Fix multiplayer presentation and Fishnet synchronization

network/network_player_animation_protocol.gd

@@ -0,0 +1,94 @@
+class_name NetworkPlayerAnimationProtocol
+extends RefCounted
+
+const FORMAT_VERSION: int = 1
+const MAX_STATE_ID_LENGTH: int = 64
+const MAX_ACTION_SEQUENCE: int = 2147483647
+const MAX_ACTION_ELAPSED_SECONDS: float = 86400.0
+
+const LOCOMOTION_IDLE: StringName = &"idle"
+const LOCOMOTION_WALKING: StringName = &"walking"
+const LOCOMOTION_RUNNING: StringName = &"running"
+
+
+static func make_state(
+	locomotion_id: StringName,
+	grounded: bool,
+	action_id: StringName = &"",
+	action_sequence: int = 0,
+	action_elapsed: float = 0.0,
+) -> Dictionary:
+	return {
+		"format_version": FORMAT_VERSION,
+		"locomotion_id": String(locomotion_id),
+		"grounded": grounded,
+		"action": make_action_state(
+			action_id, action_sequence, action_elapsed
+		),
+	}
+
+
+static func make_action_state(
+	action_id: StringName = &"",
+	action_sequence: int = 0,
+	action_elapsed: float = 0.0,
+) -> Dictionary:
+	return {
+		"id": String(action_id),
+		"sequence": action_sequence,
+		"elapsed": action_elapsed,
+	}
+
+
+static func validate_state(value: Variant) -> bool:
+	if typeof(value) != TYPE_DICTIONARY:
+		return false
+	var state: Dictionary = value
+	return (
+		typeof(state.get("format_version")) == TYPE_INT
+		and int(state["format_version"]) == FORMAT_VERSION
+		and valid_state_id(state.get("locomotion_id"), false)
+		and typeof(state.get("grounded")) == TYPE_BOOL
+		and validate_action_state(state.get("action"))
+	)
+
+
+static func validate_action_state(value: Variant) -> bool:
+	if typeof(value) != TYPE_DICTIONARY:
+		return false
+	var action: Dictionary = value
+	if (
+		not valid_state_id(action.get("id"), true)
+		or typeof(action.get("sequence")) != TYPE_INT
+		or typeof(action.get("elapsed")) not in [TYPE_FLOAT, TYPE_INT]
+	):
+		return false
+	var sequence: int = int(action["sequence"])
+	var elapsed: float = float(action["elapsed"])
+	return (
+		sequence >= 0
+		and sequence <= MAX_ACTION_SEQUENCE
+		and is_finite(elapsed)
+		and elapsed >= 0.0
+		and elapsed <= MAX_ACTION_ELAPSED_SECONDS
+	)
+
+
+static func valid_state_id(value: Variant, allow_empty: bool) -> bool:
+	if typeof(value) not in [TYPE_STRING, TYPE_STRING_NAME]:
+		return false
+	var state_id: String = str(value)
+	if state_id.is_empty():
+		return allow_empty
+	if state_id.length() > MAX_STATE_ID_LENGTH:
+		return false
+	for index: int in state_id.length():
+		var codepoint: int = state_id.unicode_at(index)
+		var valid_character: bool = (
+			codepoint >= 97 and codepoint <= 122
+			or codepoint >= 48 and codepoint <= 57
+			or codepoint == 95
+		)
+		if not valid_character:
+			return false
+	return true