Server authority

server/game/crafting.ts

@@ -0,0 +1,131 @@
+import { Container, ItemStack } from "$/common/inventory.ts";
+import { CRAFTING_RESULT_SLOT } from "$/common/protocol.ts";
+
+export interface CraftingRecipe {
+	width: number;
+	height: number;
+	pattern: (string | undefined)[];
+	result: { id: string; count: number };
+}
+
+const recipes: CraftingRecipe[] = [
+	{
+		width: 3,
+		height: 3,
+		pattern: [
+			"bworld:planks",
+			"bworld:planks",
+			"bworld:planks",
+			"bworld:planks",
+			undefined,
+			"bworld:planks",
+			"bworld:planks",
+			"bworld:planks",
+			"bworld:planks",
+		],
+		result: { id: "bworld:chest", count: 1 },
+	},
+	{
+		width: 3,
+		height: 3,
+		pattern: [
+			"bworld:stone",
+			"bworld:stone",
+			"bworld:stone",
+			"bworld:stone",
+			undefined,
+			"bworld:stone",
+			"bworld:stone",
+			"bworld:stone",
+			"bworld:stone",
+		],
+		result: { id: "bworld:furnace", count: 1 },
+	},
+	{
+		width: 1,
+		height: 1,
+		pattern: [
+			"bworld:log",
+		],
+		result: { id: "bworld:planks", count: 2 },
+	},
+	{
+		width: 1,
+		height: 2,
+		pattern: [
+			"bworld:planks",
+			"bworld:planks",
+		],
+		result: { id: "bworld:stick", count: 2 },
+	},
+	{
+		width: 3,
+		height: 3,
+		pattern: [
+			"bworld:planks",
+			"bworld:planks",
+			"bworld:planks",
+			undefined,
+			"bworld:stick",
+			undefined,
+			undefined,
+			"bworld:stick",
+			undefined,
+		],
+		result: { id: "bworld:wood_pickaxe", count: 1 },
+	},
+];
+
+function get_crafting_grid(crafting: Container): (string | undefined)[] {
+	const grid: (string | undefined)[] = [];
+	for (let i = 0; i < 9; i++) {
+		grid.push(crafting.get_item(i)?.type_id);
+	}
+	return grid;
+}
+
+function matches_recipe(grid: (string | undefined)[], recipe: CraftingRecipe): boolean {
+	for (let y = 0; y <= 3 - recipe.height; y++) {
+		for (let x = 0; x <= 3 - recipe.width; x++) {
+			let match = true;
+
+			for (let gy = 0; gy < 3; gy++) {
+				for (let gx = 0; gx < 3; gx++) {
+					const grid_index = gy * 3 + gx;
+
+					if (gx >= x && gx < x + recipe.width && gy >= y && gy < y + recipe.height) {
+						const recipe_index = (gy - y) * recipe.width + (gx - x);
+						if (grid[grid_index] !== recipe.pattern[recipe_index]) {
+							match = false;
+							break;
+						}
+					} else if (grid[grid_index] !== undefined) {
+						match = false;
+						break;
+					}
+				}
+				if (!match) break;
+			}
+
+			if (match) return true;
+		}
+	}
+
+	return false;
+}
+
+// puts what the grid makes in the result slot
+export function update_crafting_result(crafting: Container) {
+	const grid = get_crafting_grid(crafting);
+	const recipe = recipes.find((recipe) => matches_recipe(grid, recipe));
+	crafting.set_item(CRAFTING_RESULT_SLOT, recipe ? new ItemStack(recipe.result.id, recipe.result.count) : undefined);
+}
+
+export function consume_recipe_items(crafting: Container) {
+	for (let i = 0; i < 9; i++) {
+		const slot = crafting.get_slot(i);
+		if (slot.has_item()) {
+			slot.amount = slot.amount! - 1;
+		}
+	}
+}