Implement custom data save in settings and savegames (#484)

addons/escoria-core/game/core-scripts/esc_game.gd

@@ -282,6 +282,20 @@ func hide_main_menu():
 	pass
 
 
+# Custom function that is meant to apply custom settings. Called right after 
+# Escoria settings file was loaded.
+func apply_custom_settings(custom_settings: Dictionary):
+	pass
+
+
+# Custom function automatically called when save game is created. 
+#
+# *Returns* A Dictionary containing the custom data to be saved within the
+# game file. 
+func get_custom_data() -> Dictionary:
+	return {}
+
+
 # Shows the crash popup when a crash occurs
 #
 # #### Parameters

addons/escoria-core/game/core-scripts/save_data/esc_save_manager.gd

@@ -154,6 +154,8 @@ func _do_save_game(p_savename: String) -> ESCSaveGame:
 	escoria.globals_manager.save_game(save_game)
 	escoria.object_manager.save_game(save_game)
 	escoria.main.save_game(save_game)
+	save_game.custom_data = escoria.game_scene.get_custom_data()
+	
 	return save_game
 
 
@@ -323,6 +325,7 @@ func save_settings():
 	settings_res.speech_volume = escoria.settings.speech_volume
 	settings_res.fullscreen = escoria.settings.fullscreen
 	settings_res.skip_dialog = escoria.settings.skip_dialog
+	settings_res.custom_settings = escoria.settings.custom_settings
 
 	var directory: Directory = Directory.new()
 	if not directory.dir_exists(settings_folder):

addons/escoria-core/game/core-scripts/save_data/esc_savegame.gd

@@ -27,3 +27,6 @@ export var globals: Dictionary = {}
 
 # Escoria objects exported from ESCObjectsManager 
 export var objects: Dictionary = {}
+
+# Custom data
+export var custom_data: Dictionary = {}

addons/escoria-core/game/core-scripts/save_data/esc_savesettings.gd

@@ -41,3 +41,6 @@ export var fullscreen: bool = false
 
 # True if skipping dialogs is allowed
 export var skip_dialog: bool = true
+
+# Dictionary containing all user-defined settings.
+export var custom_settings: Dictionary