NpcOffer.cs

// NPCs can offer various services, like teleport, guild management, trading, etc.
// => we use an abstract NpcOffer class so that the UI can build the dialogue
//    automatically.
// => this way Npc dialogues only show what they offer. We don't have to hard
//    code any possible type of offer there anymore.
using Mirror;

namespace uMMORPG
{
    public abstract class NpcOffer : NetworkBehaviour
    {
        // does the npc have an offer for this player right now?
        // (for example, don't show Quests button if all quests were finished)
        public abstract bool HasOffer(Player player);

        // offer name for the UI npc dialogue entry
        public abstract string GetOfferName();

        // called when the player clicks the offer button
        public abstract void OnSelect(Player player);
    }
}