chore: use es2017 lib

README.md

@@ -3,50 +3,42 @@
 [![ci](https://github.com/icetemple/it-fsm/actions/workflows/ci.yml/badge.svg)](https://github.com/icetemple/it-fsm/actions/workflows/ci.yml)
 [![Coverage Status](https://coveralls.io/repos/github/icetemple/it-fsm/badge.svg?branch=master)](https://coveralls.io/github/icetemple/it-fsm?branch=master)
 
-Simple finite state machine
+Simple full-featured finite state machine for your project
 
-### Installation
+### Why it-fsm?
 
-`npm install --save it-fsm`
+- 🚯 333 LOC - 0 dependencies
+- 🍒 Sophisticated object-oriented design
 
-### Usage
+
+### Getting started
 
 ```ts
 import { StateMachineBuilder } from "it-fsm";
 
-enum ProjectStatus {
-  Pending = "pending",
-  Active = "active",
-  Completed = "completed",
-  Archived = "archive",
-}
+const [locked, unlocked] = ['locked', 'unlocked'] as const;
 
-const smbProject = new StateMachineBuilder()
-  .withStates(Object.values(ProjectStatus))
+const sm = new StateMachineBuilder()
+  .withStates([locked, unlocked])
   .withTransitions([
-    [ProjectStatus.Pending, [ProjectStatus.Active, ProjectStatus.Archived]],
-    [ProjectStatus.Active, [ProjectStatus.Completed]],
-  ]);
-
-async function main() {
-  const project1 = { id: 1, status: ProjectStatus.Pending };
-  const project2 = { id: 2, status: ProjectStatus.Completed };
-
-  // Build FSM with current project status
-  const smForProject1 = smbProject.build(project1.status);
-  const smForProject2 = smbProject.build(project2.status);
-
-  console.log(smForProject2.allowedTransitionStates()); // []
-
-  console.log(smForProject1.allowedTransitionStates()); // [active, archived]
-  await smForProject1.changeState(ProjectStatus.Active);
-
-  console.log(smForProject1.allowedTransitionStates()); // [completed]
-  await smForProject1.changeState(ProjectStatus.Completed);
-
-  console.log(smForProject1.allowedTransitionStates()); // []
-}
-
-main();
-
+    [locked, { coin: unlocked }],
+    [unlocked, { push: locked }],
+  ])
+  .build(locked);
 ```
+
+or with deno
+
+```ts
+import { StateMachineBuilder } from "https://raw.githubusercontent.com/icetemple/it-fsm/master/fsm.ts";
+
+// ...
+```
+
+You can find the full example in the examples folder.
+
+### Install
+
+If you want to use it in Node.js or the browser, you may need to install it as follows
+
+`npm install --save it-fsm`

examples/turnstile.ts

@@ -0,0 +1,30 @@
+import { StateMachineBuilder } from "../fsm.ts";
+
+const [locked, unlocked] = ["locked", "unlocked"] as const;
+
+const smbTurnstile = new StateMachineBuilder()
+  .withStates([locked, unlocked])
+  .withTransitions([
+    [locked, { coin: unlocked }],
+    [unlocked, { push: locked }],
+  ]);
+
+async function main() {
+  const sm = smbTurnstile.build(locked);
+
+  function logCurrentState() {
+    console.log("current state", JSON.stringify(sm.currentState.name));
+  }
+
+  logCurrentState();
+  await sm.trigger("coin", {});
+  logCurrentState();
+  await sm.trigger("push", {});
+  logCurrentState();
+  await sm.trigger("push", {});
+  logCurrentState();
+}
+
+if (import.meta.main) {
+  main();
+}

fsm.ts

@@ -1,23 +1,23 @@
-type StateTransitions<Ctx, SN extends string> = WeakMap<
+export type StateTransitions<Ctx, SN extends string> = WeakMap<
   State<Ctx, SN>,
   WeakSet<State<Ctx, SN>>
 >;
 
-type StateOrName<Ctx, SN extends string> =
+export type StateOrName<Ctx, SN extends string> =
   | State<Ctx, SN>
   | SN;
 
