add steam overlay, achievements and stats managers

core/steam_manager/achievement_manager.gd

@@ -0,0 +1,73 @@
+extends Node
+
+#Achievement e statistiche devono essere pubblicati live nel backend
+#Steamworks anche se il gioco non è ancora uscito altrimenti le chiamate ritornano errore
+const KNOWN := [
+	"ACH_FIRST_WIN",
+	"ACH_PLAY_10_GAMES",
+	"ACH_REACH_LEVEL_5",
+]
+
+#how it works:
+#func _on_player_won() -> void:
+#    Achievements.unlock("ACH_FIRST_WIN") #unlock the achievement at first win
+
+#func _on_match_finished(coins_collected: int) -> void:
+	#update stats
+	#...
+	#check thresholds and unlock achievements
+#    if Stats.get_int("stat_games_played") >= 10:
+#        Achievements.unlock("ACH_PLAY_10_GAMES")
+#    if Stats.get_int("stat_total_coins") >= 100:
+#        Achievements.unlock("ACH_COLLECT_100_COINS")
+
+signal unlocked(api_name: String)
+
+func _ready() -> void:
+	if not SteamManager.is_on_steam:
+		return
+	
+	Steam.user_achievement_stored.connect(_on_achievement_stored)
+	Steam.global_achievement_percentages_ready.connect(_on_global_percentages_ready)
+	Steam.requestGlobalAchievementPercentages()   # asincrona
+
+func _on_global_percentages_ready(_game: int, _result: int) -> void:
+	pass
+
+func unlock(api_name: String) -> void:
+	if not KNOWN.has(api_name):
+		push_warning("Achievement unknown: %s" % api_name)
+		return
+	if is_unlocked(api_name):
+		return
+	if not Steam.setAchievement(api_name):
+		push_error("setAchievement failed (is published on Steam?): %s" % api_name)
+		return
+	Steam.storeStats()
+	unlocked.emit(api_name)
+
+func is_unlocked(api_name: String) -> bool:
+	var data: Dictionary = Steam.getAchievement(api_name)
+	return data.get("achieved", false)
+
+func get_display_name(api_name: String) -> String:
+	return Steam.getAchievementDisplayAttribute(api_name, "name")
+
+func get_description(api_name: String) -> String:
+	return Steam.getAchievementDisplayAttribute(api_name, "desc")
+
+#Global percentage of player who have unlocked the achievement
+func get_global_percent(api_name: String) -> float:
+	var data: Dictionary = Steam.getAchievementAchievedPercent(api_name)
+	if not data.get("ret", false):
+		return -1.0   #global percentage not yet available
+	return data.get("percent", 0.0)
+	
+#for development only: reset an achievement
+func clear(api_name: String) -> void:
+	Steam.clearAchievement(api_name)
+	Steam.storeStats()
+
+func _on_achievement_stored(_game: int, _group: bool, api_name: String,
+		current: int, maximum: int) -> void:
+	print("Achievement confirmed by server: %s (%d/%d)" % [api_name, current, maximum])