Add collaborative surface drawing

drawing/surface_drawing_palette.gd

@@ -0,0 +1,57 @@
+class_name SurfaceDrawingPalette
+extends RefCounted
+
+const DEFAULT_COLOR_ID: StringName = &"chalk_white"
+
+# Stable IDs are the network and future progression boundary. New colors may
+# be appended without changing drawings created with an older palette.
+const COLORS: Array[Dictionary] = [
+	{"id": &"chalk_white", "name": "Chalk white", "color": Color("f5eed9")},
+	{"id": &"ocean_teal", "name": "Ocean teal", "color": Color("35b9c7")},
+	{"id": &"coral", "name": "Coral", "color": Color("ef5b62")},
+	{"id": &"sunny", "name": "Sunny", "color": Color("ffd166")},
+	{"id": &"leaf", "name": "Leaf", "color": Color("46c878")},
+	{"id": &"blue", "name": "Blue", "color": Color("5596f6")},
+	{"id": &"violet", "name": "Violet", "color": Color("b176e8")},
+	{"id": &"charcoal", "name": "Charcoal", "color": Color("28251f")},
+]
+
+
+static func has_color(color_id: StringName) -> bool:
+	return not get_entry(color_id).is_empty()
+
+
+static func get_entry(color_id: StringName) -> Dictionary:
+	for entry: Dictionary in COLORS:
+		if StringName(entry.get("id", &"")) == color_id:
+			return entry
+	return {}
+
+
+static func get_color(color_id: StringName) -> Color:
+	var entry: Dictionary = get_entry(color_id)
+	var value: Variant = entry.get("color", Color.WHITE)
+	return value if typeof(value) == TYPE_COLOR else Color.WHITE
+
+
+static func get_display_name(color_id: StringName) -> String:
+	return str(get_entry(color_id).get("name", "Unknown"))
+
+
+static func get_color_ids() -> Array[StringName]:
+	var result: Array[StringName] = []
+	for entry: Dictionary in COLORS:
+		result.append(StringName(entry.get("id", &"")))
+	return result
+
+
+static func filter_unlocked_ids(
+	unlocked_ids: Array[StringName],
+) -> Array[StringName]:
+	var result: Array[StringName] = []
+	for color_id: StringName in unlocked_ids:
+		if has_color(color_id) and color_id not in result:
+			result.append(color_id)
+	if result.is_empty():
+		result.append(DEFAULT_COLOR_ID)
+	return result