feat(emitter): emit constructor events on methods

src/methods/add-item.js

@@ -1,5 +1,6 @@
 import { randomObjectId } from '@ecomplus/utils'
 import fixItemQuantity from './../lib/fix-item-quantity'
+import emitter from './../lib/emitter'
 
 // add item to cart
 export default (self, newItem, save = true) => {
@@ -43,6 +44,7 @@ export default (self, newItem, save = true) => {
   if (save) {
     self.save()
   }
+  emitter('addItem', { cart, item: fixedItem })
   return fixedItem
 }
 

src/methods/clear.js

@@ -1,6 +1,9 @@
+import emitter from './../lib/emitter'
+
 export default ({ cart, save }) => {
   // empty the items array and save
   cart.items = []
+  emitter('clear', { cart })
   return save()
 }
 

src/methods/increase-item-qnt.js

@@ -1,8 +1,10 @@
 import fixItemQuantity from './../lib/fix-item-quantity'
+import emitter from './../lib/emitter'
 
 export default (self, itemId, quantity = 1, save = true) => {
+  const { cart } = self
   // find respective item on list by ID
-  const item = self.cart.items.find(({ _id }) => _id === itemId)
+  const item = cart.items.find(({ _id }) => _id === itemId)
   if (item) {
     item.quantity += quantity
     fixItemQuantity(item)
@@ -12,6 +14,7 @@ export default (self, itemId, quantity = 1, save = true) => {
   } else {
     return null
   }
+  emitter('increaseItemQnt', { cart, item })
   return item
 }
 

src/methods/remove-item.js

@@ -1,3 +1,5 @@
+import emitter from './../lib/emitter'
+
 export default (self, itemId, save = true) => {
   // find respective item on list by ID
   const { cart } = self
@@ -8,6 +10,7 @@ export default (self, itemId, save = true) => {
       // remove from items array
       cart.items.splice(i, 1)
       cart.save()
+      emitter('removeItemQnt', { cart, item })
       return item
     }
   }

src/methods/save.js

@@ -1,3 +1,5 @@
+import emitter from './../lib/emitter'
+
 export default self => {
   const { cart, storageKey, localStorage } = self
   // fix cart subtotal first
@@ -9,6 +11,7 @@ export default self => {
   if (typeof localStorage === 'object' && localStorage) {
     localStorage.setItem(storageKey, JSON.stringify(cart))
   }
+  emitter('save', { cart })
   return self
 }