ShopAPI

Content Warning Shop API

Exposes an easy-to-use API to add custom items to the in-game shop in Content Warning.

See the mod's GitHub repository for detailed setup instructions and usage information.

Features

• Custom items: Opens up the in-game shop to allow custom items to be added. This includes automatically synchronising item prices between players, and registering custom ItemDataEntry types defined in your mod to interface with the game's built-in item synchroniser.
• Synchronisation: Easily synchronise any arbitrary settings between players in a lobby using Steam Lobby Metadata keys via the SynchronisedMetadata class.
• Localisation: Extends and opens up the game's localisation system to allow items to be translated to the supported locales by patching item and shop related localised methods.

Integration

DO NOT bundle the mod's DLL with your own. Ensure that no ShopAPI.dll is included with your build.

Depending on your publishing target, you should instead require it as a dependency on your publishing platform:

Steam Workshop

When publishing on the Steam Workshop, add this Workshop Item as your item's dependency via the "Add/Remove Required Items" option (on your mod's page right hand side panel).

Steam will ensure that the dependency will load before your mod when the game is launched.

Thunderstore (BepInEx)

When building a BepInEx plugin, add this mod as a dependency to your plugin's main file:

[BepInDependency(ShopApiPlugin.MOD_GUID)]
public class YourCustomPlugin : BaseUnityPlugin
{
    // ...
}

If a specific version is needed, pass ShopApiPlugin.MOD_VER after the GUID.

When publishing on Thunderstore, add the mod's Dependency String to the manifest.json file, so mod managers can automatically fetch it.

Usage

Once added as a reference to your project, all classes are available under the ContentWarningShop namespace.

Creating items

Ideally Items should be preconfigured and packed into an 1, but you can also construct them at runtime if its easier.

Custom Items should have their persistentID, price, purchasable, Category, and icon properties set to work.

If you would like your item to have a chance to be randomly spawned in the Old World like other items, set spawnable to true, and itemType to Item.ItemType.Tool.

Registering items

Items can be registered via the RegisterItem method:

//using ContentWarningShop;

var yourCustomItem = yourAssetBundle.LoadAsset("yourItem");

Shop.RegisterItem(yourCustomItem);
Shop.RegisterCustomDataEntries();

NOTE: Item prices are automatically synchronised between players on lobby join. The price set by the lobby's host will be used for the entire lobby.

You can check if a custom item has been already registered via the IsItemRegistered method. The list of all registered custom items is also available via the CustomItems property.

If your item uses custom ItemDataEntry types, call the RegisterCustomDataEntries method to fetch and register all custom types defined in your assembly. This will let the game automatically synchronise the items' custom state between players. (See compatibility if you run into issues) It is enough call this method once per assembly / mod.

Updating item prices

If you need to update an item's price at any point after a lobby has been started, use the UpdateItemPrice method:

var success = Shop.UpdateItemPrice(yourCustomItem, price);

This will re-synchronise the item's price to every player. Note that only the lobby's host can update an item's price, so the method returns a boolean indicating if it was successful (if the local player had permissions).

Synchronising Settings

The SynchronisedMetadata class allows arbitrary settings to be synchronised between players through the use of Steam Lobby Metadata keys. Simply create a new instance with a specific type and key and it will be automatically updated whenever the key's value is changed.

TIP: Consider prepending your mod's GUID to the key to ensure it won't accidentally collide with a different mod.

For example to synchronise a simple boolean setting with false as the initial value:

public static readonly SynchronisedMetadata ExampleSetting = new("ExampleSetting", false);

An instance bound to a key will remain valid even if the player changes lobbies, so they can be kept for the entire run-time of the game.

To update a setting's value, call SetValue(T value). Only the lobby's host may update the value of a key, so the method returns a boolean indicating if the set was allowed. If it was rejected, the instance's value isn't updated. Use CanSet method to check if the current player has permission to update the setting.

The ValueChanged event will be raised with the new (current) value when a key is updated either locally or remotely.

IMPORTANT: Values are converted to strings when passed on to the steam lobby, so make sure your type can be cast to string and back.

NOTE: When not currently in a lobby, setting the value is permitted as if the current player was the host, and the ValueChanged event will still be raised.

In the scenario that you have separate player and lobby settings, and you want to apply the local player's settings when they host