create foundational system types

src/types.ts

@@ -0,0 +1,74 @@
+export type PlayerColor = 'black' | 'blue' | 'green' | 'red' | 'yellow'
+
+export interface Player {
+  readonly color: PlayerColor
+
+  /** The routes owned by the player. */
+  readonly routes: Route[]
+
+  /** The number of train pieces the player has remaining. */
+  readonly trains: number
+}
+
+/** An (x,y) point on the map. */
+export interface Point {
+  readonly x: number
+  readonly y: number
+}
+
+export interface City extends Point {
+  readonly name: string
+}
+
+export interface BaseRoute {
+  readonly type: RouteType
+
+  /** Unique identifier for the route. */
+  readonly id: `${string}-${string}`
+
+  /** The cities the route connects. */
+  readonly cities: [string, string]
+
+  /** The number of spaces in the route. */
+  readonly spaces: number
+}
+
+export interface SingleRoute extends BaseRoute {
+  readonly type: RouteType.Single
+
+  /** The color of the route. */
+  readonly color: RouteColor
+}
+
+export interface DoubleRoute extends BaseRoute {
+  readonly type: RouteType.Double
+
+  /** The colors of the two lines of this route. */
+  readonly colors: [RouteColor, RouteColor]
+}
+
+export type Route = SingleRoute | DoubleRoute
+
+export type RouteColor =
+  | 'pink'
+  | 'white'
+  | 'blue'
+  | 'yellow'
+  | 'orange'
+  | 'black'
+  | 'red'
+  | 'green'
+  | 'none'
+
+export enum RouteType {
+  Single = 'single',
+  Double = 'double',
+}
+
+export interface DestinationTicket {
+  /** The cities this ticket must connect. */
+  readonly cities: [string, string]
+
+  /** The number of points this ticket is worth. */
+  readonly points: number
+}