Implement main game as a mod

common/everything_registry.ts

@@ -5,6 +5,9 @@ export class EverythingRegistry {
 	static #id_to_value = new Map<string, unknown[]>();
 
 	static register<T>(registry: string, key: string, value: T): T {
+		if (this.#key_to_id.get(registry)?.has(key)) {
+			throw new Error(`${key} is already registered in ${registry}`);
+		}
 		if (!this.#key_to_id.has(registry)) {
 			this.#key_to_id.set(registry, new Map());
 			this.#id_to_value.set(registry, []);
@@ -49,6 +52,12 @@ export class EverythingRegistry {
 		return this.#id_to_value.get(registry) as T[];
 	}
 
+	// forget everything, for tests that load mods more than once
+	static clear() {
+		this.#key_to_id.clear();
+		this.#id_to_value.clear();
+	}
+
 	// [key, value] pairs in registration order
 	static entries<T>(registry: string): [string, T][] {
 		const values = this.#id_to_value.get(registry) ?? [];
@@ -104,6 +113,8 @@ export interface BlockRegistry {
 	interactive?: boolean;
 	// placing a block into it replaces it, like water
 	replaceable?: boolean;
+	// custom components from mods and their params, the server runs them
+	components?: Record<string, unknown>;
 
 	compiled_states?: CompiledStateDefinition[];
 }
@@ -112,6 +123,9 @@ export interface ItemRegistry<T = unknown | undefined> {
 	texture_id: string | ((item: ItemStack<T>) => string);
 	block_id?: string;
 	tool_type?: string;
+	max_stack?: number;
+	lore?: string;
+	components?: Record<string, unknown>;
 
 	on_create?(item: ItemStack<T>): void;