-type SourceTransitions<SN extends string> = Array<[SN, Array<SN>]>;
-type SourceNamedTransitions<SN extends string> = Array<
+export type SourceTransitions<SN extends string> = Array<[SN, Array<SN>]>;
+export type SourceNamedTransitions<SN extends string> = Array<
   [SN, Record<string, SN>]
 >;
-type SourceActions<SN extends string> = Record<string, Array<[SN, SN]>>;
+export type SourceActions<SN extends string> = Record<string, Array<[SN, SN]>>;
 
 export const _states = Symbol("states");
-const _transitions = Symbol("transitions");
-const _actions = Symbol("actions");
-const _prevState = Symbol("previous state");
-const _currState = Symbol("current state");
+export const _transitions = Symbol("transitions");
+export const _actions = Symbol("actions");
+export const _prevState = Symbol("previous state");
+export const _currState = Symbol("current state");
 
 export class StateMachineBuilder<Ctx, SN extends string = string> {
   [_states]: Map<SN, Events<Ctx, SN>>;
@@ -123,12 +123,12 @@ export class StateMachineBuilder<Ctx, SN extends string = string> {
   }
 }
 
-interface StateMachineOpts<Ctx, SN extends string> {
+export interface StateMachineOpts<Ctx, SN extends string> {
   transitions?: StateTransitions<Ctx, SN>;
   actions?: Actions<Ctx, SN>;
 }
 
-type Actions<Ctx, SN extends string> = Map<
+export type Actions<Ctx, SN extends string> = Map<
   string,
   Array<[State<Ctx, SN>, State<Ctx, SN>]>
 >;
@@ -219,10 +219,10 @@ export class StateMachine<Ctx, SN extends string = string> {
   }
 }
 
-const _stateName = Symbol("state name");
-const _stateEvents = Symbol("state events");
+export const _stateName = Symbol("state name");
+export const _stateEvents = Symbol("state events");
 
-interface Events<Ctx, SN extends string> {
+export interface Events<Ctx, SN extends string> {
   beforeExit?(
     fromState: State<Ctx, SN>,
     toState: State<Ctx, SN>,
@@ -274,42 +274,46 @@ export class State<Ctx, SN extends string = string> {
   }
 }
 
-function validNormalizedState<Ctx, SN extends string>(
+export function validNormalizedState<Ctx, SN extends string>(
   states: State<Ctx, SN>[],
   state: StateOrName<Ctx, SN>,
 ) {
   return validState<Ctx, SN>(normalizeState(states, state));
 }
 
-function normalizeState<Ctx, SN extends string>(
+export function normalizeState<Ctx, SN extends string>(
   states: State<Ctx, SN>[],
   state: StateOrName<Ctx, SN>,
 ): State<Ctx, SN> | undefined {
   return isStr(state) ? stateFromName(states, state) : state;
 }
 
-function validStateFromName<Ctx, SN extends string>(
+export function validStateFromName<Ctx, SN extends string>(
   states: State<Ctx, SN>[],
   name: SN,
 ) {
   return validState<Ctx, SN>(stateFromName(states, name));
 }
 
-function stateFromName<Ctx, SN extends string>(
+export function stateFromName<Ctx, SN extends string>(
   states: State<Ctx, SN>[],
   name: SN,
 ) {
   return states.find((state) => state.name === name);
 }
 
-function validState<Ctx, SN extends string>(val: unknown): State<Ctx, SN> {
+export function validState<Ctx, SN extends string>(
+  val: unknown,
+): State<Ctx, SN> {
   if (!isState<Ctx, SN>(val)) {
     throw new TypeError("an instance of State class is expected");
   }
   return val;
 }
 
-function isState<Ctx, SN extends string>(val: unknown): val is State<Ctx, SN> {
+export function isState<Ctx, SN extends string>(
+  val: unknown,
+): val is State<Ctx, SN> {
   return val instanceof State;
 }
 

tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "allowJs": false,
-    "lib": ["es7"],
+    "lib": ["es2017"],
     "declaration": true,
     "module": "commonjs",
     "moduleResolution": "node",