client can now only play allowed cards

elements/player_hand.gd

@@ -21,13 +21,39 @@ var _is_owned: bool
 @export var name_label: Label3D
 @export var rank_label: Label3D
 @export var hide_client_name: bool = false
+@export var card_disallowed_label: Label
 
 var _selected_card: PlayingCard = null
+var _cards_in_hand_ids: Array[int] = []
+
+var _trump_id: int = -1
+var _first_played_card_id: int = -1
 
 signal card_selected(card_id: int)
 signal card_played(card_id: int)
 
 func _ready() -> void:
+	# tests!
+	# tries playing same color
+	assert(_is_card_allowed(1, 3, [1, 15]) == true)
+	# tries playing trump while having same color
+	assert(_is_card_allowed(15, 3, [1, 15]) == false)
+	# tries playing trump while not having the same color
+	assert(_is_card_allowed(15, 3, [19, 15]) == true)
+	# tries playing first card
+	assert(_is_card_allowed(27, -1, [27, 1, 15]) == true)
+	# tries playing wizard as first
+	assert(_is_card_allowed(59, -1, [59, 1, 15]) == true)
+	# tries playing wizard as non-first
+	assert(_is_card_allowed(59, 3, [59, 1, 15]) == true)
+	# tries playing wizard after first is wizard
+	assert(_is_card_allowed(59, 58, [59, 1, 15]) == true)
+	# tries playing numbered after first is jester
+	assert(_is_card_allowed(3, 54, [3, 1, 15]) == true)
+	
+	assert(_is_card_allowed(13, 48, [13]) == true)
+	
+	
 	if hide_client_name:
 		name_label.hide()
 
@@ -47,6 +73,7 @@ func add_cards(card_ids: Array[int], is_owned: bool) -> void:
 			card.card_clicked.connect(_on_card_clicked)
 		card.setup_card_details(card_id)
 		add_card(card)
+		_cards_in_hand_ids.append(card_id)
 		if card_ids.size() == 1:
 			card.rotate_y(PI)
 		await get_tree().create_timer(0.16).timeout
@@ -60,6 +87,7 @@ func remove_card_by_id(card_id: int) -> void:
 func remove_card(card: PlayingCard) -> void:
 	card_container.remove_child(card)
 	card.queue_free()
+	_cards_in_hand_ids.erase(card.card_details.card_id)
 	_arrange_cards()
 
 func _arrange_cards() -> void:
@@ -81,6 +109,15 @@ func _get_card_distance(card_count: int) -> float:
 		return _card_distance_min_others + ((_card_distance_max_others - _card_distance_min_others) * (1.0 - (float(card_count) / 19.0)))
 
 func _on_card_clicked(playing_card: PlayingCard) -> void:
+	print("check card is " + str(_first_played_card_id))
+	if not _is_card_allowed(
+		playing_card.card_details.card_id,
+		_first_played_card_id,
+		_cards_in_hand_ids,
+	):
+		_notify_disallowed_card()
+		return
+	
 	if _selected_card:
 		_selected_card.unselect()
 	if _selected_card == playing_card:
@@ -108,3 +145,61 @@ func display_rank(rank: int, score: int) -> void:
 		"rank": rank,
 		"pts": score,
 	})
+
+func _is_card_allowed(requested_card_id: int, first_played_card_id: int, hand_card_ids: Array[int]) -> bool:
+	var card_color: Card.CardColor = CardManager.get_card_color(requested_card_id)
+	var first_played_color = CardManager.get_card_color(first_played_card_id)
+	
+	print("card details: req: {r}, play: {p}, hand: {han}".format({
+		"r": requested_card_id,
+		"p": first_played_card_id,
+		"han": hand_card_ids,
+	}))
+	
+	# no card played yet, everything is allowed
+	if first_played_card_id == -1:
+		print("no first played")
+		return true
+	
+	if first_played_color == Card.CardColor.WHITE:
+		print("first is white")
+		return true
+	
+	# card is white, may play
+	if card_color == Card.CardColor.WHITE:
+		print("yours is white, may play")
+		return true
+	
+	# requested card is same color as laid card; may play
+	if first_played_color == card_color:
+		print("colors match")
+		return true
+	# requested card is of different color
+	else:
+		var colors_in_hand: Array[Card.CardColor] = []
+		for id in hand_card_ids:
+			colors_in_hand.append(CardManager.get_card_color(id))
+		
+		# player has played color, must play requested color
+		if colors_in_hand.has(first_played_color):
+			print("has played color, must not play")
+			return false
+		# player does not have played color, may play anything
+		else:
+			print("does not have played color, may play")
+			return true
+
+func _notify_disallowed_card() -> void:
+	if card_disallowed_label:
+		card_disallowed_label.show()
+		await get_tree().create_timer(1.0).timeout
+		card_disallowed_label.hide()
+
+func _on_web_client_tcp_trump_received(trump_id: int) -> void:
+	_trump_id = trump_id
+
+func _on_web_client_tcp_received_first_card(card_id: int) -> void:
+	_first_played_card_id = card_id
+
+func _on_web_client_tcp_reset_first_card() -> void:
+	_first_played_card_id = -1