece: Node) -> String:
+	return String(piece.get_meta("owner_name", "someone"))
+
+## Whether player `id` may open, take from or use `piece` (chests, doors,
+## beds, graves), going by `locks`.
+static func may_use(id: String, piece: Node) -> bool:
+	var c := _cfg()
+	var owner := owner_of(piece)
+	if c == null or owner.is_empty() or owner == id:
+		return true
+	match String(c.v("locks")):
+		"off":
+			return true
+		"owner_and_friends":
+			return c.is_friend(owner, id)
+	return false   # "owner"
+
+## Why `id` can't use `piece` ("" = they can).
+static func use_problem(id: String, piece: Node) -> String:
+	if may_use(id, piece):
+		return ""
+	var what: String = piece.display_name().to_lower() if piece.has_method("display_name") else "that"
+	if piece.item_id == "grave":
+		return "That's %s's grave" % owner_name(piece)
+	return "That %s is %s's (locked)" % [what, owner_name(piece)]
+
+## Taking a piece down: your own, anything you're allowed to use (friends,
+## or locks off), or anyone's if raiding is on.
+static func dismantle_problem(id: String, piece: Node) -> String:
+	if may_use(id, piece) or bool(v("raiding")):
+		return ""
+	return "That's %s's, and raiding is off on this server" % owner_name(piece)
+
+static func pvp() -> bool:
+	return bool(v("pvp"))
+
+static func death_penalty() -> String:
+	var d: Variant = v("death_penalty")
+	return String(d) if d != null else "grave"
+
+static func difficulty(k: String) -> float:
+	var d: Variant = v("difficulty")
+	return float(DIFFICULTY.get(String(d) if d != null else "normal", DIFFICULTY.normal)[k])
+
+static func grace_days() -> int:
+	var g: Variant = v("wolf_grace_days")
+	return clampi(int(g), 0, 10) if g != null else 3