initial provider (#2)

framework/medusa/cart/use-add-item.tsx

@@ -0,0 +1,63 @@
+import useAddItem, { UseAddItem } from '@commerce/cart/use-add-item'
+import { CommerceError } from '@commerce/utils/errors'
+import { MutationHook } from '@commerce/utils/types'
+import { MEDUSA_CART_ID_COOKIE } from '@framework/const'
+import { MedusaAddItemProps } from '@framework/types'
+import type { AddItemHook } from '../types/cart'
+import { normalizeCart } from '@framework/utils/normalizers/normalize-cart'
+import { useCart } from 'framework/local/cart'
+import Cookies from 'js-cookie'
+import { useCallback } from 'react'
+
+export default useAddItem as UseAddItem<typeof handler>
+
+export const handler: MutationHook<AddItemHook> = {
+  fetchOptions: {
+    query: 'carts',
+    method: 'addItem',
+  },
+  async fetcher({ input: item, options, fetch }) {
+    if (item.quantity && !Number.isInteger(item.quantity)) {
+      throw new CommerceError({
+        message: 'The item quantity has to be a valid integer greater than 0',
+      })
+    }
+
+    const variables: {
+      cart_id: string
+      payload: MedusaAddItemProps
+    } = {
+      cart_id: Cookies.get(MEDUSA_CART_ID_COOKIE)!,
+      payload: {
+        variant_id: item.variantId,
+        quantity: item.quantity ?? 1,
+      },
+    }
+
+    try {
+      const data = await fetch({
+        ...options,
+        variables,
+      })
+
+      return normalizeCart(data.cart)
+    } catch (e: any) {
+      console.log(e)
+      throw new CommerceError({ message: e.message })
+    }
+  },
+  useHook:
+    ({ fetch }) =>
+    () => {
+      const { mutate } = useCart()
+
+      return useCallback(
+        async function addItem(input) {
+          const data = await fetch({ input })
+          await mutate(data, false)
+          return data
+        },
+        [fetch, mutate]
+      )
+    },
+}