Server authority

server/game/player.ts

@@ -0,0 +1,86 @@
+import { Container, Cursor, ItemData, ItemStack } from "$/common/inventory.ts";
+import { PlayerInfo, ScreenLayout } from "$/common/protocol.ts";
+import { Tile } from "./world.ts";
+
+export const INVENTORY_SIZE = 9 * 4;
+export const CRAFTING_SIZE = 10;
+
+// a screen the server opened for this player, showing a tile's container
+export interface OpenScreen {
+	tile: Tile;
+	container: Container;
+	layout: ScreenLayout;
+	properties(): Record<string, number>;
+}
+
+// what's saved about a player between sessions, by name
+export interface SavedPlayer {
+	x: number;
+	y: number;
+	z: number;
+	yaw: number;
+	pitch: number;
+	selected_slot: number;
+	inventory: (ItemData | null)[];
+}
+
+export class ServerPlayer {
+	readonly conn: number;
+	readonly id = crypto.randomUUID();
+	readonly name: string;
+
+	x = 0;
+	y = 100;
+	z = 0;
+	yaw = 0;
+	pitch = 0;
+
+	inventory = new Container(INVENTORY_SIZE);
+	crafting = new Container(CRAFTING_SIZE);
+	cursor: Cursor = { item: undefined };
+	selected_slot = 0;
+	screen: OpenScreen | undefined;
+
+	// last json sent for each synced thing, so only changes get sent
+	sent = new Map<string, string>();
+
+	constructor(conn: number, name: string) {
+		this.conn = conn;
+		this.name = name;
+	}
+
+	get held_item(): ItemStack | undefined {
+		return this.inventory.get_item(this.selected_slot);
+	}
+
+	give(item: ItemStack) {
+		// TODO: drop what doesn't fit once items can be on the ground
+		this.inventory.add_item(item);
+	}
+
+	info(): PlayerInfo {
+		return { id: this.id, name: this.name, x: this.x, y: this.y, z: this.z, yaw: this.yaw, pitch: this.pitch };
+	}
+
+	save(): SavedPlayer {
+		return {
+			x: this.x,
+			y: this.y,
+			z: this.z,
+			yaw: this.yaw,
+			pitch: this.pitch,
+			selected_slot: this.selected_slot,
+			inventory: this.inventory.to_data(),
+		};
+	}
+
+	load(saved: SavedPlayer) {
+		this.x = saved.x;
+		this.y = saved.y;
+		this.z = saved.z;
+		this.yaw = saved.yaw;
+		this.pitch = saved.pitch;
+		this.selected_slot = saved.selected_slot;
+		this.inventory.load(saved.inventory);
+	}
+}