Implement save and loading games (#8)

game/ui/commons/save/save_game.gd

@@ -0,0 +1,59 @@
+extends Control
+
+signal back_button_pressed
+
+export(PackedScene) var slot_ui_scene
+
+var slot_pressed
+
+func _ready():
+	refresh_savegames()
+
+
+func _on_slot_pressed(p_slot_n: int):
+	slot_pressed = p_slot_n
+	if escoria.save_manager.save_game_exists(p_slot_n):
+		# TODO Manage save override, ask for confirmation
+		pass
+	else:
+		$save_name_popup.popup()
+
+
+func refresh_savegames():
+	for slot in $ScrollContainer/slots.get_children():
+		$ScrollContainer/slots.remove_child(slot)
+	
+	var saves_list = escoria.save_manager.get_saves_list()
+	for i in saves_list.size():
+		var save_data = saves_list[i+1]
+		var new_slot = slot_ui_scene.instance()
+		$ScrollContainer/slots.add_child(new_slot)
+		new_slot.set_slot_name_date(save_data["name"], save_data["date"])
+		new_slot.connect("pressed", self, "_on_slot_pressed", [i+1])
+	
+	var datetime = OS.get_datetime()
+	var datetime_string = "%02d/%02d/%02d %02d:%02d" % [
+		datetime["day"],
+		datetime["month"],
+		datetime["year"],
+		datetime["hour"],
+		datetime["minute"],
+	]
+	var new_slot = slot_ui_scene.instance()
+	$ScrollContainer/slots.add_child(new_slot)
+	new_slot.set_slot_name_date(tr("New save"), datetime_string)
+	new_slot.connect("pressed", self, "_on_slot_pressed", [saves_list.size()+1])
+		
+
+func _on_back_pressed():
+	emit_signal("back_button_pressed")
+
+
+func _on_save_name_popup_savegame_name_ok(p_savename: String):
+	escoria.save_manager.save_game(slot_pressed, p_savename)
+	refresh_savegames()
+	slot_pressed = null
+
+
+func _on_save_name_popup_savegame_cancel():
+	pass