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December 18, 2019 14:43
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| const cartActions = { | |
| addProduct: assign((ctx, evt)=> ({ | |
| cart:{ | |
| ...ctx.cart, | |
| count: ctx.cart.count + 1, | |
| products: [...ctx.cart.products, evt.payload] | |
| } | |
| })), | |
| addSaveForLater: assign((ctx, evt)=>({ | |
| savedForLater:{ | |
| ...ctx.savedForLater, | |
| count: ctx.savedForLater.count + 1, | |
| products: [...ctx.savedForLater.products, evt.payload] | |
| } | |
| })), | |
| removeProduct: assign((ctx, evt)=> ({ | |
| cart:{ | |
| ...ctx.cart, | |
| count: ctx.cart.count - 1, | |
| products: ctx.cart.products.filter(p => { | |
| if(p.id === evt.payload.id){ | |
| return false | |
| } | |
| return true | |
| }) | |
| } | |
| })), | |
| unsaveProduct: assign((ctx, evt)=> ({ | |
| savedForLater:{ | |
| ...ctx.savedForLater, | |
| count: ctx.savedForLater.count - 1, | |
| products: ctx.savedForLater.products.filter(p => { | |
| if(p.id === evt.payload.id){ | |
| return false | |
| } | |
| return true | |
| }) | |
| } | |
| })), | |
| updateProduct: assign((ctx, evt) => ({ | |
| cart:{ | |
| ...ctx.cart, | |
| products: ctx.cart.products.map( p => { | |
| if(p.id === evt.payload.id){ | |
| return { | |
| ...p, | |
| ...evt.payload | |
| } | |
| } | |
| return p | |
| }) | |
| } | |
| })), | |
| saveForLater: send((context, event) => ({ | |
| type: 'ADD_TO_LIST', | |
| payload: event.payload | |
| })), | |
| moveToCart: send((context, event) => ({ | |
| type: 'ADD', | |
| payload: event.payload | |
| })) | |
| } | |
| //this is how to unit test these ations | |
| // console.log(cartActions.increment.assignment({count:100}, {"type":"ADD"})) | |
| const cartGuards= { | |
| isCartEmpty: (ctx, evt) => ctx.cart.count < 1, | |
| isSavedEmpty: (ctx, evt) => ctx.savedForLater.count < 1, | |
| isProduct: (ctx, evt) => { | |
| const p = evt.payload | |
| return p && p.id && p.id.length > 0 // add more validations | |
| } | |
| } | |
| const cartmachine = Machine({ | |
| id: 'cartMachine', | |
| initial: 'empty', | |
| context: { | |
| cart: { | |
| count: 0, | |
| products: [], | |
| subtotal:0, | |
| delivery:0, | |
| estimatedTaxesAndFees:0, | |
| estimatedTotal:0, | |
| error: undefined | |
| }, | |
| savedForLater: { | |
| count: 0, | |
| products: [], | |
| } | |
| }, | |
| type: 'parallel', | |
| states: { | |
| cart: { | |
| id: 'cart', | |
| initial: 'empty', | |
| states: { | |
| empty: { | |
| on: { | |
| ADD: { | |
| target: 'unpaid', | |
| actions: ['addProduct'], | |
| cond: 'isProduct' | |
| }, | |
| } | |
| }, | |
| unpaid:{ | |
| initial:'normal', | |
| on: { | |
| '': { | |
| target: 'empty', | |
| cond: 'isCartEmpty' | |
| }, | |
| SAVE_FOR_LATER: { | |
| actions: ['saveForLater', 'removeProduct'] | |
| }, | |
| REMOVE: { | |
| target: '.normal', | |
| actions: 'removeProduct', | |
| cond: 'isProduct' | |
| }, | |
| ADD: { | |
| target: '.normal', | |
| actions: 'addProduct', | |
| cond: 'isProduct' | |
| }, | |
| UPDATE_QTY: { | |
| target: '.normal', | |
| actions: 'updateProduct', | |
| cond: 'isProduct' | |
| }, | |
| UPDATE_PRICE: { | |
| target: '.normal', | |
| actions: 'updateProduct', | |
| cond: 'isProduct' | |
| }, | |
| PAY: 'paying' | |
| }, | |
| states: { | |
| error: {}, | |
| normal: {} | |
| } | |
| }, | |
| paying:{ | |
| on: { | |
| RESOLVE: 'paid', | |
| REJECT: 'unpaid.error' | |
| } | |
| }, | |
| paid: { | |
| after: { | |
| 1000: 'empty' | |
| } | |
| } | |
| } | |
| }, | |
| savedForLater:{ | |
| id: 'savedForLater', | |
| initial: 'empty', | |
| on: { | |
| ADD_TO_LIST: { | |
| target:'.saved', | |
| actions: 'addSaveForLater' | |
| }, | |
| }, | |
| states:{ | |
| empty:{}, | |
| saved:{ | |
| on: { | |
| '': | |
| { | |
| target: 'empty', | |
| cond: 'isSavedEmpty' | |
| } | |
| , | |
| UNSAVE: '', | |
| MOVE_TO_CART: { | |
| actions: ['moveToCart', 'unsaveProduct'] | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| },{ | |
| actions: cartActions, | |
| guards: cartGuards | |
| }); | |
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