feat: add persistent high score

The save file is located in user://save.json.

Author: danielzting

scenes/levels.tscn

@@ -35,6 +35,17 @@ margin_top = 20.0
 margin_right = 283.0
 margin_bottom = 640.0
 
+[node name="LevelsContainer" type="HBoxContainer" parent="LevelSelect/LevelsBorder/Levels"]
+margin_right = 263.0
+
+[node name="Buttons" type="VBoxContainer" parent="LevelSelect/LevelsBorder/Levels/LevelsContainer"]
+margin_right = 255.0
+size_flags_horizontal = 3
+
+[node name="Scores" type="VBoxContainer" parent="LevelSelect/LevelsBorder/Levels/LevelsContainer"]
+margin_left = 263.0
+margin_right = 263.0
+
 [node name="Label" type="Label" parent="LevelSelect/LevelsBorder"]
 margin_left = 20.0
 margin_top = 577.0

scripts/levels.gd

@@ -10,32 +10,44 @@ const LEVELS = [
 const MIN_WAIT = 1.0 / 32 # Should be greater than maximum frame time
 const MAX_WAIT = 4
 const MIN_SIZE = 8
-const MAX_SIZE = 128
+const MAX_SIZE = 256
 
 var _level = LEVELS[0].new(ArrayModel.new(
     GlobalScene.get_param("size", ArrayModel.DEFAULT_SIZE)))
 
 func _ready():
+    var buttons = $LevelsBorder/Levels/LevelsContainer/Buttons
     for level in LEVELS:
         var button = Button.new()
         button.text = level.NAME
         button.align = Button.ALIGN_LEFT
         button.connect("focus_entered", self, "_on_Button_focus_entered")
         button.connect("pressed", self, "_on_Button_pressed", [level])
-        $LevelsBorder/Levels.add_child(button)
-        # Autofocus last played level
-        if GlobalScene.get_param("level") == level:
+        buttons.add_child(button)
+        var score = Label.new()
+        score.align = Label.ALIGN_RIGHT
+        $LevelsBorder/Levels/LevelsContainer/Scores.add_child(score)
+    # Autofocus last played level
+    for button in buttons.get_children():
+        if button.text == _level.NAME:
             button.grab_focus()
-    var top_button = $LevelsBorder/Levels.get_children()[0]
-    var bottom_button = $LevelsBorder/Levels.get_children()[-1]
+    var top_button = buttons.get_children()[0]
+    var bottom_button = buttons.get_children()[-1]
     # Allow looping from ends of list
     top_button.focus_neighbour_top = bottom_button.get_path()
     bottom_button.focus_neighbour_bottom = top_button.get_path()
-    # If no last played level, autofocus first level
-    if GlobalScene.get_param("level") == null:
-        top_button.grab_focus()
 
 func _on_Button_focus_entered(size=_level.array.size):
+    # Update high scores
+    var buttons = $LevelsBorder/Levels/LevelsContainer/Buttons
+    var scores = $LevelsBorder/Levels/LevelsContainer/Scores
+    var save = GlobalScene.read_save()
+    for i in range(LEVELS.size()):
+        var name = buttons.get_child(i).text
+        if name in save and str(size) in save[name]:
+            scores.get_child(i).text = "%.3f" % save[name][str(size)]
+        else:
+            scores.get_child(i).text = "INF"
     # Pause a bit to show completely sorted array
     if _level.array.is_sorted():
         $Timer.stop()

scripts/play.gd

@@ -47,6 +47,15 @@ func _on_Level_done():
     $HUDBorder/HUD.add_child(back)
     $HUDBorder/HUD.add_child(result)
     restart.grab_focus()
+    var save = GlobalScene.read_save()
+    var name = _level.NAME
+    var size = str(GlobalScene.get_param("size", ArrayModel.DEFAULT_SIZE))
+    if not name in save:
+        save[name] = {}
+    if not size in save[name]:
+        save[name][size] = INF
+    save[name][size] = min(float(result.text), save[name][size])
+    GlobalScene.write_save(save)
 
 func _on_Button_pressed(scene):
     GlobalScene.change_scene("res://scenes/" + scene + ".tscn",

scripts/scene.gd

@@ -14,3 +14,15 @@ func get_param(name, default=null):
     if _params != null and _params.has(name):
         return _params[name]
     return default
+
+func read_save():
+    var file = File.new()
+    file.open("user://save.json", File.READ)
+    return {} if not file.is_open() else parse_json(file.get_as_text())
+    file.close()
+
+func write_save(save):
+    var file = File.new()
+    file.open("user://save.json", File.WRITE)
+    file.store_line(to_json(save))
+    file.close()