Add arcade-style high score table, including save and load from disk

game/ScoreBoard/ScoreBoard.gd

@@ -2,14 +2,19 @@ extends Control
 
 onready var scores_column = $Column/ScoresColumn
 
-const score_row = preload("res://ScoreBoard/ScoreRow.tscn")
+const ScoreRow = preload("ScoreRow.tscn")
+const ScoreLoader = preload("ScoreLoader.gd")
 
 func start():
+	var loader := ScoreLoader.new()
+	var scores = loader.get_scores()
 	for i in range(10):
-		var score_instance = score_row.instance()
-		scores_column.add_child(score_instance)
-		score_instance.setup(i)
-		score_instance.start()
+		var row = ScoreRow.instance()
+		scores_column.add_child(row)
+		row.setup(i, scores[i])
+	for row in scores_column.get_children():
+		row.start()
+		yield(get_tree().create_timer(0.07), "timeout")
 
 
 func _ready() -> void:

game/ScoreBoard/ScoreBoard.tscn

-[gd_scene load_steps=4 format=2]
+[gd_scene load_steps=3 format=2]
 
 [ext_resource path="res://ScoreBoard/ScoreBoard.gd" type="Script" id=1]
 [ext_resource path="res://assets/fonts/ScoreTitle.tres" type="DynamicFont" id=2]
-[ext_resource path="res://ScoreBoard/ScoreRow.tscn" type="PackedScene" id=3]
 
 [node name="ScoreBoard" type="Control"]
 anchor_right = 1.0
@@ -36,11 +35,3 @@ margin_right = 840.0
 margin_bottom = 1180.0
 size_flags_vertical = 3
 
-[node name="ScoreRow" parent="Column/ScoresColumn" instance=ExtResource( 3 )]
-anchor_top = 0.0
-anchor_right = 0.0
-anchor_bottom = 0.0
-margin_top = 0.0
-margin_right = 840.0
-margin_bottom = 88.0
-

game/ScoreBoard/ScoreLoader.gd

+"""
+Saves and loads scores to/from the disk
+Each score is a dictionary of the form
+{ initials:String, score:int }
+"""
+
+const SCORES_PATH := "user://scores"
+const SCORE_SECTION := "scores"
+
+const DEFAULT_SCORE := {
+	initials = "RMS",
+	score = 1,
+}
+
+
+func score_file_exists() -> bool:
+	return Directory.new().file_exists(SCORES_PATH)
+
+
+func _get_default_scores() -> Array:
+	var scores := []
+	for i in range(10):
+		scores.append(DEFAULT_SCORE)
+	return scores
+
+
+func save(scores:Array=[]) -> void:
+	if not scores.size() in [0, 10]:
+		return
+
+	if scores == []:
+		scores = _get_default_scores()
+	var file := ConfigFile.new()
+	for i in range(scores.size()):
+		file.set_value(SCORE_SECTION, str(i), scores[i])
+	file.save(SCORES_PATH)
+
+
+func get_scores() -> Array:
+	"""
+	Loads scores from the disk and returns them as a list
+	"""
+	if not score_file_exists():
+		return _get_default_scores()
+
+	var file := ConfigFile.new()
+	if file.load(SCORES_PATH) != OK:
+		return []
+	var scores := []
+	for i in range(10):
+		var score :Dictionary = file.get_value(SCORE_SECTION, str(i), DEFAULT_SCORE)
+		scores.append(score)
+	return scores

game/ScoreBoard/ScoreRow.gd

@@ -9,10 +9,10 @@ const COLOR_TRANSPARENT = Color('00ffffff')
 const COLOR_OPAQUE = Color('00ffffff')
 
 
-func setup(index:int, score:int=1, initials:String="rms") -> void:
+func setup(index:int, score:Dictionary={}) -> void:
 	rank_label.set_rank(index)
-	score_label.text = "%03d" % score
-	initials_label.text = initials
+	score_label.text = "%03d" % score.score
+	initials_label.text = score.initials
 
 
 func start() -> void:

game/ScoreBoard/ScoreRow.tscn

@@ -23,7 +23,7 @@ func set_rank(index:int) -> void:
 
 [sub_resource type="Animation" id=2]
 resource_name = "fade_in"
-length = 0.4
+length = 0.3
 tracks/0/type = "value"
 tracks/0/path = NodePath(".:modulate")
 tracks/0/interp = 1
@@ -31,7 +31,7 @@ tracks/0/loop_wrap = true
 tracks/0/imported = false
 tracks/0/enabled = true
 tracks/0/keys = {
-"times": PoolRealArray( 0, 0.4 ),
+"times": PoolRealArray( 0, 0.3 ),
 "transitions": PoolRealArray( 1, 1 ),
 "update": 0,
 "values": [ Color( 1, 1, 1, 0 ), Color( 1, 1, 1, 1 ) ]