new features, play menu, deck builder, deck selection

scripts/data/DeckManager.gd

@@ -0,0 +1,126 @@
+class_name DeckManager
+extends RefCounted
+
+## DeckManager - Handles deck persistence (save/load)
+
+const DECKS_DIR = "user://decks/"
+
+
+## Save a deck to file
+## Returns true on success
+static func save_deck(deck: Deck, filename: String) -> bool:
+	# Ensure directory exists
+	DirAccess.make_dir_recursive_absolute(DECKS_DIR)
+
+	var path = DECKS_DIR + _sanitize_filename(filename) + ".json"
+	var file = FileAccess.open(path, FileAccess.WRITE)
+	if not file:
+		push_error("DeckManager: Failed to open file for writing: " + path)
+		return false
+
+	var data = deck.to_dict()
+	file.store_string(JSON.stringify(data, "\t"))
+	file.close()
+	return true
+
+
+## Load a deck from file
+## Returns null on failure
+static func load_deck(filename: String) -> Deck:
+	var path = DECKS_DIR + _sanitize_filename(filename) + ".json"
+
+	if not FileAccess.file_exists(path):
+		push_error("DeckManager: File not found: " + path)
+		return null
+
+	var file = FileAccess.open(path, FileAccess.READ)
+	if not file:
+		push_error("DeckManager: Failed to open file for reading: " + path)
+		return null
+
+	var json_text = file.get_as_text()
+	file.close()
+
+	var json = JSON.new()
+	var error = json.parse(json_text)
+	if error != OK:
+		push_error("DeckManager: JSON parse error: " + json.get_error_message())
+		return null
+
+	var data = json.get_data()
+	if not data is Dictionary:
+		push_error("DeckManager: Invalid deck data format")
+		return null
+
+	var deck = Deck.new()
+	deck.from_dict(data)
+	return deck
+
+
+## Delete a deck file
+## Returns true on success
+static func delete_deck(filename: String) -> bool:
+	var path = DECKS_DIR + _sanitize_filename(filename) + ".json"
+
+	if not FileAccess.file_exists(path):
+		return false
+
+	var dir = DirAccess.open(DECKS_DIR)
+	if dir:
+		return dir.remove(_sanitize_filename(filename) + ".json") == OK
+	return false
+
+
+## List all saved decks
+## Returns array of deck names (without .json extension)
+static func list_decks() -> Array[String]:
+	var decks: Array[String] = []
+
+	# Ensure directory exists
+	DirAccess.make_dir_recursive_absolute(DECKS_DIR)
+
+	var dir = DirAccess.open(DECKS_DIR)
+	if not dir:
+		return decks
+
+	dir.list_dir_begin()
+	var filename = dir.get_next()
+	while filename != "":
+		if not dir.current_is_dir() and filename.ends_with(".json"):
+			decks.append(filename.trim_suffix(".json"))
+		filename = dir.get_next()
+	dir.list_dir_end()
+
+	decks.sort()
+	return decks
+
+
+## Check if a deck exists
+static func deck_exists(filename: String) -> bool:
+	var path = DECKS_DIR + _sanitize_filename(filename) + ".json"
+	return FileAccess.file_exists(path)
+
+
+## Generate a unique deck name
+static func generate_unique_name(base_name: String = "New Deck") -> String:
+	var name = base_name
+	var counter = 1
+
+	while deck_exists(name):
+		counter += 1
+		name = "%s %d" % [base_name, counter]
+
+	return name
+
+
+## Sanitize filename to prevent path traversal
+static func _sanitize_filename(filename: String) -> String:
+	# Remove path separators and dangerous characters
+	var sanitized = filename.replace("/", "_").replace("\\", "_")
+	sanitized = sanitized.replace("..", "_").replace(":", "_")
+	# Trim whitespace
+	sanitized = sanitized.strip_edges()
+	# Ensure not empty
+	if sanitized.is_empty():
+		sanitized = "deck"
+	return sanitized