time travel with disto

index.js

import {Dis} from 'disto';
import {photo} from 'disto/record';

let {register, dispatch, lock, unlock} = new Dis();

let store = photo(register({x: 0}, o => ({x: o.x+1}))); // simple increments

store.subscribe(o => console.log(o.x)); // 0
let t1 = store.snapshot();
dispatch('xyz');  // 1
dispatch('xyz');  // 2
dispatch('xyz');  // 3
dispatch('xyz');  // 4

let t2 = store.snapshot();
dispatch('xyz');  // 5
dispatch('xyz');  // 6

lock();
dispatch('xyz');  // ignored
dispatch('xyz');  // ignored

store.goTo(t1);   // 0
console.log(store.get());       // {x:0}

store.goTo(t2);   // 4

store.restore();  // 6
console.log(store.get());      // {x: 6}

unlock();
dispatch('xyz');  // 7
dispatch('xyz');  // 8

• can do snapshots per-store
• doesn't care what you use; immutable, mori, cursors, etc.

open qs

• undo/redo?
• action replay at arbit snapshot
• dispatcher level snapshots