1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | 1x 1x 22x 15x 6x 6x 6x 1x 6x 6x 1x 1x 1x 3x 3x 3x 3x 15x 3x 6x 11x 11x 11x 11x 11x 11x 3x 1x 1x 1x 1x 12x 21x 11x 12x 3x 12x 3x 3x 5x 2x 2x 17x 45x 45x | // @flow import {factory} from "./subscribe" import type {Subscribe} from "./subscribe" import {shallowDiffers} from './shallow-differs' export type Actions = { [name: string]: Function } export type Action = { type: string, payload: any } export type State = { [name: string]: any, actions: Actions } export type Store = { getState: () => State, subscribe: Subscribe, dispatch: Function, callSubscriptions: Function } export type Reducer = { state: any, actions: Actions } const state = {}; const listeners = {}; function getState() { return state } function getStateByName(name: string) { return { [name]: state[name], ...actions[name] } } function dispatch(action: Action): Promise<Action> { const nextStatePromise = Promise.resolve({...state}); return applyMiddlewares(nextStatePromise, action).then(nextState => { if(shallowDiffers(state, nextState)) { applyNextState(nextState) } store.callSubscriptions(getState(), action); return action }) } export const store: Store = { getState, dispatch, ...factory([]) }; const actions = {}; const middlewares = []; export function register(name: string, reducer: Reducer) { state[name] = reducer.state; actions[name] = {}; listeners[name] = factory([]); Object.defineProperty(store, name, { get() { return getStateByName(name) }, configurable: true }); for (const actionName in reducer.actions) { actions[name][actionName] = function () { const nextStatePromise = Promise.resolve( reducer.actions[actionName].call( null, state[name], ...Array.from(arguments) ) ).then(value => { return { ...state, [name]: value } }); const action: Action = { type: actionName, payload: Array.from(arguments) }; return applyMiddlewares(nextStatePromise, action).then(nextState => { applyNextState(nextState); store.callSubscriptions(getState(), action) }) } } return dispatch({ type: 'REGISTER_REDUCER', payload: name }); } export function remove(name: string) { delete state[name]; delete actions[name]; delete store[name]; return dispatch({ type: 'REMOVE_REDUCER', payload: name }) } function applyNextState(nextState: State) { for (const i in listeners) { if (shallowDiffers(nextState[i], state[i])) { listeners[i].callSubscriptions(nextState[i]) } } Object.assign(state, nextState); } export function subscribe(name: string, fn: Function) { const callFn = nextState => { fn({ [name]: nextState, ...actions[name] }) }; callFn(state[name]); return listeners[name].subscribe(callFn) } export function use(middleware: Function) { middlewares.push(middleware) } export function unuse(middleware: Function) { const index = middlewares.indexOf(middleware); middlewares.splice(index, 1) } function applyMiddlewares(statePromise: Promise<any>, action: Action): Promise<any> { return middlewares.reduce((promise, middleware) => { return promise.then(value => { return middleware(store, Promise.resolve(value), action) }) }, Promise.resolve(statePromise)) } |