wip: replace packages with pure files

packages/game/Event.ts

@@ -0,0 +1,48 @@
+import { Condition } from './condition/Condition'
+import {
+  ICommand,
+  ICondition,
+  IFileExistenceChecker,
+  IRequirements,
+  IResponse,
+} from './schema'
+
+export class Event {
+  id: string
+  private condition: Condition
+  private requirements: string[]
+
+  constructor(
+    id: string,
+    condition: ICondition,
+    private response: IResponse,
+    requirements?: IRequirements
+  ) {
+    this.id = id
+    this.condition = new Condition(condition)
+    this.requirements = requirements || []
+  }
+
+  async satisfies(
+    command: ICommand,
+    checker: IFileExistenceChecker
+  ): Promise<boolean> {
+    return this.condition.satisfies(command, checker)
+  }
+
+  private checkRequirements(completed: string[]): boolean {
+    return this.requirements.every((req) => completed.includes(req))
+  }
+
+  private finished(completed: string[]): boolean {
+    return completed.includes(this.id)
+  }
+
+  active(completed: string[]): boolean {
+    return !this.finished(completed) && this.checkRequirements(completed)
+  }
+
+  getResponse(): IResponse {
+    return this.response
+  }
+}