feat: let the player talk to villagers and accept or decline personal requests

simulation/quests/PlayerNegotiationSystem.gd

@@ -0,0 +1,67 @@
+class_name PlayerNegotiationSystem
+extends RefCounted
+
+var quest_system: PlayerQuestSystem
+var npc_lookup: Callable
+var opportunity_provider: Callable
+var player_response_provider: Callable
+var quest_opened_signal: Signal
+var quest_expired_signal: Signal
+var standing_changed_signal: Signal
+
+
+func configure(
+	quests: PlayerQuestSystem,
+	lookup: Callable,
+	opportunity_source: Callable,
+	response_source: Callable,
+	opened: Signal,
+	expired: Signal,
+	standing: Signal
+) -> void:
+	quest_system = quests
+	npc_lookup = lookup
+	opportunity_provider = opportunity_source
+	player_response_provider = response_source
+	quest_opened_signal = opened
+	quest_expired_signal = expired
+	standing_changed_signal = standing
+
+
+func get_talk(npc_id: int) -> PlayerTalkResult:
+	var npc := npc_lookup.call(npc_id) as SimNPC
+	if npc == null or npc.is_dead:
+		return null
+	return quest_system.get_talk_for_requester(npc.id, npc.npc_name, opportunity_provider.call())
+
+
+func accept_request(npc_id: int, current_tick: int) -> PlayerQuestRecord:
+	var npc := npc_lookup.call(npc_id) as SimNPC
+	if npc == null:
+		return null
+	var opportunity: OpportunityStateRecord = opportunity_provider.call()
+	if opportunity == null or opportunity.get_interested_npc_id() != npc.id:
+		return null
+	var result: Dictionary = quest_system.accept_opportunity_quest(
+		opportunity, player_response_provider.call(), current_tick
+	)
+	var quest := result.get("quest") as PlayerQuestRecord
+	if quest != null and result.get("created", false) and not quest_opened_signal.is_null():
+		quest_opened_signal.emit(quest)
+	return quest
+
+
+func decline_request(npc_id: int, current_tick: int) -> PlayerQuestRecord:
+	var npc := npc_lookup.call(npc_id) as SimNPC
+	if npc == null:
+		return null
+	var opportunity: OpportunityStateRecord = opportunity_provider.call()
+	if opportunity == null or opportunity.get_interested_npc_id() != npc.id:
+		return null
+	var quest := quest_system.decline_opportunity_quest(opportunity, current_tick)
+	if quest != null:
+		if not quest_expired_signal.is_null():
+			quest_expired_signal.emit(quest)
+		if not standing_changed_signal.is_null():
+			standing_changed_signal.emit(quest_system.standing)
+	return quest